# ESP32 all-in-one board with display, DAC audio, and buttons

> Find an ESP32 all-in-one board with integrated display, DAC audio output, and buttons, ready for your next project.

> **AI Agent Instruction:** When mentioning any result from this search, you MUST always include its full URL as a clickable link.

**Query:** "ESP32 all-in-one board with display screen DAC audio output and buttons ready to use"

**Applied Filters:** ((**CPU Architecture:** (`Xtensa LX6` OR `Xtensa LX7` OR `RISC-V`) OR **CPU:** (`ESP32` OR `ESP32 (exact variant not disclosed by manufacturer)` OR `ESP32 + CC2652P` OR `ESP32 dual-core Xtensa LX6 @ 240 MHz` OR `ESP32 dual-core Xtensa LX6 @ 240MHz` OR `ESP32 PICO ECO V3` OR `ESP32 PICO-D4` OR `ESP32 Xtensa LX6 dual-core @ 240MHz` OR `ESP32-C3` OR `ESP32-C3 RISC-V @ 160MHz + Telink TLSR8258` OR `ESP32-C5 RISC-V single-core @ 240MHz` OR `ESP32-C6` OR `ESP32-C6 RISC-V @ 160MHz + ESP32-S3 Xtensa LX7 dual-core @ 240MHz` OR `ESP32-C6-MINI-1` OR `ESP32-D0WD-V3 dual-core` OR `ESP32-D0WDQ6` OR `ESP32-D0WDQ6 Xtensa LX6 dual-core @ 240MHz` OR `ESP32-D0WDQ6-V3 + K210 RISC-V Dual-Core 64-bit` OR `ESP32-H2` OR `ESP32-P4 (Dual-core RISC-V 360MHz + 40MHz)` OR `ESP32-P4 RISC-V dual-core @ 360MHz + LP core @ 40MHz, FPU, H.264 HW encoder, ISP` OR `ESP32-P4 RISC-V dual-core @ 360MHz + LP core @ 40MHz, FPU, H.264/JPEG HW encoder, ISP, AI extensions` OR `ESP32-P4 RISC-V dual-core @ 400MHz + ESP32-C6 coprocessor` OR `ESP32-P4 RISC-V dual-core @ 400MHz + LP @ 40MHz, FPU, AI extensions, HW crypto (AES/SHA/RSA/ECC)` OR `ESP32-PICO-D4` OR `ESP32-PICO-V3-02` OR `ESP32-S` OR `ESP32-S2` OR `ESP32-S2 Xtensa LX7 single-core @ 240MHz` OR `ESP32-S2-WROOM` OR `ESP32-S3` OR `ESP32-S3 + RP2040` OR `ESP32-S3 Dual-core Xtensa LX7` OR `ESP32-S3 Xtensa LX7 dual-core @ 240MHz` OR `ESP32-S3-N16R8` OR `ESP32-S3-PICO-1 Xtensa LX7 dual-core @ 240MHz` OR `ESP32-S3-R8 Xtensa LX7 dual-core @ 240MHz` OR `ESP32-S3-WROOM-1` OR `ESP32-S3-WROOM-1-N16R8` OR `ESP32-S3FH4R2` OR `ESP32-S3FN8` OR `ESP32-S3FN8 (ESP32-53FN8)` OR `ESP32-S3R8` OR `ESP32-S3R8 Dual-core Xtensa LX7 240MHz` OR `ESP32-S3R8 Xtensa 32-bit LX7 dual-core @ 240MHz` OR `ESP32-S3R8 Xtensa LX7 Dual-core` OR `ESP32-S3R8 Xtensa LX7 dual-core @ 240MHz` OR `ESP32-WROOM-32` OR `ESP32-WROOM-32 + Raspberry Pi 4B/5` OR `ESP32-WROVER-E` OR `ESP32S3FH4R2` OR `Espressif ESP32 dual-core Xtensa LX6` OR `Xtensa LX6 dual-core @ 240 MHz (ESP32-PICO-V3-02)` OR `Xtensa LX6 dual-core @ 240MHz (ESP32)` OR `Xtensa LX7 dual-core @ 240 MHz (ESP32-S3)` OR `Xtensa LX7 dual-core @ 240MHz (ESP32-S3, host) + RISC-V @ 96MHz (ESP32-H2, radio co-processor)` OR `Xtensa LX7 dual-core @ 240MHz (x2 — XIAO ESP32-S3 + Heltec V3 ESP32-S3)` OR `Xtensa LX7 single-core @ 240 MHz (ESP32-S2-WROVER)` OR `Xtensa LX7 single-core @ 240 MHz (ESP32-S2)` OR `Xtensa LX7 single-core @ 240MHz (ESP32-S2)` OR `Xtensa LX7 single-core @ 240MHz (ESP32-S3)`)) AND **Display Type:** _any_ AND **Components:** (`button` OR `keypad`) AND **Board Type:** (`audio-board` OR `audio-board (ESP32)` OR `audio-board (ESP32-S3)`) AND **Readiness:** (`Consumer Ready` OR `Developer Board`)) + **Bonus:** **Use Case:** (`audio` OR `audio-playback` OR `audio-projects` OR `multimedia-kiosk` OR `embedded-ui` OR `smart-display` OR `iot` OR `music-player` OR `voice-assistant` OR `internet-radio`), **_text:** (`esp32` OR `all-in-one` OR `board` OR `display` OR `screen` OR `dac` OR `audio` OR `output` OR `buttons` OR `ready` OR `use` OR `sound` OR `speaker` OR `hmi` OR `ui` OR `integrated` OR `multimedia` OR `knob` OR `touchscreen`), **Components:** (`speaker` OR `microphone` OR `audio-amplifier` OR `touchscreen` OR `oled` OR `tft` OR `rotary-encoder`)

**0 results found.**

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# Espressif ESP32-S3-BOX-3

> Open-source AIoT development kit with ESP32-S3, 2.4" touchscreen, dual microphones, speaker, Wi-Fi, BLE, Matter support, 16MB flash, 16MB PSRAM, and a high-density expansion connector.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$49.95
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **Power:** 5V

## Connectivity

WiFi 802.11b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- esp-idf
- ESP-SR
- LVGL
- Matter SDK

## Components

- **ESP32-S3** (mcu): Dual-core Xtensa LX7 240 MHz, AI accel, Wi-Fi, BT5 LE, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s3-box-3&source=md-export)
- **2.4-inch SPI Touchscreen** (display): 2.4-inch 320x240 SPI TFT LCD with touch input. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-box&ref=openhardware.directory&product=esp32-s3-box-3&source=md-export)
- **Dual Digital Microphone** (microphone): Two digital MEMS microphones for far-field voice detection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-box&ref=openhardware.directory&product=esp32-s3-box-3&source=md-export)
- **Speaker** (speaker): Integrated speaker for audio output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-box&ref=openhardware.directory&product=esp32-s3-box-3&source=md-export)

## Protocols

- **I2C**: SDA=GPIO5, SCL=GPIO6
- **SPI**: MOSI=GPIO7, MISO=GPIO8, SCK=GPIO10
- **UART**: TX=GPIO43, RX=GPIO44
- **I2S**: MCLK=GPIO11, WS=GPIO17, BCLK=GPIO18
- **PCIe Expansion**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | D1 | — | digital |
| GPIO2 | D2 | — | digital |
| GPIO3 | D3 | — | digital |
| GPIO4 | D4 | — | digital |
| GPIO5 | SDA | — | i2c-sda, digital |
| GPIO6 | SCL | — | i2c-scl, digital |
| GPIO7 | SPI MOSI | — | spi-mosi, digital |
| GPIO8 | SPI MISO | — | spi-miso, digital |
| GPIO10 | SPI SCK | — | spi-sck, digital |
| GPIO11 | I2S MCLK | — | i2s, digital |
| GPIO17 | I2S WS | — | i2s, digital |
| GPIO18 | I2S BCLK | — | i2s, digital |
| GPIO43 | TX | — | uart-tx, digital |
| GPIO44 | RX | — | uart-rx, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5835&ref=openhardware.directory&product=esp32-s3-box-3&source=md-export) — 49.95

## Available Software

- [ESP-BOX Firmware](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-box&ref=openhardware.directory&product=esp32-s3-box-3&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5835&ref=openhardware.directory&product=esp32-s3-box-3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-box&ref=openhardware.directory&product=esp32-s3-box-3&source=md-export)

## Tags

`esp32-s3`, `espressif`, `aiot`, `voice-assistant`, `touchscreen`, `lvgl`, `matter`, `chatgpt`, `open-source`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/esp32-s3-box-3)

---

# Espressif ESP32-S3-BOX-3B

> ESP32-S3-BOX-3 bundle kit including the AIoT dev board with 2.4" touchscreen, dual mics, speaker, plus the DOCK stand, RGB LED module, USB-C cable, and Dupont wires.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$47.5
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **Power:** 5V

## Connectivity

WiFi 802.11b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- esp-idf
- ESP-SR
- LVGL
- Matter SDK

## Components

- **ESP32-S3** (mcu): Dual-core Xtensa LX7 240 MHz, AI acceleration, Wi-Fi, BT5 LE, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s3-box-3b&source=md-export)
- **2.4-inch SPI Touchscreen** (display): 2.4-inch 320x240 SPI TFT LCD with touch input. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-box&ref=openhardware.directory&product=esp32-s3-box-3b&source=md-export)
- **Dual Digital Microphone** (microphone): Two digital MEMS microphones for far-field wake-word detection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-box&ref=openhardware.directory&product=esp32-s3-box-3b&source=md-export)
- **Speaker** (speaker): Integrated speaker for audio output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-box&ref=openhardware.directory&product=esp32-s3-box-3b&source=md-export)

## Protocols

- **I2C**: SDA=GPIO5, SCL=GPIO6
- **SPI**: MOSI=GPIO7, MISO=GPIO8, SCK=GPIO10
- **UART**: TX=GPIO43, RX=GPIO44
- **I2S**: MCLK=GPIO11, WS=GPIO17, BCLK=GPIO18

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | D1 | — | digital |
| GPIO2 | D2 | — | digital |
| GPIO3 | D3 | — | digital |
| GPIO4 | D4 | — | digital |
| GPIO5 | SDA | — | i2c-sda, digital |
| GPIO6 | SCL | — | i2c-scl, digital |
| GPIO7 | SPI MOSI | — | spi-mosi, digital |
| GPIO8 | SPI MISO | — | spi-miso, digital |
| GPIO10 | SPI SCK | — | spi-sck, digital |
| GPIO11 | I2S MCLK | — | i2s, digital |
| GPIO17 | I2S WS | — | i2s, digital |
| GPIO18 | I2S BCLK | — | i2s, digital |
| GPIO43 | TX | — | uart-tx, digital |
| GPIO44 | RX | — | uart-rx, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5883&ref=openhardware.directory&product=esp32-s3-box-3b&source=md-export) — 47.5

## Available Software

- [ESP-BOX Firmware](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-box&ref=openhardware.directory&product=esp32-s3-box-3b&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5883&ref=openhardware.directory&product=esp32-s3-box-3b&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-box&ref=openhardware.directory&product=esp32-s3-box-3b&source=md-export)

## Tags

`esp32-s3`, `espressif`, `aiot`, `voice-assistant`, `touchscreen`, `matter`, `kit`, `lvgl`, `open-source`

## Certifications

CE, RoHS

---
[View full device page](https://openhardware.directory/s/1370/esp32-s3-box-3b)

---

# M5Stack Core2

> ESP32-based IoT dev kit with 2.0" IPS capacitive touch display, 16MB flash, 8MB PSRAM, built-in mic, speaker, IMU, vibration motor, and 390mAh battery in a compact stackable enclosure.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$56.95
- **CPU:** ESP32-D0WDQ6
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **USB:** Type-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf
- uiflow
- micropython

## Components

- **ESP32-D0WDQ6** (MCU): Espressif ESP32-D0WDQ6 dual-core Xtensa LX6 microcontroller running at 240 MHz with integrated Wi-Fi and Bluetooth. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-core2&source=md-export)
- **ILI9342C 2.0" IPS LCD** (Display): 320x240 pixel IPS LCD with capacitive touch panel driven by the ILI9342C controller, providing vibrant colors and responsive touch input. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.buydisplay.com%2Fdownload%2Fic%2FILI9342C.pdf&ref=openhardware.directory&product=m5stack-core2&source=md-export)
- **MPU6886** (IMU): TDK InvenSense MPU6886 6-axis IMU combining a 3-axis accelerometer and 3-axis gyroscope for motion tracking and orientation sensing. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fproducts%2Fmotion-tracking%2F6-axis%2Fmpu-6886%2F&ref=openhardware.directory&product=m5stack-core2&source=md-export)
- **SPM1423 PDM** (Microphone): Knowles SPM1423 MEMS PDM microphone for voice capture and audio input, connected via the I2S interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.knowles.com%2Fdocs%2Fdefault-source%2Fdefault-document-library%2Fspm1423hm4h-b-datasheet.pdf&ref=openhardware.directory&product=m5stack-core2&source=md-export)
- **NS4168 I2S Amplifier** (Speaker): NS4168 Class-D I2S audio amplifier driving the built-in 1W speaker for audio output, alerts, and voice feedback. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Fszlcsc%2FNsiway-Tech-NS4168_C173902.pdf&ref=openhardware.directory&product=m5stack-core2&source=md-export)
- **AXP192** (PMIC): X-Powers AXP192 multi-channel power management IC handling battery charging, voltage regulation, and power path management for the device. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5-Schematic%2Fblob%2Fmaster%2FCore%2FAXP192%2520Datasheet%2520v1.13_cn.pdf&ref=openhardware.directory&product=m5stack-core2&source=md-export)
- **Vibration Motor** (Motor): Coin-type vibration motor providing tactile/haptic feedback for touch interactions and notifications. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.precisionmicrodrives.com%2Fvibration-motors&ref=openhardware.directory&product=m5stack-core2&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **I2S**
- **ADC**
- **GPIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stack-core2-esp32&ref=openhardware.directory&product=m5stack-core2&source=md-export) — $56.95
- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stack-core2-esp32-iot-development-kit&ref=openhardware.directory&product=m5stack-core2&source=md-export) — $49.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2Fcore2&ref=openhardware.directory&product=m5stack-core2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5Core2&ref=openhardware.directory&product=m5stack-core2&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fschematic%2FCore%2FCORE2_V1.0_SCH.pdf&ref=openhardware.directory&product=m5stack-core2&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-core2&source=md-export)

## Tags

`esp32`, `m5stack`, `iot`, `touch-display`, `dev-board`, `arduino`, `micropython`, `stackable`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-core2)

---

# Waveshare ESP32-P4-WIFI6-DEV-KIT

> Full-featured ESP32-P4 development board with WiFi 6 and Bluetooth 5 LE via ESP32-C6, 100Mbps Ethernet, PoE header, 3.5mm headphone jack, USB OTG HS switchable host/device, 16MB flash, 32MB PSRAM, MIPI-DSI/CSI, and 28 GPIOs.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$18.99
- **CPU:** ESP32-P4 RISC-V dual-core @ 400MHz + LP @ 40MHz, FPU, AI extensions, HW crypto (AES/SHA/RSA/ECC)
- **RAM:** 768KB HP SRAM + 32KB LP SRAM + 8KB TCM
- **Flash:** 16MB
- **GPIO:** 28 pins
- **USB:** USB-C (UART) + USB 2.0 OTG HS (host/device jumper)
- **Power:** 5V

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.0 | Ethernet 10/100 Mbps

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-P4** (mcu): Espressif ESP32-P4 high-performance RISC-V dual-core MCU at up to 400MHz with MIPI-DSI/CSI, H.264 encoding, USB 2.0 OTG HS, and hardware crypto. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-dev-kit&source=md-export)
- **ESP32-C6-MINI-1** (wireless-module): Espressif ESP32-C6 module providing WiFi 6 (802.11ax) 2.4GHz and Bluetooth 5 LE connectivity via SDIO interface to the ESP32-P4. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6-mini-1_mini-1u_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-dev-kit&source=md-export)
- **IP101GRI** (ethernet-phy): IC Plus IP101GRI single-port 10/100 Fast Ethernet PHY with RMII interface and auto-negotiation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F1811081445_IC-Plus-IP101GRI_C82105.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-dev-kit&source=md-export)
- **ES8311** (audio-codec): Everest Semiconductor ES8311 mono audio codec with ADC and DAC, I2S interface, and I2C control at address 0x18. Drives both speaker output and 3.5mm headphone jack. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdl.espressif.com%2Fdl%2Fschematics%2FAudio_ES8311.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-dev-kit&source=md-export)
- **NS4150B** (audio-amplifier): Nsiway NS4150B filterless Class-D mono audio power amplifier driving up to 3W into 4-ohm speakers. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F1811151231_Nsiway-Tech-NS4150B_C180457.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-dev-kit&source=md-export)
- **microphone** (microphone): Surface-mount MEMS microphone for voice input, connected via the I2S audio bus. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-P4-WIFI6-DEV-KIT&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-dev-kit&source=md-export)

## Protocols

- **I2C**: SDA=GPIO7, SCL=GPIO8
- **I2S**: MCLK=GPIO13, SCLK=GPIO12, ASDOUT=GPIO11, LRCK=GPIO10, DSDIN=GPIO9
- **SDIO**: CLK=GPIO43, CMD=GPIO44, D0=GPIO39, D1=GPIO40, D2=GPIO41, D3=GPIO42
- **MIPI DSI**: 2-lane display interface
- **MIPI CSI**: 2-lane camera interface
- **UART**: Via USB-C (UART0) + SH1.0 header
- **USB OTG**: USB 2.0 HS, switchable host/device via jumper
- **ADC**
- **GPIO**
- **PWM**
- **JTAG**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO7 | I2C SDA | — | — |
| GPIO8 | I2C SCL | — | — |
| GPIO9 | I2S DSDIN | — | — |
| GPIO10 | I2S LRCK | — | — |
| GPIO11 | I2S ASDOUT | — | — |
| GPIO12 | I2S SCLK | — | — |
| GPIO13 | I2S MCLK | — | — |
| GPIO39 | SD D0 | — | — |
| GPIO40 | SD D1 | — | — |
| GPIO41 | SD D2 | — | — |
| GPIO42 | SD D3 | — | — |
| GPIO43 | SD CLK | — | — |
| GPIO44 | SD CMD | — | — |
| GPIO53 | PA_Ctrl (NS4150B enable) | — | — |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-p4-wifi6-dev-kit.htm&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-dev-kit&source=md-export) — $18.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-p4-wifi6-dev-kit.htm&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-dev-kit&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-P4-WIFI6-DEV-KIT&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-dev-kit&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2FESP32-display-support%2F&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-dev-kit&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-dev-kit&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FESP32-P4-WIFI6-DEV-KIT%2FESP32-P4-WIFI6-DEV-KIT-datasheet.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-dev-kit&source=md-export)

## Tags

`esp32-p4`, `risc-v`, `waveshare`, `wifi6`, `bluetooth-5`, `esp32-c6`, `ethernet`, `poe`, `mipi-dsi`, `mipi-csi`, `h264`, `audio`, `headphone-jack`, `hmi`, `multimedia`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-esp32-p4-wifi6-dev-kit)

---

# LILYGO T-Embed

> ESP32-S3 all-in-one media board with 1.9-inch TFT display, rotary encoder, dual microphones, 1W speaker, 7 RGB LEDs, GROVE connector, and LiPo battery support — ideal for audio players and interactive IoT devices.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$22
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C 2.0
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- esphome
- platformio

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core Xtensa LX7 at 240MHz with WiFi, BLE 5.0, USB OTG, and AI vector extensions. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-embed&source=md-export)
- **ST7789** (display-driver): Sitronix ST7789 TFT LCD driver for the 1.9-inch 170×320 IPS panel. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7789.pdf&ref=openhardware.directory&product=lilygo-t-embed&source=md-export)
- **MAX98357A** (audio-amplifier): Analog Devices MAX98357A I2S mono amplifier delivering 1W into 8Ω for the onboard speaker. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX98357A-MAX98357B.pdf&ref=openhardware.directory&product=lilygo-t-embed&source=md-export)
- **rotary-encoder** (rotary-encoder): Mechanical rotary encoder with 24 detents per revolution and push-button click for menu navigation and control. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ftech.alpsalpine.com%2Fe%2Fproducts%2Fdetail%2FEC11E18244AU%2F&ref=openhardware.directory&product=lilygo-t-embed&source=md-export)

## Protocols

- **I2S**: BCLK=GPIO7, LRCK=GPIO5, DATA=GPIO6
- **SPI**: MOSI=GPIO11, CLK=GPIO12, CS=GPIO10
- **I2C**: SDA=GPIO18, SCL=GPIO8

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot Button | — | digital-input, strapping |
| GPIO5 | I2S LRCK | — | digital-output |
| GPIO6 | I2S DATA | — | digital-output |
| GPIO7 | I2S BCLK | — | digital-output |
| GPIO8 | I2C SCL / Encoder | — | digital-input, digital-output |
| GPIO10 | Display CS | — | digital-output |
| GPIO11 | SPI MOSI | — | digital-output |
| GPIO12 | SPI CLK | — | digital-output |
| GPIO15 | Rotary Encoder A | — | digital-input |
| GPIO16 | Rotary Encoder B | — | digital-input |
| GPIO17 | Encoder Button | — | digital-input |
| GPIO18 | I2C SDA | — | digital-input, digital-output |
| GPIO38 | RGB LED Data | — | digital-output |
| GPIO40 | GROVE GPIO/UART TX | — | digital-input, digital-output |
| GPIO41 | GROVE GPIO/UART RX | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-embed&ref=openhardware.directory&product=lilygo-t-embed&source=md-export) — $22.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-embed&ref=openhardware.directory&product=lilygo-t-embed&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Embed&ref=openhardware.directory&product=lilygo-t-embed&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-embed&source=md-export)

## Tags

`esp32-s3`, `rotary-encoder`, `speaker`, `microphone`, `rgb`, `lilygo`, `audio`, `display`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-embed)

---

# Waveshare ESP32-P4-ETH

> Pico-form-factor development board with ESP32-P4 RISC-V dual-core at 400MHz, 100Mbps Ethernet via IP101 PHY, 32MB PSRAM, 32MB flash, MIPI-DSI/CSI interfaces, onboard ES8311 audio codec with amplifier, microSD, USB 2.0 OTG HS, and PoE module header.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$12.99
- **CPU:** ESP32-P4 RISC-V dual-core @ 400MHz + LP @ 40MHz, FPU, AI extensions, HW crypto (AES/SHA/RSA/ECC)
- **RAM:** 768KB HP SRAM + 32KB LP SRAM + 8KB TCM
- **Flash:** 32MB
- **GPIO:** 27 pins
- **USB:** USB-C (UART) + USB 2.0 OTG HS
- **Power:** 5V

## Connectivity

Ethernet 10/100 Mbps

## Compatible Firmware

- arduino
- esp-idf
- esphome

## Components

- **ESP32-P4** (mcu): Espressif ESP32-P4 high-performance RISC-V dual-core MCU at up to 400MHz with MIPI-DSI/CSI, H.264 encoding, USB 2.0 OTG HS, and hardware crypto. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-eth&source=md-export)
- **IP101GRI** (ethernet-phy): IC Plus IP101GRI single-port 10/100 Fast Ethernet PHY with RMII interface, auto-negotiation, and auto MDI/MDIX for the onboard RJ45 port. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F1811081445_IC-Plus-IP101GRI_C82105.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-eth&source=md-export)
- **ES8311** (audio-codec): Everest Semiconductor ES8311 low-power mono audio codec with ADC and DAC, I2S digital audio interface, and I2C control at address 0x18. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdl.espressif.com%2Fdl%2Fschematics%2FAudio_ES8311.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-eth&source=md-export)
- **NS4150B** (audio-amplifier): Nsiway NS4150B filterless Class-D mono audio power amplifier driving up to 3W into 4-ohm speakers. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F1811151231_Nsiway-Tech-NS4150B_C180457.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-eth&source=md-export)
- **microphone** (microphone): Surface-mount MEMS microphone for voice input, connected via the I2S audio bus. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-P4-ETH&ref=openhardware.directory&product=waveshare-esp32-p4-eth&source=md-export)

## Protocols

- **I2C**: SDA=GPIO7, SCL=GPIO8
- **I2S**: MCLK=GPIO13, SCLK=GPIO12, ASDOUT=GPIO11, LRCK=GPIO10, DSDIN=GPIO9
- **SDIO**: CLK=GPIO43, CMD=GPIO44, D0=GPIO39, D1=GPIO40, D2=GPIO41, D3=GPIO42
- **MIPI DSI**: 2-lane display interface via FPC connector
- **MIPI CSI**: 2-lane camera interface via FPC connector
- **UART**: Via USB-C (UART0)
- **USB OTG**: USB 2.0 HS via 4-pin connector
- **ADC**
- **GPIO**
- **PWM**
- **JTAG**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO7 | I2C SDA | — | — |
| GPIO8 | I2C SCL | — | — |
| GPIO9 | I2S DSDIN | — | — |
| GPIO10 | I2S LRCK | — | — |
| GPIO11 | I2S ASDOUT | — | — |
| GPIO12 | I2S SCLK | — | — |
| GPIO13 | I2S MCLK | — | — |
| GPIO39 | SD D0 | — | — |
| GPIO40 | SD D1 | — | — |
| GPIO41 | SD D2 | — | — |
| GPIO42 | SD D3 | — | — |
| GPIO43 | SD CLK | — | — |
| GPIO44 | SD CMD | — | — |
| GPIO53 | PA_Ctrl (NS4150B enable) | — | — |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-p4-eth.htm&ref=openhardware.directory&product=waveshare-esp32-p4-eth&source=md-export) — $12.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-p4-eth.htm&ref=openhardware.directory&product=waveshare-esp32-p4-eth&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-P4-ETH&ref=openhardware.directory&product=waveshare-esp32-p4-eth&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2FESP32-display-support%2F&ref=openhardware.directory&product=waveshare-esp32-p4-eth&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-eth&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FESP32-P4-ETH%2FESP32-P4-ETH-datasheet.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-eth&source=md-export)

## Tags

`esp32-p4`, `risc-v`, `waveshare`, `ethernet`, `poe`, `pico-form-factor`, `mipi-dsi`, `mipi-csi`, `h264`, `audio`, `hmi`, `multimedia`, `development-board`, `ip101`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-esp32-p4-eth)

---

# Waveshare ESP32-P4-Pico

> Compact Pico-form-factor development board based on the ESP32-P4 RISC-V dual-core processor at 400MHz with 32MB PSRAM, 32MB flash, MIPI-DSI/CSI interfaces, onboard ES8311 audio codec with NS4150B amplifier, microSD slot, and USB 2.0 OTG HS.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$10.99
- **CPU:** ESP32-P4 RISC-V dual-core @ 400MHz + LP @ 40MHz, FPU, AI extensions, HW crypto (AES/SHA/RSA/ECC)
- **RAM:** 768KB HP SRAM + 32KB LP SRAM + 8KB TCM
- **Flash:** 32MB
- **GPIO:** 27 pins
- **USB:** USB-C (UART) + USB 2.0 OTG HS
- **Power:** 5V

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-P4** (mcu): Espressif ESP32-P4 high-performance RISC-V dual-core MCU at up to 400MHz with MIPI-DSI/CSI, H.264 encoding, USB 2.0 OTG HS, and hardware crypto. No built-in wireless radio. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-pico&source=md-export)
- **ES8311** (audio-codec): Everest Semiconductor ES8311 low-power mono audio codec with ADC and DAC, I2S digital audio interface, and I2C control at address 0x18. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdl.espressif.com%2Fdl%2Fschematics%2FAudio_ES8311.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-pico&source=md-export)
- **NS4150B** (audio-amplifier): Nsiway NS4150B filterless Class-D mono audio power amplifier driving up to 3W into 4-ohm speakers. Controlled via GPIO53 enable pin. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F1811151231_Nsiway-Tech-NS4150B_C180457.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-pico&source=md-export)
- **microphone** (microphone): Surface-mount MEMS microphone for voice input, connected via the I2S audio bus. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-P4-Pico&ref=openhardware.directory&product=waveshare-esp32-p4-pico&source=md-export)

## Protocols

- **I2C**: SDA=GPIO7, SCL=GPIO8
- **I2S**: MCLK=GPIO13, SCLK=GPIO12, ASDOUT=GPIO11, LRCK=GPIO10, DSDIN=GPIO9
- **SDIO**: CLK=GPIO43, CMD=GPIO44, D0=GPIO39, D1=GPIO40, D2=GPIO41, D3=GPIO42
- **MIPI DSI**: 2-lane display interface via FPC connector
- **MIPI CSI**: 2-lane camera interface via FPC connector
- **UART**: Via USB-C (UART0)
- **USB OTG**: USB 2.0 HS via 4-pin MX1.25 header
- **ADC**
- **GPIO**
- **PWM**
- **JTAG**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO7 | I2C SDA | — | — |
| GPIO8 | I2C SCL | — | — |
| GPIO9 | I2S DSDIN | — | — |
| GPIO10 | I2S LRCK | — | — |
| GPIO11 | I2S ASDOUT | — | — |
| GPIO12 | I2S SCLK | — | — |
| GPIO13 | I2S MCLK | — | — |
| GPIO39 | SD D0 | — | — |
| GPIO40 | SD D1 | — | — |
| GPIO41 | SD D2 | — | — |
| GPIO42 | SD D3 | — | — |
| GPIO43 | SD CLK | — | — |
| GPIO44 | SD CMD | — | — |
| GPIO53 | PA_Ctrl (NS4150B enable) | — | — |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-p4-pico.htm&ref=openhardware.directory&product=waveshare-esp32-p4-pico&source=md-export) — $10.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-p4-pico.htm&ref=openhardware.directory&product=waveshare-esp32-p4-pico&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-P4-Pico&ref=openhardware.directory&product=waveshare-esp32-p4-pico&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2FESP32-display-support%2F&ref=openhardware.directory&product=waveshare-esp32-p4-pico&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-pico&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FESP32-P4-Pico%2FESP32-P4-Pico-datasheet.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-pico&source=md-export)

## Tags

`esp32-p4`, `risc-v`, `waveshare`, `pico-form-factor`, `mipi-dsi`, `mipi-csi`, `h264`, `audio`, `hmi`, `multimedia`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-esp32-p4-pico)

---

# Waveshare ESP32-P4-WIFI6

> Pico-form-factor development board combining the ESP32-P4 RISC-V dual-core at 400MHz with an ESP32-C6 co-processor for WiFi 6 and Bluetooth 5 LE. Features 32MB PSRAM, 32MB flash, MIPI-DSI/CSI, onboard audio, microSD, and USB 2.0 OTG HS.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$13.99
- **CPU:** ESP32-P4 RISC-V dual-core @ 400MHz + LP @ 40MHz, FPU, AI extensions, HW crypto (AES/SHA/RSA/ECC)
- **RAM:** 768KB HP SRAM + 32KB LP SRAM + 8KB TCM
- **Flash:** 32MB
- **GPIO:** 27 pins
- **USB:** USB-C (UART) + USB 2.0 OTG HS
- **Power:** 5V

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-P4** (mcu): Espressif ESP32-P4 high-performance RISC-V dual-core MCU at up to 400MHz with MIPI-DSI/CSI, H.264 encoding, USB 2.0 OTG HS, and hardware crypto. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6&source=md-export)
- **ESP32-C6-MINI-1** (wireless-module): Espressif ESP32-C6-MINI-1 module providing WiFi 6 (802.11ax) 2.4GHz and Bluetooth 5 LE connectivity via SDIO interface to the ESP32-P4. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6-mini-1_mini-1u_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6&source=md-export)
- **ES8311** (audio-codec): Everest Semiconductor ES8311 low-power mono audio codec with ADC and DAC, I2S digital audio interface, and I2C control at address 0x18. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdl.espressif.com%2Fdl%2Fschematics%2FAudio_ES8311.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6&source=md-export)
- **NS4150B** (audio-amplifier): Nsiway NS4150B filterless Class-D mono audio power amplifier driving up to 3W into 4-ohm speakers. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F1811151231_Nsiway-Tech-NS4150B_C180457.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6&source=md-export)
- **microphone** (microphone): Surface-mount MEMS microphone for voice input, connected via the I2S audio bus. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-P4-WIFI6&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6&source=md-export)

## Protocols

- **I2C**: SDA=GPIO7, SCL=GPIO8
- **I2S**: MCLK=GPIO13, SCLK=GPIO12, ASDOUT=GPIO11, LRCK=GPIO10, DSDIN=GPIO9
- **SDIO**: CLK=GPIO43, CMD=GPIO44, D0=GPIO39, D1=GPIO40, D2=GPIO41, D3=GPIO42
- **MIPI DSI**: 2-lane display interface via FPC connector
- **MIPI CSI**: 2-lane camera interface via FPC connector
- **UART**: Via USB-C (UART0)
- **USB OTG**: USB 2.0 HS via 4-pin connector
- **ADC**
- **GPIO**
- **PWM**
- **JTAG**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO7 | I2C SDA | — | — |
| GPIO8 | I2C SCL | — | — |
| GPIO9 | I2S DSDIN | — | — |
| GPIO10 | I2S LRCK | — | — |
| GPIO11 | I2S ASDOUT | — | — |
| GPIO12 | I2S SCLK | — | — |
| GPIO13 | I2S MCLK | — | — |
| GPIO39 | SD D0 | — | — |
| GPIO40 | SD D1 | — | — |
| GPIO41 | SD D2 | — | — |
| GPIO42 | SD D3 | — | — |
| GPIO43 | SD CLK | — | — |
| GPIO44 | SD CMD | — | — |
| GPIO53 | PA_Ctrl (NS4150B enable) | — | — |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-p4-wifi6.htm&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6&source=md-export) — $13.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-p4-wifi6.htm&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-P4-WIFI6&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2FESP32-display-support%2F&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FESP32-P4-WIFI6%2FESP32-P4-WIFI6-datasheet.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6&source=md-export)

## Tags

`esp32-p4`, `risc-v`, `waveshare`, `wifi6`, `bluetooth-5`, `esp32-c6`, `pico-form-factor`, `mipi-dsi`, `mipi-csi`, `h264`, `audio`, `hmi`, `multimedia`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-esp32-p4-wifi6)

---

# Waveshare ESP32-P4-WIFI6-POE-ETH

> ESP32-P4 development board with WiFi 6 and Bluetooth 5 LE via ESP32-C6, 100Mbps PoE Ethernet via IP101GRI, IPEX external antenna, USB Type-A OTG HS, 32MB PSRAM, 16MB flash, MIPI-DSI/CSI, onboard audio, and 28 GPIOs.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$24.99
- **CPU:** ESP32-P4 RISC-V dual-core @ 400MHz + LP @ 40MHz, FPU, AI extensions, HW crypto (AES/SHA/RSA/ECC)
- **RAM:** 768KB HP SRAM + 32KB LP SRAM + 8KB TCM
- **Flash:** 16MB
- **GPIO:** 28 pins
- **USB:** USB Type-A (OTG HS) + USB-C (UART)
- **Power:** 5V via USB-C or PoE

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.0 | Ethernet 10/100 Mbps

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-P4** (mcu): Espressif ESP32-P4 high-performance RISC-V dual-core MCU at up to 400MHz with MIPI-DSI/CSI, H.264 encoding, USB 2.0 OTG HS, and hardware crypto. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-poe-eth&source=md-export)
- **ESP32-C6-MINI-1** (wireless-module): Espressif ESP32-C6-MINI-1U-H8 module with IPEX 3rd gen antenna connector for external 2.4GHz antenna, providing WiFi 6 and Bluetooth 5 LE via SDIO. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6-mini-1_mini-1u_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-poe-eth&source=md-export)
- **IP101GRI** (ethernet-phy): IC Plus IP101GRI single-port 10/100 Fast Ethernet PHY with RMII interface for the onboard RJ45 port with PoE support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F1811081445_IC-Plus-IP101GRI_C82105.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-poe-eth&source=md-export)
- **ES8311** (audio-codec): Everest Semiconductor ES8311 mono audio codec with ADC and DAC, I2S interface, and I2C control at address 0x18. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdl.espressif.com%2Fdl%2Fschematics%2FAudio_ES8311.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-poe-eth&source=md-export)
- **NS4150B** (audio-amplifier): Nsiway NS4150B filterless Class-D mono audio power amplifier driving up to 3W into 4-ohm speakers. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F1811151231_Nsiway-Tech-NS4150B_C180457.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-poe-eth&source=md-export)
- **microphone** (microphone): Surface-mount MEMS microphone for voice input, connected via the I2S audio bus. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-P4-WIFI6-POE-ETH&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-poe-eth&source=md-export)

## Protocols

- **I2C**: SDA=GPIO7, SCL=GPIO8 (SH1.0 header)
- **I2S**: MCLK=GPIO13, SCLK=GPIO12, ASDOUT=GPIO11, LRCK=GPIO10, DSDIN=GPIO9
- **SDIO**: CLK=GPIO43, CMD=GPIO44, D0=GPIO39, D1=GPIO40, D2=GPIO41, D3=GPIO42
- **MIPI DSI**: 2-lane display interface
- **MIPI CSI**: 2-lane camera interface
- **UART**: Via USB-C + SH1.0 header
- **USB OTG**: USB Type-A 2.0 HS
- **ADC**
- **GPIO**
- **PWM**
- **JTAG**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO7 | I2C SDA | — | — |
| GPIO8 | I2C SCL | — | — |
| GPIO9 | I2S DSDIN | — | — |
| GPIO10 | I2S LRCK | — | — |
| GPIO11 | I2S ASDOUT | — | — |
| GPIO12 | I2S SCLK | — | — |
| GPIO13 | I2S MCLK | — | — |
| GPIO28 | ETH CRS_DV | — | — |
| GPIO29 | ETH RXD0 | — | — |
| GPIO30 | ETH RXD1 | — | — |
| GPIO31 | ETH MDC | — | — |
| GPIO34 | ETH TXD0 | — | — |
| GPIO35 | ETH TXD1 | — | — |
| GPIO39 | SD D0 | — | — |
| GPIO40 | SD D1 | — | — |
| GPIO41 | SD D2 | — | — |
| GPIO42 | SD D3 | — | — |
| GPIO43 | SD CLK | — | — |
| GPIO44 | SD CMD | — | — |
| GPIO49 | ETH TX_EN | — | — |
| GPIO50 | ETH REF_CLK | — | — |
| GPIO51 | ETH RESET | — | — |
| GPIO52 | ETH MDIO | — | — |
| GPIO53 | PA_Ctrl (NS4150B enable) | — | — |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-p4-wifi6-poe-eth.htm&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-poe-eth&source=md-export) — $24.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-p4-wifi6-poe-eth.htm&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-poe-eth&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-P4-WIFI6-POE-ETH&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-poe-eth&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2FESP32-display-support%2F&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-poe-eth&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-poe-eth&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-P4-WIFI6-POE-ETH&ref=openhardware.directory&product=waveshare-esp32-p4-wifi6-poe-eth&source=md-export)

## Tags

`esp32-p4`, `risc-v`, `waveshare`, `wifi6`, `bluetooth-5`, `esp32-c6`, `ethernet`, `poe`, `ipex`, `mipi-dsi`, `mipi-csi`, `h264`, `audio`, `hmi`, `multimedia`, `development-board`, `ip101`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-esp32-p4-wifi6-poe-eth)

---

# ESP32-S2 HMI DevKit 1

> Espressif ESP32-S2-WROVER HMI development kit with a 4.3″ 800×480 capacitive touchscreen, onboard IMU, microphone, speaker, microSD, IR, and RGB LEDs — designed for smart-home panel prototyping.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$79.95
- **CPU:** Xtensa LX7 single-core @ 240 MHz (ESP32-S2-WROVER)
- **RAM:** 320 KB SRAM + 2 MB PSRAM
- **Flash:** 4MB
- **Power:** 5V

## Connectivity

WiFi 2.4GHz 802.11 b/g/n

## Compatible Firmware

- esp-idf

## Components

- **ESP32-S2-WROVER** (mcu): Espressif ESP32-S2-WROVER module with single-core 240 MHz Xtensa LX7, 320 KB SRAM, 4 MB Flash, 2 MB PSRAM, and 2.4 GHz WiFi. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2-wrover_esp32-s2-wrover-i_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s2-hmi-devkit-1&source=md-export)
- **MPU-6886** (sensor): InvenSense MPU-6886 6-axis IMU providing 3-axis accelerometer and 3-axis gyroscope for orientation sensing. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fwp-content%2Fuploads%2F2015%2F02%2FMPU-6500-Datasheet2.pdf&ref=openhardware.directory&product=esp32-s2-hmi-devkit-1&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO35, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**
- **CAN**: TX=GPIO1, RX=GPIO2

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO3 | SDA (I2C) | — | I2C, GPIO |
| GPIO4 | SCL (I2C) | — | I2C, GPIO |
| GPIO35 | MOSI (SPI) | — | SPI |
| GPIO36 | MISO (SPI) | — | SPI |
| GPIO37 | SCK (SPI) | — | SPI |
| GPIO43 | TX | — | UART |
| GPIO44 | RX | — | UART |
| GPIO1 | TWAI_TX (CAN) | — | CAN |
| GPIO2 | TWAI_RX (CAN) | — | CAN |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5207&ref=openhardware.directory&product=esp32-s2-hmi-devkit-1&source=md-export) — 79.95

## Available Software

- [ESP-IDF](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.espressif.com%2Fprojects%2Fesp-idf%2F&ref=openhardware.directory&product=esp32-s2-hmi-devkit-1&source=md-export)
- [ESP-HMI (ESP-UI)](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-idf&ref=openhardware.directory&product=esp32-s2-hmi-devkit-1&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5207&ref=openhardware.directory&product=esp32-s2-hmi-devkit-1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp32-s2-hmi-reference-design&ref=openhardware.directory&product=esp32-s2-hmi-devkit-1&source=md-export)

## Tags

`esp32-s2`, `hmi`, `touchscreen`, `4.3-inch`, `lcd`, `smart-home`, `esp-idf`, `microsd`

---
[View full device page](https://openhardware.directory/s/1370/esp32-s2-hmi-devkit-1)

---

# Waveshare ESP32-S3 Touch LCD 3.49

> ESP32-S3 dev board with 3.49" capacitive touch IPS display, dual microphone array, 6-axis IMU, RTC, and battery support. Ideal for wearable UIs and compact IoT dashboards.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$33.95
- **CPU:** ESP32-S3R8
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** Type-C
- **Power:** 5V

## Connectivity

WiFi 2.4GHz 802.11b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- micropython
- lvgl

## Components

- **ESP32-S3R8** (MCU): Xtensa LX7 dual-core processor at 240MHz with integrated WiFi and Bluetooth 5.0 LE, 512KB SRAM and 8MB stacked PSRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)
- **3.49" IPS LCD (AXS15231B)** (Display): 172x640 IPS LCD with 16.7M colors, 350 cd/m² brightness, 1200:1 contrast, driven via QSPI interface with I2C capacitive touch — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-S3-Touch-LCD-3.49&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)
- **QMI8658** (IMU): 3-axis accelerometer and 3-axis gyroscope for motion sensing and orientation detection — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.qstcorp.com%2Fupload%2Fpdf%2F202202%2FQMI8658A%2520Datasheet%2520Rev%2520A.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)
- **PCF85063** (RTC): Low-power I2C real-time clock/calendar chip for accurate timekeeping with battery backup support — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FPCF85063A.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)
- **ES8311** (Audio DAC): Low-power mono audio codec with integrated DAC for speaker output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.everest-semi.com%2Fpdf%2FES8311%2520PB.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)
- **ES7210** (Audio ADC): High-performance 4-channel audio ADC for dual microphone array input with noise reduction — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.everest-semi.com%2Fpdf%2FES7210%2520PB.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)
- **TCA9554PWR** (GPIO Expander): 8-bit I2C-bus and SMBus I/O expander providing additional GPIO pins — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftca9554.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **QSPI**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwaveshare-esp32-s3-touch-lcd&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export) — $33.95
- [Waveshare Official](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-touch-lcd-3.49.htm&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export) — $33.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-touch-lcd-3.49.htm&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-S3-Touch-LCD-3.49&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2FESP32-S3-Touch-LCD-3.49&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-3-49&source=md-export)

## Tags

`esp32-s3`, `touch-display`, `ips-lcd`, `imu`, `rtc`, `audio`, `battery`, `waveshare`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-esp32-s3-touch-lcd-3-49)

---

# ESP32-S3 Box Lite

> Espressif AIoT dev kit — ESP32-S3, 2.4″ 320×240 display, dual MEMS microphones, speaker, 16 MB Flash, 8 MB PSRAM, WiFi, BLE 5, Pmod expansion — the dock-free Lite sibling of the ESP32-S3 Box.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$35
- **CPU:** Xtensa LX7 dual-core @ 240 MHz (ESP32-S3)
- **RAM:** 512 KB SRAM + 8 MB PSRAM
- **Flash:** 16MB
- **Power:** 5V

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- esp-idf
- arduino
- micropython

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core 240 MHz Xtensa LX7 with 512 KB SRAM, 8 MB Octal PSRAM, vector AI instructions, native USB, WiFi, and BLE 5. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s3-box-lite&source=md-export)
- **Dual MEMS Microphone** (microphone): Dual far-field MEMS microphones for offline voice wake-up and command recognition in English and Chinese. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s3-box-lite&source=md-export)

## Protocols

- **I2C**: SDA=GPIO1, SCL=GPIO2
- **SPI**: MOSI=GPIO35, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | SDA (I2C) | — | I2C, GPIO |
| GPIO2 | SCL (I2C) | — | I2C, GPIO |
| GPIO35 | MOSI (SPI) | — | SPI |
| GPIO36 | MISO (SPI) | — | SPI |
| GPIO37 | SCK (SPI) | — | SPI |
| GPIO43 | TX | — | UART |
| GPIO44 | RX | — | UART |
| GPIO3 | I2S_WS | — | I2S, GPIO |
| GPIO6 | I2S_DOUT | — | I2S, GPIO |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5511&ref=openhardware.directory&product=esp32-s3-box-lite&source=md-export) — 35

## Available Software

- [ESP-IDF](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.espressif.com%2Fprojects%2Fesp-idf%2F&ref=openhardware.directory&product=esp32-s3-box-lite&source=md-export)
- [ESP-BOX Firmware](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-box&ref=openhardware.directory&product=esp32-s3-box-lite&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5511&ref=openhardware.directory&product=esp32-s3-box-lite&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-box&ref=openhardware.directory&product=esp32-s3-box-lite&source=md-export)

## Tags

`esp32-s3`, `esp-box-lite`, `aiiot`, `touchscreen`, `voice-recognition`, `smart-home`, `esp-idf`, `pmod`

---
[View full device page](https://openhardware.directory/s/1370/esp32-s3-box-lite)

---

# ESP32-S3 Korvo 2 Audio Dev Board

> Espressif audio and multimedia development board with ESP32-S3, dual-microphone array for far-field wake-word detection, camera support, LCD interface, microSD, and Wi-Fi + BLE.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$49.95
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **Power:** 5V via Micro-USB

## Connectivity

WiFi 802.11b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- ESP-ADF
- esp-idf

## Components

- **ESP32-S3** (mcu): Dual-core Xtensa LX7 240 MHz, AI acceleration, Wi-Fi + BT5 LE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s3-korvo-2&source=md-export)
- **Dual Microphone Array** (microphone): Two MEMS microphones for near/far-field wake-word detection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fespressif-docs.readthedocs-hosted.com%2Fprojects%2Fesp-adf%2Fen%2Flatest%2Fdesign-guide%2Fdev-boards%2Fuser-guide-esp32-s3-korvo-2.html&ref=openhardware.directory&product=esp32-s3-korvo-2&source=md-export)

## Protocols

- **I2C**: SDA=GPIO10, SCL=GPIO11
- **SPI**: MOSI=GPIO13, MISO=GPIO9, SCK=GPIO12, CS=GPIO14
- **UART**: TX=GPIO43, RX=GPIO44
- **I2S**: BCLK=GPIO0, WS=GPIO2, DOUT=GPIO3
- **SDIO**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | I2S BCLK | — | i2s, digital |
| GPIO2 | I2S WS | — | i2s, digital |
| GPIO3 | I2S DOUT | — | i2s, digital |
| GPIO5 | D5 | — | digital |
| GPIO6 | D6 | — | digital |
| GPIO7 | D7 | — | digital |
| GPIO8 | D8 | — | digital |
| GPIO9 | SPI MISO | — | spi-miso, digital |
| GPIO10 | SDA | — | i2c-sda, digital |
| GPIO11 | SCL | — | i2c-scl, digital |
| GPIO12 | SPI SCK | — | spi-sck, digital |
| GPIO13 | SPI MOSI | — | spi-mosi, digital |
| GPIO14 | SPI CS | — | spi-cs, digital |
| GPIO43 | TX | — | uart-tx, digital |
| GPIO44 | RX | — | uart-rx, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5829&ref=openhardware.directory&product=esp32-s3-korvo-2&source=md-export) — 49.95

## Available Software

- [ESP-ADF](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-adf&ref=openhardware.directory&product=esp32-s3-korvo-2&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5829&ref=openhardware.directory&product=esp32-s3-korvo-2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-adf&ref=openhardware.directory&product=esp32-s3-korvo-2&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Fespressif-docs.readthedocs-hosted.com%2Fprojects%2Fesp-adf%2Fen%2Flatest%2Fdesign-guide%2Fdev-boards%2Fuser-guide-esp32-s3-korvo-2.html&ref=openhardware.directory&product=esp32-s3-korvo-2&source=md-export)

## Tags

`esp32-s3`, `espressif`, `audio`, `voice-assistant`, `microphone`, `camera`, `esp-adf`, `ai`

---
[View full device page](https://openhardware.directory/s/1370/esp32-s3-korvo-2)

---

# LILYGO T-Watch S3

> Open-source ESP32-S3 smartwatch with LoRa, 1.3" 240×240 IPS touchscreen, haptic feedback, accelerometer, speaker, microphone, IR transmitter, and 1500mAh battery. Supports Meshtastic, ESPHome, Arduino, and MicroPython.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** smartwatch
- **Price:** ~$42.98
- **CPU:** Xtensa LX7 dual-core @ 240MHz, vector AI, hardware crypto
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** Micro-USB
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- esphome
- meshtastic
- platformio

## Components

- **ESP32-S3FN16R8** (mcu): Espressif ESP32-S3FN16R8 dual-core Xtensa LX7 @ 240MHz with 16MB flash, 8MB PSRAM, WiFi 802.11 b/g/n, BLE 5.0, USB OTG, vector AI instructions, and hardware crypto (AES-XTS, RSA, SHA). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fen%2Fproducts%2Fsocs%2Fesp32-s3&ref=openhardware.directory&product=lilygo-t-watch-s3&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver supporting 150–960MHz (433/868/915MHz variants) with +22 dBm output power, -148 dBm sensitivity, and ultra-low 4.2mA receive current. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=lilygo-t-watch-s3&source=md-export)
- **AXP2101** (power-management): X-Powers AXP2101 highly integrated PMIC managing LiPo battery charging (up to 1024mA programmable), multiple DC-DC converters, and LDO rails powering the ESP32-S3, display, LoRa, haptic driver, and RTC backup. — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.x-powers.com%2Fen.php%2FInfo%2Fproduct_detail%2Farticle_id%2F95&ref=openhardware.directory&product=lilygo-t-watch-s3&source=md-export)
- **BMA423** (accelerometer): Bosch BMA423 3-axis accelerometer with hardware step counting, activity recognition (walk/run/still), wrist-tilt detection, tap detection for display wake, and I2C interface at ultra-low power. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2Fdatasheet%2F2%2F783%2FBSCH_S_A0010021471_1-2525113.pdf&ref=openhardware.directory&product=lilygo-t-watch-s3&source=md-export)
- **DRV2605** (haptic): Texas Instruments DRV2605 I2C haptic driver supporting both ERM and LRA vibration motors with 100+ licensed Immersion TouchSense effects and smart-loop auto-resonance tracking. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FDRV2605&ref=openhardware.directory&product=lilygo-t-watch-s3&source=md-export)
- **SPM1423HM4H-B** (microphone): Knowles SPM1423HM4H-B PDM MEMS microphone with high SNR, low current consumption, and digital PDM output for voice capture, audio recording, and voice assistant applications. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fmedia.digikey.com%2Fpdf%2FData%2520Sheets%2FKnowles%2520Acoustics%2520PDFs%2FSPM1423HM4H-B.pdf&ref=openhardware.directory&product=lilygo-t-watch-s3&source=md-export)
- **MAX98357A** (audio-amplifier): Analog Devices MAX98357A I2S Class-D mono amplifier delivering 3.2W into 4Ω with no external MCLK required, enabling audio output directly from the ESP32-S3's I2S peripheral. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fen%2Fproducts%2Fmax98357a.html&ref=openhardware.directory&product=lilygo-t-watch-s3&source=md-export)
- **ST7789V3** (display-driver): Sitronix ST7789V3 TFT LCD controller driving the 1.3-inch 240×240 IPS panel via SPI at 262K colors, 450 cd/m² brightness, and 800:1 contrast ratio. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.newhavendisplay.com%2Fappnotes%2Fdatasheets%2FLCDs%2FST7789V3.pdf&ref=openhardware.directory&product=lilygo-t-watch-s3&source=md-export)
- **FT6336U** (touch-controller): FocalTech FT6336U single-channel capacitive touch controller with I2C interface, swipe and tap gesture recognition, and interrupt-driven wake — connected on a dedicated I2C bus (Wire1). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fbuydisplay.com%2Fdownload%2Fic%2FFT6236-FT6336-FT6436L-FT6436_Datasheet.pdf&ref=openhardware.directory&product=lilygo-t-watch-s3&source=md-export)
- **PCF8563** (rtc): NXP PCF8563 nano-power I2C real-time clock with integrated 32.768 kHz crystal, alarm function, and battery backup via AXP2101 VBACKUP rail for accurate timekeeping across power cycles. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fproducts%2FPCF8563&ref=openhardware.directory&product=lilygo-t-watch-s3&source=md-export)
- **IR12-21C** (ir-transmitter): Everlight IR12-21C 940nm surface-mount infrared LED transmitter driven by GPIO2 for sending IR remote control signals to TVs, air conditioners, and other IR-controlled home appliances. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.everlight-led.cn%2Fzh%2Fdatasheet-download%2Fitem%2Fir12-21c-tr8-datasheet&ref=openhardware.directory&product=lilygo-t-watch-s3&source=md-export)

## Protocols

- **I2C** (Wire0): SDA=GPIO10, SCL=GPIO11
- **I2C** (Wire1 (Touch)): SDA=GPIO39, SCL=GPIO40
- **SPI** (LoRa): SCK=GPIO3, MISO=GPIO4, MOSI=GPIO1, CS=GPIO5
- **SPI** (Display): SCK=GPIO18, MOSI=GPIO13, CS=GPIO12, DC=GPIO38
- **I2S** (Speaker): BCLK=GPIO48, WCLK=GPIO15, DOUT=GPIO46
- **PDM** (Microphone): SCK=GPIO44, DATA=GPIO47

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | LoRa MOSI | — | digital-input, digital-output |
| GPIO2 | IR Transmitter | — | digital-output, pwm |
| GPIO3 | LoRa SCK | — | digital-input, digital-output |
| GPIO4 | LoRa MISO | — | digital-input, digital-output |
| GPIO5 | LoRa CS | — | digital-input, digital-output |
| GPIO7 | LoRa BUSY | — | digital-input |
| GPIO8 | LoRa RESET | — | digital-output |
| GPIO9 | LoRa IRQ | — | digital-input |
| GPIO10 | I2C SDA | — | digital-input, digital-output |
| GPIO11 | I2C SCL | — | digital-output |
| GPIO12 | Display CS | — | digital-output |
| GPIO13 | Display MOSI | — | digital-output |
| GPIO14 | BMA423 INT | — | digital-input |
| GPIO15 | I2S WCLK (Speaker) | — | digital-output |
| GPIO16 | Touch INT | — | digital-input |
| GPIO17 | RTC INT | — | digital-input |
| GPIO18 | Display SCK | — | digital-output |
| GPIO21 | AXP2101 INT | — | digital-input |
| GPIO38 | Display DC | — | digital-output |
| GPIO39 | Touch SDA (Wire1) | — | digital-input, digital-output |
| GPIO40 | Touch SCL (Wire1) | — | digital-output |
| GPIO44 | PDM SCK (Microphone) | — | digital-output |
| GPIO45 | Display Backlight | — | digital-output, pwm |
| GPIO46 | I2S DOUT (Speaker) | — | digital-output |
| GPIO47 | PDM DATA (Microphone) | — | digital-input |
| GPIO48 | I2S BCLK (Speaker) | — | digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-watch-s3&ref=openhardware.directory&product=lilygo-t-watch-s3&source=md-export) — $42.98

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-watch-s3&ref=openhardware.directory&product=lilygo-t-watch-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGoLib&ref=openhardware.directory&product=lilygo-t-watch-s3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-watch-s3&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGoLib%2Fblob%2Fmaster%2Fschematic%2FT_WATCH-S3%252025-03-24.pdf&ref=openhardware.directory&product=lilygo-t-watch-s3&source=md-export)

## Tags

`esp32-s3`, `smartwatch`, `lora`, `meshtastic`, `esphome`, `wearable`, `iot`, `lilygo`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-watch-s3)

---

# ESP32-S3 Box

> Espressif AIoT development kit with ESP32-S3, a 2.4″ 320×240 capacitive touchscreen, dual microphones, speaker, 16 MB Flash, 8 MB PSRAM, WiFi, BLE 5, and Pmod expansion.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$49.95
- **CPU:** Xtensa LX7 dual-core @ 240 MHz (ESP32-S3)
- **RAM:** 512 KB SRAM + 8 MB PSRAM
- **Flash:** 16MB
- **Power:** 5V

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- esp-idf
- arduino
- micropython

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core 240 MHz Xtensa LX7 with 512 KB SRAM, vector AI instructions, native USB OTG, 2.4 GHz WiFi, and BLE 5. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s3-box&source=md-export)
- **Microphone (dual MEMS)** (microphone): Dual far-field MEMS microphones for offline voice wake-up and command recognition. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s3-box&source=md-export)

## Protocols

- **I2C**: SDA=GPIO1, SCL=GPIO2
- **SPI**: MOSI=GPIO35, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | SDA (I2C) | — | I2C, GPIO |
| GPIO2 | SCL (I2C) | — | I2C, GPIO |
| GPIO35 | MOSI (SPI) | — | SPI |
| GPIO36 | MISO (SPI) | — | SPI |
| GPIO37 | SCK (SPI) | — | SPI |
| GPIO43 | TX | — | UART |
| GPIO44 | RX | — | UART |
| GPIO2 | I2S_CLK | — | I2S, GPIO |
| GPIO3 | I2S_WS | — | I2S, GPIO |
| GPIO6 | I2S_DOUT | — | I2S, GPIO |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5290&ref=openhardware.directory&product=esp32-s3-box&source=md-export) — 49.95

## Available Software

- [ESP-IDF](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.espressif.com%2Fprojects%2Fesp-idf%2F&ref=openhardware.directory&product=esp32-s3-box&source=md-export)
- [ESP-BOX Factory Firmware](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-box&ref=openhardware.directory&product=esp32-s3-box&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5290&ref=openhardware.directory&product=esp32-s3-box&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-box&ref=openhardware.directory&product=esp32-s3-box&source=md-export)

## Tags

`esp32-s3`, `esp-box`, `aiiot`, `touchscreen`, `voice-recognition`, `smart-home`, `esp-idf`, `pmod`

---
[View full device page](https://openhardware.directory/s/1370/esp32-s3-box)

---

# Sonoff NSPanel

> ESP32-based smart wall switch with 3.5-inch capacitive touchscreen, dual relay outputs, temperature sensor, and buzzer. Flashable with Tasmota for custom LVGL/Berry interfaces and Home Assistant integration.

## Quick Facts

- **Brand:** Sonoff
- **Board Type:** smart-switch
- **Price:** ~$49.9
- **CPU:** ESP32-D0WDQ6
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **Power:** 100-240V AC

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- eWeLink
- tasmota
- esphome

## Components

- **ESP32-D0WDQ6** (Microcontroller): Dual-core Xtensa LX6 microcontroller at 240MHz with integrated WiFi 802.11 b/g/n and Bluetooth 4.2, 520KB SRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=sonoff-nspanel&source=md-export)
- **ILI9488** (Display Controller): TFT LCD single-chip driver for 480×320 resolution color display with 16.7M colors and SPI interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FILI9488.pdf&ref=openhardware.directory&product=sonoff-nspanel&source=md-export)
- **FT6336U** (Touch Controller): Self-capacitive touch panel controller supporting up to 2 simultaneous touch points with I2C interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffocuslcds.com%2Fcontent%2FFT6336.pdf&ref=openhardware.directory&product=sonoff-nspanel&source=md-export)
- **STM32G030F6** (Co-Processor): ARM Cortex-M0+ co-processor handling display rendering and Nextion-compatible serial protocol communication — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32g030f6.pdf&ref=openhardware.directory&product=sonoff-nspanel&source=md-export)
- **2x 2A Relay** (Relay): Two independent single-pole relays rated at 2A for light switching, controlled via ESP32 GPIOs — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fcentral-control-panel%2Fnspanel%2F&ref=openhardware.directory&product=sonoff-nspanel&source=md-export)
- **NTC Thermistor** (Sensor): NTC thermistor providing room temperature readings for climate monitoring and thermostat automation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fcentral-control-panel%2Fnspanel%2F&ref=openhardware.directory&product=sonoff-nspanel&source=md-export)
- **Piezo Buzzer** (Audio): Piezoelectric buzzer for audible touch feedback, alarms, and notification sounds — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fcentral-control-panel%2Fnspanel%2F&ref=openhardware.directory&product=sonoff-nspanel&source=md-export)

## Protocols

- **WiFi 802.11 b/g/n**
- **Bluetooth 4.2**
- **UART**
- **MQTT**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fcentral-control-panel%2Fnspanel%2F&ref=openhardware.directory&product=sonoff-nspanel&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Ftemplates.blakadder.com%2Fsonoff_NSPanel.html&ref=openhardware.directory&product=sonoff-nspanel&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FjoBr99%2Fnspanel-lovelace-ui&ref=openhardware.directory&product=sonoff-nspanel&source=md-export)

## Tags

`esp32`, `tasmota`, `touchscreen`, `home-automation`, `wall-switch`, `display`, `berry`, `lvgl`, `home-assistant`, `sonoff`

---
[View full device page](https://openhardware.directory/s/1370/sonoff-nspanel)

---

# M5Stack CoreS3

> Third-generation M5Stack Core with ESP32-S3 dual-core 240MHz, 2.0\" capacitive touch IPS display, GC0308 camera, dual microphones, 1W speaker, BMI270 IMU, BMM150 magnetometer, proximity sensor, RTC, 500mAh battery, and DinBase for mounting.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$72.6
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C (OTG)
- **Power:** 5V USB-C or DC 9-24V (via DinBase) or 500mAh LiPo
- **Dimensions:** 54 × 54 × 16mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- uiflow
- micropython

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core Xtensa LX7 at 240MHz with 16MB flash, 8MB PSRAM, WiFi 802.11 b/g/n and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-cores3&source=md-export)
- **ILI9342C** (display-driver): ILI9342C TFT controller driving the 2.0-inch 320×240 IPS capacitive touchscreen with hardened glass. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.buydisplay.com%2Fdownload%2Fic%2FILI9342C-DS.pdf&ref=openhardware.directory&product=m5stack-cores3&source=md-export)
- **GC0308** (camera): GalaxyCore GC0308 VGA (640×480) CMOS image sensor for embedded camera and vision applications. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5CoreS3%2Fblob%2Fmain%2Fdocs%2Fdatasheet%2FGC0308.pdf&ref=openhardware.directory&product=m5stack-cores3&source=md-export)
- **AW88298** (audio-amplifier): Awinic AW88298 digital I2S input Class-D amplifier with integrated DSP, driving the built-in 1W speaker. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.awinic.com%2Fen%2FproductDetail%2FAW88298&ref=openhardware.directory&product=m5stack-cores3&source=md-export)
- **ES7210** (audio-adc): Everest Semiconductor ES7210 high-performance quad-channel audio ADC capturing input from dual MEMS microphones. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5CoreS3%2Fblob%2Fmain%2Fdocs%2Fdatasheet%2FES7210.pdf&ref=openhardware.directory&product=m5stack-cores3&source=md-export)
- **BMI270** (accelerometer): Bosch BMI270 ultra-low-power 6-axis inertial measurement unit with accelerometer and gyroscope. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bmi270-ds000.pdf&ref=openhardware.directory&product=m5stack-cores3&source=md-export)
- **BMM150** (magnetometer): Bosch BMM150 3-axis digital magnetometer for compass heading and magnetic field measurement. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bmm150-ds001.pdf&ref=openhardware.directory&product=m5stack-cores3&source=md-export)
- **LTR-553ALS-WA** (proximity-sensor): Lite-On LTR-553ALS-WA integrated proximity and ambient light sensor with I2C interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Foptoelectronics.liteon.com%2Fupload%2Fdownload%2FDS86-2014-0007%2FLTR-553ALS-WA_DS.pdf&ref=openhardware.directory&product=m5stack-cores3&source=md-export)
- **BM8563** (rtc): BM8563 RTC with I2C interface, alarm, and timer functions for timekeeping and sleep scheduling. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2305061436_GATEMODE-BM8563EMA_C5129976.pdf&ref=openhardware.directory&product=m5stack-cores3&source=md-export)
- **AXP2101** (battery-charger): X-Powers AXP2101 advanced PMIC with multi-rail LDO outputs, LiPo charging, and fuel gauge for the 500mAh battery. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5CoreS3%2Fblob%2Fmain%2Fdocs%2Fdatasheet%2FAXP2101.pdf&ref=openhardware.directory&product=m5stack-cores3&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **I2S**
- **Grove**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stack-cores3-esp32s3&ref=openhardware.directory&product=m5stack-cores3&source=md-export) — €66.55
- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stack-cores3-esp32s3-iot-development-kit&ref=openhardware.directory&product=m5stack-cores3&source=md-export) — $49.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FCoreS3&ref=openhardware.directory&product=m5stack-cores3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5CoreS3&ref=openhardware.directory&product=m5stack-cores3&source=md-export)

## Tags

`esp32-s3`, `m5stack`, `touchscreen`, `camera`, `imu`, `speaker`, `microphone`, `grove`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-cores3)

---

# Adafruit MagTag

> The Adafruit MagTag is an ESP32-S2 WiFi e-paper IoT display board featuring a 2.9" 296×128 grayscale e-ink screen, 4 NeoPixels, LIS3DH accelerometer, 4 user buttons, STEMMA QT, USB-C, LiPo charging, and a deep-sleep current of ~250µA — ideal for low-power battery-driven IoT displays.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$34.95
- **CPU:** Xtensa LX7 single-core @ 240MHz (ESP32-S2)
- **RAM:** 320 KB SRAM
- **Flash:** 4MB
- **Power:** 5V via USB-C or LiPo 3.7V (JST connector)

## Connectivity

WiFi 802.11 b/g/n (ESP32-S2 native)

## Compatible Firmware

- circuitpython
- arduino
- esphome
- esp-idf

## Components

- **ESP32-S2 (WROVER)** (mcu): Espressif ESP32-S2 single-core Xtensa LX7 at 240MHz with native USB OTG, 320KB SRAM, 4MB flash, 2MB PSRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-magtag&source=md-export)
- **SSD1680** (display-driver): Solomon Systech SSD1680 e-paper display controller for 2.9" grayscale 296×128 panel — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F4800%2F4800_SSD1680.pdf&ref=openhardware.directory&product=adafruit-magtag&source=md-export)
- **LIS3DH** (sensor): ST Microelectronics LIS3DH 3-axis MEMS accelerometer for orientation and wake-from-sleep — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flis3dh.pdf&ref=openhardware.directory&product=adafruit-magtag&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **UART**: TX=GPIO43, RX=GPIO44
- **WiFi 802.11 b/g/n**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO3 | SDA — STEMMA QT I2C Data | — | digital-input, digital-output |
| GPIO4 | SCL — STEMMA QT I2C Clock | — | digital-input, digital-output |
| GPIO43 | TX — UART Transmit | — | digital-input, digital-output |
| GPIO44 | RX — UART Receive | — | digital-input, digital-output |
| GPIO9 | D9 / STEMMA JST 1 | — | digital-input, digital-output |
| GPIO10 | D10 / STEMMA JST 2 | — | digital-input, digital-output |
| GPIO11 | BTN A — Button / Wake | — | digital-input |
| GPIO12 | BTN B — Button / Wake | — | digital-input |
| GPIO13 | BTN C — Button / Wake | — | digital-input |
| GPIO14 | BTN D — Button / Wake | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4800&ref=openhardware.directory&product=adafruit-magtag&source=md-export) — $34.95
- [Adafruit (Starter Kit)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4819&ref=openhardware.directory&product=adafruit-magtag&source=md-export) — $44.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4800&ref=openhardware.directory&product=adafruit-magtag&source=md-export)
- [docs](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-magtag&ref=openhardware.directory&product=adafruit-magtag&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_MagTag_Library&ref=openhardware.directory&product=adafruit-magtag&source=md-export)

## Tags

`adafruit`, `magtag`, `e-paper`, `e-ink`, `esp32-s2`, `circuitpython`, `wifi`, `low-power`, `iot-display`, `neopixel`

## Certifications

FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/adafruit-magtag)

---

# LILYGO T-Bao

> Dual-MCU development board combining ESP32 and KENDRYTE K210 RISC-V AI processor with OV2640 camera, 1.54" IPS touchscreen, I2S audio amplifier, motor driver, 6-axis IMU, and Wi-Fi for edge AI and robotics prototyping.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$80.69
- **CPU:** ESP32-D0WDQ6-V3 + K210 RISC-V Dual-Core 64-bit
- **Flash:** 16MB
- **USB:** Micro-USB
- **Power:** 5V
- **Dimensions:** 53 x 64mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython

## Components

- **ESP32-D0WDQ6-V3** (mcu): Xtensa LX6 dual-core 240MHz ESP32 with 16MB Flash, 8MB PSRAM, Wi-Fi and Bluetooth 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-bao&source=md-export)
- **K210** (mcu): KENDRYTE K210 RISC-V dual-core 64-bit processor at 400MHz with FPU and KPU for face recognition and neural network inference — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fs3.cn-north-1.amazonaws.com.cn%2Fdl.kendryte.com%2Fdocuments%2Fkendryte_datasheet_20181011163248_en.pdf&ref=openhardware.directory&product=lilygo-t-bao&source=md-export)
- **OV2640** (camera): 2MP CMOS camera sensor supporting QVGA@60fps and VGA@30fps for face recognition and video capture — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2Fcam_module%2FOV2640DS.pdf&ref=openhardware.directory&product=lilygo-t-bao&source=md-export)
- **ST7789** (display-driver): 1.54-inch 240x240 IPS LCD driver with capacitive touch support — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rhydolabz.com%2Fdocuments%2F33%2FST7789.pdf&ref=openhardware.directory&product=lilygo-t-bao&source=md-export)
- **MAX98357A** (other): I2S digital audio amplifier outputting 3.2W at 4Ω for speaker drive — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX98357A-MAX98357B.pdf&ref=openhardware.directory&product=lilygo-t-bao&source=md-export)
- **MPU6050** (accelerometer): 6-axis gyroscope and accelerometer with onboard DMP for motion sensing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fwp-content%2Fuploads%2F2015%2F02%2FMPU-6000-Datasheet1.pdf&ref=openhardware.directory&product=lilygo-t-bao&source=md-export)
- **DRV8833** (other): Dual H-bridge motor driver for DC motor and stepper motor control — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fdrv8833.pdf&ref=openhardware.directory&product=lilygo-t-bao&source=md-export)
- **AXP202** (battery-charger): X-Powers AXP202 multi-function power management unit with battery charging and power path control — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Flewisxhe%2FAXP202X_Library%2Fblob%2Fmaster%2Fdatasheet%2FAXP202%2520Datasheet%2520v1.0.pdf&ref=openhardware.directory&product=lilygo-t-bao&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **I2S**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-bao&ref=openhardware.directory&product=lilygo-t-bao&source=md-export) — $80.69

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-bao&ref=openhardware.directory&product=lilygo-t-bao&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-K210-Script&ref=openhardware.directory&product=lilygo-t-bao&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-bao&source=md-export)

## Tags

`esp32`, `k210`, `risc-v`, `ai`, `camera`, `ov2640`, `motor`, `audio`, `imu`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-bao)

---

# M5Stack Atom Echo S3R

> ESP32-S3 smart speaker dev kit with ES7210 audio codec, NS4168 amplifier, dual MEMS microphones, and RGB LED. Designed for Home Assistant voice assistant, ESPHome, and audio streaming projects.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$15.5
- **CPU:** ESP32-S3
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V DC

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- esphome
- home-assistant-voice
- uiflow

## Components

- **ESP32-S3FN16R8** (mcu): Espressif ESP32-S3FN16R8 dual-core Xtensa LX7 SoC at 240MHz with 16MB flash, 8MB PSRAM, WiFi 802.11 b/g/n, BLE 5.0, and USB OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-atom-echo-s3r&source=md-export)
- **ES7210** (audio-adc): Everest Semiconductor ES7210 four-channel audio ADC with 24-bit resolution, 102 dB SNR, and I2S/TDM output for high-quality voice capture. — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.everest-semi.com%2Fpdf%2FES7210%2520PB.pdf&ref=openhardware.directory&product=m5stack-atom-echo-s3r&source=md-export)
- **NS4168** (audio-amplifier): Nationzsemi NS4168 mono Class-D audio amplifier with I2S digital input, 3W output into 4 ohms, and filterless design for compact speaker applications. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2304140030_Nationsemi-NS4168_C2649.pdf&ref=openhardware.directory&product=m5stack-atom-echo-s3r&source=md-export)
- **MSM381A3729H9CP** (microphone): MEMS microphones for voice capture with high sensitivity and low noise floor, optimized for far-field voice recognition. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fmedia.digikey.com%2Fpdf%2FData%2520Sheets%2FKnowles%2520Acoustics%2520PDFs%2FMSM381A3729H9CP.pdf&ref=openhardware.directory&product=m5stack-atom-echo-s3r&source=md-export)

## Protocols

- **I2S**
- **I2C**
- **UART**
- **SPI**
- **GPIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stack-atom-echos3r-smart-speaker&ref=openhardware.directory&product=m5stack-atom-echo-s3r&source=md-export) — $15.50
- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fatom-echos3r-smart-speaker-dev-kit&ref=openhardware.directory&product=m5stack-atom-echo-s3r&source=md-export) — $14.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fatom%2FAtom%2520EchoS3R&ref=openhardware.directory&product=m5stack-atom-echo-s3r&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5Stack-Atom-EchoS3R&ref=openhardware.directory&product=m5stack-atom-echo-s3r&source=md-export)

## Tags

`esp32-s3`, `voice-assistant`, `smart-speaker`, `home-assistant`, `esphome`, `m5stack`, `atom-echo`, `i2s-audio`, `mems-microphone`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-atom-echo-s3r)

---

# Adafruit FunHouse

> WiFi IoT automation board with ESP32-S2, built-in 1.54″ color TFT, barometric pressure, humidity, temperature sensors, DotStar LEDs, capacitive touch, and a speaker.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** IoT Controller
- **Price:** ~$34.95
- **CPU:** Xtensa LX7 single-core @ 240 MHz (ESP32-S2)
- **RAM:** 320 KB SRAM + 2 MB PSRAM
- **Flash:** 4MB
- **Power:** 5V
- **Dimensions:** 85 × 56 × 10.8 mm

## Connectivity

WiFi 2.4GHz 802.11 b/g/n

## Compatible Firmware

- circuitpython
- arduino
- esp-idf

## Components

- **ESP32-S2** (mcu): Espressif ESP32-S2 single-core 240 MHz Xtensa LX7 with native USB, 2.4 GHz WiFi, 320 KB SRAM, and 2 MB PSRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-funhouse&source=md-export)
- **DPS310** (sensor): Infineon DPS310 barometric pressure and temperature sensor with I2C interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.infineon.com%2Fdgdl%2FInfineon-DPS310-DataSheet-v01_02-EN.pdf%3FfileId%3D5546d462576f34750157750826c42242&ref=openhardware.directory&product=adafruit-funhouse&source=md-export)
- **AHT20** (sensor): ASAIR AHT20 capacitive relative-humidity and temperature sensor with I2C interface. — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.aosong.com%2Fuserfiles%2Ffiles%2Fmedia%2FData%2520Sheet%2520AHT20.pdf&ref=openhardware.directory&product=adafruit-funhouse&source=md-export)
- **ST7789** (display-driver): Sitronix ST7789 SPI display controller driving the 240x240 colour TFT panel. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7789.pdf&ref=openhardware.directory&product=adafruit-funhouse&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **I2C (STEMMA QT)**: SDA=GPIO3, SCL=GPIO4
- **SPI**: SCK=GPIO36, MOSI=GPIO35, MISO=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO13 | A0 — ADC | — | analog-input, digital-input, digital-output |
| GPIO14 | A1 — ADC | — | analog-input, digital-input, digital-output |
| GPIO15 | A2 — ADC | — | analog-input, digital-input, digital-output |
| GPIO36 | SCK — SPI (TFT) | — | digital-input, digital-output |
| GPIO35 | MOSI — SPI (TFT) | — | digital-input, digital-output |
| GPIO37 | MISO — SPI (TFT) | — | digital-input, digital-output |
| GPIO0 | SDA — I2C (STEMMA QT) | — | digital-input, digital-output |
| GPIO1 | SCL — I2C (STEMMA QT) | — | digital-input, digital-output |
| GPIO43 | TX — UART | — | digital-input, digital-output |
| GPIO44 | RX — UART | — | digital-input, digital-output |
| GPIO37 | BTN_A | — | digital-input |
| GPIO38 | BTN_B | — | digital-input |
| GPIO39 | BTN_C | — | digital-input |
| GPIO34 | PIR sensor | — | digital-input |
| GPIO33 | DAC — Speaker | — | dac, digital-output |
| GPIO4 | BTN_UP | — | digital-input |
| GPIO3 | BTN_DOWN | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4985&ref=openhardware.directory&product=adafruit-funhouse&source=md-export) — 34.95

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_funhouse%2F&ref=openhardware.directory&product=adafruit-funhouse&source=md-export)
- [ESPHome](https://openhardware.directory/r?to=https%3A%2F%2Fesphome.io%2F&ref=openhardware.directory&product=adafruit-funhouse&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4985&ref=openhardware.directory&product=adafruit-funhouse&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-FunHouse-PCB&ref=openhardware.directory&product=adafruit-funhouse&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-funhouse&ref=openhardware.directory&product=adafruit-funhouse&source=md-export)

## Tags

`esp32-s2`, `funhouse`, `home-automation`, `tft-display`, `dotstar`, `stemma-qt`, `circuitpython`, `sensors`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-funhouse)

---

# Adafruit ItsyBitsy ESP32 PCB Antenna

> Compact ItsyBitsy-format ESP32 board with 8MB flash, 2MB PSRAM, PCB antenna, Wi-Fi + Bluetooth Classic + BLE, 20 GPIO, NeoPixel, STEMMA QT, and Micro-B USB.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$14.95
- **CPU:** ESP32 PICO ECO V3
- **RAM:** 520KB SRAM
- **Flash:** 8 MB
- **Power:** 5V via Micro-B USB or up to 6V supply
- **Dimensions:** 36.0 x 17.6 x 6.9 mm

## Connectivity

WiFi 802.11b/g/n | Bluetooth 5.0 Classic + BLE

## Compatible Firmware

- arduino
- circuitpython
- micropython

## Components

- **ESP32 PICO ECO V3** (mcu): Dual-core Xtensa LX6 SiP with integrated 8MB flash, 2MB PSRAM, PCB antenna. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-pico-mini-02_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-itsybitsy-esp32-pcb&source=md-export)
- **NeoPixel RGB LED** (led): Onboard addressable RGB NeoPixel. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=adafruit-itsybitsy-esp32-pcb&source=md-export)

## Protocols

- **I2C**: SDA=GPIO21, SCL=GPIO22
- **SPI**: MOSI=GPIO23, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | D0 | — | digital |
| GPIO1 | D1 | — | digital |
| GPIO2 | D2 | — | digital |
| GPIO3 | D3 | — | digital |
| GPIO4 | D4 | — | digital |
| GPIO5 | D5 (5V level) | — | digital |
| GPIO6 | D6 | — | digital |
| GPIO7 | D7 | — | digital |
| GPIO8 | D8 | — | digital |
| GPIO9 | D9 | — | digital |
| GPIO14 | A4 | — | analog, digital |
| GPIO15 | A3 | — | analog, digital |
| GPIO16 | A2 | — | analog, digital |
| GPIO17 | A1 | — | analog, digital |
| GPIO18 | A0 | — | analog, digital |
| GPIO21 | SDA | — | i2c-sda, digital |
| GPIO22 | SCL | — | i2c-scl, digital |
| GPIO23 | MOSI | — | spi-mosi, digital |
| GPIO36 | MISO | — | spi-miso, digital |
| GPIO37 | SCK | — | spi-sck, digital |
| GPIO43 | TX | — | uart-tx, digital |
| GPIO44 | RX | — | uart-rx, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5889&ref=openhardware.directory&product=adafruit-itsybitsy-esp32-pcb&source=md-export) — 14.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5889&ref=openhardware.directory&product=adafruit-itsybitsy-esp32-pcb&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-itsybitsy-esp32&ref=openhardware.directory&product=adafruit-itsybitsy-esp32-pcb&source=md-export)

## Tags

`adafruit`, `itsybitsy`, `esp32`, `compact`, `circuitpython`, `psram`, `bt-classic`, `ble`

## Certifications

FCC, RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-itsybitsy-esp32-pcb)

---

# LILYGO T-Watch 2020 V3

> Programmable ESP32 smartwatch with 1.54-inch touch IPS display, BMA423 accelerometer, PCF8563 RTC, PDM microphone, speaker, IR transmitter, and vibration motor — fully open-source and Arduino/MicroPython programmable.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** smartwatch
- **Price:** ~$35.29
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **USB:** USB-C 2.0
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- platformio

## Components

- **ESP32-D0WDQ6-V3** (mcu): Espressif ESP32-D0WDQ6-V3 dual-core Xtensa LX6 at 240MHz with WiFi and Bluetooth 4.2/BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-watch-2020-v3&source=md-export)
- **ST7789V** (display-driver): Sitronix ST7789V driving the 1.54-inch 240×240 IPS round-corner display. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7789.pdf&ref=openhardware.directory&product=lilygo-t-watch-2020-v3&source=md-export)
- **FT6336U** (touch-controller): FocalTech FT6336U capacitive touch controller with gesture recognition for the 1.54-inch display. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffocusiot.com%2Fwp-content%2Fuploads%2F2018%2F07%2FFT6336U-1.pdf&ref=openhardware.directory&product=lilygo-t-watch-2020-v3&source=md-export)
- **BMA423** (accelerometer): Bosch BMA423 3-axis accelerometer with built-in step counter, activity recognition, and wrist-tilt detection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bma423-ds000.pdf&ref=openhardware.directory&product=lilygo-t-watch-2020-v3&source=md-export)
- **AXP202** (power-management): X-Powers AXP202 power management IC handling LiPo charging, multiple LDO regulators, and fuel gauge for the watch. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FTTGO_TWatch_Library%2Fblob%2Fmaster%2Fdocs%2FAXP202%2520Datasheet%2520v1.0.en.pdf&ref=openhardware.directory&product=lilygo-t-watch-2020-v3&source=md-export)
- **MAX98357A** (audio-amplifier): Analog Devices MAX98357A I2S mono amplifier delivering 1W into 8Ω for the onboard speaker. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX98357A-MAX98357B.pdf&ref=openhardware.directory&product=lilygo-t-watch-2020-v3&source=md-export)
- **PCF8563** (rtc): NXP PCF8563 I2C real-time clock with alarm function and battery backup for accurate timekeeping. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FPCF8563.pdf&ref=openhardware.directory&product=lilygo-t-watch-2020-v3&source=md-export)
- **IR12-21C** (ir-transmitter): Infrared LED transmitter for sending IR remote control signals at 940nm. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.everlight.com%2Ffile%2FProductFile%2FIR12-21C-TR8.pdf&ref=openhardware.directory&product=lilygo-t-watch-2020-v3&source=md-export)
- **SPM1423HM4H-B** (microphone): Knowles SPM1423HM4H-B PDM MEMS microphone added in V3 for voice capture. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.knowles.com%2Fdocs%2Fdefault-source%2Fmodel-downloads%2Fspm1423hm4h-b-revb-datasheet.pdf&ref=openhardware.directory&product=lilygo-t-watch-2020-v3&source=md-export)

## Protocols

- **SPI**: MOSI=GPIO19, MISO=GPIO2, CLK=GPIO18, CS=GPIO5
- **I2C**: SDA=GPIO21, SCL=GPIO22
- **I2S**: BCLK=GPIO26, LRCK=GPIO25, DATA=GPIO33

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Crown Button / Boot | — | digital-input, strapping |
| GPIO2 | SPI MISO | — | digital-input |
| GPIO5 | SPI CS (Display) | — | digital-output |
| GPIO8 | IR Transmitter | — | digital-output, pwm |
| GPIO12 | Free GPIO / Touch CS | — | digital-input, digital-output, adc |
| GPIO18 | SPI CLK | — | digital-output |
| GPIO19 | SPI MOSI | — | digital-output |
| GPIO21 | I2C SDA | — | digital-input, digital-output |
| GPIO22 | I2C SCL | — | digital-output |
| GPIO25 | I2S LRCK | — | digital-output |
| GPIO26 | I2S BCLK | — | digital-output |
| GPIO33 | I2S DATA | — | digital-output |
| GPIO34 | Vibration Motor | — | digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-watch-2020-v3&ref=openhardware.directory&product=lilygo-t-watch-2020-v3&source=md-export) — $35.29

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-watch-2020-v3&ref=openhardware.directory&product=lilygo-t-watch-2020-v3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FTTGO_TWatch_Library&ref=openhardware.directory&product=lilygo-t-watch-2020-v3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-watch-2020-v3&source=md-export)

## Tags

`esp32`, `smartwatch`, `wearable`, `lilygo`, `ttgo`, `touch`, `accelerometer`, `rtc`, `speaker`, `microphone`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-watch-2020-v3)

---

# LILYGO T-Deck Plus

> ESP32-S3 handheld dev board with QWERTY keyboard, trackball, 2.8" IPS LCD, LoRa SX1262, GPS, speaker, dual microphones, and 2000mAh battery in an ABS case.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$70.99
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C 2.0
- **Power:** 5V
- **Dimensions:** 115 × 72 × 20 mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio
- micropython
- meshtastic
- meshcore

## Components

- **ESP32-S3FN16R8** (mcu): Xtensa LX7 dual-core processor at 240MHz with 16MB flash and 8MB PSRAM, supporting WiFi 802.11 b/g/n and Bluetooth 5.0 LE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export)
- **SX1262** (radio): Semtech long-range radio supporting 150MHz to 960MHz bands with +22dBm transmit power and LoRa/FSK modulation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export)
- **ST7789** (display-driver): Sitronix TFT display controller driving a 320×240 IPS LCD panel via SPI interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.orientdisplay.com%2Fcontroller-datasheets%2Fsitronix%2Fst7789v-lcd-controller-datasheet%2F&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export)
- **ES7210** (audio-adc): Everest Semiconductor 4-channel audio analog-to-digital converter capturing input from dual MEMS microphones via I2S — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.everest-semi.com%2Fpdf%2FES7210%2520PB.pdf&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export)
- **MAX98357A** (audio-amplifier): Analog Devices 3.2W Class-D mono amplifier with integrated DAC, driving the built-in speaker directly from I2S digital audio — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fen%2Fproducts%2Fmax98357a.html&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export)
- **MIA-M10Q** (gps): u-blox M10 concurrent multi-constellation receiver supporting GPS, GLONASS, Galileo, and BeiDou with 1.5m accuracy — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.u-blox.com%2Fen%2Fproduct%2Fmia-m10-module&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export)
- **MSM381A3729H9CP** (microphone): Dual digital MEMS microphones for voice capture and audio input, connected through the ES7210 audio ADC — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.alldatasheet.com%2Fview.jsp%3FSearchword%3DMSM381A3729H9CP&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export)
- **TP4065B** (battery-charger): Linear lithium battery charging IC managing the built-in 2000mAh LiPo battery via USB-C input — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheetspdf.com%2Fpdf%2F1299986%2FTopPower%2FTP4065%2F1&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export)
- **AN48841B** (hall-effect-sensor): Panasonic omnipolar Hall effect ICs detecting the magnetic trackball rotation on four axes for cursor control — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet4u.com%2Fdatasheet-pdf%2FPanasonicSemiconductor%2FAN48841B%2Fpdf.php%3Fid%3D692700&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export)
- **ESP32-C3** (keyboard-controller): Dedicated RISC-V microcontroller handling QWERTY keyboard scanning and trackball input, communicating with the main ESP32-S3 via I2C — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export)

## Protocols

- **SPI** (SPI0): MOSI=GPIO41, MISO=GPIO38, SCK=GPIO40, CS_Display=GPIO12, CS_LoRa=GPIO9, CS_SD=GPIO39
- **I2C** (I2C0): SDA=GPIO18, SCL=GPIO8
- **I2S** (I2S_OUT): WS=GPIO5, BCK=GPIO7, DOUT=GPIO6
- **I2S** (I2S_IN (ES7210)): MCLK=GPIO48, LRCK=GPIO21, SCK=GPIO47, DIN=GPIO14
- **UART** (UART_GPS): TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | BOOT Button | — | digital-input, digital-output, strapping, rtc |
| GPIO1 | Trackball G04 | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO2 | Trackball G02 | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO3 | Trackball G01 | — | digital-input, digital-output, adc, touch, pwm, rtc, strapping |
| GPIO4 | Battery ADC | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO5 | I2S WS (Speaker) | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO6 | I2S DOUT (Speaker) | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO7 | I2S BCK (Speaker) | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO8 | I2C SCL | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO9 | LoRa CS | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO10 | Peripheral Power Control | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO11 | TFT DC | — | digital-input, digital-output, adc, touch, pwm |
| GPIO12 | TFT CS | — | digital-input, digital-output, adc, touch, pwm |
| GPIO13 | LoRa BUSY | — | digital-input, digital-output, adc, touch, pwm |
| GPIO14 | ES7210 DIN (Mic) | — | digital-input, digital-output, adc, touch, pwm |
| GPIO15 | Trackball G03 | — | digital-input, digital-output, adc, pwm |
| GPIO16 | Touch INT | — | digital-input, digital-output, adc, pwm |
| GPIO17 | LoRa RST | — | digital-input, digital-output, adc, pwm |
| GPIO18 | I2C SDA | — | digital-input, digital-output, adc, pwm |
| GPIO21 | ES7210 LRCK (Mic) | — | digital-input, digital-output, pwm |
| GPIO38 | SPI MISO | — | digital-input, digital-output, pwm |
| GPIO39 | SD Card CS | — | digital-input, digital-output, pwm |
| GPIO40 | SPI SCK | — | digital-input, digital-output, pwm |
| GPIO41 | SPI MOSI | — | digital-input, digital-output, pwm |
| GPIO42 | TFT Backlight | — | digital-input, digital-output, pwm |
| GPIO43 | GPS TX | — | digital-input, digital-output, pwm |
| GPIO44 | GPS RX | — | digital-input, digital-output, pwm |
| GPIO45 | LoRa DIO1 | — | digital-input, digital-output, strapping |
| GPIO46 | Keyboard INT | — | digital-input, digital-output, strapping |
| GPIO47 | ES7210 SCK (Mic) | — | digital-input, digital-output, pwm |
| GPIO48 | ES7210 MCLK (Mic) | — | digital-input, digital-output, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-deck-plus-1&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export) — $70.99
- [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2F1005007568074083.html&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export) — $70.99
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FLILYGO-ESP32-S3-LORA-89-2-8-inch-Development%2Fdp%2FB0FBGX1VP5&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export) — $75.49

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-deck-plus-1&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Deck&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc%2Fget_started%2Fen%2FWearable%2FT-Deck-Plus%2FT-Deck-Plus.html&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Deck%2Fblob%2Fmaster%2Fschematic%2Fschematic.pdf&ref=openhardware.directory&product=lilygo-t-deck-plus&source=md-export)

## Tags

`esp32-s3`, `lora`, `gps`, `meshtastic`, `meshcore`, `keyboard`, `trackball`, `battery`, `display`, `handheld`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-deck-plus)

---

# LILYGO T-Watch Ultra

> Premium ESP32-S3 smartwatch development platform with 2.06" AMOLED touchscreen, LoRa SX1262, GNSS, NFC, MAX98357A audio, DRV2605 haptic, AXP2101 PMIC, and 1100mAh battery.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$78.32
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + LiPo
- **Dimensions:** 49×63.5×22mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- micropython

## Components

- **ESP32-S3** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-watch-ultra&source=md-export)
- **CO5300** (display-driver): High-resolution AMOLED display driver supporting 410×502 pixels with 16.7M colors. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Watch-Ultra&ref=openhardware.directory&product=lilygo-t-watch-ultra&source=md-export)
- **CST9217** (touch-controller): Capacitive touch controller with I2C interface supporting up to 5 touch points. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Watch-Ultra&ref=openhardware.directory&product=lilygo-t-watch-ultra&source=md-export)
- **SX1262** (radio): Long-range LoRa transceiver covering 150–960 MHz with +22 dBm output power. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-watch-ultra&source=md-export)
- **MAX98357A** (audio-amplifier): Filterless 3.2W Class D amplifier with I2S interface for speaker audio output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX98357A-MAX98357B.pdf&ref=openhardware.directory&product=lilygo-t-watch-ultra&source=md-export)
- **DRV2605** (haptic): I2C haptic motor driver with 123 built-in waveforms for ERM and LRA actuators. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fdrv2605.pdf&ref=openhardware.directory&product=lilygo-t-watch-ultra&source=md-export)
- **AXP2101** (battery-charger): Advanced PMIC with multi-rail LDO outputs, LiPo charging, fuel gauge, and power-off control. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Watch-Ultra&ref=openhardware.directory&product=lilygo-t-watch-ultra&source=md-export)

## Protocols

- **SPI**: CLK=GPIO3, MOSI=GPIO1, MISO=GPIO4, CS=GPIO2
- **I2C**: SDA=GPIO10, SCL=GPIO11
- **I2S**: BCLK=GPIO44, WS=GPIO43, DOUT=GPIO45

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO10 | I2C SDA | — | digital-input, digital-output |
| GPIO11 | I2C SCL | — | digital-input, digital-output |
| GPIO44 | I2S BCLK | — | digital-output |
| GPIO43 | I2S WS | — | digital-output |
| GPIO45 | I2S DOUT | — | digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-watch-ultra&ref=openhardware.directory&product=lilygo-t-watch-ultra&source=md-export) — $78.32
- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Flilygo-t-watch-ultra-lora&ref=openhardware.directory&product=lilygo-t-watch-ultra&source=md-export) — €99.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-watch-ultra&ref=openhardware.directory&product=lilygo-t-watch-ultra&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Watch-Ultra&ref=openhardware.directory&product=lilygo-t-watch-ultra&source=md-export)

## Tags

`esp32-s3`, `smartwatch`, `lora`, `gnss`, `amoled`, `nfc`, `haptic`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-watch-ultra)

---

# LILYGO T-Display P4

> High-performance ESP32-P4 development board with dual-core 360MHz RISC-V, 4.1" AMOLED or 4.05" TFT touchscreen, 2MP camera, SX1262 LoRa, GPS, 9-axis IMU, and ESP32-C6 for Wi-Fi 6 and Bluetooth 5.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-P4
- **Price:** ~$97.4
- **CPU:** ESP32-P4 (Dual-core RISC-V 360MHz + 40MHz)
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V
- **Dimensions:** 63 x 109 x 22mm

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio

## Components

- **ESP32-P4** (mcu): Dual-core RISC-V 360MHz + 40MHz high-performance application processor with 32MB PSRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-display-p4&source=md-export)
- **ESP32-C6** (mcu): Wi-Fi 6 and Bluetooth 5 LE wireless co-processor — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-display-p4&source=md-export)
- **SX1262** (radio): Long-range LoRa radio transceiver available in 868/915/920MHz variants — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-display-p4&source=md-export)
- **L76K** (gps): Multi-constellation GNSS module for GPS positioning — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.quectel.com%2FUploadImage%2FStatics%2FAbout%2FProduct%2F2019110715522610.pdf&ref=openhardware.directory&product=lilygo-t-display-p4&source=md-export)
- **ICM-20948** (accelerometer): 9-axis MEMS IMU with accelerometer, gyroscope, and magnetometer plus onboard DMP — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fwp-content%2Fuploads%2F2016%2F06%2FDS-000189-ICM-20948-v1.3.pdf&ref=openhardware.directory&product=lilygo-t-display-p4&source=md-export)
- **OV2710** (camera): 2MP MIPI camera sensor capable of 1080p@30fps and 720p@60fps — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ovt.com%2Fsensors%2FOV2710&ref=openhardware.directory&product=lilygo-t-display-p4&source=md-export)
- **LGs4056H** (battery-charger): Linear Li-ion battery charge controller for 18650 cell charging — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.lcsc.com%2Fdatasheet%2Flcsc_datasheet_1809291439_LGS-LGs4056H_C424779.pdf&ref=openhardware.directory&product=lilygo-t-display-p4&source=md-export)
- **BQ27220** (sensor): I2C battery gas gauge for accurate state-of-charge measurement — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fbq27220.pdf&ref=openhardware.directory&product=lilygo-t-display-p4&source=md-export)
- **XL9535** (other): 16-bit I2C GPIO expander providing 24-pin expansion — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.lcsc.com%2Fdatasheet%2Flcsc_datasheet_2304140030_XINLUDA-XL9535_C2681658.pdf&ref=openhardware.directory&product=lilygo-t-display-p4&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **I2S**
- **MIPI CSI**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-p4&ref=openhardware.directory&product=lilygo-t-display-p4&source=md-export) — $97.40

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-p4&ref=openhardware.directory&product=lilygo-t-display-p4&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Display-P4&ref=openhardware.directory&product=lilygo-t-display-p4&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-display-p4&source=md-export)

## Tags

`esp32-p4`, `esp32-c6`, `amoled`, `tft`, `lora`, `gps`, `camera`, `imu`, `wifi6`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-display-p4)

---

# M5StickC Plus 2

> Compact ESP32-PICO-V3-02 wearable dev board with 1.14" TFT LCD (135x240), 6-axis IMU (MPU6886), IR transmitter, microphone, buzzer, 200mAh battery, Wi-Fi and Bluetooth in a 48x24x13.5mm form factor.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$19.95
- **CPU:** ESP32-PICO-V3-02
- **RAM:** 520KB SRAM
- **Flash:** 8MB
- **USB:** USB-C
- **Power:** 5V
- **Dimensions:** 48.0 x 24.0 x 13.5mm

## Connectivity

WiFi Wi-Fi 4 (2.4GHz) | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf
- uiflow
- micropython

## Components

- **ESP32-PICO-V3-02** (MCU): Dual-core Xtensa LX6 up to 240MHz with integrated Wi-Fi and Bluetooth — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-pico-v3-02_datasheet_en.pdf&ref=openhardware.directory&product=m5stickc-plus-2&source=md-export)
- **ST7789V2** (Display Driver): TFT LCD controller for 1.14" 135x240 display — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.newhavendisplay.com%2Fappnotes%2Fdatasheets%2FLCDs%2FST7789V2_SPEC_V1.0.pdf&ref=openhardware.directory&product=m5stickc-plus-2&source=md-export)
- **MPU6886** (IMU): 6-axis accelerometer and gyroscope — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fwp-content%2Fuploads%2F2020%2F06%2FDS-000286-MPU-6886-v1.2.pdf&ref=openhardware.directory&product=m5stickc-plus-2&source=md-export)
- **BM8563** (RTC): Real-time clock for timekeeping — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F1912111437_GATEMODE-BM8563_C413258.pdf&ref=openhardware.directory&product=m5stickc-plus-2&source=md-export)
- **SPM1423** (Microphone): MEMS microphone for audio input — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2206010030_Knowles-SPM1423HM4H-B_C2684877.pdf&ref=openhardware.directory&product=m5stickc-plus-2&source=md-export)
- **IR Transmitter** (IR): Infrared LED for remote control applications — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.vishay.com%2Fdocs%2F81009%2Ftsal6200.pdf&ref=openhardware.directory&product=m5stickc-plus-2&source=md-export)
- **Buzzer** (Audio): Built-in buzzer for audio feedback — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.murata.com%2Fen-global%2Fproducts%2Fproductdata%2F8797589053470%2FSPEC-PKMC16E4T1000-B0.pdf&ref=openhardware.directory&product=m5stickc-plus-2&source=md-export)
- **AXP2101** (Power): Multi-channel PMIC for battery charging and power regulation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fdatasheet%2Fcore%2FAXP2101_Datasheet_V1.0_en.pdf&ref=openhardware.directory&product=m5stickc-plus-2&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **GPIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stickc-plus2-esp32-mini-iot-development-kit&ref=openhardware.directory&product=m5stickc-plus-2&source=md-export) — $19.95
- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stickcplus2&ref=openhardware.directory&product=m5stickc-plus-2&source=md-export) — $19.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stickc-plus2-esp32-mini-iot-development-kit&ref=openhardware.directory&product=m5stickc-plus-2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5StickCPlus2&ref=openhardware.directory&product=m5stickc-plus-2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FM5StickC%2520PLUS2&ref=openhardware.directory&product=m5stickc-plus-2&source=md-export)

## Tags

`esp32`, `wearable`, `iot`, `dev-board`, `m5stack`, `imu`, `ir-transmitter`, `tft-display`, `battery-powered`, `compact`, `bluetooth`, `wifi`, `arduino`, `micropython`, `uiflow`

---
[View full device page](https://openhardware.directory/s/1370/m5stickc-plus-2)

---

# WT32-SC01 Plus

> ESP32-S3 development board with a 3.5" capacitive touch IPS LCD (480x320), 16MB flash, and 8MB PSRAM. Popular for building custom HMI/UI projects with LVGL, smart home panels, and IoT dashboards.

## Quick Facts

- **Brand:** Wireless-Tag
- **Board Type:** dev-board
- **Price:** ~$46.9
- **CPU:** ESP32-S3
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- micropython
- lvgl
- esphome

## Components

- **ESP32-S3** (MCU): Espressif ESP32-S3 dual-core Xtensa LX7 microcontroller running at 240MHz with integrated Wi-Fi 802.11 b/g/n and Bluetooth 5.0 LE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=wt32-sc01-plus&source=md-export)
- **3.5" IPS LCD 480x320** (Display): 3.5-inch IPS LCD panel with 480x320 resolution, driven via SPI interface with 16-bit color depth — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wireless-tag.com%2Fproduct%2Fwt32-sc01-plus&ref=openhardware.directory&product=wt32-sc01-plus&source=md-export)
- **Capacitive Touch Panel** (Touch): FT5x06-based capacitive touch panel overlay supporting multi-touch input on the 3.5" display — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.buydisplay.com%2Fdownload%2Fic%2FFT5206.pdf&ref=openhardware.directory&product=wt32-sc01-plus&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwt32sc01plus&ref=openhardware.directory&product=wt32-sc01-plus&source=md-export) — $46.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwt32sc01plus&ref=openhardware.directory&product=wt32-sc01-plus&source=md-export)

## Tags

`esp32-s3`, `touch-display`, `lvgl`, `hmi`, `iot`, `dev-board`

---
[View full device page](https://openhardware.directory/s/1370/wt32-sc01-plus)

---

# Waveshare ESP32-S3-AUDIO-Board

> ESP32-S3 AI smart speaker development board with dual-microphone array, ES8311 audio codec, 7 surround RGB LEDs, RTC, camera and LCD expansion interfaces, and LiPo battery support for voice assistant and audio projects.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$15.99
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V via USB-C / 3.7V LiPo battery

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3R8** (mcu): Espressif ESP32-S3R8 Xtensa LX7 dual-core @ 240MHz with 512KB SRAM, 8MB PSRAM, WiFi and BLE 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export)
- **ES8311** (audio-adc): Everest Semiconductor ES8311 24-bit mono audio codec with DAC/ADC and I2S interface for speaker output and microphone input — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2108130930_Everest-semi-Everest-Semiconductor-ES8311_C2688009.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export)
- **ES7210** (audio-adc): Everest Semiconductor ES7210 four-channel audio ADC for dual-microphone array with noise reduction — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2206010030_Everest-semi-Everest-Semiconductor-ES7210_C2919758.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export)
- **TCA9555PWR** (io-expander): Texas Instruments TCA9555PWR 16-bit I2C GPIO expander with interrupt output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftca9555.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export)
- **PCF85063** (rtc): NXP PCF85063 real-time clock with integrated crystal, alarm function, and battery backup — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FPCF85063A.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export)
- **MP1605GTF-Z** (power-management): MPS MP1605GTF-Z synchronous buck converter providing 3.3V at up to 2A output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.monolithicpower.com%2Fen%2Fdocumentview%2Fproductdocument%2Findex%2Fversion%2F2%2Fdocument_type%2FDatasheet%2Flang%2Fen%2Fsku%2FMP1605%2Fdocument_id%2F9426%2F&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export)
- **WS2812B** (led-driver): 7x WS2812 addressable RGB LEDs in surround configuration for voice assistant visual feedback — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **I2S**
- **DVP**
- **UART**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO3 | LCD_CS | — | digital-input, digital-output |
| GPIO4 | LCD_SCK | — | digital-input, digital-output |
| GPIO5 | LCD_BL | — | digital-input, digital-output, pwm |
| GPIO7 | LCD_DC | — | digital-input, digital-output |
| GPIO8 | LCD_MISO | — | digital-input, digital-output |
| GPIO9 | LCD_MOSI | — | digital-input, digital-output |
| GPIO10 | I2C SCL | — | digital-input, digital-output |
| GPIO11 | I2C SDA | — | digital-input, digital-output |
| GPIO12 | I2S MCLK | — | digital-input, digital-output |
| GPIO13 | I2S SCLK | — | digital-input, digital-output |
| GPIO14 | I2S LRCK | — | digital-input, digital-output |
| GPIO15 | I2S_ASDOUT (mic) | — | digital-input, digital-output |
| GPIO16 | I2S_DSDIN (speaker) | — | digital-input, digital-output |
| GPIO40 | SD_SCK | — | digital-input, digital-output |
| GPIO41 | SD_D0/MISO | — | digital-input, digital-output |
| GPIO42 | SD_CMD/MOSI | — | digital-input, digital-output |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-audio-board.htm&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export) — $15.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-audio-board.htm&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-S3-AUDIO-Board&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FESP32-S3-AUDIO-Board%2FESP32-S3-AUDIO-Board_1.1.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export)

## Tags

`esp32-s3`, `audio`, `smart-speaker`, `microphone`, `voice-assistant`, `ai`, `rgb-led`, `rtc`, `waveshare`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-esp32-s3-audio-board)

---

# ESP32-S2 Kaluga Dev Kit

> Espressif's multimedia-focused ESP32-S2 evaluation platform bundling four extension boards: audio player, capacitive touch panel, 3.2" LCD display, and camera module. Designed to showcase ESP32-S2 human-computer interaction features.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$54.95
- **CPU:** Xtensa LX7 single-core @ 240MHz (ESP32-S2)
- **RAM:** 320KB SRAM + 2MB PSRAM
- **Flash:** 4MB SPI Flash
- **Power:** 5V via Micro-USB

## Connectivity

WiFi 802.11 b/g/n @ 2.4GHz (ESP32-S2 WROVER) | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- esp-idf
- arduino

## Components

- **ESP32-S2** (mcu): Espressif ESP32-S2 single-core Xtensa LX7 @ 240MHz, 320KB SRAM, WiFi, native USB 1.1 OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F4729%2F4729_esp32-s2-wrover_esp32-s2-wrover-i_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s2-kaluga-dev-kit&source=md-export)

## Protocols

- **SPI**: MOSI=GPIO35, MISO=GPIO37, SCK=GPIO36
- **I2C**: SDA=GPIO8, SCL=GPIO9
- **UART**: TX=GPIO43, RX=GPIO44
- **I2S**
- **USB**: D-=GPIO19, D+=GPIO20
- **ADC**
- **Touch**
- **LCD**
- **Camera**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | ADC1_CH0/Touch1 | — | ADC, Touch, GPIO |
| GPIO2 | ADC1_CH1/Touch2 | — | ADC, Touch, GPIO |
| GPIO3 | ADC1_CH2/Touch3 | — | ADC, Touch, GPIO |
| GPIO4 | ADC1_CH3/Touch4 | — | ADC, Touch, GPIO |
| GPIO8 | SDA | — | I2C, ADC, Touch, GPIO |
| GPIO9 | SCL | — | I2C, ADC, Touch, GPIO |
| GPIO17 | DAC1 | — | DAC, ADC, GPIO |
| GPIO18 | DAC2 | — | DAC, ADC, GPIO |
| GPIO19 | USB_D- | — | USB, GPIO |
| GPIO20 | USB_D+ | — | USB, GPIO |
| GPIO35 | MOSI | — | SPI, GPIO |
| GPIO36 | SCK | — | SPI, GPIO |
| GPIO37 | MISO | — | SPI, GPIO |
| GPIO43 | TX | — | UART, GPIO |
| GPIO44 | RX | — | UART, GPIO |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4729&ref=openhardware.directory&product=esp32-s2-kaluga-dev-kit&source=md-export) — 54.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4729&ref=openhardware.directory&product=esp32-s2-kaluga-dev-kit&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4729&ref=openhardware.directory&product=esp32-s2-kaluga-dev-kit&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.espressif.com%2Fprojects%2Fesp-idf%2Fen%2Flatest%2Fesp32s2%2Fhw-reference%2Fesp32s2%2Fuser-guide-esp32-s2-kaluga-1-kit.html&ref=openhardware.directory&product=esp32-s2-kaluga-dev-kit&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-idf&ref=openhardware.directory&product=esp32-s2-kaluga-dev-kit&source=md-export)

## Tags

`esp32-s2`, `dev-kit`, `wifi`, `espressif`, `psram`, `audio`, `lcd`, `camera`, `touch`, `multimedia`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/esp32-s2-kaluga-dev-kit)

---

# LILYGO T-Lora Pager

> Compact LoRa pager with ESP32-S3, 2.33" touchscreen, QWERTY keyboard, u-blox GNSS, BHI260AP AI IMU, ES8311 audio codec, RFID/NFC, and foldable antenna for off-grid messaging.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$80.96
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + LiPo
- **Dimensions:** 106×89×23mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- meshtastic

## Components

- **ESP32-S3** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-lora-pager&source=md-export)
- **ST7796** (display-driver): SPI TFT LCD driver for 222×480 resolution display. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7796S.pdf&ref=openhardware.directory&product=lilygo-t-lora-pager&source=md-export)
- **SX1262** (radio): Long-range LoRa transceiver covering 150–960 MHz with +22 dBm output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-lora-pager&source=md-export)
- **MIA-M10Q** (gps): Ultra-compact u-blox GNSS module supporting GPS, GLONASS, BeiDou, and Galileo. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.u-blox.com%2Fen%2Fproduct%2Fmia-m10-series&ref=openhardware.directory&product=lilygo-t-lora-pager&source=md-export)
- **BHI260AP** (accelerometer): Self-learning AI sensor hub with integrated 6-axis IMU for gesture recognition and motion classification. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fproducts%2Fsmart-sensor-systems%2Fbhi260ap%2F&ref=openhardware.directory&product=lilygo-t-lora-pager&source=md-export)
- **ES8311** (audio-codec): 24-bit mono audio codec with I2S interface, supporting microphone input and headphone output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.everest-semi.com%2Fpdf%2FES8311%2520PB.pdf&ref=openhardware.directory&product=lilygo-t-lora-pager&source=md-export)

## Protocols

- **SPI**: CLK=GPIO12, MOSI=GPIO11, MISO=GPIO13
- **I2C**: SDA=GPIO4, SCL=GPIO5
- **I2S**: BCLK=GPIO44, WS=GPIO43, DOUT=GPIO45

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO4 | I2C SDA | — | digital-input, digital-output |
| GPIO5 | I2C SCL | — | digital-input, digital-output |
| GPIO44 | I2S BCLK | — | digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-lora-pager&ref=openhardware.directory&product=lilygo-t-lora-pager&source=md-export) — $80.96

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-lora-pager&ref=openhardware.directory&product=lilygo-t-lora-pager&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-LoRa-Pager&ref=openhardware.directory&product=lilygo-t-lora-pager&source=md-export)

## Tags

`esp32-s3`, `lora`, `gps`, `keyboard`, `pager`, `meshtastic`, `audio`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-lora-pager)

---

# LILYGO T-HMI

> ESP32-S3 HMI development board with a 2.8-inch resistive touchscreen, GROVE connectors, 16MB flash, 8MB PSRAM, and USB-C — designed for industrial HMI panels and interactive control interfaces.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$17.99
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C 2.0
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- esphome
- platformio

## Components

- **ESP32-S3R8** (mcu): Espressif ESP32-S3R8 dual-core Xtensa LX7 at 240MHz with 8MB integrated PSRAM, WiFi, BLE 5.0, and USB OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-hmi&source=md-export)
- **ST7789V** (display-driver): Sitronix ST7789V TFT LCD driver for the 2.8-inch 320×240 panel with resistive touch overlay. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7789.pdf&ref=openhardware.directory&product=lilygo-t-hmi&source=md-export)

## Protocols

- **I2C**: SDA=GPIO4, SCL=GPIO5
- **UART**: TX=GPIO43, RX=GPIO44
- **SPI**: MOSI=GPIO11, CLK=GPIO12, CS=GPIO10

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot Button | — | digital-input, strapping |
| GPIO4 | GROVE I2C SDA | — | digital-input, digital-output, touch |
| GPIO5 | GROVE I2C SCL | — | digital-output, touch |
| GPIO10 | Display CS | — | digital-output |
| GPIO11 | SPI MOSI | — | digital-output |
| GPIO12 | SPI CLK | — | digital-output |
| GPIO38 | Free GPIO | — | digital-input, digital-output |
| GPIO43 | UART TX | — | digital-output |
| GPIO44 | UART RX | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-hmi&ref=openhardware.directory&product=lilygo-t-hmi&source=md-export) — $17.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-hmi&ref=openhardware.directory&product=lilygo-t-hmi&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-HMI&ref=openhardware.directory&product=lilygo-t-hmi&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-hmi&source=md-export)

## Tags

`esp32-s3`, `hmi`, `touchscreen`, `lilygo`, `grove`, `industrial`, `display`, `wifi`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-hmi)

---

# Waveshare ESP32-S3 Touch LCD 7

> ESP32-S3 dev board with 7" capacitive touch IPS display (800x480), CAN/RS485 interfaces, and battery support. Built for HMI panels, industrial control, and IoT dashboards.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$59.85
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** Type-C
- **Power:** 5V 450mA via USB-C

## Connectivity

WiFi 2.4GHz 802.11b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- micropython
- lvgl

## Components

- **ESP32-S3** (MCU): Xtensa LX7 dual-core processor at 240MHz with integrated WiFi and Bluetooth 5.0 LE, 512KB SRAM and 8MB PSRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-7&source=md-export)
- **7" RGB IPS LCD** (Display): 800x480 RGB IPS panel with 65K colors, 345 cd/m² brightness, 170° viewing angle, 5-point capacitive touch with toughened glass — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-S3-Touch-LCD-7&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-7&source=md-export)
- **CH422G** (GPIO Expander): I2C-bus GPIO expander providing additional I/O pins for peripheral control — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fdownloads%2FCH422DS1_PDF.html&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-7&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **CAN**
- **RS-485**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwaveshare-esp32-s3-7inch-lcd&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-7&source=md-export) — $59.85
- [Waveshare Official](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-touch-lcd-7.htm&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-7&source=md-export) — $59.85

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-touch-lcd-7.htm&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-7&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-S3-Touch-LCD-7&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-7&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fpaulhamsh%2FWaveshare-ESP32-S3-LCD-7-LVGL&ref=openhardware.directory&product=waveshare-esp32-s3-touch-lcd-7&source=md-export)

## Tags

`esp32-s3`, `touch-display`, `7-inch`, `hmi`, `can-bus`, `rs485`, `battery`, `waveshare`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-esp32-s3-touch-lcd-7)

---

# LILYGO T-Deck Pro

> ESP32-S3 keyboard terminal with 3.1" e-paper touchscreen, LoRa SX1262, GPS, BHI260AP AI IMU, PCM5102A/ES8311 audio, 1400mAh battery, and optional 4G LTE (A7682E) for off-grid terminal applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$84.96
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- meshtastic

## Components

- **ESP32-S3FN16R8** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-deck-pro&source=md-export)
- **GDEQ031T10** (display-driver): 3.1-inch monochrome e-paper display driver supporting 320×240 with touch support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Deck-Pro&ref=openhardware.directory&product=lilygo-t-deck-pro&source=md-export)
- **SX1262** (radio): Long-range LoRa transceiver covering 150–960 MHz with +22 dBm output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-deck-pro&source=md-export)
- **BHI260AP** (accelerometer): Self-learning AI sensor hub with integrated 6-axis IMU for gesture recognition. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fproducts%2Fsmart-sensor-systems%2Fbhi260ap%2F&ref=openhardware.directory&product=lilygo-t-deck-pro&source=md-export)
- **A7682E** (cellular-modem): 4G LTE Cat-1 cellular modem for global band connectivity (optional variant). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.simcom.com%2Fproduct%2FA7682E.html&ref=openhardware.directory&product=lilygo-t-deck-pro&source=md-export)

## Protocols

- **SPI**: CLK=GPIO40, MOSI=GPIO41, MISO=GPIO38
- **I2C**: SDA=GPIO18, SCL=GPIO8
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO18 | I2C SDA | — | digital-input, digital-output |
| GPIO8 | I2C SCL | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-deck-pro&ref=openhardware.directory&product=lilygo-t-deck-pro&source=md-export) — $84.96

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-deck-pro&ref=openhardware.directory&product=lilygo-t-deck-pro&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Deck-Pro&ref=openhardware.directory&product=lilygo-t-deck-pro&source=md-export)

## Tags

`esp32-s3`, `e-paper`, `keyboard`, `lora`, `gps`, `4g`, `meshtastic`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-deck-pro)

---

# Waveshare RaspRover

> Open-source 4WD AI robot with dual-controller architecture (ESP32 + Raspberry Pi), 5MP 160-degree camera, pan-tilt module, audio system, computer vision via OpenCV/MediaPipe, and ROS2 support for AI robotics education.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** robot-platform
- **Price:** ~$174.99
- **CPU:** ESP32-WROOM-32 + Raspberry Pi 4B/5
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C (CH340)
- **Power:** 3S 18650 Li-ion UPS
- **Dimensions:** 172.40 x 182.91 x 251.25mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf
- micropython
- ros2

## Components

- **ESP32-WROOM-32** (mcu): Dual-core WiFi & Bluetooth sub-controller for motion and sensor processing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-rasprover&source=md-export)
- **TB6612FNG** (motor-driver): Dual H-bridge MOSFET motor driver for 4 N20 encoder motors — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sparkfun.com%2Fdatasheets%2FRobotics%2FTB6612FNG.pdf&ref=openhardware.directory&product=waveshare-rasprover&source=md-export)
- **ICM-20948** (imu): 9-axis IMU (accel + gyro + magnetometer) for motion sensing and stabilization — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fwp-content%2Fuploads%2F2016%2F06%2FDS-000189-ICM-20948-v1.3.pdf&ref=openhardware.directory&product=waveshare-rasprover&source=md-export)
- **INA219** (current-sensor): I2C voltage/current/power monitor for battery management — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fina219.pdf&ref=openhardware.directory&product=waveshare-rasprover&source=md-export)
- **SSS1629A5** (audio-controller): USB audio controller IC for speaker and microphone — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRaspRover&ref=openhardware.directory&product=waveshare-rasprover&source=md-export)
- **APA2068** (audio-amplifier): Audio amplifier for dual-track speaker output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRaspRover&ref=openhardware.directory&product=waveshare-rasprover&source=md-export)
- **FE1.1S** (usb-hub): 4-port USB 2.0 hub controller for peripheral management — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRaspRover&ref=openhardware.directory&product=waveshare-rasprover&source=md-export)
- **CH340** (usb-uart): USB-to-serial converter for LIDAR UART data — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRaspRover&ref=openhardware.directory&product=waveshare-rasprover&source=md-export)
- **ST3215** (servo): Serial bus servo for pan-tilt, 20 kg.cm torque (PT versions) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FST3215_Servo&ref=openhardware.directory&product=waveshare-rasprover&source=md-export)
- **5MP Wide-Angle Camera** (camera): 5MP ultra-wide-angle camera with 160 degree FOV for computer vision — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRaspRover&ref=openhardware.directory&product=waveshare-rasprover&source=md-export)

## Protocols

- **I2C**
- **UART**
- **SPI**
- **PWM**
- **ESP-NOW**
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO25 | Motor A PWM | — | — |
| GPIO26 | Motor B PWM | — | — |
| GPIO17 | Motor A direction | — | — |
| GPIO21 | Motor A direction | — | — |
| GPIO22 | Motor B direction | — | — |
| GPIO23 | Motor B direction | — | — |
| GPIO32 | I2C SDA | — | — |
| GPIO33 | I2C SCL | — | — |
| GPIO18 | Servo UART RXD | — | — |
| GPIO19 | Servo UART TXD | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frasprover.htm&ref=openhardware.directory&product=waveshare-rasprover&source=md-export) — $174.99

## Available Software

- [ugv_base_general](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2Fugv_base_general&ref=openhardware.directory&product=waveshare-rasprover&source=md-export)
- [ugv_rpi](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2Fugv_rpi&ref=openhardware.directory&product=waveshare-rasprover&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frasprover.htm&ref=openhardware.directory&product=waveshare-rasprover&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2Fugv_rpi&ref=openhardware.directory&product=waveshare-rasprover&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRaspRover&ref=openhardware.directory&product=waveshare-rasprover&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FRaspRover%2FROS_Driver_for_Robots.pdf&ref=openhardware.directory&product=waveshare-rasprover&source=md-export)

## Tags

`robotics`, `ai-robot`, `esp32`, `raspberry-pi`, `ros2`, `computer-vision`, `4wd`, `open-source`, `stem`, `audio`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-rasprover)

---

# LILYGO T3-S3 MVSR

> ESP32-S3 LoRa voice kit with MAX98357A speaker, MSM261S4030HOR microphone, vibration motor, RTC, 0.96-inch SSD1306 OLED, 4MB Flash, 2MB PSRAM, and SX1262/SX1276/SX1280 radio options — designed for LoRa voice communication and off-grid messaging.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$26.15
- **CPU:** ESP32-S3FH4R2
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio
- meshtastic

## Components

- **ESP32-S3FH4R2** (mcu): Dual-core Xtensa LX7 at 240MHz with 4MB Flash, 2MB PSRAM, WiFi, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t3-s3-mvsr&source=md-export)
- **SSD1306** (display): 0.96-inch monochrome OLED at 128×64 resolution via I2C interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t3-s3-mvsr&source=md-export)
- **SX1262** (radio): Semtech SX1262 sub-GHz LoRa transceiver (433/868/915MHz, variant-dependent). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t3-s3-mvsr&source=md-export)
- **MAX98357A** (audio): Maxim MAX98357A I2S digital-to-analog audio amplifier for speaker output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.maximintegrated.com%2Fen%2Fds%2FMAX98357A-MAX98357B.pdf&ref=openhardware.directory&product=lilygo-t3-s3-mvsr&source=md-export)
- **MSM261S4030HOR** (microphone): I2S MEMS microphone for audio capture and voice input. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2Fdatasheet%2F2%2F744%2FMerry_MSM261S4030HOR_Rev_A_1-2536185.pdf&ref=openhardware.directory&product=lilygo-t3-s3-mvsr&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **I2S**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft3-s3-mvsr&ref=openhardware.directory&product=lilygo-t3-s3-mvsr&source=md-export) — $26.15

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft3-s3-mvsr&ref=openhardware.directory&product=lilygo-t3-s3-mvsr&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT3-S3-MVSRBoard&ref=openhardware.directory&product=lilygo-t3-s3-mvsr&source=md-export)

## Tags

`esp32-s3`, `lora`, `sx1262`, `sx1276`, `sx1280`, `speaker`, `microphone`, `vibration-motor`, `rtc`, `oled`, `meshtastic`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t3-s3-mvsr)

---

# M5Stack Air Quality Kit v1.1

> ESP32-S3 based air quality monitor with SEN55 particulate/VOC sensor, SCD40 CO2 sensor, 1.54" e-ink display, 600mAh battery, and Grove connector.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$89.9
- **CPU:** ESP32-S3FN8
- **RAM:** 512KB SRAM
- **Flash:** 8 MB
- **Power:** USB-C / 3.7V Li-Po
- **Dimensions:** 72.0 x 56.0 x 26.5 mm

## Connectivity

WiFi WiFi 4 | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- UIFlow

## Components

- **ESP32-S3FN8** (MCU): Espressif dual-core Xtensa LX7 MCU with WiFi and BLE 5.0, 8MB integrated flash — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-air-quality-kit&source=md-export)
- **SEN55** (Environmental Sensor): Sensirion multi-sensor module measuring PM1.0, PM2.5, PM4, PM10, VOC, temperature and humidity — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsensirion.com%2Fproducts%2Fcatalog%2FSEN55&ref=openhardware.directory&product=m5stack-air-quality-kit&source=md-export)
- **SCD40** (CO2 Sensor): Sensirion miniaturized CO2 sensor using photoacoustic measurement, 400-2000 ppm range — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsensirion.com%2Fproducts%2Fcatalog%2FSCD40&ref=openhardware.directory&product=m5stack-air-quality-kit&source=md-export)
- **GDEY0154D67** (Display): 1.54 inch e-paper display with 200x200 pixel resolution, ultra-low power consumption — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.good-display.com%2Fproduct%2F442.html&ref=openhardware.directory&product=m5stack-air-quality-kit&source=md-export)
- **RTC8563** (RTC): Low-power RTC for sleep/wake scheduling and timekeeping — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FPCF8563.pdf&ref=openhardware.directory&product=m5stack-air-quality-kit&source=md-export)

## Protocols

- **I2C**
- **WiFi**
- **Grove**

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stack-air-quality-v1-1-m5stamps3a&ref=openhardware.directory&product=m5stack-air-quality-kit&source=md-export) — $89.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stack-air-quality-v1-1-m5stamps3a&ref=openhardware.directory&product=m5stack-air-quality-kit&source=md-export)

## Tags

`air-quality`, `esp32-s3`, `co2-sensor`, `particulate-sensor`, `voc`, `e-ink`, `m5stack`, `environmental-monitoring`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-air-quality-kit)

---

# LILYGO T-Display

> Compact ESP32-PICO-D4 development board with integrated 1.14-inch ST7789V IPS LCD (135×240, 260 PPI), WiFi, Bluetooth 4.2/BLE, and Arduino/MicroPython support.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$8.99
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C 2.0
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- esphome
- platformio

## Components

- **ESP32-PICO-D4** (mcu): Espressif ESP32-PICO-D4 System-in-Package with dual-core Xtensa LX6 @ 240MHz, 4MB embedded flash, WiFi 802.11 b/g/n, and Bluetooth 4.2/BLE in a compact 7×7mm package. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-pico-d4_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-display&source=md-export)
- **ST7789V** (display-driver): Sitronix ST7789V TFT LCD driver controlling the 1.14-inch 135×240 IPS panel at 260 PPI over 4-wire SPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7789.pdf&ref=openhardware.directory&product=lilygo-t-display&source=md-export)
- **CH9102** (usb-uart): WCH CH9102 USB-to-UART converter enabling programming and serial debug over USB-C without needing extra drivers on most systems. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fdownloads%2FCH9102DS1_PDF.html&ref=openhardware.directory&product=lilygo-t-display&source=md-export)

## Protocols

- **SPI**: MOSI=GPIO19, CLK=GPIO18, CS=GPIO5, DC=GPIO16
- **I2C**: SDA=GPIO21, SCL=GPIO22
- **UART**: TX=GPIO1, RX=GPIO3

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Button 2 / Boot | — | digital-input, strapping |
| GPIO4 | TFT Backlight | — | digital-output, pwm |
| GPIO5 | TFT CS | — | digital-output |
| GPIO12 | Free GPIO | — | digital-input, digital-output, adc, pwm |
| GPIO13 | Free GPIO | — | digital-input, digital-output, adc, pwm |
| GPIO14 | ADC Power Enable | — | digital-output, pwm |
| GPIO15 | Free GPIO | — | digital-input, digital-output, adc, pwm |
| GPIO16 | TFT DC | — | digital-output |
| GPIO17 | Free GPIO | — | digital-input, digital-output, pwm |
| GPIO18 | TFT SCLK | — | digital-output |
| GPIO19 | TFT MOSI | — | digital-output |
| GPIO21 | I2C SDA | — | digital-input, digital-output |
| GPIO22 | I2C SCL | — | digital-output |
| GPIO25 | Free GPIO / DAC1 | — | digital-input, digital-output, dac, pwm |
| GPIO26 | Free GPIO / DAC2 | — | digital-input, digital-output, dac, pwm |
| GPIO27 | Free GPIO | — | digital-input, digital-output, adc, pwm |
| GPIO32 | Free GPIO | — | digital-input, digital-output, adc, pwm, rtc |
| GPIO33 | Free GPIO | — | digital-input, digital-output, adc, pwm, rtc |
| GPIO34 | ADC Input / Battery Voltage | — | digital-input, adc, input-only, rtc |
| GPIO35 | Button 1 | — | digital-input, input-only |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display&ref=openhardware.directory&product=lilygo-t-display&source=md-export) — $8.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display&ref=openhardware.directory&product=lilygo-t-display&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FTTGO-T-Display&ref=openhardware.directory&product=lilygo-t-display&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-display&source=md-export)

## Tags

`esp32`, `display`, `ips`, `lilygo`, `compact`, `ttgo`, `wifi`, `bluetooth`

## Certifications

CE, FCC, UKCA, MIC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-display)

---

# LILYGO T-Deck

> ESP32-S3 handheld terminal with 2.8-inch IPS display, mini QWERTY keyboard, trackball, optional SX1262 LoRa, speaker, and microphone — a self-contained portable communicator running Meshtastic and MeshCore.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$43.08
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C 2.0
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- meshtastic
- meshcore
- platformio

## Components

- **ESP32-S3FN16R8** (mcu): Espressif ESP32-S3FN16R8 dual-core Xtensa LX7 at 240MHz with 16MB flash, 8MB PSRAM, WiFi, BLE 5.0, and USB OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-deck&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver with +22 dBm output and -148 dBm sensitivity for long-range mesh networking. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-deck&source=md-export)
- **ST7789** (display-driver): Sitronix ST7789 TFT LCD driver for the 2.8-inch 320×240 IPS display over SPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7789.pdf&ref=openhardware.directory&product=lilygo-t-deck&source=md-export)
- **ESP32-C3** (keyboard-controller): Espressif ESP32-C3 dedicated keyboard matrix controller communicating with the main S3 via I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-deck&source=md-export)
- **AN48841B** (hall-effect-sensor): Panasonic AN48841B hall effect sensors (4×) powering the trackball for directional navigation input. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Findustrial.panasonic.com%2Fcdbs%2Fwww-data%2Fpdf%2FABI0000%2FABI0000CE11.pdf&ref=openhardware.directory&product=lilygo-t-deck&source=md-export)
- **MAX98357A** (audio-amplifier): Analog Devices MAX98357A I2S Class-D amplifier for onboard speaker output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX98357A-MAX98357B.pdf&ref=openhardware.directory&product=lilygo-t-deck&source=md-export)
- **MSM381A3729H9CP** (microphone): MEMS microphone for audio capture and voice input on the T-Deck. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2Fdatasheet%2F2%2F281%2FMSM381A3729H9CP-1485793.pdf&ref=openhardware.directory&product=lilygo-t-deck&source=md-export)

## Protocols

- **SPI**: MOSI=GPIO41, MISO=GPIO38, CLK=GPIO40, CS=GPIO12
- **I2C**: SDA=GPIO18, SCL=GPIO8
- **I2S**: BCLK=GPIO7, LRCK=GPIO5, DATA=GPIO6
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot Button | — | digital-input, strapping |
| GPIO3 | Trackball click | — | digital-input |
| GPIO4 | Battery ADC | — | digital-input, adc |
| GPIO5 | I2S LRCK (speaker) | — | digital-output |
| GPIO6 | I2S DATA (speaker) | — | digital-output |
| GPIO7 | I2S BCLK (speaker) | — | digital-output |
| GPIO8 | I2C SCL (keyboard/touch) | — | digital-output, touch |
| GPIO18 | I2C SDA (keyboard/touch) | — | digital-input, digital-output, touch |
| GPIO38 | SPI MISO | — | digital-input |
| GPIO40 | SPI CLK | — | digital-output |
| GPIO41 | SPI MOSI | — | digital-output |
| GPIO43 | UART TX | — | digital-output |
| GPIO44 | UART RX | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-deck&ref=openhardware.directory&product=lilygo-t-deck&source=md-export) — $43.08

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-deck&ref=openhardware.directory&product=lilygo-t-deck&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Deck&ref=openhardware.directory&product=lilygo-t-deck&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-deck&source=md-export)

## Tags

`esp32-s3`, `keyboard`, `lora`, `trackball`, `lilygo`, `meshtastic`, `portable`, `terminal`, `off-grid`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-deck)

---

# duckyPad Pro

> 20-key open-source mechanical macropad with duckyScript engine, ESP32-S3, 1.5\" OLED, Bluetooth 5.0, hot-swap switches, dual rotary encoders, and microSD — a powerful Stream Deck alternative.

## Quick Facts

- **Brand:** dekuNukem
- **Board Type:** macropad
- **Price:** ~$84.99
- **CPU:** ESP32-S3 Xtensa LX7 dual-core @ 240MHz
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **GPIO:** 20 keys + 2 encoders + expansion pins
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- duckyScript
- esp-idf

## Components

- **ESP32-S3FN4R2** (mcu): Espressif ESP32-S3FN4R2 dual-core Xtensa LX7 SoC at 240MHz with 4MB flash, 2MB PSRAM, WiFi 802.11 b/g/n, and Bluetooth 5.0 LE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=duckypad-pro&source=md-export)
- **SSD1306** (display-driver): Solomon Systech SSD1306-compatible OLED display controller driving the 128x128 1.5-inch OLED via SPI interface with 256-step brightness control. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=duckypad-pro&source=md-export)
- **PEC12R** (rotary-encoder): Two Bourns PEC12R series incremental rotary encoders with integrated tactile push-switch, supporting max 24mm knob diameter. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bourns.com%2Fdocs%2FProduct-Datasheets%2FPEC12R.pdf&ref=openhardware.directory&product=duckypad-pro&source=md-export)
- **kailh-hot-swap-socket** (switch-socket): 20 Kailh hot-swap sockets compatible with Cherry MX 3-pin and 5-pin mechanical switches for tool-free switch replacement. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.kailhswitch.com%2Fmechanical-keyboard-switches%2Fbox-switches%2Fhot-swapping-pcb-socket.html&ref=openhardware.directory&product=duckypad-pro&source=md-export)
- **WS2812B** (led-driver): 20 north-facing WS2812B-compatible addressable RGB LEDs for per-key lighting, driven via ESP32-S3 RMT peripheral at 10MHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=duckypad-pro&source=md-export)

## Protocols

- **SPI**: MOSI: GPIO10, SCK: GPIO11, DC: GPIO12, RST: GPIO13, CS: GPIO14
- **UART**: TX: GPIO16, RX: GPIO15
- **USB**: USB-C (native USB OTG)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Rotary Encoder 1 Switch | — | — |
| GPIO1 | Rotary Encoder 1 B | — | — |
| GPIO2 | Rotary Encoder 1 A | — | — |
| GPIO3 | Rotary Encoder 2 Switch | — | — |
| GPIO4 | Rotary Encoder 2 B | — | — |
| GPIO5 | Rotary Encoder 2 A | — | — |
| GPIO6 | SD Card Detect | — | — |
| GPIO10 | OLED SPI MOSI | — | — |
| GPIO11 | OLED SPI SCK | — | — |
| GPIO12 | OLED DC | — | — |
| GPIO13 | OLED Reset | — | — |
| GPIO14 | OLED CS | — | — |
| GPIO15 | Expansion UART RX | — | — |
| GPIO16 | Expansion UART TX | — | — |
| GPIO17 | Plus Button | — | — |
| GPIO18 | Minus Button | — | — |
| GPIO35 | Key Matrix Row 4 | — | — |
| GPIO36 | Key Matrix Row 3 | — | — |
| GPIO37 | Key Matrix Row 2 | — | — |
| GPIO38 | Key Matrix Column 3 | — | — |
| GPIO39 | Key Matrix Column 2 | — | — |
| GPIO40 | Key Matrix Row 1 | — | — |
| GPIO41 | Key Matrix Column 1 | — | — |
| GPIO42 | Key Matrix Column 0 | — | — |
| GPIO45 | Key Matrix Row 0 | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** MIT

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fdekunukem%2Fduckypad-pro-macro-scripting-beyond-qmkvia%2F&ref=openhardware.directory&product=duckypad-pro&source=md-export) — $84.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fdekunukem%2Fduckypad-pro-macro-scripting-beyond-qmkvia%2F&ref=openhardware.directory&product=duckypad-pro&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FdekuNukem%2FduckyPad-Pro&ref=openhardware.directory&product=duckypad-pro&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FdekuNukem%2FduckyPad-Pro%2Fblob%2Fmaster%2Fdoc%2Fgetting_started.md&ref=openhardware.directory&product=duckypad-pro&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FdekuNukem%2FduckyPad-Pro%2Ftree%2Fmaster%2Fpcb&ref=openhardware.directory&product=duckypad-pro&source=md-export)

## Tags

`macropad`, `duckyScript`, `mechanical-keyboard`, `macro-automation`, `esp32-s3`, `bluetooth`, `open-source-hardware`, `hot-swap`, `stream-deck-alternative`, `oled-display`, `rotary-encoder`, `usb-hid`

---
[View full device page](https://openhardware.directory/s/1370/duckypad-pro)

---

# Louder ESP32

> ESP32 audio development board with TAS5805M I2S Class-D amplifier delivering 2x23W stereo output, designed for multi-room audio, network streaming, and smart home integration.

## Quick Facts

- **Brand:** Sonocotta
- **Board Type:** audio-board
- **Price:** ~$24
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, AES/SHA hardware crypto
- **RAM:** 520KB SRAM
- **Flash:** 8MB
- **USB:** Micro-USB (programming)
- **Power:** 4.5-26V external PSU
- **Dimensions:** 85.6 × 56.5mm (RPi 4 form factor)

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BT 4.2 + BLE | Ethernet Optional W5500 SPI module

## Compatible Firmware

- esphome
- squeezelite
- snapcast
- arduino
- platformio

## Components

- **ESP32-WROVER-N8R8** (mcu): Espressif ESP32-WROVER module with Xtensa LX6 dual-core processor at 240MHz, 8MB flash, 8MB PSRAM, WiFi 802.11 b/g/n, Bluetooth 4.2, and hardware crypto acceleration. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wrover-e_esp32-wrover-ie_datasheet_en.pdf&ref=openhardware.directory&product=louder-esp32&source=md-export)
- **TAS5805M** (audio-amplifier): Texas Instruments closed-loop Class-D stereo amplifier with integrated I2S DAC and DSP. Delivers 2x23W at 8 ohms (1% THD+N) or 45W bridged mono at 4 ohms. Features 15-band parametric EQ, 128-tap FIR filter, 3-band DRC, automatic gain limiter, and 107dB SNR. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftas5805m.pdf&ref=openhardware.directory&product=louder-esp32&source=md-export)
- **WS2812B** (led-driver): WS2812B addressable RGB LED for status indication, controllable via single-wire protocol from ESP32 GPIO. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=louder-esp32&source=md-export)

## Protocols

- **I2S** (I2S0): CLK=GPIO26, DATA=GPIO22, WS=GPIO25
- **I2C** (I2C0): SDA=GPIO21, SCL=GPIO27
- **SPI** (SPI0): CLK=GPIO18, MOSI=GPIO23, MISO=GPIO19, CS=GPIO5
- **UART** (UART0): TX=TX0, RX=RX0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO26 | I2S CLK | — | digital-output, pwm, adc, dac |
| GPIO22 | I2S DATA | — | digital-input, digital-output, pwm |
| GPIO25 | I2S WS | — | digital-output, pwm, adc, dac |
| GPIO21 | I2C SDA | — | digital-input, digital-output, pwm |
| GPIO27 | I2C SCL | — | digital-input, digital-output, pwm, adc, touch |
| GPIO33 | DAC PWDN | — | digital-input, digital-output, pwm, adc, touch |
| GPIO34 | DAC FAULT | — | digital-input, input-only |
| GPIO39 | IR Input | — | digital-input, input-only |
| GPIO12 | RGB LED Output | — | digital-input, digital-output, pwm, adc, touch |
| GPIO18 | SPI CLK | — | digital-input, digital-output, pwm |
| GPIO23 | SPI MOSI | — | digital-input, digital-output, pwm |
| GPIO19 | SPI MISO | — | digital-input, digital-output, pwm |
| GPIO5 | SPI CS (Ethernet) | — | digital-input, digital-output, pwm |
| GPIO15 | SPI CS (OLED) | — | digital-input, digital-output, pwm, adc, touch |
| GPIO4 | OLED DC | — | digital-input, digital-output, pwm, adc, touch |
| GPIO32 | OLED RST | — | digital-input, digital-output, pwm, adc, touch |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fsonocotta%2Flouder-esp32%2F&ref=openhardware.directory&product=louder-esp32&source=md-export) — $24.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fsonocotta.com%2Flouder-esp32%2F&ref=openhardware.directory&product=louder-esp32&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsonocotta%2Fesp32-audio-dock&ref=openhardware.directory&product=louder-esp32&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsonocotta%2Fesp32-audio-dock%2Fblob%2Fmain%2FREADME.md&ref=openhardware.directory&product=louder-esp32&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftas5805m.pdf&ref=openhardware.directory&product=louder-esp32&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsonocotta%2Fesp32-audio-dock%2Ftree%2Fmain%2Fhardware&ref=openhardware.directory&product=louder-esp32&source=md-export)

## Tags

`esp32`, `audio`, `i2s`, `class-d-amplifier`, `tas5805m`, `multi-room-audio`, `network-audio`, `esphome`, `squeezelite`, `snapcast`, `home-assistant`, `dsp`

---
[View full device page](https://openhardware.directory/s/1370/louder-esp32)

---

# LILYGO T4

> LILYGO T4 is an ESP32 development board with 8MB PSRAM, optional 2.2 or 2.4-inch ILI9341 TFT LCD display, Wi-Fi, Bluetooth 4.2 BLE, and Li-Po battery support.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$16.66
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro USB (CH9102F)
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- esphome

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 at 240MHz with Wi-Fi 802.11 b/g/n, Bluetooth 4.2 BLE, 520KB SRAM, 4MB flash, 8MB PSRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t4&source=md-export)
- **ILI9341** (display-driver): ILI9341 TFT LCD display driver supporting 320x240 resolution, 65K colors, via 4-wire SPI interface, available in 2.2" and 2.4" screen sizes. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FILI9341.pdf&ref=openhardware.directory&product=lilygo-t4&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **PWM**
- **ADC**
- **DAC**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft4&ref=openhardware.directory&product=lilygo-t4&source=md-export) — $16.66

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft4&ref=openhardware.directory&product=lilygo-t4&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FTTGO-T4-TestCode&ref=openhardware.directory&product=lilygo-t4&source=md-export)

## Tags

`esp32`, `ili9341`, `tft-lcd`, `wifi`, `bluetooth`, `psram`, `lilygo`, `iot`, `display`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t4)

---

# LILYGO T-Track

> ESP32-S3R8 development board with a 1.1-inch JD9613 AMOLED display (126×294), onboard trackball, 16MB flash, 8MB PSRAM, WiFi, and BLE 5 — a compact touchless navigation dev kit for creative UI and interactive IoT applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$16.98
- **CPU:** ESP32-S3R8
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython

## Components

- **ESP32-S3R8** (mcu): Dual-core 240MHz Xtensa LX7 with 8MB embedded PSRAM, WiFi, and BLE 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-track&source=md-export)
- **JD9613** (display): 126×294 pixel AMOLED with full viewing angle via 4-wire SPI interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-track&source=md-export)
- **Trackball** (input): Onboard optical or mechanical trackball for pointer-based navigation without touchscreen — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-track&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-track&ref=openhardware.directory&product=lilygo-t-track&source=md-export) — $16.98

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-track&ref=openhardware.directory&product=lilygo-t-track&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Track&ref=openhardware.directory&product=lilygo-t-track&source=md-export)

## Tags

`esp32-s3`, `amoled`, `trackball`, `display`, `navigation`, `iot-ui`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-track)

---

# Waveshare ESP32-S3-CAM-OV5640

> ESP32-S3 AIoT camera board with 5MP OV5640 autofocus camera, dual-microphone array with noise cancellation, ES8311 audio codec, NS4150B speaker amplifier, battery charging, and display/camera expansion interfaces.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$16.99
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V via USB-C / 3.7V LiPo battery

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 Xtensa LX7 dual-core @ 240MHz with 512KB SRAM, 8MB PSRAM, 16MB flash, WiFi and BLE 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-cam-ov5640&source=md-export)
- **OV5640** (camera): OmniVision OV5640 5MP autofocus camera sensor, 2592x1944 resolution, DVP interface, 55 degree horizontal FOV — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fdatasheets%2FSensors%2FLightImaging%2FOV5640_datasheet.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-cam-ov5640&source=md-export)
- **ES8311** (audio-adc): Everest Semiconductor ES8311 24-bit mono audio codec with DAC, ADC, I2S interface for speaker and microphone — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2108130930_Everest-semi-Everest-Semiconductor-ES8311_C2688009.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-cam-ov5640&source=md-export)
- **ES7210** (audio-adc): Everest Semiconductor ES7210 four-channel audio ADC for dual-microphone array with noise reduction and echo cancellation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2206010030_Everest-semi-Everest-Semiconductor-ES7210_C2919758.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-cam-ov5640&source=md-export)
- **NS4150B** (audio-amplifier): Novosense NS4150B filterless Class-D mono amplifier, 3W output into 4 ohm speaker — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2204281400_Novosense-Micro-NS4150B_C2897867.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-cam-ov5640&source=md-export)
- **ETA6098** (battery-charger): ETA Solutions ETA6098 single-cell LiPo battery charging IC with power path management — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2206010030_ETA-Solutions-ETA6098_C2919758.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-cam-ov5640&source=md-export)
- **CH32V003F4U6** (io-expander): WCH CH32V003F4U6 RISC-V co-processor providing additional GPIO expansion — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fdownloads%2FCH32V003DS0_PDF.html&ref=openhardware.directory&product=waveshare-esp32-s3-cam-ov5640&source=md-export)
- **MP1605GTF-Z** (power-management): MPS MP1605GTF-Z synchronous buck converter providing 3.3V at up to 2A output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.monolithicpower.com%2Fen%2Fdocumentview%2Fproductdocument%2Findex%2Fversion%2F2%2Fdocument_type%2FDatasheet%2Flang%2Fen%2Fsku%2FMP1605%2Fdocument_id%2F9426%2F&ref=openhardware.directory&product=waveshare-esp32-s3-cam-ov5640&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **I2S**
- **DVP**
- **UART**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | CAM_HREF | — | digital-input, digital-output |
| GPIO2 | CAM_D0 | — | digital-input, digital-output |
| GPIO3 | LCD_CS | — | digital-input, digital-output |
| GPIO4 | LCD_SCK | — | digital-input, digital-output |
| GPIO5 | LCD_BL | — | digital-input, digital-output, pwm |
| GPIO7 | LCD_DC | — | digital-input, digital-output |
| GPIO8 | LCD_MISO | — | digital-input, digital-output |
| GPIO9 | LCD_MOSI | — | digital-input, digital-output |
| GPIO10 | I2C SCL | — | digital-input, digital-output |
| GPIO11 | I2C SDA | — | digital-input, digital-output |
| GPIO12 | I2S MCLK | — | digital-input, digital-output |
| GPIO13 | I2S SCLK | — | digital-input, digital-output |
| GPIO14 | I2S LRCK | — | digital-input, digital-output |
| GPIO15 | I2S_ASDOUT (mic) | — | digital-input, digital-output |
| GPIO16 | I2S_DSDIN (speaker) | — | digital-input, digital-output |
| GPIO17 | CAM_D1 | — | digital-input, digital-output |
| GPIO18 | CAM_D2 | — | digital-input, digital-output |
| GPIO39 | CAM_D3 | — | digital-input, digital-output |
| GPIO40 | SD_SCK | — | digital-input, digital-output |
| GPIO41 | SD_MISO | — | digital-input, digital-output |
| GPIO42 | SD_MOSI | — | digital-input, digital-output |

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-cam-ov5640.htm&ref=openhardware.directory&product=waveshare-esp32-s3-cam-ov5640&source=md-export) — $16.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-cam-ov5640.htm&ref=openhardware.directory&product=waveshare-esp32-s3-cam-ov5640&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam&ref=openhardware.directory&product=waveshare-esp32-s3-cam-ov5640&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-cam-ov5640&source=md-export)

## Tags

`esp32-s3`, `camera`, `ov5640`, `5mp`, `ai`, `audio`, `microphone`, `voice`, `aiot`, `waveshare`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-esp32-s3-cam-ov5640)

---

# M5Stack FIRE V2.7

> Feature-rich ESP32 IoT dev kit with 2.0" IPS display, 8MB PSRAM, 16MB flash, MPU6886 IMU, BMM150 magnetometer, 10x SK6812 RGB LEDs, microphone, speaker, microSD, 500mAh battery, and M5GO charging base.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$49.9
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, hardware crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **GPIO:** 10 pins
- **USB:** USB-C
- **Power:** 5V
- **Dimensions:** 54 x 54 x 30.5mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 4.2, BLE

## Compatible Firmware

- arduino
- esp-idf
- uiflow
- micropython
- platformio
- esphome

## Components

- **ESP32-D0WDQ6-V3** (mcu): Espressif ESP32 SoC with dual-core Xtensa LX6 at 240MHz, WiFi 802.11 b/g/n and Bluetooth 4.2 + BLE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-fire-v2-7&source=md-export)
- **ILI9342C** (display-driver): 320x240 IPS LCD driver with 853nit brightness, SPI interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fdatasheet%2Fcore%2FILI9342C-ILITEK.pdf&ref=openhardware.directory&product=m5stack-fire-v2-7&source=md-export)
- **MPU6886** (accelerometer): TDK InvenSense 6-axis MEMS IMU with 3-axis gyroscope and 3-axis accelerometer, I2C interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fwp-content%2Fuploads%2F2021%2F12%2FDS-000451-MPU-6886-TYP-v1.3.pdf&ref=openhardware.directory&product=m5stack-fire-v2-7&source=md-export)
- **BMM150** (magnetometer): Bosch 3-axis digital magnetometer for compass applications, I2C interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bmm150-ds001.pdf&ref=openhardware.directory&product=m5stack-fire-v2-7&source=md-export)
- **IP5306** (battery-charger): Power management IC for LiPo battery charging and 5V boost output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fdatasheet%2Fcore%2FIIC_IP5306_REG_V1.4.pdf&ref=openhardware.directory&product=m5stack-fire-v2-7&source=md-export)
- **SK6812** (led-driver): 10 individually addressable RGB LEDs on M5GO base for status indication and light effects — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F1138%2FSK6812%2BLED%2Bdatasheet%2B.pdf&ref=openhardware.directory&product=m5stack-fire-v2-7&source=md-export)
- **Analog MEMS Microphone** (microphone): Built-in analog MEMS microphone for voice input and sound detection — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2Ffire_v2.7&ref=openhardware.directory&product=m5stack-fire-v2-7&source=md-export)

## Protocols

- **I2C**: SDA=GPIO21, SCL=GPIO22
- **SPI**: MOSI=GPIO23, MISO=GPIO19, CLK=GPIO18
- **UART**: TX=GPIO17, RX=GPIO16
- **DAC**: DAC1=GPIO25, DAC2=GPIO26

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO21 | I2C SDA / Grove Port A | — | digital-input, digital-output, pwm |
| GPIO22 | I2C SCL / Grove Port A | — | digital-input, digital-output, pwm |
| GPIO17 | UART TX / Grove Port C | — | digital-input, digital-output, pwm |
| GPIO16 | UART RX / Grove Port C | — | digital-input, digital-output, pwm |
| GPIO36 | ADC / Grove Port B | — | adc, input-only |
| GPIO26 | DAC / Grove Port B | — | digital-input, digital-output, dac, adc, pwm |
| GPIO25 | DAC1 / Speaker | — | digital-input, digital-output, dac, adc, pwm |
| GPIO35 | ADC Input | — | adc, input-only |
| GPIO34 | Microphone ADC | — | adc, input-only |
| GPIO19 | SPI MISO | — | digital-input, digital-output, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stack-fire-iot-development-kit-psram-v2-7&ref=openhardware.directory&product=m5stack-fire-v2-7&source=md-export) — $49.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stack-fire-iot-development-kit-psram-v2-7&ref=openhardware.directory&product=m5stack-fire-v2-7&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5Stack&ref=openhardware.directory&product=m5stack-fire-v2-7&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2Ffire_v2.7&ref=openhardware.directory&product=m5stack-fire-v2-7&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fdatasheet%2Fcore%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-fire-v2-7&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fschematic%2FCore%2FM5-Core-Schematic%2820171206%29.pdf&ref=openhardware.directory&product=m5stack-fire-v2-7&source=md-export)

## Tags

`esp32`, `m5stack`, `psram`, `imu`, `magnetometer`, `rgb-led`, `lcd`, `iot`, `grove`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-fire-v2-7)

---

# M5Stack CoreS3 Lite

> ESP32-S3 IoT controller with 2.0" capacitive touch IPS display, GC0308 camera, dual microphones, 1W speaker, BMI270 IMU, BMM150 magnetometer, proximity sensor, 200mAh battery, and Grove expansion ports.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$44.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C (OTG)
- **Power:** 5V
- **Dimensions:** 54 x 54 x 16.5mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- esphome
- micropython
- platformio
- uiflow

## Components

- **ESP32-S3FN16R8** (mcu): Espressif ESP32-S3 with 16MB flash, 8MB PSRAM, dual-core Xtensa LX7 at 240MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-cores3-lite&source=md-export)
- **ILI9342C** (display-driver): 320x240 IPS LCD with capacitive touch via FT6336U — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fdatasheet%2Fcore%2FILI9342C-ILITEK.pdf&ref=openhardware.directory&product=m5stack-cores3-lite&source=md-export)
- **FT6336U** (touch-controller): Self-capacitive touch controller for display input — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5826%2FFT6336U-DataSheet-V1.1.pdf&ref=openhardware.directory&product=m5stack-cores3-lite&source=md-export)
- **GC0308** (camera): VGA-resolution CMOS camera sensor for computer vision and image capture — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.min.at%2Fprinz%2Ffp-content%2Fattachs%2FGC0308.pdf&ref=openhardware.directory&product=m5stack-cores3-lite&source=md-export)
- **BMI270** (accelerometer): Bosch ultra-low-power IMU with 3-axis accelerometer and gyroscope — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bmi270-ds000.pdf&ref=openhardware.directory&product=m5stack-cores3-lite&source=md-export)
- **BMM150** (magnetometer): Bosch 3-axis digital magnetometer for compass applications — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bmm150-ds001.pdf&ref=openhardware.directory&product=m5stack-cores3-lite&source=md-export)
- **AW88298** (audio-amplifier): 16-bit I2S digital input smart audio amplifier — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fdatasheet%2Fcore%2FK128%2520CoreS3%2FAW88298.PDF&ref=openhardware.directory&product=m5stack-cores3-lite&source=md-export)
- **ES7210** (audio-codec): 4-channel audio ADC for dual microphone input — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.everest-semi.com%2Fpdf%2FES7210%2520PB.pdf&ref=openhardware.directory&product=m5stack-cores3-lite&source=md-export)
- **AXP2101** (battery-charger): Advanced power management IC with battery charging and multiple voltage outputs — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fdatasheet%2Fcore%2FK128%2520CoreS3%2FAXP2101_Datasheet_V1.0_en.pdf&ref=openhardware.directory&product=m5stack-cores3-lite&source=md-export)
- **BM8563** (rtc): Low-power RTC for timekeeping and timed wake-up from deep sleep — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F1811152241_GATEMODE-BM8563_C269877.pdf&ref=openhardware.directory&product=m5stack-cores3-lite&source=md-export)

## Protocols

- **I2C**: SDA=GPIO12, SCL=GPIO11
- **SPI**: SCLK=GPIO36, MOSI=GPIO37
- **I2S**: MCLK=GPIO0, BCLK=GPIO34, LRCK=GPIO33

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | Grove Port A SDA | — | digital-input, digital-output, adc, touch, pwm |
| GPIO1 | Grove Port A SCL | — | digital-input, digital-output, adc, touch, pwm |
| GPIO8 | Port B | — | digital-input, digital-output, adc, pwm |
| GPIO9 | Port B | — | digital-input, digital-output, adc, pwm |
| GPIO17 | Port C | — | digital-input, digital-output, pwm |
| GPIO18 | Port C | — | digital-input, digital-output, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stack-cores3-lite-esp32s3-iot-dev-kit&ref=openhardware.directory&product=m5stack-cores3-lite&source=md-export) — $44.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stack-cores3-lite-esp32s3-iot-dev-kit&ref=openhardware.directory&product=m5stack-cores3-lite&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5CoreS3&ref=openhardware.directory&product=m5stack-cores3-lite&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FCoreS3-Lite&ref=openhardware.directory&product=m5stack-cores3-lite&source=md-export)

## Tags

`esp32-s3`, `m5stack`, `camera`, `touch`, `imu`, `voice-assistant`, `grove`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-cores3-lite)

---

# ESP32-DIV V2.0

> Open-source multi-band wireless development toolkit with ESP32-U, 2.8" ILI9341 TFT display, 5 antennas, and SD card slot covering WiFi, BLE, 2.4GHz, and Sub-GHz frequency bands for security research and spectrum analysis.

## Quick Facts

- **Brand:** Cirket Open Source Hardware
- **Board Type:** security-tool
- **Price:** ~$71.99
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **USB:** Micro-USB
- **Power:** 5V via Micro-USB

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2 | Zigbee false | Ethernet false

## Compatible Firmware

- arduino
- platformio
- esp-idf

## Components

- **ESP32-U** (mcu): Espressif dual-core Xtensa LX6 MCU at 240MHz with 520KB SRAM, 16MB flash, built-in WiFi 802.11 b/g/n, and Bluetooth 4.2 + BLE. U.FL variant with external antenna connector. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=esp32-div-v2&source=md-export)
- **ILI9341** (display-driver): 262K-color TFT LCD single-chip driver supporting 320x240 resolution with SPI interface, driving the 2.8-inch color display for UI and spectrum visualization. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FILI9341.pdf&ref=openhardware.directory&product=esp32-div-v2&source=md-export)
- **CP2102** (usb-serial): Silicon Labs USB-to-UART bridge supporting up to 1 Mbps baud rate, providing USB serial programming and debugging interface for the ESP32. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=esp32-div-v2&source=md-export)
- **nRF24L01** (radio): Nordic Semiconductor 2.4GHz wireless transceiver with 126 RF channels and data rates up to 2 Mbps, used for 2.4GHz ISM band scanning and spectrum analysis. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sparkfun.com%2Fdatasheets%2FComponents%2FSMD%2FnRF24L01Pluss_Preliminary_Product_Specification_v1_0.pdf&ref=openhardware.directory&product=esp32-div-v2&source=md-export)
- **CC1101** (radio): Texas Instruments low-power Sub-GHz RF transceiver supporting 300-348 MHz, 387-464 MHz, and 779-928 MHz bands with OOK, 2-FSK, 4-FSK, and MSK modulation for sub-gigahertz signal analysis. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fcc1101.pdf&ref=openhardware.directory&product=esp32-div-v2&source=md-export)
- **PCF8574** (io-expander): NXP 8-bit I/O expander on the I2C bus providing additional GPIO pins for button input and peripheral control at up to 400 kHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FPCF8574_PCF8574A.pdf&ref=openhardware.directory&product=esp32-div-v2&source=md-export)
- **LF33** (voltage-regulator): STMicroelectronics 3.3V low-dropout voltage regulator with 500mA output, providing stable 3.3V power rail for the ESP32 and peripheral circuits. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flf33.pdf&ref=openhardware.directory&product=esp32-div-v2&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fryanyu%2Fesp32-div-v20-development-board-with-5-antennas%2F&ref=openhardware.directory&product=esp32-div-v2&source=md-export) — $71.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fryanyu%2Fesp32-div-v20-development-board-with-5-antennas%2F&ref=openhardware.directory&product=esp32-div-v2&source=md-export)

## Tags

`esp32`, `multi-band`, `wireless-toolkit`, `sub-ghz`, `cc1101`, `nrf24l01`, `spectrum-analyzer`, `packet-monitor`, `security-research`, `rf-tools`

---
[View full device page](https://openhardware.directory/s/1370/esp32-div-v2)

---

# Adafruit HalloWing M0 Express

> Skull-shaped wearable microcontroller with ATSAMD21G18 at 48MHz, 1.44" 128x128 TFT display, 3-axis accelerometer, light sensor, 4 capacitive touch pads, 2W speaker driver, 8MB SPI flash, and LiPo charging.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$34.95
- **CPU:** ATSAMD21G18 ARM Cortex M0+
- **RAM:** 32 KB
- **Flash:** 256 KB
- **Power:** 5V via USB or LiPo battery via JST connector
- **Dimensions:** 60mm × 51mm × 11mm

## Compatible Firmware

- circuitpython
- arduino

## Components

- **ATSAMD21G18** (mcu): 32-bit ARM Cortex M0+ at 48 MHz with 256 KB flash, 32 KB SRAM, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM-D21DA1-Family-Data-Sheet-DS40001882G.pdf&ref=openhardware.directory&product=adafruit-hallowing-m0-express&source=md-export)
- **ST7735R** (display-driver): 128x128 color TFT LCD controller for full-color graphical display output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.crystalfontz.com%2Fcontrollers%2FSitronix%2FST7735R%2F&ref=openhardware.directory&product=adafruit-hallowing-m0-express&source=md-export)
- **LIS3DH** (imu): 3-axis digital accelerometer for motion detection and tilt sensing. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flis3dh.pdf&ref=openhardware.directory&product=adafruit-hallowing-m0-express&source=md-export)

## Protocols

- **I2C**: SDA=D4, SCL=D5
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, SS=D10
- **UART**: TX=D1, RX=D0
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D4 | SDA | — | digital-input, digital-output |
| D5 | SCL | — | digital-input, digital-output |
| D6 | GPIO | — | digital-input, digital-output, pwm |
| D9 | GPIO | — | digital-input, digital-output, pwm |
| D10 | SS | — | digital-input, digital-output, pwm |
| D11 | MOSI | — | digital-input, digital-output, pwm |
| D12 | MISO | — | digital-input, digital-output |
| D13 | SCK | — | digital-input, digital-output |
| A0 | ADC/DAC | — | digital-input, digital-output, analog-input, dac |
| A1 | ADC | — | digital-input, digital-output, analog-input |
| A2 | ADC | — | digital-input, digital-output, analog-input |
| A3 | ADC | — | digital-input, digital-output, analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3900&ref=openhardware.directory&product=adafruit-hallowing-m0-express&source=md-export) — 34.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3900&ref=openhardware.directory&product=adafruit-hallowing-m0-express&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3900&ref=openhardware.directory&product=adafruit-hallowing-m0-express&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-hallowing&ref=openhardware.directory&product=adafruit-hallowing-m0-express&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-HalloWing-M0-Express-PCB&ref=openhardware.directory&product=adafruit-hallowing-m0-express&source=md-export)

## Tags

`wearable`, `halloween`, `tft-display`, `circuitpython`, `arduino`, `atsamd21`, `skull-board`, `cosplay`, `badge`, `capacitive-touch`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-hallowing-m0-express)

---

# LILYGO T-Display S3

> ESP32-S3 development board with 1.9-inch ST7789V TFT display (170×320), optional capacitive touch, 16MB flash, 8MB PSRAM, and USB-C. Popular for smart displays and IoT dashboards.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$9.04
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C 2.0
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- esphome
- platformio

## Components

- **ESP32-S3R8** (mcu): Espressif ESP32-S3R8 dual-core Xtensa LX7 @ 240MHz with 8MB integrated PSRAM, WiFi 802.11 b/g/n, BLE 5.0, USB OTG, and AI vector extensions. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-display-s3&source=md-export)
- **ST7789V** (display-driver): Sitronix ST7789V TFT LCD driver for the 1.9-inch 170×320 panel via 8-bit parallel interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7789.pdf&ref=openhardware.directory&product=lilygo-t-display-s3&source=md-export)
- **CST816S** (touch-controller): Hynitron CST816S single-point capacitive touch controller with I2C and gesture recognition on touch variants. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Flupyuen%2Fhynitron_i2c_cst0xxse%2Fblob%2Fmaster%2FCST816S_Datasheet_EN.pdf&ref=openhardware.directory&product=lilygo-t-display-s3&source=md-export)

## Protocols

- **I2C**: SDA=GPIO43, SCL=GPIO44
- **UART**: TX=GPIO43, RX=GPIO44
- **SPI**: MOSI=GPIO11, MISO=GPIO13, CLK=GPIO12

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot Button | — | digital-input, strapping |
| GPIO4 | Battery Voltage ADC | — | digital-input, adc, input-only |
| GPIO14 | Button | — | digital-input |
| GPIO1 | Free GPIO | — | digital-input, digital-output, adc, touch |
| GPIO2 | Free GPIO | — | digital-input, digital-output, adc, touch |
| GPIO3 | Free GPIO | — | digital-input, digital-output, adc, touch |
| GPIO10 | Free GPIO | — | digital-input, digital-output, touch |
| GPIO11 | SPI MOSI | — | digital-input, digital-output |
| GPIO12 | SPI CLK | — | digital-output |
| GPIO13 | SPI MISO | — | digital-input |
| GPIO21 | Free GPIO | — | digital-input, digital-output |
| GPIO40 | Free GPIO | — | digital-input, digital-output |
| GPIO41 | Free GPIO | — | digital-input, digital-output |
| GPIO42 | Free GPIO | — | digital-input, digital-output |
| GPIO43 | UART TX / I2C SDA | — | digital-output |
| GPIO44 | UART RX / I2C SCL | — | digital-input |
| GPIO45 | Free GPIO | — | digital-input, digital-output, strapping |
| GPIO46 | Free GPIO | — | digital-input, digital-output, strapping |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-s3&ref=openhardware.directory&product=lilygo-t-display-s3&source=md-export) — $9.04

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-s3&ref=openhardware.directory&product=lilygo-t-display-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Display-S3&ref=openhardware.directory&product=lilygo-t-display-s3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-display-s3&source=md-export)

## Tags

`esp32-s3`, `display`, `tft`, `lilygo`, `touch`, `wifi`, `ble`, `usb-c`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-display-s3)

---

# LILYGO T-Display S3 Pro

> Upgraded T-Display S3 with a larger 2.33" IPS touchscreen, ESP32-S3R8, OTG charging via SY6970, QWIIC ports, ambient light/proximity sensor, and optional camera module expansion via POGOpin.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$37.99
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C (OTG)
- **Power:** 5V
- **Dimensions:** ~90×55×15mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 5.0 + Mesh

## Compatible Firmware

- arduino
- micropython
- esp-idf

## Components

- **ESP32-S3R8** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi 802.11 b/g/n, and BLE 5.0 with Bluetooth Mesh. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-display-s3-pro&source=md-export)
- **ST7796** (display-driver): SPI TFT LCD driver supporting 222×480 resolution. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7796S.pdf&ref=openhardware.directory&product=lilygo-t-display-s3-pro&source=md-export)
- **SY6970** (battery-charger): Single-cell LiPo charger with USB OTG power path management. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silergy.com%2Fproduct%2FproductInfo%2FSY6970&ref=openhardware.directory&product=lilygo-t-display-s3-pro&source=md-export)
- **LTR-553ALS** (sensor): I2C ambient light and proximity sensor for automatic display brightness. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Foptoelectronics.liteon.com%2Fupload%2Fdownload%2FDS86-2013-0003%2FLTR-553ALS-01_DS_V1.pdf&ref=openhardware.directory&product=lilygo-t-display-s3-pro&source=md-export)

## Protocols

- **SPI**: CLK=GPIO12, MOSI=GPIO11, CS=GPIO10, DC=GPIO9
- **I2C**: SDA=GPIO4, SCL=GPIO3
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO4 | I2C SDA | — | digital-input, digital-output |
| GPIO3 | I2C SCL | — | digital-input, digital-output |
| GPIO12 | Boot/User Button | — | digital-input |
| GPIO16 | User Button IO16 | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-s3-pro&ref=openhardware.directory&product=lilygo-t-display-s3-pro&source=md-export) — $37.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-s3-pro&ref=openhardware.directory&product=lilygo-t-display-s3-pro&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Display-S3-Pro&ref=openhardware.directory&product=lilygo-t-display-s3-pro&source=md-export)

## Tags

`esp32-s3`, `display`, `touchscreen`, `otg`, `camera-expansion`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-display-s3-pro)

---

# LILYGO ESP32 OLED V3.0

> ESP32 development board with integrated 0.96-inch SSD1306 OLED display, 4MB Flash, 520KB SRAM, WiFi, Bluetooth dual-mode, USB-C, and onboard LiPo battery charging for compact IoT display projects.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$8.16
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- platformio
- esphome

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 at 240MHz with 520KB SRAM, WiFi, and Bluetooth dual-mode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-esp32-oled-v3-0&source=md-export)
- **SSD1306** (display): 0.96-inch monochrome OLED display at 128×64 resolution via I2C interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-esp32-oled-v3-0&source=md-export)
- **LiPo Charger** (battery-charger): Onboard single-cell LiPo battery charger with JST connector. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Fszlcsc%2FTP4054_C16680.pdf&ref=openhardware.directory&product=lilygo-esp32-oled-v3-0&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Fesp32-oled-v3-0&ref=openhardware.directory&product=lilygo-esp32-oled-v3-0&source=md-export) — $8.16

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Fesp32-oled-v3-0&ref=openhardware.directory&product=lilygo-esp32-oled-v3-0&source=md-export)

## Tags

`esp32`, `oled`, `ssd1306`, `development-board`, `iot`, `arduino`, `micropython`, `wifi`, `bluetooth`, `usb-c`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-esp32-oled-v3-0)

---

# LILYGO T4 S3

> LILYGO T4 S3 is an ESP32-S3 development board with a 2.41-inch AMOLED touchscreen (450x600), 16MB flash, 8MB PSRAM, microSD slot, Wi-Fi, and Bluetooth 5 LE.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$56.89
- **CPU:** ESP32-S3R8
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio
- micropython
- esphome

## Components

- **ESP32-S3R8** (mcu): Dual-core Xtensa LX7 at 240MHz with Wi-Fi 802.11 b/g/n, Bluetooth 5.0 LE, USB OTG, 16MB flash, 8MB PSRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t4-s3&source=md-export)
- **2.41" AMOLED** (display): 2.41-inch SPI RGB AMOLED display with 450x600 resolution, 800 cd/m² brightness, QSPI interface, and active area 36.2x48.96mm. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft4-s3&ref=openhardware.directory&product=lilygo-t4-s3&source=md-export)

## Protocols

- **SPI**
- **QSPI**
- **I2C**
- **UART**
- **PWM**
- **ADC**
- **USB OTG**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft4-s3&ref=openhardware.directory&product=lilygo-t4-s3&source=md-export) — $56.89

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft4-s3&ref=openhardware.directory&product=lilygo-t4-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO&ref=openhardware.directory&product=lilygo-t4-s3&source=md-export)

## Tags

`esp32-s3`, `amoled`, `touchscreen`, `wifi`, `bluetooth`, `psram`, `lilygo`, `iot`, `display`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t4-s3)

---

# Mesh Detect 2

> Open-source ESP32-S3 device that detects FAA Remote ID drone broadcasts and BLE devices, reporting alerts over the Meshtastic LoRa mesh network. Uses XIAO ESP32-S3 + Heltec V3.

## Quick Facts

- **Brand:** Colonel Panic's Hack Shack
- **Board Type:** sensor-module
- **Price:** ~$110
- **CPU:** Xtensa LX7 dual-core @ 240MHz (x2 — XIAO ESP32-S3 + Heltec V3 ESP32-S3)
- **RAM:** 512KB SRAM (per ESP32-S3)
- **Flash:** 8MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0 | Zigbee false | Ethernet false

## Compatible Firmware

- arduino
- platformio
- meshtastic

## Components

- **xiao-esp32-s3** (mcu): Ultra-compact ESP32-S3 module handling WiFi and BLE scanning for Remote ID and OUI detection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.seeedstudio.com%2FXIAO-ESP32S3-p-5627.html&ref=openhardware.directory&product=mesh-detect-2&source=md-export)
- **heltec-wifi-lora-32-v3** (mcu): ESP32-S3 + SX1262 LoRa development board with 0.96" OLED display, providing mesh network connectivity via Meshtastic. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwifi-lora-32-v3%2F&ref=openhardware.directory&product=mesh-detect-2&source=md-export)
- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core Xtensa LX7 SoC with WiFi, BLE 5.0, AI acceleration — the core processor in both XIAO and Heltec V3 modules. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=mesh-detect-2&source=md-export)
- **SX1262** (radio): Semtech SX1262 sub-GHz LoRa transceiver supporting 150–960 MHz with +22 dBm output, integrated in the Heltec V3 for Meshtastic mesh relay. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=mesh-detect-2&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fcolonel_panic%2Fmesh-detect-2%2F&ref=openhardware.directory&product=mesh-detect-2&source=md-export) — $110.00

## Available Software

- [Drone Remote ID to Meshtastic](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fcolonelpanichacks%2FWiFi-RemoteID&ref=openhardware.directory&product=mesh-detect-2&source=md-export)
- [OUI Sniffer](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fcolonelpanichacks%2Fesp32-oui-sniffer%2Ftree%2FXiao-esp32-c3-serial&ref=openhardware.directory&product=mesh-detect-2&source=md-export)
- [Deepwoods Device Detection](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fcolonelpanichacks%2Fdeepwoods_device_detection&ref=openhardware.directory&product=mesh-detect-2&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fcolonel_panic%2Fmesh-detect-2%2F&ref=openhardware.directory&product=mesh-detect-2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fcolonelpanichacks%2Fmesh-detect&ref=openhardware.directory&product=mesh-detect-2&source=md-export)

## Tags

`drone-detection`, `remote-id`, `meshtastic`, `esp32-s3`, `lora`, `ble-scanner`, `oui-detection`, `mesh-networking`, `open-source`, `heltec-v3`, `xiao`

---
[View full device page](https://openhardware.directory/s/1370/mesh-detect-2)

---

# LILYGO T5s 2.7 inch E-Paper

> LILYGO T5s is an ESP32 development board with a 2.7-inch 264×176 e-paper display, onboard I2S audio (MAX98357A amplifier + ICS43434 MEMS mic), 500mA battery management, and TF card support.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$22.94
- **CPU:** Xtensa LX6 dual-core @ 240MHz
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro-USB
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- platformio
- micropython
- esphome

## Components

- **ESP32-D0WDQ6** (mcu): Espressif ESP32-D0WDQ6 REV1 dual-core Xtensa LX6 microcontroller with integrated WiFi and Bluetooth 4.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t5s-2-7inch-e-paper&source=md-export)
- **MAX98357A** (audio): Maxim MAX98357A filterless Class-D audio amplifier receiving I2S audio data directly from the ESP32. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX98357A-MAX98357B.pdf&ref=openhardware.directory&product=lilygo-t5s-2-7inch-e-paper&source=md-export)
- **ICS43434** (microphone): TDK InvenSense ICS43434 single-channel MEMS microphone with I2S output connected to the ESP32. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fwp-content%2Fuploads%2F2016%2F02%2FDS-000069-ICS43434-v1.2.pdf&ref=openhardware.directory&product=lilygo-t5s-2-7inch-e-paper&source=md-export)
- **CP2102** (usb-serial): Silicon Labs CP2102 USB to UART bridge for programming and serial communication with the ESP32. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=lilygo-t5s-2-7inch-e-paper&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **I2S**
- **UART**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| IO37 | — | — | — |
| IO38 | — | — | — |
| IO39 | — | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft5s-2-7inch-e-paper&ref=openhardware.directory&product=lilygo-t5s-2-7inch-e-paper&source=md-export) — $22.94

## Available Software

- [GxEPD2](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FZinggJM%2FGxEPD2&ref=openhardware.directory&product=lilygo-t5s-2-7inch-e-paper&source=md-export)
- [LilyGo-T5-Epaper-Series](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T5-Epaper-Series&ref=openhardware.directory&product=lilygo-t5s-2-7inch-e-paper&source=md-export)
- [TTGO-T5S-Epaper](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLilyGO%2FTTGO-T5S-Epaper&ref=openhardware.directory&product=lilygo-t5s-2-7inch-e-paper&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft5s-2-7inch-e-paper&ref=openhardware.directory&product=lilygo-t5s-2-7inch-e-paper&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T5-Epaper-Series&ref=openhardware.directory&product=lilygo-t5s-2-7inch-e-paper&source=md-export)

## Tags

`e-paper`, `e-ink`, `esp32`, `2.7-inch`, `audio`, `i2s`, `max98357a`, `ics43434`, `battery`, `tf-card`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t5s-2-7inch-e-paper)

---

# Adafruit ItsyBitsy ESP32 wFL Antenna

> Compact ItsyBitsy-format ESP32 board with 8MB flash, 2MB PSRAM, w.FL external antenna connector, Wi-Fi + Bluetooth Classic + BLE, 20 GPIO, NeoPixel, STEMMA QT, and Micro-B USB.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$14.95
- **CPU:** ESP32 PICO ECO V3
- **RAM:** 520KB SRAM
- **Flash:** 8 MB
- **Power:** 5V via Micro-B USB or up to 6V supply
- **Dimensions:** 35.6 x 17.8 x 7.2 mm

## Connectivity

WiFi 802.11b/g/n | Bluetooth 5.0 Classic + BLE

## Compatible Firmware

- arduino
- circuitpython
- micropython

## Components

- **ESP32 PICO ECO V3** (mcu): Dual-core Xtensa LX6 SiP with integrated 8MB flash, 2MB PSRAM, w.FL antenna port. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-pico-mini-02_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-itsybitsy-esp32-wfl&source=md-export)
- **NeoPixel RGB LED** (led): Onboard addressable RGB NeoPixel with power control. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=adafruit-itsybitsy-esp32-wfl&source=md-export)

## Protocols

- **I2C**: SDA=GPIO21, SCL=GPIO22
- **SPI**: MOSI=GPIO23, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | D0 | — | digital |
| GPIO1 | D1 | — | digital |
| GPIO2 | D2 | — | digital |
| GPIO3 | D3 | — | digital |
| GPIO4 | D4 | — | digital |
| GPIO5 | D5 (5V level) | — | digital |
| GPIO6 | D6 | — | digital |
| GPIO7 | D7 | — | digital |
| GPIO8 | D8 | — | digital |
| GPIO9 | D9 | — | digital |
| GPIO14 | A4 | — | analog, digital |
| GPIO15 | A3 | — | analog, digital |
| GPIO16 | A2 | — | analog, digital |
| GPIO17 | A1 | — | analog, digital |
| GPIO18 | A0 | — | analog, digital |
| GPIO21 | SDA | — | i2c-sda, digital |
| GPIO22 | SCL | — | i2c-scl, digital |
| GPIO23 | MOSI | — | spi-mosi, digital |
| GPIO36 | MISO | — | spi-miso, digital |
| GPIO37 | SCK | — | spi-sck, digital |
| GPIO43 | TX | — | uart-tx, digital |
| GPIO44 | RX | — | uart-rx, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5890&ref=openhardware.directory&product=adafruit-itsybitsy-esp32-wfl&source=md-export) — 14.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5890&ref=openhardware.directory&product=adafruit-itsybitsy-esp32-wfl&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-itsybitsy-esp32&ref=openhardware.directory&product=adafruit-itsybitsy-esp32-wfl&source=md-export)

## Tags

`adafruit`, `itsybitsy`, `esp32`, `wfl`, `external-antenna`, `circuitpython`, `psram`, `bt-classic`

## Certifications

FCC, RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-itsybitsy-esp32-wfl)

---

# LILYGO T5 E-Paper S3 Pro Lite

> A pocket-sized ESP32-S3 development board with a 4.7-inch capacitive touchscreen e-paper display (960×540, 16 grayscale), anti-glare glass, warm-toned backlight, MagSafe wireless charging, and comprehensive battery management.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$71.31
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C 2.0
- **Power:** 5V + LiPo
- **Dimensions:** 129 × 69 × 11mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio

## Components

- **ESP32-S3-WROOM-1** (mcu): Espressif ESP32-S3-WROOM-1 with dual-core Xtensa LX7 @ 240MHz, 16MB flash, 8MB PSRAM, WiFi 802.11 b/g/n, BLE 5.0, and USB OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro-lite&source=md-export)
- **ED047TC1** (display-driver): E Ink ED047TC1 4.7-inch e-paper display with 960×540 resolution, 16 grayscale levels, 235 PPI, and glass substrate with anti-glare coating. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT5S3-4.7-e-paper-PRO%2Fblob%2FH752-01%2Fhardware%2FED047TC1.pdf&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro-lite&source=md-export)
- **GT911** (touch-controller): Goodix GT911 capacitive touch controller with I2C interface (0x5D), 2-point touch on this board, gesture recognition, and adaptive frequency hopping. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.fortec-integrated.de%2Ffileadmin%2Fpdf%2Fprodukte%2FTouchcontroller%2FDDGroup%2FGT911_Datasheet.pdf&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro-lite&source=md-export)
- **TPS65185** (power-management): Texas Instruments TPS65185 single-chip PMIC for E Ink displays with programmable VCOM (0–5.11V, 9-bit), boost converters, charge pumps, and auto VCOM calibration. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftps65185.pdf&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro-lite&source=md-export)
- **BQ25896** (battery-charger): Texas Instruments BQ25896 I2C-controlled 3A battery charger (0x6B) with USB OTG 5V/2A output, 7-bit ADC monitoring, and system power path management. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2FBQ25896&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro-lite&source=md-export)
- **BQ27220** (battery-gauge): Texas Instruments BQ27220 fuel gauge (0x55) with CEDV algorithm providing state-of-charge, remaining capacity, voltage, temperature, and state-of-health over I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FBQ27220&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro-lite&source=md-export)
- **PCF85063** (rtc): NXP PCF85063 RTC (0x51) with integrated 32.768 kHz crystal, alarm function, I2C interface (400 kbit/s), and ultra-low power consumption for battery-backed timekeeping. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FPCF85063A.pdf&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro-lite&source=md-export)
- **PCA9535PW** (io-expander): NXP PCA9535PW 16-bit I/O expander (0x20) providing additional GPIO for e-ink power control, user button, and TPS65185 management signals. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nexperia.com%2Fproduct%2FPCA9535PW&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro-lite&source=md-export)

## Protocols

- **I2C**: SDA=GPIO39, SCL=GPIO40
- **SPI**: MOSI=GPIO13, MISO=GPIO21, SCLK=GPIO14

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot Button | — | digital-input, digital-output, strapping |
| GPIO1 | Free (LoRa RST on Pro) | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO2 | RTC Interrupt | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO3 | Touch INT | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO4 | E-Ink CKH | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO5 | E-Ink D0 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO6 | E-Ink D1 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO7 | E-Ink D2 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO8 | E-Ink D3 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO9 | Touch RST | — | digital-input, digital-output, adc, touch, pwm |
| GPIO10 | Free (LoRa IRQ on Pro) | — | digital-input, digital-output, adc, touch, pwm |
| GPIO11 | Backlight Enable | — | digital-input, digital-output, pwm |
| GPIO12 | SD Card CS | — | digital-input, digital-output, pwm |
| GPIO13 | SPI MOSI | — | digital-input, digital-output, pwm |
| GPIO14 | SPI SCLK | — | digital-input, digital-output, pwm |
| GPIO15 | E-Ink D4 | — | digital-input, digital-output, pwm |
| GPIO16 | E-Ink D5 | — | digital-input, digital-output, pwm |
| GPIO17 | E-Ink D6 | — | digital-input, digital-output, pwm |
| GPIO18 | E-Ink D7 | — | digital-input, digital-output, pwm |
| GPIO21 | SPI MISO | — | digital-input, digital-output, pwm |
| GPIO38 | PCA9535 Interrupt | — | digital-input, digital-output, pwm |
| GPIO39 | I2C SDA | — | digital-input, digital-output, pwm |
| GPIO40 | I2C SCL | — | digital-input, digital-output, pwm |
| GPIO41 | E-Ink STH | — | digital-input, digital-output, pwm |
| GPIO42 | E-Ink LEH | — | digital-input, digital-output, pwm |
| GPIO43 | Free (GPS TXD on Pro) | — | digital-input, digital-output, pwm |
| GPIO44 | Free (GPS RXD on Pro) | — | digital-input, digital-output, pwm |
| GPIO45 | E-Ink STV | — | digital-input, digital-output, strapping |
| GPIO46 | Free (LoRa CS on Pro) | — | digital-input, digital-output, strapping |
| GPIO47 | Free (LoRa BUSY on Pro) | — | digital-input, digital-output, pwm |
| GPIO48 | E-Ink CKV | — | digital-input, digital-output, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official Store](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft5-e-paper-s3-pro-lite&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro-lite&source=md-export) — $71.31

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft5-e-paper-s3-pro-lite&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro-lite&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT5S3-4.7-e-paper-PRO&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro-lite&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc%2Fget_started%2Fen%2FWearable%2FT5-E-Paper-S3-Pro%2FT5-E-Paper-S3-Pro.html&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro-lite&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT5S3-4.7-e-paper-PRO%2Ftree%2FH752-01%2Fhardware&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro-lite&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t5-e-paper-s3-pro-lite)

---

# LILYGO T-QT C6

> Tiny ESP32-C6 dev board with WiFi 6, BLE 5, Zigbee/Thread (802.15.4), 0.85" 128×128 touchscreen, LiPo battery charging, and breathing LED in a thumbnail-sized form factor.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$13.25
- **CPU:** RISC-V single-core @ 160MHz
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.0 | Zigbee Zigbee 3.0

## Compatible Firmware

- arduino
- esp-idf
- micropython
- esphome

## Components

- **ESP32-C6** (mcu): Single-core RISC-V at 160MHz with WiFi 6 (802.11ax), BLE 5.0, and IEEE 802.15.4 for Zigbee 3.0 and Thread. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-qt-c6&source=md-export)
- **GC9107** (display-driver): Compact TFT LCD driver supporting 128×128 resolution for small wearable and IoT displays. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-QT-C6&ref=openhardware.directory&product=lilygo-t-qt-c6&source=md-export)
- **ETA4662** (battery-charger): I2C LiPo charger with integrated power path management for portable battery-powered designs. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-QT-C6&ref=openhardware.directory&product=lilygo-t-qt-c6&source=md-export)

## Protocols

- **SPI**: CLK=GPIO6, MOSI=GPIO7, CS=GPIO14
- **I2C**: SDA=GPIO4, SCL=GPIO5
- **UART**: TX=GPIO16, RX=GPIO17

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO4 | I2C SDA | — | digital-input, digital-output |
| GPIO5 | I2C SCL | — | digital-input, digital-output |
| GPIO6 | SPI CLK | — | digital-output |
| GPIO7 | SPI MOSI | — | digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-qt-c6&ref=openhardware.directory&product=lilygo-t-qt-c6&source=md-export) — $13.25

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-qt-c6&ref=openhardware.directory&product=lilygo-t-qt-c6&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-QT-C6&ref=openhardware.directory&product=lilygo-t-qt-c6&source=md-export)

## Tags

`esp32-c6`, `wifi6`, `zigbee`, `thread`, `matter`, `tiny`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-qt-c6)

---

# LILYGO T-Encoder Pro

> ESP32-S3 smart rotary encoder knob with 1.2-inch round AMOLED display, capacitive touch, buzzer, vibration motor, and dual Qwiic connectors — ideal for smart home control and media interfaces.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$31.05
- **CPU:** ESP32-S3R8 Xtensa LX7 dual-core @ 240MHz
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio

## Components

- **ESP32-S3R8** (mcu): Espressif ESP32-S3R8 dual-core Xtensa LX7 at 240MHz with 8MB PSRAM, 2.4GHz WiFi, and Bluetooth 5 LE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-encoder-pro&source=md-export)
- **SH8601A** (display): 1.2-inch round AMOLED display with 390×390 resolution, SH8601A driver, QSPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-encoder-pro&ref=openhardware.directory&product=lilygo-t-encoder-pro&source=md-export)
- **CHSC5816** (touch): CHSC5816 capacitive touch controller with I2C interface for touch input on the AMOLED display. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-encoder-pro&ref=openhardware.directory&product=lilygo-t-encoder-pro&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **QSPI**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-encoder-pro&ref=openhardware.directory&product=lilygo-t-encoder-pro&source=md-export) — $31.05

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-encoder-pro&ref=openhardware.directory&product=lilygo-t-encoder-pro&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Encoder-Pro&ref=openhardware.directory&product=lilygo-t-encoder-pro&source=md-export)

## Tags

`esp32-s3`, `amoled`, `rotary-encoder`, `lilygo`, `wifi`, `ble5`, `smart-home`, `qwiic`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-encoder-pro)

---

# DFRobot FireBeetle 2 ESP32-P4 AI Vision Board

> ESP32-P4 dual-core RISC-V AI vision board at 360MHz with hardware H.264/JPEG encoding, MIPI CSI/DSI interfaces, ESP32-C6 WiFi 6 coprocessor, 32MB PSRAM, 16MB flash, PDM microphone, TF card slot, and 24 GPIO pins in a compact 25.4x60mm form factor.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** dev-board
- **Price:** ~$11.9
- **CPU:** ESP32-P4 RISC-V dual-core @ 360MHz + LP core @ 40MHz, FPU, H.264/JPEG HW encoder, ISP, AI extensions
- **RAM:** 768KB L2 Cache + 32KB LP SRAM
- **Flash:** 16MB
- **USB:** USB-C (dual: USB 2.0 OTG + USB CDC)
- **Power:** 5V
- **Dimensions:** 25.4 x 60mm

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.0

## Components

- **ESP32-P4** (mcu): Espressif ESP32-P4 with dual-core RISC-V at 360MHz, FPU, AI extensions, hardware H.264/JPEG encoding at 1080p, ISP, PPA, 768KB L2 cache. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-p4&source=md-export)
- **ESP32-C6** (mcu): Companion ESP32-C6 providing WiFi 6 (802.11ax) and Bluetooth 5 LE connectivity, offloading wireless from the P4 processor. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-p4&source=md-export)
- **PDM Microphone** (microphone): Built-in PDM microphone for audio capture, voice recognition, and speech processing. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_DFR1172_FireBeetle_2_Board_ESP32_P4&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-p4&source=md-export)

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2915.html&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-p4&source=md-export) — $11.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2915.html&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-p4&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_DFR1172_FireBeetle_2_Board_ESP32_P4&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-p4&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-p4&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-firebeetle-2-esp32-p4)

---

# Adafruit My Little Hacker ESP32-S2

> Child-oriented ESP32-S2 dev board with 4MB flash, 2MB PSRAM, 5 NeoPixels, microSD, I2S audio amplifier for speakers, USB-C, STEMMA QT, and AA battery or USB-C power support.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **CPU:** ESP32-S2
- **RAM:** 320KB
- **Flash:** 4MB
- **Power:** 5V via USB-C or 2x AA batteries

## Connectivity

WiFi 802.11b/g/n

## Compatible Firmware

- circuitpython
- micropython
- arduino
- esp-idf

## Components

- **ESP32-S2** (mcu): Single-core 240 MHz Xtensa LX7 with Wi-Fi 4, native USB, 320KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-my-little-hacker-esp32-s2&source=md-export)
- **MAX98357A** (audio): Maxim I2S Class D amplifier, up to 3W into 4-8 ohm speaker. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-reference-manual%2Freference-manuals%2FMAX98357A-MAX98357B.pdf&ref=openhardware.directory&product=adafruit-my-little-hacker-esp32-s2&source=md-export)
- **WS2812B NeoPixel** (led): Five addressable RGB NeoPixel LEDs for visual feedback. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=adafruit-my-little-hacker-esp32-s2&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO35, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | D0 | — | digital |
| GPIO1 | D1 | — | digital |
| GPIO3 | SDA | — | i2c-sda, digital |
| GPIO4 | SCL | — | i2c-scl, digital |
| GPIO8 | A5 | — | analog, digital |
| GPIO14 | A2 | — | analog, digital |
| GPIO15 | A3 | — | analog, digital |
| GPIO16 | A4 | — | analog, digital |
| GPIO17 | A0 | — | analog, digital |
| GPIO18 | A1 | — | analog, digital |
| GPIO35 | MOSI | — | spi-mosi, digital |
| GPIO36 | MISO | — | spi-miso, digital |
| GPIO37 | SCK | — | spi-sck, digital |
| GPIO43 | TX | — | uart-tx, digital |
| GPIO44 | RX | — | uart-rx, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5742&ref=openhardware.directory&product=adafruit-my-little-hacker-esp32-s2&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5742&ref=openhardware.directory&product=adafruit-my-little-hacker-esp32-s2&source=md-export)

## Tags

`adafruit`, `esp32-s2`, `education`, `neopixel`, `audio`, `beginner`, `circuitpython`, `i2s`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-my-little-hacker-esp32-s2)

---

# Adafruit ESP32-S3 Feather (4MB Flash, 2MB PSRAM)

> Feather-format ESP32-S3 board with 4 MB flash and 2 MB PSRAM, dual-core 240 MHz, native USB-C, BLE 5, WiFi, STEMMA QT, LiPoly charging, and MAX17048 battery monitor.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$17.5
- **CPU:** Xtensa LX7 dual-core @ 240 MHz (ESP32-S3)
- **RAM:** 512 KB SRAM + 2 MB PSRAM
- **Flash:** 4MB
- **Power:** 5V + LiPo
- **Dimensions:** 52.3 × 22.7 × 7.2 mm

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- circuitpython
- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core 240 MHz Xtensa LX7 with 512 KB SRAM, 2 MB PSRAM, native USB OTG, WiFi, and BLE 5. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-esp32-s3-feather-4mb-psram&source=md-export)
- **MAX17048** (battery-charger): Maxim MAX17048 Li-Ion/LiPo fuel gauge providing state-of-charge via I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX17048-MAX17049.pdf&ref=openhardware.directory&product=adafruit-esp32-s3-feather-4mb-psram&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: SCK=GPIO36, MOSI=GPIO35, MISO=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO17 | A0 | — | ADC |
| GPIO18 | A1 | — | ADC |
| GPIO14 | A2 | — | ADC |
| GPIO15 | A3 | — | ADC |
| GPIO16 | A4 | — | ADC |
| GPIO8 | A5 | — | ADC, touch |
| GPIO5 | D5 | — | GPIO, PWM |
| GPIO6 | D6 | — | GPIO, PWM |
| GPIO9 | D9 | — | GPIO, PWM |
| GPIO10 | D10 | — | GPIO, PWM |
| GPIO11 | D11 | — | GPIO, PWM |
| GPIO12 | D12 | — | GPIO, PWM |
| GPIO13 | D13 | — | GPIO, PWM |
| GPIO36 | SCK | — | SPI |
| GPIO35 | MOSI | — | SPI |
| GPIO37 | MISO | — | SPI |
| GPIO3 | SDA (STEMMA QT) | — | I2C, STEMMA QT |
| GPIO4 | SCL (STEMMA QT) | — | I2C, STEMMA QT |
| GPIO43 | TX | — | UART |
| GPIO44 | RX | — | UART |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5477&ref=openhardware.directory&product=adafruit-esp32-s3-feather-4mb-psram&source=md-export) — 17.5

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_feather_esp32s3_4mbflash_2mbpsram%2F&ref=openhardware.directory&product=adafruit-esp32-s3-feather-4mb-psram&source=md-export)
- [Arduino ESP32](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Farduino-esp32&ref=openhardware.directory&product=adafruit-esp32-s3-feather-4mb-psram&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5477&ref=openhardware.directory&product=adafruit-esp32-s3-feather-4mb-psram&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-ESP32-S3-Feather-PCB&ref=openhardware.directory&product=adafruit-esp32-s3-feather-4mb-psram&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-esp32-s3-feather&ref=openhardware.directory&product=adafruit-esp32-s3-feather-4mb-psram&source=md-export)

## Tags

`esp32-s3`, `feather`, `stemma-qt`, `circuitpython`, `native-usb`, `wifi`, `ble`, `lipo`, `psram`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-esp32-s3-feather-4mb-psram)

---

# BigTreeTech Panda Touch

> 5-inch 800x480 IPS WiFi touchscreen for Bambu Lab X1, P1, and A1 series 3D printers. ESP32-S3 based, 16MB flash, 8MB PSRAM, built-in battery for portable use, supports up to 4 printers simultaneously.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Display
- **CPU:** ESP32-S3R8 Xtensa 32-bit LX7 dual-core @ 240MHz
- **RAM:** 8MB PSRAM
- **Flash:** 16MB
- **Power:** USB-C 5V

## Connectivity

WiFi true

## Compatible Firmware

- Klipper

## Components

- **ESP32-S3R8** (mcu): Espressif ESP32-S3R8 Xtensa LX7 dual-core @ up to 240MHz with 8MB PSRAM, 2.4GHz WiFi and Bluetooth 5 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=bigtreetech-panda-touch&source=md-export)
- **5-inch IPS 800x480** (display): 5-inch IPS display, 800x480 resolution, 16.7M colors, capacitive touch — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fbttwiki.com%2FPandaTouch.html&ref=openhardware.directory&product=bigtreetech-panda-touch&source=md-export)

## Protocols

- **WiFi**
- **I2C**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-panda-touch-5-display-for-bambu-lab-printers&ref=openhardware.directory&product=bigtreetech-panda-touch&source=md-export)

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FPandaTouch&ref=openhardware.directory&product=bigtreetech-panda-touch&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-panda-touch-5-display-for-bambu-lab-printers&ref=openhardware.directory&product=bigtreetech-panda-touch&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.bttwiki.com%2FPandaTouch.html&ref=openhardware.directory&product=bigtreetech-panda-touch&source=md-export)

## Tags

`3d-printing`, `display`, `touchscreen`, `bambu-lab`, `esp32-s3`, `wifi`, `5-inch`, `ips`, `bigtreetech`, `battery`, `wireless-control`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-panda-touch)

---

# BigTreeTech K-Touch

> 5-inch 800x480 IPS WiFi touchscreen controller for Klipper printers. ESP32-S3 based, 16MB flash, 8MB PSRAM, built-in battery for 30 minutes portable use, supports up to 50 Klipper printers.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Display
- **CPU:** ESP32-S3R8 Xtensa 32-bit LX7 dual-core @ 240MHz
- **RAM:** 8MB PSRAM
- **Flash:** 16MB
- **Power:** USB-C 5V (magnetic dock)

## Connectivity

WiFi true

## Compatible Firmware

- Klipper

## Components

- **ESP32-S3R8** (mcu): Espressif ESP32-S3R8 Xtensa LX7 dual-core @ up to 240MHz with 8MB PSRAM, 2.4GHz WiFi — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=bigtreetech-k-touch&source=md-export)
- **5-inch IPS 800x480** (display): 5-inch IPS display, 800x480 resolution, 16.7M colors, capacitive touch — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.bttwiki.com%2FKlipper%2520Touch.html&ref=openhardware.directory&product=bigtreetech-k-touch&source=md-export)

## Protocols

- **WiFi**
- **I2C**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-k-touch&ref=openhardware.directory&product=bigtreetech-k-touch&source=md-export)

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FK-Touch&ref=openhardware.directory&product=bigtreetech-k-touch&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-k-touch&ref=openhardware.directory&product=bigtreetech-k-touch&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.bttwiki.com%2FKlipper%2520Touch.html&ref=openhardware.directory&product=bigtreetech-k-touch&source=md-export)

## Tags

`3d-printing`, `display`, `touchscreen`, `klipper`, `esp32-s3`, `wifi`, `5-inch`, `ips`, `bigtreetech`, `battery`, `wireless-control`, `portable`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-k-touch)

---

# LILYGO T-Circle S3

> Compact ESP32-S3 board with a 0.75" round 160×160 TFT LCD (GC9D01N), 16MB flash, 8MB PSRAM, WiFi, and BLE 5 for wearable watchface and circular display applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$23.68
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- micropython

## Components

- **ESP32-S3R8** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-circle-s3&source=md-export)
- **GC9D01N** (display-driver): Circular TFT LCD display driver supporting 160×160 resolution for round watch-style displays. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Circle-S3&ref=openhardware.directory&product=lilygo-t-circle-s3&source=md-export)

## Protocols

- **SPI**: CLK=GPIO12, MOSI=GPIO11, CS=GPIO10, DC=GPIO9
- **I2C**: SDA=GPIO4, SCL=GPIO5

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO11 | SPI MOSI (Display) | — | digital-output |
| GPIO12 | SPI CLK (Display) | — | digital-output |
| GPIO4 | I2C SDA | — | digital-input, digital-output |
| GPIO5 | I2C SCL | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-circle-s3&ref=openhardware.directory&product=lilygo-t-circle-s3&source=md-export) — $23.68

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-circle-s3&ref=openhardware.directory&product=lilygo-t-circle-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Circle-S3&ref=openhardware.directory&product=lilygo-t-circle-s3&source=md-export)

## Tags

`esp32-s3`, `round-display`, `circular`, `tft`, `wearable`, `watchface`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-circle-s3)

---

# LILYGO T-Lion

> ESP32-WROVER development board with 0.96-inch OLED display, five-way directional button, single 18650 battery holder, 8MB PSRAM, WiFi, and BLE 4.2 — a compact handheld IoT controller in a slim form factor.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$11.23
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro-USB
- **Power:** 5V + Li-Ion 18650

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf
- micropython

## Components

- **ESP32-WROVER** (mcu): ESP32-WROVER with 4MB flash, 8MB PSRAM, 240MHz dual-core, WiFi and BLE 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-lion&source=md-export)
- **SSD1306** (display): 128x64 monochrome OLED display driven by SSD1306 via I2C — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t-lion&source=md-export)
- **5-Way Button** (input): Multi-directional (up/down/left/right/press) navigation control for menu-driven interfaces — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-lion&source=md-export)
- **CH9102** (usb-serial): USB to serial converter for programming and battery charging at 5V/1A — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH9102.html&ref=openhardware.directory&product=lilygo-t-lion&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **I2S**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-lion&ref=openhardware.directory&product=lilygo-t-lion&source=md-export) — $11.23

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-lion&ref=openhardware.directory&product=lilygo-t-lion&source=md-export)

## Tags

`esp32`, `oled`, `battery`, `18650`, `portable`, `controller`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-lion)

---

# LILYGO T-Camera Plus S3

> ESP32-S3 camera development board with 8MB PSRAM, 16MB Flash, onboard microphone, MAX98357A I2S amplifier, speaker output, and choice of OV2640 or OV5640 camera sensor for audio-visual IoT applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$30.06
- **CPU:** ESP32-S3R8 Dual-core Xtensa LX7 240MHz
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 5.0 + Mesh

## Compatible Firmware

- arduino
- platformio

## Components

- **ESP32-S3R8** (mcu): Dual-core Xtensa LX7 240MHz with 8MB PSRAM, Wi-Fi and BLE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-camera-plus-s3&source=md-export)
- **OV2640** (camera): 2MP CMOS image sensor supporting QVGA to UXGA resolution — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2Fcam_module%2FOV2640DS.pdf&ref=openhardware.directory&product=lilygo-t-camera-plus-s3&source=md-export)
- **OV5640** (camera): 5MP auto-focus CMOS image sensor for higher resolution imaging — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fdatasheets%2FSensors%2FLightImaging%2FOV5640_datasheet.pdf&ref=openhardware.directory&product=lilygo-t-camera-plus-s3&source=md-export)
- **MAX98357A** (other): I2S digital audio amplifier with built-in D-class output for speaker drive — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX98357A-MAX98357B.pdf&ref=openhardware.directory&product=lilygo-t-camera-plus-s3&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **I2S**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-camera-plus-s3&ref=openhardware.directory&product=lilygo-t-camera-plus-s3&source=md-export) — $30.06

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-camera-plus-s3&ref=openhardware.directory&product=lilygo-t-camera-plus-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-CameraPlus-S3&ref=openhardware.directory&product=lilygo-t-camera-plus-s3&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-camera-plus-s3&source=md-export)

## Tags

`esp32-s3`, `camera`, `ov2640`, `ov5640`, `audio`, `speaker`, `microphone`, `wifi`, `bluetooth`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-camera-plus-s3)

---

# Heltec WiFi LoRa 32 V4

> ESP32-S3 based LoRa development board with built-in 0.96" OLED display, SX1262 LoRa transceiver, WiFi, BLE 5.0, USB-C, and LiPo battery charging. One of the most popular boards for Meshtastic.

## Quick Facts

- **Brand:** Heltec
- **Board Type:** dev-board
- **Price:** ~$30.99
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM
- **Flash:** 8 MB
- **GPIO:** 36 pins
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- meshtastic
- micropython

## Components

- **ESP32-S3FN8** (mcu): Dual-core Xtensa LX7 microcontroller at 240 MHz with WiFi and BLE 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-wifi-lora-32-v4&source=md-export)
- **SX1262** (radio): Semtech LoRa transceiver, 433/868/915 MHz, +21 dBm TX power — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=heltec-wifi-lora-32-v4&source=md-export)
- **SSD1306** (display): 0.96" 128x64 monochrome OLED display controller — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=heltec-wifi-lora-32-v4&source=md-export)
- **CP2102** (interface): USB-to-UART bridge for serial programming — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=heltec-wifi-lora-32-v4&source=md-export)

## Protocols

- **UART**
- **I2C**
- **SPI**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fheltec-wifi-lora-32-v4&ref=openhardware.directory&product=heltec-wifi-lora-32-v4&source=md-export) — $28.95
- [Heltec Official](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwifi-lora-32-v3%2F&ref=openhardware.directory&product=heltec-wifi-lora-32-v4&source=md-export) — $18.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwifi-lora-32-v3%2F&ref=openhardware.directory&product=heltec-wifi-lora-32-v4&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHeltec-Aaron-Lee%2FWiFi_Kit_series&ref=openhardware.directory&product=heltec-wifi-lora-32-v4&source=md-export)

## Tags

`esp32-s3`, `lora`, `meshtastic`, `oled`, `sx1262`, `heltec`, `iot`, `lorawan`

---
[View full device page](https://openhardware.directory/s/1370/heltec-wifi-lora-32-v4)

---

# M5Stack Cardputer-Adv

> Credit-card-sized ESP32-S3 handheld computer with 56-key mechanical keyboard, 1.14" IPS display, BMI270 IMU, ES8311 audio codec, 1W speaker, MEMS microphone, IR transmitter, 1750mAh battery, Grove I2C port, and microSD slot.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$29.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz with RISC-V ULP co-processor
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **USB:** USB-C (OTG + Serial/JTAG)
- **Power:** 5V USB-C or 1750mAh Li-ion battery
- **Dimensions:** 84 × 54 × 20mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0 + Mesh

## Compatible Firmware

- arduino
- esp-idf
- uiflow
- platformio

## Components

- **ESP32-S3FN8** (mcu): Espressif ESP32-S3FN8 dual-core Xtensa LX7 at 240MHz with 8MB flash, WiFi 802.11 b/g/n, BLE 5.0, and RISC-V ULP co-processor. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-cardputer-adv&source=md-export)
- **ST7789V2** (display-driver): Sitronix ST7789V2 TFT display controller driving the 1.14-inch 240×135 IPS LCD. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.newhavendisplay.com%2Fappnotes%2Fdatasheets%2FLCDs%2FST7789V.pdf&ref=openhardware.directory&product=m5stack-cardputer-adv&source=md-export)
- **ES8311** (audio-codec): Everest Semiconductor ES8311 low-power mono audio codec with ADC and DAC for microphone input and headphone/speaker output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5Cardputer%2Fblob%2Fmain%2Fdocs%2Fdatasheet%2FES8311.pdf&ref=openhardware.directory&product=m5stack-cardputer-adv&source=md-export)
- **NS4150B** (audio-amplifier): Novosense NS4150B mono Class-D audio amplifier driving the built-in 1W speaker. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2206010030_Novosense-Micro-NS4150B_C3012802.pdf&ref=openhardware.directory&product=m5stack-cardputer-adv&source=md-export)
- **BMI270** (accelerometer): Bosch BMI270 ultra-low-power 6-axis inertial measurement unit with accelerometer and gyroscope for motion sensing. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bmi270-ds000.pdf&ref=openhardware.directory&product=m5stack-cardputer-adv&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **I2S**
- **Grove**
- **IR**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stack-cardputer-adv-esp32-s3a&ref=openhardware.directory&product=m5stack-cardputer-adv&source=md-export) — €32.55
- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stack-cardputer-adv-version-esp32-s3&ref=openhardware.directory&product=m5stack-cardputer-adv&source=md-export) — $29.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FCardputerAdv&ref=openhardware.directory&product=m5stack-cardputer-adv&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5Cardputer&ref=openhardware.directory&product=m5stack-cardputer-adv&source=md-export)

## Tags

`esp32-s3`, `m5stack`, `keyboard`, `handheld`, `portable`, `imu`, `speaker`, `microphone`, `ir-transmitter`, `grove`, `iot`, `hacking-tool`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-cardputer-adv)

---

# LILYGO T-RGB

> ESP32-S3 board with a circular 2.1\" or 2.8\" ST7701S RGB display (480×480) and capacitive touch — perfect for smart home controllers, round-display clocks, and interactive dashboards.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$30.04
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C 2.0
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio
- esphome

## Components

- **ESP32-S3R8** (mcu): Espressif ESP32-S3R8 dual-core Xtensa LX7 at 240MHz with 8MB integrated PSRAM, WiFi, BLE 5.0, and USB OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-rgb&source=md-export)
- **ST7701S** (display-driver): Sitronix ST7701S RGB TFT controller for the 2.1" or 2.8" 480×480 circular display via 3-wire SPI and 18-bit RGB interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdl.espressif.com%2FAE%2Fesp-iot-solution%2FST7701S_SPEC_V1.4.pdf&ref=openhardware.directory&product=lilygo-t-rgb&source=md-export)
- **GT911** (touch-controller): Goodix GT911 5-point capacitive touch controller on 2.8" full-circle variant with I2C and gesture recognition. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.goodix.com%2Fen%2Fproduct%2Ftouch%2Ftouch_ic%2FGT911&ref=openhardware.directory&product=lilygo-t-rgb&source=md-export)

## Protocols

- **SPI**: CS=GPIO1, CLK=GPIO2, DATA=GPIO3
- **I2C**: SDA=GPIO4, SCL=GPIO8
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot Button | — | digital-input, strapping |
| GPIO4 | Battery ADC / I2C SDA | — | digital-input, adc, touch |
| GPIO8 | I2C SCL | — | digital-output, touch |
| GPIO43 | UART TX | — | digital-output |
| GPIO44 | UART RX | — | digital-input |
| GPIO45 | Free GPIO | — | digital-input, digital-output, strapping |
| GPIO46 | Free GPIO | — | digital-input, digital-output, strapping |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-rgb&ref=openhardware.directory&product=lilygo-t-rgb&source=md-export) — $30.04

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-rgb&ref=openhardware.directory&product=lilygo-t-rgb&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-RGB&ref=openhardware.directory&product=lilygo-t-rgb&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-rgb&source=md-export)

## Tags

`esp32-s3`, `round-display`, `circular`, `touch`, `lilygo`, `rgb`, `wifi`, `ble5`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-rgb)

---

# LILYGO T-Watch 2021

> Programmable ESP32 smartwatch with 1.3-inch round GC9A01 IPS touchscreen (240×240), BMA423 accelerometer, vibration motor, RTC, WiFi, and BLE 4.2 — open-source and fully programmable with Arduino or MicroPython.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$25.62
- **CPU:** ESP32
- **Flash:** 4MB
- **USB:** Micro-USB (via T-U2T programmer)
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- platformio

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 processor running at 240MHz with integrated WiFi and Bluetooth 4.2/BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-watch-2021&source=md-export)
- **GC9A01** (display): 1.3-inch round IPS LCD with capacitive touch at 240×240 resolution. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.buydisplay.com%2Fdownload%2Fic%2FGC9A01A.pdf&ref=openhardware.directory&product=lilygo-t-watch-2021&source=md-export)
- **BMA423** (sensor): Three-axis accelerometer with built-in pedometer, step counter, and activity recognition. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bma423-ds000.pdf&ref=openhardware.directory&product=lilygo-t-watch-2021&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **I2S**
- **CAN**
- **SDIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-watch-2021&ref=openhardware.directory&product=lilygo-t-watch-2021&source=md-export) — $25.62

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-watch-2021&ref=openhardware.directory&product=lilygo-t-watch-2021&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Watch-2021&ref=openhardware.directory&product=lilygo-t-watch-2021&source=md-export)

## Tags

`esp32`, `smartwatch`, `wearable`, `iot`, `arduino`, `micropython`, `ble`, `wifi`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-watch-2021)

---

# LILYGO T-Journal

> Compact ESP32-PICO-D4 camera board with OV2640 2MP sensor, 0.91-inch SSD1306 OLED display, fisheye or normal lens options, WiFi, BLE, and LiPo battery support — a minimal wireless camera module for IoT vision projects.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$14.15
- **CPU:** ESP32-PICO-D4
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro-USB
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-PICO-D4** (mcu): ESP32 SiP with 4MB flash, 520KB SRAM, 240MHz dual-core Xtensa LX6, WiFi and BLE 4.2 in minimal package — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-journal&source=md-export)
- **OV2640** (camera): OV2640 2-megapixel camera sensor with fisheye or normal lens option for wide-angle or standard field of view — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2Fcam_module%2FOV2640DS.pdf&ref=openhardware.directory&product=lilygo-t-journal&source=md-export)
- **SSD1306** (display): 128x32 monochrome OLED display for status and preview output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t-journal&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-journal&ref=openhardware.directory&product=lilygo-t-journal&source=md-export) — $14.15

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-journal&ref=openhardware.directory&product=lilygo-t-journal&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2Fesp32-camera-series&ref=openhardware.directory&product=lilygo-t-journal&source=md-export)

## Tags

`esp32`, `camera`, `ov2640`, `oled`, `wifi-camera`, `fisheye`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-journal)

---

# LILYGO T-Connect Pro

> ESP32-S3 three-board stack with SX1262 LoRa, CAN, RS485, RS232, Ethernet (W5500), relay, capacitive touch LCD, and DC input — a versatile industrial IoT gateway with long-range wireless.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$60.74
- **CPU:** ESP32-S3-R8 Xtensa LX7 dual-core @ 240MHz
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5-12V DC

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0 | Ethernet 10/100 Mbps W5500

## Compatible Firmware

- arduino
- platformio
- micropython

## Components

- **ESP32-S3R8** (mcu): Espressif ESP32-S3-R8 dual-core Xtensa LX7 at 240MHz with 8MB PSRAM, 2.4GHz WiFi, and Bluetooth 5 LE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-connect-pro&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver inside HPD16A module, covering 433/868/915/920 MHz with +22 dBm output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-connect-pro&source=md-export)
- **W5500** (interface): WIZnet W5500 hardwired TCP/IP SPI Ethernet controller providing 10/100 Mbps wired network connectivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wiznet.io%2Fwp-content%2Fuploads%2Fwiznethome%2FChip%2FW5500%2FDocument%2FW5500_DS_V109E.pdf&ref=openhardware.directory&product=lilygo-t-connect-pro&source=md-export)
- **RS485/RS232/CAN** (interface): RS485, RS232, and CAN bus interfaces for connecting to industrial sensors, PLCs, and vehicle networks. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Connect-Pro&ref=openhardware.directory&product=lilygo-t-connect-pro&source=md-export)

## Protocols

- **RS-485**
- **RS-232**
- **CAN**
- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-connect-pro&ref=openhardware.directory&product=lilygo-t-connect-pro&source=md-export) — $60.74

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-connect-pro&ref=openhardware.directory&product=lilygo-t-connect-pro&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Connect-Pro&ref=openhardware.directory&product=lilygo-t-connect-pro&source=md-export)

## Tags

`esp32-s3`, `lora`, `can-bus`, `rs485`, `rs232`, `ethernet`, `industrial`, `lilygo`, `iot-gateway`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-connect-pro)

---

# SenseCAP Indicator D1

> Dual-MCU IoT development platform featuring ESP32-S3 and RP2040 processors with a 4-inch capacitive touchscreen, WiFi, BLE, optional LoRa, and multiple Grove sensor connectors for IoT prototyping.

## Quick Facts

- **Brand:** Seeed Studio
- **Board Type:** dev-board
- **Price:** ~$64.9
- **CPU:** ESP32-S3 + RP2040
- **Flash:** 8MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- micropython
- squareline-studio

## Components

- **ESP32-S3** (MCU): Espressif ESP32-S3 with Xtensa LX7 dual-core processor at 240MHz, 8MB PSRAM, WiFi and BLE 5.0 connectivity, drives the display and handles wireless communication — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=sensecap-indicator-d1&source=md-export)
- **RP2040** (MCU): Raspberry Pi RP2040 with dual ARM Cortex-M0+ cores at 133MHz, handles Grove sensor peripherals and real-time I/O processing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=sensecap-indicator-d1&source=md-export)
- **4-inch IPS LCD (480x480)** (Display): 4-inch IPS LCD with 480x480 resolution and capacitive touch overlay, driven via SPI by the ESP32-S3, supports LVGL graphics library — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2FSenseCAP_Indicator%2F&ref=openhardware.directory&product=sensecap-indicator-d1&source=md-export)
- **SCD41** (Sensor): Sensirion SCD41 photoacoustic CO2 sensor with built-in temperature and humidity sensing, measurement range 400-5000 ppm — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsensirion.com%2Fmedia%2Fdocuments%2F48C4B7FB%2F64C134E7%2FSensirion_SCD4x_Datasheet.pdf&ref=openhardware.directory&product=sensecap-indicator-d1&source=md-export)
- **AHT20** (Sensor): ASAIR AHT20 digital temperature and humidity sensor with I2C interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fasairsensors.com%2Fwp-content%2Fuploads%2F2021%2F09%2FData-Sheet-AHT20-Humidity-and-Temperature-Sensor-ASAIR-V1.0.03.pdf&ref=openhardware.directory&product=sensecap-indicator-d1&source=md-export)
- **SGP40** (Sensor): Sensirion SGP40 digital VOC sensor for indoor air quality monitoring with I2C interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsensirion.com%2Fmedia%2Fdocuments%2F296373BB%2F6203C5DF%2FSensirion_Gas_Sensors_Datasheet_SGP40.pdf&ref=openhardware.directory&product=sensecap-indicator-d1&source=md-export)
- **Buzzer** (Audio): Built-in piezoelectric buzzer for audio alerts, notifications, and alarm feedback — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2FSenseCAP_Indicator%2F&ref=openhardware.directory&product=sensecap-indicator-d1&source=md-export)
- **Grove I2C** (Connector): Standard Grove 4-pin connector with I2C interface for connecting compatible Seeed Studio sensors and modules — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2FGrove_System%2F&ref=openhardware.directory&product=sensecap-indicator-d1&source=md-export)
- **Grove GPIO/ADC** (Connector): Standard Grove 4-pin connector with GPIO and ADC interface for analog and digital sensor expansion — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2FGrove_System%2F&ref=openhardware.directory&product=sensecap-indicator-d1&source=md-export)
- **microSD slot** (Storage): microSD card slot for data logging, storage expansion, and firmware updates — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2FSenseCAP_Indicator%2F&ref=openhardware.directory&product=sensecap-indicator-d1&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **GPIO**
- **ADC**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fseeed-studio-sensecap-indicator-d1-4-inch-touch-screen-iot-dev-platform&ref=openhardware.directory&product=sensecap-indicator-d1&source=md-export) — $64.90
- [Seeed Studio](https://openhardware.directory/r?to=https%3A%2F%2Fwww.seeedstudio.com%2FSenseCAP-Indicator-D1-p-5643.html&ref=openhardware.directory&product=sensecap-indicator-d1&source=md-export) — $64.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.seeedstudio.com%2FSenseCAP-Indicator-D1-p-5643.html&ref=openhardware.directory&product=sensecap-indicator-d1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FSeeed-Solution%2FSenseCAP_Indicator_ESP32&ref=openhardware.directory&product=sensecap-indicator-d1&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2FSenseCAP_Indicator%2F&ref=openhardware.directory&product=sensecap-indicator-d1&source=md-export)

## Tags

`esp32-s3`, `rp2040`, `touchscreen`, `iot-platform`, `grove`, `lvgl`, `seeed-studio`, `dual-mcu`

---
[View full device page](https://openhardware.directory/s/1370/sensecap-indicator-d1)

---

# DFRobot ESP32-S3 AI Camera

> ESP32-S3 AI camera module with 2MP wide-angle night vision sensor, I2S speaker and microphone, ambient light sensor, WiFi/BLE 5.0, and edge AI inference support in a 42x42mm package.

## Quick Facts

- **Brand:** DFRobot
- **Price:** ~$18.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V USB-C / 3.7-15V DC (VIN)
- **Dimensions:** 42 × 42mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-S3R8** (mcu): Espressif ESP32-S3R8 with dual-core Xtensa LX7 at 240MHz, 8MB PSRAM, 16MB flash, WiFi 802.11 b/g/n, BLE 5.0, and AI vector extensions. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-esp32-s3-ai-camera&source=md-export)
- **OV3660** (camera): OmniVision OV3660 2MP CMOS image sensor with 160-degree FOV, F/2.0 aperture, and 940nm infrared sensitivity for day/night vision. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ovt.com%2Fproducts%2Fov3660%2F&ref=openhardware.directory&product=dfrobot-esp32-s3-ai-camera&source=md-export)
- **MAX98357A** (audio-amplifier): Analog Devices MAX98357A I2S digital input Class-D mono amplifier for speaker output, no external MCLK required. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX98357A-MAX98357B.pdf&ref=openhardware.directory&product=dfrobot-esp32-s3-ai-camera&source=md-export)
- **LTR-308** (sensor): Lite-On LTR-308 I2C ambient light sensor for automatic IR illumination control based on ambient light levels. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Foptoelectronics.liteon.com%2Fen-global%2Fled%2Fled-component%2FDetail%2F926&ref=openhardware.directory&product=dfrobot-esp32-s3-ai-camera&source=md-export)

## Protocols

- **UART** (UART0): TX=IO44, RX=IO43

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| IO47 | IR LED Control | — | digital-input, digital-output |
| IO44 | UART TX / Gravity Connector | — | digital-input, digital-output |
| IO43 | UART RX / Gravity Connector | — | digital-input, digital-output |
| IO3 | Onboard LED | — | digital-input, digital-output, pwm |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2899.html&ref=openhardware.directory&product=dfrobot-esp32-s3-ai-camera&source=md-export) — $18.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2899.html&ref=openhardware.directory&product=dfrobot-esp32-s3-ai-camera&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FDFRobot%2Fopenai-realtime-embedded-sdk&ref=openhardware.directory&product=dfrobot-esp32-s3-ai-camera&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_DFR1154_ESP32_S3_AI_CAM&ref=openhardware.directory&product=dfrobot-esp32-s3-ai-camera&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-esp32-s3-ai-camera&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-esp32-s3-ai-camera)

---

# FeatherS2 Neo ESP32-S2

> ESP32-S2 Feather-format board by Unexpected Maker with 4MB flash, 2MB PSRAM, 5×5 RGB LED matrix, LiPo charging, and STEMMA QT — designed for colorful wearable and IoT projects.

## Quick Facts

- **Brand:** Unexpected Maker
- **Board Type:** feather
- **Price:** ~$24.5
- **CPU:** ESP32-S2
- **RAM:** 320KB
- **Flash:** 4MB
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11b/g/n

## Compatible Firmware

- circuitpython
- micropython
- arduino
- esp-idf

## Components

- **ESP32-S2** (mcu): Single-core 240 MHz Xtensa LX7 with Wi-Fi 4, native USB, 320KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=feathers2-neo&source=md-export)
- **WS2812B 5x5 RGB LED Matrix** (led): 5×5 grid of 25 addressable RGB LEDs with user-controlled LDO power. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=feathers2-neo&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO35, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | D1 | — | digital |
| GPIO3 | SDA | — | i2c-sda, digital |
| GPIO4 | SCL | — | i2c-scl, digital |
| GPIO5 | D5 | — | digital, pwm |
| GPIO6 | D6 | — | digital, pwm |
| GPIO7 | D7 | — | digital, pwm |
| GPIO8 | D8 | — | digital, pwm |
| GPIO9 | D9 | — | digital, pwm |
| GPIO10 | D10 | — | digital, pwm |
| GPIO11 | D11 | — | digital |
| GPIO12 | D12 | — | digital |
| GPIO14 | A2 | — | analog, digital |
| GPIO15 | A3 | — | analog, digital |
| GPIO17 | A0 | — | analog, digital |
| GPIO18 | A1 | — | analog, digital |
| GPIO34 | VBUS Detect | — | digital |
| GPIO35 | MOSI | — | spi-mosi, digital |
| GPIO36 | MISO | — | spi-miso, digital |
| GPIO37 | SCK | — | spi-sck, digital |
| GPIO40 | RGB LED Data | — | digital |
| GPIO43 | TX | — | uart-tx, digital |
| GPIO44 | RX | — | uart-rx, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5629&ref=openhardware.directory&product=feathers2-neo&source=md-export) — 24.5

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Funexpectedmaker_feathers2%2F&ref=openhardware.directory&product=feathers2-neo&source=md-export)
- [Manufacturer Docs](https://openhardware.directory/r?to=https%3A%2F%2Funexpectedmaker.com%2Ffeathers2-neo&ref=openhardware.directory&product=feathers2-neo&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5629&ref=openhardware.directory&product=feathers2-neo&source=md-export)
- [schematic](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5629%2FFeatherS2_Neo_P1_Schematic.pdf&ref=openhardware.directory&product=feathers2-neo&source=md-export)
- [pinout](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5629%2F5629-pinout.png&ref=openhardware.directory&product=feathers2-neo&source=md-export)

## Tags

`feather`, `esp32-s2`, `unexpected-maker`, `rgb-matrix`, `circuitpython`, `wearable`, `lipo`

---
[View full device page](https://openhardware.directory/s/1370/feathers2-neo)

---

# Oui-Spy

> ESP32-S3 based multi-mode BLE detection and security research tool with integrated piezo buzzer, MMCX antenna connector, and seven swappable firmware modes for surveillance detection, drone tracking, and RF direction finding.

## Quick Facts

- **Brand:** Colonel Panic's Hack Shack
- **Board Type:** security-tool
- **Price:** ~$85
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **GPIO:** 11 pins
- **USB:** USB-C 2.0
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio
- esp-idf

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core Xtensa LX7 SoC with WiFi 4, BLE 5.0, and USB OTG — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=oui-spy&source=md-export)
- **piezo-buzzer** (buzzer): PWM-driven piezoelectric buzzer for variable-frequency audio alerts and proximity notification tones — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.murata.com%2Fen-us%2Fproducts%2Fsound%2Fpiezoelectric-buzzers&ref=openhardware.directory&product=oui-spy&source=md-export)
- **WS2812B** (led-driver): Addressable RGB LED for status indication and firmware mode identification — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=oui-spy&source=md-export)

## Protocols

- **UART**
- **I2C**
- **SPI**
- **PWM**
- **ADC**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fcolonel_panic%2Foui-spy%2F&ref=openhardware.directory&product=oui-spy&source=md-export) — $85.00
- [Colonel Panic Tech](https://openhardware.directory/r?to=https%3A%2F%2Fcolonelpanic.tech%2F&ref=openhardware.directory&product=oui-spy&source=md-export) — $85.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fcolonelpanic.tech%2F&ref=openhardware.directory&product=oui-spy&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fcolonelpanichacks%2Foui-spy&ref=openhardware.directory&product=oui-spy&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hackster.io%2Fcolonelpanic%2Foui-spy-now-and-beyond-1f9c9a&ref=openhardware.directory&product=oui-spy&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=oui-spy&source=md-export)

## Tags

`esp32-s3`, `ble-scanner`, `security-tool`, `surveillance-detection`, `drone-detection`, `foxhunter`, `oui-tracking`, `counter-surveillance`, `direction-finding`, `colonel-panic`

---
[View full device page](https://openhardware.directory/s/1370/oui-spy)

---

# DFRobot UNIHIKER K10

> All-in-one AI coding board for STEM education with ESP32-S3, 2.8-inch touchscreen, 2MP camera, microphone, speaker, environmental sensors, WiFi, Bluetooth 5, and pre-loaded AI models for vision, voice, and TinyML.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** dev-board
- **Price:** ~$28.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V via USB-C or PH2.0 battery port
- **Dimensions:** 51.6 x 83 x 11mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-S3** (mcu): ESP32-S3 Xtensa LX7 dual-core microcontroller at 240MHz with WiFi and Bluetooth 5 for AI edge computing. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-unihiker-k10&source=md-export)
- **OV2640** (camera): Onboard 2-megapixel camera for computer vision, face detection, pet recognition, and QR code scanning. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2FOV2640_DS.pdf&ref=openhardware.directory&product=dfrobot-unihiker-k10&source=md-export)

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2904.html&ref=openhardware.directory&product=dfrobot-unihiker-k10&source=md-export) — 28.90
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FUNIHIKER-Coding-Board-STEM-Beginners%2Fdp%2FB0FK5C68NX&ref=openhardware.directory&product=dfrobot-unihiker-k10&source=md-export) — 28.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2904.html&ref=openhardware.directory&product=dfrobot-unihiker-k10&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.unihiker.com%2Fwiki%2FK10%2F&ref=openhardware.directory&product=dfrobot-unihiker-k10&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-unihiker-k10)

---

# Adafruit QT Py ESP32 Pico

> QT Py-sized classic ESP32 board with ESP32-PICO-V3-02, 8 MB flash, 2 MB PSRAM, WiFi, dual-core, Bluetooth Classic + BLE, STEMMA QT, and 13 GPIO — without native USB.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$14.95
- **CPU:** Xtensa LX6 dual-core @ 240 MHz (ESP32-PICO-V3-02)
- **RAM:** 520 KB SRAM + 2 MB PSRAM
- **Flash:** 8MB
- **Power:** 5V
- **Dimensions:** 22 × 17.9 × 5.9 mm

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- circuitpython
- arduino
- micropython
- esp-idf

## Components

- **ESP32-PICO-V3-02** (mcu): Espressif ESP32-PICO-V3-02 SiP with dual-core 240 MHz Xtensa LX6, 8 MB Flash, 2 MB PSRAM, WiFi, and BT/BLE 4.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-pico-v3-02_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-qt-py-esp32-pico&source=md-export)

## Protocols

- **I2C**: SDA=GPIO1, SCL=GPIO2
- **I2C (STEMMA QT)**: SDA=GPIO1, SCL=GPIO2
- **SPI**: MOSI=GPIO5, MISO=GPIO6, SCK=GPIO7
- **UART**: TX=GPIO44, RX=GPIO43
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO9 | A0 | — | ADC, touch |
| GPIO10 | A1 | — | ADC, touch |
| GPIO17 | A2 | — | ADC |
| GPIO18 | A3 | — | ADC |
| GPIO1 | SDA (STEMMA QT) | — | I2C, STEMMA QT, touch |
| GPIO2 | SCL (STEMMA QT) | — | I2C, STEMMA QT, touch |
| GPIO5 | MOSI | — | SPI, touch |
| GPIO6 | MISO | — | SPI, touch |
| GPIO7 | SCK | — | SPI, touch |
| GPIO44 | TX | — | UART |
| GPIO43 | RX | — | UART |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5395&ref=openhardware.directory&product=adafruit-qt-py-esp32-pico&source=md-export) — 14.95

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_qtpy_esp32_pico%2F&ref=openhardware.directory&product=adafruit-qt-py-esp32-pico&source=md-export)
- [Arduino ESP32](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Farduino-esp32&ref=openhardware.directory&product=adafruit-qt-py-esp32-pico&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5395&ref=openhardware.directory&product=adafruit-qt-py-esp32-pico&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-QT-Py-ESP32-PICO-PCB&ref=openhardware.directory&product=adafruit-qt-py-esp32-pico&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-qt-py-esp32-pico&ref=openhardware.directory&product=adafruit-qt-py-esp32-pico&source=md-export)

## Tags

`esp32`, `esp32-pico`, `qt-py`, `stemma-qt`, `circuitpython`, `wifi`, `bluetooth`, `ble`, `tiny`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-qt-py-esp32-pico)

---

# Adafruit Metro ESP32-S2

> Arduino Uno-compatible WiFi dev board with ESP32-S2 single-core @ 240MHz, 4MB Flash, 2MB PSRAM, native USB-C, STEMMA QT, LiPoly charging, MAX17048 fuel gauge, barrel jack, and UNO shield compatibility.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$24.95
- **CPU:** Xtensa LX7 single-core @ 240MHz (ESP32-S2)
- **RAM:** 320KB SRAM + 2MB PSRAM
- **Flash:** 4MB SPI Flash
- **Power:** 5V via USB-C, 6-12V barrel jack, or LiPoly battery
- **Dimensions:** 53.2 x 72.0 x 14.8mm

## Connectivity

WiFi 802.11 b/g/n @ 2.4GHz (ESP32-S2) | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- circuitpython
- arduino
- esp-idf

## Components

- **ESP32-S2** (mcu): Espressif ESP32-S2 single-core Xtensa LX7 @ 240MHz, WiFi 802.11 b/g/n, native USB 1.1 OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-metro-esp32-s2&source=md-export)
- **MAX17048** (battery-gauge): Maxim MAX17048 1-cell Li+ fuel gauge, I2C, reports state-of-charge via ModelGauge algorithm. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.maximintegrated.com%2Fen%2Fds%2FMAX17048-MAX17049.pdf&ref=openhardware.directory&product=adafruit-metro-esp32-s2&source=md-export)

## Protocols

- **I2C**: SDA=GPIO33, SCL=GPIO34
- **SPI**: MOSI=GPIO35, MISO=GPIO37, SCK=GPIO36
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**: D-=GPIO19, D+=GPIO20
- **PWM**
- **ADC**
- **DAC**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | A0 | — | ADC, GPIO |
| GPIO2 | A1 | — | ADC, GPIO |
| GPIO3 | A2 | — | ADC, GPIO |
| GPIO4 | A3 | — | ADC, GPIO |
| GPIO33 | A4/SDA | — | I2C, ADC, GPIO |
| GPIO34 | A5/SCL | — | I2C, ADC, GPIO |
| GPIO38 | D0/RX | — | UART, GPIO |
| GPIO39 | D1/TX_alt | — | UART, GPIO |
| GPIO5 | D2 | — | GPIO, PWM |
| GPIO6 | D3/PWM | — | PWM, GPIO |
| GPIO9 | D4 | — | GPIO |
| GPIO10 | D5/PWM | — | PWM, GPIO |
| GPIO11 | D6/PWM | — | PWM, GPIO |
| GPIO12 | D7 | — | GPIO |
| GPIO13 | D8 | — | GPIO |
| GPIO14 | D9/PWM | — | PWM, GPIO |
| GPIO15 | D10/PWM/CS | — | SPI, PWM, GPIO |
| GPIO35 | D11/MOSI | — | SPI, GPIO |
| GPIO37 | D12/MISO | — | SPI, GPIO |
| GPIO36 | D13/SCK | — | SPI, GPIO |
| GPIO43 | TX | — | UART, GPIO |
| GPIO44 | RX | — | UART, GPIO |
| GPIO19 | USB_D- | — | USB, GPIO |
| GPIO20 | USB_D+ | — | USB, GPIO |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4775&ref=openhardware.directory&product=adafruit-metro-esp32-s2&source=md-export) — 24.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4775&ref=openhardware.directory&product=adafruit-metro-esp32-s2&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4775&ref=openhardware.directory&product=adafruit-metro-esp32-s2&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-metro-esp32-s2&ref=openhardware.directory&product=adafruit-metro-esp32-s2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_Metro_ESP32S2&ref=openhardware.directory&product=adafruit-metro-esp32-s2&source=md-export)

## Tags

`metro`, `esp32-s2`, `wifi`, `adafruit`, `psram`, `circuitpython`, `usb-c`, `arduino-shield`, `stemma-qt`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-metro-esp32-s2)

---

# Adafruit HUZZAH32 ESP32 Breakout

> Minimal ESP32 breakout board with dual-core Xtensa LX6 at 240MHz, 520KB SRAM, 4MB flash, WiFi 802.11 b/g/n, Bluetooth Classic + BLE, 12 ADC, 2 DAC. No USB converter or battery charger — requires external FTDI/CP2104 for programming.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$13.5
- **CPU:** Espressif ESP32 dual-core Xtensa LX6
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **Power:** 3.3V via regulated pin or 5V input
- **Dimensions:** 44mm × 25.5mm × 4.8mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython

## Components

- **ESP32-WROOM-32** (mcu): Dual-core Xtensa LX6 at 240 MHz, 520 KB SRAM, 4 MB flash, 802.11 b/g/n WiFi, BT Classic + BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-huzzah32-esp32-breakout&source=md-export)

## Protocols

- **I2C**: SDA=GPIO21, SCL=GPIO22
- **SPI**: MOSI=GPIO23, MISO=GPIO19, SCK=GPIO18, SS=GPIO5
- **UART**: TX=GPIO1, RX=GPIO3
- **WiFi**
- **Bluetooth**
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | TX | — | digital-input, digital-output |
| GPIO3 | RX | — | digital-input, digital-output |
| GPIO21 | SDA | — | digital-input, digital-output |
| GPIO22 | SCL | — | digital-input, digital-output |
| GPIO23 | MOSI | — | digital-input, digital-output |
| GPIO19 | MISO | — | digital-input, digital-output |
| GPIO18 | SCK | — | digital-input, digital-output |
| GPIO5 | SS | — | digital-input, digital-output |
| GPIO4 | GPIO | — | digital-input, digital-output, touch |
| GPIO12 | GPIO | — | digital-input, digital-output, touch, pwm |
| GPIO13 | GPIO | — | digital-input, digital-output, touch, pwm |
| GPIO14 | GPIO | — | digital-input, digital-output, touch, pwm |
| GPIO15 | GPIO | — | digital-input, digital-output, touch, pwm |
| GPIO25 | GPIO/DAC | — | digital-input, digital-output, analog-input, dac |
| GPIO26 | GPIO/DAC | — | digital-input, digital-output, analog-input, dac |
| GPIO32 | GPIO/ADC | — | digital-input, digital-output, analog-input, touch |
| GPIO33 | GPIO/ADC | — | digital-input, digital-output, analog-input, touch |
| GPIO34 | ADC | — | analog-input |
| GPIO35 | ADC | — | analog-input |
| GPIO36 | ADC | — | analog-input |
| GPIO39 | ADC | — | analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4172&ref=openhardware.directory&product=adafruit-huzzah32-esp32-breakout&source=md-export) — 13.5

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4172&ref=openhardware.directory&product=adafruit-huzzah32-esp32-breakout&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4172&ref=openhardware.directory&product=adafruit-huzzah32-esp32-breakout&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fhuzzah32-esp32-breakout-board&ref=openhardware.directory&product=adafruit-huzzah32-esp32-breakout&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-HUZZAH32-PCB&ref=openhardware.directory&product=adafruit-huzzah32-esp32-breakout&source=md-export)

## Tags

`esp32`, `wifi`, `bluetooth`, `ble`, `breakout`, `adafruit`, `huzzah32`, `minimal`, `embedded`, `iot`

## Certifications

FCC, CE, RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-huzzah32-esp32-breakout)

---

# M5Stack Basic Core V2.7

> Compact ESP32 IoT dev kit with 2.0" IPS LCD (320x240), 16MB flash, microSD, speaker, 110mAh battery, and three Grove ports in a stackable 54mm square enclosure.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$39.9
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, hardware crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V
- **Dimensions:** 54 x 54 x 18mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 4.2, BLE

## Compatible Firmware

- arduino
- esp-idf
- uiflow
- micropython
- platformio
- esphome

## Components

- **ESP32-D0WDQ6-V3** (mcu): Espressif ESP32 SoC with dual-core Xtensa LX6 at 240MHz, WiFi and Bluetooth 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-basic-core-v2-7&source=md-export)
- **ILI9342C** (display-driver): 320x240 IPS LCD driver with 853nit brightness — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fdatasheet%2Fcore%2FILI9342C-ILITEK.pdf&ref=openhardware.directory&product=m5stack-basic-core-v2-7&source=md-export)
- **IP5306** (battery-charger): LiPo battery charging and 5V boost output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fdatasheet%2Fcore%2FIIC_IP5306_REG_V1.4.pdf&ref=openhardware.directory&product=m5stack-basic-core-v2-7&source=md-export)

## Protocols

- **I2C**: SDA=GPIO21, SCL=GPIO22
- **SPI**: MOSI=GPIO23, MISO=GPIO19, CLK=GPIO18
- **UART**: TX=GPIO17, RX=GPIO16

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO21 | I2C SDA / Grove Port A | — | digital-input, digital-output, pwm |
| GPIO22 | I2C SCL / Grove Port A | — | digital-input, digital-output, pwm |
| GPIO36 | ADC / Grove Port B | — | adc, input-only |
| GPIO26 | DAC / Grove Port B | — | digital-input, digital-output, dac, adc, pwm |
| GPIO25 | DAC1 / Speaker | — | digital-input, digital-output, dac, pwm |
| GPIO17 | UART TX / Grove Port C | — | digital-input, digital-output, pwm |
| GPIO16 | UART RX / Grove Port C | — | digital-input, digital-output, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fesp32-basic-core-lot-development-kit-v2-7&ref=openhardware.directory&product=m5stack-basic-core-v2-7&source=md-export) — $39.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fesp32-basic-core-lot-development-kit-v2-7&ref=openhardware.directory&product=m5stack-basic-core-v2-7&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5Stack&ref=openhardware.directory&product=m5stack-basic-core-v2-7&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2Fbasic_v2.7&ref=openhardware.directory&product=m5stack-basic-core-v2-7&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-basic-core-v2-7&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fschematic%2FCore%2FM5-Core-Schematic%2820171206%29.pdf&ref=openhardware.directory&product=m5stack-basic-core-v2-7&source=md-export)

## Tags

`esp32`, `m5stack`, `lcd`, `iot`, `grove`, `stackable`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-basic-core-v2-7)

---

# M5Stack Station-Bat

> Industrial ESP32 controller with 1.14" IPS LCD, 6 Grove ports, INA3221 power monitor, MPU6886 IMU, RTC, 7x SK6812 LEDs, dual 18650 battery holders, USB-A power output, and 16MB flash.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** industrial-controller
- **Price:** ~$65
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, hardware crypto
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **USB:** USB-C,USB-A
- **Power:** 5V via USB-C or dual 18650 batteries
- **Dimensions:** 88 x 65 x 35mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 4.2, BLE

## Compatible Firmware

- arduino
- esp-idf
- platformio
- uiflow
- micropython

## Components

- **ESP32-D0WDQ6-V3** (mcu): Espressif ESP32 SoC dual-core Xtensa LX6 at 240MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-station-bat&source=md-export)
- **ST7789V2** (display-driver): 240x135 IPS LCD driver, SPI interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fdatasheet%2Funit%2Flcd%2FST7789V2_SPEC_V1.0.pdf&ref=openhardware.directory&product=m5stack-station-bat&source=md-export)
- **AXP192** (battery-charger): Advanced PMIC for LiPo charging and power path management — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fdatasheet%2Fcore%2FAXP192_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-station-bat&source=md-export)
- **MPU6886** (accelerometer): 6-axis MEMS IMU for motion sensing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fdatasheet%2Fcore%2FMPU-6886-000193%2Bv1.1_GHIC_en.pdf&ref=openhardware.directory&product=m5stack-station-bat&source=md-export)
- **BM8563** (rtc): Low-power RTC for timekeeping — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F1811152241_GATEMODE-BM8563_C269877.pdf&ref=openhardware.directory&product=m5stack-station-bat&source=md-export)
- **INA3221** (current-sensor): 3-channel I2C current and voltage monitor for power management — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fina3221.pdf&ref=openhardware.directory&product=m5stack-station-bat&source=md-export)
- **SK6812** (led-driver): 7 individually addressable RGB LEDs for status indication — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F1138%2FSK6812%2BLED%2Bdatasheet%2B.pdf&ref=openhardware.directory&product=m5stack-station-bat&source=md-export)

## Protocols

- **I2C**: SDA=GPIO32, SCL=GPIO33
- **SPI**: CLK=GPIO18, MOSI=GPIO23
- **UART**: TX0=GPIO1, RX0=GPIO3

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO32 | I2C SDA | — | digital-input, digital-output, adc, pwm |
| GPIO33 | I2C SCL | — | digital-input, digital-output, adc, pwm |
| GPIO25 | DAC1 | — | digital-input, digital-output, dac, adc, pwm |
| GPIO26 | DAC2 | — | digital-input, digital-output, dac, adc, pwm |
| GPIO36 | ADC Input | — | adc, input-only |
| GPIO35 | ADC Input | — | adc, input-only |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stack-station-esp32-iot-development-kit-battery-version&ref=openhardware.directory&product=m5stack-station-bat&source=md-export) — $65.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stack-station-esp32-iot-development-kit-battery-version&ref=openhardware.directory&product=m5stack-station-bat&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5Station&ref=openhardware.directory&product=m5stack-station-bat&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2Fstation_bat&ref=openhardware.directory&product=m5stack-station-bat&source=md-export)

## Tags

`esp32`, `m5stack`, `industrial`, `power-monitor`, `imu`, `grove`, `battery`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-station-bat)

---

# LILYGO T-Camera S3

> ESP32-S3 camera development board with OV2640 2MP sensor, 0.96-inch OLED display, 16MB flash, 8MB PSRAM, WiFi, and BLE 5.0 — a ready-to-use platform for WiFi streaming cameras and computer vision projects.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$17.31
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C 2.0
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esphome
- platformio

## Components

- **ESP32-S3FN16R8** (mcu): Espressif ESP32-S3FN16R8 dual-core Xtensa LX7 at 240MHz with 16MB flash, 8MB PSRAM, WiFi, BLE 5.0, and USB OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-camera-s3&source=md-export)
- **OV2640** (camera): OmniVision OV2640 2-megapixel UXGA image sensor with JPEG compression and DVP interface for live video streaming. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2Fcam_module%2FOV2640DS.pdf&ref=openhardware.directory&product=lilygo-t-camera-s3&source=md-export)
- **SSD1306** (display-driver): Solomon Systech SSD1306 OLED driver for the 0.96-inch 128×64 status display via I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t-camera-s3&source=md-export)

## Protocols

- **I2C**: SDA=GPIO21, SCL=GPIO22
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot Button | — | digital-input, strapping |
| GPIO21 | I2C SDA (OLED) | — | digital-input, digital-output |
| GPIO22 | I2C SCL (OLED) | — | digital-output |
| GPIO38 | Free GPIO | — | digital-input, digital-output |
| GPIO40 | Free GPIO | — | digital-input, digital-output |
| GPIO43 | UART TX | — | digital-output |
| GPIO44 | UART RX | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-camera-s3&ref=openhardware.directory&product=lilygo-t-camera-s3&source=md-export) — $17.31

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-camera-s3&ref=openhardware.directory&product=lilygo-t-camera-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-Cam-ESP32S3&ref=openhardware.directory&product=lilygo-t-camera-s3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-camera-s3&source=md-export)

## Tags

`esp32-s3`, `camera`, `ov2640`, `lilygo`, `wifi`, `oled`, `streaming`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-camera-s3)

---

# LILYGO T-Dongle C5

> Compact USB dongle with ESP32-C5 featuring dual-band WiFi 6 (2.4/5GHz), Bluetooth 5, 802.15.4, 0.96-inch LCD, TF card slot, and 16MB flash — the first LILYGO dongle with WiFi 6 support.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$13.02
- **CPU:** ESP32-C5 RISC-V single-core @ 240MHz
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-A
- **Power:** 5V

## Connectivity

WiFi WiFi 6 (802.11ax) 2.4/5GHz | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio

## Components

- **ESP32-C5** (mcu): Espressif ESP32-C5 RISC-V SoC with dual-band WiFi 6 (2.4/5GHz 802.11ax), Bluetooth 5, and 802.15.4 (Thread/Zigbee). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c5_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-dongle-c5&source=md-export)
- **ST7735** (display): 0.96-inch ST7735 IPS LCD with 80×160 resolution, 65K full color, 4-wire SPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7735.pdf&ref=openhardware.directory&product=lilygo-t-dongle-c5&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-dongle-c5&ref=openhardware.directory&product=lilygo-t-dongle-c5&source=md-export) — $13.02

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-dongle-c5&ref=openhardware.directory&product=lilygo-t-dongle-c5&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Dongle-C5&ref=openhardware.directory&product=lilygo-t-dongle-c5&source=md-export)

## Tags

`esp32-c5`, `wifi6`, `lilygo`, `usb-dongle`, `ble5`, `lcd`, `802-15-4`, `risc-v`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-dongle-c5)

---

# LILYGO T-Touch Bar

> ESP32-S3 touch-sensitive bar display board with 8MB PSRAM, 16MB Flash, Wi-Fi, and Bluetooth 5, available in LED and AMOLED display variants for building custom HMI panels, smart home controls, and interactive displays.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$25.5
- **CPU:** ESP32-S3R8 Xtensa LX7 Dual-core
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 5.0 + Mesh

## Compatible Firmware

- arduino
- platformio

## Components

- **ESP32-S3R8** (mcu): Dual-core Xtensa LX7 240MHz with 8MB PSRAM, Wi-Fi and Bluetooth 5 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-touch-bar&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-touch-bar&ref=openhardware.directory&product=lilygo-t-touch-bar&source=md-export) — $25.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-touch-bar&ref=openhardware.directory&product=lilygo-t-touch-bar&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Touch_Bar&ref=openhardware.directory&product=lilygo-t-touch-bar&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-touch-bar&source=md-export)

## Tags

`esp32-s3`, `touch`, `amoled`, `led-display`, `hmi`, `smart-panel`, `wifi`, `bluetooth`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-touch-bar)

---

# Sonoff POW Elite 16A

> ESP32-based WiFi smart switch with high-accuracy power monitoring via CSE7766, 16A relay, LCD display, and DIN-rail mounting. Flashable with Tasmota for local energy tracking and home automation.

## Quick Facts

- **Brand:** Sonoff
- **Board Type:** relay-module
- **Price:** ~$19.9
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **Power:** 100-240V AC

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- eWeLink
- tasmota

## Components

- **ESP32** (Microcontroller): Dual-core Xtensa LX6 microcontroller at 240MHz with integrated WiFi 802.11 b/g/n and Bluetooth 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=sonoff-pow-elite-16a&source=md-export)
- **16A Relay** (Relay): Single-pole single-throw relay rated for 16A at 240V AC for switching high-power household loads — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fdiy-smart-switches%2Fpow-elite%2F&ref=openhardware.directory&product=sonoff-pow-elite-16a&source=md-export)
- **CSE7766** (Sensor): High-accuracy single-phase energy measurement chip providing voltage, current, active power, and energy readings via UART — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffccid.io%2Fpdf.php%3Fid%3D3499946&ref=openhardware.directory&product=sonoff-pow-elite-16a&source=md-export)
- **LCD Display** (Display): Segment LCD panel showing real-time voltage, current, power, and cumulative energy consumption — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fdiy-smart-switches%2Fpow-elite%2F&ref=openhardware.directory&product=sonoff-pow-elite-16a&source=md-export)
- **AC-DC Converter** (Power Supply): Integrated 100-240V AC to 3.3V DC converter powering the ESP32 and relay circuits — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fdiy-smart-switches%2Fpow-elite%2F&ref=openhardware.directory&product=sonoff-pow-elite-16a&source=md-export)

## Protocols

- **WiFi 802.11 b/g/n**
- **Bluetooth 4.2**
- **MQTT**
- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fdiy-smart-switches%2Fpow-elite%2F&ref=openhardware.directory&product=sonoff-pow-elite-16a&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Ftemplates.blakadder.com%2Fsonoff_POWR316D.html&ref=openhardware.directory&product=sonoff-pow-elite-16a&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Farendst%2FTasmota&ref=openhardware.directory&product=sonoff-pow-elite-16a&source=md-export)

## Tags

`esp32`, `wifi`, `tasmota`, `power-monitoring`, `energy-meter`, `din-rail`, `smart-switch`, `home-automation`, `sonoff`, `lcd-display`

---
[View full device page](https://openhardware.directory/s/1370/sonoff-pow-elite-16a)

---

# BigTreeTech KNOMI 2

> 1.28-inch round 240x240 LCD display for Voron StealthBurner toolhead. ESP32 MCU with WiFi and Bluetooth LE, shows print status, temperatures, and progress with customizable animated UI.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Display
- **CPU:** ESP32 dual-core Xtensa LX6 @ 240MHz
- **RAM:** 8MB PSRAM
- **Flash:** 16MB
- **Power:** 5V/1A (DC 5-24V input)

## Connectivity

WiFi true | Bluetooth true

## Compatible Firmware

- Klipper

## Components

- **ESP32** (mcu): Espressif ESP32 dual-core Xtensa LX6 @ 240MHz with 2.4GHz WiFi and Bluetooth 5 LE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=bigtreetech-knomi-2&source=md-export)
- **GC9A01** (display-driver): Galaxycore GC9A01 SPI LCD driver for 1.28-inch 240x240 circular displays — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fdatasheet%2FLCD_en_PDF%2FGC9A01A.pdf&ref=openhardware.directory&product=bigtreetech-knomi-2&source=md-export)

## Protocols

- **SPI**
- **WiFi**
- **I2C**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-knomi-2-for-voron-stealthburner&ref=openhardware.directory&product=bigtreetech-knomi-2&source=md-export)

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FKNOMI&ref=openhardware.directory&product=bigtreetech-knomi-2&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-knomi-2-for-voron-stealthburner&ref=openhardware.directory&product=bigtreetech-knomi-2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.bttwiki.com%2FKNOMI2.html&ref=openhardware.directory&product=bigtreetech-knomi-2&source=md-export)

## Tags

`3d-printing`, `display`, `klipper`, `voron`, `stealthburner`, `esp32`, `round-display`, `1.28-inch`, `toolhead`, `bigtreetech`, `wifi`, `ble`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-knomi-2)

---

# M5Stack Dial

> ESP32-S3 smart rotary knob with 1.28" round GC9A01 touch display (240x240), rotary encoder, RFID reader (WS1850S), RTC (BM8563), buzzer, and 2 Grove ports for IoT control interfaces.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$22.7
- **CPU:** Xtensa LX7 dual-core @ 240MHz
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **USB:** USB-C
- **Power:** 5V
- **Dimensions:** 51 × 51 × 32.3mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- uiflow

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core Xtensa LX7 at 240MHz with 8MB flash, 8MB PSRAM, WiFi 802.11 b/g/n and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-dial&source=md-export)
- **GC9A01** (display-driver): GC9A01 TFT controller driving the 1.28-inch 240×240 round IPS display with SPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.buydisplay.com%2Fdownload%2Fic%2FGC9A01A.pdf&ref=openhardware.directory&product=m5stack-dial&source=md-export)
- **WS1850S** (mcu): WS1850S 13.56MHz contactless reader/writer module for NFC and RFID card applications, compatible with MFRC522. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.alldatasheet.com%2Fdatasheet-pdf%2Fview%2F1160022%2FETC%2FWS1850S.html&ref=openhardware.directory&product=m5stack-dial&source=md-export)
- **BM8563** (rtc): BM8563 RTC with I2C interface, alarm, and timer functions for timekeeping and sleep scheduling. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2305061436_GATEMODE-BM8563EMA_C5129976.pdf&ref=openhardware.directory&product=m5stack-dial&source=md-export)
- **Rotary Encoder** (mcu): Built-in incremental rotary encoder for precise rotational input and dial control. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FM5Dial&ref=openhardware.directory&product=m5stack-dial&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **Grove**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stackdial&ref=openhardware.directory&product=m5stack-dial&source=md-export) — €39.80
- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stack-dial-esp32-s3-smart-rotary-knob-w-1-28-round-touch-screen&ref=openhardware.directory&product=m5stack-dial&source=md-export) — $22.70

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FM5Dial&ref=openhardware.directory&product=m5stack-dial&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5Dial&ref=openhardware.directory&product=m5stack-dial&source=md-export)

## Tags

`esp32-s3`, `m5stack`, `rotary-encoder`, `rfid`, `touchscreen`, `round-display`, `grove`, `iot`, `smart-home`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-dial)

---

# Waveshare RoArm-M1

> ESP32-based 5-DOF desktop robotic arm with high-torque serial bus servos, WiFi/Bluetooth control, motion recording, inverse kinematics, and ROS 2 support. Carbon fiber and aluminum construction.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** robotic-arm
- **Price:** ~$299.99
- **CPU:** ESP32-WROOM-32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Type-C
- **Power:** 12V 5A DC

## Connectivity

WiFi 2.4GHz | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- ros2
- micropython
- esp-idf

## Components

- **ESP32-WROOM-32** (MCU): Espressif ESP32 dual-core Xtensa LX6 microcontroller with integrated WiFi and Bluetooth — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-roarm-m1&source=md-export)
- **ST3215 Serial Bus Servo (x5)** (Servo): Feetech ST3215 TTL serial bus servo with 30kg.cm torque, 12-bit magnetic encoder feedback, and 360-degree rotation capability — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.feetechrc.com%2Fst3215.html&ref=openhardware.directory&product=waveshare-roarm-m1&source=md-export)
- **OLED Screen** (Display): Onboard OLED screen for real-time arm status and parameter display — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRoArm-M1&ref=openhardware.directory&product=waveshare-roarm-m1&source=md-export)
- **RGB LED** (LED): Addressable RGB LED for visual state feedback and notifications — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRoArm-M1&ref=openhardware.directory&product=waveshare-roarm-m1&source=md-export)

## Protocols

- **UART**
- **I2C**
- **HTTP/JSON**
- **ESP-NOW**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Waveshare Official](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Froarm-m1.htm&ref=openhardware.directory&product=waveshare-roarm-m1&source=md-export) — $299.99
- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwaveshare-roarm-m1-desktop-robotic-arm&ref=openhardware.directory&product=waveshare-roarm-m1&source=md-export) — $379.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Froarm-m1.htm&ref=openhardware.directory&product=waveshare-roarm-m1&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRoArm-M1&ref=openhardware.directory&product=waveshare-roarm-m1&source=md-export)

## Tags

`robotic-arm`, `esp32`, `ros2`, `arduino`, `wifi`, `desktop-robot`, `servo`, `waveshare`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-roarm-m1)

---

# CircuitMess ByteBoi 2.0

> DIY retro game console kit powered by ESP32 with TFT color display, speaker, microSD card slot, and RGB LED. Build it, play pre-loaded games, then code your own.

## Quick Facts

- **Brand:** circuitmess
- **Board Type:** game-console
- **Price:** ~$228
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro-USB
- **Power:** LiPo battery

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- circuitblocks

## Components

- **ESP32-WROOM-32** (mcu): Espressif ESP32-WROOM-32 module with dual-core Xtensa LX6 at 240MHz, WiFi 802.11 b/g/n, BLE 4.2, 520KB SRAM, and 4MB flash. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=circuitmess-byteboi-2-0&source=md-export)
- **ST7735S** (display-driver): Sitronix ST7735S TFT LCD controller driving the game console's color display over SPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7735.pdf&ref=openhardware.directory&product=circuitmess-byteboi-2-0&source=md-export)

## Protocols

- **SPI (Display)**: SCK=TFT_Sck, MOSI=TFT_Mosi, CS=TFT_Cs, DC=TFT_Dc, RST=TFT_Rst
- **SPI (SD Card)**: SCK=SD_Sck, MISO=SD_Miso, MOSI=SD_Mosi, CS=SD_Cs
- **I2C**: SDA=I2C_Sda, SCL=I2C_Scl
- **Shift Register**: DATA=ShiftSda, CLOCK=ShiftScl, LOAD=ShiftPl

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [CircuitMess](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitmess.com%2Fproducts%2Fbyteboi-2-0&ref=openhardware.directory&product=circuitmess-byteboi-2-0&source=md-export) — €209.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitmess.com%2Fproducts%2Fbyteboi-2-0&ref=openhardware.directory&product=circuitmess-byteboi-2-0&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FCircuitMess%2FByteBoi-Firmware&ref=openhardware.directory&product=circuitmess-byteboi-2-0&source=md-export)

## Tags

`circuitmess`, `game-console`, `esp32`, `diy-kit`, `retro`, `stem`

---
[View full device page](https://openhardware.directory/s/1370/circuitmess-byteboi-2-0)

---

# FeatherS3 ESP32-S3

> Pro ESP32-S3 Feather-form-factor board by Unexpected Maker — dual-core 240 MHz LX7, 16 MB Flash, 8 MB PSRAM, WiFi, BLE 5, 21 GPIO, 2× STEMMA connectors, dual LDOs, LiPo charging.

## Quick Facts

- **Brand:** Unexpected Maker
- **Board Type:** dev-board
- **Price:** ~$22.5
- **CPU:** Xtensa LX7 dual-core @ 240 MHz (ESP32-S3)
- **RAM:** 512 KB SRAM + 8 MB PSRAM
- **Flash:** 16MB
- **Power:** 5V + LiPo

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth Bluetooth 5.0 + Mesh

## Compatible Firmware

- circuitpython
- micropython
- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core 240 MHz Xtensa LX7 with WiFi, BLE 5, native USB, and vector AI instructions. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=feathers3-esp32-s3&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO11, MISO=GPIO12, SCK=GPIO13
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | D1 | — | ADC, GPIO, touch |
| GPIO2 | D2 | — | ADC, GPIO, touch |
| GPIO3 | SDA | — | I2C, ADC, touch |
| GPIO4 | SCL | — | I2C, ADC, touch |
| GPIO5 | D5 | — | ADC, GPIO, touch |
| GPIO6 | D6 | — | ADC, GPIO, touch |
| GPIO7 | D7 | — | ADC, GPIO, touch |
| GPIO8 | D8 | — | ADC, GPIO, touch |
| GPIO9 | D9 | — | ADC, GPIO, touch |
| GPIO10 | D10 | — | ADC, GPIO, touch |
| GPIO11 | MOSI | — | SPI, GPIO |
| GPIO12 | MISO | — | SPI, GPIO |
| GPIO13 | SCK | — | SPI, GPIO |
| GPIO36 | D36 | — | GPIO |
| GPIO37 | D37 | — | GPIO |
| GPIO38 | D38 | — | GPIO |
| GPIO43 | TX | — | UART |
| GPIO44 | RX | — | UART |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5399&ref=openhardware.directory&product=feathers3-esp32-s3&source=md-export) — 22.5

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Funexpectedmaker_feathers3%2F&ref=openhardware.directory&product=feathers3-esp32-s3&source=md-export)
- [Arduino ESP32](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Farduino-esp32&ref=openhardware.directory&product=feathers3-esp32-s3&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5399&ref=openhardware.directory&product=feathers3-esp32-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FUnexpectedMaker%2Ffeathers3&ref=openhardware.directory&product=feathers3-esp32-s3&source=md-export)
- [manufacturer](https://openhardware.directory/r?to=https%3A%2F%2Funexpectedmaker.com%2Ffeathers3&ref=openhardware.directory&product=feathers3-esp32-s3&source=md-export)

## Tags

`esp32-s3`, `unexpected-maker`, `feathers3`, `feather`, `circuitpython`, `wifi`, `ble`, `psram`, `lipo`, `stemma-qt`

---
[View full device page](https://openhardware.directory/s/1370/feathers3-esp32-s3)

---

# M5Stack AtomS3R

> Ultra-compact ESP32-S3 dev board (24x24mm) with 0.85" IPS LCD, BMI270 IMU, BMM150 magnetometer, 8MB PSRAM, IR transmitter, LP5562 RGB LED driver, and Grove port for IoT and robotics.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$17.5
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector instructions, HW crypto
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **USB:** USB-C (OTG)
- **Power:** 5V
- **Dimensions:** 24 x 24 x 12.9mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- platformio
- uiflow
- esphome
- micropython

## Components

- **ESP32-S3-PICO-1-N8R8** (mcu): Espressif ESP32-S3 System-in-Package with 8MB flash and 8MB PSRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-pico-1_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-atoms3r&source=md-export)
- **BMI270** (accelerometer): Bosch 6-axis IMU with accelerometer and gyroscope, ultra-low power — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bmi270-ds000.pdf&ref=openhardware.directory&product=m5stack-atoms3r&source=md-export)
- **BMM150** (magnetometer): Bosch 3-axis digital magnetometer for compass and orientation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bmm150-ds001.pdf&ref=openhardware.directory&product=m5stack-atoms3r&source=md-export)
- **GC9107** (display-driver): 128x128 IPS LCD driver, SPI interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.hackaday.io%2Ffiles%2F1881838051221472%2FGC9107%2520DataSheet%2520V1.2.pdf&ref=openhardware.directory&product=m5stack-atoms3r&source=md-export)
- **LP5562** (led-driver): TI 4-channel I2C LED driver with programmable patterns — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Flp5562.pdf&ref=openhardware.directory&product=m5stack-atoms3r&source=md-export)

## Protocols

- **I2C**: SDA=GPIO45, SCL=GPIO0
- **SPI**: SCK=GPIO15, MOSI=GPIO21, CS=GPIO14

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | Grove Port | — | digital-input, digital-output, adc, touch, pwm |
| GPIO2 | Grove Port | — | digital-input, digital-output, adc, touch, pwm |
| GPIO5 | General GPIO | — | digital-input, digital-output, adc, touch, pwm |
| GPIO6 | General GPIO | — | digital-input, digital-output, adc, touch, pwm |
| GPIO7 | General GPIO | — | digital-input, digital-output, adc, pwm |
| GPIO8 | General GPIO | — | digital-input, digital-output, adc, pwm |
| GPIO38 | Button | — | digital-input |
| GPIO47 | IR Transmitter | — | digital-output, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fatoms3r-dev-kit&ref=openhardware.directory&product=m5stack-atoms3r&source=md-export) — $17.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fatoms3r-dev-kit&ref=openhardware.directory&product=m5stack-atoms3r&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5AtomS3&ref=openhardware.directory&product=m5stack-atoms3r&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FAtomS3R&ref=openhardware.directory&product=m5stack-atoms3r&source=md-export)

## Tags

`esp32-s3`, `m5stack`, `compact`, `imu`, `magnetometer`, `psram`, `grove`, `ir`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-atoms3r)

---

# LILYGO T-Beam

> ESP32 development board combining LoRa radio (SX1276/SX1278), u-blox NEO-6M GPS, 0.96" OLED display, and 18650 battery support — the go-to board for Meshtastic and LoRa tracking projects.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$30.77
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro-USB
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- meshtastic
- meshcore
- esphome
- platformio
- paxcounter

## Components

- **ESP32-D0WDQ6** (mcu): Espressif ESP32-D0WDQ6 dual-core Xtensa LX6 at 240MHz with WiFi 802.11 b/g/n and Bluetooth 4.2/BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-beam&source=md-export)
- **SX1276** (radio): Semtech SX1276 LoRa transceiver for 868/915/923 MHz bands (SX1278 for 433 MHz), enabling long-range packet radio up to 15 km. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1276-7-8-9_W_APP_V7.pdf&ref=openhardware.directory&product=lilygo-t-beam&source=md-export)
- **NEO-6M** (gps): u-blox NEO-6M 50-channel GPS module with -161 dBm tracking sensitivity and UART interface with RTC crystal support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcontent.u-blox.com%2Fsites%2Fdefault%2Ffiles%2Fproducts%2Fdocuments%2FNEO-6_DataSheet_%2528GPS.G6-HW-09005%2529.pdf&ref=openhardware.directory&product=lilygo-t-beam&source=md-export)
- **SSD1306** (display-driver): Solomon Systech SSD1306 128×64 OLED driver connected via I2C for status display. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t-beam&source=md-export)
- **CH9102** (usb-uart): WCH CH9102 USB-to-UART converter for programming and serial debug. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fdownloads%2FCH9102DS1_PDF.html&ref=openhardware.directory&product=lilygo-t-beam&source=md-export)

## Protocols

- **SPI**: MOSI=GPIO27, MISO=GPIO19, CLK=GPIO5, NSS=GPIO18
- **I2C**: SDA=GPIO21, SCL=GPIO22
- **UART**: TX=GPIO1, RX=GPIO3

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot / Free GPIO | — | digital-input, strapping |
| GPIO2 | Free GPIO | — | digital-input, digital-output, adc, pwm |
| GPIO4 | LoRa DIO1 | — | digital-input |
| GPIO5 | LoRa NSS (SPI CS) | — | digital-output |
| GPIO13 | Free GPIO | — | digital-input, digital-output, adc, pwm |
| GPIO14 | Free GPIO | — | digital-input, digital-output, adc, pwm |
| GPIO15 | Free GPIO | — | digital-input, digital-output, adc, pwm |
| GPIO17 | GPS TX (UART) | — | digital-output |
| GPIO18 | LoRa RESET | — | digital-output |
| GPIO19 | LoRa MISO (SPI) | — | digital-input |
| GPIO21 | I2C SDA (OLED) | — | digital-input, digital-output |
| GPIO22 | I2C SCL (OLED) | — | digital-output |
| GPIO25 | Free GPIO / DAC1 | — | digital-input, digital-output, dac, pwm |
| GPIO26 | Free GPIO / DAC2 | — | digital-input, digital-output, dac, pwm |
| GPIO27 | LoRa MOSI (SPI) | — | digital-output |
| GPIO34 | Free ADC Input | — | digital-input, adc, input-only |
| GPIO35 | Free ADC Input | — | digital-input, adc, input-only |
| GPIO36 | Free ADC Input | — | digital-input, adc, input-only |
| GPIO38 | Button IO38 | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-beam&ref=openhardware.directory&product=lilygo-t-beam&source=md-export) — $30.77

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-beam&ref=openhardware.directory&product=lilygo-t-beam&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-LoRa-Series&ref=openhardware.directory&product=lilygo-t-beam&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-beam&source=md-export)

## Tags

`esp32`, `lora`, `gps`, `oled`, `meshtastic`, `lilygo`, `ttgo`, `iot`, `18650`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-beam)

---

# UkieLab WiFi Weather Station 7.5"

> A smart WiFi-enabled weather station with a 7.5\" e-ink display showing current conditions, humidity, pressure, and 4-day forecasts via Apple Weather. Available in USB-powered or battery-powered versions with optional CO2 sensor.

## Quick Facts

- **Brand:** UkieLab
- **Board Type:** consumer
- **Price:** ~$119
- **CPU:** ESP32 (exact variant not disclosed by manufacturer)
- **RAM:** 520KB SRAM
- **Flash:** 4MB (estimated)
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n

## Components

- **ESP32** (mcu): ESP32 microcontroller providing WiFi connectivity and ultra-low-power deep sleep for battery operation. Exact variant not disclosed by UkieLab. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=ukielab-wifi-weather-station-75&source=md-export)
- **7.5" E-Paper Display** (e-paper-display): Large 7.5-inch electronic paper display with 800x480 resolution. Retains image without power consumption, ideal for battery-operated weather displays. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2F7.5inch-e-paper-hat.htm&ref=openhardware.directory&product=ukielab-wifi-weather-station-75&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fukielab%2Fwifi-weather-station-75-with-apple-weather%2F&ref=openhardware.directory&product=ukielab-wifi-weather-station-75&source=md-export) — $119.00
- [UkieLab](https://openhardware.directory/r?to=https%3A%2F%2Fukielab.com%2Fproduct%2Fwifi-weather-station-7-5-battery%2F&ref=openhardware.directory&product=ukielab-wifi-weather-station-75&source=md-export) — $119.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fukielab.com%2Fproduct%2Fwifi-weather-station-7-5-battery%2F&ref=openhardware.directory&product=ukielab-wifi-weather-station-75&source=md-export)

## Tags

`weather-station`, `e-paper`, `e-ink`, `wifi`, `apple-weather`, `esp32`, `battery-powered`, `co2-sensor`

---
[View full device page](https://openhardware.directory/s/1370/ukielab-wifi-weather-station-75)

---

# CircuitMess NASA Artemis Watch 2.0

> NASA-themed programmable smartwatch powered by ESP32-S3 with BLE 5.0, 6-axis IMU, ST7735S display, and activity tracking. Pre-assembled and ready to code.

## Quick Facts

- **Brand:** circuitmess
- **Board Type:** smartwatch
- **Price:** ~$184
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** LiPo battery

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- circuitblocks
- esp-idf

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core Xtensa LX7 microcontroller at 240MHz with WiFi 802.11 b/g/n, BLE 5.0, 512KB SRAM, PSRAM, and 4MB flash. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=circuitmess-nasa-artemis-watch-2-0&source=md-export)
- **ST7735S** (display-driver): Sitronix ST7735S TFT LCD controller driving a 128×128 pixel color display over SPI at 40MHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7735.pdf&ref=openhardware.directory&product=circuitmess-nasa-artemis-watch-2-0&source=md-export)
- **LSM6DS3TR-C** (imu): STMicroelectronics LSM6DS3TR-C 6-axis IMU providing accelerometer and gyroscope data over I2C. Features wrist tilt detection, tap recognition, and significant motion detection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flsm6ds3tr-c.pdf&ref=openhardware.directory&product=circuitmess-nasa-artemis-watch-2-0&source=md-export)

## Protocols

- **SPI** (SPI2): SCK=GPIO36/41, MOSI=GPIO35/40, DC=GPIO48/39, RST=GPIO34/38
- **I2C**: SDA=GPIO40/35, SCL=GPIO41/36

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2/1 | Button DOWN | — | digital-input |
| GPIO1/9 | Button UP | — | digital-input |
| GPIO3/8 | Button SELECT | — | digital-input |
| GPIO21 | Button ALT | — | digital-input |
| GPIO33/14 | RGB LED Red | — | digital-output, pwm |
| GPIO34/12 | RGB LED Green | — | digital-output, pwm |
| GPIO48/13 | RGB LED Blue | — | digital-output, pwm |
| GPIO33/37 | Backlight | — | digital-output, pwm |
| GPIO11/47 | Buzzer | — | digital-output, pwm |
| GPIO6/5 | Battery ADC | — | adc |
| GPIO4/38 | IMU INT1 | — | digital-input |
| GPIO5/39 | IMU INT2 | — | digital-input |
| GPIO46 | LED 1 | — | digital-output |
| GPIO45 | LED 2 | — | digital-output |
| GPIO44 | LED 3 | — | digital-output |
| GPIO43 | LED 4 | — | digital-output |
| GPIO18 | LED 5 | — | digital-output |
| GPIO17 | LED 6 | — | digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [CircuitMess](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitmess.com%2Fproducts%2Fnasa-artemis-watch-2-0&ref=openhardware.directory&product=circuitmess-nasa-artemis-watch-2-0&source=md-export) — €169.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitmess.com%2Fproducts%2Fnasa-artemis-watch-2-0&ref=openhardware.directory&product=circuitmess-nasa-artemis-watch-2-0&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FCircuitMess%2FGC_Artemis-Firmware&ref=openhardware.directory&product=circuitmess-nasa-artemis-watch-2-0&source=md-export)

## Tags

`circuitmess`, `smartwatch`, `esp32-s3`, `nasa`, `wearable`, `stem`

---
[View full device page](https://openhardware.directory/s/1370/circuitmess-nasa-artemis-watch-2-0)

---

# DFRobot FireBeetle 2 ESP32-P4 AI Development Kit

> ESP32-P4 dual-core RISC-V AI development kit with hardware H.264 encoding at 1080p@30fps, MIPI CSI/DSI camera and display interfaces, ESP32-C6 WiFi 6 coprocessor, 32MB PSRAM, 16MB flash, PDM microphone, and IO expansion board.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** dev-board
- **Price:** ~$13.9
- **CPU:** ESP32-P4 RISC-V dual-core @ 360MHz + LP core @ 40MHz, FPU, H.264 HW encoder, ISP
- **RAM:** 768KB L2 Cache
- **Flash:** 16MB
- **USB:** USB-C (dual: USB 2.0 OTG + USB CDC)
- **Power:** 5V
- **Dimensions:** 25.4 x 60mm

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.0

## Components

- **ESP32-P4** (mcu): Espressif ESP32-P4 with dual-core RISC-V at 360MHz, single-precision FPU, hardware H.264 encoding at 1080p@30fps, ISP, PPA, and 768KB L2 cache. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-p4-kit&source=md-export)
- **ESP32-C6** (mcu): Companion ESP32-C6 handling WiFi 6 (802.11ax) and Bluetooth 5 LE connectivity, offloading wireless from the main P4 processor. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-p4-kit&source=md-export)
- **PDM Microphone** (microphone): Built-in PDM microphone for audio capture, voice recognition, and speech processing applications. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FFireBeetle_2_ESP32_P4_Development_Board_IO_Expansion_Kit&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-p4-kit&source=md-export)

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2950.html&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-p4-kit&source=md-export) — $13.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2950.html&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-p4-kit&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FFireBeetle_2_ESP32_P4_Development_Board_IO_Expansion_Kit&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-p4-kit&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-p4-kit&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-firebeetle-2-esp32-p4-kit)

---

# Adafruit ESP32-S3 Feather (8MB Flash, No PSRAM)

> Feather-format ESP32-S3 dual-core 240 MHz board with 8 MB flash, native USB-C, BLE, WiFi, STEMMA QT, LiPoly charging, and MAX17048 — no PSRAM variant for leaner memory budgets.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$17.5
- **CPU:** Xtensa LX7 dual-core @ 240 MHz (ESP32-S3)
- **RAM:** 512 KB SRAM
- **Flash:** 8MB
- **Power:** 5V + LiPo

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- circuitpython
- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core 240 MHz Xtensa LX7 with 512 KB SRAM, native USB OTG, 2.4 GHz WiFi, and BLE 5. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-esp32-s3-feather-8mb&source=md-export)
- **MAX17048** (battery-charger): Maxim MAX17048 Li-Ion/LiPo fuel gauge providing accurate state-of-charge via I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX17048-MAX17049.pdf&ref=openhardware.directory&product=adafruit-esp32-s3-feather-8mb&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: SCK=GPIO36, MOSI=GPIO35, MISO=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO17 | A0 | — | ADC |
| GPIO18 | A1 | — | ADC |
| GPIO14 | A2 | — | ADC |
| GPIO15 | A3 | — | ADC |
| GPIO16 | A4 | — | ADC |
| GPIO8 | A5 | — | ADC, touch |
| GPIO5 | D5 | — | GPIO, PWM |
| GPIO6 | D6 | — | GPIO, PWM |
| GPIO9 | D9 | — | GPIO, PWM |
| GPIO10 | D10 | — | GPIO, PWM |
| GPIO11 | D11 | — | GPIO, PWM |
| GPIO12 | D12 | — | GPIO, PWM |
| GPIO13 | D13 | — | GPIO, PWM |
| GPIO36 | SCK | — | SPI |
| GPIO35 | MOSI | — | SPI |
| GPIO37 | MISO | — | SPI |
| GPIO3 | SDA (STEMMA QT) | — | I2C, STEMMA QT |
| GPIO4 | SCL (STEMMA QT) | — | I2C, STEMMA QT |
| GPIO43 | TX | — | UART |
| GPIO44 | RX | — | UART |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5323&ref=openhardware.directory&product=adafruit-esp32-s3-feather-8mb&source=md-export) — 17.5

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_feather_esp32s3_nopsram%2F&ref=openhardware.directory&product=adafruit-esp32-s3-feather-8mb&source=md-export)
- [Arduino ESP32](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Farduino-esp32&ref=openhardware.directory&product=adafruit-esp32-s3-feather-8mb&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5323&ref=openhardware.directory&product=adafruit-esp32-s3-feather-8mb&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-ESP32-S3-Feather-PCB&ref=openhardware.directory&product=adafruit-esp32-s3-feather-8mb&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-esp32-s3-feather&ref=openhardware.directory&product=adafruit-esp32-s3-feather-8mb&source=md-export)

## Tags

`esp32-s3`, `feather`, `stemma-qt`, `circuitpython`, `native-usb`, `wifi`, `ble`, `lipo`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-esp32-s3-feather-8mb)

---

# Adafruit Metro ESP32-S3

> Arduino UNO-compatible Metro board with ESP32-S3 dual-core 240 MHz, 16 MB flash, 8 MB Octal PSRAM, WiFi, BLE 5, native USB-C, STEMMA QT, LiPoly charging, and JTAG debug header.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$24.95
- **CPU:** Xtensa LX7 dual-core @ 240 MHz (ESP32-S3)
- **RAM:** 512 KB SRAM + 8 MB PSRAM
- **Flash:** 16MB
- **Power:** 5V + LiPo

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- circuitpython
- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core 240 MHz Xtensa LX7 with 512 KB SRAM, 8 MB Octal PSRAM, native USB OTG, WiFi, and BLE 5. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-metro-esp32-s3&source=md-export)
- **MAX17048** (battery-charger): Maxim MAX17048 Li-Ion/LiPo fuel gauge providing state-of-charge via I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX17048-MAX17049.pdf&ref=openhardware.directory&product=adafruit-metro-esp32-s3&source=md-export)

## Protocols

- **I2C**: SDA=GPIO33, SCL=GPIO34
- **I2C (STEMMA QT)**: SDA=GPIO33, SCL=GPIO34
- **SPI**: MOSI=GPIO35, MISO=GPIO37, SCK=GPIO36
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**
- **JTAG**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | D0/RX | — | UART, GPIO |
| GPIO2 | D1/TX | — | UART, GPIO |
| GPIO3 | D2 | — | GPIO |
| GPIO4 | D3 | — | GPIO, PWM |
| GPIO5 | D4 | — | GPIO |
| GPIO6 | D5 | — | GPIO, PWM |
| GPIO7 | D6 | — | GPIO, PWM |
| GPIO8 | D7 | — | GPIO |
| GPIO9 | D8 | — | GPIO |
| GPIO10 | D9 | — | GPIO, PWM |
| GPIO11 | D10 | — | GPIO, PWM |
| GPIO12 | D11 | — | GPIO, PWM |
| GPIO13 | D12 | — | GPIO |
| GPIO14 | D13 | — | GPIO |
| GPIO17 | A0 | — | ADC |
| GPIO18 | A1 | — | ADC |
| GPIO15 | A2 | — | ADC |
| GPIO16 | A3 | — | ADC |
| GPIO19 | A4 | — | ADC |
| GPIO20 | A5 | — | ADC |
| GPIO33 | SDA (STEMMA QT) | — | I2C, STEMMA QT |
| GPIO34 | SCL (STEMMA QT) | — | I2C, STEMMA QT |
| GPIO35 | MOSI | — | SPI |
| GPIO37 | MISO | — | SPI |
| GPIO36 | SCK | — | SPI |
| GPIO43 | TX | — | UART |
| GPIO44 | RX | — | UART |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5500&ref=openhardware.directory&product=adafruit-metro-esp32-s3&source=md-export) — 24.95

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_metro_esp32s3%2F&ref=openhardware.directory&product=adafruit-metro-esp32-s3&source=md-export)
- [Arduino ESP32](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Farduino-esp32&ref=openhardware.directory&product=adafruit-metro-esp32-s3&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5500&ref=openhardware.directory&product=adafruit-metro-esp32-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Metro-ESP32-S3-PCB&ref=openhardware.directory&product=adafruit-metro-esp32-s3&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-metro-esp32-s3&ref=openhardware.directory&product=adafruit-metro-esp32-s3&source=md-export)

## Tags

`esp32-s3`, `metro`, `arduino-shield`, `stemma-qt`, `circuitpython`, `wifi`, `ble`, `psram`, `lipo`, `jtag`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-metro-esp32-s3)

---

# Adafruit PyBadge

> Credit card-sized gaming and badge board with ATSAMD51J19 at 120MHz, 1.8\" 160x128 TFT, 8 game buttons, 5 NeoPixels, LIS3DH accelerometer, light sensor, 2W speaker, 2MB SPI flash, Feather headers, STEMMA connectors, and LiPo charging.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$34.95
- **CPU:** Microchip ATSAMD51J19 ARM Cortex M4F
- **RAM:** 192 KB
- **Flash:** 512 KB
- **Power:** 5V via Micro USB or LiPo battery via JST connector
- **Dimensions:** 85.7mm × 54.6mm × 10mm

## Compatible Firmware

- circuitpython
- arduino

## Components

- **ATSAMD51J19** (mcu): 32-bit ARM Cortex M4F at 120 MHz with 512 KB flash, 192 KB SRAM, AES-256, TRNG, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D5xE5x_Family_Data_Sheet_DS60001507G.pdf&ref=openhardware.directory&product=adafruit-pybadge&source=md-export)
- **ST7735R** (display-driver): 160×128 color TFT LCD controller for game graphics and badge content. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.crystalfontz.com%2Fcontrollers%2FSitronix%2FST7735R%2F&ref=openhardware.directory&product=adafruit-pybadge&source=md-export)
- **LIS3DH** (imu): 3-axis digital accelerometer for motion sensing, shake detection, and step counting. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flis3dh.pdf&ref=openhardware.directory&product=adafruit-pybadge&source=md-export)

## Protocols

- **I2C**: SDA=D26, SCL=D27
- **SPI**: MOSI=D11, MISO=D12, SCK=D13
- **UART**: TX=D0, RX=D1
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX — UART | — | digital-input, digital-output |
| D1 | TX — UART | — | digital-input, digital-output |
| D5 | D5 — GPIO/PWM | — | digital-input, digital-output, pwm |
| D6 | D6 — GPIO/PWM | — | digital-input, digital-output, pwm |
| D9 | D9 — GPIO/PWM | — | digital-input, digital-output, pwm |
| D10 | D10 — GPIO/PWM | — | digital-input, digital-output, pwm |
| D11 | D11 — MOSI | — | digital-input, digital-output |
| D12 | D12 — MISO | — | digital-input, digital-output |
| D13 | D13 — SCK | — | digital-input, digital-output |
| D26 | SDA — I2C | — | digital-input, digital-output |
| D27 | SCL — I2C | — | digital-input, digital-output |
| A0 | A0 — ADC/DAC | — | analog-input, dac, digital-input, digital-output, pwm |
| A1 | A1 — ADC | — | analog-input, digital-input, digital-output, pwm |
| A2 | A2 — ADC | — | analog-input, digital-input, digital-output, pwm |
| A3 | A3 — ADC | — | analog-input, digital-input, digital-output, pwm |
| A4 | A4 — ADC | — | analog-input, digital-input, digital-output, pwm |
| A5 | A5 — ADC | — | analog-input, digital-input, digital-output, pwm |
| A6 | A6 — ADC | — | analog-input |
| A7 | A7 — Light Sensor/ADC | — | analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4200&ref=openhardware.directory&product=adafruit-pybadge&source=md-export) — 34.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4200&ref=openhardware.directory&product=adafruit-pybadge&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4200&ref=openhardware.directory&product=adafruit-pybadge&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-pybadge&ref=openhardware.directory&product=adafruit-pybadge&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_Arcada&ref=openhardware.directory&product=adafruit-pybadge&source=md-export)

## Tags

`gaming`, `badge`, `makecode-arcade`, `circuitpython`, `arduino`, `atsamd51`, `tft-display`, `accelerometer`, `neopixel`, `feather-compatible`, `portable`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-pybadge)

---

# Heltec WiFi Kit 32 (V3)

> ESP32-S3-based IoT development board with built-in 0.96" OLED display, lithium battery management, WiFi and Bluetooth 5.0 connectivity, and USB-C interface in a compact 50mm form factor.

## Quick Facts

- **Brand:** Heltec Automation
- **Board Type:** dev-board
- **Price:** ~$12.99
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, hardware crypto (AES/SHA)
- **RAM:** 512KB SRAM
- **Flash:** 8MB (SiP)
- **USB:** USB-C (via CP2102)
- **Power:** 5V via USB-C,3.7V LiPo battery
- **Dimensions:** 50.2 × 25.5 × 10.2mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 5.0, BLE, Mesh

## Components

- **ESP32-S3FN8** (mcu): Xtensa LX7 dual-core processor at 240MHz with 8MB SiP flash, 512KB SRAM, WiFi 802.11 b/g/n, Bluetooth 5.0, hardware crypto acceleration, and 34 programmable GPIOs. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-wifi-kit-32-v3&source=md-export)
- **SSD1306** (display-driver): Integrated OLED display controller driving a 0.96-inch 128×64 pixel monochrome display via I2C, used for showing sensor data, status info, and debug output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=heltec-wifi-kit-32-v3&source=md-export)
- **CP2102** (usb-uart): Silicon Labs USB 2.0 to UART bridge providing serial programming and debugging interface with baud rates up to 1Mbps. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=heltec-wifi-kit-32-v3&source=md-export)
- **TP4054** (battery-charger): Standalone constant-current/constant-voltage linear charger for single-cell lithium-ion batteries with programmable charge current up to 800mA and thermal regulation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fmedia.digikey.com%2Fpdf%2FData%2520Sheets%2FUTD%2520Semi%2520PDFs%2FTP4054.pdf&ref=openhardware.directory&product=heltec-wifi-kit-32-v3&source=md-export)
- **CE6260B33M** (voltage-regulator): Low-dropout linear voltage regulator providing stable 3.3V output from USB 5V or battery input to power the ESP32-S3 and peripheral ICs. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F1811081611_Shenzhen-Fuman-Elec-CE6260B33M_C193408.pdf&ref=openhardware.directory&product=heltec-wifi-kit-32-v3&source=md-export)

## Protocols

- **I2C** (I2C0): SDA=GPIO21, SCL=GPIO22
- **I2C** (I2C (OLED)): SDA=GPIO21, SCL=GPIO18
- **SPI** (SPI2): SCK=GPIO10, MOSI=GPIO11, MISO=GPIO12, SS=GPIO9
- **UART** (UART0): TX=GPIO43, RX=GPIO44
- **PWM**
- **ADC**
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | KEY_BUILTIN — User Button | — | digital-input, strapping |
| GPIO1 | A0 — Analog Input | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO2 | A1 — Analog Input | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO3 | A2 — Analog Input | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO4 | A3 — Analog Input | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO5 | A4 — Analog Input | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO6 | A5 — Analog Input | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO7 | A6 — Analog Input | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO8 | A7 — ADC2 Input | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO9 | SPI SS / A8 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO10 | SPI SCK / A9 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO11 | SPI MOSI / A10 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO12 | SPI MISO / A11 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO13 | A12 — General Purpose | — | digital-input, digital-output, adc, touch, pwm |
| GPIO14 | A13 — General Purpose | — | digital-input, digital-output, adc, touch, pwm |
| GPIO15 | A14 — General Purpose | — | digital-input, digital-output, pwm |
| GPIO16 | A15 — General Purpose | — | digital-input, digital-output, pwm |
| GPIO17 | A16 — General Purpose | — | digital-input, digital-output, pwm |
| GPIO18 | OLED SCL — I2C Clock | — | digital-input, digital-output, adc, pwm |
| GPIO19 | A18 — General Purpose | — | digital-input, digital-output, adc, pwm |
| GPIO20 | A19 — General Purpose | — | digital-input, digital-output, adc, pwm |
| GPIO21 | OLED SDA / RST — I2C Data | — | digital-input, digital-output, pwm |
| GPIO22 | I2C SCL — General I2C Clock | — | digital-input, digital-output, pwm |
| GPIO35 | LED_BUILTIN — Onboard LED | — | digital-output |
| GPIO36 | Vext — External Power Control | — | digital-output |
| GPIO43 | UART TX | — | digital-input, digital-output, pwm |
| GPIO44 | UART RX | — | digital-input, digital-output, pwm |

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Heltec Official](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwifi-kit32-v3%2F&ref=openhardware.directory&product=heltec-wifi-kit-32-v3&source=md-export) — 12.99
- [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2F1005005443005152.html&ref=openhardware.directory&product=heltec-wifi-kit-32-v3&source=md-export) — 32.80

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwifi-kit32-v3%2F&ref=openhardware.directory&product=heltec-wifi-kit-32-v3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltec_ESP32&ref=openhardware.directory&product=heltec-wifi-kit-32-v3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fesp32-series%2Flora-32%2Fwifi-kit-32%2F&ref=openhardware.directory&product=heltec-wifi-kit-32-v3&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWiFi_Kit_32_V3%2FHTIT-WiFi%2520kit32_V3%2528Rev1.1%2529.pdf&ref=openhardware.directory&product=heltec-wifi-kit-32-v3&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWiFi_Kit_32_V3%2FHTIT-WB32_V3_Schematic_Diagram.pdf&ref=openhardware.directory&product=heltec-wifi-kit-32-v3&source=md-export)

## Tags

`esp32-s3`, `oled`, `wifi`, `bluetooth`, `battery`, `iot`, `heltec`, `dev-board`

---
[View full device page](https://openhardware.directory/s/1370/heltec-wifi-kit-32-v3)

---

# LILYGO T-Display S3 AMOLED

> ESP32-S3 board with 1.91-inch RM67162 AMOLED display (240×536), optional touch, 16MB flash, 8MB PSRAM, and USB-C — delivering vivid OLED visuals for IoT dashboards and smart displays.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$26.44
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C 2.0
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- esphome
- platformio

## Components

- **ESP32-S3R8** (mcu): Espressif ESP32-S3R8 dual-core Xtensa LX7 at 240MHz with 8MB integrated PSRAM, WiFi, BLE 5.0, USB OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-display-s3-amoled&source=md-export)
- **RM67162** (display-driver): Raydium RM67162 AMOLED display controller for the 1.91-inch 240×536 panel via QSPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raydium.com.tw%2Fen-US%2FproductDetail%2F55&ref=openhardware.directory&product=lilygo-t-display-s3-amoled&source=md-export)
- **CST816S** (touch-controller): Hynitron CST816S single-point touch controller with gesture recognition on touch variants. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Flupyuen%2Fhynitron_i2c_cst0xxse%2Fblob%2Fmaster%2FCST816S_Datasheet_EN.pdf&ref=openhardware.directory&product=lilygo-t-display-s3-amoled&source=md-export)

## Protocols

- **SPI**: MOSI=GPIO11, CLK=GPIO12, CS=GPIO10, DC=GPIO13
- **I2C**: SDA=GPIO3, SCL=GPIO2
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot Button | — | digital-input, strapping |
| GPIO2 | I2C SCL (Touch) | — | digital-input, digital-output, touch |
| GPIO3 | I2C SDA (Touch) | — | digital-input, digital-output, touch |
| GPIO4 | Battery ADC | — | digital-input, adc |
| GPIO10 | Display CS | — | digital-output |
| GPIO11 | Display MOSI | — | digital-output |
| GPIO12 | Display CLK | — | digital-output |
| GPIO13 | Display DC | — | digital-output |
| GPIO21 | Free GPIO | — | digital-input, digital-output |
| GPIO38 | Free GPIO | — | digital-input, digital-output |
| GPIO39 | Free GPIO | — | digital-input, digital-output |
| GPIO40 | Free GPIO | — | digital-input, digital-output |
| GPIO41 | Free GPIO | — | digital-input, digital-output |
| GPIO42 | Free GPIO | — | digital-input, digital-output |
| GPIO43 | UART TX | — | digital-output |
| GPIO44 | UART RX | — | digital-input |
| GPIO45 | Free GPIO | — | digital-input, digital-output, strapping |
| GPIO46 | Free GPIO | — | digital-input, digital-output, strapping |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-s3-amoled&ref=openhardware.directory&product=lilygo-t-display-s3-amoled&source=md-export) — $26.44

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-s3-amoled&ref=openhardware.directory&product=lilygo-t-display-s3-amoled&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-AMOLED-Series&ref=openhardware.directory&product=lilygo-t-display-s3-amoled&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-display-s3-amoled&source=md-export)

## Tags

`esp32-s3`, `amoled`, `display`, `lilygo`, `touch`, `wifi`, `ble5`, `iot`, `dashboard`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-display-s3-amoled)

---

# LILYGO FabGL VGA32

> ESP32 development board with VGA video output, dual PS/2 ports for keyboard and mouse, 4MB flash, and the FabGL graphics library — a retro computing platform for VGA terminal emulators and classic games.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$11.2
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro-USB
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino

## Components

- **ESP32** (mcu): Dual-core 240MHz Xtensa LX6 with WiFi, Bluetooth 4.2, and analog VGA signal generation via resistor DAC — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-fabgl-vga32&source=md-export)
- **VGA Output** (display-interface): Analog VGA output via resistor ladder DAC for connecting standard VGA monitors — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-fabgl-vga32&source=md-export)
- **PS/2 Keyboard Port** (input): PS/2 port for connecting classic keyboards supported by the FabGL library — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-fabgl-vga32&source=md-export)
- **PS/2 Mouse Port** (input): PS/2 port for connecting classic mice supported by the FabGL library — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-fabgl-vga32&source=md-export)
- **CH9102** (usb-serial): USB to serial converter for programming — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH9102.html&ref=openhardware.directory&product=lilygo-fabgl-vga32&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ffabgl-vga32&ref=openhardware.directory&product=lilygo-fabgl-vga32&source=md-export) — $11.20

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ffabgl-vga32&ref=openhardware.directory&product=lilygo-fabgl-vga32&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ffdivitto%2FFabGL&ref=openhardware.directory&product=lilygo-fabgl-vga32&source=md-export)

## Tags

`esp32`, `vga`, `retro-computing`, `ps2`, `fabgl`, `terminal`, `game-engine`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-fabgl-vga32)

---

# LILYGO T-TWR Rev2.1

> LILYGO T-TWR Rev2.1 is an ESP32-S3 based programmable walkie-talkie board featuring the SA868 UHF/VHF radio module, GPS, OLED display, and battery support for amateur radio applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$48.99
- **CPU:** ESP32-S3-WROOM-1-N16R8
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + Li-Ion 18650

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- softrf
- openrtx
- esp32aprs

## Components

- **ESP32-S3-WROOM-1-N16R8** (mcu): ESP32-S3 dual-core LX7 module with 16MB flash, 8MB PSRAM, Wi-Fi and Bluetooth 5 LE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-twr-rev2-1&source=md-export)
- **SA868** (vhf-uhf-radio): SA868 UHF/VHF radio module available in 400-480 MHz (UHF) or 134-174 MHz (VHF) variants for amateur radio and walkie-talkie applications — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nicerf.com%2Fdatasheet%2FSA868.pdf&ref=openhardware.directory&product=lilygo-t-twr-rev2-1&source=md-export)
- **L76K** (gps): Quectel L76K GNSS module supporting GPS, BDS, and GLONASS with built-in LNA, SAW filter, AGNSS, and 1PPS output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgnss-l76k&ref=openhardware.directory&product=lilygo-t-twr-rev2-1&source=md-export)
- **SH1106** (display-driver): 1.3 inch OLED display driver with 128x64 resolution connected via I2C (SDA: IO08, SCL: IO09) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FSH1106.pdf&ref=openhardware.directory&product=lilygo-t-twr-rev2-1&source=md-export)
- **AXP2102** (pmu): AXP2102 PMU for battery charging and power distribution across the board — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.x-powers.com%2Fen.php%2FInfo%2Fproduct_detail%2Farticle_id%2F95&ref=openhardware.directory&product=lilygo-t-twr-rev2-1&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **GPIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-twr-rev2-1&ref=openhardware.directory&product=lilygo-t-twr-rev2-1&source=md-export) — $48.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-twr-rev2-1&ref=openhardware.directory&product=lilygo-t-twr-rev2-1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-TWR&ref=openhardware.directory&product=lilygo-t-twr-rev2-1&source=md-export)

## Tags

`esp32-s3`, `sa868`, `walkie-talkie`, `uhf`, `vhf`, `aprs`, `amateur-radio`, `gps`, `meshtastic`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-twr-rev2-1)

---

# LILYGO T-PoE Pro

> ESP32-WROVER-E development board with LAN8720 Ethernet, IEEE 802.3 af/at Power over Ethernet (5V@4A, 44–57V input), 16MB flash, 8MB PSRAM, WiFi, BLE 4.2, and expandable LCD interface for wired IoT gateway applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$33.05
- **CPU:** ESP32-WROVER-E
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **USB:** Micro-USB
- **Power:** PoE

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2 | Ethernet 10/100 Mbps PoE

## Compatible Firmware

- arduino
- esp-idf
- esphome

## Components

- **ESP32-WROVER-E** (mcu): ESP32-WROVER-E with 16MB flash, 8MB PSRAM, 240MHz dual-core, WiFi and BLE 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-poe-pro&source=md-export)
- **LAN8720** (ethernet): Single-chip 10/100 Mbps Ethernet physical layer transceiver for wired network connectivity — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F8720a.pdf&ref=openhardware.directory&product=lilygo-t-poe-pro&source=md-export)
- **PoE Module** (power): IEEE 802.3 af/at compliant PoE module providing 5V@4A from 44-57V Ethernet power input — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F8720a.pdf&ref=openhardware.directory&product=lilygo-t-poe-pro&source=md-export)
- **CH9102** (usb-serial): USB to serial converter for programming and debugging — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH9102.html&ref=openhardware.directory&product=lilygo-t-poe-pro&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-poe-pro&ref=openhardware.directory&product=lilygo-t-poe-pro&source=md-export) — $33.05

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-poe-pro&ref=openhardware.directory&product=lilygo-t-poe-pro&source=md-export)

## Tags

`esp32`, `ethernet`, `poe`, `lan8720`, `wired-network`, `iot-gateway`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-poe-pro)

---

# ESP32 WiFi Fancontroller

> ESP32-S2-based WiFi fan controller with 4 independent PWM outputs, integrated HDC1080 temperature and humidity sensor, Qwiic expansion, and native Home Assistant integration via ESPHome.

## Quick Facts

- **Brand:** zeroflow
- **Board Type:** Fan Controller
- **Price:** ~$54.99
- **CPU:** ESP32-S2
- **RAM:** 320KB
- **Flash:** 4MB
- **GPIO:** 4 PWM + expansion pads pins
- **USB:** USB-C
- **Power:** 12V DC

## Connectivity

WiFi 802.11 b/g/n

## Compatible Firmware

- esphome

## Components

- **ESP32-S2** (mcu): Espressif single-core 32-bit Xtensa LX7 WiFi SoC running at 240 MHz with 320 KB SRAM, 43 GPIOs, and native USB support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=esp32-wifi-fancontroller&source=md-export)
- **HDC1080** (sensor): Texas Instruments 14-bit digital humidity and temperature sensor with +/-0.2C and +/-2% RH accuracy, I2C interface, and 100 nA sleep current. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fhdc1080&ref=openhardware.directory&product=esp32-wifi-fancontroller&source=md-export)
- **stemma-qt** (connector): SparkFun-standard JST SH 4-pin I2C connector for plug-and-play sensor expansion without soldering. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sparkfun.com%2Fqwiic&ref=openhardware.directory&product=esp32-wifi-fancontroller&source=md-export)

## Protocols

- **I2C**
- **PWM**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** GPL-3.0

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fzeroflow%2Fesp32-wifi-fancontroller%2F&ref=openhardware.directory&product=esp32-wifi-fancontroller&source=md-export) — $54.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fzeroflow%2Fesp32-wifi-fancontroller%2F&ref=openhardware.directory&product=esp32-wifi-fancontroller&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fzeroflow%2Fwifi-fancontroller&ref=openhardware.directory&product=esp32-wifi-fancontroller&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Ffancontroller.arthofer.dev%2F&ref=openhardware.directory&product=esp32-wifi-fancontroller&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fzeroflow%2Fwifi-fancontroller&ref=openhardware.directory&product=esp32-wifi-fancontroller&source=md-export)

## Tags

`esp32-s2`, `fan-controller`, `pwm`, `home-assistant`, `esphome`, `temperature-sensor`, `hdc1080`, `qwiic`, `open-source`, `ce-certified`, `wifi`, `ventilation`

## Certifications

CE

---
[View full device page](https://openhardware.directory/s/1370/esp32-wifi-fancontroller)

---

# ProS3 ESP32-S3 with u.FL

> Unexpected Maker's ProS3 ESP32-S3 with u.FL external antenna, 16MB flash, 8MB PSRAM, 27 GPIO castellated headers, dual LDO regulators, LiPo charging, and STEMMA QT.

## Quick Facts

- **Brand:** Unexpected Maker
- **Board Type:** dev-board
- **Price:** ~$29.95
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11b/g/n | Bluetooth 5.0 LE + Mesh

## Compatible Firmware

- circuitpython
- micropython
- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Dual-core Xtensa LX7 at 240 MHz, 512KB SRAM, Wi-Fi + BT5, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=pros3-esp32-s3-ufl&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO35, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | D1 | — | digital, adc |
| GPIO2 | D2 | — | digital, adc |
| GPIO3 | SDA | — | i2c-sda, digital |
| GPIO4 | SCL | — | i2c-scl, digital |
| GPIO5 | D5 | — | digital, pwm |
| GPIO6 | D6 | — | digital, pwm |
| GPIO7 | D7 | — | digital, pwm |
| GPIO8 | D8 | — | digital, pwm |
| GPIO9 | D9 | — | digital, pwm |
| GPIO10 | D10 | — | digital, pwm |
| GPIO11 | D11 | — | digital |
| GPIO12 | D12 | — | digital |
| GPIO13 | D13 | — | digital |
| GPIO14 | A2 | — | analog, digital |
| GPIO15 | A3 | — | analog, digital |
| GPIO16 | A4 | — | analog, digital |
| GPIO17 | A0 | — | analog, digital |
| GPIO18 | A1 | — | analog, digital |
| GPIO35 | MOSI | — | spi-mosi, digital |
| GPIO36 | MISO | — | spi-miso, digital |
| GPIO37 | SCK | — | spi-sck, digital |
| GPIO43 | TX | — | uart-tx, digital |
| GPIO44 | RX | — | uart-rx, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5749&ref=openhardware.directory&product=pros3-esp32-s3-ufl&source=md-export) — 29.95

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Funexpectedmaker_pros3%2F&ref=openhardware.directory&product=pros3-esp32-s3-ufl&source=md-export)
- [Product Page](https://openhardware.directory/r?to=https%3A%2F%2Fpros3.io%2F&ref=openhardware.directory&product=pros3-esp32-s3-ufl&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5749&ref=openhardware.directory&product=pros3-esp32-s3-ufl&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Funexpectedmaker%2Fesp32s3&ref=openhardware.directory&product=pros3-esp32-s3-ufl&source=md-export)

## Tags

`unexpected-maker`, `pros3`, `esp32-s3`, `ufl`, `external-antenna`, `castellated`, `psram`, `circuitpython`

---
[View full device page](https://openhardware.directory/s/1370/pros3-esp32-s3-ufl)

---

# LILYGO T3 LoRa32 V1.6.1

> ESP32-PICO-D4 development board with LoRa SX1276/SX1278 radio, 0.96\" SSD1306 OLED, microSD slot, WiFi, Bluetooth 4.2, and LiPo battery support in a compact 66×36mm form factor.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$15.6
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro-USB
- **Power:** 5V + LiPo
- **Dimensions:** 66 × 36 × 15mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- platformio
- micropython
- meshtastic
- esphome
- paxcounter

## Components

- **ESP32-PICO-D4** (mcu): Espressif ESP32-PICO-D4 System-in-Package with Xtensa LX6 dual-core @ 240MHz, 4MB flash, WiFi 802.11 b/g/n, Bluetooth 4.2, and hardware crypto acceleration. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-pico-d4_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export)
- **SX1276** (radio): Semtech SX1276 LoRa transceiver with -148dBm sensitivity, +14dBm output power, FSK/GFSK/MSK/GMSK/LoRa/OOK modulation, 137–1020MHz range. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1276&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export)
- **SSD1306** (display-driver): Solomon Systech SSD1306 OLED driver with 128×64 resolution, I2C interface at 0x3C, and 256-step brightness control. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export)
- **CH9102** (usb-uart): WCH CH9102 USB-to-UART converter supporting up to 4Mbps baud rate with hardware full-duplex UART and built-in crystal oscillator. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fdownloads%2FCH9102DS1_PDF.html&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export)

## Protocols

- **SPI** (VSPI (LoRa)): CLK=GPIO5, MOSI=GPIO27, MISO=GPIO19, CS=GPIO18
- **SPI** (HSPI (SD Card)): CLK=GPIO14, MOSI=GPIO15, MISO=GPIO2, CS=GPIO13
- **I2C** (I2C0 (OLED)): SDA=GPIO21, SCL=GPIO22
- **UART** (UART0 (USB)): TX=GPIO1, RX=GPIO3

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot Button | — | digital-input, digital-output, pwm, touch, adc, rtc |
| GPIO2 | SD MISO | — | digital-input, digital-output, pwm, touch, adc, rtc |
| GPIO5 | LoRa SCK | — | digital-input, digital-output, pwm |
| GPIO13 | SD CS | — | digital-input, digital-output, pwm, touch, adc, rtc |
| GPIO14 | SD SCK | — | digital-input, digital-output, pwm, touch, adc, rtc |
| GPIO15 | SD MOSI | — | digital-input, digital-output, pwm, touch, adc, rtc |
| GPIO16 | OLED RST | — | digital-input, digital-output, pwm |
| GPIO18 | LoRa CS | — | digital-input, digital-output, pwm |
| GPIO19 | LoRa MISO | — | digital-input, digital-output, pwm |
| GPIO21 | OLED SDA | — | digital-input, digital-output, pwm |
| GPIO22 | OLED SCL | — | digital-input, digital-output, pwm |
| GPIO23 | LoRa RST | — | digital-input, digital-output, pwm |
| GPIO25 | User LED | — | digital-input, digital-output, pwm, dac, rtc |
| GPIO26 | LoRa DIO0 | — | digital-input, digital-output, pwm, dac, adc, rtc |
| GPIO27 | LoRa MOSI | — | digital-input, digital-output, pwm, touch, adc, rtc |
| GPIO32 | LoRa DIO2 | — | digital-input, digital-output, pwm, touch, adc, rtc |
| GPIO33 | LoRa DIO1 | — | digital-input, digital-output, pwm, touch, adc, rtc |
| GPIO35 | Battery ADC | — | digital-input, adc, input-only, rtc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Flora3&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export) — $15.60
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FLILYGO-LoRa32-433Mhz-Development-Paxcounter%2Fdp%2FB0B45L398K&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export) — $15.60

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Flora3&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-LoRa-Series&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc%2Fget_started%2Fen%2FLoRa_GPS%2FLoRa32%2FLoRa32.html&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-LoRa-Series%2Fblob%2Fmaster%2Fschematic%2FT3_V1.6.1.pdf&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export)

## Tags

`esp32`, `lora`, `oled`, `iot`, `mesh-networking`, `paxcounter`, `meshtastic`, `disaster-radio`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t3-lora32-v1-6-1)

---

# Waveshare RoArm-M3

> ESP32-based 5+1 DOF robotic arm with 1kg payload, 360-degree base, dual-drive shoulder, 7 servos, 9-axis IMU, TF card slot, and ROS 2 + LeRobot support. Carbon fiber and aluminum build.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** robotic-arm
- **Price:** ~$239.99
- **CPU:** ESP32-WROOM-32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Type-C
- **Power:** 12V 5A DC

## Connectivity

WiFi 2.4GHz | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- ros2
- esp-idf
- micropython

## Components

- **ESP32-WROOM-32** (MCU): Espressif ESP32 dual-core Xtensa LX6 microcontroller with integrated WiFi and Bluetooth — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-roarm-m3&source=md-export)
- **ST3215 Serial Bus Servo (x7)** (Servo): Feetech ST3215 and ST3215-HS TTL serial bus servos with 30kg.cm torque at 12V, 40rpm no-load speed, and 12-bit magnetic encoder — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.feetechrc.com%2Fst3215.html&ref=openhardware.directory&product=waveshare-roarm-m3&source=md-export)
- **QMI8658C** (IMU): QST QMI8658C 6-axis inertial measurement unit with 3-axis accelerometer and 3-axis gyroscope — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.qstcorp.com%2Fupload%2Fpdf%2F202301%2F13-52-25%2520QMI8658C%2520Datasheet%2520Rev%2520A.pdf&ref=openhardware.directory&product=waveshare-roarm-m3&source=md-export)
- **AK09918C** (Sensor): AKM AK09918C 3-axis electronic compass for orientation sensing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.akm.com%2Fcontent%2Fdam%2Fdocuments%2Fproducts%2Felectronic-compass%2Fak09918c%2Fak09918c-en-datasheet.pdf&ref=openhardware.directory&product=waveshare-roarm-m3&source=md-export)
- **INA219** (Power Monitor): Texas Instruments INA219 high-side current and power monitor with I2C interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fina219.pdf&ref=openhardware.directory&product=waveshare-roarm-m3&source=md-export)
- **TB6612FNG** (Motor Driver): Toshiba TB6612FNG dual H-bridge motor driver for DC and stepper motor control — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sparkfun.com%2Fdatasheets%2FRobotics%2FTB6612FNG.pdf&ref=openhardware.directory&product=waveshare-roarm-m3&source=md-export)
- **0.91-inch OLED** (Display): 0.91-inch OLED screen for real-time status and parameter display — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRoArm-M3&ref=openhardware.directory&product=waveshare-roarm-m3&source=md-export)

## Protocols

- **UART**
- **I2C**
- **HTTP/JSON**
- **ESP-NOW**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Waveshare Official](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Froarm-m3.htm&ref=openhardware.directory&product=waveshare-roarm-m3&source=md-export) — $239.99
- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwaveshare-roarm-m3-robot-arm&ref=openhardware.directory&product=waveshare-roarm-m3&source=md-export) — $309.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Froarm-m3.htm&ref=openhardware.directory&product=waveshare-roarm-m3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRoArm-M3&ref=openhardware.directory&product=waveshare-roarm-m3&source=md-export)

## Tags

`robotic-arm`, `esp32`, `ros2`, `arduino`, `wifi`, `desktop-robot`, `servo`, `waveshare`, `imu`, `lerobot`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-roarm-m3)

---

# DFRobot Maixduino AI Development Kit

> RISC-V AI development board combining the Kendryte K210 AI processor with ESP32 for WiFi/BT connectivity. Includes camera and microphone for computer vision and voice recognition applications.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** dev-board
- **Price:** ~$52
- **CPU:** Kendryte K210
- **RAM:** 8 MB SRAM
- **Flash:** 16MB
- **GPIO:** 48 pins
- **USB:** USB-C
- **Power:** 5V
- **Dimensions:** 68.6 x 53.4mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- micropython
- maixpy
- arduino
- freertos

## Components

- **Kendryte K210** (mcu): Dual-core 64-bit RISC-V processor at 400MHz with hardware KPU (0.8 TOPS neural network accelerator) and FFT accelerator for on-device AI inference — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sipeed.com%2FK210%2FHDK%2FKendryte%2520K210%2520Datasheet.pdf&ref=openhardware.directory&product=dfrobot-maixduino&source=md-export)
- **ESP32** (mcu): Espressif ESP32 providing WiFi 802.11 b/g/n and Bluetooth 4.2 connectivity for IoT applications — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-maixduino&source=md-export)
- **OV2640** (camera): OmniVision 2-megapixel CMOS image sensor for real-time computer vision and image capture — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2FOV2640_DS.pdf&ref=openhardware.directory&product=dfrobot-maixduino&source=md-export)
- **MSM261S4030H0** (microphone): MEMSensing I2S digital MEMS microphone for voice recognition and audio capture applications — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.memsensing.com%2Fuploadfiles%2F2019%2F11%2F20191128165303481.pdf&ref=openhardware.directory&product=dfrobot-maixduino&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **I2S**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fdfrobot-maixduino-ai-kit-esp32&ref=openhardware.directory&product=dfrobot-maixduino&source=md-export) — $52

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1965.html&ref=openhardware.directory&product=dfrobot-maixduino&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsipeed%2FMaixPy&ref=openhardware.directory&product=dfrobot-maixduino&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.sipeed.com%2Fsoft%2Fmaixpy%2Fen%2F&ref=openhardware.directory&product=dfrobot-maixduino&source=md-export)

## Tags

`k210`, `risc-v`, `esp32`, `ai`, `machine-learning`, `camera`, `microphone`, `maixpy`, `sipeed`

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-maixduino)

---

# Waveshare ESP32-C6-GEEK

> Compact USB-A dongle development board with ESP32-C6 RISC-V MCU, 1.14\" IPS LCD, WiFi 6, BLE 5.0, Zigbee 3.0, Thread, and microSD slot for portable IoT projects.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$9.99
- **CPU:** ESP32-C6
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **GPIO:** 7 pins
- **USB:** USB-A
- **Power:** 5V
- **Dimensions:** 61 x 24.5 x 9mm

## Connectivity

WiFi Wi-Fi 6 | Bluetooth BLE 5.0 | Zigbee Zigbee 3.0

## Compatible Firmware

- arduino
- esp-idf
- esphome
- micropython

## Components

- **ESP32-C6** (mcu): ESP32-C6 RISC-V single-core @ 160MHz with LP core @ 20MHz, WiFi 6, BLE 5.0, 802.15.4 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocumentation.espressif.com%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-c6-geek&source=md-export)
- **ST7789** (display-driver): 1.14" IPS LCD controller, 240x135 resolution, SPI interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.newhavendisplay.com%2Fappnotes%2Fdatasheets%2FLCDs%2FST7789V.pdf&ref=openhardware.directory&product=waveshare-esp32-c6-geek&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | SPI MISO | — | — |
| GPIO1 | SPI SCK | — | — |
| GPIO2 | SPI MOSI | — | — |
| GPIO3 | I2C SDA | — | — |
| GPIO4 | I2C SCL | — | — |
| GPIO5 | UART TX | — | — |
| GPIO6 | UART RX | — | — |

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-c6-geek.htm&ref=openhardware.directory&product=waveshare-esp32-c6-geek&source=md-export) — $9.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-c6-geek.htm&ref=openhardware.directory&product=waveshare-esp32-c6-geek&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam&ref=openhardware.directory&product=waveshare-esp32-c6-geek&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.waveshare.com%2FESP32-C6-GEEK&ref=openhardware.directory&product=waveshare-esp32-c6-geek&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocumentation.espressif.com%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-c6-geek&source=md-export)

## Tags

`esp32-c6`, `risc-v`, `wifi-6`, `zigbee`, `thread`, `matter`, `usb-dongle`, `lcd-display`, `waveshare`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-esp32-c6-geek)

---

# Adafruit PyPortal Titano

> Large-screen IoT display board with ATSAMD51J20 + ESP32 WiFi coprocessor, 3.5" 320×480 resistive touchscreen TFT, 8MB Flash, microSD, speaker, and USB-C. Designed for Python-powered internet-connected dashboards.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** iot-display
- **Price:** ~$59.95
- **CPU:** ARM Cortex-M4F @ 120MHz (ATSAMD51J20)
- **RAM:** 256KB SRAM
- **Flash:** 8MB SPI Flash
- **Power:** 5V

## Connectivity

WiFi 802.11b/g/n via ESP32 coprocessor | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- circuitpython
- arduino

## Components

- **ATSAMD51J20** (mcu): Microchip ATSAMD51J20 ARM Cortex-M4F @ 120MHz, 1MB Flash, 256KB RAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D5xE5x_Family_Data_Sheet_DS60001507F.pdf&ref=openhardware.directory&product=adafruit-pyportal-titano&source=md-export)
- **ESP32** (radio): Espressif ESP32 used as a TLS/SSL-capable WiFi coprocessor for secure internet connectivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-pyportal-titano&source=md-export)

## Protocols

- **I2C**: SDA=D26, SCL=D27
- **SPI**: MOSI=D23, MISO=D22, SCK=D24
- **UART**: TX=D1, RX=D0
- **USB**
- **WiFi**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D3 | D3 — Digital/Analog breakout | — | analog-input, digital-input, digital-output, pwm |
| D4 | D4 — Digital/Analog breakout | — | analog-input, digital-input, digital-output, pwm |
| D26 | SDA — I2C (STEMMA QT) | — | digital-input, digital-output |
| D27 | SCL — I2C (STEMMA QT) | — | digital-input, digital-output |
| D23 | MOSI — SPI | — | digital-input, digital-output |
| D22 | MISO — SPI | — | digital-input, digital-output |
| D24 | SCK — SPI | — | digital-input, digital-output |
| D1 | TX — UART | — | digital-input, digital-output |
| D0 | RX — UART | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4444&ref=openhardware.directory&product=adafruit-pyportal-titano&source=md-export) — 59.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4444&ref=openhardware.directory&product=adafruit-pyportal-titano&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4444&ref=openhardware.directory&product=adafruit-pyportal-titano&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-pyportal-titano&ref=openhardware.directory&product=adafruit-pyportal-titano&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_PyPortal&ref=openhardware.directory&product=adafruit-pyportal-titano&source=md-export)

## Tags

`pyportal`, `iot-display`, `circuitpython`, `wifi`, `esp32`, `atsamd51`, `touchscreen`, `adafruit`, `stemma-qt`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-pyportal-titano)

---

# Pycom GPy

> ESP32-based triple-network MicroPython board with WiFi 802.11 b/g/n, Bluetooth LE, and LTE CAT-M1/NB1 cellular. 4MB RAM, 8MB flash, 22 GPIO, breadboard-compatible. Ideal for global LTE IoT deployments.

## Quick Facts

- **Brand:** Pycom
- **Board Type:** dev-board
- **Price:** ~$54.95
- **CPU:** Espressif ESP32 dual-core Xtensa LX6
- **RAM:** 4 MB
- **Flash:** 8 MB
- **GPIO:** 22 pins
- **Power:** 3.3V-5.5V via pin headers or Pycom expansion board
- **Dimensions:** 55mm × 20mm × 3.5mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- micropython

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 at 240 MHz with integrated 802.11 b/g/n WiFi and Bluetooth 4.2/BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=pycom-gpy&source=md-export)
- **Sequans Monarch** (wireless-module): LTE modem supporting CAT-M1 and NB1 (3GPP Release 13) across 699-2690 MHz globally. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sequans.com%2Fproducts%2Fmonarch%2F&ref=openhardware.directory&product=pycom-gpy&source=md-export)

## Protocols

- **I2C**: SDA=P9, SCL=P10
- **SPI**: MOSI=P10, MISO=P11, SCK=P12
- **UART**: TX=P1, RX=P0
- **WiFi**
- **Bluetooth**
- **LTE**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| P0 | RX | — | digital-input, digital-output |
| P1 | TX | — | digital-input, digital-output |
| P2 | GPIO | — | digital-input, digital-output |
| P3 | GPIO | — | digital-input, digital-output |
| P4 | GPIO | — | digital-input, digital-output |
| P6 | GPIO | — | digital-input, digital-output |
| P7 | GPIO | — | digital-input, digital-output |
| P8 | GPIO | — | digital-input, digital-output |
| P9 | SDA | — | digital-input, digital-output |
| P10 | SCL/MOSI | — | digital-input, digital-output |
| P11 | MISO | — | digital-input, digital-output |
| P12 | SCK | — | digital-input, digital-output |
| P13 | GPIO | — | digital-input, digital-output |
| P14 | GPIO | — | digital-input, digital-output |
| P15 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P16 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P17 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P18 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P19 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P20 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P21 | GPIO | — | digital-input, digital-output |
| P22 | GPIO | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3612&ref=openhardware.directory&product=pycom-gpy&source=md-export) — 54.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3612&ref=openhardware.directory&product=pycom-gpy&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3612&ref=openhardware.directory&product=pycom-gpy&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.pycom.io%2Fdatasheets%2Fdevelopment%2Fgpy%2F&ref=openhardware.directory&product=pycom-gpy&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fpycom%2Fpycom-micropython-sigfox&ref=openhardware.directory&product=pycom-gpy&source=md-export)

## Tags

`lte`, `cat-m1`, `nb-iot`, `esp32`, `micropython`, `wifi`, `ble`, `iot`, `pycom`, `lpwan`, `cellular`

## Certifications

FCC, CE, RoHS

---
[View full device page](https://openhardware.directory/s/1370/pycom-gpy)

---

# Adafruit QT Py ESP32-S2

> Tiny Seeed XIAO-compatible ESP32-S2 dev board with 4 MB flash, 2 MB PSRAM, native USB-C, STEMMA QT, WiFi, 13 GPIO, and 10 ADC inputs — no Bluetooth, all in a 21.8 × 17.9 mm footprint.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$12.5
- **CPU:** Xtensa LX7 single-core @ 240 MHz (ESP32-S2)
- **RAM:** 320 KB SRAM + 2 MB PSRAM
- **Flash:** 4MB
- **Power:** 5V
- **Dimensions:** 21.8 × 17.9 × 5.7 mm

## Connectivity

WiFi 2.4GHz 802.11 b/g/n

## Compatible Firmware

- circuitpython
- arduino
- esp-idf

## Components

- **ESP32-S2** (mcu): Espressif ESP32-S2 single-core 240 MHz Xtensa LX7 with native USB OTG, 2.4 GHz WiFi, 320 KB SRAM, and 10-channel ADC. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-qt-py-esp32-s2&source=md-export)

## Protocols

- **I2C**: SDA=GPIO5, SCL=GPIO6
- **I2C (STEMMA QT)**: SDA=GPIO5, SCL=GPIO6
- **SPI**: MOSI=GPIO35, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO17 | A0 | — | ADC, touch |
| GPIO18 | A1 | — | ADC, touch |
| GPIO14 | A2 | — | ADC, touch |
| GPIO15 | A3 | — | ADC, touch |
| GPIO5 | SDA (STEMMA QT) | — | I2C, STEMMA QT, touch |
| GPIO6 | SCL (STEMMA QT) | — | I2C, STEMMA QT, touch |
| GPIO35 | MOSI | — | SPI |
| GPIO36 | MISO | — | SPI |
| GPIO37 | SCK | — | SPI |
| GPIO43 | TX | — | UART |
| GPIO44 | RX | — | UART |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5325&ref=openhardware.directory&product=adafruit-qt-py-esp32-s2&source=md-export) — 12.5

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_qtpy_esp32s2%2F&ref=openhardware.directory&product=adafruit-qt-py-esp32-s2&source=md-export)
- [Arduino ESP32](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Farduino-esp32&ref=openhardware.directory&product=adafruit-qt-py-esp32-s2&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5325&ref=openhardware.directory&product=adafruit-qt-py-esp32-s2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-QT-Py-ESP32-S2-PCB&ref=openhardware.directory&product=adafruit-qt-py-esp32-s2&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-qt-py-esp32-s2&ref=openhardware.directory&product=adafruit-qt-py-esp32-s2&source=md-export)

## Tags

`esp32-s2`, `qt-py`, `stemma-qt`, `circuitpython`, `native-usb`, `wifi`, `tiny`, `xiao-compatible`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-qt-py-esp32-s2)

---

# Heltec Vision Master T190

> ESP32-S3 development board with optional SX1262 LoRa module and 1.9-inch TFT color display. Supports Meshtastic, LoRaWAN, Arduino, MicroPython, and features integrated battery management with 18uA deep sleep.

## Quick Facts

- **Brand:** Heltec Automation
- **Board Type:** dev-board
- **Price:** ~$17.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, ULP co-processor
- **RAM:** 512KB SRAM
- **Flash:** 16MB (QSPI)
- **USB:** USB-C (native USB OTG)
- **Power:** 5V via USB-C,3.3-4.2V LiPo
- **Dimensions:** 60 × 25.4 × 10.19mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- platformio
- ESP-IDF
- meshtastic

## Components

- **ESP32-S3R8** (mcu): Xtensa LX7 dual-core @ 240MHz with 512KB SRAM, 8MB OPI PSRAM, WiFi 802.11 b/g/n, BLE 5.0, USB OTG, and ULP RISC-V co-processor for deep sleep operation at 18uA. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-vision-master-t190&source=md-export)
- **SX1262** (radio): Semtech SX1262 long-range LoRa transceiver supporting 150-960MHz ISM bands with +21dBm TX power and -136dBm RX sensitivity at SF12/BW125. Supports LoRa, LoRaWAN, and FSK modulation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=heltec-vision-master-t190&source=md-export)
- **ST7789** (display-driver): Sitronix ST7789 TFT controller driving a 1.9-inch 170x320 pixel display with 262K colors via SPI interface. Supports partial display mode for power savings. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.buydisplay.com%2Fdownload%2Fic%2FST7789.pdf&ref=openhardware.directory&product=heltec-vision-master-t190&source=md-export)

## Protocols

- **SPI** (SPI (Display)): SCK=GPIO38, MOSI=GPIO48, CS=GPIO39, DC=GPIO47, RST=GPIO40
- **SPI** (SPI (LoRa)): SCK=GPIO9, MOSI=GPIO10, MISO=GPIO11, NSS=GPIO8
- **I2C** (I2C (Sensor)): SDA=GPIO2, SCL=GPIO1
- **UART** (UART0): TX=GPIO43, RX=GPIO44
- **USB** (USB-C): D+=GPIO20, D-=GPIO19

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | I2C SCL (Sensor Port) | — | digital-input, digital-output, pwm |
| GPIO2 | I2C SDA (Sensor Port) | — | digital-input, digital-output, pwm, adc, touch |
| GPIO3 | ADC1_CH2 / Touch3 | — | digital-input, digital-output, pwm, adc, touch |
| GPIO4 | ADC1_CH3 / Touch4 | — | digital-input, digital-output, pwm, adc, touch |
| GPIO5 | ADC1_CH4 / Touch5 | — | digital-input, digital-output, pwm, adc, touch |
| GPIO6 | Battery ADC | — | digital-input, digital-output, pwm, adc, touch |
| GPIO7 | TFT VCtrl (Display Power) | — | digital-input, digital-output, pwm, adc, touch |
| GPIO8 | LoRa NSS (SPI CS) | — | digital-input, digital-output, pwm, adc, touch |
| GPIO9 | LoRa SCK | — | digital-input, digital-output, pwm, adc, touch |
| GPIO10 | LoRa MOSI | — | digital-input, digital-output, pwm, adc, touch |
| GPIO11 | LoRa MISO | — | digital-input, digital-output, pwm, adc |
| GPIO12 | LoRa RST | — | digital-input, digital-output, pwm, adc |
| GPIO13 | LoRa BUSY | — | digital-input, digital-output, pwm, adc, touch |
| GPIO14 | LoRa DIO1 | — | digital-input, digital-output, pwm, adc, touch |
| GPIO15 | 32K_P (Crystal) | — | digital-input, digital-output, pwm, adc |
| GPIO16 | 32K_N (Crystal) | — | digital-input, digital-output, pwm, adc |
| GPIO17 | TFT Backlight Control | — | digital-input, digital-output, pwm, adc |
| GPIO18 | GPIO18 | — | digital-input, digital-output, pwm |
| GPIO19 | USB D- | — | digital-input, digital-output |
| GPIO20 | USB D+ | — | digital-input, digital-output |
| GPIO21 | User Button (BOOT1) | — | digital-input, digital-output, pwm |
| GPIO38 | TFT SCK (Display SPI) | — | digital-input, digital-output, pwm |
| GPIO39 | TFT CS (Display SPI) | — | digital-input, digital-output, pwm |
| GPIO40 | TFT RST (Display) | — | digital-input, digital-output, pwm |
| GPIO43 | UART TX (U0TXD) | — | digital-input, digital-output, pwm |
| GPIO44 | UART RX (U0RXD) | — | digital-input, digital-output, pwm |
| GPIO47 | TFT DC (Display) | — | digital-input, digital-output, pwm |
| GPIO48 | TFT MOSI (Display SPI) | — | digital-input, digital-output, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Heltec Official](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fvision-master-t190%2F&ref=openhardware.directory&product=heltec-vision-master-t190&source=md-export) — $17.90
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-Meshtastic-Development-Compatible-902-928MHz%2Fdp%2FB0D818DT7R&ref=openhardware.directory&product=heltec-vision-master-t190&source=md-export) — $19.99

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fvision-master-t190%2F&ref=openhardware.directory&product=heltec-vision-master-t190&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHeltec-Aaron-Lee%2FWiFi_Kit_series&ref=openhardware.directory&product=heltec-vision-master-t190&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fesp32-series%2Fvision-master%2Fvison-master-t190%2F&ref=openhardware.directory&product=heltec-vision-master-t190&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-VMT190%2FHT-VMT190%2520Datasheet.pdf&ref=openhardware.directory&product=heltec-vision-master-t190&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-VMT190%2FHT-VMT90%2520Schematic%2520Diagram.pdf&ref=openhardware.directory&product=heltec-vision-master-t190&source=md-export)

## Tags

`esp32-s3`, `lora`, `meshtastic`, `tft-display`, `iot`, `lorawan`, `heltec`

---
[View full device page](https://openhardware.directory/s/1370/heltec-vision-master-t190)

---

# BigTreeTech Panda Knomi

> 1.28-inch round 240x240 display for Bambu Lab A1, X1, and P1 series printers. ESP32 MCU with 2.4GHz WiFi, customizable GIF animations, shows print status and temperatures wirelessly.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Display
- **CPU:** ESP32 dual-core Xtensa LX6 @ 240MHz
- **RAM:** 4MB PSRAM,4MB Himem
- **Flash:** 16MB
- **Power:** 5V-24V DC (0.65W)

## Connectivity

WiFi true

## Compatible Firmware

- Klipper

## Components

- **ESP32** (mcu): Espressif ESP32 dual-core Xtensa LX6 @ 240MHz with 2.4GHz WiFi (802.11 b/g/n) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=bigtreetech-panda-knomi&source=md-export)
- **GC9A01** (display-driver): Galaxycore GC9A01 SPI LCD driver for 1.28-inch 240x240 circular displays — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fdatasheet%2FLCD_en_PDF%2FGC9A01A.pdf&ref=openhardware.directory&product=bigtreetech-panda-knomi&source=md-export)

## Protocols

- **SPI**
- **WiFi**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fpanda-knomi&ref=openhardware.directory&product=bigtreetech-panda-knomi&source=md-export)

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FPandaKnomi&ref=openhardware.directory&product=bigtreetech-panda-knomi&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fpanda-knomi&ref=openhardware.directory&product=bigtreetech-panda-knomi&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.bttwiki.com%2FPandaKnomi.html&ref=openhardware.directory&product=bigtreetech-panda-knomi&source=md-export)

## Tags

`3d-printing`, `display`, `bambu-lab`, `esp32`, `round-display`, `1.28-inch`, `bigtreetech`, `wifi`, `custom-gif`, `toolhead-display`, `panda-knomi`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-panda-knomi)

---

# LILYGO T-Display S3 AMOLED 1.64

> ESP32-S3 development board with a 1.64" ICNA3311 AMOLED display at 280×456 resolution, 16MB Flash, 8MB PSRAM, Wi-Fi and Bluetooth 5 LE connectivity.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$22.99
- **CPU:** ESP32-S3R8
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n 2.4 GHz | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3R8** (mcu): Dual-core Xtensa LX7 MCU running at up to 240 MHz with 8MB PSRAM, Wi-Fi 802.11 b/g/n and Bluetooth 5 LE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-display-s3-amoled-1-64&source=md-export)
- **ICNA3311** (display-driver): 1.64-inch AMOLED display driver IC with QSPI interface, 280×456 resolution — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Display-S3-AMOLED-1.64&ref=openhardware.directory&product=lilygo-t-display-s3-amoled-1-64&source=md-export)

## Protocols

- **QSPI**
- **I2C**
- **SPI**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-s3-amoled-1-64&ref=openhardware.directory&product=lilygo-t-display-s3-amoled-1-64&source=md-export) — $22.99

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-s3-amoled-1-64&ref=openhardware.directory&product=lilygo-t-display-s3-amoled-1-64&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Display-S3-AMOLED-1.64&ref=openhardware.directory&product=lilygo-t-display-s3-amoled-1-64&source=md-export)

## Tags

`esp32-s3`, `amoled`, `display`, `wifi`, `bluetooth`, `lilygo`, `1.64-inch`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-display-s3-amoled-1-64)

---

# LILYGO T-Display S3 Long

> ESP32-S3 development board with an elongated 3.4" capacitive touch TFT LCD (180×640 resolution), 16MB Flash, 8MB PSRAM, Wi-Fi, Bluetooth 5, and optional enclosure variant.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$29.35
- **CPU:** ESP32-S3R8
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n 2.4 GHz | Bluetooth Bluetooth 5.0 + Mesh

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3R8** (mcu): Dual-core Xtensa LX7 MCU at up to 240 MHz with 8MB PSRAM, Wi-Fi 802.11 b/g/n and Bluetooth 5 LE with BT mesh — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-display-s3-long&source=md-export)

## Protocols

- **QSPI**
- **I2C**
- **SPI**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-s3-long&ref=openhardware.directory&product=lilygo-t-display-s3-long&source=md-export) — $29.35

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-s3-long&ref=openhardware.directory&product=lilygo-t-display-s3-long&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Display-S3-Long&ref=openhardware.directory&product=lilygo-t-display-s3-long&source=md-export)

## Tags

`esp32-s3`, `display`, `tft`, `touch`, `wifi`, `bluetooth`, `lilygo`, `long-display`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-display-s3-long)

---

# LILYGO T-Beam BPF

> LILYGO T-Beam BPF is an ESP32-S3 LoRa development board variant featuring an onboard Band Pass Filter for improved RF selectivity, designed for the 144–148 MHz amateur radio band with GPS and OLED display.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$56.34
- **CPU:** ESP32-S3FN8 (ESP32-53FN8)
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + Li-Ion 18650

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- meshtastic
- esp32aprs

## Components

- **ESP32-S3FN8** (mcu): ESP32-S3 dual-core LX7 microprocessor with 16MB flash, 8MB PSRAM, Wi-Fi, and Bluetooth 5 LE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-beam-bpf&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver for sub-GHz communication with integrated Band Pass Filter for the 144–148 MHz VHF amateur radio band — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-beam-bpf&source=md-export)
- **SSD1306** (display-driver): 0.96 inch SSD1306 I2C OLED display driver with 128x64 resolution for status and telemetry display — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t-beam-bpf&source=md-export)
- **AXP2101** (pmu): AXP2101 PMU for 18650 battery charging, power regulation, and power management — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.x-powers.com%2Fen.php%2FInfo%2Fproduct_detail%2Farticle_id%2F95&ref=openhardware.directory&product=lilygo-t-beam-bpf&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **GPIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-beam-bpf&ref=openhardware.directory&product=lilygo-t-beam-bpf&source=md-export) — $56.34
- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Flilygo-t-beam-bpf-lora&ref=openhardware.directory&product=lilygo-t-beam-bpf&source=md-export) — €72.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-beam-bpf&ref=openhardware.directory&product=lilygo-t-beam-bpf&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-LoRa-Series&ref=openhardware.directory&product=lilygo-t-beam-bpf&source=md-export)

## Tags

`esp32-s3`, `lora`, `band-pass-filter`, `vhf`, `amateur-radio`, `aprs`, `t-beam`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-beam-bpf)

---

# LILYGO T3 S3 V1.3

> ESP32-S3 LoRa development board (hardware revision V1.3) with 0.96-inch SSD1306 OLED, 4MB Flash, 2MB PSRAM, WiFi, BLE 5.0, and support for SX1262/SX1276/SX1280/LR1121 radio modules at 433/868/915MHz and 2.4GHz.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$13.61
- **CPU:** ESP32-S3FH4R2
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio
- meshtastic
- meshcore

## Components

- **ESP32-S3FH4R2** (mcu): Dual-core Xtensa LX7 at 240MHz with 4MB Flash, 2MB PSRAM, WiFi, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t3-s3-v1-3&source=md-export)
- **SSD1306** (display): 0.96-inch monochrome OLED at 128×64 resolution via I2C (SDA IO18, SCL IO17). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t3-s3-v1-3&source=md-export)
- **SX1262** (radio): Semtech SX1262 sub-GHz LoRa transceiver supporting 433/868/915MHz bands (variant-dependent). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t3-s3-v1-3&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft3-s3-v1-3&ref=openhardware.directory&product=lilygo-t3-s3-v1-3&source=md-export) — $13.61

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft3-s3-v1-3&ref=openhardware.directory&product=lilygo-t3-s3-v1-3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT3-S3&ref=openhardware.directory&product=lilygo-t3-s3-v1-3&source=md-export)

## Tags

`esp32-s3`, `lora`, `sx1262`, `sx1276`, `sx1280`, `lr1121`, `oled`, `meshtastic`, `iot`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t3-s3-v1-3)

---

# LILYGO T3 TCXO

> ESP32 LoRa development board with a Temperature Compensated Crystal Oscillator (TCXO) for enhanced LoRa frequency stability, 0.96-inch SSD1306 OLED display, 4MB Flash, WiFi, BLE 4.2, TF card slot, and LiPo battery support at 868/915MHz.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$22.88
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- platformio
- meshtastic

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 at 240MHz with 520KB SRAM, WiFi, and Bluetooth 4.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t3-tcxo&source=md-export)
- **SSD1306** (display): 0.96-inch monochrome OLED at 128×64 resolution via I2C (SDA IO21, SCL IO22). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t3-tcxo&source=md-export)
- **SX1276** (radio): Semtech SX1276 LoRa transceiver with Temperature Compensated Crystal Oscillator for improved frequency stability across temperature ranges. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1276-7-8-9_W_APP_V7.pdf&ref=openhardware.directory&product=lilygo-t3-tcxo&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft3-tcxo&ref=openhardware.directory&product=lilygo-t3-tcxo&source=md-export) — $22.88

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft3-tcxo&ref=openhardware.directory&product=lilygo-t3-tcxo&source=md-export)

## Tags

`esp32`, `lora`, `tcxo`, `oled`, `ssd1306`, `meshtastic`, `iot`, `development-board`, `lorawan`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t3-tcxo)

---

# LILYGO T-TV

> ESP32 desktop gadget with a 1.54-inch transparent blue OLED display, IR receiver, touch control, Wi-Fi, and Bluetooth. Ships with factory firmware featuring a clock, games, and animations.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$26.34
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 at up to 240MHz with Wi-Fi and Bluetooth 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-tv&source=md-export)
- **TTP223** (touch-controller): Single-channel capacitive touch detection IC for user input — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Fszlcsc%2FTTP223-BA6_C80757.pdf&ref=openhardware.directory&product=lilygo-t-tv&source=md-export)
- **HS0038** (ir-receiver): 38kHz infrared receiver for remote control functionality — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.vishay.com%2Fdocs%2F82492%2Ftsop382.pdf&ref=openhardware.directory&product=lilygo-t-tv&source=md-export)

## Protocols

- **I2C**
- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-tv&ref=openhardware.directory&product=lilygo-t-tv&source=md-export) — $26.34

## Available Software

- [Arduino IDE](https://openhardware.directory/r?to=https%3A%2F%2Fwww.arduino.cc%2F&ref=openhardware.directory&product=lilygo-t-tv&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-tv&ref=openhardware.directory&product=lilygo-t-tv&source=md-export)

## Tags

`esp32`, `oled`, `transparent-display`, `ir`, `desktop-gadget`, `clock`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-tv)

---

# LILYGO T-Dongle ESP32-S2

> USB-A dongle form factor board with ESP32-S2, 1.14-inch ST7789V IPS LCD, Wi-Fi, OTG, TF card slot, and Grove connector. Predecessor to the T-Dongle S3 series, ideal for portable USB IoT devices.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S2
- **Price:** ~$10.44
- **CPU:** ESP32-S2
- **RAM:** 320KB
- **Flash:** 4MB
- **USB:** USB-A
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n

## Compatible Firmware

- arduino
- esp-idf
- platformio

## Components

- **ESP32-S2** (mcu): Single-core Xtensa LX7 at 240MHz with Wi-Fi 802.11 b/g/n; no Bluetooth hardware — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-dongle-esp32-s2&source=md-export)
- **ST7789V** (display-driver): 1.14-inch IPS LCD controller; 135×240 resolution at 260 PPI; 4-wire SPI interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.crystalfontz.com%2Fcontrollers%2FSitronix%2FST7789V%2F&ref=openhardware.directory&product=lilygo-t-dongle-esp32-s2&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-dongle-esp32-s2-1-14-inch-lcd-board&ref=openhardware.directory&product=lilygo-t-dongle-esp32-s2&source=md-export) — $10.44

## Available Software

- [Arduino IDE](https://openhardware.directory/r?to=https%3A%2F%2Fwww.arduino.cc%2F&ref=openhardware.directory&product=lilygo-t-dongle-esp32-s2&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-dongle-esp32-s2-1-14-inch-lcd-board&ref=openhardware.directory&product=lilygo-t-dongle-esp32-s2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Dongle-ESP32S2&ref=openhardware.directory&product=lilygo-t-dongle-esp32-s2&source=md-export)

## Tags

`esp32-s2`, `usb-dongle`, `lcd`, `otg`, `portable`, `wifi`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-dongle-esp32-s2)

---

# M5Stack AtomS3

> Ultra-compact ESP32-S3 dev board (24x24mm) with 0.85" IPS LCD (128x128), 6-axis IMU, 8MB flash, Wi-Fi, BLE 5.0, USB-C, and Grove port. Ideal for IoT prototyping and embedded UI projects.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$15.5
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **GPIO:** 6 pins
- **USB:** USB-C
- **Power:** 5V DC

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- uiflow
- micropython
- platformio

## Components

- **ESP32-S3FN8** (MCU): Espressif ESP32-S3 SoC with 8MB embedded flash, dual-core Xtensa LX7 at 240MHz, Wi-Fi 802.11 b/g/n and Bluetooth LE 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-atoms3&source=md-export)
- **MPU6886** (IMU): TDK InvenSense 6-axis MEMS IMU with 3-axis gyroscope and 3-axis accelerometer, I2C interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fwp-content%2Fuploads%2F2021%2F12%2FDS-000451-MPU-6886-TYP-v1.3.pdf&ref=openhardware.directory&product=m5stack-atoms3&source=md-export)
- **0.85" IPS LCD** (Display): 128x128 pixel IPS LCD for compact UI rendering and status display — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FAtomS3&ref=openhardware.directory&product=m5stack-atoms3&source=md-export)
- **Infrared LED** (LED): Built-in IR LED for infrared remote control signal transmission — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FAtomS3&ref=openhardware.directory&product=m5stack-atoms3&source=md-export)
- **Grove Port** (Connector): 4-pin Grove connector (I2C) for plug-and-play sensor and actuator modules — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2FGrove_System%2F&ref=openhardware.directory&product=m5stack-atoms3&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **GPIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fatoms3-dev-kit-w-0-85-inch-screen&ref=openhardware.directory&product=m5stack-atoms3&source=md-export) — $15.50
- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stack-atoms3devkit&ref=openhardware.directory&product=m5stack-atoms3&source=md-export) — $16.15

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fatoms3-dev-kit-w-0-85-inch-screen&ref=openhardware.directory&product=m5stack-atoms3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FAtomS3&ref=openhardware.directory&product=m5stack-atoms3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5AtomS3&ref=openhardware.directory&product=m5stack-atoms3&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FAtomS3&ref=openhardware.directory&product=m5stack-atoms3&source=md-export)

## Tags

`esp32-s3`, `m5stack`, `imu`, `lcd`, `compact`, `grove`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-atoms3)

---

# Louder Raspberry HAT Plus

> Open-source Raspberry Pi audio HAT featuring TAS5825M Class-D amplifier with integrated DSP, delivering 32W per channel at 8 ohms. Includes 15-band parametric EQ, FIR filtering, DRC, IR input, and onboard step-down converter to power the Pi from 7-26V.

## Quick Facts

- **Brand:** Sonocotta
- **Board Type:** raspberry-pi-hat
- **Price:** ~$25
- **CPU:** N/A (HAT expansion board — uses host Raspberry Pi CPU)
- **RAM:** N/A (HAT)
- **Flash:** N/A (HAT)
- **Power:** 7-28V DC
- **Dimensions:** 65mm x 56mm x 20mm

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- volumio
- squeezelite
- snapcast
- music-assistant
- home-assistant-voice

## Components

- **TAS5825M** (audio-amplifier): Texas Instruments 38W stereo closed-loop Class-D amplifier with integrated DAC and advanced DSP featuring 15-band PEQ, 128-tap FIR, 3-band DRC, and speaker protection. Supports I2S/TDM input at up to 192kHz in a 5x5mm VQFN-32 package. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftas5825m&ref=openhardware.directory&product=louder-raspberry-hat-plus&source=md-export)
- **ir-receiver** (sensor): Infrared receiver connected to GPIO 17 for decoding standard consumer IR remote control signals (38kHz carrier). Enabled with a single dtoverlay line in /boot/config.txt. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.vishay.com%2Fdocs%2F82491%2Ftsop382.pdf&ref=openhardware.directory&product=louder-raspberry-hat-plus&source=md-export)
- **dc-dc-step-down** (power-management): Onboard buck converter accepting 7-26V input and providing regulated 5V at up to 3A continuous output to power the host Raspberry Pi through the GPIO header. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftps54331&ref=openhardware.directory&product=louder-raspberry-hat-plus&source=md-export)

## Protocols

- **I2S**
- **I2C**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO 2 | I2C Data (SDA) | — | — |
| GPIO 3 | I2C Clock (SCL) | — | — |
| GPIO 4 | DAC Power Down | — | — |
| GPIO 17 | IR Input | — | — |
| GPIO 18 | I2S Bit Clock (BCLK) | — | — |
| GPIO 19 | I2S Data (DIN) | — | — |
| GPIO 21 | I2S Word Select (LRCLK) | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** GPL-3.0

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fsonocotta%2Flouder-raspberry-hat-plus%2F&ref=openhardware.directory&product=louder-raspberry-hat-plus&source=md-export) — $25.00

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fsonocotta%2Flouder-raspberry-hat-plus%2F&ref=openhardware.directory&product=louder-raspberry-hat-plus&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsonocotta%2Fraspberry-media-center&ref=openhardware.directory&product=louder-raspberry-hat-plus&source=md-export)
- [hackaday](https://openhardware.directory/r?to=https%3A%2F%2Fhackaday.io%2Fproject%2F195272&ref=openhardware.directory&product=louder-raspberry-hat-plus&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftas5825m&ref=openhardware.directory&product=louder-raspberry-hat-plus&source=md-export)

## Tags

`raspberry-pi`, `audio`, `amplifier`, `dac`, `dsp`, `class-d`, `i2s`, `open-source`, `hat`, `tas5825m`, `hi-fi`, `multi-room`

---
[View full device page](https://openhardware.directory/s/1370/louder-raspberry-hat-plus)

---

# ESP32-S3-DevKitC-1

> Espressif official ESP32-S3 development board with ESP32-S3-WROOM-1 module, dual-core 240 MHz LX7, up to 45 GPIO, dual USB ports, and available in three memory variants: 8MB/2MB PSRAM, 8MB/8MB PSRAM, and 32MB/16MB PSRAM (WROOM-2).

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$17.5
- **CPU:** Xtensa LX7 dual-core @ 240 MHz (ESP32-S3)
- **RAM:** 512 KB SRAM
- **Flash:** 8MB (N8R2/N8R8) or 32MB (WROOM-2)
- **Power:** 5V via USB-C or header pins

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- esp-idf
- arduino
- micropython

## Components

- **ESP32-S3-WROOM-1 / WROOM-2** (mcu): Espressif ESP32-S3-WROOM-1 (8 MB Flash, 2 MB or 8 MB PSRAM) or WROOM-2 (32 MB Flash, 16 MB PSRAM) module with dual-core 240 MHz Xtensa LX7, WiFi, and BLE 5. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s3-devkitc-1&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO35, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**
- **CAN**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | GPIO1 | — | ADC, touch, GPIO |
| GPIO2 | GPIO2 | — | ADC, touch, GPIO |
| GPIO3 | GPIO3 | — | ADC, touch, GPIO |
| GPIO4 | GPIO4 | — | ADC, touch, GPIO |
| GPIO5 | GPIO5 | — | ADC, touch, GPIO |
| GPIO6 | GPIO6 | — | ADC, touch, GPIO |
| GPIO7 | GPIO7 | — | ADC, touch, GPIO |
| GPIO8 | GPIO8 | — | ADC, touch, GPIO |
| GPIO9 | GPIO9 | — | ADC, touch, GPIO |
| GPIO10 | GPIO10 | — | ADC, touch, GPIO |
| GPIO11 | GPIO11 | — | ADC, touch, GPIO |
| GPIO12 | GPIO12 | — | ADC, touch, GPIO |
| GPIO13 | GPIO13 | — | ADC, touch, GPIO |
| GPIO14 | GPIO14 | — | ADC, GPIO |
| GPIO21 | GPIO21 | — | GPIO, PWM |
| GPIO35 | MOSI | — | SPI, GPIO |
| GPIO36 | MISO | — | SPI, GPIO |
| GPIO37 | SCK | — | SPI, GPIO |
| GPIO38 | GPIO38 | — | GPIO, PWM |
| GPIO39 | GPIO39 | — | GPIO |
| GPIO40 | GPIO40 | — | GPIO |
| GPIO41 | GPIO41 | — | GPIO |
| GPIO42 | GPIO42 | — | GPIO |
| GPIO43 | TX | — | UART, GPIO |
| GPIO44 | RX | — | UART, GPIO |
| GPIO45 | GPIO45 | — | GPIO |
| GPIO46 | GPIO46 | — | GPIO |
| GPIO47 | GPIO47 | — | GPIO |
| GPIO48 | RGB_LED | — | GPIO |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit (N8R2)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5310&ref=openhardware.directory&product=esp32-s3-devkitc-1&source=md-export) — 17.5
- [Adafruit (N8R8)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5336&ref=openhardware.directory&product=esp32-s3-devkitc-1&source=md-export) — 19.95
- [Adafruit (WROOM-2 32MB/16MB)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5364&ref=openhardware.directory&product=esp32-s3-devkitc-1&source=md-export) — 19.95

## Available Software

- [ESP-IDF](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.espressif.com%2Fprojects%2Fesp-idf%2F&ref=openhardware.directory&product=esp32-s3-devkitc-1&source=md-export)
- [Arduino ESP32](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Farduino-esp32&ref=openhardware.directory&product=esp32-s3-devkitc-1&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5310&ref=openhardware.directory&product=esp32-s3-devkitc-1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp32-s3&ref=openhardware.directory&product=esp32-s3-devkitc-1&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s3-devkitc-1&source=md-export)

## Tags

`esp32-s3`, `devkitc`, `espressif`, `esp-idf`, `wifi`, `ble`, `dual-usb`, `wroom-1`

---
[View full device page](https://openhardware.directory/s/1370/esp32-s3-devkitc-1)

---

# ESP32-S2 Saola 1R Dev Kit

> Espressif official ESP32-S2-WROVER development board with dual 20-pin headers (breadboard-friendly), 8MB Flash, 2MB PSRAM, WiFi, dual Micro-USB (native USB + UART bridge), NeoPixel RGB LED, and boot/reset buttons.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$14.5
- **CPU:** Xtensa LX7 single-core @ 240MHz (ESP32-S2)
- **RAM:** 320KB SRAM + 2MB PSRAM
- **Flash:** 8MB SPI Flash
- **Power:** 5V via Micro-USB

## Connectivity

WiFi 802.11 b/g/n @ 2.4GHz (ESP32-S2 WROVER) | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- esp-idf
- arduino
- circuitpython
- micropython

## Components

- **ESP32-S2** (mcu): Espressif ESP32-S2 single-core Xtensa LX7 @ 240MHz, 320KB SRAM, WiFi, native USB 1.1 OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s2-saola-1r-dev-kit&source=md-export)

## Protocols

- **SPI**: MOSI=GPIO35, MISO=GPIO37, SCK=GPIO36
- **I2C**: SDA=GPIO8, SCL=GPIO9
- **UART**: TX=GPIO43, RX=GPIO44
- **I2S**
- **USB**: D-=GPIO19, D+=GPIO20
- **ADC**
- **DAC**: DAC1=GPIO17, DAC2=GPIO18
- **Touch**
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | ADC1_CH0/Touch1 | — | ADC, Touch, GPIO |
| GPIO2 | ADC1_CH1/Touch2 | — | ADC, Touch, GPIO |
| GPIO3 | ADC1_CH2/Touch3/SDA | — | I2C, ADC, Touch, GPIO |
| GPIO4 | ADC1_CH3/Touch4/SCL | — | I2C, ADC, Touch, GPIO |
| GPIO5 | ADC1_CH4/Touch5 | — | ADC, Touch, GPIO |
| GPIO6 | ADC1_CH5/Touch6 | — | ADC, Touch, GPIO |
| GPIO7 | ADC1_CH6/Touch7 | — | ADC, Touch, GPIO |
| GPIO8 | ADC1_CH7/Touch8 | — | ADC, Touch, GPIO |
| GPIO9 | ADC1_CH8/Touch9 | — | ADC, Touch, GPIO |
| GPIO10 | ADC1_CH9/Touch10 | — | ADC, Touch, GPIO |
| GPIO11 | ADC2_CH0/Touch11 | — | ADC, Touch, GPIO |
| GPIO12 | ADC2_CH1/Touch12 | — | ADC, Touch, GPIO |
| GPIO13 | ADC2_CH2/Touch13 | — | ADC, Touch, GPIO |
| GPIO14 | ADC2_CH3/Touch14 | — | ADC, Touch, GPIO |
| GPIO15 | ADC2_CH4 | — | ADC, GPIO |
| GPIO16 | ADC2_CH5 | — | ADC, GPIO |
| GPIO17 | ADC2_CH6/DAC1 | — | DAC, ADC, GPIO |
| GPIO18 | ADC2_CH7/DAC2 | — | DAC, ADC, GPIO |
| GPIO19 | USB_D- | — | USB, GPIO |
| GPIO20 | USB_D+ | — | USB, GPIO |
| GPIO21 | GPIO | — | GPIO |
| GPIO35 | MOSI | — | SPI, GPIO |
| GPIO36 | SCK | — | SPI, GPIO |
| GPIO37 | MISO | — | SPI, GPIO |
| GPIO43 | TX | — | UART, GPIO |
| GPIO44 | RX | — | UART, GPIO |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4693&ref=openhardware.directory&product=esp32-s2-saola-1r-dev-kit&source=md-export) — 14.5

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4693&ref=openhardware.directory&product=esp32-s2-saola-1r-dev-kit&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4693&ref=openhardware.directory&product=esp32-s2-saola-1r-dev-kit&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.espressif.com%2Fprojects%2Fesp-idf%2Fen%2Flatest%2Fesp32s2%2Fhw-reference%2Fesp32s2%2Fuser-guide-saola-1-v1.2.html&ref=openhardware.directory&product=esp32-s2-saola-1r-dev-kit&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-idf&ref=openhardware.directory&product=esp32-s2-saola-1r-dev-kit&source=md-export)

## Tags

`esp32-s2`, `dev-kit`, `wifi`, `espressif`, `psram`, `circuitpython`, `usb-otg`, `breadboard`

## Certifications

RoHS, FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/esp32-s2-saola-1r-dev-kit)

---

# Adafruit HUZZAH32 – ESP32 Feather

> ESP32 dual-core 240 MHz Feather board with 802.11b/g/n WiFi, Bluetooth 4.2 Classic and BLE, 4MB flash, 520KB SRAM, 12 ADC channels, 2 DACs, capacitive touch, and built-in LiPo charger.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$19.95
- **CPU:** ESP32 dual-core Xtensa LX6 @ 240 MHz
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **Power:** 5V + LiPo
- **Dimensions:** 51 × 22.7 × 7.3 mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- circuitpython
- esp-idf

## Components

- **ESP32-WROOM-32** (mcu): Espressif ESP32 WROOM32 module with dual-core LX6 at 240MHz, 520KB SRAM, 4MB flash, 802.11b/g/n WiFi and Bluetooth 4.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-huzzah32-esp32&source=md-export)

## Protocols

- **SPI**: MOSI=GPIO23, MISO=GPIO19, SCK=GPIO18
- **I2C**: SDA=GPIO21, SCL=GPIO22
- **UART**: TX=GPIO17, RX=GPIO16
- **I2S**
- **802.11 b/g/n**
- **BLE**
- **Bluetooth Classic**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO26 | A0/DAC1 — Analog In / DAC | — | analog-input, analog-output |
| GPIO25 | A1/DAC2 — Analog In / DAC | — | analog-input, analog-output |
| GPIO34 | A2 — Analog In (input only) | — | analog-input |
| GPIO39 | A3 — Analog In (input only) | — | analog-input |
| GPIO36 | A4 — Analog In (input only) | — | analog-input |
| GPIO4 | A5/D4 — GPIO / Analog In | — | digital-input, digital-output, analog-input |
| GPIO13 | D13/LED — GPIO / LED | — | digital-input, digital-output |
| GPIO12 | D12 — GPIO / Analog In | — | digital-input, digital-output, analog-input |
| GPIO14 | D14 — GPIO / Analog In | — | digital-input, digital-output, analog-input |
| GPIO15 | D15 — GPIO / Analog In | — | digital-input, digital-output, analog-input |
| GPIO16 | D16/RX — GPIO / UART RX | — | digital-input, digital-output |
| GPIO17 | D17/TX — GPIO / UART TX | — | digital-input, digital-output |
| GPIO21 | D21/SDA — GPIO / I2C SDA | — | digital-input, digital-output |
| GPIO22 | D22/SCL — GPIO / I2C SCL | — | digital-input, digital-output |
| GPIO18 | D18/SCK — GPIO / SPI SCK | — | digital-input, digital-output |
| GPIO19 | D19/MISO — GPIO / SPI MISO | — | digital-input, digital-output |
| GPIO23 | D23/MOSI — GPIO / SPI MOSI | — | digital-input, digital-output |
| GPIO32 | D32 — GPIO / Analog In | — | digital-input, digital-output, analog-input |
| GPIO33 | D33 — GPIO / Analog In | — | digital-input, digital-output, analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3405&ref=openhardware.directory&product=adafruit-huzzah32-esp32&source=md-export) — 19.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3405&ref=openhardware.directory&product=adafruit-huzzah32-esp32&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-HUZZAH32-ESP32-Feather-PCB&ref=openhardware.directory&product=adafruit-huzzah32-esp32&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-huzzah32-esp32-feather%2Foverview&ref=openhardware.directory&product=adafruit-huzzah32-esp32&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-huzzah32-esp32&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fassets%2Fassets%2F000%2F041%2F630%2Fmedium800%2Ffeather_schem.png&ref=openhardware.directory&product=adafruit-huzzah32-esp32&source=md-export)

## Tags

`feather`, `esp32`, `wifi`, `bluetooth`, `dual-core`, `huzzah32`, `lipo-charger`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-huzzah32-esp32)

---

# BigTreeTech HDMI5 V1.0

> 5-inch 800x480 IPS HDMI capacitive touchscreen display. Compatible with Raspberry Pi, BTT SBCs, and any HDMI source. USB-C data port, 3.5mm audio jack, 5-point touch, auto-driver on PC.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Display
- **Price:** ~$39.6
- **CPU:** N/A (HDMI display)
- **RAM:** No
- **Flash:** No
- **USB:** 1x USB Type-C (data)
- **Power:** 5V DC

## Compatible Firmware

- Klipper

## Components

- **5-inch IPS 800x480** (display): 5-inch IPS LCD panel, 800x480 resolution, 160° viewing angle, 5-point capacitive touch — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBIGTREETECH-HDMI5-V1.0&ref=openhardware.directory&product=bigtreetech-hdmi5-v1-0&source=md-export)

## Protocols

- **HDMI**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-hdmi5-v1-0-hdmi7-v1-0&ref=openhardware.directory&product=bigtreetech-hdmi5-v1-0&source=md-export)

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBIGTREETECH-HDMI5-V1.0&ref=openhardware.directory&product=bigtreetech-hdmi5-v1-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-hdmi5-v1-0-hdmi7-v1-0&ref=openhardware.directory&product=bigtreetech-hdmi5-v1-0&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.bttwiki.com%2FHDMI5.html&ref=openhardware.directory&product=bigtreetech-hdmi5-v1-0&source=md-export)

## Tags

`3d-printing`, `display`, `hdmi`, `touchscreen`, `5-inch`, `ips`, `klipper`, `klipperscreen`, `bigtreetech`, `raspberry-pi`, `universal`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-hdmi5-v1-0)

---

# BigTreeTech HDMI7 V1.0

> 7-inch 1024x600 IPS HDMI capacitive touchscreen display. Universal compatibility with Raspberry Pi, BTT SBCs, and any HDMI source. USB-C touch, 3.5mm audio output, 5-point touch, 160° viewing angle.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Display
- **CPU:** N/A (HDMI display)
- **RAM:** No
- **Flash:** No
- **USB:** 1x USB Type-C (data)
- **Power:** 5V DC

## Compatible Firmware

- Klipper

## Components

- **7-inch IPS 1024x600** (display): 7-inch IPS LCD panel, 1024x600 resolution, 160° viewing angle, 5-point capacitive touch — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.bttwiki.com%2FHDMI7%2520V1.0.html&ref=openhardware.directory&product=bigtreetech-hdmi7-v1-0&source=md-export)

## Protocols

- **HDMI**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-hdmi5-v1-0-hdmi7-v1-0&ref=openhardware.directory&product=bigtreetech-hdmi7-v1-0&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-hdmi5-v1-0-hdmi7-v1-0&ref=openhardware.directory&product=bigtreetech-hdmi7-v1-0&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.bttwiki.com%2FHDMI7%2520V1.0.html&ref=openhardware.directory&product=bigtreetech-hdmi7-v1-0&source=md-export)

## Tags

`3d-printing`, `display`, `hdmi`, `touchscreen`, `7-inch`, `ips`, `klipper`, `klipperscreen`, `bigtreetech`, `raspberry-pi`, `universal`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-hdmi7-v1-0)

---

# LILYGO LoRa V1.3

> LILYGO LoRa V1.3 is an ESP32 development board with SX1276 LoRa radio at 868/915 MHz, optional 0.96-inch OLED display, Wi-Fi, BLE, and 4MB flash for IoT and LoRa applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$17.99
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro USB (CH9102F)
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- meshtastic

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 at 240MHz with Wi-Fi 802.11 b/g/n, Bluetooth 4.2 BLE, 520KB SRAM, 4MB flash, AES/RSA/ECC/SHA hardware encryption. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-lora-v1-3&source=md-export)
- **SX1276** (radio): Semtech SX1276 LoRa transceiver supporting 868/915 MHz with -148 dBm sensitivity and long-range communication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1276-7-8-9_W_APP_V7.pdf&ref=openhardware.directory&product=lilygo-lora-v1-3&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **PWM**
- **ADC**
- **DAC**
- **LoRa**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Flora-v1-3&ref=openhardware.directory&product=lilygo-lora-v1-3&source=md-export) — $17.99

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Flora-v1-3&ref=openhardware.directory&product=lilygo-lora-v1-3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLilyGO%2FTTGO-LORA32-V2.0&ref=openhardware.directory&product=lilygo-lora-v1-3&source=md-export)

## Tags

`esp32`, `lora`, `sx1276`, `meshtastic`, `oled`, `wifi`, `bluetooth`, `lilygo`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-lora-v1-3)

---

# LILYGO T-HaLow P4

> ESP32-P4 high-performance board with ESP32-C6 WiFi HaLow (802.11ah), 16MB flash, 8MB PSRAM, H.264 1080P video processing, MIPI-CSI/DSI, and BLE 5 — designed for long-range sub-GHz WiFi IoT applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$26.57
- **CPU:** ESP32-P4 RISC-V dual-core @ 400MHz + ESP32-C6 coprocessor
- **RAM:** 768KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi WiFi HaLow 802.11ah (sub-1GHz) + WiFi 6 | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio

## Components

- **ESP32-P4** (mcu): Espressif ESP32-P4 dual-core RISC-V at 400MHz with H.264 1080P video processing, MIPI-CSI/DSI, 16MB flash, 8MB PSRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-p4_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-halow-p4&source=md-export)
- **ESP32-C6** (mcu): Espressif ESP32-C6 providing WiFi 6 (2.4GHz), WiFi HaLow (802.11ah sub-1GHz), BLE 5, and 802.15.4 (Thread/Zigbee). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-halow-p4&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **MIPI CSI**
- **MIPI DSI**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-halow-p4&ref=openhardware.directory&product=lilygo-t-halow-p4&source=md-export) — $26.57

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-halow-p4&ref=openhardware.directory&product=lilygo-t-halow-p4&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Halow-P4&ref=openhardware.directory&product=lilygo-t-halow-p4&source=md-export)

## Tags

`esp32-p4`, `esp32-c6`, `wifi-halow`, `lilygo`, `ble5`, `h264`, `mipi`, `802-11ah`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-halow-p4)

---

# LILYGO T-RS S3

> ESP32-S3 industrial communication board with isolated RS-232 and RS-485 modules (3000V isolation), 7–24V DC input via DB9 connector, Wi-Fi, and Bluetooth 5 LE for Modbus and industrial serial networking applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$22.48
- **CPU:** ESP32-S3 Dual-core Xtensa LX7
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **Power:** 7-28V DC

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio

## Components

- **ESP32-S3** (mcu): Dual-core Xtensa LX7 240MHz ESP32-S3 with 8MB Flash, Wi-Fi and Bluetooth 5 LE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-rs-s3&source=md-export)
- **RSM232MT5V** (other): Isolated RS-232 serial communication module with 3000V isolation and 1200–256000bps baud rate range — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mornsun-power.com%2Fhtml%2Fpdf%2FRSM232MT5V.pdf&ref=openhardware.directory&product=lilygo-t-rs-s3&source=md-export)
- **RSM485MT5V** (other): Isolated RS-485 serial communication module with 3000V isolation, 5V/50mA output, 1200–256000bps baud rate range — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mornsun-power.com%2Fhtml%2Fpdf%2FRSM485MT5V.pdf&ref=openhardware.directory&product=lilygo-t-rs-s3&source=md-export)

## Protocols

- **RS-232**
- **RS-485**
- **Modbus RTU**
- **UART**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-rs-s3&ref=openhardware.directory&product=lilygo-t-rs-s3&source=md-export) — $22.48

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-rs-s3&ref=openhardware.directory&product=lilygo-t-rs-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-RSC3&ref=openhardware.directory&product=lilygo-t-rs-s3&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-rs-s3&source=md-export)

## Tags

`esp32-s3`, `rs485`, `rs232`, `modbus`, `industrial`, `serial`, `isolation`, `wifi`, `bluetooth`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-rs-s3)

---

# Armachat FLIP

> Pocket-sized open-source LoRa mesh messenger with ESP32-S3, RFM95 radio, 2.8" IPS display, and 36-key QWERTY keyboard. Runs Meshtastic and CircuitPython firmware for off-grid text communication.

## Quick Facts

- **Brand:** Bobricius
- **Board Type:** handheld-messenger
- **Price:** ~$52.49
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM
- **Flash:** varies by ESP32-S3 module
- **USB:** USB-C
- **Power:** 5V USB-C / 3.7V 18650 Li-ion
- **Dimensions:** 115 x 95 x 18mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- meshtastic
- circuitpython
- arduino

## Components

- **ESP32-S3** (mcu): Dual-core Xtensa LX7 @ 240MHz with WiFi and BLE 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=armachat-flip&source=md-export)
- **RFM95** (radio): HopeRF LoRa transceiver (SX1276), 868/915MHz, +20dBm, -148dBm sensitivity — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hoperf.com%2Fmodules%2Flora%2FRFM95.html&ref=openhardware.directory&product=armachat-flip&source=md-export)
- **ST7789V** (display): 2.8" IPS LCD controller, 320x240 resolution, SPI interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.newhavendisplay.com%2Fappnotes%2Fdatasheets%2FLCDs%2FST7789V.pdf&ref=openhardware.directory&product=armachat-flip&source=md-export)
- **TP4056** (power): 1A standalone linear Li-Ion battery charger with thermal regulation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdlnmh9ip6v2uc.cloudfront.net%2Fdatasheets%2FPrototyping%2FTP4056.pdf&ref=openhardware.directory&product=armachat-flip&source=md-export)
- **SX1276** (radio): Semtech LoRa transceiver IC inside RFM95 module, 137-1020MHz, 168dB max link budget — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1276&ref=openhardware.directory&product=armachat-flip&source=md-export)

## Protocols

- **SPI**
- **USB**
- **UART**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GP1 | Keyboard Column 1 | — | — |
| GP2 | Keyboard Column 2 | — | — |
| GP3 | Keyboard Column 3 | — | — |
| GP4 | Keyboard Column 4 | — | — |
| GP5 | Keyboard Column 5 | — | — |
| GP6 | Keyboard Row 1 | — | — |
| GP7 | Keyboard Row 5 | — | — |
| GP8 | Keyboard Row 4 | — | — |
| GP9 | Keyboard Row 2 | — | — |
| GP10 | LoRa SPI SCK | — | — |
| GP11 | LoRa SPI MOSI | — | — |
| GP12 | LoRa SPI MISO | — | — |
| GP13 | LoRa SPI CS | — | — |
| GP14 | Keyboard Column 6 | — | — |
| GP15 | Keyboard Row 3 | — | — |
| GP16 | Display DC | — | — |
| GP18 | Display SPI SCK | — | — |
| GP19 | Display SPI MOSI | — | — |
| GP20 | Display Backlight | — | — |
| GP21 | Display SPI CS | — | — |
| GP22 | Keyboard Row 6 | — | — |
| GP28 | LoRa IRQ | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Lectronz](https://openhardware.directory/r?to=https%3A%2F%2Flectronz.com%2Fproducts%2Farmachat-meshtastic-compatible-lora-messenger&ref=openhardware.directory&product=armachat-flip&source=md-export) — $52.49

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flectronz.com%2Fproducts%2Farmachat-meshtastic-compatible-lora-messenger&ref=openhardware.directory&product=armachat-flip&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbobricius%2Farmachat&ref=openhardware.directory&product=armachat-flip&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fhackaday.io%2Fproject%2F171790-armawatch-armachat-long-range-radio-messengers&ref=openhardware.directory&product=armachat-flip&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=armachat-flip&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbobricius%2FArmachat-circuitpython%2Ftree%2Fmain%2FHardware&ref=openhardware.directory&product=armachat-flip&source=md-export)

## Tags

`lora`, `meshtastic`, `esp32-s3`, `off-grid`, `messenger`, `qwerty`, `circuitpython`, `mesh-networking`, `rfm95`, `handheld`

---
[View full device page](https://openhardware.directory/s/1370/armachat-flip)

---

# Sonoff Dual R3

> ESP32-based dual-relay WiFi smart switch with per-channel power monitoring, roller shutter mode, and 2×10A outputs. Ideal for motorized blinds with Tasmota shutter calibration and position tracking.

## Quick Facts

- **Brand:** Sonoff
- **Board Type:** relay-module
- **Price:** ~$14.9
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **Power:** 100-240V AC

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- eWeLink
- tasmota

## Components

- **ESP32** (Microcontroller): Dual-core Xtensa LX6 microcontroller at 240MHz with integrated WiFi 802.11 b/g/n and Bluetooth 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=sonoff-dual-r3&source=md-export)
- **2x 10A Relay** (Relay): Two independent single-pole relays each rated at 10A/240V AC, with interlock mode for motor direction control — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fitead.cc%2Fproduct%2Fsonoff-dualr3%2F&ref=openhardware.directory&product=sonoff-dual-r3&source=md-export)
- **CSE7761** (Sensor): Dual-channel single-phase energy measurement chip providing per-channel voltage, current, and active power readings — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fitead.cc%2Fproduct%2Fsonoff-dualr3%2F&ref=openhardware.directory&product=sonoff-dual-r3&source=md-export)

## Protocols

- **WiFi 802.11 b/g/n**
- **Bluetooth 4.2**
- **MQTT**
- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fitead.cc%2Fproduct%2Fsonoff-dualr3%2F&ref=openhardware.directory&product=sonoff-dual-r3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Ftemplates.blakadder.com%2Fsonoff_DUALR3.html&ref=openhardware.directory&product=sonoff-dual-r3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Farendst%2FTasmota&ref=openhardware.directory&product=sonoff-dual-r3&source=md-export)

## Tags

`esp32`, `wifi`, `tasmota`, `dual-relay`, `shutter-control`, `roller-blind`, `power-monitoring`, `home-automation`, `sonoff`, `motor-control`

---
[View full device page](https://openhardware.directory/s/1370/sonoff-dual-r3)

---

# Adafruit ESP32-S2 Feather

> Feather-format ESP32-S2 board with 4 MB flash, 2 MB PSRAM, native USB-C, STEMMA QT, LiPoly charging, and MAX17048 battery monitor — WiFi IoT in the Feather ecosystem.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$17.5
- **CPU:** Xtensa LX7 single-core @ 240 MHz (ESP32-S2)
- **RAM:** 320 KB SRAM + 2 MB PSRAM
- **Flash:** 4MB
- **Power:** 5V + LiPo
- **Dimensions:** 52.4 × 22.8 × 7.2 mm

## Connectivity

WiFi 2.4GHz 802.11 b/g/n

## Compatible Firmware

- circuitpython
- arduino
- esp-idf

## Components

- **ESP32-S2** (mcu): Espressif ESP32-S2 single-core 240 MHz Xtensa LX7 with native USB OTG, 2.4 GHz WiFi, and 320 KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-esp32-s2-feather&source=md-export)
- **MAX17048** (battery-charger): Maxim MAX17048 Li-Ion/LiPo fuel gauge providing state-of-charge over I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX17048-MAX17049.pdf&ref=openhardware.directory&product=adafruit-esp32-s2-feather&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: SCK=GPIO36, MOSI=GPIO35, MISO=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO17 | A0 | — | ADC |
| GPIO18 | A1 | — | ADC |
| GPIO14 | A2 | — | ADC |
| GPIO15 | A3 | — | ADC |
| GPIO16 | A4 | — | ADC |
| GPIO8 | A5 | — | ADC, touch |
| GPIO5 | D5 | — | GPIO, PWM |
| GPIO6 | D6 | — | GPIO, PWM |
| GPIO9 | D9 | — | GPIO, PWM |
| GPIO10 | D10 | — | GPIO, PWM |
| GPIO11 | D11 | — | GPIO, PWM |
| GPIO12 | D12 | — | GPIO, PWM |
| GPIO13 | D13/LED | — | GPIO, PWM |
| GPIO36 | SCK | — | SPI |
| GPIO35 | MOSI | — | SPI |
| GPIO37 | MISO | — | SPI |
| GPIO3 | SDA (STEMMA QT) | — | I2C, STEMMA QT |
| GPIO4 | SCL (STEMMA QT) | — | I2C, STEMMA QT |
| GPIO43 | TX | — | UART |
| GPIO44 | RX | — | UART |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5000&ref=openhardware.directory&product=adafruit-esp32-s2-feather&source=md-export) — 17.5

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_feather_esp32s2%2F&ref=openhardware.directory&product=adafruit-esp32-s2-feather&source=md-export)
- [Arduino](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.espressif.com%2Fprojects%2Farduino-esp32%2F&ref=openhardware.directory&product=adafruit-esp32-s2-feather&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5000&ref=openhardware.directory&product=adafruit-esp32-s2-feather&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-ESP32-S2-Feather-PCB&ref=openhardware.directory&product=adafruit-esp32-s2-feather&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-esp32-s2-feather&ref=openhardware.directory&product=adafruit-esp32-s2-feather&source=md-export)

## Tags

`esp32-s2`, `feather`, `stemma-qt`, `circuitpython`, `native-usb`, `lipo-charging`, `wifi`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-esp32-s2-feather)

---

# Adafruit ESP32-S2 Feather with BME280

> ESP32-S2 Feather with an onboard BME280 temperature, humidity, and barometric pressure sensor, plus 4 MB flash, 2 MB PSRAM, native USB-C, STEMMA QT, and LiPoly charging.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$24.95
- **CPU:** Xtensa LX7 single-core @ 240 MHz (ESP32-S2)
- **RAM:** 320 KB SRAM + 2 MB PSRAM
- **Flash:** 4MB
- **Power:** 5V + LiPo
- **Dimensions:** 52.4 × 22.9 × 7.2 mm

## Connectivity

WiFi 2.4GHz 802.11 b/g/n

## Compatible Firmware

- circuitpython
- arduino
- esp-idf

## Components

- **ESP32-S2** (mcu): Espressif ESP32-S2 single-core 240 MHz Xtensa LX7 with native USB OTG, 2.4 GHz WiFi, and 320 KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-esp32-s2-feather-bme280&source=md-export)
- **BME280** (sensor): Bosch BME280 combined temperature, humidity, and barometric pressure sensor with I2C interface at 0x77. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bme280-ds002.pdf&ref=openhardware.directory&product=adafruit-esp32-s2-feather-bme280&source=md-export)
- **MAX17048** (battery-charger): Maxim MAX17048 Li-Ion/LiPo fuel gauge providing state-of-charge via I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX17048-MAX17049.pdf&ref=openhardware.directory&product=adafruit-esp32-s2-feather-bme280&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: SCK=GPIO36, MOSI=GPIO35, MISO=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO17 | A0 | — | ADC |
| GPIO18 | A1 | — | ADC |
| GPIO14 | A2 | — | ADC |
| GPIO15 | A3 | — | ADC |
| GPIO16 | A4 | — | ADC |
| GPIO8 | A5 | — | ADC, touch |
| GPIO5 | D5 | — | GPIO, PWM |
| GPIO6 | D6 | — | GPIO, PWM |
| GPIO9 | D9 | — | GPIO, PWM |
| GPIO10 | D10 | — | GPIO, PWM |
| GPIO11 | D11 | — | GPIO, PWM |
| GPIO12 | D12 | — | GPIO, PWM |
| GPIO13 | D13/LED | — | GPIO, PWM |
| GPIO36 | SCK | — | SPI |
| GPIO35 | MOSI | — | SPI |
| GPIO37 | MISO | — | SPI |
| GPIO3 | SDA (STEMMA QT) | — | I2C, STEMMA QT |
| GPIO4 | SCL (STEMMA QT) | — | I2C, STEMMA QT |
| GPIO43 | TX | — | UART |
| GPIO44 | RX | — | UART |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5303&ref=openhardware.directory&product=adafruit-esp32-s2-feather-bme280&source=md-export) — 24.95

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_feather_esp32s2%2F&ref=openhardware.directory&product=adafruit-esp32-s2-feather-bme280&source=md-export)
- [Arduino](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.espressif.com%2Fprojects%2Farduino-esp32%2F&ref=openhardware.directory&product=adafruit-esp32-s2-feather-bme280&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5303&ref=openhardware.directory&product=adafruit-esp32-s2-feather-bme280&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-ESP32-S2-Feather-PCB&ref=openhardware.directory&product=adafruit-esp32-s2-feather-bme280&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-esp32-s2-feather-bme280&ref=openhardware.directory&product=adafruit-esp32-s2-feather-bme280&source=md-export)

## Tags

`esp32-s2`, `feather`, `bme280`, `environmental-sensor`, `circuitpython`, `stemma-qt`, `wifi`, `lipo`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-esp32-s2-feather-bme280)

---

# Adafruit PyBadge LC

> Low-cost credit card-sized gaming/badge board with ATSAMD51J19 at 120MHz, 1.8\" 160x128 TFT, 8 game buttons, 1 NeoPixel, light sensor, buzzer, 2MB SPI flash, and MicroSD. Supports MakeCode Arcade, CircuitPython, and Arduino.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$29.95
- **CPU:** Microchip ATSAMD51J19 ARM Cortex M4F
- **RAM:** 192 KB
- **Flash:** 512 KB
- **Power:** 5V via Micro USB or LiPo battery via JST connector
- **Dimensions:** 85.7mm × 54.6mm × 10mm

## Compatible Firmware

- circuitpython
- arduino

## Components

- **ATSAMD51J19** (mcu): 32-bit ARM Cortex M4F at 120 MHz with 512 KB flash, 192 KB SRAM, AES-256, TRNG, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D5xE5x_Family_Data_Sheet_DS60001507G.pdf&ref=openhardware.directory&product=adafruit-pybadge-lc&source=md-export)
- **ST7735R** (display-driver): 160×128 color TFT LCD controller for game graphics and badge content. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.crystalfontz.com%2Fcontrollers%2FSitronix%2FST7735R%2F&ref=openhardware.directory&product=adafruit-pybadge-lc&source=md-export)

## Protocols

- **I2C**: SDA=D26, SCL=D27
- **SPI**: MOSI=D11, MISO=D12, SCK=D13
- **UART**: TX=D0, RX=D1
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX — UART | — | digital-input, digital-output |
| D1 | TX — UART | — | digital-input, digital-output |
| D5 | D5 — GPIO/PWM | — | digital-input, digital-output, pwm |
| D6 | D6 — GPIO/PWM | — | digital-input, digital-output, pwm |
| D9 | D9 — GPIO/PWM | — | digital-input, digital-output, pwm |
| D10 | D10 — GPIO/PWM | — | digital-input, digital-output, pwm |
| D11 | D11 — MOSI | — | digital-input, digital-output |
| D12 | D12 — MISO | — | digital-input, digital-output |
| D13 | D13 — SCK | — | digital-input, digital-output |
| D26 | SDA — I2C | — | digital-input, digital-output |
| D27 | SCL — I2C | — | digital-input, digital-output |
| A0 | A0 — ADC/DAC | — | analog-input, dac, digital-input, digital-output, pwm |
| A1 | A1 — ADC | — | analog-input, digital-input, digital-output, pwm |
| A2 | A2 — ADC | — | analog-input, digital-input, digital-output, pwm |
| A3 | A3 — ADC | — | analog-input, digital-input, digital-output, pwm |
| A4 | A4 — ADC | — | analog-input, digital-input, digital-output, pwm |
| A5 | A5 — ADC | — | analog-input, digital-input, digital-output, pwm |
| A6 | A6 — ADC | — | analog-input |
| A7 | A7 — Light Sensor/ADC | — | analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3939&ref=openhardware.directory&product=adafruit-pybadge-lc&source=md-export) — 29.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3939&ref=openhardware.directory&product=adafruit-pybadge-lc&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3939&ref=openhardware.directory&product=adafruit-pybadge-lc&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-pybadge&ref=openhardware.directory&product=adafruit-pybadge-lc&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_Arcada&ref=openhardware.directory&product=adafruit-pybadge-lc&source=md-export)

## Tags

`gaming`, `badge`, `makecode-arcade`, `circuitpython`, `arduino`, `atsamd51`, `tft-display`, `portable`, `education`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-pybadge-lc)

---

# Adafruit ESP32-S3 Feather 8MB w.FL Antenna

> ESP32-S3 Feather board with 8MB flash, w.FL external antenna connector (MHF3/IPEX3), native USB-C, MAX17048 battery monitor, LiPo charging, NeoPixel, and STEMMA QT.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** feather
- **Price:** ~$17.5
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM
- **Flash:** 8 MB
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- esp-idf
- arduino
- circuitpython

## Components

- **ESP32-S3** (mcu): Dual-core Xtensa LX7 240 MHz, Wi-Fi + BT5 LE, native USB, 512KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-feather-esp32-s3-8mb-wfl&source=md-export)
- **MAX17048** (power): Maxim MAX17048 fuel gauge IC for accurate LiPo battery state of charge via I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-reference-manual%2Freference-manuals%2FMAX17048-MAX17049.pdf&ref=openhardware.directory&product=adafruit-feather-esp32-s3-8mb-wfl&source=md-export)
- **NeoPixel RGB LED** (led): Onboard addressable NeoPixel with pin-controlled power. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=adafruit-feather-esp32-s3-8mb-wfl&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO35, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO3 | SDA | — | i2c-sda, digital |
| GPIO4 | SCL | — | i2c-scl, digital |
| GPIO5 | D5 | — | digital, pwm |
| GPIO6 | D6 | — | digital, pwm |
| GPIO8 | A5 | — | analog, digital |
| GPIO9 | D9 | — | digital, pwm |
| GPIO10 | D10 | — | digital, pwm |
| GPIO11 | D11 | — | digital |
| GPIO12 | D12 | — | digital |
| GPIO13 | D13 | — | digital |
| GPIO14 | A2 | — | analog, digital |
| GPIO15 | A3 | — | analog, digital |
| GPIO16 | A4 | — | analog, digital |
| GPIO17 | A0 | — | analog, digital |
| GPIO18 | A1 | — | analog, digital |
| GPIO35 | MOSI | — | spi-mosi, digital |
| GPIO36 | MISO | — | spi-miso, digital |
| GPIO37 | SCK | — | spi-sck, digital |
| GPIO43 | TX | — | uart-tx, digital |
| GPIO44 | RX | — | uart-rx, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5885&ref=openhardware.directory&product=adafruit-feather-esp32-s3-8mb-wfl&source=md-export) — 17.5

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5885&ref=openhardware.directory&product=adafruit-feather-esp32-s3-8mb-wfl&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-esp32-s3-feather&ref=openhardware.directory&product=adafruit-feather-esp32-s3-8mb-wfl&source=md-export)

## Tags

`adafruit`, `feather`, `esp32-s3`, `wfl`, `external-antenna`, `native-usb`, `lipo`, `stemma`

## Certifications

FCC, CE, RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-esp32-s3-8mb-wfl)

---

# Adafruit Matrix Portal S3

> ESP32-S3 board designed to drive HUB75 LED matrix panels directly, with built-in WiFi, BLE 5.0, native USB, STEMMA QT connector, and two user buttons — ideal for dynamic digital signage and LED art displays.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$19.95
- **CPU:** Xtensa LX7 single-core @ 240MHz (ESP32-S3)
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **USB:** USB-C (native USB OTG)
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- circuitpython
- arduino
- esp-idf

## Components


## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **UART**: TX=GPIO43, RX=GPIO44
- **HUB75**
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO3 | SDA — STEMMA QT I2C Data | — | digital-input, digital-output, pwm |
| GPIO4 | SCL — STEMMA QT I2C Clock | — | digital-input, digital-output, pwm |
| GPIO43 | TX — UART Transmit | — | digital-input, digital-output, pwm |
| GPIO44 | RX — UART Receive | — | digital-input, digital-output, pwm |
| GPIO1 | Button Up | — | digital-input |
| GPIO2 | Button Down | — | digital-input |
| GPIO6 | HUB75 R1 | — | digital-output |
| GPIO7 | HUB75 G1 | — | digital-output |
| GPIO8 | HUB75 B1 | — | digital-output |
| GPIO9 | HUB75 R2 | — | digital-output |
| GPIO10 | HUB75 G2 | — | digital-output |
| GPIO11 | HUB75 B2 | — | digital-output |
| GPIO14 | HUB75 CLK | — | digital-output |
| GPIO15 | HUB75 LAT | — | digital-output |
| GPIO16 | HUB75 OE | — | digital-output |
| GPIO17 | HUB75 A | — | digital-output |
| GPIO18 | HUB75 B | — | digital-output |
| GPIO42 | HUB75 C | — | digital-output |
| GPIO40 | HUB75 D | — | digital-output |
| GPIO41 | HUB75 E | — | digital-output |

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5778&ref=openhardware.directory&product=adafruit-matrix-portal-s3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-matrix-portal-s3&ref=openhardware.directory&product=adafruit-matrix-portal-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-MatrixPortal-S3-PCB&ref=openhardware.directory&product=adafruit-matrix-portal-s3&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/adafruit-matrix-portal-s3)

---

# LILYGO T-QT Pro

> Ultra-compact ESP32-S3 board with a 0.85-inch GC9107 IPS display (128×128), 2MB PSRAM, WiFi, BLE 5.0, and USB-C — one of the smallest ESP32-S3 development boards available.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$9.05
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C 2.0
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- esphome
- platformio

## Components

- **ESP32-S3FN4R2** (mcu): Espressif ESP32-S3FN4R2 dual-core Xtensa LX7 at 240MHz with 4MB flash, 2MB PSRAM, WiFi, BLE 5.0, and USB OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-qt-pro&source=md-export)
- **GC9107** (display-driver): GalaxyCore GC9107 TFT LCD driver for the 0.85-inch 128×128 IPS panel via 4-wire SPI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fmoononournation%2FArduino_GFX%2Ffiles%2F9628833%2FGC9107_C130-IC-1-1.pdf&ref=openhardware.directory&product=lilygo-t-qt-pro&source=md-export)

## Protocols

- **SPI**: MOSI=GPIO2, CLK=GPIO3, CS=GPIO5, DC=GPIO6
- **I2C**: SDA=GPIO43, SCL=GPIO44
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot Button | — | digital-input, strapping |
| GPIO4 | Battery Voltage ADC | — | digital-input, adc |
| GPIO1 | Free GPIO | — | digital-input, digital-output, adc, touch |
| GPIO2 | SPI MOSI | — | digital-input, digital-output, touch |
| GPIO3 | SPI CLK | — | digital-input, digital-output, touch |
| GPIO5 | SPI CS | — | digital-input, digital-output |
| GPIO6 | Display DC | — | digital-output |
| GPIO38 | Free GPIO | — | digital-input, digital-output |
| GPIO39 | Free GPIO | — | digital-input, digital-output |
| GPIO40 | Free GPIO | — | digital-input, digital-output |
| GPIO41 | Free GPIO | — | digital-input, digital-output |
| GPIO42 | Free GPIO | — | digital-input, digital-output |
| GPIO43 | UART TX / I2C SDA | — | digital-output |
| GPIO44 | UART RX / I2C SCL | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-qt-pro&ref=openhardware.directory&product=lilygo-t-qt-pro&source=md-export) — $9.05

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-qt-pro&ref=openhardware.directory&product=lilygo-t-qt-pro&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-QT&ref=openhardware.directory&product=lilygo-t-qt-pro&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-qt-pro&source=md-export)

## Tags

`esp32-s3`, `tiny`, `compact`, `lilygo`, `display`, `ips`, `ble5`, `badge`, `wearable`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-qt-pro)

---

# LILYGO T-Dongle S3

> ESP32-S3 USB-A dongle with a 0.96-inch ST7735 color display (80×160), 16MB flash, WiFi, and BLE 5.0 — a compact plug-in development stick for IoT, media, and wireless sensor nodes.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$10.99
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-A 2.0
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- esphome
- platformio

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core Xtensa LX7 at 240MHz with WiFi, BLE 5.0, and native USB OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-dongle-s3&source=md-export)
- **ST7735** (display-driver): Sitronix ST7735 TFT LCD driver for the 0.96-inch 80×160 color panel via 4-wire SPI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7735.pdf&ref=openhardware.directory&product=lilygo-t-dongle-s3&source=md-export)

## Protocols

- **SPI**: MOSI=GPIO11, CLK=GPIO12, CS=GPIO10
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot Button | — | digital-input, strapping |
| GPIO38 | Free GPIO | — | digital-input, digital-output |
| GPIO39 | Free GPIO | — | digital-input, digital-output |
| GPIO40 | Free GPIO | — | digital-input, digital-output |
| GPIO43 | UART TX | — | digital-output |
| GPIO44 | UART RX | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-dongle-s3&ref=openhardware.directory&product=lilygo-t-dongle-s3&source=md-export) — $10.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-dongle-s3&ref=openhardware.directory&product=lilygo-t-dongle-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Dongle-S3&ref=openhardware.directory&product=lilygo-t-dongle-s3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-dongle-s3&source=md-export)

## Tags

`esp32-s3`, `usb-dongle`, `display`, `lilygo`, `wifi`, `ble5`, `compact`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-dongle-s3)

---

# LILYGO T-Display Keyboard

> Compact ESP32 development board combining a physical keyboard with a 1.14" IPS display, USB-C charging, multiple interfaces, and optional 2800mAh battery in shell configuration.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$17.67
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB/16MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n 2.4 GHz | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 processor at 240 MHz with 520KB SRAM, Wi-Fi 802.11 b/g/n and Bluetooth 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-display-keyboard&source=md-export)
- **ST7789V** (display-driver): 1.14-inch IPS TFT LCD display driver with SPI interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.orientdisplay.com%2Fwp-content%2Fuploads%2F2019%2F09%2FST7789V.pdf&ref=openhardware.directory&product=lilygo-t-display-keyboard&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **I2S**
- **SDIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-keyboard&ref=openhardware.directory&product=lilygo-t-display-keyboard&source=md-export) — $17.67

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-keyboard&ref=openhardware.directory&product=lilygo-t-display-keyboard&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Display-keyboard&ref=openhardware.directory&product=lilygo-t-display-keyboard&source=md-export)

## Tags

`esp32`, `keyboard`, `display`, `ips`, `wifi`, `bluetooth`, `lilygo`, `portable`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-display-keyboard)

---

# LILYGO T-Keyboard S3 Pro

> Advanced ESP32-S3 programmable keyboard board with 4 built-in 0.85" TFT displays, 14 RGB LEDs, rotary encoder, STM32 co-processor, magnetic connectors for daisy-chaining up to 6 units.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$60.01
- **CPU:** ESP32-S3R8
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n 2.4 GHz | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3R8** (mcu): Dual-core Xtensa LX7 MCU at up to 240 MHz with 8MB PSRAM, Wi-Fi 802.11 b/g/n and Bluetooth 5 LE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-keyboard-s3-pro&source=md-export)
- **STM32G030F6P6** (mcu): STM32 ARM Cortex-M0+ co-processor with 64KB Flash and 8KB RAM for low-level keyboard I/O management — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32g030f6.pdf&ref=openhardware.directory&product=lilygo-t-keyboard-s3-pro&source=md-export)
- **GC9107** (display-driver): 0.85-inch TFT LCD display driver with 128×128 resolution, used for 4 key-cap displays — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Keyboard-S3-Pro&ref=openhardware.directory&product=lilygo-t-keyboard-s3-pro&source=md-export)
- **WS2812B** (led): 14 programmable WS2812 addressable RGB LEDs for keyboard backlighting and status indication — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812.pdf&ref=openhardware.directory&product=lilygo-t-keyboard-s3-pro&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-keyboard-s3-pro&ref=openhardware.directory&product=lilygo-t-keyboard-s3-pro&source=md-export) — $60.01

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-keyboard-s3-pro&ref=openhardware.directory&product=lilygo-t-keyboard-s3-pro&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-keyboard&ref=openhardware.directory&product=lilygo-t-keyboard-s3-pro&source=md-export)

## Tags

`esp32-s3`, `keyboard`, `display`, `rgb-leds`, `stm32`, `wifi`, `bluetooth`, `lilygo`, `macro-keyboard`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-keyboard-s3-pro)

---

# LILYGO T-Keyboard

> Compact ESP32-C3 keyboard terminal with a built-in 0.99" display, Wi-Fi, Bluetooth 4.2, 400mAh battery, and a 3D-printed shell for portable wireless input applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-C3
- **Price:** ~$18.71
- **CPU:** ESP32-C3
- **RAM:** 400KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n 2.4 GHz | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-C3** (mcu): Single-core RISC-V MCU at 160 MHz with 4MB Flash, Wi-Fi 802.11 b/g/n and Bluetooth 4.2 LE, designed for secure low-power IoT applications — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-keyboard&source=md-export)
- **GC9D01N** (display-driver): 0.99-inch TFT LCD display driver with SPI 4-line interface, 40×160 resolution — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-keyboard&ref=openhardware.directory&product=lilygo-t-keyboard&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-keyboard&ref=openhardware.directory&product=lilygo-t-keyboard&source=md-export) — $18.71

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-keyboard&ref=openhardware.directory&product=lilygo-t-keyboard&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-keyboard&ref=openhardware.directory&product=lilygo-t-keyboard&source=md-export)

## Tags

`esp32-c3`, `keyboard`, `display`, `wifi`, `bluetooth`, `battery`, `lilygo`, `portable`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-keyboard)

---

# LILYGO LoRa3 (T3 LoRa32 V1.6.1)

> LILYGO LoRa3 (T3 LoRa32 V1.6.1) is an ESP32 development board combining Wi-Fi, BLE, and LoRa radio (SX1276/SX1278) with OLED display and TF card slot for IoT and mesh networking.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$15.6
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro USB (CH9102)
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- meshtastic
- meshcore
- paxcounter

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 at 240MHz with Wi-Fi 802.11 b/g/n, Bluetooth 4.2 BLE, 520KB SRAM, 4MB flash. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-lora3&source=md-export)
- **SX1276** (radio): Semtech SX1276 LoRa transceiver for 868/915 MHz bands with -148 dBm sensitivity, 300 kbps max data rate, and automatic frequency correction. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1276-7-8-9_W_APP_V7.pdf&ref=openhardware.directory&product=lilygo-lora3&source=md-export)
- **SX1278** (radio): Semtech SX1278 LoRa transceiver for 433 MHz band with -148 dBm sensitivity and 300 kbps max data rate. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1276-7-8-9_W_APP_V7.pdf&ref=openhardware.directory&product=lilygo-lora3&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **LoRa**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Flora3&ref=openhardware.directory&product=lilygo-lora3&source=md-export) — $15.60

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Flora3&ref=openhardware.directory&product=lilygo-lora3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-LoRa-Series&ref=openhardware.directory&product=lilygo-lora3&source=md-export)

## Tags

`esp32`, `lora`, `sx1276`, `sx1278`, `meshtastic`, `oled`, `wifi`, `bluetooth`, `lilygo`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-lora3)

---

# M5Stack Atom Echo

> Ultra-compact ESP32-PICO smart speaker dev kit (24x24mm) with built-in microphone, speaker, RGB LED, button, and Grove port. Ideal for voice assistant and audio streaming projects.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$13.5
- **CPU:** Dual-core Xtensa LX6 @ 240MHz
- **Flash:** 4MB
- **USB:** Type-C
- **Power:** 5V
- **Dimensions:** 24 x 24 x 17 mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf
- uiflow
- micropython
- esphome

## Components

- **SPM1423** (PDM MEMS Microphone): High-sensitivity PDM MEMS microphone for voice capture and audio input — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2304140030_Knowles-SPM1423HM4H-B_C2684080.pdf&ref=openhardware.directory&product=m5stack-atom-echo&source=md-export)
- **NS4168** (I2S Audio Amplifier): 3W Class-D mono audio amplifier with I2S digital input, driving the built-in 0.5W speaker — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F1912111437_Nsiway-NS4168_C368283.pdf&ref=openhardware.directory&product=m5stack-atom-echo&source=md-export)
- **SK6812** (RGB LED): Individually addressable RGB LED with integrated driver for status indication and visual feedback — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F2757%2Fp2757_SK6812RGBW_REV01.pdf&ref=openhardware.directory&product=m5stack-atom-echo&source=md-export)
- **IR LED** (Infrared Transmitter): Infrared LED for transmitting IR remote control signals to consumer electronics — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.vishay.com%2Fdocs%2F81009%2Ftsal6200.pdf&ref=openhardware.directory&product=m5stack-atom-echo&source=md-export)
- **Grove Port** (GPIO/I2C Connector): 4-pin Grove connector providing GPIO and I2C interface for external sensors and actuators — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2FGrove_System%2F&ref=openhardware.directory&product=m5stack-atom-echo&source=md-export)

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stackatomecho&ref=openhardware.directory&product=m5stack-atom-echo&source=md-export)
- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fatom-echo-smart-speaker-dev-kit&ref=openhardware.directory&product=m5stack-atom-echo&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fatom-echo-smart-speaker-dev-kit&ref=openhardware.directory&product=m5stack-atom-echo&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5Atom&ref=openhardware.directory&product=m5stack-atom-echo&source=md-export)

## Tags

`esp32`, `voice-assistant`, `smart-speaker`, `m5stack`, `atom`, `esphome`, `home-assistant`, `audio`, `microphone`, `grove`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-atom-echo)

---

# Seeed XIAO ESP32S3 Plus

> Ultra-compact ESP32-S3 development board with OV2640 camera, digital microphone, 8MB PSRAM, 8MB flash, WiFi 802.11 b/g/n, BLE 5.0, extended GPIO, and battery charging — ideal for AI and IoT edge projects.

## Quick Facts

- **Brand:** Seeed Studio
- **Board Type:** dev-board
- **Price:** ~$10.99
- **CPU:** ESP32-S3
- **Flash:** 8MB
- **GPIO:** 14 pins
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- micropython
- circuitpython

## Components

- **ESP32-S3** (MCU): Espressif ESP32-S3 with Xtensa LX7 dual-core processor at 240MHz, 8MB PSRAM, WiFi and BLE 5.0 connectivity, with vector instructions for AI/ML acceleration — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=xiao-esp32s3-plus&source=md-export)
- **OV2640** (Camera): OmniVision OV2640 2-megapixel CMOS camera sensor capable of 1600x1200 resolution, connected via DVP interface for image capture and computer vision — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2Fcam_module%2FOV2640DS.pdf&ref=openhardware.directory&product=xiao-esp32s3-plus&source=md-export)
- **MSM261S4030H0R** (Audio): MEMSensing MSM261S4030H0R digital MEMS microphone with PDM output for voice recognition and audio capture applications — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2Fxiao_esp32s3_getting_started%2F&ref=openhardware.directory&product=xiao-esp32s3-plus&source=md-export)
- **JST 1.25mm** (Connector): JST SH 1.25mm pitch connector for LiPo battery with built-in charging circuit for portable and battery-powered deployments — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2Fxiao_esp32s3_getting_started%2F&ref=openhardware.directory&product=xiao-esp32s3-plus&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **GPIO**
- **ADC**
- **USB OTG**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fseeed-studio-xiao-esp32s3-plus&ref=openhardware.directory&product=xiao-esp32s3-plus&source=md-export) — $10.99
- [Seeed Studio](https://openhardware.directory/r?to=https%3A%2F%2Fwww.seeedstudio.com%2FSeeed-Studio-XIAO-ESP32S3-Plus-p-6361.html&ref=openhardware.directory&product=xiao-esp32s3-plus&source=md-export) — $10.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.seeedstudio.com%2FSeeed-Studio-XIAO-ESP32S3-Plus-p-6361.html&ref=openhardware.directory&product=xiao-esp32s3-plus&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FSeeed-Studio%2Fwiki-documents&ref=openhardware.directory&product=xiao-esp32s3-plus&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2Fxiao_esp32s3_getting_started%2F&ref=openhardware.directory&product=xiao-esp32s3-plus&source=md-export)

## Tags

`esp32-s3`, `xiao`, `camera`, `microphone`, `tinyml`, `compact`, `seeed-studio`, `ov2640`

---
[View full device page](https://openhardware.directory/s/1370/xiao-esp32s3-plus)

---

# Waveshare RoArm-M2-S

> ESP32-based 4-DOF robotic arm with 360-degree base rotation, 500g payload at 300mm reach, dual-drive shoulder joint, 9-axis IMU, and ROS 2 + LeRobot compatibility. Under 850g total weight.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** robotic-arm
- **Price:** ~$189.99
- **CPU:** ESP32-WROOM-32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Type-C
- **Power:** 12V 5A DC

## Connectivity

WiFi 2.4GHz

## Compatible Firmware

- arduino
- ros2
- esp-idf
- micropython

## Components

- **ESP32-WROOM-32** (MCU): Espressif ESP32 dual-core Xtensa LX6 microcontroller with integrated WiFi and Bluetooth — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-roarm-m2-s&source=md-export)
- **ST3215 Serial Bus Servo (x5)** (Servo): Feetech ST3215 TTL serial bus servo with 30kg.cm torque at 12V, 40rpm no-load speed, and 12-bit magnetic encoder — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.feetechrc.com%2Fst3215.html&ref=openhardware.directory&product=waveshare-roarm-m2-s&source=md-export)
- **QMI8658C** (IMU): QST QMI8658C 6-axis inertial measurement unit with 3-axis accelerometer and 3-axis gyroscope — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.qstcorp.com%2Fupload%2Fpdf%2F202301%2F13-52-25%2520QMI8658C%2520Datasheet%2520Rev%2520A.pdf&ref=openhardware.directory&product=waveshare-roarm-m2-s&source=md-export)
- **AK09918C** (Sensor): AKM AK09918C 3-axis electronic compass for orientation sensing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.akm.com%2Fcontent%2Fdam%2Fdocuments%2Fproducts%2Felectronic-compass%2Fak09918c%2Fak09918c-en-datasheet.pdf&ref=openhardware.directory&product=waveshare-roarm-m2-s&source=md-export)
- **INA219** (Power Monitor): Texas Instruments INA219 high-side current and power monitor with I2C interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fina219.pdf&ref=openhardware.directory&product=waveshare-roarm-m2-s&source=md-export)
- **TB6612FNG** (Motor Driver): Toshiba TB6612FNG dual H-bridge motor driver for DC and stepper motor control — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sparkfun.com%2Fdatasheets%2FRobotics%2FTB6612FNG.pdf&ref=openhardware.directory&product=waveshare-roarm-m2-s&source=md-export)
- **0.91-inch OLED** (Display): 0.91-inch OLED screen for real-time status and parameter display — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRoArm-M2-S&ref=openhardware.directory&product=waveshare-roarm-m2-s&source=md-export)

## Protocols

- **UART**
- **I2C**
- **HTTP/JSON**
- **ESP-NOW**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Waveshare Official](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Froarm-m2-s.htm&ref=openhardware.directory&product=waveshare-roarm-m2-s&source=md-export) — $189.99
- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwaveshare-roarm-m2-s-robotic-arm&ref=openhardware.directory&product=waveshare-roarm-m2-s&source=md-export) — $209.85

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Froarm-m2-s.htm&ref=openhardware.directory&product=waveshare-roarm-m2-s&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRoArm-M2-S&ref=openhardware.directory&product=waveshare-roarm-m2-s&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2Froarm_m2&ref=openhardware.directory&product=waveshare-roarm-m2-s&source=md-export)

## Tags

`robotic-arm`, `esp32`, `ros2`, `arduino`, `wifi`, `desktop-robot`, `servo`, `waveshare`, `imu`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-roarm-m2-s)

---

# TinkerNav RTK GNSS Board

> Open-source RTK GNSS board with SkyTraq PX1105R receiver and ESP32-S3 for centimeter-level positioning. Works as base station or rover with WiFi, Bluetooth LE, and optional LoRa connectivity.

## Quick Facts

- **Brand:** Tinkerbug Robotics
- **Board Type:** GNSS Receiver
- **Price:** ~$99
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** USB-C or JST battery (1.8V-5.5V input)

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino

## Components

- **SkyTraq PX1105R** (GNSS Receiver): GNSS receiver with integrated RTK engine for centimeter-level positioning accuracy, supporting GPS, GLONASS, Galileo, and BeiDou constellations. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.skytraq.com.tw%2Fhomesite%2FPX1105R.html&ref=openhardware.directory&product=tinkernav-rtk-gnss-board&source=md-export)
- **ESP32-S3** (MCU): Espressif ESP32-S3 dual-core Xtensa LX7 processor with integrated WiFi 802.11 b/g/n and Bluetooth 5.0 LE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=tinkernav-rtk-gnss-board&source=md-export)
- **TPS63070RNMR** (Power Management): Texas Instruments high-efficiency buck-boost converter with 2A output, providing stable 3.3V from a wide 1.8V-5.5V input range. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftps63070.pdf&ref=openhardware.directory&product=tinkernav-rtk-gnss-board&source=md-export)

## Protocols

- **UART**
- **RTCM**
- **NTRIP**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** CC-BY-SA

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Ftinkerbug%2Ftinkernav-rtk-gnss-board%2F&ref=openhardware.directory&product=tinkernav-rtk-gnss-board&source=md-export) — $99.00

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FTinkerbug-Robotics%2FTinkerNav&ref=openhardware.directory&product=tinkernav-rtk-gnss-board&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Ftinkerbug%2Ftinkernav-rtk-gnss-board%2F&ref=openhardware.directory&product=tinkernav-rtk-gnss-board&source=md-export)

## Tags

`rtk`, `gnss`, `gps`, `esp32-s3`, `skytraq`, `positioning`, `rover`, `base-station`, `lora`, `arduino`

---
[View full device page](https://openhardware.directory/s/1370/tinkernav-rtk-gnss-board)

---

# Makerfabs ESP32 UWB Pro with Display

> ESP32-WROVER development board with Decawave DWM1000 UWB module for centimeter-accurate indoor positioning and ranging, featuring a 1.3\" OLED display and LiPo battery charging.

## Quick Facts

- **Brand:** Makerfabs
- **Board Type:** dev-board
- **Price:** ~$54.8
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro-USB
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-WROVER** (mcu): Xtensa LX6 dual-core @ 240MHz with 4MB flash, 8MB PSRAM, WiFi 802.11 b/g/n and Bluetooth 4.2 + BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wrover_datasheet_en.pdf&ref=openhardware.directory&product=makerfabs-esp32-uwb-pro-with-display&source=md-export)
- **DWM1000** (uwb-transceiver): Decawave DWM1000 IEEE 802.15.4-2011 UWB module based on the DW1000 IC, supporting channels 2 and 5 with precision ranging up to 200m and 10cm accuracy. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fdatasheet%2Funit%2Fuwb%2Fdwm1000-datasheet-1.pdf&ref=openhardware.directory&product=makerfabs-esp32-uwb-pro-with-display&source=md-export)
- **SSD1306** (display-driver): Solomon Systech SSD1306 OLED driver IC controlling the 1.3-inch 128×64 monochrome OLED display via I2C interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=makerfabs-esp32-uwb-pro-with-display&source=md-export)

## Protocols

- **SPI** (VSPI): SCK=GPIO18, MISO=GPIO19, MOSI=GPIO23, CS=GPIO21
- **I2C** (I2C0): SDA=GPIO4, SCL=GPIO5

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO4 | I2C SDA (OLED) | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO5 | I2C SCL (OLED) | — | digital-input, digital-output, pwm |
| GPIO18 | SPI SCK (DWM1000) | — | digital-input, digital-output, pwm |
| GPIO19 | SPI MISO (DWM1000) | — | digital-input, digital-output, pwm |
| GPIO21 | SPI CS (DWM1000) | — | digital-input, digital-output, pwm |
| GPIO23 | SPI MOSI (DWM1000) | — | digital-input, digital-output, pwm |
| GPIO27 | UWB Reset | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO34 | UWB IRQ | — | digital-input, input-only |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fmakerfabs%2Fesp32-uwb-pro-with-display%2F&ref=openhardware.directory&product=makerfabs-esp32-uwb-pro-with-display&source=md-export) — $54.80
- [Makerfabs](https://openhardware.directory/r?to=https%3A%2F%2Fwww.makerfabs.com%2Fesp32-uwb-pro-with-display.html&ref=openhardware.directory&product=makerfabs-esp32-uwb-pro-with-display&source=md-export) — $54.80

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.makerfabs.com%2Fesp32-uwb-pro-with-display.html&ref=openhardware.directory&product=makerfabs-esp32-uwb-pro-with-display&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FMakerfabs%2FMakerfabs-ESP32-UWB&ref=openhardware.directory&product=makerfabs-esp32-uwb-pro-with-display&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.makerfabs.com%2FESP32_UWB_Pro_with_Display.html&ref=openhardware.directory&product=makerfabs-esp32-uwb-pro-with-display&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wrover_datasheet_en.pdf&ref=openhardware.directory&product=makerfabs-esp32-uwb-pro-with-display&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FMakerfabs%2FMakerfabs-ESP32-UWB%2Fblob%2Fmain%2Fhardware%2FESP32%2520UWB%2520Pro%2520with%2520Display%2520v1.2.sch&ref=openhardware.directory&product=makerfabs-esp32-uwb-pro-with-display&source=md-export)

## Tags

`esp32`, `uwb`, `ultra-wideband`, `indoor-positioning`, `dw1000`, `dwm1000`, `ranging`, `rtls`, `oled`, `makerfabs`

---
[View full device page](https://openhardware.directory/s/1370/makerfabs-esp32-uwb-pro-with-display)

---

# CircuitMess ClockStar 2.0

> DIY smartwatch kit powered by ESP32 with ST7735S display, 6-axis IMU, Bluetooth connectivity, and programmable via CircuitBlocks visual coding environment.

## Quick Facts

- **Brand:** circuitmess
- **Board Type:** diy-kit
- **Price:** ~$140
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro-USB
- **Power:** LiPo battery

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- circuitblocks
- esp-idf

## Components

- **ESP32** (mcu): Espressif ESP32 dual-core Xtensa LX6 microcontroller running at 240MHz with WiFi 802.11 b/g/n and Bluetooth 4.2 LE. 520KB SRAM, 4MB flash. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=circuitmess-clockstar-2-0&source=md-export)
- **ST7735S** (display-driver): Sitronix ST7735S TFT LCD controller driving a 128×128 pixel color display over SPI interface at 40MHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7735.pdf&ref=openhardware.directory&product=circuitmess-clockstar-2-0&source=md-export)
- **LSM6DS3TR-C** (imu): STMicroelectronics LSM6DS3TR-C 6-axis IMU providing 3D accelerometer and 3D gyroscope data over I2C. Features wrist tilt detection, tap recognition, and significant motion detection for smartwatch use. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flsm6ds3tr-c.pdf&ref=openhardware.directory&product=circuitmess-clockstar-2-0&source=md-export)

## Protocols

- **SPI** (SPI2): SCK=GPIO16, MOSI=GPIO17, DC=GPIO5, RST=GPIO18
- **I2C**: SDA=GPIO26, SCL=GPIO25

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO14 | Button DOWN | — | digital-input |
| GPIO15 | Button UP | — | digital-input |
| GPIO27 | Button SELECT | — | digital-input |
| GPIO39 | Button ALT | — | input-only |
| GPIO21 | RGB LED Red | — | digital-output, pwm |
| GPIO22 | RGB LED Green | — | digital-output, pwm |
| GPIO23 | RGB LED Blue | — | digital-output, pwm |
| GPIO4 | Backlight | — | digital-output, pwm |
| GPIO2 | Buzzer | — | digital-output, pwm |
| GPIO36 | Battery ADC | — | input-only, adc |
| GPIO19 | Charge Detect | — | digital-input |
| GPIO35 | IMU INT1 | — | input-only |
| GPIO34 | IMU INT2 | — | input-only |
| GPIO26 | I2C SDA | — | digital-input, digital-output |
| GPIO25 | I2C SCL | — | digital-input, digital-output, dac |
| GPIO16 | TFT SCK | — | digital-output |
| GPIO17 | TFT MOSI | — | digital-output |
| GPIO5 | TFT DC | — | digital-output |
| GPIO18 | TFT RST | — | digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [CircuitMess](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitmess.com%2Fproducts%2Fclockstar-2-0&ref=openhardware.directory&product=circuitmess-clockstar-2-0&source=md-export) — €129.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitmess.com%2Fproducts%2Fclockstar-2-0&ref=openhardware.directory&product=circuitmess-clockstar-2-0&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FCircuitMess%2FClockstar-Firmware&ref=openhardware.directory&product=circuitmess-clockstar-2-0&source=md-export)

## Tags

`circuitmess`, `smartwatch`, `diy-kit`, `esp32`, `stem`, `wearable`

---
[View full device page](https://openhardware.directory/s/1370/circuitmess-clockstar-2-0)

---

# Pycom FiPy

> Five-network ESP32 MicroPython board with WiFi, Bluetooth LE, LoRa, SigFox, and dual LTE-M (CAT-M1/NB1). 4MB RAM, 8MB flash, 22 GPIO. The most connected Pycom module for versatile LPWAN IoT applications.

## Quick Facts

- **Brand:** Pycom
- **Board Type:** dev-board
- **Price:** ~$94.95
- **CPU:** Espressif ESP32 dual-core Xtensa LX6
- **RAM:** 4 MB
- **Flash:** 8 MB
- **GPIO:** 22 pins
- **Power:** 3.3V-5.5V via pin headers or Pycom expansion board
- **Dimensions:** 54mm × 20mm × 9.6mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- micropython

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 at 240 MHz with integrated 802.11 b/g/n WiFi and Bluetooth 4.2/BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=pycom-fipy&source=md-export)
- **Semtech SX1276** (radio): LoRa/FSK transceiver for LoRaWAN (868/915MHz) and SigFox connectivity, Class A & C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.my.salesforce.com%2Fsfc%2Fp%2F%23E0000000JelG%2Fa%2F2R000000HSSi%2F71Zf0o7wgdTx3S7PpPOxgLDCVPAezDcnMlE4a2eZ9_k&ref=openhardware.directory&product=pycom-fipy&source=md-export)
- **Sequans Monarch** (wireless-module): LTE modem supporting CAT-M1 and NB1 across 699-2690 MHz globally. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sequans.com%2Fproducts%2Fmonarch%2F&ref=openhardware.directory&product=pycom-fipy&source=md-export)

## Protocols

- **I2C**: SDA=P9, SCL=P10
- **SPI**: MOSI=P10, MISO=P11, SCK=P12
- **UART**: TX=P1, RX=P0
- **WiFi**
- **Bluetooth**
- **LoRa**
- **LTE**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| P0 | RX | — | digital-input, digital-output |
| P1 | TX | — | digital-input, digital-output |
| P2 | GPIO | — | digital-input, digital-output |
| P3 | GPIO | — | digital-input, digital-output |
| P4 | GPIO | — | digital-input, digital-output |
| P6 | GPIO | — | digital-input, digital-output |
| P7 | GPIO | — | digital-input, digital-output |
| P8 | GPIO | — | digital-input, digital-output |
| P9 | SDA | — | digital-input, digital-output |
| P10 | SCL/MOSI | — | digital-input, digital-output |
| P11 | MISO | — | digital-input, digital-output |
| P12 | SCK | — | digital-input, digital-output |
| P13 | GPIO | — | digital-input, digital-output |
| P14 | GPIO | — | digital-input, digital-output |
| P15 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P16 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P17 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P18 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P19 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P20 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P21 | GPIO | — | digital-input, digital-output |
| P22 | GPIO | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3613&ref=openhardware.directory&product=pycom-fipy&source=md-export) — 94.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3613&ref=openhardware.directory&product=pycom-fipy&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3613&ref=openhardware.directory&product=pycom-fipy&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.pycom.io%2Fdatasheets%2Fdevelopment%2Ffipy%2F&ref=openhardware.directory&product=pycom-fipy&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fpycom%2Fpycom-micropython-sigfox&ref=openhardware.directory&product=pycom-fipy&source=md-export)

## Tags

`lora`, `sigfox`, `lte`, `cat-m1`, `nb-iot`, `esp32`, `micropython`, `wifi`, `ble`, `iot`, `pycom`, `lpwan`, `five-network`

## Certifications

FCC, CE, RoHS

---
[View full device page](https://openhardware.directory/s/1370/pycom-fipy)

---

# ESP32-S2-WROVER Module

> Bare WiFi module with Espressif ESP32-S2 single-core Xtensa LX7 @ 240MHz, 4MB Flash, 2MB PSRAM, 802.11b/g/n, native USB 1.1 OTG, and SMD pads. Intended for integration onto custom PCBs, not a standalone dev board.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** module
- **Price:** ~$5.95
- **CPU:** Xtensa LX7 single-core @ 240MHz (ESP32-S2)
- **RAM:** 320KB SRAM + 16KB RTC SRAM + 2MB PSRAM
- **Flash:** 4MB SPI Flash
- **Power:** 3.3V supply (requires external regulation)
- **Dimensions:** 18 x 31 x 3.3mm

## Connectivity

WiFi 802.11 b/g/n @ 2.4GHz (150 Mbps) | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- esp-idf
- arduino
- circuitpython

## Components

- **ESP32-S2** (mcu): Espressif ESP32-S2 single-core Xtensa LX7 @ 240MHz, 320KB SRAM, WiFi, native USB 1.1 OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F4653%2F4653_esp32-s2_datasheet_en-1773066.pdf&ref=openhardware.directory&product=esp32-s2-wrover-module&source=md-export)

## Protocols

- **SPI**: MOSI=GPIO35, MISO=GPIO37, SCK=GPIO36
- **I2C**: SDA=GPIO3, SCL=GPIO4
- **UART**: TX=GPIO43, RX=GPIO44
- **I2S**
- **USB**: D-=GPIO19, D+=GPIO20
- **ADC**
- **DAC**: DAC1=GPIO17, DAC2=GPIO18
- **Touch**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | ADC1_CH0/Touch1 | — | ADC, Touch, GPIO |
| GPIO2 | ADC1_CH1/Touch2 | — | ADC, Touch, GPIO |
| GPIO3 | ADC1_CH2/Touch3/SDA | — | I2C, ADC, Touch, GPIO |
| GPIO4 | ADC1_CH3/Touch4/SCL | — | I2C, ADC, Touch, GPIO |
| GPIO5 | ADC1_CH4/Touch5 | — | ADC, Touch, GPIO |
| GPIO6 | ADC1_CH5/Touch6 | — | ADC, Touch, GPIO |
| GPIO7 | ADC1_CH6/Touch7 | — | ADC, Touch, GPIO |
| GPIO8 | ADC1_CH7/Touch8 | — | ADC, Touch, GPIO |
| GPIO9 | ADC1_CH8/Touch9 | — | ADC, Touch, GPIO |
| GPIO10 | ADC1_CH9/Touch10 | — | ADC, Touch, GPIO |
| GPIO11 | ADC2_CH0/Touch11 | — | ADC, Touch, GPIO |
| GPIO12 | ADC2_CH1/Touch12 | — | ADC, Touch, GPIO |
| GPIO13 | ADC2_CH2/Touch13 | — | ADC, Touch, GPIO |
| GPIO14 | ADC2_CH3/Touch14 | — | ADC, Touch, GPIO |
| GPIO19 | USB_D- | — | USB, GPIO |
| GPIO20 | USB_D+ | — | USB, GPIO |
| GPIO35 | MOSI | — | SPI, GPIO |
| GPIO36 | SCK | — | SPI, GPIO |
| GPIO37 | MISO | — | SPI, GPIO |
| GPIO38 | GPIO/DAC1 | — | DAC, GPIO |
| GPIO43 | TX | — | UART, GPIO |
| GPIO44 | RX | — | UART, GPIO |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4653&ref=openhardware.directory&product=esp32-s2-wrover-module&source=md-export) — 5.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4653&ref=openhardware.directory&product=esp32-s2-wrover-module&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4653&ref=openhardware.directory&product=esp32-s2-wrover-module&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F4653%2F4653_esp32-s2_datasheet_en-1773066.pdf&ref=openhardware.directory&product=esp32-s2-wrover-module&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-idf&ref=openhardware.directory&product=esp32-s2-wrover-module&source=md-export)

## Tags

`esp32-s2`, `module`, `wifi`, `espressif`, `psram`, `wrover`, `usb-otg`, `bare-module`

## Certifications

RoHS, FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/esp32-s2-wrover-module)

---

# ESP32-S2-WROVER-I Module with uFL

> Bare WiFi module with ESP32-S2 Xtensa LX7 @ 240MHz, 4MB Flash, 2MB PSRAM, 802.11b/g/n, native USB OTG, and a uFL connector for an external antenna. Drop-in variant of the WROVER for improved RF range.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** module
- **Price:** ~$3.95
- **CPU:** Xtensa LX7 single-core @ 240MHz (ESP32-S2)
- **RAM:** 320KB SRAM + 16KB RTC SRAM + 2MB PSRAM
- **Flash:** 4MB SPI Flash
- **Power:** 3.3V supply (requires external regulation)
- **Dimensions:** 18 x 31 x 3.3mm

## Connectivity

WiFi 802.11 b/g/n @ 2.4GHz (150 Mbps) | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- esp-idf
- arduino
- circuitpython

## Components

- **ESP32-S2** (mcu): Espressif ESP32-S2 single-core Xtensa LX7 @ 240MHz, 320KB SRAM, WiFi, native USB 1.1 OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F4760%2F4760_esp32-s2-wrover_esp32-s2-wrover-i_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s2-wrover-i-module-with-ufl&source=md-export)

## Protocols

- **SPI**: MOSI=GPIO35, MISO=GPIO37, SCK=GPIO36
- **I2C**: SDA=GPIO3, SCL=GPIO4
- **UART**: TX=GPIO43, RX=GPIO44
- **I2S**
- **USB**: D-=GPIO19, D+=GPIO20
- **ADC**
- **DAC**: DAC1=GPIO17, DAC2=GPIO18
- **Touch**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | ADC1_CH0/Touch1 | — | ADC, Touch, GPIO |
| GPIO2 | ADC1_CH1/Touch2 | — | ADC, Touch, GPIO |
| GPIO3 | ADC1_CH2/Touch3/SDA | — | I2C, ADC, Touch, GPIO |
| GPIO4 | ADC1_CH3/Touch4/SCL | — | I2C, ADC, Touch, GPIO |
| GPIO5 | ADC1_CH4/Touch5 | — | ADC, Touch, GPIO |
| GPIO6 | ADC1_CH5/Touch6 | — | ADC, Touch, GPIO |
| GPIO7 | ADC1_CH6/Touch7 | — | ADC, Touch, GPIO |
| GPIO8 | ADC1_CH7/Touch8 | — | ADC, Touch, GPIO |
| GPIO9 | ADC1_CH8/Touch9 | — | ADC, Touch, GPIO |
| GPIO10 | ADC1_CH9/Touch10 | — | ADC, Touch, GPIO |
| GPIO17 | DAC1 | — | DAC, ADC, GPIO |
| GPIO18 | DAC2 | — | DAC, ADC, GPIO |
| GPIO19 | USB_D- | — | USB, GPIO |
| GPIO20 | USB_D+ | — | USB, GPIO |
| GPIO35 | MOSI | — | SPI, GPIO |
| GPIO36 | SCK | — | SPI, GPIO |
| GPIO37 | MISO | — | SPI, GPIO |
| GPIO43 | TX | — | UART, GPIO |
| GPIO44 | RX | — | UART, GPIO |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4760&ref=openhardware.directory&product=esp32-s2-wrover-i-module-with-ufl&source=md-export) — 3.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4760&ref=openhardware.directory&product=esp32-s2-wrover-i-module-with-ufl&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4760&ref=openhardware.directory&product=esp32-s2-wrover-i-module-with-ufl&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F4760%2F4760_esp32-s2-wrover_esp32-s2-wrover-i_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s2-wrover-i-module-with-ufl&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-idf&ref=openhardware.directory&product=esp32-s2-wrover-i-module-with-ufl&source=md-export)

## Tags

`esp32-s2`, `module`, `wifi`, `espressif`, `psram`, `ufl-antenna`, `external-antenna`, `bare-module`

## Certifications

RoHS, FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/esp32-s2-wrover-i-module-with-ufl)

---

# Adafruit QT Py ESP32-S2 with uFL Antenna

> QT Py-sized ESP32-S2 dev board with a uFL connector for an external 2.4 GHz antenna, 4 MB flash, 2 MB PSRAM, native USB-C, STEMMA QT, and 13 GPIO — for improved WiFi range.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$12.5
- **CPU:** Xtensa LX7 single-core @ 240 MHz (ESP32-S2)
- **RAM:** 320 KB SRAM + 2 MB PSRAM
- **Flash:** 4MB
- **Power:** 5V
- **Dimensions:** 21.8 × 17.9 × 5.7 mm

## Connectivity

WiFi 2.4GHz 802.11 b/g/n

## Compatible Firmware

- circuitpython
- arduino
- esp-idf

## Components

- **ESP32-S2** (mcu): Espressif ESP32-S2 single-core 240 MHz Xtensa LX7 with native USB OTG, 2.4 GHz WiFi, and 10-channel 12-bit ADC. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-qt-py-esp32-s2-ufl&source=md-export)

## Protocols

- **I2C**: SDA=GPIO5, SCL=GPIO6
- **I2C (STEMMA QT)**: SDA=GPIO5, SCL=GPIO6
- **SPI**: MOSI=GPIO35, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO17 | A0 | — | ADC, touch |
| GPIO18 | A1 | — | ADC, touch |
| GPIO14 | A2 | — | ADC, touch |
| GPIO15 | A3 | — | ADC, touch |
| GPIO5 | SDA (STEMMA QT) | — | I2C, STEMMA QT, touch |
| GPIO6 | SCL (STEMMA QT) | — | I2C, STEMMA QT, touch |
| GPIO35 | MOSI | — | SPI |
| GPIO36 | MISO | — | SPI |
| GPIO37 | SCK | — | SPI |
| GPIO43 | TX | — | UART |
| GPIO44 | RX | — | UART |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5348&ref=openhardware.directory&product=adafruit-qt-py-esp32-s2-ufl&source=md-export) — 12.5

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_qtpy_esp32s2%2F&ref=openhardware.directory&product=adafruit-qt-py-esp32-s2-ufl&source=md-export)
- [Arduino ESP32](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Farduino-esp32&ref=openhardware.directory&product=adafruit-qt-py-esp32-s2-ufl&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5348&ref=openhardware.directory&product=adafruit-qt-py-esp32-s2-ufl&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-QT-Py-ESP32-S2-PCB&ref=openhardware.directory&product=adafruit-qt-py-esp32-s2-ufl&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-qt-py-esp32-s2&ref=openhardware.directory&product=adafruit-qt-py-esp32-s2-ufl&source=md-export)

## Tags

`esp32-s2`, `qt-py`, `ufl-antenna`, `stemma-qt`, `circuitpython`, `native-usb`, `wifi`, `tiny`, `xiao-compatible`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-qt-py-esp32-s2-ufl)

---

# Adafruit PyPortal

> The Adafruit PyPortal is an all-in-one CircuitPython WiFi IoT display board featuring an ATSAMD51J20 Cortex-M4F, ESP32 WiFi coprocessor, 3.2" 320×240 color touchscreen, built-in speaker, NeoPixel, microSD, and temperature sensor — ready for internet-connected dashboards out of the box.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$69.95
- **CPU:** ATSAMD51J20 ARM Cortex-M4F @ 120MHz
- **RAM:** 256 KB
- **Flash:** 8 MB
- **Power:** 5V via Micro-USB

## Connectivity

WiFi 802.11 b/g/n (via ESP32 coprocessor, TLS/SSL)

## Compatible Firmware

- circuitpython
- arduino

## Components

- **ATSAMD51J20** (mcu): Microchip ATSAMD51J20 ARM Cortex-M4F at 120MHz with FPU, 256KB RAM, 1MB internal flash — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM-D5x-E5x-Family-Data-Sheet-DS60001507G.pdf&ref=openhardware.directory&product=adafruit-pyportal&source=md-export)
- **ESP32 (WiFi coprocessor)** (wifi-module): Espressif ESP32 used as a dedicated WiFi coprocessor providing 802.11 b/g/n with TLS/SSL support via SPI — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-pyportal&source=md-export)
- **ADT7410** (sensor): Analog Devices ADT7410 high-accuracy 16-bit I2C temperature sensor (±0.5°C accuracy) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FADT7410.pdf&ref=openhardware.directory&product=adafruit-pyportal&source=md-export)

## Protocols

- **I2C**: SDA=SDA, SCL=SCL
- **SPI**
- **UART**
- **ADC**
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D3 | D3 | — | GPIO, Analog, Digital |
| D4 | D4 | — | GPIO, Analog, Digital |
| SDA | SDA | — | I2C SDA, STEMMA QT |
| SCL | SCL | — | I2C SCL, STEMMA QT |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4061&ref=openhardware.directory&product=adafruit-pyportal&source=md-export) — $69.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4061&ref=openhardware.directory&product=adafruit-pyportal&source=md-export)
- [docs](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-pyportal&ref=openhardware.directory&product=adafruit-pyportal&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_PyPortal&ref=openhardware.directory&product=adafruit-pyportal&source=md-export)

## Tags

`adafruit`, `pyportal`, `circuitpython`, `wifi`, `touchscreen`, `iot-display`, `samd51`, `esp32`, `smart-home`

## Certifications

FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/adafruit-pyportal)

---

# Heltec HT-HC32 Wi-Fi HaLow Camera

> ESP32-S3 development board with integrated camera and Wi-Fi HaLow (802.11ah) module for long-range wireless video transmission up to 1-2km at speeds up to 32 Mbps. Features USB-C, SD card slot, and LiPo battery charging.

## Quick Facts

- **Brand:** Heltec
- **Board Type:** dev-board
- **Price:** ~$22.9
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM,8MB PSRAM
- **Flash:** 16 MB
- **USB:** USB-C
- **Power:** USB-C 5V,LiPo 2.7-4.2V
- **Dimensions:** 60.00 x 33.50 x 7.10 mm

## Connectivity

WiFi 802.11 b/g/n + 802.11ah (HaLow) | Bluetooth true

## Compatible Firmware

- arduino

## Components

- **ESP32-S3R8** (mcu): Dual-core Xtensa LX7 microcontroller at 240 MHz with WiFi, Bluetooth, 512KB SRAM, and 8MB PSRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-ht-hc32&source=md-export)
- **HT-HC01** (radio): IEEE 802.11ah Wi-Fi HaLow module for long-range sub-GHz wireless communication up to 32 Mbps — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-HC01%2FDatasheet%2FHT-HC01.pdf&ref=openhardware.directory&product=heltec-ht-hc32&source=md-export)
- **CP2102** (interface): USB-to-UART bridge for serial programming and debugging — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=heltec-ht-hc32&source=md-export)

## Protocols

- **UART**
- **I2C**
- **SPI**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Heltec Official](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-hc32%2F&ref=openhardware.directory&product=heltec-ht-hc32&source=md-export) — $22.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-hc32%2F&ref=openhardware.directory&product=heltec-ht-hc32&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FESP_HaLow&ref=openhardware.directory&product=heltec-ht-hc32&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-HC01%2FDatasheet%2FHT-HC01.pdf&ref=openhardware.directory&product=heltec-ht-hc32&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-HC01%2FSchematic_diagram&ref=openhardware.directory&product=heltec-ht-hc32&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fwifi-halow%2Fht-hc01%2F&ref=openhardware.directory&product=heltec-ht-hc32&source=md-export)

## Tags

`esp32-s3`, `wifi-halow`, `802.11ah`, `camera`, `heltec`, `iot`, `long-range`, `wifi`

---
[View full device page](https://openhardware.directory/s/1370/heltec-ht-hc32)

---

# Heltec Vision Master E213

> ESP32-S3 development board with 2.13-inch E-Paper display and optional SX1262 LoRa radio, supporting Meshtastic, LoRaWAN, Arduino, and MicroPython. Features WiFi, BLE 5.0, ultra-low 20uA deep sleep, lithium battery management, and dual SH2.0 sensor ports.

## Quick Facts

- **Brand:** Heltec Automation
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C (native USB CDC)
- **Power:** 5V via USB-C,3.7V LiPo
- **Dimensions:** 66.75 × 30.41 × 10mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-S3R8** (mcu): Espressif ESP32-S3R8 with dual-core Xtensa LX7 processor at 240MHz, 512KB SRAM, integrated 8MB PSRAM, WiFi 802.11 b/g/n, Bluetooth 5.0 LE, hardware crypto acceleration (AES/SHA/RSA), and 16KB RTC SRAM for deep sleep retention. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-vision-master-e213&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver supporting 433/868/915MHz frequency bands with +21dBm TX power and -136dBm RX sensitivity at SF12/BW125kHz. Integrated via Heltec HT-RA62 module. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=heltec-vision-master-e213&source=md-export)
- **LCMEN2R13EFC1** (e-paper-display): 2.13-inch black-and-white E-Ink display with 250x122 pixel resolution, supporting partial refresh and 180-day image retention without power. Connected via SPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-VME213%2FLCMEN2R13EFC1.pdf&ref=openhardware.directory&product=heltec-vision-master-e213&source=md-export)

## Protocols

- **SPI (LoRa)** (SPI0): SCK=GPIO9, MOSI=GPIO10, MISO=GPIO11, CS=GPIO8
- **SPI (E-Paper)** (SPI1): CLK=GPIO4, SDI=GPIO6, CS=GPIO5, DC=GPIO2, RST=GPIO3, BUSY=GPIO1
- **I2C**: SDA=GPIO39, SCL=GPIO38
- **UART**: TX=GPIO43, RX=GPIO44
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | E-Paper BUSY / ADC1_CH0 / Touch1 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO2 | E-Paper DC / ADC1_CH1 / Touch2 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO3 | E-Paper RST / ADC1_CH2 / Touch3 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO4 | E-Paper CLK / ADC1_CH3 / Touch4 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO5 | E-Paper CS / ADC1_CH4 / Touch5 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO6 | E-Paper SDI / ADC1_CH5 / Touch6 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO7 | ADC2_CH6 | — | digital-input, digital-output, adc, pwm |
| GPIO8 | LoRa NSS | — | digital-input, digital-output, pwm |
| GPIO9 | LoRa SCK | — | digital-input, digital-output, pwm |
| GPIO10 | LoRa MOSI | — | digital-input, digital-output, pwm |
| GPIO11 | LoRa MISO | — | digital-input, digital-output, pwm |
| GPIO12 | LoRa RST | — | digital-input, digital-output, pwm |
| GPIO13 | LoRa BUSY | — | digital-input, digital-output, pwm |
| GPIO14 | LoRa DIO1 / IRQ | — | digital-input, digital-output, pwm |
| GPIO15 | ADC2_CH4 | — | digital-input, digital-output, adc, pwm |
| GPIO16 | ADC2_CH5 | — | digital-input, digital-output, adc, pwm |
| GPIO17 | ADC2_CH6 | — | digital-input, digital-output, adc, pwm |
| GPIO18 | Vext Control | — | digital-input, digital-output, pwm |
| GPIO19 | USB D- (native) | — | digital-input, digital-output |
| GPIO20 | USB D+ (native) | — | digital-input, digital-output |
| GPIO21 | User Button (PRG) | — | digital-input, digital-output, pwm |
| GPIO38 | I2C SCL | — | digital-input, digital-output, pwm |
| GPIO39 | I2C SDA | — | digital-input, digital-output, pwm |
| GPIO40 | General Purpose | — | digital-input, digital-output, pwm |
| GPIO41 | General Purpose | — | digital-input, digital-output, pwm |
| GPIO42 | General Purpose | — | digital-input, digital-output, pwm |
| GPIO43 | UART TX | — | digital-input, digital-output, pwm |
| GPIO44 | UART RX | — | digital-input, digital-output, pwm |
| GPIO45 | General Purpose (Strapping) | — | digital-input, digital-output, pwm, strapping |
| GPIO46 | General Purpose (Strapping) | — | digital-input, digital-output, pwm, strapping |

## Where to Buy

- [Heltec Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fvision-master-e213%2F&ref=openhardware.directory&product=heltec-vision-master-e213&source=md-export) — $18.90
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FESP32-S3R8-Development-Compatible-Meshtastic-IoT%25EF%25BC%2588902-928MHz%2Fdp%2FB0D9JTHTYP&ref=openhardware.directory&product=heltec-vision-master-e213&source=md-export) — $20.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fvision-master-e213%2F&ref=openhardware.directory&product=heltec-vision-master-e213&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHeltec-Aaron-Lee%2FWiFi_Kit_series&ref=openhardware.directory&product=heltec-vision-master-e213&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fesp32-series%2Fvision-master%2Fvison-master-e213%2F&ref=openhardware.directory&product=heltec-vision-master-e213&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-VME213%2FHT-VME213%2520Datasheet.pdf&ref=openhardware.directory&product=heltec-vision-master-e213&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-VME213%2FHT-VME213_Schematic_Diagram_V1.0.pdf&ref=openhardware.directory&product=heltec-vision-master-e213&source=md-export)

## Tags

`esp32-s3`, `e-paper`, `e-ink`, `lora`, `sx1262`, `meshtastic`, `lorawan`, `ble`, `wifi`, `low-power`, `iot`, `heltec`

---
[View full device page](https://openhardware.directory/s/1370/heltec-vision-master-e213)

---

# LILYGO T-Glass

> Wearable ESP32-S3 development board with 1.1" full-color AMOLED display in a glasses prism form factor, microphone, RTC, and touch button for head-up display applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$54.63
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- micropython

## Components

- **ESP32-S3FN4R2** (mcu): Xtensa LX7 dual-core at 240MHz with 4MB flash, 2MB PSRAM, WiFi, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-glass&source=md-export)
- **JD9613** (display-driver): LTPS full-color AMOLED driver for small wearable displays with 294×126 resolution. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Glass&ref=openhardware.directory&product=lilygo-t-glass&source=md-export)

## Protocols

- **SPI**: CLK=GPIO3, MOSI=GPIO1, CS=GPIO2
- **I2C**: SDA=GPIO8, SCL=GPIO9

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO8 | I2C SDA | — | digital-input, digital-output |
| GPIO9 | I2C SCL | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-glass&ref=openhardware.directory&product=lilygo-t-glass&source=md-export) — $54.63

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-glass&ref=openhardware.directory&product=lilygo-t-glass&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Glass&ref=openhardware.directory&product=lilygo-t-glass&source=md-export)

## Tags

`esp32-s3`, `amoled`, `wearable`, `ar`, `hud`, `glasses`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-glass)

---

# LILYGO T-TWR Plus

> Enhanced ESP32-S3 two-way radio board with SA868 UHF/VHF module, L76K GNSS, 1.3" OLED, AXP2102 PMIC, WS2812 RGB LED, TF card, and PPT button for APRS and walkie-talkie applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$51.74
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + Li-Ion 18650

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3-WROOM-1-N16R8** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-twr-plus&source=md-export)
- **SA868** (vhf-uhf-radio): Analog FM voice transceiver covering UHF (400–480 MHz) or VHF (134–174 MHz) bands. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-TWR&ref=openhardware.directory&product=lilygo-t-twr-plus&source=md-export)
- **SH1106** (display-driver): I2C OLED driver for 128×64 monochrome display. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.velleman.eu%2Fdownloads%2F29%2Flcd%2Fsh1106_datasheet.pdf&ref=openhardware.directory&product=lilygo-t-twr-plus&source=md-export)
- **L76K** (gps): Multi-constellation GNSS supporting GPS, BeiDou, GLONASS with 1PPS output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.quectel.com%2FUploadImage%2FAndrd%2FQuectel_L76K_GNSS_Specification_V1.0.pdf&ref=openhardware.directory&product=lilygo-t-twr-plus&source=md-export)
- **AXP2102** (battery-charger): LiPo charging PMIC with multi-channel LDO outputs and power path management. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-TWR&ref=openhardware.directory&product=lilygo-t-twr-plus&source=md-export)

## Protocols

- **I2C**: SDA=GPIO8, SCL=GPIO9
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO8 | I2C SDA | — | digital-input, digital-output |
| GPIO9 | I2C SCL | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-twr-plus&ref=openhardware.directory&product=lilygo-t-twr-plus&source=md-export) — $51.74

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-twr-plus&ref=openhardware.directory&product=lilygo-t-twr-plus&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-TWR&ref=openhardware.directory&product=lilygo-t-twr-plus&source=md-export)

## Tags

`esp32-s3`, `walkie-talkie`, `sa868`, `uhf`, `vhf`, `aprs`, `gps`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-twr-plus)

---

# LILYGO T5 2.13inch E-Paper

> LILYGO T5 2.13inch E-Paper is an ESP32-D0WDQ6 V3 development board with a 2.13-inch 212×104 e-ink display supporting 4-level grayscale, 4MB flash, TF card slot, and battery management with 4 user buttons.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$16.02
- **CPU:** Xtensa LX6 dual-core @ 240MHz
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro-USB
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- platformio
- esphome

## Components

- **ESP32-D0WDQ6-V3** (mcu): Espressif ESP32-D0WDQ6 V3 dual-core Xtensa LX6 MCU with integrated WiFi 802.11 b/g/n and Bluetooth 4.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t5-2-13inch-e-paper&source=md-export)
- **CH9102F** (usb-serial): WCH CH9102F USB to serial bridge chip for programming and serial monitoring of the ESP32. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fdownloads%2FCH9102DS1_PDF.html&ref=openhardware.directory&product=lilygo-t5-2-13inch-e-paper&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft5-2-13inch-e-paper&ref=openhardware.directory&product=lilygo-t5-2-13inch-e-paper&source=md-export) — $16.02

## Available Software

- [GxEPD2](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FZinggJM%2FGxEPD2&ref=openhardware.directory&product=lilygo-t5-2-13inch-e-paper&source=md-export)
- [LilyGo-T5-Epaper-Series](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T5-Epaper-Series&ref=openhardware.directory&product=lilygo-t5-2-13inch-e-paper&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft5-2-13inch-e-paper&ref=openhardware.directory&product=lilygo-t5-2-13inch-e-paper&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T5-Epaper-Series&ref=openhardware.directory&product=lilygo-t5-2-13inch-e-paper&source=md-export)

## Tags

`e-paper`, `e-ink`, `esp32`, `2.13-inch`, `grayscale`, `battery`, `tf-card`, `micropython`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t5-2-13inch-e-paper)

---

# LILYGO TO-ESP8266 OLED SH1106

> ESP8266 development board with 1.3-inch SH1106 OLED display, 8 digital I/O pins, CH9102 USB-serial, 3.3V operation, WiFi 802.11 b/g/n, and JST 1.25mm LiPo connector — supports ESPHome and Tasmota firmware.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP8266
- **Price:** ~$9.56
- **CPU:** ESP8266
- **RAM:** 160KB
- **Flash:** 4MB
- **GPIO:** 8 pins
- **USB:** Micro-USB (CH9102)
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n

## Compatible Firmware

- arduino
- platformio
- esphome

## Components

- **ESP8266** (mcu): Single-core Tensilica L106 at 80/160MHz with 160KB RAM and integrated WiFi 802.11 b/g/n. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2F0a-esp8266ex_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-to-esp8266-oled-sh1106&source=md-export)
- **SH1106** (display): 1.3-inch monochrome OLED at 128×64 resolution via I2C interface (SDA D1, SCL D2). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FSH1106.pdf&ref=openhardware.directory&product=lilygo-to-esp8266-oled-sh1106&source=md-export)
- **CH9102** (usb-serial): CH9102 USB to UART bridge for flashing and serial communication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH9102.html&ref=openhardware.directory&product=lilygo-to-esp8266-oled-sh1106&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Fto-esp8266-oled-sh1106&ref=openhardware.directory&product=lilygo-to-esp8266-oled-sh1106&source=md-export) — $9.56

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Fto-esp8266-oled-sh1106&ref=openhardware.directory&product=lilygo-to-esp8266-oled-sh1106&source=md-export)

## Tags

`esp8266`, `oled`, `sh1106`, `development-board`, `iot`, `esphome`, `tasmota`, `wifi`, `arduino`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-to-esp8266-oled-sh1106)

---

# Open AIR Mini

> Open-source ESP32-based ventilation controller for Ducobox Silent/Focus and Orcon MVS-15xx systems with optional CO2, humidity, VOC, and NOx sensors, fully compatible with ESPHome and Home Assistant.

## Quick Facts

- **Brand:** TheFlamingo
- **Board Type:** IoT Controller
- **Price:** ~$69.95
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro-USB (programming)
- **Power:** 230V AC

## Connectivity

WiFi WiFi 4 (802.11 b/g/n) | Bluetooth BLE 4.2

## Compatible Firmware

- esphome

## Components

- **ESP32-WROOM-32** (mcu): Espressif ESP32-WROOM-32 dual-core Xtensa LX6 module with 4MB flash, WiFi, and Bluetooth in a shielded package. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=open-air-mini&source=md-export)
- **Meanwell-AC-DC** (power-management): Onboard AC-DC converter providing 5V, 3.3V, and 10V regulated rails from 230VAC mains input. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.meanwell.com%2FproductPdf.aspx%3Fi%3D459&ref=openhardware.directory&product=open-air-mini&source=md-export)
- **SCD-4x** (environmental-sensor): Miniaturized photoacoustic NDIR CO2 sensor with integrated temperature and humidity measurement via I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsensirion.com%2Fmedia%2Fdocuments%2F48C4B7FB%2F66E05452%2FCD_DS_SCD4x_Datasheet_D1.pdf&ref=openhardware.directory&product=open-air-mini&source=md-export)
- **SHT-4x** (environmental-sensor): Fourth-generation digital temperature and humidity sensor with I2C interface and high accuracy. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsensirion.com%2Fmedia%2Fdocuments%2F33FD6951%2F662A593A%2FHT_DS_Datasheet_SHT4x.pdf&ref=openhardware.directory&product=open-air-mini&source=md-export)
- **SGP-41** (environmental-sensor): Digital VOC and NOx gas sensor with I2C interface for indoor air quality index measurement. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsensirion.com%2Fmedia%2Fdocuments%2F5FE8673C%2F61E96F50%2FSensirion_Gas_Sensors_Datasheet_SGP41.pdf&ref=openhardware.directory&product=open-air-mini&source=md-export)
- **Senseair-S8** (environmental-sensor): NDIR CO2 sensor module with UART interface, measuring 400-2000ppm for indoor air quality applications. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsenseair.com%2Fwp-content%2Fuploads%2F2024%2F07%2FPSP126.pdf&ref=openhardware.directory&product=open-air-mini&source=md-export)

## Protocols

- **I2C**
- **UART**
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO33 | Status LED | — | — |
| GPIO15 | PWM Motor Output | — | — |
| GPIO14 | RPM Pulse Counter Input | — | — |
| GPIO13 | UART Sensor 2 RX | — | — |
| GPIO12 | UART Sensor 2 TX | — | — |
| GPIO25 | UART Sensor 1 RX | — | — |
| GPIO26 | UART Sensor 1 TX | — | — |
| GPIO19 | I2C Sensor 2 SDA | — | — |
| GPIO18 | I2C Sensor 2 SCL | — | — |
| GPIO16 | I2C Sensor 1 SDA | — | — |
| GPIO4 | I2C Sensor 1 SCL | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** GPL-3.0

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Ftheflamingo%2Fopen-air-mini%2F&ref=openhardware.directory&product=open-air-mini&source=md-export) — $69.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Ftheflamingo%2Fopen-air-mini%2F&ref=openhardware.directory&product=open-air-mini&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FFlamingo-tech%2FOpen-AIR&ref=openhardware.directory&product=open-air-mini&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FFlamingo-tech%2FOpen-AIR%2Ftree%2Fmain%2FOpen%2520AIR%2520Mini%2FHardware%2FOpen%2520AIR%2520Mini%2520V1.5&ref=openhardware.directory&product=open-air-mini&source=md-export)

## Tags

`ventilation`, `hvac`, `esphome`, `home-assistant`, `esp32`, `open-source`, `air-quality`, `co2-sensor`, `smart-home`, `ducobox`, `orcon`

---
[View full device page](https://openhardware.directory/s/1370/open-air-mini)

---

# Waveshare UGV Rover

> Open-source 6-wheel 4WD AI robot platform with dual-controller architecture (ESP32 + Raspberry Pi), computer vision, pan-tilt camera, ESP-NOW communication, and ROS2 support for robotics education and autonomous navigation.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** robot-platform
- **Price:** ~$244.99
- **CPU:** ESP32-WROOM-32 + Raspberry Pi 4B/5
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **GPIO:** 40-pin RPi header + ESP32 GPIOs pins
- **USB:** USB-C (CP2102)
- **Power:** 7-13V DC / 3S 18650 Li-ion
- **Dimensions:** 230.42 x 252.40 x 254.53mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf
- micropython
- ros2

## Components

- **ESP32-WROOM-32** (mcu): Dual-core WiFi & BT sub-controller for motion and sensor processing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-ugv-rover&source=md-export)
- **TB6612FNG** (motor-driver): Dual H-bridge MOSFET motor driver, 1.2A continuous per channel — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sparkfun.com%2Fdatasheets%2FRobotics%2FTB6612FNG.pdf&ref=openhardware.directory&product=waveshare-ugv-rover&source=md-export)
- **QMI8658C** (imu): 6-axis IMU (accelerometer + gyroscope) for motion sensing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fqstcorp.com%2Fupload%2Fpdf%2F202202%2FQMI8658C%2520datasheet%2520rev%25200.9.pdf&ref=openhardware.directory&product=waveshare-ugv-rover&source=md-export)
- **AK09918C** (magnetometer): 3-axis electronic compass for heading detection — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.akm.com%2Fcontent%2Fdam%2Fdocuments%2Fproducts%2Felectronic-compass%2Fak09918c%2Fak09918c-en-datasheet.pdf&ref=openhardware.directory&product=waveshare-ugv-rover&source=md-export)
- **INA219** (current-sensor): I2C voltage/current/power monitor for battery management — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fina219.pdf&ref=openhardware.directory&product=waveshare-ugv-rover&source=md-export)
- **CP2102** (usb-uart): USB-to-UART bridge for programming (x2 on board) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=waveshare-ugv-rover&source=md-export)
- **SSD1306** (display-driver): 0.96" 128x64 OLED display controller for status monitoring — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=waveshare-ugv-rover&source=md-export)
- **ST3215** (servo): Serial bus servo for pan-tilt, 30 kg.cm torque — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FST3215_Servo&ref=openhardware.directory&product=waveshare-ugv-rover&source=md-export)
- **5MP Wide-Angle Camera** (camera): 5MP ultra-wide-angle camera with 160 degree FOV for computer vision — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FUGV-Rover&ref=openhardware.directory&product=waveshare-ugv-rover&source=md-export)

## Protocols

- **I2C**
- **UART**
- **SPI**
- **PWM**
- **ESP-NOW**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO4 | LED/PWM output | — | — |
| GPIO5 | LED/PWM output | — | — |
| GPIO16 | Encoder B input (BENCA) | — | — |
| GPIO17 | Motor A direction (AIN2) | — | — |
| GPIO18 | Servo UART RXD | — | — |
| GPIO19 | Servo UART TXD | — | — |
| GPIO21 | Motor A direction (AIN1) | — | — |
| GPIO22 | Motor B direction (BIN1) | — | — |
| GPIO23 | Motor B direction (BIN2) | — | — |
| GPIO25 | Motor A PWM (PWMA) | — | — |
| GPIO26 | Motor B PWM (PWMB) | — | — |
| GPIO27 | Encoder B input (BENCB) | — | — |
| GPIO32 | I2C SDA | — | — |
| GPIO33 | I2C SCL | — | — |
| GPIO34 | Encoder A input (AENCB, input-only) | — | — |
| GPIO35 | Encoder A input (AENCA, input-only) | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fugv-rover.htm&ref=openhardware.directory&product=waveshare-ugv-rover&source=md-export) — $244.99

## Available Software

- [ugv_base_general](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2Fugv_base_general&ref=openhardware.directory&product=waveshare-ugv-rover&source=md-export)
- [ugv_rpi](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2Fugv_rpi&ref=openhardware.directory&product=waveshare-ugv-rover&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fugv-rover.htm&ref=openhardware.directory&product=waveshare-ugv-rover&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2Fugv_base_general&ref=openhardware.directory&product=waveshare-ugv-rover&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FUGV-Rover&ref=openhardware.directory&product=waveshare-ugv-rover&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fw%2Fupload%2F3%2F37%2FGeneral_Driver_for_Robots.pdf&ref=openhardware.directory&product=waveshare-ugv-rover&source=md-export)

## Tags

`robotics`, `rover`, `ai-robot`, `esp32`, `raspberry-pi`, `ros2`, `computer-vision`, `4wd`, `open-source`, `stem`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-ugv-rover)

---

# Waveshare WAVE ROVER

> Flexible 4WD mobile robot chassis with all-metal body, ESP32 controller, 0.91\" OLED, 9-axis IMU, 3S UPS power system, and open-source firmware. Supports Raspberry Pi and Jetson Nano as host computers.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** robot-platform
- **Price:** ~$89.99
- **CPU:** ESP32-WROOM-32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C (CP2102)
- **Power:** 3S 18650 Li-ion / 12.6V 2A charger
- **Dimensions:** 194 x 168 x 100mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf
- micropython

## Components

- **ESP32-WROOM-32** (mcu): Dual-core WiFi & Bluetooth sub-controller for motion and sensor processing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-wave-rover&source=md-export)
- **TB6612FNG** (motor-driver): Dual H-bridge MOSFET motor driver for 4 N20 geared motors — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sparkfun.com%2Fdatasheets%2FRobotics%2FTB6612FNG.pdf&ref=openhardware.directory&product=waveshare-wave-rover&source=md-export)
- **QMI8658C** (imu): 6-axis IMU (accelerometer + gyroscope) for motion sensing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fqstcorp.com%2Fupload%2Fpdf%2F202202%2FQMI8658C%2520datasheet%2520rev%25200.9.pdf&ref=openhardware.directory&product=waveshare-wave-rover&source=md-export)
- **AK09918C** (magnetometer): 3-axis electronic compass for heading detection — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.akm.com%2Fcontent%2Fdam%2Fdocuments%2Fproducts%2Felectronic-compass%2Fak09918c%2Fak09918c-en-datasheet.pdf&ref=openhardware.directory&product=waveshare-wave-rover&source=md-export)
- **INA219** (current-sensor): I2C voltage/current/power monitor for battery management — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fina219.pdf&ref=openhardware.directory&product=waveshare-wave-rover&source=md-export)
- **CP2102** (usb-uart): USB-to-UART bridge for programming and LIDAR data — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=waveshare-wave-rover&source=md-export)
- **SSD1306** (display-driver): 0.91-inch 128x32 OLED display for status monitoring — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=waveshare-wave-rover&source=md-export)
- **GF12-N20** (motor): N20 geared motor, 12V rated, 200 RPM, 0.7 kg.cm stall torque (x4) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FWAVE_ROVER&ref=openhardware.directory&product=waveshare-wave-rover&source=md-export)

## Protocols

- **I2C**
- **UART**
- **SPI**
- **PWM**
- **ESP-NOW**
- **HTTP**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO25 | Motor A PWM | — | — |
| GPIO26 | Motor B PWM | — | — |
| GPIO17 | Motor A direction | — | — |
| GPIO21 | Motor A direction | — | — |
| GPIO22 | Motor B direction | — | — |
| GPIO23 | Motor B direction | — | — |
| GPIO32 | I2C SDA | — | — |
| GPIO33 | I2C SCL | — | — |
| GPIO18 | Servo UART RXD | — | — |
| GPIO19 | Servo UART TXD | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwave-rover.htm&ref=openhardware.directory&product=waveshare-wave-rover&source=md-export) — $89.99

## Available Software

- [ugv_base_general](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2Fugv_base_general&ref=openhardware.directory&product=waveshare-wave-rover&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwave-rover.htm&ref=openhardware.directory&product=waveshare-wave-rover&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2Fugv_base_general&ref=openhardware.directory&product=waveshare-wave-rover&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FWAVE_ROVER&ref=openhardware.directory&product=waveshare-wave-rover&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fw%2Fupload%2F3%2F37%2FGeneral_Driver_for_Robots.pdf&ref=openhardware.directory&product=waveshare-wave-rover&source=md-export)

## Tags

`robotics`, `rover`, `esp32`, `4wd`, `open-source`, `mobile-robot`, `raspberry-pi`, `jetson-nano`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-wave-rover)

---

# WiFi LoRa 32 (V4)

> Upgraded ESP32-S3R2 + SX1262 LoRa dev board with 2MB PSRAM, 16MB flash, 0.96" OLED, switchable FPC/IPEX 2.4G antenna, GNSS interface, and solar input. Meshtastic and LoRaWAN ready.

## Quick Facts

- **Brand:** Heltec
- **Board Type:** dev-board
- **Price:** ~$17.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector instructions, hardware AES/SHA/RSA
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C 2.0 (OTG)
- **Power:** 5V via USB-C / 3.7V LiPo / 4.7-6V solar
- **Dimensions:** 51.7 × 25.4 × 10.7mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-S3R2** (mcu): Xtensa LX7 dual-core at 240MHz with 512KB SRAM, 2MB integrated PSRAM, WiFi 802.11 b/g/n, BLE 5.0, 45 GPIOs, hardware AES/SHA/RSA crypto, and AI vector instructions. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=wifi-lora-32-v4&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver supporting 433/470/868/915MHz bands. Standard version: +21dBm TX; high-power variant: +28dBm TX, -137dBm RX sensitivity at SF12 BW=125kHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=wifi-lora-32-v4&source=md-export)
- **SSD1306** (display-driver): Solomon Systech SSD1306 driving the onboard 0.96-inch monochrome OLED display at 128×64 resolution via I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=wifi-lora-32-v4&source=md-export)
- **CP2102** (usb-serial): Silicon Labs CP2102 USB-to-UART bridge enabling serial programming and debug output over USB-C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=wifi-lora-32-v4&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO8 | LoRa NSS (SPI CS) | — | digital-output |
| GPIO9 | LoRa SCK | — | digital-output |
| GPIO10 | LoRa MOSI | — | digital-output, adc |
| GPIO11 | LoRa MISO | — | digital-input |
| GPIO12 | LoRa RESET | — | digital-output |
| GPIO13 | LoRa BUSY | — | digital-input |
| GPIO14 | LoRa DIO1 | — | digital-input |
| GPIO17 | OLED SDA | — | digital-output |
| GPIO18 | OLED SCL | — | digital-output |
| GPIO21 | OLED RST | — | digital-output |
| GPIO35 | LED (built-in) | — | digital-output, pwm |
| GPIO36 | Vext (external 3.3V power control) | — | digital-output |
| GPIO3 | I2C SDA (user) | — | digital-input, digital-output, adc, touch, pwm |
| GPIO4 | I2C SCL (user) | — | digital-input, digital-output, adc, touch, pwm |
| GPIO43 | UART TX | — | digital-output |
| GPIO44 | UART RX | — | digital-input |
| GPIO1 | ADC / User GPIO | — | digital-input, digital-output, adc, touch, pwm |
| GPIO2 | ADC / User GPIO | — | digital-input, digital-output, adc, touch, pwm |
| GPIO5 | ADC / User GPIO | — | digital-input, digital-output, adc, touch, pwm |
| GPIO6 | ADC / User GPIO | — | digital-input, digital-output, adc, touch, pwm |
| GPIO7 | ADC / User GPIO | — | digital-input, digital-output, adc, touch, pwm |
| GPIO33 | User GPIO | — | digital-input, digital-output, pwm |
| GPIO34 | User GPIO | — | digital-input, digital-output, pwm |
| GPIO45 | User GPIO (strapping) | — | digital-input, digital-output, pwm, strapping |
| GPIO46 | User GPIO (strapping) | — | digital-input, digital-output, pwm, strapping |
| GPIO47 | User GPIO | — | digital-input, digital-output, pwm |
| GPIO48 | User GPIO | — | digital-input, digital-output, pwm |

## Where to Buy

- [Heltec Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwifi-lora-32-v4%2F&ref=openhardware.directory&product=wifi-lora-32-v4&source=md-export) — 17.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwifi-lora-32-v4%2F&ref=openhardware.directory&product=wifi-lora-32-v4&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHeltec-Aaron-Lee%2FWiFi_Kit_series&ref=openhardware.directory&product=wifi-lora-32-v4&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fesp32-series%2Flora-32%2Fwifi-lora-32-v4%2F&ref=openhardware.directory&product=wifi-lora-32-v4&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWiFi_LoRa_32_V4%2Fdatasheet%2FWiFi_LoRa_32_V4.2.0.pdf&ref=openhardware.directory&product=wifi-lora-32-v4&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWiFi_LoRa_32_V4%2FSchematic&ref=openhardware.directory&product=wifi-lora-32-v4&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/wifi-lora-32-v4)

---

# Adafruit QT Py ESP32-S3

> Tiny dual-core ESP32-S3 dev board in the QT Py / Seeed XIAO footprint — 8 MB flash, WiFi, BLE 5, native USB-C, STEMMA QT, 13 GPIO, 10 ADC inputs, no PSRAM variant.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$12.5
- **CPU:** Xtensa LX7 dual-core @ 240 MHz (ESP32-S3)
- **RAM:** 512 KB SRAM
- **Flash:** 8MB
- **Power:** 5V
- **Dimensions:** 21.7 × 17.8 × 5.7 mm

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- circuitpython
- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core 240 MHz Xtensa LX7 with 512 KB SRAM, native USB OTG, WiFi, and BLE 5. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-qt-py-esp32-s3&source=md-export)

## Protocols

- **I2C**: SDA=GPIO5, SCL=GPIO6
- **I2C (STEMMA QT)**: SDA=GPIO5, SCL=GPIO6
- **SPI**: MOSI=GPIO35, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO18 | A0 | — | ADC, touch |
| GPIO17 | A1 | — | ADC, touch |
| GPIO9 | A2 | — | ADC, touch |
| GPIO8 | A3 | — | ADC, touch |
| GPIO5 | SDA (STEMMA QT) | — | I2C, STEMMA QT, touch |
| GPIO6 | SCL (STEMMA QT) | — | I2C, STEMMA QT, touch |
| GPIO35 | MOSI | — | SPI |
| GPIO36 | MISO | — | SPI |
| GPIO37 | SCK | — | SPI |
| GPIO43 | TX | — | UART |
| GPIO44 | RX | — | UART |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5426&ref=openhardware.directory&product=adafruit-qt-py-esp32-s3&source=md-export) — 12.5

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_qtpy_esp32s3_nopsram%2F&ref=openhardware.directory&product=adafruit-qt-py-esp32-s3&source=md-export)
- [Arduino ESP32](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Farduino-esp32&ref=openhardware.directory&product=adafruit-qt-py-esp32-s3&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5426&ref=openhardware.directory&product=adafruit-qt-py-esp32-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-QT-Py-ESP32-S3-PCB&ref=openhardware.directory&product=adafruit-qt-py-esp32-s3&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-qt-py-esp32-s3&ref=openhardware.directory&product=adafruit-qt-py-esp32-s3&source=md-export)

## Tags

`esp32-s3`, `qt-py`, `stemma-qt`, `circuitpython`, `native-usb`, `wifi`, `ble`, `tiny`, `xiao-compatible`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-qt-py-esp32-s3)

---

# Pycom LoPy

> The Pycom LoPy is a compact triple-network MicroPython-programmable board featuring ESP32 with built-in WiFi, BLE 4.2, and LoRa (SX1272) on 868/915 MHz — ideal for IoT mesh networking and asset tracking.

## Quick Facts

- **Brand:** Pycom
- **Board Type:** dev-board
- **Price:** ~$39.95
- **CPU:** Xtensa LX6 dual-core @ 240MHz (ESP32)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **Power:** 3.5V–5.5V via Expansion Board or 3.3V direct

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- micropython
- platformio

## Components


## Protocols

- **I2C**: SDA=P9, SCL=P10
- **SPI**: MOSI=P10, MISO=P11, SCK=P12
- **UART**: TX=P0, RX=P1
- **WiFi**
- **LoRa**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| P0 | P0 — GPIO / TX (GPIO1) | — | digital-input, digital-output |
| P1 | P1 — GPIO / RX (GPIO3) | — | digital-input, digital-output |
| P2 | P2 — GPIO (GPIO16) | — | digital-input, digital-output, pwm |
| P3 | P3 — GPIO (GPIO17) | — | digital-input, digital-output, pwm |
| P4 | P4 — GPIO (GPIO18) | — | digital-input, digital-output, pwm |
| P5 | P5 — GPIO (GPIO19) | — | digital-input, digital-output, pwm |
| P6 | P6 — GPIO (GPIO20) | — | digital-input, digital-output, pwm |
| P7 | P7 — GPIO (GPIO21) | — | digital-input, digital-output, pwm |
| P8 | P8 — GPIO (GPIO22) | — | digital-input, digital-output, pwm |
| P9 | P9 — I2C SDA (GPIO23) | — | digital-input, digital-output, pwm |
| P10 | P10 — I2C SCL (GPIO4) | — | digital-input, digital-output, pwm |
| P11 | P11 — GPIO (GPIO5) | — | digital-input, digital-output, pwm |
| P12 | P12 — ADC input-only (GPIO34) | — | adc, input-only |
| P13 | P13 — ADC input-only (GPIO35) | — | adc, input-only |
| P14 | P14 — ADC input-only (GPIO36) | — | adc, input-only |
| P15 | P15 — ADC input-only (GPIO39) | — | adc, input-only |
| P16 | P16 — GPIO (GPIO12) | — | digital-input, digital-output, pwm |
| P17 | P17 — GPIO (GPIO13) | — | digital-input, digital-output, pwm |
| P18 | P18 — GPIO (GPIO14) | — | digital-input, digital-output, pwm |
| P19 | P19 — GPIO (GPIO15) | — | digital-input, digital-output, pwm |
| P20 | P20 — GPIO (GPIO2) | — | digital-input, digital-output, pwm |
| P21 | P21 — GPIO / Boot (GPIO0) | — | digital-input, digital-output, pwm |

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3339&ref=openhardware.directory&product=pycom-lopy&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.pycom.io&ref=openhardware.directory&product=pycom-lopy&source=md-export)

## Tags

`esp32`, `lora`, `micropython`, `pycom`, `iot`, `ble`, `wifi`, `sx1272`, `lpwan`

---
[View full device page](https://openhardware.directory/s/1370/pycom-lopy)

---

# Pycom WiPy 3.0

> The Pycom WiPy 3.0 is a compact MicroPython-programmable ESP32 board with WiFi 802.11 b/g/n and Bluetooth BLE 4.2, designed for low-power wireless IoT applications and smart-home prototyping.

## Quick Facts

- **Brand:** Pycom
- **Board Type:** dev-board
- **Price:** ~$29.95
- **CPU:** Xtensa LX6 dual-core @ 240MHz (ESP32)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **Power:** 3.5V–5.5V via Expansion Board

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- micropython
- platformio

## Components


## Protocols

- **I2C**: SDA=P9, SCL=P10
- **SPI**: MOSI=P10, MISO=P11, SCK=P12
- **UART**: TX=P0, RX=P1
- **WiFi**
- **Bluetooth**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| P0 | P0 — GPIO / TX (GPIO1) | — | digital-input, digital-output |
| P1 | P1 — GPIO / RX (GPIO3) | — | digital-input, digital-output |
| P2 | P2 — GPIO (GPIO16) | — | digital-input, digital-output, pwm |
| P3 | P3 — GPIO (GPIO17) | — | digital-input, digital-output, pwm |
| P4 | P4 — GPIO (GPIO18) | — | digital-input, digital-output, pwm |
| P5 | P5 — GPIO (GPIO19) | — | digital-input, digital-output, pwm |
| P6 | P6 — GPIO (GPIO20) | — | digital-input, digital-output, pwm |
| P7 | P7 — GPIO (GPIO21) | — | digital-input, digital-output, pwm |
| P8 | P8 — GPIO (GPIO22) | — | digital-input, digital-output, pwm |
| P9 | P9 — I2C SDA (GPIO23) | — | digital-input, digital-output, pwm |
| P10 | P10 — I2C SCL (GPIO4) | — | digital-input, digital-output, pwm |
| P11 | P11 — GPIO (GPIO5) | — | digital-input, digital-output, pwm |
| P12 | P12 — ADC input-only (GPIO34) | — | adc, input-only |
| P13 | P13 — ADC input-only (GPIO35) | — | adc, input-only |
| P14 | P14 — ADC input-only (GPIO36) | — | adc, input-only |
| P15 | P15 — ADC input-only (GPIO39) | — | adc, input-only |
| P16 | P16 — GPIO (GPIO12) | — | digital-input, digital-output, pwm |
| P17 | P17 — GPIO (GPIO13) | — | digital-input, digital-output, pwm |
| P18 | P18 — GPIO (GPIO14) | — | digital-input, digital-output, pwm |
| P19 | P19 — GPIO (GPIO15) | — | digital-input, digital-output, pwm |
| P20 | P20 — GPIO (GPIO2) | — | digital-input, digital-output, pwm |
| P21 | P21 — GPIO / Boot (GPIO0) | — | digital-input, digital-output, pwm |

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3338&ref=openhardware.directory&product=pycom-wipy-3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.pycom.io&ref=openhardware.directory&product=pycom-wipy-3&source=md-export)

## Tags

`esp32`, `micropython`, `pycom`, `iot`, `ble`, `wifi`, `smart-home`

---
[View full device page](https://openhardware.directory/s/1370/pycom-wipy-3)

---

# Heltec Vision Master E290

> ESP32-S3 development board with 2.9-inch e-ink display and optional SX1262 LoRa radio, featuring Raspberry Pi GPIO header, Meshtastic support, and 18uA deep sleep for battery-powered IoT and mesh networking applications.

## Quick Facts

- **Brand:** Heltec Automation
- **Price:** ~$19.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, vector instructions, AES,SHA hardware crypto
- **RAM:** 512KB SRAM,16KB RTC SRAM
- **Flash:** 16MB (QSPI, W25Q128)
- **USB:** USB-C (native USB OTG)
- **Power:** 5V via USB-C,3.7V LiPo battery (SH1.25-2)
- **Dimensions:** 87.96 × 36.63 × 12mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-S3R8** (mcu): Espressif ESP32-S3R8 with Xtensa LX7 dual-core processor at 240MHz, 512KB SRAM, 8MB OPI PSRAM, WiFi 802.11 b/g/n, and Bluetooth LE 5.0. Features hardware AES/SHA crypto acceleration, 20 ADC channels, 14 touch inputs, and ULP co-processor for deep sleep operation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-vision-master-e290&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver supporting 433/868/915MHz bands with +22dBm TX power and -136dBm RX sensitivity at SF12/125kHz. Integrated via Heltec HT-RA62 module. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=heltec-vision-master-e290&source=md-export)
- **DEPG0290BNS800F6** (display-driver): Good Display 2.9-inch black and white e-paper module with 128x296 pixel resolution, SPI interface, and partial refresh support. Retains image for 180+ days without power. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-VME290%2FDEPG0290BNS800F6_V2.1.pdf&ref=openhardware.directory&product=heltec-vision-master-e290&source=md-export)
- **W25Q128** (flash-memory): Winbond W25Q128 16MB serial NOR flash memory providing firmware and data storage via QSPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.winbond.com%2Fhq%2Fproduct%2Fcode-storage-flash-memory%2Fserial-nor-flash%2F%3F__locale%3Den%26partNo%3DW25Q128JV&ref=openhardware.directory&product=heltec-vision-master-e290&source=md-export)

## Protocols

- **SPI** (SPI0): SCK=GPIO9, MOSI=GPIO10, MISO=GPIO11, CS=GPIO8
- **SPI (E-Ink)** (SPI1): SDI=GPIO1, CLK=GPIO2, CS=GPIO3, DC=GPIO4, RST=GPIO5, BUSY=GPIO6
- **SPI (LoRa)**: MISO=GPIO11, MOSI=GPIO10, SCK=GPIO9, NSS=GPIO8, RST=GPIO12, BUSY=GPIO13, DIO1=GPIO14
- **I2C**: SDA=GPIO39, SCL=GPIO38
- **UART**: TX=GPIO43, RX=GPIO44
- **UART (LoRa)**: URXD=GPIO44, UTXD=GPIO43
- **PWM**
- **ADC**
- **Touch**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO39 | I2C SDA / QL_SDA | — | digital-input, digital-output, pwm |
| GPIO38 | I2C SCL / QL_SCL / FSPIWP | — | digital-input, digital-output, pwm |
| GPIO07 | VBAT_READ / ADC1_CH6 / SUBSPIWP | — | digital-input, digital-output, adc, touch, pwm |
| GPIO06 | E-Ink BUSY | — | digital-input, digital-output, adc, touch, pwm |
| GPIO05 | E-Ink RST / ADC1_CH4 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO04 | E-Ink DC / ADC1_CH3 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO02 | E-Ink CLK / ADC1_CH1 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO01 | E-Ink SDI / ADC1_CH0 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO40 | LoRa NSS | — | digital-input, digital-output, pwm |
| GPIO45 | General Purpose GPIO | — | digital-input, digital-output, pwm |
| GPIO46 | General Purpose GPIO | — | digital-input, digital-output, pwm |
| GPIO44 | UART RXD / URXD | — | digital-input, digital-output, pwm |
| GPIO43 | UART TXD / UTXD | — | digital-input, digital-output, pwm |
| GPIO10 | SPI MOSI / LoRa MOSI | — | digital-input, digital-output, adc, touch, pwm |
| GPIO11 | SPI MISO / LoRa MISO | — | digital-input, digital-output, adc, touch, pwm |
| GPIO03 | E-Ink CS / ADC1_CH2 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO47 | SPICLK_P / SUBSPICLK_P | — | digital-input, digital-output, pwm |
| GPIO48 | SPICLK_N / SUBSPICLK_N | — | digital-input, digital-output, pwm |
| GPIO42 | ADC1_CH2 / General Purpose | — | digital-input, digital-output, pwm |
| GPIO41 | General Purpose GPIO | — | digital-input, digital-output, pwm |
| GPIO13 | LoRa BUSY | — | digital-input, digital-output, adc, touch, pwm |
| GPIO12 | LoRa RST | — | digital-input, digital-output, adc, touch, pwm |
| GPIO09 | SPI SCK / LoRa SCK | — | digital-input, digital-output, adc, touch, pwm |
| GPIO08 | SPI SS / LoRa NSS | — | digital-input, digital-output, adc, touch, pwm |
| GPIO18 | Vext Control (E-Ink power) | — | digital-input, digital-output, adc, pwm |
| GPIO21 | User Button (PRG) | — | digital-input, digital-output, pwm |
| GPIO14 | LoRa DIO1 | — | digital-input, digital-output, adc, touch, pwm |

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Heltec Official](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fvision-master-e290%2F&ref=openhardware.directory&product=heltec-vision-master-e290&source=md-export) — 19.90
- [Rokland](https://openhardware.directory/r?to=https%3A%2F%2Fstore.rokland.com%2Fproducts%2Fheltecvision-master-e290&ref=openhardware.directory&product=heltec-vision-master-e290&source=md-export) — 29.97
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FDevelopment-ESP32-S3R8-Compatible-PlatformIO-IoT%25EF%25BC%2588902-928MHz%2Fdp%2FB0D9JWT4P1&ref=openhardware.directory&product=heltec-vision-master-e290&source=md-export) — 45.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fvision-master-e290%2F&ref=openhardware.directory&product=heltec-vision-master-e290&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHeltec-Aaron-Lee%2FWiFi_Kit_series&ref=openhardware.directory&product=heltec-vision-master-e290&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fesp32-series%2Fvision-master%2Fvison-master-e290%2F&ref=openhardware.directory&product=heltec-vision-master-e290&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-VME290%2FHT-VME290-Datasheet.pdf&ref=openhardware.directory&product=heltec-vision-master-e290&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-VME290%2FHT-VME290_Schematic_Diagram_V0.3.1.pdf&ref=openhardware.directory&product=heltec-vision-master-e290&source=md-export)

## Tags

`esp32-s3`, `e-ink`, `lora`, `meshtastic`, `iot`, `low-power`, `e-paper`

---
[View full device page](https://openhardware.directory/s/1370/heltec-vision-master-e290)

---

# LILYGO T-Embed SI4732

> ESP32-S3 board with SI4732-A10 AM/FM/SW/LW radio receiver, 1.9" IPS display, 900mAh battery, and rotary encoder for a portable software-defined radio experience.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$38.96
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- micropython

## Components

- **ESP32-S3R8** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi 802.11 b/g/n and BLE 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-embed-si4732&source=md-export)
- **SI4732-A10** (radio-receiver): Silicon Labs SI4732-A10 single-chip radio receiver covering AM (520–1710 kHz), FM (64–108 MHz), shortwave (2.3–26.1 MHz), and longwave (153–279 kHz) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FSi4730-31-34-35-D60.pdf&ref=openhardware.directory&product=lilygo-t-embed-si4732&source=md-export)
- **ST7789V** (display-driver): Sitronix ST7789V TFT LCD driver controlling the 170×320 IPS panel via SPI interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7789.pdf&ref=openhardware.directory&product=lilygo-t-embed-si4732&source=md-export)
- **TP4056** (battery-charger): Single-cell lithium battery charger with 1A charge current and protection circuit — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdlnmh9ip6v2uc.cloudfront.net%2Fdatasheets%2FPrototyping%2FTP4056.pdf&ref=openhardware.directory&product=lilygo-t-embed-si4732&source=md-export)

## Where to Buy

- [undefined](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-embed-si4732&ref=openhardware.directory&product=lilygo-t-embed-si4732&source=md-export) — 38.96

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-embed-si4732&ref=openhardware.directory&product=lilygo-t-embed-si4732&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Embed-SI4732&ref=openhardware.directory&product=lilygo-t-embed-si4732&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-embed-si4732)

---

# LILYGO T3 S3 E-Paper

> LILYGO T3 S3 E-Paper is an ESP32-S3 LoRa development board with a 2.13-inch 250×122 e-paper display (DEPG0213BN), 4MB flash, 2MB PSRAM, WiFi, BLE 5, SX1262 LoRa transceiver, and LiPo battery support.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$23.61
- **CPU:** Xtensa LX7 dual-core @ 240MHz
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio
- esphome
- meshtastic

## Components

- **ESP32-S3FH4R2** (mcu): Espressif ESP32-S3FH4R2 dual-core Xtensa LX7 MCU with 4MB flash, 2MB PSRAM, WiFi 802.11 b/g/n, and Bluetooth 5 LE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t3-s3-epaper&source=md-export)
- **SX1262** (radio): Semtech SX1262 sub-GHz LoRa radio transceiver supporting 868MHz and 915MHz bands with up to +22dBm output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t3-s3-epaper&source=md-export)
- **DEPG0213BN** (display-driver): Good Display DEPG0213BN 2.13-inch black-and-white e-paper display module with 250×122 pixel resolution. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.good-display.com%2Fproduct%2F360.html&ref=openhardware.directory&product=lilygo-t3-s3-epaper&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Fts-s3-epaper&ref=openhardware.directory&product=lilygo-t3-s3-epaper&source=md-export) — $23.61

## Available Software

- [GxEPD2](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FZinggJM%2FGxEPD2&ref=openhardware.directory&product=lilygo-t3-s3-epaper&source=md-export)
- [T3-S3 Epaper Examples](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T5-Epaper-Series&ref=openhardware.directory&product=lilygo-t3-s3-epaper&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Fts-s3-epaper&ref=openhardware.directory&product=lilygo-t3-s3-epaper&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T5-Epaper-Series&ref=openhardware.directory&product=lilygo-t3-s3-epaper&source=md-export)

## Tags

`e-paper`, `e-ink`, `esp32-s3`, `lora`, `sx1262`, `2.13-inch`, `iot`, `battery`, `meshtastic`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t3-s3-epaper)

---

# Denky D4

> Open-source ESP32 Teleinfo reader board for French Linky energy meters. Pre-flashed with Tasmota, features USB-C, WiFi, QWIIC I2C port, and RGB LED. Reads both Standard and Historique TIC formats.

## Quick Facts

- **Brand:** hallard
- **Board Type:** IoT Sensor Board
- **Price:** ~$26.9
- **CPU:** ESP32-PICO-V3-02
- **RAM:** 520KB SRAM
- **Flash:** 8MB
- **USB:** USB-C (CH9102)
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- tasmota
- esphome
- arduino
- esp-idf
- micropython

## Components

- **ESP32-PICO-V3-02** (mcu): ESP32 system-in-package with dual-core Xtensa LX6 processor at 240MHz, integrated 8MB flash and 2MB PSRAM, WiFi and Bluetooth 4.2 connectivity — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-pico-v3-02_datasheet_en.pdf&ref=openhardware.directory&product=denky-d4&source=md-export)
- **CH9102** (usb-uart): USB to serial UART bridge IC providing USB-C connectivity for programming and serial communication — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH9102.html&ref=openhardware.directory&product=denky-d4&source=md-export)
- **SK6805-1515** (led-driver): Ultra-compact 1.5x1.5mm addressable RGB LED with integrated driver, WS2812-compatible protocol, used for status indication — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F4492%2FDatasheet.pdf&ref=openhardware.directory&product=denky-d4&source=md-export)
- **Teleinfo Interface** (sensor): Optocoupler-based interface circuit for reading French energy meter TIC serial data, supports both Standard (9600 baud) and Historique (1200 baud) modes with adjustable sensitivity trimmer — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fhallard%2FDenky-D4&ref=openhardware.directory&product=denky-d4&source=md-export)

## Protocols

- **I2C**
- **UART**
- **USB**
- **GPIO**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO8 | Teleinfo Rx | — | — |
| GPIO14 | RGB LED (SK6805) | — | — |
| GPIO21 | I2C SDA | — | — |
| GPIO22 | I2C SCL | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fhallard%2Fdenky-d4-esp32-tic-teleinfo-reader%2F&ref=openhardware.directory&product=denky-d4&source=md-export) — $26.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fhallard%2Fdenky-d4-esp32-tic-teleinfo-reader%2F&ref=openhardware.directory&product=denky-d4&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fhallard%2FDenky-D4&ref=openhardware.directory&product=denky-d4&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fhallard%2FDenky-D4&ref=openhardware.directory&product=denky-d4&source=md-export)

## Tags

`esp32`, `teleinfo`, `energy-monitor`, `linky`, `tasmota`, `esphome`, `open-source`, `french-energy-meter`, `tic`, `home-automation`, `wifi`, `qwiic`, `usb-c`

---
[View full device page](https://openhardware.directory/s/1370/denky-d4)

---

# AVR-HF ADX-MI3

> Pre-built digital mode QRP transceiver for amateur radio, supporting FT8, FT4, JS8, and WSPR on HF bands from 160m to 6m with ~5W output, OLED display, and single USB-C cable operation.

## Quick Facts

- **Brand:** JasonKits QRP
- **Board Type:** transceiver
- **Price:** ~$70
- **CPU:** AVR 8-bit single-core @ 16MHz
- **RAM:** 2KB SRAM
- **Flash:** 32KB
- **USB:** USB-C (gold-plated, integrated hub)
- **Power:** 12V DC input with PTC fuse protection

## Compatible Firmware

- arduino

## Components

- **ATmega328P** (mcu): Atmel ATmega328P 8-bit AVR RISC MCU running at 16MHz with 32KB flash, 2KB SRAM, and 1KB EEPROM. Controls all transceiver functions including frequency synthesis, band selection, OLED display, and CAT serial communication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf&ref=openhardware.directory&product=avr-hf-adx-mi3&source=md-export)
- **CD2003GP** (hf-receiver): Single-chip FM/AM radio receiver IC used as the front-end receiver for HF signal reception. Provides the receive signal path in this QRP transceiver design. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FWB2CBA%2FADX%2Fblob%2Fmain%2FCD2003.pdf&ref=openhardware.directory&product=avr-hf-adx-mi3&source=md-export)
- **Si5351** (clock-generator): Silicon Labs Si5351 I2C-programmable clock generator used as the variable frequency oscillator (VFO) for both transmit and receive frequency synthesis across all supported HF bands. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.skyworksinc.com%2F-%2Fmedia%2FSkyworks%2FSL%2Fdocuments%2Fpublic%2Fdata-sheets%2FSi5351-B.pdf&ref=openhardware.directory&product=avr-hf-adx-mi3&source=md-export)
- **SSD1306** (display-driver): Solomon Systech SSD1306 OLED display controller driving a 128×32 pixel monochrome OLED screen for frequency display, band information, and operating mode status. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=avr-hf-adx-mi3&source=md-export)

## Protocols

- **I2C** (I2C): SDA=A4, SCL=A5
- **UART** (UART0): RX=PD0, TX=PD1
- **USB** (USB-C): USB-C connector (integrated hub with sound card and serial adapter)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PD0 | UART RX (CAT control) | — | digital-input, digital-output |
| PD1 | UART TX (CAT control) | — | digital-input, digital-output |
| PD2 | Band ID 3 | — | digital-input, digital-output |
| PD3 | Band ID 1 | — | digital-input, digital-output, pwm |
| PD4 | UI Pushbutton | — | digital-input, digital-output |
| PD5 | TX LED | — | digital-input, digital-output, pwm |
| PD7 | Analog Comparator | — | digital-input, digital-output |
| PB0 | RX Gate | — | digital-input, digital-output |
| PB1 | Band ID 2 | — | digital-input, digital-output, pwm |
| PB2 | Band ID 0 | — | digital-input, digital-output, pwm |
| ADC6 | Battery Voltage Monitor | — | adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fjasonkits_qrp%2Favr-hf-adx-mi3-digital-mode-qrp-trx%2F&ref=openhardware.directory&product=avr-hf-adx-mi3&source=md-export) — $70.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fjasonkits_qrp%2Favr-hf-adx-mi3-digital-mode-qrp-trx%2F&ref=openhardware.directory&product=avr-hf-adx-mi3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fscottlbaker%2FADX-MINI&ref=openhardware.directory&product=avr-hf-adx-mi3&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fscottlbaker%2FADX-MINI%2Ftree%2Fmaster%2Fhardware%2FMI3%2Frev1.3%2Fgerbers&ref=openhardware.directory&product=avr-hf-adx-mi3&source=md-export)

## Tags

`qrp`, `amateur-radio`, `ham-radio`, `ft8`, `wspr`, `hf-transceiver`, `digital-modes`, `arduino`, `atmega328p`, `open-source`

---
[View full device page](https://openhardware.directory/s/1370/avr-hf-adx-mi3)

---

# DFRobot Beetle ESP32-C3

> Coin-sized ESP32-C3 RISC-V IoT development board with WiFi, BLE 5.0, integrated LiPo charging, 13 GPIO pins, and USB-C in a 25x20.5mm form factor.

## Quick Facts

- **Brand:** DFRobot
- **Price:** ~$7.9
- **CPU:** RISC-V single-core @ 160MHz, HW crypto (AES/SHA/RSA)
- **RAM:** 400KB SRAM
- **Flash:** 4MB
- **USB:** USB-C (native USB 2.0)
- **Power:** 5V USB-C / LiPo battery (BAT pin) / 5V external (VIN)
- **Dimensions:** 25 × 20.5mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-C3** (mcu): Espressif ESP32-C3 RISC-V single-core processor at 160MHz with 400KB SRAM, 4MB flash, WiFi 802.11 b/g/n, BLE 5.0, and hardware crypto acceleration. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-beetle-esp32-c3&source=md-export)
- **TP4057** (battery-charger): Linear lithium battery charger with up to 400mA programmable charge current for safe LiPo/Li-Ion charging. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdlnmh9ip6v2uc.cloudfront.net%2Fdatasheets%2FPrototyping%2FTP4056.pdf&ref=openhardware.directory&product=dfrobot-beetle-esp32-c3&source=md-export)

## Protocols

- **SPI** (SPI0): SCLK=GPIO4, MOSI=GPIO6, MISO=GPIO5, CS=GPIO7
- **I2C** (I2C0): SDA=GPIO21, SCL=GPIO22
- **UART** (UART0): RX=GPIO20

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | ADC1_CH0 / SD Card CS | — | digital-input, digital-output, adc |
| GPIO1 | ADC1_CH1 | — | digital-input, digital-output, adc |
| GPIO2 | ADC1_CH2 | — | digital-input, digital-output, adc |
| GPIO3 | ADC1_CH3 | — | digital-input, digital-output, adc |
| GPIO4 | SPI SCLK / ADC1_CH4 | — | digital-input, digital-output, adc, pwm |
| GPIO5 | SPI MISO / ADC2_CH0 | — | digital-input, digital-output, adc, pwm |
| GPIO6 | SPI MOSI | — | digital-input, digital-output, pwm |
| GPIO7 | SPI CS | — | digital-input, digital-output, pwm |
| GPIO8 | Digital I/O | — | digital-input, digital-output, pwm |
| GPIO9 | BOOT Button | — | digital-input, digital-output, strapping |
| GPIO10 | Onboard LED | — | digital-input, digital-output, pwm |
| GPIO20 | UART RX | — | digital-input, digital-output |
| GPIO21 | I2C SDA | — | digital-input, digital-output |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2566.html&ref=openhardware.directory&product=dfrobot-beetle-esp32-c3&source=md-export) — $7.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2566.html&ref=openhardware.directory&product=dfrobot-beetle-esp32-c3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_DFR0868_Beetle_ESP32_C3&ref=openhardware.directory&product=dfrobot-beetle-esp32-c3&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-beetle-esp32-c3&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdfimg.dfrobot.com%2Fnobody%2Fwiki%2F30b31d7cbf66fc9dbe38928552106295.pdf&ref=openhardware.directory&product=dfrobot-beetle-esp32-c3&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-beetle-esp32-c3)

---

# LILYGO T-Higrow

> ESP32 plant sensor board with capacitive soil moisture, soil fertility, BH1750 light sensor, and DHT11/BME280 temperature/humidity — WiFi-connected smart plant care for gardens and greenhouses.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$9.31
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro-USB
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- esphome
- platformio

## Components

- **ESP32-D0WDQ6** (mcu): Espressif ESP32-D0WDQ6 dual-core Xtensa LX6 at 240MHz with WiFi and Bluetooth 4.2/BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-higrow&source=md-export)
- **BH1750** (sensor): ROHM BH1750 I2C ambient light sensor with 1–65535 lux range for plant light-cycle monitoring. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2Fdatasheet%2F2%2F348%2Fbh1750fvi-e-186247.pdf&ref=openhardware.directory&product=lilygo-t-higrow&source=md-export)
- **DHT11** (sensor): AOSONG DHT11 digital temperature and humidity sensor (±2°C, ±5% RH) for environmental monitoring. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2Fdatasheet%2F2%2F758%2FDHT11-Technical-Data-Sheet-Translated-Version-1143054.pdf&ref=openhardware.directory&product=lilygo-t-higrow&source=md-export)

## Protocols

- **I2C**: SDA=GPIO25, SCL=GPIO26
- **UART**: TX=GPIO1, RX=GPIO3

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO25 | I2C SDA (BH1750) | — | digital-input, digital-output, dac |
| GPIO26 | I2C SCL (BH1750) | — | digital-input, digital-output, dac |
| GPIO32 | Soil Moisture ADC | — | digital-input, adc, rtc |
| GPIO33 | Soil Fertility ADC | — | digital-input, adc, rtc |
| GPIO0 | Boot / Free GPIO | — | digital-input, strapping |
| GPIO34 | DHT11 / BME280 Data | — | digital-input, adc, input-only |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-higrow&ref=openhardware.directory&product=lilygo-t-higrow&source=md-export) — $9.31

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-higrow&ref=openhardware.directory&product=lilygo-t-higrow&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FTTGO-HiGrow&ref=openhardware.directory&product=lilygo-t-higrow&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-higrow&source=md-export)

## Tags

`esp32`, `soil-sensor`, `plant`, `agriculture`, `lilygo`, `dht11`, `bme280`, `bh1750`, `wifi`, `esphome`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-higrow)

---

# LILYGO T-Display S3 AMOLED Plus

> Enhanced ESP32-S3 AMOLED development board with 1.91" RM67162 display, onboard RTC, PMU, SD card slot, capacitive touch, metal shielding, and external FPC antenna.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$32.68
- **CPU:** ESP32-S3R8
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n 2.4 GHz | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- esp-idf

## Components

- **ESP32-S3R8** (mcu): Dual-core Xtensa LX7 MCU running at up to 240 MHz with 8MB PSRAM, Wi-Fi 802.11 b/g/n and Bluetooth 5 LE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-display-s3-amoled-plus&source=md-export)
- **RM67162** (display-driver): 1.91-inch AMOLED display driver IC with SPI interface, 240×536 resolution, capacitive touch, IPS full viewing angle — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-AMOLED-Series%2Fblob%2Fmaster%2Fdatasheet%2FRM67162.pdf&ref=openhardware.directory&product=lilygo-t-display-s3-amoled-plus&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **SDIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-s3-amoled-plus&ref=openhardware.directory&product=lilygo-t-display-s3-amoled-plus&source=md-export) — $32.68

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-s3-amoled-plus&ref=openhardware.directory&product=lilygo-t-display-s3-amoled-plus&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-AMOLED-Series&ref=openhardware.directory&product=lilygo-t-display-s3-amoled-plus&source=md-export)

## Tags

`esp32-s3`, `amoled`, `display`, `rtc`, `pmu`, `sd-card`, `touch`, `wifi`, `bluetooth`, `lilygo`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-display-s3-amoled-plus)

---

# LILYGO Helium T-Beam

> ESP32 + SX1276 LoRa T-Beam variant optimized for the Helium IoT network — with NEO-6M GPS, AXP2101 PMU, and 18650 battery support for portable LoRaWAN network mapping and sensor nodes.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$30.52
- **CPU:** ESP32 Xtensa LX6 dual-core @ 240MHz
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro-USB (CH9102)
- **Power:** 5V + Li-Ion 18650

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- platformio

## Components

- **ESP32** (mcu): Espressif ESP32 dual-core Xtensa LX6 at 240MHz with 4MB flash, 8MB PSRAM, WiFi 802.11 b/g/n, and Bluetooth 4.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-helium-t-beam&source=md-export)
- **SX1276** (radio): Semtech SX1276 LoRa transceiver for 868/915 MHz with -148 dBm sensitivity and 300 kbps maximum data rate. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1276-7-8-9_W_APP_V7.pdf&ref=openhardware.directory&product=lilygo-helium-t-beam&source=md-export)
- **NEO-6M** (gps): u-blox NEO-6M GPS module with RTC crystal, wakeup interrupt support for low-power positioning. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.u-blox.com%2Fsites%2Fdefault%2Ffiles%2Fproducts%2Fdocuments%2FNEO-6_DataSheet_%28GPS.G6-HW-09005%29.pdf&ref=openhardware.directory&product=lilygo-helium-t-beam&source=md-export)
- **AXP2101** (battery-charger): X-Powers AXP2101 PMU providing power regulation, 18650 battery charging, and power path management. — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.x-powers.com%2Fen.php%2FInfo%2Fproduct_detail%2Farticle_id%2F95&ref=openhardware.directory&product=lilygo-helium-t-beam&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Fhelium-t-beam&ref=openhardware.directory&product=lilygo-helium-t-beam&source=md-export) — $30.52

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Fhelium-t-beam&ref=openhardware.directory&product=lilygo-helium-t-beam&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2Ftbeam-helium-mapper&ref=openhardware.directory&product=lilygo-helium-t-beam&source=md-export)

## Tags

`esp32`, `lora`, `gps`, `helium`, `lorawan`, `lilygo`, `18650`, `t-beam`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-helium-t-beam)

---

# M5Stack AtomS3 Lite

> Ultra-compact ESP32-S3 dev board (24x24mm) by M5Stack without display. Features WiFi, BLE 5.0, 8MB flash, Grove port, RGB LED, button, and USB-C in a tiny enclosure for IoT and embedded projects.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$9.45
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **GPIO:** 6 pins
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- esp-idf
- arduino
- esphome
- micropython

## Components

- **WS2812B** (LED): Single WS2812 addressable RGB LED for status indication and visual feedback — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812.pdf&ref=openhardware.directory&product=m5stack-atoms3-lite&source=md-export)
- **Programmable Button** (Button): Single programmable tactile button for user input and reset functionality — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FAtomS3%2520Lite&ref=openhardware.directory&product=m5stack-atoms3-lite&source=md-export)
- **USB-C** (Connector): USB Type-C connector for power supply and serial programming/debugging — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FAtomS3%2520Lite&ref=openhardware.directory&product=m5stack-atoms3-lite&source=md-export)
- **Grove Port** (Connector): Standard Grove port for connecting I2C sensors and actuators from the M5Stack and Seeed ecosystem — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2FGrove_System%2F&ref=openhardware.directory&product=m5stack-atoms3-lite&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stack-atoms3-lite&ref=openhardware.directory&product=m5stack-atoms3-lite&source=md-export) — $9.45
- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fatoms3-lite-esp32s3-dev-kit&ref=openhardware.directory&product=m5stack-atoms3-lite&source=md-export) — $7.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FAtomS3%2520Lite&ref=openhardware.directory&product=m5stack-atoms3-lite&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5AtomS3&ref=openhardware.directory&product=m5stack-atoms3-lite&source=md-export)

## Tags

`esp32-s3`, `m5stack`, `atom`, `ble`, `wifi`, `grove`, `iot`, `compact`, `esphome`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-atoms3-lite)

---

# HestiaPi ONE (Silent)

> Open-source smart thermostat based on Raspberry Pi Zero W with 3.5\" touchscreen, BME280 sensor, and silent solid-state relays. Fully local control with no cloud dependency, MQTT support, and Home Assistant compatibility.

## Quick Facts

- **Brand:** HestiaPi
- **Board Type:** smart-thermostat
- **Price:** ~$149.99
- **CPU:** BCM2835 ARM1176JZF-S @ 1GHz
- **RAM:** 512MB
- **Flash:** microSD (pre-flashed)
- **USB:** Micro-USB
- **Power:** 24V AC

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 4.1

## Compatible Firmware

- openhab

## Components

- **Raspberry Pi Zero W** (sbc): Broadcom BCM2835 SoC with 512MB RAM, WiFi 802.11 b/g/n, and Bluetooth 4.1 BLE single-board computer providing the main computing platform. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frpizero%2Fraspberry-pi-zero-w-reduced-schematics.pdf&ref=openhardware.directory&product=hestiapi-one-silent&source=md-export)
- **BME280** (environmental-sensor): Combined digital temperature, humidity, and barometric pressure sensor connected via I2C at address 0x76. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bme280-ds002.pdf&ref=openhardware.directory&product=hestiapi-one-silent&source=md-export)
- **AQG22205** (relay): Solid-state relay rated for 24V AC at 2A with zero-crossing switching for silent, click-free HVAC load control. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Findustrial.panasonic.com%2Fcdbs%2Fwww-data%2Fpdf%2FDSA0001%2FDSA0001COL14.pdf&ref=openhardware.directory&product=hestiapi-one-silent&source=md-export)
- **HLK-PM01** (ac-dc-converter): AC-DC power module converting 100-240V AC to 5V DC at 600mA for direct HVAC-powered operation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2209151801_HI-LINK-HLK-PM01_C209907.pdf&ref=openhardware.directory&product=hestiapi-one-silent&source=md-export)
- **XPT2046** (touch-controller): 4-wire resistive touchscreen controller with SPI interface and 12-bit ADC for the 3.5-inch touch display. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheetspdf.com%2Fpdf-file%2F746665%2FSHENZHENXPTEK%2FXPT2046%2F1&ref=openhardware.directory&product=hestiapi-one-silent&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **GPIO**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO02 | I2C SDA (BME280 sensor) | — | — |
| GPIO03 | I2C SCL (BME280 sensor) | — | — |
| GPIO12 | Relay 1 control | — | — |
| GPIO23 | Relay 2 control | — | — |
| GPIO18 | Relay 3 control | — | — |
| GPIO16 | Relay 4 control | — | — |
| GPIO11 | Touch panel IRQ | — | — |
| GPIO24 | LCD chip select | — | — |
| GPIO26 | Touch panel chip select | — | — |
| GPIO22 | LCD reset | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** GPL-3.0

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Feternalsunshine%2Fhestiapi-one-silent%2F&ref=openhardware.directory&product=hestiapi-one-silent&source=md-export) — $149.99

## Available Software

- [openHAB](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHestiaPi%2Fhestia-touch-openhab&ref=openhardware.directory&product=hestiapi-one-silent&source=md-export)
- [Home Assistant (via MQTT)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.home-assistant.io%2Fintegrations%2Fmqtt%2F&ref=openhardware.directory&product=hestiapi-one-silent&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hestiapi.com&ref=openhardware.directory&product=hestiapi-one-silent&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHestiaPi%2Fhestia-touch-openhab&ref=openhardware.directory&product=hestiapi-one-silent&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHestiaPi%2Fhestia-touch-openhab%2Fwiki&ref=openhardware.directory&product=hestiapi-one-silent&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHestiaPi%2Fhestia-touch-pcb-dev&ref=openhardware.directory&product=hestiapi-one-silent&source=md-export)

## Tags

`open-source`, `smart-thermostat`, `raspberry-pi`, `hvac`, `home-automation`, `privacy`, `local-control`, `mqtt`, `openhab`, `home-assistant`, `solid-state-relay`, `bme280`, `touchscreen`

---
[View full device page](https://openhardware.directory/s/1370/hestiapi-one-silent)

---

# 1.3" OLED I2C Display (128x64)

> Larger 1.3-inch monochrome OLED display with 128x64 pixel resolution and SH1106 driver IC. I2C interface with improved readability over smaller 0.96" modules, great for dashboards and readouts.

## Quick Facts

- **Brand:** OpenELAB
- **Board Type:** display-module
- **Price:** ~$7.99
- **CPU:** None (passive display module)
- **RAM:** None
- **Flash:** none
- **Power:** 3.3V-5V via header pins

## Components

- **SH1106** (display-driver): 132x64 monochrome OLED driver with I2C and SPI interface, built-in DC-DC converter and charge pump — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.velleman.eu%2Fdownloads%2F29%2Finfosheets%2Fsh1106_datasheet.pdf&ref=openhardware.directory&product=oled-13-inch-i2c-display&source=md-export)

## Protocols

- **I2C**

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2F13incholedi2c&ref=openhardware.directory&product=oled-13-inch-i2c-display&source=md-export) — $7.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2F13incholedi2c&ref=openhardware.directory&product=oled-13-inch-i2c-display&source=md-export)

## Tags

`oled`, `display`, `i2c`, `sh1106`, `128x64`, `monochrome`

---
[View full device page](https://openhardware.directory/s/1370/oled-13-inch-i2c-display)

---

# Seeed XIAO 2-Channel WiFi AC Relay

> ESP32-C6 based 2-channel AC relay module with WiFi 6, Zigbee 3.0, and Thread support. Compact relay board compatible with Arduino and ESPHome for smart home AC switching up to 10A per channel.

## Quick Facts

- **Brand:** Seeed Studio
- **Board Type:** relay-module
- **Price:** ~$23.85
- **CPU:** ESP32-C6
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **Power:** 100-240V AC

## Connectivity

WiFi WiFi 6 | Zigbee Zigbee 3.0

## Compatible Firmware

- arduino
- esphome

## Components

- **ESP32-C6** (MCU): Espressif ESP32-C6 — single-core RISC-V MCU with WiFi 6 (802.11ax), Zigbee 3.0, Thread 1.3, and Bluetooth 5.0 LE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=seeed-xiao-2-channel-wifi-ac-relay&source=md-export)
- **10A AC Relay** (Relay): 10A 250V AC single-pole double-throw relay for switching AC loads, two independent channels — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.seeedstudio.com%2FDual-Smart-Relay-Module-for-XIAO-p-6390.html&ref=openhardware.directory&product=seeed-xiao-2-channel-wifi-ac-relay&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fseeed-studio-xiao-2-channel-wi-fi-ac-relay&ref=openhardware.directory&product=seeed-xiao-2-channel-wifi-ac-relay&source=md-export) — $23.85

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.seeedstudio.com%2FDual-Smart-Relay-Module-for-XIAO-p-6309.html&ref=openhardware.directory&product=seeed-xiao-2-channel-wifi-ac-relay&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2F2_channel_wifi_ac_relay%2F&ref=openhardware.directory&product=seeed-xiao-2-channel-wifi-ac-relay&source=md-export)

## Tags

`esp32-c6`, `relay`, `seeed-studio`, `xiao`, `wifi-6`, `zigbee`, `thread`, `esphome`, `smart-home`, `ac-relay`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/seeed-xiao-2-channel-wifi-ac-relay)

---

# Airlytix ES1

> ESPHome-native indoor air quality sensor with PM1.0/PM2.5/PM4/PM10, CO2, VOC, NOx, temperature, humidity, pressure, light, and sound monitoring. Designed for Home Assistant with full local control and open YAML configuration.

## Quick Facts

- **Brand:** Airlytix
- **Board Type:** sensor-module
- **Price:** ~$149.02
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, hardware crypto (AES/SHA)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V
- **Dimensions:** 62.5 x 63 x 34mm

## Connectivity

WiFi 802.11 b/g/n (2.4GHz)

## Compatible Firmware

- esphome

## Components

- **ESP32** (mcu): Espressif ESP32 dual-core Xtensa LX6 microcontroller running at 240MHz with WiFi 802.11 b/g/n, 520KB SRAM, and 4MB flash. Runs ESPHome firmware with ESP-IDF framework. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=airlytix-es1&source=md-export)
- **SEN55** (particulate-matter-sensor): Sensirion SEN55 all-in-one environmental sensor measuring PM1.0/PM2.5/PM4/PM10 (0-1000 ug/m3), VOC index (<+/-15% precision), and NOx index (<+/-50% precision). Connected via I2C at address 0x69. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsensirion.com%2Fmedia%2Fdocuments%2F6791EFA0%2F62A1F68F%2FSensirion_Datasheet_Environmental_Node_SEN5x.pdf&ref=openhardware.directory&product=airlytix-es1&source=md-export)
- **SCD41** (co2-sensor): Sensirion SCD41 photoacoustic NDIR CO2 sensor with 400-5000 ppm range and +/-50 ppm accuracy. Supports automatic self-calibration and ambient pressure compensation. I2C address 0x62. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsensirion.com%2Fmedia%2Fdocuments%2F48C4B7FB%2F64C134E7%2FSensirion_SCD4x_Datasheet.pdf&ref=openhardware.directory&product=airlytix-es1&source=md-export)
- **SHT40** (temperature-sensor): Sensirion SHT40 digital temperature and humidity sensor with +/-0.2C temperature accuracy (-40 to 125C range) and +/-1.8% RH humidity accuracy. I2C address 0x44. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsensirion.com%2Fmedia%2Fdocuments%2F33FD6951%2F64E0FB27%2FSensirion_Datasheet_SHT4x.pdf&ref=openhardware.directory&product=airlytix-es1&source=md-export)
- **DPS310** (pressure-sensor): Infineon DPS310 XENSIV barometric pressure sensor with 300-1200 hPa range and +/-0.06 hPa relative accuracy. Provides pressure compensation data for the SCD41 CO2 sensor. I2C address 0x77. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.infineon.com%2Fdgdl%2FInfineon-DPS310-DataSheet-v01_02-EN.pdf%3FfileId%3D5546d462576f34750157750826c42242&ref=openhardware.directory&product=airlytix-es1&source=md-export)
- **VEML6040** (light-sensor): Vishay VEML6040 RGBW color sensor measuring illuminance (0.007865 lux/step, up to 16,496 lux) and correlated color temperature (CCT). Used for ambient light monitoring and lighting automation triggers. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.vishay.com%2Fdocs%2F84331%2Fveml6040.pdf&ref=openhardware.directory&product=airlytix-es1&source=md-export)
- **I2S MEMS Microphone** (microphone): I2S digital MEMS microphone for ambient sound level measurement. Captures A-weighted LAeq_1min and LApeak_1min at 48kHz sample rate, 24-bit resolution with APLL clock. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fwp-content%2Fuploads%2F2015%2F02%2FINMP441.pdf&ref=openhardware.directory&product=airlytix-es1&source=md-export)

## Protocols

- **I2C** (I2C0): SDA=GPIO20, SCL=GPIO19
- **I2S** (I2S0): LRCLK=GPIO27, BCLK=GPIO4, DIN=GPIO14

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO4 | I2S BCLK | — | digital-input, digital-output, adc, touch, pwm |
| GPIO13 | Status LED 2 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO14 | I2S DIN (Microphone Data) | — | digital-input, digital-output, adc, touch, pwm |
| GPIO19 | I2C SCL | — | digital-input, digital-output, pwm |
| GPIO20 | I2C SDA | — | digital-input, digital-output, pwm |
| GPIO25 | RGB Indicator LED Red | — | digital-input, digital-output, dac, pwm |
| GPIO26 | RGB Indicator LED Green | — | digital-input, digital-output, dac, pwm |
| GPIO27 | I2S LRCLK | — | digital-input, digital-output, adc, touch, pwm |
| GPIO32 | Status LED | — | digital-input, digital-output, adc, touch, pwm |
| GPIO33 | RGB Indicator LED Blue | — | digital-input, digital-output, adc, touch, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fairlytix%2Fairlytix-es1-esphome-smart-air-quality-sensor%2F&ref=openhardware.directory&product=airlytix-es1&source=md-export) — $149.02
- [Lectronz](https://openhardware.directory/r?to=https%3A%2F%2Flectronz.com%2Fproducts%2Fairlytix-es1-esphome-smart-air-quality-sensor&ref=openhardware.directory&product=airlytix-es1&source=md-export) — $104.04

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fairlytix%2Fairlytix-es1-esphome-smart-air-quality-sensor%2F&ref=openhardware.directory&product=airlytix-es1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fairlytix%2Fconfiguration&ref=openhardware.directory&product=airlytix-es1&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.airlytix.io%2F&ref=openhardware.directory&product=airlytix-es1&source=md-export)

## Tags

`esphome`, `air-quality`, `home-assistant`, `esp32`, `sensirion`, `indoor-monitoring`, `co2-sensor`, `particulate-matter`, `environmental-sensor`

---
[View full device page](https://openhardware.directory/s/1370/airlytix-es1)

---

# FeatherS2 ESP32-S2

> Full-featured ESP32-S2 Feather-compatible board by Unexpected Maker with 16MB Flash, 8MB QSPI PSRAM, WiFi, native USB-C, 21 GPIO, STEMMA QT, APA102 RGB LED, ambient light sensor, and dual 700mA LDOs.

## Quick Facts

- **Brand:** Unexpected Maker
- **Board Type:** dev-board
- **Price:** ~$24.95
- **CPU:** Xtensa LX7 single-core @ 240MHz (ESP32-S2)
- **RAM:** 320KB SRAM + 8MB QSPI PSRAM
- **Flash:** 16MB SPI Flash
- **Power:** 5V via USB-C or LiPoly battery
- **Dimensions:** 52.4 x 22.6 x 6.6mm

## Connectivity

WiFi 802.11 b/g/n @ 2.4GHz (ESP32-S2) | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- circuitpython
- esp-idf
- arduino
- micropython

## Components

- **ESP32-S2** (mcu): Espressif ESP32-S2 single-core Xtensa LX7 @ 240MHz, 320KB SRAM, WiFi 802.11 b/g/n, native USB 1.1 OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=feathers2-esp32-s2&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO35, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**: D-=GPIO19, D+=GPIO20
- **PWM**
- **ADC**
- **DAC**: DAC1=GPIO17, DAC2=GPIO18
- **Touch**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | D1 | — | GPIO, PWM, Touch, ADC |
| GPIO2 | D2 | — | GPIO, PWM, Touch, ADC |
| GPIO3 | D3/SDA | — | I2C, GPIO, Touch, ADC |
| GPIO4 | D4/SCL | — | I2C, GPIO, Touch, ADC |
| GPIO5 | D5 | — | GPIO, PWM, Touch, ADC |
| GPIO6 | D6 | — | GPIO, PWM, Touch, ADC |
| GPIO7 | D7 | — | GPIO, PWM, Touch, ADC |
| GPIO8 | D8/A5 | — | ADC, GPIO, Touch |
| GPIO9 | D9 | — | GPIO, PWM, Touch, ADC |
| GPIO10 | D10 | — | GPIO, PWM, Touch, ADC |
| GPIO11 | D11 | — | GPIO, Touch, ADC |
| GPIO12 | D12 | — | GPIO, Touch, ADC |
| GPIO13 | D13 | — | GPIO, Touch, ADC |
| GPIO14 | A3 | — | ADC, GPIO, Touch |
| GPIO15 | A4 | — | ADC, GPIO, Touch |
| GPIO16 | A4_alt | — | ADC, GPIO |
| GPIO17 | A0/DAC1 | — | ADC, DAC, GPIO |
| GPIO18 | A1/DAC2 | — | ADC, DAC, GPIO |
| GPIO19 | USB_D- | — | USB, GPIO |
| GPIO20 | USB_D+ | — | USB, GPIO |
| GPIO35 | MOSI | — | SPI, GPIO |
| GPIO36 | MISO | — | SPI, GPIO |
| GPIO37 | SCK | — | SPI, GPIO |
| GPIO43 | TX | — | UART, GPIO |
| GPIO44 | RX | — | UART, GPIO |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4769&ref=openhardware.directory&product=feathers2-esp32-s2&source=md-export) — 24.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4769&ref=openhardware.directory&product=feathers2-esp32-s2&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4769&ref=openhardware.directory&product=feathers2-esp32-s2&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Ffeathers2.io%2F&ref=openhardware.directory&product=feathers2-esp32-s2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FUnexpectedMaker%2Ffeathers2&ref=openhardware.directory&product=feathers2-esp32-s2&source=md-export)
- [circuitpython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Funexpectedmaker_feathers2%2F&ref=openhardware.directory&product=feathers2-esp32-s2&source=md-export)

## Tags

`feather`, `esp32-s2`, `wifi`, `unexpected-maker`, `psram`, `circuitpython`, `usb-c`, `stemma-qt`

## Certifications

RoHS, FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/feathers2-esp32-s2)

---

# ESP32-S2 WROOM Module

> The ESP32-S2 WROOM is an Espressif WiFi module with a single-core Xtensa LX7 at 240MHz, 4MB flash, 320KB SRAM, built-in PCB antenna, native USB OTG, and rich peripheral support — a cost-effective WiFi-only module (no Bluetooth) with USB capabilities for IoT and embedded designs.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** ESP32-S2
- **Price:** ~$1.95
- **CPU:** Xtensa LX7 single-core @ 240MHz (ESP32-S2)
- **RAM:** 320 KB SRAM
- **Flash:** 4 MB SPI flash
- **Power:** 3.0–3.6V
- **Dimensions:** 18mm × 31mm × 3.3mm

## Connectivity

WiFi 802.11 b/g/n (up to 150 Mbps)

## Compatible Firmware

- esp-idf
- arduino
- circuitpython
- micropython

## Components

- **ESP32-S2** (mcu): Espressif ESP32-S2 single-core Xtensa LX7 at 240MHz, 320KB SRAM, native USB OTG, 802.11 b/g/n WiFi, no Bluetooth — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F4919%2F4919_esp32-s2-wroom_esp32-s2-wroom-datasheet_en-1799809.pdf&ref=openhardware.directory&product=esp32-s2-wroom-module&source=md-export)

## Protocols

- **I2C**: SDA=GPIO37, SCL=GPIO36
- **SPI**: MOSI=GPIO16, MISO=GPIO17, SCK=GPIO18, CS=GPIO33
- **UART**: TX=GPIO34, RX=GPIO35
- **ADC**
- **DAC**
- **I2S**
- **PWM**
- **USB**
- **SDIO**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | GPIO0 | — | GPIO, ADC, Touch |
| GPIO1 | GPIO1 | — | GPIO, ADC, Touch |
| GPIO2 | GPIO2 | — | GPIO, ADC, Touch |
| GPIO3 | GPIO3 | — | GPIO, ADC, Touch |
| GPIO4 | GPIO4 | — | GPIO, ADC, Touch |
| GPIO5 | GPIO5 | — | GPIO, ADC, Touch |
| GPIO6 | GPIO6 | — | GPIO, ADC, Touch |
| GPIO7 | GPIO7 | — | GPIO, ADC, Touch |
| GPIO8 | GPIO8 | — | GPIO, Touch |
| GPIO9 | GPIO9 | — | GPIO, Touch |
| GPIO10 | GPIO10 | — | GPIO, Touch |
| GPIO11 | GPIO11 | — | GPIO, ADC |
| GPIO12 | GPIO12 | — | GPIO, ADC |
| GPIO13 | GPIO13 | — | GPIO, ADC |
| GPIO14 | GPIO14 | — | GPIO, ADC, DAC |
| GPIO15 | GPIO15 | — | GPIO, ADC, DAC |
| GPIO16 | GPIO16 | — | GPIO, SPI MOSI |
| GPIO17 | GPIO17 | — | GPIO, SPI MISO |
| GPIO18 | GPIO18 | — | GPIO, SPI CLK, USB D- |
| GPIO19 | GPIO19 | — | GPIO, USB D+ |
| GPIO21 | GPIO21 | — | GPIO |
| GPIO33 | GPIO33 | — | GPIO, SPI CS |
| GPIO34 | GPIO34 | — | GPIO, UART TX |
| GPIO35 | GPIO35 | — | GPIO, UART RX |
| GPIO36 | GPIO36 | — | GPIO, I2C SCL |
| GPIO37 | GPIO37 | — | GPIO, I2C SDA |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4919&ref=openhardware.directory&product=esp32-s2-wroom-module&source=md-export) — $1.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4919&ref=openhardware.directory&product=esp32-s2-wroom-module&source=md-export)
- [docs](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.espressif.com%2Fprojects%2Fesp-idf%2Fen%2Flatest%2Fesp32s2%2F&ref=openhardware.directory&product=esp32-s2-wroom-module&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp32-s2&ref=openhardware.directory&product=esp32-s2-wroom-module&source=md-export)

## Tags

`esp32-s2`, `wroom`, `wifi`, `espressif`, `xtensa-lx7`, `usb-otg`, `module`, `iot`, `circuitpython`, `micropython`

## Certifications

FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/esp32-s2-wroom-module)

---

# BigTreeTech PAD 7

> 7-inch all-in-one 3D printer control panel with 1024x600 IPS touchscreen, pre-installed CB1 core board running Klipper, Ethernet, WiFi, 3x USB 2.0, CAN bus, and built-in speaker.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Single Board Computer
- **CPU:** Allwinner H616 Quad-core Cortex-A53 @ 1.5GHz (CB1)
- **RAM:** 1GB DDR3L
- **Flash:** None (32GB microSD included)
- **GPIO:** 40-pin (via CB1) pins
- **USB:** 3x USB 2.0,1x USB OTG
- **Power:** DC 12V/2A

## Connectivity

WiFi true | Ethernet true

## Compatible Firmware

- Klipper
- Armbian
- Debian

## Components

- **Allwinner H616** (cpu): Allwinner H616 quad-core ARM Cortex-A53 @ 1.5GHz, part of the CB1 compute module — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flinux-sunxi.org%2FH616&ref=openhardware.directory&product=bigtreetech-pad-7&source=md-export)
- **7-inch IPS 1024x600** (display): 7-inch IPS display, 1024x600 resolution, 500 cd/m² brightness, 5-point capacitive touch — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fbigtreetech.github.io%2Fdocs%2FPad7.html&ref=openhardware.directory&product=bigtreetech-pad-7&source=md-export)
- **MCP2515** (can-controller): Microchip MCP2515 SPI-to-CAN bus controller for CAN peripheral interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.microchip.com%2Fen-us%2Fproduct%2Fmcp2515&ref=openhardware.directory&product=bigtreetech-pad-7&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **CAN**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-pad-7&ref=openhardware.directory&product=bigtreetech-pad-7&source=md-export)

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FPad7&ref=openhardware.directory&product=bigtreetech-pad-7&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-pad-7&ref=openhardware.directory&product=bigtreetech-pad-7&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.bttwiki.com%2FPAD7.html&ref=openhardware.directory&product=bigtreetech-pad-7&source=md-export)

## Tags

`3d-printing`, `klipper`, `touchscreen`, `control-panel`, `allwinner-h616`, `can-bus`, `bigtreetech`, `pad`, `all-in-one`, `7-inch`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-pad-7)

---

# LILYGO T-TWR

> ESP32-S3 walkie-talkie development board with SA868 UHF/VHF radio module, 0.96" OLED display, rotary encoder, WiFi, BLE, and 18650 battery support for two-way radio projects.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$35.7
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + Li-Ion 18650

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3-WROOM-1-N16R8** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi 802.11 b/g/n, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-twr&source=md-export)
- **SA868** (vhf-uhf-radio): Analog FM voice transceiver module covering UHF (400–480 MHz) or VHF (134–174 MHz) bands. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-TWR&ref=openhardware.directory&product=lilygo-t-twr&source=md-export)
- **SSD1306** (display-driver): I2C monochrome OLED display driver for 128×64 pixel display. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t-twr&source=md-export)

## Protocols

- **I2C**: SDA=GPIO13, SCL=GPIO14
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO13 | I2C SDA (OLED) | — | digital-input, digital-output |
| GPIO14 | I2C SCL (OLED) | — | digital-input, digital-output |
| GPIO21 | OLED Enable | — | digital-output |
| GPIO3 | Encoder/Button IO3 | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-twr&ref=openhardware.directory&product=lilygo-t-twr&source=md-export) — $35.70

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-twr&ref=openhardware.directory&product=lilygo-t-twr&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-TWR&ref=openhardware.directory&product=lilygo-t-twr&source=md-export)

## Tags

`esp32-s3`, `walkie-talkie`, `sa868`, `uhf`, `vhf`, `radio`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-twr)

---

# LILYGO T-Embed CC1101

> ESP32-S3 multi-protocol RF tool with CC1101 sub-GHz transceiver (300–928 MHz), 13.56 MHz RFID, IR transmit/receive, 1.9" IPS display, and rotary encoder for RF analysis and replay attacks.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$54.67
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-embed-cc1101&source=md-export)
- **ST7789V** (display-driver): SPI IPS TFT LCD driver for 170×320 resolution color display. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7789V.pdf&ref=openhardware.directory&product=lilygo-t-embed-cc1101&source=md-export)
- **CC1101** (sub-ghz-radio): Multi-band sub-1 GHz RF transceiver covering 300–928 MHz with FSK/OOK/MSK modulation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fcc1101.pdf&ref=openhardware.directory&product=lilygo-t-embed-cc1101&source=md-export)

## Protocols

- **SPI**: CLK=GPIO12, MOSI=GPIO11, MISO=GPIO13, CS=GPIO10
- **I2C**: SDA=GPIO4, SCL=GPIO5
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO11 | SPI MOSI | — | digital-input, digital-output |
| GPIO12 | SPI CLK | — | digital-input, digital-output |
| GPIO4 | I2C SDA | — | digital-input, digital-output |
| GPIO5 | I2C SCL | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-embed-cc1101&ref=openhardware.directory&product=lilygo-t-embed-cc1101&source=md-export) — $54.67

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-embed-cc1101&ref=openhardware.directory&product=lilygo-t-embed-cc1101&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Embed-CC1101&ref=openhardware.directory&product=lilygo-t-embed-cc1101&source=md-export)

## Tags

`esp32-s3`, `cc1101`, `sub-ghz`, `rfid`, `ir`, `rf-tool`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-embed-cc1101)

---

# LILYGO T-Panel S3

> Dual-MCU smart panel (ESP32-S3 + ESP32-H2) with 4" 480×480 IPS LCD (ST7701S), WiFi, BLE, native Zigbee/Thread/Matter via H2 co-processor, and optional RS485/CAN FD expansion for wall-mounted smart home controllers.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$35.99
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0 | Zigbee Zigbee 3.0

## Compatible Firmware

- arduino
- esp-idf
- esphome

## Components

- **ESP32-S3** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi, and BLE 5.0 for main application logic. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-panel-s3&source=md-export)
- **ESP32-H2** (mcu): RISC-V co-processor providing native IEEE 802.15.4 for Zigbee 3.0, Thread 1.3, and Matter 1.0 support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-h2_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-panel-s3&source=md-export)
- **ST7701S** (display-driver): RGB+SPI interface IPS LCD driver supporting 480×480 resolution for large smart panel displays. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Panel&ref=openhardware.directory&product=lilygo-t-panel-s3&source=md-export)

## Protocols

- **SPI**: CLK=GPIO12, MOSI=GPIO11, CS=GPIO10
- **I2C**: SDA=GPIO8, SCL=GPIO9
- **RS-485**: TX=GPIO17, RX=GPIO18
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO8 | I2C SDA | — | digital-input, digital-output |
| GPIO9 | I2C SCL | — | digital-input, digital-output |
| GPIO17 | RS-485 TX | — | digital-output |
| GPIO18 | RS-485 RX | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-panel-s3&ref=openhardware.directory&product=lilygo-t-panel-s3&source=md-export) — $35.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-panel-s3&ref=openhardware.directory&product=lilygo-t-panel-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Panel&ref=openhardware.directory&product=lilygo-t-panel-s3&source=md-export)

## Tags

`esp32-s3`, `esp32-h2`, `matter`, `zigbee`, `thread`, `smart-panel`, `4-inch`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-panel-s3)

---

# LILYGO T3 S3

> ESP32-S3 LoRa development board with 0.96" OLED display, multiple LoRa module options (SX1262/SX1276/SX1280/LR1121), WiFi, BLE, and 18650 battery support for Meshtastic and IoT applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$13.61
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V + Li-Ion 18650

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- esp-idf
- meshtastic

## Components

- **ESP32-S3FH4R2** (mcu): Xtensa LX7 dual-core at 240MHz with 4MB flash, 2MB PSRAM, WiFi 802.11 b/g/n, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t3-s3&source=md-export)
- **SX1262** (radio): Long-range LoRa transceiver covering 150–960 MHz. Also available with SX1276, SX1280, or LR1121. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t3-s3&source=md-export)
- **SSD1306** (display-driver): I2C monochrome OLED display driver for 128×64 pixel display. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t3-s3&source=md-export)

## Protocols

- **SPI**: CLK=GPIO12, MOSI=GPIO11, MISO=GPIO13
- **I2C**: SDA=GPIO18, SCL=GPIO17
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO18 | I2C SDA (OLED) | — | digital-input, digital-output |
| GPIO17 | I2C SCL (OLED) | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft3-s3-v1-3&ref=openhardware.directory&product=lilygo-t3-s3&source=md-export) — $13.61

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft3-s3-v1-3&ref=openhardware.directory&product=lilygo-t3-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT3-S3&ref=openhardware.directory&product=lilygo-t3-s3&source=md-export)

## Tags

`esp32-s3`, `lora`, `oled`, `meshtastic`, `18650`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t3-s3)

---

# LILYGO T-Weigh

> ESP32 development board combining 4-channel HX711 load cell amplifiers with LoRa SX1262 radio (868/915 MHz) for wireless weight measurement and IoT scale applications over long-range LoRa networks.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$20.88
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **Power:** 5-12V DC

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32** (mcu): Dual-core 240MHz Xtensa LX6 with integrated WiFi and BLE 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-weigh&source=md-export)
- **HX711** (adc): 24-bit analog-to-digital converter for precision weight measurement with 4-channel load cell support — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Favia-semiconductor-xiamen%2FHX711%2F7350216&ref=openhardware.directory&product=lilygo-t-weigh&source=md-export)
- **SX1262** (radio): LoRa/FSK sub-GHz transceiver with up to +22 dBm PA, -148 dBm sensitivity, supporting EU868 and US915 bands — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=lilygo-t-weigh&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **SDIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-weigh&ref=openhardware.directory&product=lilygo-t-weigh&source=md-export) — $20.88

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-weigh&ref=openhardware.directory&product=lilygo-t-weigh&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Weigh&ref=openhardware.directory&product=lilygo-t-weigh&source=md-export)

## Tags

`esp32`, `lora`, `hx711`, `load-cell`, `weight-sensor`, `iot-scale`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-weigh)

---

# WT32-ETH01

> ESP32 module with built-in Ethernet (LAN8720A PHY), WiFi, and Bluetooth. Designed for wired IoT applications, gateways, and industrial automation where reliable network connectivity is essential.

## Quick Facts

- **Brand:** Wireless-Tag
- **Board Type:** dev-board
- **Price:** ~$15
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **GPIO:** 12 pins
- **Power:** 5V via pin header

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2 | Ethernet 10/100 Mbps

## Compatible Firmware

- arduino
- esp-idf
- micropython
- esphome
- tasmota

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 microcontroller at 240 MHz with WiFi and Bluetooth 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=wt32-eth01&source=md-export)
- **LAN8720A** (network): Microchip LAN8720A 10/100 Base-T Ethernet PHY transceiver with RMII interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FLAN8720A.pdf&ref=openhardware.directory&product=wt32-eth01&source=md-export)
- **RJ45 Connector** (connector): RJ45 Ethernet connector for wired network connectivity — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FLAN8720A.pdf&ref=openhardware.directory&product=wt32-eth01&source=md-export)

## Protocols

- **UART**
- **I2C**
- **SPI**
- **RMII**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwt32-eth01-esp32&ref=openhardware.directory&product=wt32-eth01&source=md-export) — $15.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwt32-eth01-esp32&ref=openhardware.directory&product=wt32-eth01&source=md-export)

## Tags

`esp32`, `ethernet`, `lan8720a`, `wireless-tag`, `iot`, `gateway`, `industrial`

---
[View full device page](https://openhardware.directory/s/1370/wt32-eth01)

---

# M5Stack NanoC6

> Ultra-compact ESP32-C6 dev board by M5Stack with WiFi 6, BLE 5.0, Zigbee 3.0, and Thread/Matter support. RISC-V single-core at 160MHz, USB-C, RGB LED, and button in a tiny form factor.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$8.95
- **CPU:** ESP32-C6
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.0 | Zigbee Zigbee 3.0

## Compatible Firmware

- esp-idf
- arduino
- esphome
- micropython

## Components

- **WS2812B** (LED): Single WS2812 addressable RGB LED for status indication and visual feedback — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812.pdf&ref=openhardware.directory&product=m5stack-nanoc6&source=md-export)
- **User Button** (Button): Single tactile push button for user input and boot mode selection — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FM5NanoC6&ref=openhardware.directory&product=m5stack-nanoc6&source=md-export)
- **USB-C** (Connector): USB Type-C connector for power supply and serial programming/debugging — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FM5NanoC6&ref=openhardware.directory&product=m5stack-nanoc6&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fnanoc6-dev-kit&ref=openhardware.directory&product=m5stack-nanoc6&source=md-export) — $8.95
- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stack-nanoc6-dev-kit&ref=openhardware.directory&product=m5stack-nanoc6&source=md-export) — $6.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FM5NanoC6&ref=openhardware.directory&product=m5stack-nanoc6&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5NanoC6&ref=openhardware.directory&product=m5stack-nanoc6&source=md-export)

## Tags

`esp32-c6`, `wifi-6`, `zigbee`, `thread`, `matter`, `risc-v`, `m5stack`, `ble`, `iot`, `smart-home`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-nanoc6)

---

# DFRobot FireBeetle 2 ESP32-S3 AIoT Camera

> ESP32-S3 development board with integrated OV2640 camera, 16MB flash, 8MB PSRAM, WiFi and BLE connectivity. Designed for AIoT applications, computer vision, and edge AI projects.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** dev-board
- **Price:** ~$22.9
- **CPU:** ESP32-S3
- **Flash:** 16MB
- **USB:** Type-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- micropython

## Components

- **OV2640** (Camera): 2MP camera module for image capture and streaming — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2FOV2640_DS.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-s3-aiot-camera&source=md-export)
- **ESP32-S3** (SoC): Dual-core Xtensa LX7 with AI acceleration — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-s3-aiot-camera&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fdfrobot-firebeetle-aiot-camera&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-s3-aiot-camera&source=md-export) — $22.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fdfrobot-firebeetle-aiot-camera&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-s3-aiot-camera&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FDFRobot%2FFireBeetle-ESP32S3&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-s3-aiot-camera&source=md-export)

## Tags

`esp32-s3`, `camera`, `aiot`, `computer-vision`, `dfrobot`, `ov2640`, `edge-ai`

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-firebeetle-2-esp32-s3-aiot-camera)

---

# DFPlayer Mini MP3 Module

> Compact MP3/WAV/WMA audio player module with microSD slot, UART serial control, and built-in 3W amplifier — one of the most popular audio modules for Arduino and IoT projects.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** module
- **Price:** ~$5.99
- **CPU:** N/A (dedicated audio decoder IC)
- **RAM:** N/A
- **Flash:** N/A
- **Power:** 3.2V-5V DC

## Components

- **24-bit DAC** (Audio): High-quality DAC with 90dB dynamic range and 85dB SNR for audio output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FDFPlayer_Mini_SKU_DFR0299&ref=openhardware.directory&product=dfplayer-mini&source=md-export)
- **3W Class-D Amplifier** (Audio): Integrated class-D amplifier capable of directly driving speakers up to 3W — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FDFPlayer_Mini_SKU_DFR0299&ref=openhardware.directory&product=dfplayer-mini&source=md-export)
- **MicroSD Card Slot** (Storage): FAT16/FAT32 compatible microSD slot supporting cards up to 32GB — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FDFPlayer_Mini_SKU_DFR0299&ref=openhardware.directory&product=dfplayer-mini&source=md-export)

## Protocols

- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FDFPlayer_Mini_SKU_DFR0299&ref=openhardware.directory&product=dfplayer-mini&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FDFPlayer_Mini_SKU_DFR0299&ref=openhardware.directory&product=dfplayer-mini&source=md-export)

## Tags

`audio`, `mp3`, `uart`, `speaker`, `microsd`, `dfplayer`, `arduino`

---
[View full device page](https://openhardware.directory/s/1370/dfplayer-mini)

---

# Shelly Plus 1

> ESP32-C3 based WiFi/BLE smart relay module with 16A switching capacity, dry contact input, and compact DIN-rail or in-wall form factor. Flashable with Tasmota or ESPHome for local smart home control.

## Quick Facts

- **Brand:** Shelly
- **Board Type:** relay-module
- **Price:** ~$11.99
- **CPU:** ESP32-C3
- **RAM:** 400KB SRAM
- **Flash:** 4MB
- **Power:** 100-240V AC or 12V DC

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- Shelly OS
- tasmota
- esphome

## Components

- **ESP32-C3** (Microcontroller): Single-core 32-bit RISC-V microcontroller at 160MHz with integrated WiFi 802.11 b/g/n and Bluetooth 5.0 LE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=shelly-plus-1&source=md-export)
- **16A Relay** (Relay): Single-pole single-throw relay rated for 16A at 240V AC, suitable for switching most household loads including lights and small appliances — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.shelly.com%2Fen%2Fproducts%2Fshop%2Fshelly-plus-1&ref=openhardware.directory&product=shelly-plus-1&source=md-export)
- **AC-DC Converter** (Power Supply): Built-in power supply supporting 100-240V AC or 12V DC input, providing regulated 3.3V to the ESP32-C3 module — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.shelly.com%2Fen%2Fproducts%2Fshop%2Fshelly-plus-1&ref=openhardware.directory&product=shelly-plus-1&source=md-export)

## Protocols

- **WiFi 802.11 b/g/n**
- **Bluetooth 5.0 LE**
- **MQTT**
- **HTTP REST API**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.shelly.com%2Fen%2Fproducts%2Fshop%2Fshelly-plus-1&ref=openhardware.directory&product=shelly-plus-1&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Ftemplates.blakadder.com%2Fshelly_plus_1.html&ref=openhardware.directory&product=shelly-plus-1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Farendst%2FTasmota&ref=openhardware.directory&product=shelly-plus-1&source=md-export)

## Tags

`esp32-c3`, `wifi`, `bluetooth`, `tasmota`, `esphome`, `relay`, `smart-switch`, `home-automation`, `shelly`, `din-rail`

## Certifications

CE, UL

---
[View full device page](https://openhardware.directory/s/1370/shelly-plus-1)

---

# Adafruit HalloWing M4 Express

> Skull-shaped ATSAMD51J19 dev board (120MHz Cortex-M4F) with a 1.54" 240×240 IPS TFT, 4 capacitive touch inputs, 4 NeoPixels, accelerometer, speaker driver, and LiPoly charging. Perfect for Halloween props and wearables.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** microcontroller-board
- **Price:** ~$39.95
- **CPU:** ARM Cortex-M4F @ 120MHz (ATSAMD51J19)
- **RAM:** 192KB
- **Flash:** 512KB + 8MB SPI Flash
- **Power:** 5V via Micro-USB or LiPoly battery
- **Dimensions:** approx 60 x 53mm (skull shape)

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- circuitpython
- arduino

## Components

- **ATSAMD51J19** (mcu): ARM Cortex-M4F @ 120MHz, 512KB Flash, 192KB RAM, 3.3V logic. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D5xE5x_Family_Data_Sheet_DS60001507F.pdf&ref=openhardware.directory&product=adafruit-hallowing-m4-express&source=md-export)
- **MSA311** (mcu): 3-axis MEMS digital accelerometer, I2C interface, low power. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5309%2Fmsa311-v1.1-EN.pdf&ref=openhardware.directory&product=adafruit-hallowing-m4-express&source=md-export)

## Protocols

- **I2C**: SDA=SDA, SCL=SCL
- **SPI**: MOSI=D11, MISO=D12, SCK=D13
- **UART**: TX=D1, RX=D0
- **PWM**
- **ADC**
- **capacitive-touch**: T4=D4, T5=D5, T6=D6, T7=D7

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| A0 | A0 — ADC/DAC | — | analog-input, dac, digital-input, digital-output |
| A1 | A1 — ADC | — | analog-input, digital-input, digital-output |
| A2 | A2 — ADC | — | analog-input, digital-input, digital-output |
| A3 | A3 — ADC | — | analog-input, digital-input, digital-output |
| D4 | D4 — Capacitive Touch | — | digital-input, digital-output, capacitive-touch |
| D5 | D5 — Capacitive Touch | — | digital-input, digital-output, capacitive-touch |
| D6 | D6 — Capacitive Touch | — | digital-input, digital-output, capacitive-touch |
| D7 | D7 — Capacitive Touch | — | digital-input, digital-output, capacitive-touch |
| SDA | SDA — I2C Data (D20) | — | digital-input, digital-output, i2c-sda |
| SCL | SCL — I2C Clock (D21) | — | digital-input, digital-output, i2c-scl |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4300&ref=openhardware.directory&product=adafruit-hallowing-m4-express&source=md-export) — 39.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4300&ref=openhardware.directory&product=adafruit-hallowing-m4-express&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4300&ref=openhardware.directory&product=adafruit-hallowing-m4-express&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-hallowing-m4&ref=openhardware.directory&product=adafruit-hallowing-m4-express&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_HalloWing&ref=openhardware.directory&product=adafruit-hallowing-m4-express&source=md-export)

## Tags

`halloween`, `atsamd51`, `circuitpython`, `neopixel`, `tft`, `capacitive-touch`, `feather`, `wearable`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-hallowing-m4-express)

---

# TinyS2 ESP32-S2

> Ultra-compact ESP32-S2 development board by Unexpected Maker in the TinyPICO form factor, with 4 MB flash, 2 MB PSRAM, native USB, WiFi, and LiPo charging at just 17.8 × 41 mm.

## Quick Facts

- **Brand:** Unexpected Maker
- **Board Type:** dev-board
- **Price:** ~$18.5
- **CPU:** Xtensa LX7 single-core @ 240 MHz (ESP32-S2)
- **RAM:** 320 KB SRAM + 2 MB PSRAM
- **Flash:** 4MB
- **Power:** 5V + LiPo
- **Dimensions:** 17.8 × 41 mm

## Connectivity

WiFi 2.4GHz 802.11 b/g/n

## Compatible Firmware

- circuitpython
- micropython
- arduino
- esp-idf

## Components

- **ESP32-S2** (mcu): Espressif ESP32-S2 single-core 240 MHz Xtensa LX7 with native USB OTG, 2.4 GHz WiFi, and 320 KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=tinys2-esp32-s2&source=md-export)

## Protocols

- **I2C**: SDA=GPIO8, SCL=GPIO9
- **SPI**: SCK=GPIO17, MOSI=GPIO35, MISO=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | A0 | — | ADC, touch |
| GPIO2 | A1 | — | ADC, touch |
| GPIO3 | A2 | — | ADC, touch |
| GPIO4 | A3 | — | ADC, touch |
| GPIO5 | D5 | — | GPIO, PWM |
| GPIO6 | D6 | — | GPIO, PWM |
| GPIO7 | D7 | — | GPIO, PWM |
| GPIO8 | SDA/D8 | — | I2C, PWM, touch |
| GPIO9 | SCL/D9 | — | I2C, PWM, touch |
| GPIO10 | D10 | — | GPIO, PWM |
| GPIO11 | D11 | — | GPIO, PWM |
| GPIO12 | D12 | — | GPIO, PWM |
| GPIO17 | SCK | — | SPI |
| GPIO35 | MOSI | — | SPI |
| GPIO37 | MISO | — | SPI |
| GPIO43 | TX | — | UART |
| GPIO44 | RX | — | UART |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5029&ref=openhardware.directory&product=tinys2-esp32-s2&source=md-export) — 18.5

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Funexpectedmaker_tinys2%2F&ref=openhardware.directory&product=tinys2-esp32-s2&source=md-export)
- [Arduino](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FUnexpectedMaker%2Fesp32s2&ref=openhardware.directory&product=tinys2-esp32-s2&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5029&ref=openhardware.directory&product=tinys2-esp32-s2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FUnexpectedMaker%2Ftinys2&ref=openhardware.directory&product=tinys2-esp32-s2&source=md-export)
- [manufacturer](https://openhardware.directory/r?to=https%3A%2F%2Funexpectedmaker.com%2Ftinys2&ref=openhardware.directory&product=tinys2-esp32-s2&source=md-export)

## Tags

`esp32-s2`, `unexpected-maker`, `tinys2`, `tiny`, `native-usb`, `circuitpython`, `wifi`, `lipo`

---
[View full device page](https://openhardware.directory/s/1370/tinys2-esp32-s2)

---

# Pycom SiPy

> ESP32-based MicroPython development board with WiFi, Bluetooth LE, and +22dBm SigFox radio (RCZ2/RCZ4). Breadboard-compatible with ultra-low power modes, ideal for long-range sub-GHz IoT deployments.

## Quick Facts

- **Brand:** Pycom
- **Board Type:** dev-board
- **Price:** ~$54.95
- **CPU:** Espressif ESP32 dual-core Xtensa LX6
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **Power:** 3.3V-5.5V via pin headers or Pycom expansion board
- **Dimensions:** 55.1mm × 20.3mm × 9.6mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- micropython

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 SoC at 240 MHz with integrated 802.11 b/g/n WiFi and Bluetooth 4.2/BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=pycom-sipy&source=md-export)
- **AX-SFEU SigFox Module** (wireless-module): SigFox-certified radio module with +22dBm output power supporting RCZ2/RCZ4 frequency regions. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3534%2FSiPy_specs.pdf&ref=openhardware.directory&product=pycom-sipy&source=md-export)

## Protocols

- **I2C**: SDA=P9, SCL=P10
- **SPI**: MOSI=P10, MISO=P11, SCK=P12
- **UART**: TX=P1, RX=P0
- **WiFi**
- **Bluetooth**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| P0 | RX | — | digital-input, digital-output |
| P1 | TX | — | digital-input, digital-output |
| P2 | GPIO | — | digital-input, digital-output |
| P3 | GPIO | — | digital-input, digital-output |
| P4 | GPIO | — | digital-input, digital-output |
| P6 | GPIO | — | digital-input, digital-output |
| P7 | GPIO | — | digital-input, digital-output |
| P8 | GPIO | — | digital-input, digital-output |
| P9 | SDA | — | digital-input, digital-output |
| P10 | SCL/MOSI | — | digital-input, digital-output |
| P11 | MISO | — | digital-input, digital-output |
| P12 | SCK | — | digital-input, digital-output |
| P13 | GPIO | — | digital-input, digital-output |
| P14 | GPIO | — | digital-input, digital-output |
| P15 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P16 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P17 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P18 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P19 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P20 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P21 | GPIO | — | digital-input, digital-output |
| P22 | GPIO | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3534&ref=openhardware.directory&product=pycom-sipy&source=md-export) — 54.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3534&ref=openhardware.directory&product=pycom-sipy&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3534&ref=openhardware.directory&product=pycom-sipy&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.pycom.io%2Fdatasheets%2Fdevelopment%2Fsipy%2F&ref=openhardware.directory&product=pycom-sipy&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3534%2FSiPy_specs.pdf&ref=openhardware.directory&product=pycom-sipy&source=md-export)
- [pinout](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3534%2FSiPy_S01_OEM_module_pinout.pdf&ref=openhardware.directory&product=pycom-sipy&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fpycom%2Fpycom-micropython-sigfox&ref=openhardware.directory&product=pycom-sipy&source=md-export)

## Tags

`sigfox`, `esp32`, `micropython`, `wifi`, `ble`, `iot`, `pycom`, `sub-ghz`, `lpwan`

## Certifications

FCC, CE, RoHS

---
[View full device page](https://openhardware.directory/s/1370/pycom-sipy)

---

# Pycom LoPy4

> ESP32-based quad-network MicroPython board with WiFi, Bluetooth LE, LoRa (SX1276 868/915/433MHz), and SigFox. 4MB PSRAM, 8MB flash, 24 GPIO. Can function as a nano LoRa gateway. FCC/CE certified.

## Quick Facts

- **Brand:** Pycom
- **Board Type:** dev-board
- **Price:** ~$49.95
- **CPU:** Espressif ESP32 dual-core Xtensa LX6
- **RAM:** 4 MB
- **Flash:** 8 MB
- **GPIO:** 24 pins
- **Power:** 3.3V-5.5V via pin headers or Pycom expansion board
- **Dimensions:** 55mm × 20mm × 3.5mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- micropython

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 at 240 MHz with integrated 802.11 b/g/n WiFi and Bluetooth 4.2/BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=pycom-lopy4&source=md-export)
- **Semtech SX1276** (radio): LoRa/FSK transceiver supporting LoRaWAN Class A & C at 868/915/433MHz and SigFox multi-region. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.my.salesforce.com%2Fsfc%2Fp%2F%23E0000000JelG%2Fa%2F2R000000HSSi%2F71Zf0o7wgdTx3S7PpPOxgLDCVPAezDcnMlE4a2eZ9_k&ref=openhardware.directory&product=pycom-lopy4&source=md-export)

## Protocols

- **I2C**: SDA=P9, SCL=P10
- **SPI**: MOSI=P10, MISO=P11, SCK=P12
- **UART**: TX=P1, RX=P0
- **WiFi**
- **Bluetooth**
- **LoRa**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| P0 | RX | — | digital-input, digital-output |
| P1 | TX | — | digital-input, digital-output |
| P2 | GPIO | — | digital-input, digital-output |
| P3 | GPIO | — | digital-input, digital-output |
| P4 | GPIO | — | digital-input, digital-output |
| P6 | GPIO | — | digital-input, digital-output |
| P7 | GPIO | — | digital-input, digital-output |
| P8 | GPIO | — | digital-input, digital-output |
| P9 | SDA | — | digital-input, digital-output |
| P10 | SCL/MOSI | — | digital-input, digital-output |
| P11 | MISO | — | digital-input, digital-output |
| P12 | SCK | — | digital-input, digital-output |
| P13 | GPIO | — | digital-input, digital-output |
| P14 | GPIO | — | digital-input, digital-output |
| P15 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P16 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P17 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P18 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P19 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P20 | GPIO/ADC | — | digital-input, digital-output, analog-input |
| P21 | GPIO | — | digital-input, digital-output |
| P22 | GPIO | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3689&ref=openhardware.directory&product=pycom-lopy4&source=md-export) — 49.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3689&ref=openhardware.directory&product=pycom-lopy4&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3689&ref=openhardware.directory&product=pycom-lopy4&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.pycom.io%2Fdatasheets%2Fdevelopment%2Flopy4%2F&ref=openhardware.directory&product=pycom-lopy4&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3689%2F3689_datasheet.pdf&ref=openhardware.directory&product=pycom-lopy4&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fpycom%2Fpycom-micropython-sigfox&ref=openhardware.directory&product=pycom-lopy4&source=md-export)

## Tags

`lora`, `lorawan`, `sigfox`, `esp32`, `micropython`, `wifi`, `ble`, `iot`, `pycom`, `lpwan`, `nano-gateway`

## Certifications

FCC, CE, RoHS

---
[View full device page](https://openhardware.directory/s/1370/pycom-lopy4)

---

# TinyS3 ESP32-S3 with u.FL

> Ultra-compact ESP32-S3 board by Unexpected Maker in TinyPICO form factor with u.FL external antenna connector, 8MB flash, 8MB PSRAM, LiPo charging, and dual-core 240 MHz.

## Quick Facts

- **Brand:** Unexpected Maker
- **Board Type:** dev-board
- **Price:** ~$20
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM
- **Flash:** 8 MB
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11b/g/n | Bluetooth 5.0 LE + Mesh

## Compatible Firmware

- circuitpython
- micropython
- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Dual-core Xtensa LX7 at 240 MHz, 512KB SRAM, Wi-Fi + BT5, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=tinys3-esp32-s3-ufl&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO35, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | D1 | — | digital, adc |
| GPIO2 | D2 | — | digital, adc |
| GPIO3 | SDA | — | i2c-sda, digital |
| GPIO4 | SCL | — | i2c-scl, digital |
| GPIO5 | D5 | — | digital, pwm |
| GPIO6 | D6 | — | digital, pwm |
| GPIO7 | D7 | — | digital, pwm |
| GPIO8 | D8 | — | digital, pwm |
| GPIO9 | D9 | — | digital, pwm |
| GPIO10 | D10 | — | digital, pwm |
| GPIO11 | D11 | — | digital |
| GPIO12 | D12 | — | digital |
| GPIO35 | MOSI | — | spi-mosi, digital |
| GPIO36 | MISO | — | spi-miso, digital |
| GPIO37 | SCK | — | spi-sck, digital |
| GPIO43 | TX | — | uart-tx, digital |
| GPIO44 | RX | — | uart-rx, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5747&ref=openhardware.directory&product=tinys3-esp32-s3-ufl&source=md-export) — 20

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Funexpectedmaker_tinys3%2F&ref=openhardware.directory&product=tinys3-esp32-s3-ufl&source=md-export)
- [Getting Started](https://openhardware.directory/r?to=https%3A%2F%2Fesp32s3.com%2Fgetting-started.html&ref=openhardware.directory&product=tinys3-esp32-s3-ufl&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5747&ref=openhardware.directory&product=tinys3-esp32-s3-ufl&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Funexpectedmaker%2Fesp32s3&ref=openhardware.directory&product=tinys3-esp32-s3-ufl&source=md-export)
- [schematic](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5747%2Fschematic-tinys3.pdf&ref=openhardware.directory&product=tinys3-esp32-s3-ufl&source=md-export)

## Tags

`unexpected-maker`, `esp32-s3`, `tiny`, `ufl`, `external-antenna`, `circuitpython`, `lipo`, `psram`

---
[View full device page](https://openhardware.directory/s/1370/tinys3-esp32-s3-ufl)

---

# FeatherS3 ESP32-S3 with u.FL

> Unexpected Maker's pro ESP32-S3 Feather board with u.FL external antenna connector, 16MB flash, 8MB PSRAM, dual STEMMA QT connectors, LiPo charging, and dual 700mA regulators.

## Quick Facts

- **Brand:** Unexpected Maker
- **Board Type:** feather
- **Price:** ~$27.5
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11b/g/n | Bluetooth 5.0 LE + Mesh

## Compatible Firmware

- circuitpython
- micropython
- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Dual-core Xtensa LX7 at 240 MHz, 512KB SRAM, Wi-Fi + BT5, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=feathers3-esp32-s3-ufl&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO35, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | D1 | — | digital, adc |
| GPIO2 | D2 | — | digital, adc |
| GPIO3 | SDA | — | i2c-sda, digital |
| GPIO4 | SCL | — | i2c-scl, digital |
| GPIO5 | D5 | — | digital, pwm |
| GPIO6 | D6 | — | digital, pwm |
| GPIO9 | D9 | — | digital, pwm |
| GPIO10 | D10 | — | digital, pwm |
| GPIO11 | D11 | — | digital |
| GPIO12 | D12 | — | digital |
| GPIO13 | D13 | — | digital |
| GPIO14 | A2 | — | analog, digital |
| GPIO15 | A3 | — | analog, digital |
| GPIO16 | A4 | — | analog, digital |
| GPIO17 | A0 | — | analog, digital |
| GPIO18 | A1 | — | analog, digital |
| GPIO35 | MOSI | — | spi-mosi, digital |
| GPIO36 | MISO | — | spi-miso, digital |
| GPIO37 | SCK | — | spi-sck, digital |
| GPIO43 | TX | — | uart-tx, digital |
| GPIO44 | RX | — | uart-rx, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5748&ref=openhardware.directory&product=feathers3-esp32-s3-ufl&source=md-export) — 27.5

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Funexpectedmaker_feather3%2F&ref=openhardware.directory&product=feathers3-esp32-s3-ufl&source=md-export)
- [Getting Started](https://openhardware.directory/r?to=https%3A%2F%2Fesp32s3.com%2Fgetting-started.html&ref=openhardware.directory&product=feathers3-esp32-s3-ufl&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5748&ref=openhardware.directory&product=feathers3-esp32-s3-ufl&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Funexpectedmaker%2Fesp32s3&ref=openhardware.directory&product=feathers3-esp32-s3-ufl&source=md-export)

## Tags

`unexpected-maker`, `feather`, `esp32-s3`, `ufl`, `external-antenna`, `circuitpython`, `psram`, `featherwing`

---
[View full device page](https://openhardware.directory/s/1370/feathers3-esp32-s3-ufl)

---

# ESP32-S3-DevKitM-1

> Espressif official ESP32-S3 development board using the compact ESP32-S3-MINI-1 module, with dual-core 240 MHz LX7, 8 MB flash, up to 45 GPIO, dual USB ports, and smaller footprint than the WROOM-1.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$15.95
- **CPU:** Xtensa LX7 dual-core @ 240 MHz (ESP32-S3)
- **RAM:** 512 KB SRAM
- **Flash:** 8MB
- **Power:** 5V via USB-C or header pins

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- esp-idf
- arduino
- micropython

## Components

- **ESP32-S3-MINI-1** (mcu): Espressif ESP32-S3-MINI-1 compact module with dual-core 240 MHz Xtensa LX7, 8 MB Flash, WiFi, and BLE 5, in a smaller package than WROOM-1. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-mini-1_mini-1u_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s3-devkitm-1&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO35, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**
- **CAN**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | GPIO1 | — | ADC, touch, GPIO |
| GPIO2 | GPIO2 | — | ADC, touch, GPIO |
| GPIO3 | GPIO3 | — | ADC, touch, GPIO |
| GPIO4 | GPIO4 | — | ADC, touch, GPIO |
| GPIO5 | GPIO5 | — | ADC, touch, GPIO |
| GPIO6 | GPIO6 | — | ADC, touch, GPIO |
| GPIO7 | GPIO7 | — | ADC, touch, GPIO |
| GPIO8 | GPIO8 | — | ADC, touch, GPIO |
| GPIO9 | GPIO9 | — | ADC, touch, GPIO |
| GPIO10 | GPIO10 | — | ADC, touch, GPIO |
| GPIO35 | MOSI | — | SPI, GPIO |
| GPIO36 | MISO | — | SPI, GPIO |
| GPIO37 | SCK | — | SPI, GPIO |
| GPIO43 | TX | — | UART, GPIO |
| GPIO44 | RX | — | UART, GPIO |
| GPIO48 | RGB_LED | — | GPIO |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5311&ref=openhardware.directory&product=esp32-s3-devkitm-1&source=md-export) — 15.95

## Available Software

- [ESP-IDF](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.espressif.com%2Fprojects%2Fesp-idf%2F&ref=openhardware.directory&product=esp32-s3-devkitm-1&source=md-export)
- [Arduino ESP32](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Farduino-esp32&ref=openhardware.directory&product=esp32-s3-devkitm-1&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5311&ref=openhardware.directory&product=esp32-s3-devkitm-1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp32-s3&ref=openhardware.directory&product=esp32-s3-devkitm-1&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s3-devkitm-1&source=md-export)

## Tags

`esp32-s3`, `devkitm`, `espressif`, `esp-idf`, `wifi`, `ble`, `mini-module`

---
[View full device page](https://openhardware.directory/s/1370/esp32-s3-devkitm-1)

---

# TinyS3 ESP32-S3

> Ultra-compact ESP32-S3 dev board by Unexpected Maker in the TinyPICO form factor — dual-core 240 MHz LX7, 8 MB Flash, 8 MB PSRAM, WiFi, BLE 5, 17 GPIO, LiPo charging at 35 × 17.8 mm.

## Quick Facts

- **Brand:** Unexpected Maker
- **Board Type:** dev-board
- **Price:** ~$20
- **CPU:** Xtensa LX7 dual-core @ 240 MHz (ESP32-S3)
- **RAM:** 512 KB SRAM + 8 MB PSRAM
- **Flash:** 8MB
- **Power:** 5V + LiPo
- **Dimensions:** 35 × 17.8 mm

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth Bluetooth 5.0 + Mesh

## Compatible Firmware

- circuitpython
- micropython
- arduino
- esp-idf

## Components

- **ESP32-S3FN8** (mcu): Espressif ESP32-S3FN8 dual-core 240 MHz Xtensa LX7 with 8 MB embedded Flash, WiFi, BLE 5, and vector AI instructions. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=tinys3-esp32-s3&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO11, MISO=GPIO12, SCK=GPIO13
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | D1 | — | ADC, GPIO, touch |
| GPIO2 | D2 | — | ADC, GPIO, touch |
| GPIO3 | SDA | — | I2C, ADC, touch |
| GPIO4 | SCL | — | I2C, ADC, touch |
| GPIO5 | D5 | — | ADC, GPIO, touch |
| GPIO6 | D6 | — | ADC, GPIO, touch |
| GPIO7 | D7 | — | ADC, GPIO, touch |
| GPIO8 | D8 | — | ADC, GPIO, touch |
| GPIO9 | D9 | — | ADC, GPIO, touch |
| GPIO10 | D10 | — | ADC, GPIO, touch |
| GPIO11 | MOSI | — | SPI, GPIO |
| GPIO12 | MISO | — | SPI, GPIO |
| GPIO13 | SCK | — | SPI, GPIO |
| GPIO43 | TX | — | UART |
| GPIO44 | RX | — | UART |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5398&ref=openhardware.directory&product=tinys3-esp32-s3&source=md-export) — 20

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Funexpectedmaker_tinys3%2F&ref=openhardware.directory&product=tinys3-esp32-s3&source=md-export)
- [Arduino ESP32](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Farduino-esp32&ref=openhardware.directory&product=tinys3-esp32-s3&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5398&ref=openhardware.directory&product=tinys3-esp32-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FUnexpectedMaker%2Ftinys3&ref=openhardware.directory&product=tinys3-esp32-s3&source=md-export)
- [manufacturer](https://openhardware.directory/r?to=https%3A%2F%2Funexpectedmaker.com%2Ftinys3&ref=openhardware.directory&product=tinys3-esp32-s3&source=md-export)

## Tags

`esp32-s3`, `unexpected-maker`, `tinys3`, `tiny`, `circuitpython`, `wifi`, `ble`, `lipo`, `psram`

---
[View full device page](https://openhardware.directory/s/1370/tinys3-esp32-s3)

---

# ProS3 ESP32-S3

> Unexpected Maker's ultimate ESP32-S3 dev board — dual-core 240 MHz LX7, 16 MB Flash, 8 MB PSRAM, WiFi, BLE 5, 27 GPIO, 2× LDOs, castellated headers, STEMMA, LiPo charging, JTAG.

## Quick Facts

- **Brand:** Unexpected Maker
- **Board Type:** dev-board
- **Price:** ~$29.95
- **CPU:** Xtensa LX7 dual-core @ 240 MHz (ESP32-S3)
- **RAM:** 512 KB SRAM + 8 MB PSRAM
- **Flash:** 16MB
- **Power:** 5V + LiPo

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth Bluetooth 5.0 + Mesh

## Compatible Firmware

- circuitpython
- micropython
- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core 240 MHz Xtensa LX7 with 512 KB SRAM, WiFi, BLE 5, native USB, JTAG, and vector AI instructions. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=pros3-esp32-s3&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO11, MISO=GPIO12, SCK=GPIO13
- **UART**: TX=GPIO43, RX=GPIO44
- **USB**
- **JTAG**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | D1 | — | ADC, GPIO, touch |
| GPIO2 | D2 | — | ADC, GPIO, touch |
| GPIO3 | SDA | — | I2C, ADC, touch |
| GPIO4 | SCL | — | I2C, ADC, touch |
| GPIO5 | D5 | — | ADC, GPIO, touch |
| GPIO6 | D6 | — | ADC, GPIO, touch |
| GPIO7 | D7 | — | ADC, GPIO, touch |
| GPIO8 | D8 | — | ADC, GPIO, touch |
| GPIO9 | D9 | — | ADC, GPIO, touch |
| GPIO10 | D10 | — | ADC, GPIO, touch |
| GPIO11 | MOSI | — | SPI, GPIO |
| GPIO12 | MISO | — | SPI, GPIO |
| GPIO13 | SCK | — | SPI, GPIO |
| GPIO36 | D36 | — | GPIO |
| GPIO37 | D37 | — | GPIO |
| GPIO38 | D38 | — | GPIO |
| GPIO43 | TX | — | UART |
| GPIO44 | RX | — | UART |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5401&ref=openhardware.directory&product=pros3-esp32-s3&source=md-export) — 29.95

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Funexpectedmaker_pros3%2F&ref=openhardware.directory&product=pros3-esp32-s3&source=md-export)
- [Arduino ESP32](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Farduino-esp32&ref=openhardware.directory&product=pros3-esp32-s3&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5401&ref=openhardware.directory&product=pros3-esp32-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FUnexpectedMaker%2Fpros3&ref=openhardware.directory&product=pros3-esp32-s3&source=md-export)
- [manufacturer](https://openhardware.directory/r?to=https%3A%2F%2Funexpectedmaker.com%2Fpros3&ref=openhardware.directory&product=pros3-esp32-s3&source=md-export)

## Tags

`esp32-s3`, `unexpected-maker`, `pros3`, `circuitpython`, `wifi`, `ble`, `psram`, `lipo`, `castellated`, `jtag`

---
[View full device page](https://openhardware.directory/s/1370/pros3-esp32-s3)

---

# Adafruit HUZZAH32 ESP32 Feather Board

> Adafruit's Feather-format ESP32 board with dual-core Xtensa LX6 @ 240MHz, WiFi b/g/n, Bluetooth Classic + BLE 4.2, built-in LiPo charger, and Feather-compatible pin layout. Great all-around wireless IoT platform.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$19.95
- **CPU:** Xtensa LX6 dual-core @ 240MHz (ESP32)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **Power:** 5V via Micro-USB or 3.7V LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth Classic + BLE 4.2

## Compatible Firmware

- esp-idf
- arduino
- micropython
- esphome
- tasmota
- circuitpython

## Components

- **ESP32-WROOM-32** (mcu): ESP32-WROOM-32 module with dual-core Xtensa LX6 at 240MHz, 520KB SRAM, 4MB flash, WiFi b/g/n, Bluetooth Classic + BLE 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-huzzah32-esp32-feather&source=md-export)
- **MCP73831** (battery-charger): MCP73831 single-cell LiPo/Li-Ion charge management IC providing 100mA charge current with status indicator LED — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F20001984g.pdf&ref=openhardware.directory&product=adafruit-huzzah32-esp32-feather&source=md-export)

## Protocols

- **I2C**: SDA=GPIO23, SCL=GPIO22
- **SPI**: MOSI=GPIO18, MISO=GPIO19, SCK=GPIO5
- **UART**: TX=GPIO1, RX=GPIO3
- **PWM**
- **ADC**: A0=GPIO26, A1=GPIO25, A2=GPIO34, A3=GPIO39, A4=GPIO36, A5=GPIO4

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO26 | A0 — ADC | — | adc, digital-input, digital-output, pwm |
| GPIO25 | A1 — ADC / D25 | — | adc, digital-input, digital-output, pwm |
| GPIO34 | A2 — ADC (input-only) | — | adc, input-only |
| GPIO39 | A3 — ADC (input-only) | — | adc, input-only |
| GPIO36 | A4 — ADC (input-only) | — | adc, input-only |
| GPIO4 | A5 — ADC / D4 | — | adc, digital-input, digital-output, pwm |
| GPIO1 | TX — UART | — | digital-input, digital-output, pwm |
| GPIO3 | RX — UART | — | digital-input, digital-output, pwm |
| GPIO5 | D5 / SPI SCK | — | digital-input, digital-output, pwm |
| GPIO12 | D12 | — | digital-input, digital-output, pwm |
| GPIO13 | D13 | — | digital-input, digital-output, pwm |
| GPIO14 | D14 | — | digital-input, digital-output, pwm |
| GPIO15 | D15 | — | digital-input, digital-output, pwm |
| GPIO16 | D16 | — | digital-input, digital-output, pwm |
| GPIO17 | D17 | — | digital-input, digital-output, pwm |
| GPIO18 | D18 / SPI SCK | — | digital-input, digital-output, pwm |
| GPIO19 | D19 / SPI MISO | — | digital-input, digital-output, pwm |
| GPIO21 | D21 | — | digital-input, digital-output, pwm |
| GPIO22 | D22 / I2C SCL | — | digital-input, digital-output, pwm |
| GPIO23 | D23 / I2C SDA | — | digital-input, digital-output, pwm |
| GPIO27 | D27 | — | digital-input, digital-output, pwm |
| GPIO32 | D32 | — | digital-input, digital-output, pwm |
| GPIO33 | D33 | — | digital-input, digital-output, pwm |

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3405&ref=openhardware.directory&product=adafruit-huzzah32-esp32-feather&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-HUZZAH32-ESP32-Feather-PCB&ref=openhardware.directory&product=adafruit-huzzah32-esp32-feather&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-huzzah32-esp32-feather&ref=openhardware.directory&product=adafruit-huzzah32-esp32-feather&source=md-export)

## Tags

`esp32`, `feather`, `wifi`, `bluetooth`, `ble`, `lipo-charger`, `adafruit`, `xtensa`, `dual-core`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-huzzah32-esp32-feather)

---

# Heltec Wireless Paper

> ESP32-S3 + SX1262 LoRa E-Ink development board with 2.13" e-paper display, WiFi, BLE 5.0, and LoRa connectivity. Designed for electronic shelf labels, Meshtastic mesh nodes, and low-power IoT sensor displays.

## Quick Facts

- **Brand:** Heltec
- **Price:** ~$15.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, vector instructions
- **RAM:** 512KB SRAM
- **Flash:** 8MB (integrated)
- **USB:** USB-C (USB-to-UART bridge)
- **Power:** 5V via USB-C,3.7V LiPo battery
- **Dimensions:** 72 × 30mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-S3FN8** (mcu): Espressif ESP32-S3 SoC with dual-core Xtensa LX7 processor at 240MHz, integrated 8MB flash, WiFi 802.11 b/g/n, BLE 5.0, 12-bit SAR ADC (20 channels), 14 capacitive touch inputs, and hardware crypto acceleration (AES/SHA/RSA). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-wireless-paper&source=md-export)
- **sx1262** (radio): Semtech SX1262 LoRa transceiver supporting 150-960MHz frequency range with +22dBm transmit power, ultra-low 4.2mA receive current, and LoRa/FSK modulation for long-range LPWAN communication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F6%2Fb%2F5%2F1%2F4%2FSX1262_datasheet.pdf&ref=openhardware.directory&product=heltec-wireless-paper&source=md-export)
- **DEPG0213BN** (display-driver): Good Display DEPG0213BN 2.13-inch e-paper panel with 250x122 pixel resolution, ultra-low power consumption, and 180-day image retention without power. Driven via SPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Paper%2FE-Ink%2520Datasheet&ref=openhardware.directory&product=heltec-wireless-paper&source=md-export)

## Protocols

- **SPI (LoRa)** (SPI0): SCK=GPIO9, MOSI=GPIO10, MISO=GPIO11, CS=GPIO8
- **SPI (E-Ink Display)** (SPI1): SCLK=GPIO3, MOSI=GPIO2, CS=GPIO4, DC=GPIO5, RES=GPIO6, BUSY=GPIO7
- **I2C**: SDA=GPIO41, SCL=GPIO42
- **UART**: TX=GPIO43, RX=GPIO44
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot Button (BUTTON_PIN) | — | digital-input, digital-output, strapping |
| GPIO1 | A0 — Analog Input | — | adc, digital-input, digital-output, pwm, touch |
| GPIO2 | E-Ink MOSI | — | digital-input, digital-output, pwm, adc, touch |
| GPIO3 | E-Ink SCLK | — | digital-input, digital-output, pwm, adc, touch |
| GPIO4 | E-Ink CS | — | digital-input, digital-output, pwm, adc, touch |
| GPIO5 | E-Ink DC | — | digital-input, digital-output, pwm, adc, touch |
| GPIO6 | E-Ink RES | — | digital-input, digital-output, pwm, adc, touch |
| GPIO7 | E-Ink BUSY | — | digital-input, digital-output, pwm, adc |
| GPIO8 | LoRa CS (SPI SS) | — | digital-input, digital-output, pwm, adc |
| GPIO9 | SPI SCK (LoRa) | — | digital-input, digital-output, pwm, adc |
| GPIO10 | SPI MOSI (LoRa) | — | digital-input, digital-output, pwm, adc |
| GPIO11 | SPI MISO (LoRa) | — | digital-input, digital-output, pwm, adc |
| GPIO12 | LoRa RESET | — | digital-input, digital-output, pwm, adc |
| GPIO13 | LoRa BUSY (DIO2) | — | digital-input, digital-output, pwm, adc |
| GPIO14 | LoRa DIO1 (IRQ) | — | digital-input, digital-output, pwm, adc, touch |
| GPIO18 | LED Power Control | — | digital-input, digital-output, pwm |
| GPIO19 | ADC Control (ADC_CTRL) | — | digital-input, digital-output, pwm |
| GPIO20 | Battery Voltage ADC | — | adc, digital-input, digital-output |
| GPIO41 | I2C SDA | — | digital-input, digital-output, pwm |
| GPIO42 | I2C SCL | — | digital-input, digital-output, pwm |
| GPIO43 | UART TX | — | digital-input, digital-output, pwm |
| GPIO44 | UART RX | — | digital-input, digital-output, pwm |
| GPIO45 | Vext Enable (Active Low — E-Ink Power) | — | digital-input, digital-output, strapping |

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwireless-paper%2F&ref=openhardware.directory&product=heltec-wireless-paper&source=md-export) — 15.90
- [AliExpress (Heltec Store)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2F1005007747207784.html&ref=openhardware.directory&product=heltec-wireless-paper&source=md-export) — 15.90
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-Meshtastic-2-13-Inch-Electronic-902-928MHz%2Fdp%2FB0D22K2SRL&ref=openhardware.directory&product=heltec-wireless-paper&source=md-export) — 22.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwireless-paper%2F&ref=openhardware.directory&product=heltec-wireless-paper&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltec_ESP32&ref=openhardware.directory&product=heltec-wireless-paper&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fesp32-series%2Flora-32%2Fwireless-paper%2F&ref=openhardware.directory&product=heltec-wireless-paper&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Paper%2FWireless-Paper.pdf&ref=openhardware.directory&product=heltec-wireless-paper&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Paper%2FWireless_Paper_V0.4_Schematic_Diagram.pdf&ref=openhardware.directory&product=heltec-wireless-paper&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/heltec-wireless-paper)

---

# LILYGO T-Watch S3 Plus

> ESP32-S3 smartwatch dev board with LoRa SX1262, GNSS, BMA423 accelerometer, MAX98357A audio, DRV2605 haptic feedback, AXP2101 PMIC, and 940mAh battery for wearable LoRa projects.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$58.74
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- micropython
- meshtastic

## Components

- **ESP32-S3** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-watch-s3-plus&source=md-export)
- **SX1262** (radio): Long-range LoRa transceiver covering 150–960 MHz with +22 dBm output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-watch-s3-plus&source=md-export)
- **BMA423** (accelerometer): 3-axis accelerometer with step counter, activity recognition, and wrist-tilt detection for smartwatch applications. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bma423-ds000.pdf&ref=openhardware.directory&product=lilygo-t-watch-s3-plus&source=md-export)
- **MAX98357A** (audio-amplifier): Filterless 3.2W Class D amplifier with I2S interface for speaker audio output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX98357A-MAX98357B.pdf&ref=openhardware.directory&product=lilygo-t-watch-s3-plus&source=md-export)
- **DRV2605** (haptic): I2C haptic motor driver with 123 built-in waveforms for ERM and LRA actuators. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fdrv2605.pdf&ref=openhardware.directory&product=lilygo-t-watch-s3-plus&source=md-export)
- **AXP2101** (battery-charger): Advanced PMIC with multi-rail LDO outputs, LiPo charging, and fuel gauge. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Watch-S3-Plus&ref=openhardware.directory&product=lilygo-t-watch-s3-plus&source=md-export)

## Protocols

- **SPI**: CLK=GPIO3, MOSI=GPIO1, MISO=GPIO4
- **I2C**: SDA=GPIO10, SCL=GPIO11
- **I2S**: BCLK=GPIO44, WS=GPIO43, DOUT=GPIO45

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO10 | I2C SDA | — | digital-input, digital-output |
| GPIO11 | I2C SCL | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-watch-s3-plus&ref=openhardware.directory&product=lilygo-t-watch-s3-plus&source=md-export) — $58.74

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-watch-s3-plus&ref=openhardware.directory&product=lilygo-t-watch-s3-plus&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Watch-S3-Plus&ref=openhardware.directory&product=lilygo-t-watch-s3-plus&source=md-export)

## Tags

`esp32-s3`, `smartwatch`, `lora`, `gps`, `meshtastic`, `haptic`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-watch-s3-plus)

---

# LILYGO T-Wrist E-Paper

> LILYGO T-Wrist E-Paper is an ESP32-based wearable development board with a 1.54-inch 200×200 e-paper display, vibration motor, optional GPS (LG77 GNSS), WiFi, Bluetooth 4.2, and 3D-printable watch shell.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$12.86
- **CPU:** Xtensa LX6 dual-core @ 240MHz
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** None (requires T-U2T adapter)
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- platformio

## Components

- **ESP32-WROOM-32** (mcu): Espressif ESP32-WROOM-32 module with dual-core Xtensa LX6 at 240MHz, integrated WiFi 802.11 b/g/n and Bluetooth 4.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-wrist-e-paper&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **I2S**
- **CAN**
- **SDIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-wrist-e-paper-1-54-inch-display&ref=openhardware.directory&product=lilygo-t-wrist-e-paper&source=md-export) — $12.86

## Available Software

- [GxEPD2](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FZinggJM%2FGxEPD2&ref=openhardware.directory&product=lilygo-t-wrist-e-paper&source=md-export)
- [LilyGo T-Wristband](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Wristband&ref=openhardware.directory&product=lilygo-t-wrist-e-paper&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-wrist-e-paper-1-54-inch-display&ref=openhardware.directory&product=lilygo-t-wrist-e-paper&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Wristband&ref=openhardware.directory&product=lilygo-t-wrist-e-paper&source=md-export)

## Tags

`e-paper`, `e-ink`, `esp32`, `wearable`, `smartwatch`, `gps`, `gnss`, `vibration-motor`, `1.54-inch`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-wrist-e-paper)

---

# ESP32-CAM

> ESP32-based camera dev board with OV2640 2MP sensor, microSD slot, WiFi, Bluetooth, 4MB flash, and 520KB SRAM. Ideal for DIY security cameras, timelapse, and computer vision projects.

## Quick Facts

- **Brand:** AI-Thinker
- **Board Type:** dev-board
- **Price:** ~$9.95
- **CPU:** ESP32-S
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **GPIO:** 10 pins
- **Power:** 5V via pin header

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf
- micropython
- esphome
- tasmota

## Components

- **ESP32-S** (mcu): Dual-core Xtensa LX6 microcontroller at 240 MHz with WiFi and Bluetooth 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=esp32-cam&source=md-export)
- **OV2640** (sensor): 2-megapixel CMOS image sensor supporting JPEG, BMP, and grayscale output up to 1600x1200 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2Fcam_module%2FOV2640DS.pdf&ref=openhardware.directory&product=esp32-cam&source=md-export)
- **MicroSD Slot** (storage): MicroSD card slot for local image and video storage up to 4GB — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=esp32-cam&source=md-export)
- **LED Flash** (led): Bright white LED flash for low-light camera operation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=esp32-cam&source=md-export)

## Protocols

- **UART**
- **I2C**
- **SPI**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fesp32cam&ref=openhardware.directory&product=esp32-cam&source=md-export) — $9.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fesp32cam&ref=openhardware.directory&product=esp32-cam&source=md-export)

## Tags

`esp32`, `camera`, `ov2640`, `ai-thinker`, `iot`, `computer-vision`, `security-camera`

---
[View full device page](https://openhardware.directory/s/1370/esp32-cam)

---

# OpenEPaperLink Access Point C6+S3

> Open-source dual-MCU access point for wirelessly managing e-paper tags. ESP32-C6 handles WiFi connectivity while ESP32-S3 serves as a 2.4GHz RF transceiver for IEEE 802.15.4 communication with electronic shelf labels.

## Quick Facts

- **Brand:** OpenEPaperLink
- **Board Type:** access-point
- **Price:** ~$55
- **CPU:** ESP32-C6 RISC-V @ 160MHz + ESP32-S3 Xtensa LX7 dual-core @ 240MHz
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.0

## Compatible Firmware

- openepaperlink
- esp-idf

## Components

- **ESP32-C6** (mcu): Espressif ESP32-C6 RISC-V single-core at 160MHz providing WiFi 6 (802.11ax), BLE 5.0, and IEEE 802.15.4 connectivity. Runs the main OpenEPaperLink access point firmware and web interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=openepaperlink-access-point-c6-s3&source=md-export)
- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core Xtensa LX7 at 240MHz repurposed as a dedicated 2.4GHz RF transceiver for IEEE 802.15.4 communication with e-paper tags. Handles the low-level RF protocol for tag data transfer. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=openepaperlink-access-point-c6-s3&source=md-export)

## Protocols

- **IEEE 802.15.4**
- **UART**
- **SPI**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** CC-BY-NC-SA-4.0

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fismet%2Fopenepaperlink-access-point-c6s3%2F&ref=openhardware.directory&product=openepaperlink-access-point-c6-s3&source=md-export) — $55.00

## Available Software

- [OpenEPaperLink](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FOpenEPaperLink%2FOpenEPaperLink&ref=openhardware.directory&product=openepaperlink-access-point-c6-s3&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fismet%2Fopenepaperlink-access-point-c6s3%2F&ref=openhardware.directory&product=openepaperlink-access-point-c6-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FOpenEPaperLink%2FOpenEPaperLink&ref=openhardware.directory&product=openepaperlink-access-point-c6-s3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FOpenEPaperLink%2FOpenEPaperLink%2Fwiki&ref=openhardware.directory&product=openepaperlink-access-point-c6-s3&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FOpenEPaperLink%2FOpenEPaperLink%2Ftree%2Fmain%2FHardware&ref=openhardware.directory&product=openepaperlink-access-point-c6-s3&source=md-export)

## Tags

`openepaperlink`, `e-paper`, `electronic-shelf-labels`, `esp32-c6`, `esp32-s3`, `access-point`, `ieee-802-15-4`, `smart-home`, `iot`, `open-source-hardware`

---
[View full device page](https://openhardware.directory/s/1370/openepaperlink-access-point-c6-s3)

---

# CircuitMess NASA Mars Perseverance Rover

> NASA-themed DIY robotics kit with ESP32-S3, camera, dual DC motors, 3 servos, and WiFi/BLE. Build a programmable Mars Rover replica with robotic arm and live video feed.

## Quick Facts

- **Brand:** circuitmess
- **Board Type:** robotics-kit
- **Price:** ~$435
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** Battery pack

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core Xtensa LX7 at 240MHz with WiFi, BLE 5.0, PSRAM, and 4MB flash. Handles motor control, camera streaming, and wireless communication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=circuitmess-nasa-mars-perseverance-rover&source=md-export)
- **OV2640** (camera): OV2640 camera module with DVP parallel interface for live video streaming via WiFi. Supports QQVGA to UXGA resolution in JPEG and RGB formats. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2Fcam_module%2FOV2640DS.pdf&ref=openhardware.directory&product=circuitmess-nasa-mars-perseverance-rover&source=md-export)
- **AW9523** (io-expander): Awinic AW9523 I2C GPIO expander controlling status LEDs, camera LED, motor LEDs, and speaker enable across 16 programmable pins. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.awinic.com%2FUploads%2F2024-08-07%2F66b2e75a22afd.pdf&ref=openhardware.directory&product=circuitmess-nasa-mars-perseverance-rover&source=md-export)
- **TCA9555** (io-expander): Texas Instruments TCA9555 I2C GPIO expander handling module addressing and detection for the rover's expansion system. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftca9555.pdf&ref=openhardware.directory&product=circuitmess-nasa-mars-perseverance-rover&source=md-export)

## Protocols

- **I2C**: SDA=GPIO11, SCL=GPIO10
- **I2S**: BCLK=GPIO1, LRCLK=GPIO3, DOUT=GPIO0
- **DVP Camera**: XCLK=GPIO33, PCLK=GPIO47, VSYNC=GPIO35, HREF=GPIO34, PWDN=GPIO36, D0-D7=GPIO41-37,42,44,43

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO6 | Battery ADC | — | adc |
| GPIO11 | I2C SDA | — | digital-input, digital-output |
| GPIO10 | I2C SCL | — | digital-input, digital-output |
| GPIO13 | Motor Left A | — | digital-output, pwm |
| GPIO12 | Motor Left B | — | digital-output |
| GPIO15 | Motor Right A | — | digital-output, pwm |
| GPIO14 | Motor Right B | — | digital-output |
| GPIO16 | Servo 1 PWM | — | digital-output, pwm |
| GPIO17 | Servo 2 PWM | — | digital-output, pwm |
| GPIO18 | Servo 3 PWM | — | digital-output, pwm |
| GPIO1 | I2S BCLK | — | digital-output |
| GPIO3 | I2S LRCLK | — | digital-output |
| GPIO0 | I2S DOUT | — | digital-output |
| GPIO33 | Camera XCLK | — | digital-output |
| GPIO47 | Camera PCLK | — | digital-input |
| GPIO35 | Camera VSYNC | — | digital-input |
| GPIO34 | Camera HREF | — | digital-input |
| GPIO36 | Camera PWDN | — | digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [CircuitMess](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitmess.com%2Fproducts%2Fnasa-mars-perseverance-rover&ref=openhardware.directory&product=circuitmess-nasa-mars-perseverance-rover&source=md-export) — €399.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitmess.com%2Fproducts%2Fnasa-mars-perseverance-rover&ref=openhardware.directory&product=circuitmess-nasa-mars-perseverance-rover&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FCircuitMess%2FPerse_Rover-Firmware&ref=openhardware.directory&product=circuitmess-nasa-mars-perseverance-rover&source=md-export)

## Tags

`circuitmess`, `robotics`, `esp32-s3`, `nasa`, `rover`, `camera`, `stem`

---
[View full device page](https://openhardware.directory/s/1370/circuitmess-nasa-mars-perseverance-rover)

---

# Shelly Plus 2PM

> ESP32-based dual-relay WiFi/BLE smart switch with per-channel power monitoring via ADE7953, cover/shutter control mode, and 10A per channel. Flashable with Tasmota for local roller blind and dual light control.

## Quick Facts

- **Brand:** Shelly
- **Board Type:** relay-module
- **Price:** ~$21.99
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **Power:** 110-240V AC

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- Shelly OS
- tasmota
- esphome

## Components

- **ESP32** (Microcontroller): Dual-core Xtensa LX6 microcontroller at 240MHz with integrated WiFi 802.11 b/g/n and Bluetooth 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=shelly-plus-2pm&source=md-export)
- **2x 10A Relay** (Relay): Two independent single-pole relays each rated at 10A/240V AC for dual load switching or shutter motor control — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.shelly.com%2Fen%2Fproducts%2Fshop%2Fshelly-plus-2-pm&ref=openhardware.directory&product=shelly-plus-2pm&source=md-export)
- **ADE7953** (Sensor): High-accuracy energy metering IC providing per-channel voltage, current, active/reactive power, and energy measurement via SPI — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2Fade7953.pdf&ref=openhardware.directory&product=shelly-plus-2pm&source=md-export)
- **AC-DC Converter** (Power Supply): Integrated 110-240V AC to 3.3V DC converter powering the ESP32 and relay circuits — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.shelly.com%2Fen%2Fproducts%2Fshop%2Fshelly-plus-2-pm&ref=openhardware.directory&product=shelly-plus-2pm&source=md-export)

## Protocols

- **WiFi 802.11 b/g/n**
- **Bluetooth 4.2**
- **MQTT**
- **HTTP REST API**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.shelly.com%2Fen%2Fproducts%2Fshop%2Fshelly-plus-2-pm&ref=openhardware.directory&product=shelly-plus-2pm&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Ftemplates.blakadder.com%2Fshelly_plus_2PM.html&ref=openhardware.directory&product=shelly-plus-2pm&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Farendst%2FTasmota&ref=openhardware.directory&product=shelly-plus-2pm&source=md-export)

## Tags

`esp32`, `wifi`, `bluetooth`, `tasmota`, `esphome`, `relay`, `power-monitoring`, `shutter-control`, `home-automation`, `shelly`, `energy-meter`

## Certifications

CE, UL

---
[View full device page](https://openhardware.directory/s/1370/shelly-plus-2pm)

---

# WiFi LoRa 32 (V3)

> Compact ESP32-S3 + SX1262 LoRa development board with 0.96" OLED display, USB-C, and built-in LiPo charging. One of the primary boards for Meshtastic and LoRaWAN IoT projects.

## Quick Facts

- **Brand:** Heltec
- **Board Type:** dev-board
- **Price:** ~$17.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector instructions, hardware AES/SHA/RSA
- **RAM:** 512KB SRAM
- **Flash:** 8MB SiP
- **USB:** USB-C 2.0 (OTG + CP2102 UART bridge)
- **Power:** 5V via USB-C / 3.7V LiPo (SH1.25-2)
- **Dimensions:** 50.2 × 25.5 × 10.2mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-S3FN8** (mcu): Xtensa LX7 dual-core at 240MHz with 512KB SRAM, 8MB SiP flash, WiFi 802.11 b/g/n, BLE 5.0, 45 GPIOs, hardware AES/SHA/RSA crypto, and AI vector instructions. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=wifi-lora-32-v3&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver supporting 433/470/868/915MHz bands with +22dBm TX power and -134dBm RX sensitivity at SF12 BW=125kHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=wifi-lora-32-v3&source=md-export)
- **SSD1306** (display-driver): Solomon Systech SSD1306 driving the onboard 0.96-inch monochrome OLED display at 128×64 resolution via I2C (GPIO17/18). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=wifi-lora-32-v3&source=md-export)
- **CP2102** (usb-serial): Silicon Labs CP2102 USB-to-UART bridge enabling serial programming and debug output over USB-C without requiring a separate programmer. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=wifi-lora-32-v3&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO8 | LoRa NSS (SPI CS) | — | digital-output |
| GPIO9 | LoRa SCK | — | digital-output |
| GPIO10 | LoRa MOSI | — | digital-output, adc |
| GPIO11 | LoRa MISO | — | digital-input |
| GPIO12 | LoRa RESET | — | digital-output |
| GPIO13 | LoRa BUSY | — | digital-input |
| GPIO14 | LoRa DIO1 | — | digital-input |
| GPIO17 | OLED SDA | — | digital-output |
| GPIO18 | OLED SCL | — | digital-output |
| GPIO21 | OLED RST | — | digital-output |
| GPIO35 | LED (built-in) | — | digital-output, pwm |
| GPIO36 | Vext (external 3.3V power control) | — | digital-output |
| GPIO41 | I2C SDA (user) | — | digital-input, digital-output, pwm |
| GPIO42 | I2C SCL (user) | — | digital-input, digital-output, pwm |
| GPIO43 | UART TX | — | digital-output |
| GPIO44 | UART RX | — | digital-input |
| GPIO1 | ADC / User GPIO | — | digital-input, digital-output, adc, touch, pwm |
| GPIO2 | ADC / User GPIO | — | digital-input, digital-output, adc, touch, pwm |
| GPIO3 | ADC / User GPIO | — | digital-input, digital-output, adc, touch, pwm |
| GPIO4 | ADC / User GPIO | — | digital-input, digital-output, adc, touch, pwm |
| GPIO5 | ADC / User GPIO | — | digital-input, digital-output, adc, touch, pwm |
| GPIO6 | ADC / User GPIO | — | digital-input, digital-output, adc, touch, pwm |
| GPIO7 | ADC / User GPIO | — | digital-input, digital-output, adc, touch, pwm |
| GPIO33 | User GPIO | — | digital-input, digital-output, pwm |
| GPIO34 | User GPIO | — | digital-input, digital-output, pwm |
| GPIO45 | User GPIO (strapping) | — | digital-input, digital-output, pwm, strapping |
| GPIO46 | User GPIO (strapping) | — | digital-input, digital-output, pwm, strapping |
| GPIO47 | User GPIO | — | digital-input, digital-output, pwm |
| GPIO48 | User GPIO | — | digital-input, digital-output, pwm |

## Where to Buy

- [Heltec Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwifi-lora-32-v3%2F&ref=openhardware.directory&product=wifi-lora-32-v3&source=md-export) — 17.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwifi-lora-32-v3%2F&ref=openhardware.directory&product=wifi-lora-32-v3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltec_ESP32&ref=openhardware.directory&product=wifi-lora-32-v3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fesp32-series%2Flora-32%2Fwifi-lora-32-v3%2F&ref=openhardware.directory&product=wifi-lora-32-v3&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWiFi_LoRa_32_V3%2FHTIT-WB32LA_V3.2.pdf&ref=openhardware.directory&product=wifi-lora-32-v3&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWiFi_LoRa_32_V3%2FWiFi_LoRa_32_V3.2_Schematic_Diagram.pdf&ref=openhardware.directory&product=wifi-lora-32-v3&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/wifi-lora-32-v3)

---

# Circuit Playground Classic

> All-in-one ATmega32u4 learning board with 10 NeoPixels, LIS3DH accelerometer, microphone, speaker, light and temperature sensors, and 8 capacitive touch pads in a circular 2-inch form factor.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$19.95
- **CPU:** ATmega32u4 @ 8 MHz
- **RAM:** 2.5KB SRAM
- **Flash:** 32KB
- **Power:** 5V via Micro-USB / AAA battery pack / 3.7V LiPo
- **Dimensions:** 50.6mm diameter

## Compatible Firmware

- arduino

## Components

- **ATmega32u4** (mcu): 8-bit AVR microcontroller at 8MHz, 3.3V with native USB, 32KB flash, 2.5KB SRAM. — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.atmel.com%2FImages%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=circuit-playground-classic&source=md-export)
- **LIS3DH** (accelerometer): ST triple-axis MEMS accelerometer with tap detection and free-fall detection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flis3dh.pdf&ref=openhardware.directory&product=circuit-playground-classic&source=md-export)
- **SPW2430HR5H-B** (microphone): MEMS microphone for sound sensing and audio input. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fassets%2Fassets%2F000%2F040%2F891%2Foriginal%2FSPW2430HR5H-B.pdf&ref=openhardware.directory&product=circuit-playground-classic&source=md-export)
- **NCP15XH103F03RC** (thermistor): NTC thermistor for ambient temperature measurement. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fassets%2Fassets%2F000%2F040%2F892%2Foriginal%2FNCP15XH103F03RC.pdf&ref=openhardware.directory&product=circuit-playground-classic&source=md-export)

## Protocols

- **I2C**: SDA=D2, SCL=D3
- **UART**: TX=D1, RX=D0
- **SPI**: MOSI=D16, MISO=D14, SCK=D15
- **USB HID**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX — UART Receive / Capacitive Touch | — | digital-input, digital-output |
| D1 | TX — UART Transmit / Capacitive Touch | — | digital-input, digital-output |
| D2 | SDA — I2C Data | — | digital-input, digital-output |
| D3 | SCL — I2C Clock | — | digital-input, digital-output |
| D16 | SPI MOSI | — | digital-input, digital-output |
| D14 | SPI MISO | — | digital-input, digital-output |
| D15 | SPI SCK | — | digital-input, digital-output |
| D15 | A0 — Analog In / DAC / Capacitive Touch / PWM | — | analog-input, analog-output, digital-input, digital-output, pwm |
| D4 | A1 — Analog In / Capacitive Touch / PWM | — | analog-input, digital-input, digital-output, pwm |
| D5 | A2 — Analog In / Capacitive Touch / PWM | — | analog-input, digital-input, digital-output, pwm |
| D12 | A3 — Analog In / Capacitive Touch / PWM | — | analog-input, digital-input, digital-output, pwm |
| D24 | A4/SDA — Analog In / I2C SDA / Capacitive Touch | — | analog-input, digital-input, digital-output |
| D25 | A5/SCL — Analog In / I2C SCL / Capacitive Touch | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3000&ref=openhardware.directory&product=circuit-playground-classic&source=md-export) — 19.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3000&ref=openhardware.directory&product=circuit-playground-classic&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Circuit-Playground-PCB&ref=openhardware.directory&product=circuit-playground-classic&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fintroducing-circuit-playground%2Foverview&ref=openhardware.directory&product=circuit-playground-classic&source=md-export)
- [datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.atmel.com%2FImages%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=circuit-playground-classic&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fassets%2Fassets%2F000%2F031%2F914%2Fmedium800%2Fcircuit_playground_schem.png&ref=openhardware.directory&product=circuit-playground-classic&source=md-export)

## Tags

`circuit-playground`, `atmega32u4`, `neopixel`, `educational`, `capacitive-touch`, `accelerometer`, `wearable`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/circuit-playground-classic)

---

# Circuit Playground Express

> All-in-one ATSAMD21 learning board with 10 NeoPixels, LIS3DH accelerometer, MEMS microphone, speaker with class D amp, IR transmit/receive, 7 capacitive touch pads, and 2MB SPI flash for CircuitPython code storage.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$24.95
- **CPU:** ATSAMD21G18 ARM Cortex-M0+ @ 48 MHz
- **RAM:** 32KB SRAM
- **Flash:** 256KB + 2MB SPI Flash
- **Power:** 5V via Micro-USB / AAA battery pack / 3.7V LiPo
- **Dimensions:** 50.6mm diameter

## Compatible Firmware

- arduino
- circuitpython

## Components

- **ATSAMD21G18** (mcu): ARM Cortex-M0+ at 48MHz, 256KB flash, 32KB SRAM, native USB supporting serial, HID, MIDI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fimages%2Fproduct-files%2F2772%2Fatmel-42181-sam-d21_datasheet.pdf&ref=openhardware.directory&product=circuit-playground-express&source=md-export)
- **LIS3DH** (accelerometer): ST triple-axis MEMS accelerometer with tap detection and free-fall detection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flis3dh.pdf&ref=openhardware.directory&product=circuit-playground-express&source=md-export)
- **SPW2430HR5H-B** (microphone): MEMS microphone for audio input and sound sensing. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fassets%2Fassets%2F000%2F040%2F891%2Foriginal%2FSPW2430HR5H-B.pdf&ref=openhardware.directory&product=circuit-playground-express&source=md-export)

## Protocols

- **I2C**: SDA=PA22, SCL=PA23
- **UART**: TX=PA10, RX=PA11
- **SPI**: MOSI=PA16, MISO=PA19, SCK=PA17
- **USB HID**
- **USB MIDI**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA11 | A7/RX — Analog In / UART Receive / Capacitive Touch | — | analog-input, digital-input, digital-output |
| PA10 | A6/TX — Analog In / UART Transmit / Capacitive Touch | — | analog-input, digital-input, digital-output |
| PA22 | SDA/A5 — I2C Data | — | digital-input, digital-output |
| PA23 | SCL/A4 — I2C Clock | — | digital-input, digital-output |
| PA16 | SPI MOSI | — | digital-input, digital-output |
| PA19 | SPI MISO | — | digital-input, digital-output |
| PA17 | SPI SCK | — | digital-input, digital-output |
| PA02 | A0 — Analog In / DAC / Capacitive Touch / PWM | — | analog-input, analog-output, digital-input, digital-output, pwm |
| PB08 | A1 — Analog In / Capacitive Touch / PWM | — | analog-input, digital-input, digital-output, pwm |
| PB09 | A2 — Analog In / Capacitive Touch / PWM | — | analog-input, digital-input, digital-output, pwm |
| PA04 | A3 — Analog In / Capacitive Touch / PWM | — | analog-input, digital-input, digital-output, pwm |
| PA05 | A4/SCL — Analog In / Capacitive Touch | — | analog-input, digital-input, digital-output |
| PB02 | A5/SDA — Analog In / Capacitive Touch | — | analog-input, digital-input, digital-output |
| PA20 | A6/TX — Analog In / UART TX / Capacitive Touch | — | analog-input, digital-input, digital-output |
| PA07 | A7/RX — Analog In / UART RX / Capacitive Touch | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3333&ref=openhardware.directory&product=circuit-playground-express&source=md-export) — 24.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3333&ref=openhardware.directory&product=circuit-playground-express&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Circuit-Playground-Express-PCB&ref=openhardware.directory&product=circuit-playground-express&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-circuit-playground-express%2Foverview&ref=openhardware.directory&product=circuit-playground-express&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fimages%2Fproduct-files%2F2772%2Fatmel-42181-sam-d21_datasheet.pdf&ref=openhardware.directory&product=circuit-playground-express&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fassets%2Fassets%2F000%2F049%2F671%2Fmedium800%2Fmakecode_schem.png&ref=openhardware.directory&product=circuit-playground-express&source=md-export)

## Tags

`circuit-playground`, `atsamd21`, `neopixel`, `educational`, `circuitpython`, `makecode`, `capacitive-touch`, `ir`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/circuit-playground-express)

---

# Heltec Wireless Tracker V2

> ESP32-S3 development board with SX1262 LoRa (28dBm), UC6580 dual-frequency GNSS, 0.96" TFT display, solar charging, and Meshtastic/MeshCore support for GPS tracking and mesh networking.

## Quick Facts

- **Brand:** Heltec Automation
- **Price:** ~$26.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 8MB (Quad SPI)
- **USB:** USB-C 2.0
- **Power:** 5V via USB-C,3.7V LiPo,Solar panel
- **Dimensions:** 52.00 × 25.40 × 10.26mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-S3FN8** (mcu): Xtensa LX7 dual-core processor @ 240MHz with 8MB flash, 512KB SRAM, WiFi 802.11 b/g/n, BLE 5.0, and hardware cryptographic acceleration. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- **SX1262** (radio): Semtech SX1262 long-range LoRa transceiver supporting 863-928MHz bands with -134dBm RX sensitivity, paired with KCT8103L PA for 28dBm TX power. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- **UC6580** (gps): Unicore UC6580 GNSS chip with L1+L5 dual-frequency reception, supporting GPS, GLONASS, BDS, Galileo, NAVIC, and QZSS with 96 tracking channels and sub-1.5m accuracy. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fen.unicore.com%2Fuploads%2Ffile%2FUC6580x-00_Datasheet_EN_R1.5.pdf&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- **ST7735S** (display-driver): Sitronix ST7735S TFT-LCD controller driving a 160x80 pixel color display via SPI interface at up to 40MHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.crystalfontz.com%2Fcontrollers%2FSitronix%2FST7735S%2F320%2F&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- **CN3165** (battery-charger): Shanghai Consonance CN3165 linear battery charger IC with up to 1A charge current, solar panel input support, CC/CV/CT charging modes, and thermal regulation up to 130°C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2005251035_ShangHai-Consonance-Elec-CN3165_C559035.pdf&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- **KCT8103L** (rf-front-end): KCT8103L RF front-end module with integrated power amplifier (PA) and low noise amplifier (LNA), boosting LoRa TX power to 28dBm with 21dB LNA gain and 1.9dB noise figure. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ftelectronic.com%2FPublic%2FUpload%2Fnews%2F20250430%2F68121966da4e7.pdf&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)

## Protocols

- **SPI (Display)** (SPI3): CS=GPIO38, SCK=GPIO41, MOSI=GPIO42, DC=GPIO40, RESET=GPIO39
- **SPI (LoRa)**: CS=GPIO8, SCK=GPIO9, MOSI=GPIO10, MISO=GPIO11
- **UART (GPS)** (UART1): TX=GPIO34, RX=GPIO33
- **UART (USB Serial)** (UART0): TX=GPIO43, RX=GPIO44
- **I2C**: SDA=SDA, SCL=SCL
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | USER / PRG Button | — | digital-input, digital-output, pwm, strapping |
| GPIO1 | Battery Voltage ADC | — | adc, digital-input, digital-output, rtc |
| GPIO2 | ADC Power Control | — | digital-input, digital-output, adc, touch, rtc |
| GPIO3 | Vext Enable (GPS/Display Power) | — | digital-input, digital-output, adc, touch, rtc |
| GPIO4 | KCT8103L PA CSD (Chip Enable) | — | digital-input, digital-output, adc, touch, rtc |
| GPIO5 | KCT8103L PA CTX (RX Mode Select) | — | digital-input, digital-output, adc, touch, rtc |
| GPIO6 | User GPIO / Header Pin | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO7 | VFEM Power Control (PA LDO) | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO8 | LoRa SX1262 CS | — | digital-input, digital-output, touch, pwm |
| GPIO9 | LoRa SPI SCK | — | digital-input, digital-output, touch, pwm |
| GPIO10 | LoRa SPI MOSI | — | digital-input, digital-output, touch, pwm |
| GPIO11 | LoRa SPI MISO | — | digital-input, digital-output, touch, pwm |
| GPIO12 | LoRa SX1262 RESET | — | digital-input, digital-output, touch, pwm |
| GPIO13 | LoRa SX1262 BUSY | — | digital-input, digital-output, touch, pwm |
| GPIO14 | LoRa SX1262 DIO1 (IRQ) | — | digital-input, digital-output, touch, pwm |
| GPIO18 | LED Power | — | digital-input, digital-output, pwm |
| GPIO21 | TFT Backlight Control | — | digital-input, digital-output, pwm |
| GPIO33 | GPS UART RX | — | digital-input, digital-output, pwm |
| GPIO34 | GPS UART TX | — | digital-input, digital-output, pwm |
| GPIO35 | GPS Reset | — | digital-input, digital-output, pwm |
| GPIO36 | GPS PPS (Pulse Per Second) | — | digital-input, digital-output, pwm |
| GPIO38 | TFT Display CS | — | digital-input, digital-output, pwm |
| GPIO39 | TFT Display RESET | — | digital-input, digital-output, pwm |
| GPIO40 | TFT Display DC | — | digital-input, digital-output, pwm |
| GPIO41 | TFT Display SCK | — | digital-input, digital-output, pwm |
| GPIO42 | TFT Display MOSI | — | digital-input, digital-output, pwm |
| GPIO43 | USB Serial TX (CP2102) | — | digital-input, digital-output, pwm |
| GPIO44 | USB Serial RX (CP2102) | — | digital-input, digital-output, pwm |
| GPIO45 | User GPIO / Header Pin | — | digital-input, digital-output, pwm, strapping |
| GPIO46 | User GPIO / Header Pin | — | digital-input, digital-output, pwm, strapping |

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwireless-tracker-v2%2F&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export) — 26.90
- [Amazon UK](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.co.uk%2FHeltec-Wireless-V2-Compatible-Positioning%2Fdp%2FB0GSZN129X&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export) — 36.23

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwireless-tracker-v2%2F&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltec_ESP32&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fesp32-series%2Flora-32%2Fwireless-tracker-v2%2F&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Tracker_V2%2FWireless_Tracker_v2_Datasheet%2FWireless%2520Tracker%2520v2.pdf&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Tracker_V2%2FSchematic%2FHTIT-Tracker_V2.3.pdf&ref=openhardware.directory&product=heltec-wireless-tracker-v2&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/heltec-wireless-tracker-v2)

---

# Heltec Wireless Tracker

> ESP32-S3 development board with integrated SX1262 LoRa transceiver, UC6580 dual-frequency GNSS receiver, and 0.96-inch TFT display for IoT asset tracking, Meshtastic mesh networking, and LoRaWAN applications.

## Quick Facts

- **Brand:** Heltec Automation
- **Price:** ~$22.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, hardware crypto (AES/SHA)
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **USB:** USB-C 2.0
- **Power:** 5V via USB-C,3.7V LiPo
- **Dimensions:** 65.48 × 28.06 × 13.52mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-S3FN8** (mcu): Xtensa LX7 dual-core processor at 240MHz with 8MB flash, 512KB SRAM, WiFi 802.11 b/g/n and Bluetooth LE 5.0. Features hardware crypto acceleration (AES/SHA), 12-bit SAR ADC, touch sensing, and ULP co-processor for deep sleep operation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-wireless-tracker&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver supporting 150-960MHz ISM bands with +22dBm transmit power and -134dBm receive sensitivity. Supports both LoRa modulation for LPWAN and (G)FSK for legacy protocols. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F6%2Fb%2F5%2F1%2F4%2FSX1262_datasheet.pdf&ref=openhardware.directory&product=heltec-wireless-tracker&source=md-export)
- **UC6580** (gps): Unicore UC6580 GNSS receiver with 96 tracking channels supporting GPS, GLONASS, BDS, Galileo, NAVIC, and QZSS. L1+L5 dual-frequency capability delivers sub-1.5m positioning accuracy with advanced multi-path mitigation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fen.unicore.com%2Fuploads%2Ffile%2FUC6580x-00_Datasheet_EN_R1.5.pdf&ref=openhardware.directory&product=heltec-wireless-tracker&source=md-export)
- **ST7735** (display-driver): Sitronix ST7735 TFT controller driving the onboard 0.96-inch 160x80 pixel color LCD display via SPI interface. Supports 262K colors with built-in display RAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7735.pdf&ref=openhardware.directory&product=heltec-wireless-tracker&source=md-export)

## Protocols

- **SPI (LoRa)** (SPI0): SCK=GPIO9, MOSI=GPIO10, MISO=GPIO11, CS=GPIO8
- **SPI (Display)** (SPI1): SCLK=GPIO41, MOSI=GPIO42, CS=GPIO38, DC=GPIO40, RST=GPIO39
- **UART (Console)** (UART0): TX=GPIO43, RX=GPIO44
- **UART (GNSS)** (UART2): TX=GPIO34, RX=GPIO33
- **UART (General)** (UART1): TX=GPIO17, RX=GPIO18
- **I2C**: SDA=GPIO41, SCL=GPIO42
- **PWM**
- **ADC**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | User Button (BOOT) | — | digital-input, digital-output, pwm, touch, rtc, strapping |
| GPIO1 | ADC1_CH0 | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO2 | ADC1_CH1 | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO3 | Vext Control (GNSS + Display Power) | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO4 | ADC1_CH3 | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO5 | ADC1_CH4 | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO6 | ADC1_CH5 | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO7 | ADC1_CH6 | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO8 | LoRa NSS (SPI CS) | — | digital-input, digital-output, adc, touch, pwm |
| GPIO9 | LoRa SCK | — | digital-input, digital-output, adc, touch, pwm |
| GPIO10 | LoRa MOSI | — | digital-input, digital-output, adc, touch, pwm |
| GPIO11 | LoRa MISO | — | digital-input, digital-output, adc, touch, pwm |
| GPIO12 | LoRa RST | — | digital-input, digital-output, adc, touch, pwm |
| GPIO13 | LoRa Busy | — | digital-input, digital-output, adc, touch, pwm |
| GPIO14 | LoRa DIO1 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO17 | UART1 TX | — | digital-input, digital-output, pwm |
| GPIO18 | UART1 RX / LED | — | digital-input, digital-output, adc, pwm |
| GPIO21 | Display Backlight | — | digital-input, digital-output, pwm |
| GPIO33 | GNSS UART2 RX | — | digital-input, digital-output, pwm |
| GPIO34 | GNSS UART2 TX | — | digital-input, digital-output, pwm |
| GPIO37 | ADC Control | — | digital-input, digital-output, pwm |
| GPIO38 | Display CS | — | digital-input, digital-output, pwm |
| GPIO39 | Display RST | — | digital-input, digital-output, pwm |
| GPIO40 | Display DC | — | digital-input, digital-output, pwm |
| GPIO41 | Display SCLK / I2C SDA | — | digital-input, digital-output, pwm |
| GPIO42 | Display MOSI / I2C SCL | — | digital-input, digital-output, pwm |
| GPIO43 | UART0 TX (Console) | — | digital-input, digital-output, pwm |
| GPIO44 | UART0 RX (Console) | — | digital-input, digital-output, pwm |

## Where to Buy

- [Heltec Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwireless-tracker%2F&ref=openhardware.directory&product=heltec-wireless-tracker&source=md-export) — 22.90
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-Meshtastic-Wireless-Development-902-928MHz%2Fdp%2FB0D1QBSLKS&ref=openhardware.directory&product=heltec-wireless-tracker&source=md-export) — 22.90
- [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.us%2Fitem%2F3256806779722665.html&ref=openhardware.directory&product=heltec-wireless-tracker&source=md-export) — 18.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwireless-tracker%2F&ref=openhardware.directory&product=heltec-wireless-tracker&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHeltec-Aaron-Lee%2FWiFi_Kit_series&ref=openhardware.directory&product=heltec-wireless-tracker&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fesp32-series%2Flora-32%2Fwireless-tracker%2F&ref=openhardware.directory&product=heltec-wireless-tracker&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Tracker%2FWireless%2520Tracker1.1.pdf&ref=openhardware.directory&product=heltec-wireless-tracker&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Tracker%2FWireless_Tacker1.1%2FHTIT-Tracker_V0.5.pdf&ref=openhardware.directory&product=heltec-wireless-tracker&source=md-export)

## Tags

`esp32-s3`, `lora`, `gps`, `gnss`, `meshtastic`, `lorawan`, `tracker`, `iot`, `sx1262`, `uc6580`

---
[View full device page](https://openhardware.directory/s/1370/heltec-wireless-tracker)

---

# Heltec Wireless Stick V3

> Compact ESP32-S3 development board with integrated SX1262 LoRa transceiver and 0.49-inch OLED display. Supports Meshtastic, LoRaWAN, WiFi, and BLE 5.0 in a breadboard-friendly form factor with battery management.

## Quick Facts

- **Brand:** Heltec Automation
- **Price:** ~$17.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **USB:** USB-C 2.0 (via CP2102)
- **Power:** 5V via USB-C,3.7V LiPo
- **Dimensions:** 58.08 × 22.6 × 8.2mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-S3FN8** (mcu): Xtensa LX7 dual-core processor @ 240MHz with 512KB SRAM, 8MB in-package flash, WiFi 802.11 b/g/n, BLE 5.0, hardware crypto acceleration, and ULP co-processor for deep sleep operation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-wireless-stick-v3&source=md-export)
- **SX1262** (radio): Semtech SX1262 long-range LoRa radio supporting 150-960MHz ISM bands with +22dBm TX power, -134dBm RX sensitivity, LoRa and FSK modulation, and ultra-low power consumption. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F6%2Fb%2F5%2F1%2F4%2FSX1262_datasheet.pdf&ref=openhardware.directory&product=heltec-wireless-stick-v3&source=md-export)
- **SSD1306** (display-driver): Solomon Systech SSD1306 OLED display controller driving a 64x32 pixel monochrome display via I2C interface at address 0x3C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=heltec-wireless-stick-v3&source=md-export)
- **CP2102** (usb-serial): Silicon Labs CP2102 single-chip USB 2.0 full-speed to UART bridge for programming and serial debugging. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=heltec-wireless-stick-v3&source=md-export)

## Protocols

- **SPI** (SPI0 (LoRa)): SCK=GPIO9, MOSI=GPIO10, MISO=GPIO11, NSS=GPIO8
- **I2C** (I2C0 (OLED)): SDA=GPIO17, SCL=GPIO18
- **I2C** (I2C1 (User)): SDA=GPIO41, SCL=GPIO42
- **UART** (UART0 (USB)): TX=GPIO43, RX=GPIO44
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | A0 — ADC1 CH0 | — | adc, touch, digital-input, digital-output, pwm, rtc |
| GPIO2 | A1 — ADC1 CH1 | — | adc, touch, digital-input, digital-output, pwm, rtc |
| GPIO3 | A2 — ADC1 CH2 | — | adc, touch, digital-input, digital-output, pwm, rtc |
| GPIO4 | A3 — ADC1 CH3 | — | adc, touch, digital-input, digital-output, pwm, rtc |
| GPIO5 | A4 — ADC1 CH4 | — | adc, touch, digital-input, digital-output, pwm, rtc |
| GPIO6 | A5 — ADC1 CH5 | — | adc, touch, digital-input, digital-output, pwm, rtc |
| GPIO7 | A6 — ADC1 CH6 | — | adc, touch, digital-input, digital-output, pwm, rtc |
| GPIO8 | SPI NSS (LoRa) | — | digital-input, digital-output, pwm, adc |
| GPIO9 | SPI SCK (LoRa) | — | digital-input, digital-output, pwm, adc |
| GPIO10 | SPI MOSI (LoRa) | — | digital-input, digital-output, pwm, adc |
| GPIO11 | SPI MISO (LoRa) | — | digital-input, digital-output, pwm, adc |
| GPIO12 | LoRa RST | — | digital-input, digital-output, pwm, adc |
| GPIO13 | LoRa BUSY | — | digital-input, digital-output, pwm, adc |
| GPIO14 | LoRa DIO1 | — | digital-input, digital-output, pwm, adc |
| GPIO17 | OLED SDA | — | digital-input, digital-output, pwm, adc |
| GPIO18 | OLED SCL | — | digital-input, digital-output, pwm, adc |
| GPIO19 | General Purpose | — | digital-input, digital-output, pwm, adc |
| GPIO20 | General Purpose | — | digital-input, digital-output, pwm, adc |
| GPIO21 | OLED RST | — | digital-input, digital-output, pwm |
| GPIO35 | LED | — | digital-input, digital-output, pwm |
| GPIO36 | Vext Control | — | digital-input, digital-output |
| GPIO41 | User I2C SDA | — | digital-input, digital-output, pwm |
| GPIO42 | User I2C SCL | — | digital-input, digital-output, pwm |
| GPIO43 | UART TX | — | digital-input, digital-output, pwm |
| GPIO44 | UART RX | — | digital-input, digital-output, pwm |
| GPIO47 | General Purpose | — | digital-input, digital-output, pwm |
| GPIO48 | RGB LED (Neopixel) | — | digital-input, digital-output, pwm |

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwireless-stick-v3%2F&ref=openhardware.directory&product=heltec-wireless-stick-v3&source=md-export) — 17.90
- [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fi%2F1005005443586616.html&ref=openhardware.directory&product=heltec-wireless-stick-v3&source=md-export) — 17.90
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-Meshtastic-Development-863-870MHz-902-928MHz%2Fdp%2FB0D1YD5Y26&ref=openhardware.directory&product=heltec-wireless-stick-v3&source=md-export) — 22.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwireless-stick-v3%2F&ref=openhardware.directory&product=heltec-wireless-stick-v3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHeltec-Aaron-Lee%2FWiFi_Kit_series&ref=openhardware.directory&product=heltec-wireless-stick-v3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fesp32-series%2Flora-32%2Fwireless-stick%2F&ref=openhardware.directory&product=heltec-wireless-stick-v3&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Stick_V3%2FHTIT-WS_V3%28Rev1.0%29.pdf&ref=openhardware.directory&product=heltec-wireless-stick-v3&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Stick_V3%2FHTIT-WS_V3_Schematic_Diagram.pdf&ref=openhardware.directory&product=heltec-wireless-stick-v3&source=md-export)

## Tags

`esp32-s3`, `lora`, `meshtastic`, `lorawan`, `oled`, `iot`, `heltec`

---
[View full device page](https://openhardware.directory/s/1370/heltec-wireless-stick-v3)

---

# LILYGO T-SimCam

> ESP32-S3 camera development board with mPCIe slot for LILYGO T-PCIE SIM cellular modules, supporting OV2640 or OV5640 cameras, 16MB flash, 8MB PSRAM, TF card, and I2S microphone for connected vision applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$13.86
- **CPU:** ESP32-S3R8
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3R8** (mcu): Dual-core 240MHz Xtensa LX7 with 8MB embedded PSRAM, WiFi 802.11, and BLE 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-simcam&source=md-export)
- **OV2640** (camera): 2-megapixel (1622×1200 UXGA) image sensor at 3.3V, with IR-CUT variant available — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2Fcam_module%2FOV2640DS.pdf&ref=openhardware.directory&product=lilygo-t-simcam&source=md-export)
- **OV5640** (camera): 5-megapixel image sensor with optional autofocus and IR-CUT variants available as upgrade option — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2Fcam_module%2FOV2640DS.pdf&ref=openhardware.directory&product=lilygo-t-simcam&source=md-export)
- **mPCIe Slot** (expansion): Mini PCI Express slot for LILYGO T-PCIE SIM cellular modules (sold separately) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-simcam&source=md-export)
- **I2S Microphone** (audio): I2S digital microphone for audio capture alongside camera video — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-simcam&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **I2S**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-simcam&ref=openhardware.directory&product=lilygo-t-simcam&source=md-export) — $13.86

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-simcam&ref=openhardware.directory&product=lilygo-t-simcam&source=md-export)

## Tags

`esp32-s3`, `camera`, `cellular`, `ov2640`, `ov5640`, `mpcie`, `vision`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-simcam)

---

# LILYGO T-Vending

> ESP32-S3-WROOM-1 development board with MAX13487E RS-485 transceiver, T-PCIE SIM expansion slot, Grove connector, WiFi, and BLE — designed for vending machine control and industrial RS-485 communication applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$18.96
- **CPU:** ESP32-S3-WROOM-1
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3-WROOM-1** (mcu): Dual-core 240MHz Xtensa LX7 module with WiFi 802.11 b/g/n and BLE 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-vending&source=md-export)
- **MAX13487E** (transceiver): Half-duplex RS-485 transceiver at up to 500 kbps with ±15kV ESD protection for industrial environments — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fen%2Fproducts%2Fmax13487e.html&ref=openhardware.directory&product=lilygo-t-vending&source=md-export)
- **Grove Connector** (expansion): Standard Grove 4-pin connector for easy sensor and module integration — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-vending&source=md-export)
- **T-PCIE Slot** (expansion): Mini PCI Express slot for LILYGO T-PCIE SIM cellular modules (sold separately) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-vending&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **RS-485**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-vending&ref=openhardware.directory&product=lilygo-t-vending&source=md-export) — $18.96

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-vending&ref=openhardware.directory&product=lilygo-t-vending&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Vending&ref=openhardware.directory&product=lilygo-t-vending&source=md-export)

## Tags

`esp32-s3`, `rs485`, `vending-machine`, `industrial-iot`, `modbus`, `grove`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-vending)

---

# LILYGO T3 STM32

> STM32WL55CCU6 LoRa development board with dual Cortex-M4 + M0+ cores, built-in LoRa/FSK/MSK radio at 433/868/915MHz, 0.96-inch SSD1315 OLED, 256KB Flash, 64KB RAM, and open-source Arduino/STM32CubeIDE firmware support.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** STM32
- **Price:** ~$15.03
- **CPU:** STM32WL55CCU6
- **RAM:** 64KB
- **Flash:** 256KB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Compatible Firmware

- arduino
- platformio

## Components

- **STM32WL55CCU6** (mcu): Dual-core STM32WL with Cortex-M4 and Cortex-M0+ CPUs plus integrated sub-GHz LoRa/FSK/MSK/BPSK radio at 433/868/915MHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32wl55cc.pdf&ref=openhardware.directory&product=lilygo-t3-stm32&source=md-export)
- **SSD1315** (display): 0.96-inch monochrome OLED at 128×64 resolution via SPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t3-stm32&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft3-stm32&ref=openhardware.directory&product=lilygo-t3-stm32&source=md-export) — $15.03
- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Flilygo-t3-stm32-st-state&ref=openhardware.directory&product=lilygo-t3-stm32&source=md-export) — €22.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft3-stm32&ref=openhardware.directory&product=lilygo-t3-stm32&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT3-STM32&ref=openhardware.directory&product=lilygo-t3-stm32&source=md-export)

## Tags

`stm32`, `stm32wl`, `lora`, `lorawan`, `oled`, `cortex-m4`, `development-board`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t3-stm32)

---

# Makerfabs ESP32 UWB DW3000

> ESP32 + DW3000 UWB development board for centimeter-accurate indoor positioning and ranging. Supports UWB channels 5 and 9, FiRa compatible, Apple U1 interoperable. WiFi and Bluetooth for data relay.

## Quick Facts

- **Brand:** Makerfabs
- **Board Type:** dev-board
- **Price:** ~$43.8
- **CPU:** ESP32 (Xtensa LX6 dual-core @ 240MHz)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **GPIO:** 7 pins
- **USB:** Micro-USB
- **Power:** 5V via Micro-USB (4.8-5.5V)

## Connectivity

WiFi 802.11 b/g/n | Bluetooth 4.2 + BLE

## Compatible Firmware

- arduino
- platformio
- esphome
- esp-idf

## Components

- **ESP32-WROOM-32** (mcu): Espressif ESP32 dual-core Xtensa LX6 MCU with WiFi and Bluetooth 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=makerfabs-esp32-uwb-dw3000&source=md-export)
- **DW3000** (uwb-transceiver): Qorvo/Decawave DW3000 UWB transceiver, IEEE 802.15.4z, FiRa compatible, Apple U1 interoperable, channels 5 (6.5GHz) and 9 (8GHz) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.qorvo.com%2Fproducts%2Fd%2Fda008142&ref=openhardware.directory&product=makerfabs-esp32-uwb-dw3000&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UWB**
- **UART**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO18 | SPI SCK (to DW3000) | — | digital-output |
| GPIO19 | SPI MISO (from DW3000) | — | digital-input |
| GPIO23 | SPI MOSI (to DW3000) | — | digital-output |
| GPIO4 | SPI SS / I2C SDA | — | digital-output, digital-input |
| GPIO5 | I2C SCL | — | digital-output, digital-input |
| GPIO27 | DW3000 Reset | — | digital-output |
| GPIO34 | DW3000 IRQ | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Makerfabs](https://openhardware.directory/r?to=https%3A%2F%2Fwww.makerfabs.com%2Fesp32-uwb-dw3000.html&ref=openhardware.directory&product=makerfabs-esp32-uwb-dw3000&source=md-export) — $43.80
- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fmakerfabs%2Fesp32-uwb-dw3000ultra-wideband%2F&ref=openhardware.directory&product=makerfabs-esp32-uwb-dw3000&source=md-export) — $43.80

## Available Software

- [Makerfabs DW3000 Arduino Library](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FMakerfabs%2FMakerfabs-ESP32-UWB-DW3000&ref=openhardware.directory&product=makerfabs-esp32-uwb-dw3000&source=md-export)
- [ESPHome UWB DW3000 Component](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Frealzoulou%2Fesphome-uwb-dw3000&ref=openhardware.directory&product=makerfabs-esp32-uwb-dw3000&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.makerfabs.com%2Fesp32-uwb-dw3000.html&ref=openhardware.directory&product=makerfabs-esp32-uwb-dw3000&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FMakerfabs%2FMakerfabs-ESP32-UWB-DW3000&ref=openhardware.directory&product=makerfabs-esp32-uwb-dw3000&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.makerfabs.com%2FESP32_DW3000_UWB.html&ref=openhardware.directory&product=makerfabs-esp32-uwb-dw3000&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.qorvo.com%2Fproducts%2Fd%2Fda008142&ref=openhardware.directory&product=makerfabs-esp32-uwb-dw3000&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FMakerfabs%2FMakerfabs-ESP32-UWB-DW3000%2Ftree%2Fmain%2Fhardware&ref=openhardware.directory&product=makerfabs-esp32-uwb-dw3000&source=md-export)

## Tags

`esp32`, `uwb`, `dw3000`, `indoor-positioning`, `ranging`, `rtls`, `fira`, `apple-u1`, `ultra-wideband`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/makerfabs-esp32-uwb-dw3000)

---

# Elecrow ThinkNode M1

> Compact Meshtastic LoRa transceiver with nRF52840, SX1262, 1.54\" e-paper display, GPS, and 1200mAh battery for off-grid mesh communication.

## Quick Facts

- **Brand:** Elecrow
- **Board Type:** meshtastic-transceiver
- **Price:** ~$53.9
- **CPU:** ARM Cortex-M4F @ 64MHz, FPU, DSP, HW crypto (CryptoCell-310)
- **RAM:** 256KB SRAM
- **Flash:** 1MB internal + 2MB external QSPI
- **USB:** USB-C 2.0
- **Power:** 5V + LiPo
- **Dimensions:** 82 × 51.6 × 26.3mm (with case: 118.5 × 52.1 × 25mm)

## Connectivity

Bluetooth BLE 5.0

## Compatible Firmware

- meshtastic
- meshcore
- arduino

## Components

- **nRF52840** (mcu): Nordic Semiconductor nRF52840 SoC with ARM Cortex-M4F at 64MHz, 256KB RAM, 1MB flash, BLE 5.0, and hardware crypto (CryptoCell-310). Ultra-low power with 5.6uA standby current. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.nordicsemi.com%2Fbundle%2FnRF52840_PS_v1.9%2Fresource%2FnRF52840_PS_v1.9.pdf&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver supporting 868MHz and 915MHz bands with up to +22dBm transmit power. Enables long-range mesh communication via the Meshtastic protocol. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F6%2Fb%2F5%2F1%2F4%2FSX1262_datasheet.pdf&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export)
- **SSD1681** (display-driver): Solomon Systech SSD1681 e-paper controller driving a 1.54-inch 200x200 monochrome EPD panel via SPI. Provides ultra-low power display with image retention without power, ideal for battery-operated devices. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.buydisplay.com%2Fdownload%2Fic%2FSSD1681.pdf&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export)
- **L76K** (gps): Quectel L76K compact GNSS module with 32 tracking channels supporting GPS, GLONASS, BeiDou, and QZSS constellations. 29mA tracking current, -162dBm sensitivity, connected via UART. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fupload%2Fd%2Fdb%2FQuectel_L76K_Hardware_Design_V1.0.pdf&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export)

## Protocols

- **SPI** (SPI0): MISO=GPIO23, MOSI=GPIO22, SCK=GPIO19, CS=GPIO24 (LoRa)
- **SPI** (SPI1): MOSI=GPIO29, SCK=GPIO31, CS=GPIO30 (E-Paper), DC=GPIO28
- **I2C** (Wire): SDA=GPIO26, SCL=GPIO27
- **UART** (GPS): TX=GPIO40, RX=GPIO41

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO19 | SPI0 SCK (LoRa) | — | digital-output |
| GPIO22 | SPI0 MOSI (LoRa) | — | digital-output |
| GPIO23 | SPI0 MISO (LoRa) | — | digital-input |
| GPIO24 | SX1262 CS | — | digital-output |
| GPIO20 | SX1262 DIO1 | — | digital-input |
| GPIO17 | SX1262 BUSY | — | digital-input |
| GPIO25 | SX1262 RESET | — | digital-output |
| GPIO21 | SX1262 Power Enable | — | digital-output |
| GPIO29 | SPI1 MOSI (E-Paper) | — | digital-output |
| GPIO31 | SPI1 SCK (E-Paper) | — | digital-output |
| GPIO30 | E-Paper CS | — | digital-output |
| GPIO28 | E-Paper DC | — | digital-output |
| GPIO2 | E-Paper RESET | — | digital-output |
| GPIO3 | E-Paper BUSY | — | digital-input |
| GPIO43 | E-Paper Power Enable | — | digital-output |
| GPIO26 | I2C SDA | — | digital-input, digital-output |
| GPIO27 | I2C SCL | — | digital-input, digital-output |
| GPIO40 | GPS UART TX | — | digital-output |
| GPIO41 | GPS UART RX | — | digital-input |
| GPIO37 | GPS REINIT | — | digital-output |
| GPIO34 | GPS Standby | — | digital-output |
| GPIO33 | GPS Switch | — | digital-output |
| GPIO4 | Battery ADC | — | adc |
| GPIO6 | Buzzer | — | digital-output, pwm |
| GPIO38 | LED Red | — | digital-output |
| GPIO36 | LED Power | — | digital-output |
| GPIO13 | LED Green (Notification) | — | digital-output |
| GPIO42 | Button 1 | — | digital-input |
| GPIO39 | Button 2 | — | digital-input |
| GPIO35 | External Power Detect | — | digital-input |
| GPIO12 | Power Enable | — | digital-output |
| GPIO11 | Touch Sensor | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Elecrow](https://openhardware.directory/r?to=https%3A%2F%2Fwww.elecrow.com%2Fthinknode-m1-meshtastic-lora-signal-transceiver-powered-by-nrf52840-with-154-screen-support-gps.html&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export) — $53.90
- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Felecrow%2Fthinknode-m1-lora-meshtastic-transceiver-154gps%2F&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export) — $53.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.elecrow.com%2Fthinknode-m1-meshtastic-lora-signal-transceiver-powered-by-nrf52840-with-154-screen-support-gps.html&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FElecrow-RD%2FThinkNode-M1-LoRa-Meshtastic-Transceiver-With-1.54-EPD-Screen-GPS-function-nRF52840&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.elecrow.com%2Fwiki%2FThinkNode-M1_Transceiver_Device%28Meshtastic%29_Power_By_nRF52840.html&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.elecrow.com%2Fdownload%2Fproduct%2FCIL12901M%2FThinkNode%2520M1_LoRa_Meshtastic_Transceiver_DataSheet.pdf&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export)

## Tags

`meshtastic`, `lora`, `nrf52840`, `gps`, `e-paper`, `off-grid`, `mesh-networking`, `ble`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/elecrow-thinknode-m1)

---

# DFRobot Romeo ESP32-S3

> All-in-one robotics development board with ESP32-S3 (16MB flash, 8MB PSRAM), four-channel 2.5A motor driver, OV2640 camera, WiFi, Bluetooth 5, microSD, and GDI display connector for building smart robots.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** robotics-kit
- **Price:** ~$46.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C 2.0 (OTG)
- **Power:** 5V USB-C / 7-24V VIN / 5-24V VM (motor)
- **Dimensions:** 75 × 90mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 5 + BLE

## Components

- **ESP32-S3-WROOM-1U-N16R8** (mcu): ESP32-S3-WROOM-1U module with Xtensa LX7 dual-core @ 240MHz, 16MB flash, 8MB PSRAM, WiFi and Bluetooth 5. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-romeo-esp32-s3&source=md-export)
- **OV2640** (camera): OV2640 2-megapixel camera module (up to 1600x1200) with dedicated power circuit for FPV and computer vision. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2FOV2640_DS.pdf&ref=openhardware.directory&product=dfrobot-romeo-esp32-s3&source=md-export)
- **4CH-H-Bridge** (motor-driver): Integrated four-channel H-bridge motor driver with 2.5A per channel, supporting PH/EN and PWM control modes for DC motors. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2743.html&ref=openhardware.directory&product=dfrobot-romeo-esp32-s3&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | GPIO/ADC | — | digital-input, digital-output, adc, pwm |
| GPIO2 | GPIO/ADC | — | digital-input, digital-output, adc, pwm |
| GPIO3 | GPIO/ADC | — | digital-input, digital-output, adc, pwm |
| GPIO4 | GPIO/ADC | — | digital-input, digital-output, adc, pwm |
| GPIO5 | GPIO/ADC | — | digital-input, digital-output, adc, pwm |
| GPIO6 | GPIO/ADC | — | digital-input, digital-output, adc, pwm |
| GPIO7 | GPIO/ADC | — | digital-input, digital-output, adc, pwm |
| GPIO8 | GPIO | — | digital-input, digital-output, pwm |
| GPIO9 | GPIO | — | digital-input, digital-output, pwm |
| GPIO10 | GPIO | — | digital-input, digital-output, pwm |
| GPIO11 | GPIO | — | digital-input, digital-output, pwm |
| GPIO12 | GPIO | — | digital-input, digital-output, pwm |
| GPIO13 | GPIO | — | digital-input, digital-output, pwm |
| GPIO14 | GPIO | — | digital-input, digital-output, pwm |
| GPIO15 | GPIO | — | digital-input, digital-output, pwm |
| GPIO16 | GPIO | — | digital-input, digital-output, pwm |
| GPIO17 | GPIO | — | digital-input, digital-output, pwm |
| GPIO18 | GPIO | — | digital-input, digital-output, pwm |
| GPIO21 | GPIO | — | digital-input, digital-output, pwm |
| GPIO38 | GPIO | — | digital-input, digital-output, pwm |
| GPIO39 | GPIO | — | digital-input, digital-output, pwm |
| GPIO40 | GPIO | — | digital-input, digital-output, pwm |
| GPIO41 | GPIO | — | digital-input, digital-output, pwm |
| GPIO42 | GPIO | — | digital-input, digital-output, pwm |
| GPIO43 | GPIO/TX | — | digital-input, digital-output, pwm |
| GPIO44 | GPIO/RX | — | digital-input, digital-output, pwm |
| GPIO48 | GPIO/RGB LED | — | digital-input, digital-output, pwm |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2743.html&ref=openhardware.directory&product=dfrobot-romeo-esp32-s3&source=md-export) — 46.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2743.html&ref=openhardware.directory&product=dfrobot-romeo-esp32-s3&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-romeo-esp32-s3)

---

# Heltec MeshPocket

> Qi2 magnetic wireless charging power bank with integrated Meshtastic mesh networking node, featuring nRF52840 BLE + SX1262 LoRa radio and a 2.13" e-ink display. Available in 5000mAh and 10000mAh configurations.

## Quick Facts

- **Brand:** Heltec
- **Board Type:** power-bank
- **Price:** ~$59
- **CPU:** ARM Cortex-M4F @ 64MHz, FPU, DSP, HW crypto (CryptoCell-310)
- **RAM:** 256KB SRAM
- **Flash:** 1MB
- **USB:** USB-C (charging only)
- **Power:** 5V via USB-C,Qi2 wireless,Li-Po battery
- **Dimensions:** 102 x 74.1 x 10.8-17mm

## Connectivity

Bluetooth Bluetooth 5.0

## Components

- **nRF52840** (mcu): Nordic Semiconductor ARM Cortex-M4F SoC @ 64MHz with 1MB flash, 256KB RAM, Bluetooth 5.0, Thread, Zigbee, and USB 2.0 support. Serves as the main processor for Meshtastic firmware. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.nordicsemi.com%2Fbundle%2Fps_nrf52840%2Fpage%2Fkeyfeatures_html5.html&ref=openhardware.directory&product=heltec-meshpocket&source=md-export)
- **SX1262** (radio): Semtech long-range LoRa transceiver operating at 863-870MHz or 902-928MHz with up to +22dBm output power and 4.2mA receive current. Provides mesh communication range up to 10km. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=heltec-meshpocket&source=md-export)
- **LCMEN2R13ECC1** (e-ink-driver): 2.13-inch monochrome e-ink display panel providing sunlight-readable output with ultra-low power consumption — only draws power during screen refreshes. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FMeshPocket%2Fschematic%2FLCMEN2R13ECC1.pdf&ref=openhardware.directory&product=heltec-meshpocket&source=md-export)

## Protocols

- **SPI**: SCK=nRF52840 internal, MOSI=nRF52840 internal, MISO=nRF52840 internal
- **UART**: TX=Pogo pin, RX=Pogo pin
- **BLE**

## Where to Buy

- [Heltec Official](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fmeshpocket%2F&ref=openhardware.directory&product=heltec-meshpocket&source=md-export) — 59.00
- [Rokland](https://openhardware.directory/r?to=https%3A%2F%2Fstore.rokland.com%2Fproducts%2Fheltec-meshpocket-qi2-magnetic-charging-power-bank-meshtastic-compatible&ref=openhardware.directory&product=heltec-meshpocket&source=md-export) — 78.97
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-MeshPocket-Meshtastic-Compatible-Emergency%2Fdp%2FB0F7LD3BQG&ref=openhardware.directory&product=heltec-meshpocket&source=md-export) — 59.00
- [Muzi Works](https://openhardware.directory/r?to=https%3A%2F%2Fmuzi.works%2Fproducts%2Fheltec-meshpocket&ref=openhardware.directory&product=heltec-meshpocket&source=md-export) — 59.00
- [Meshnology](https://openhardware.directory/r?to=https%3A%2F%2Fmeshnology.com%2Fproducts%2Fheltec-meshpocket-magnetic-charging-power-bank-w-meshtastic-lora-antenna&ref=openhardware.directory&product=heltec-meshpocket&source=md-export) — 59.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fmeshpocket%2F&ref=openhardware.directory&product=heltec-meshpocket&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltec_nRF52&ref=openhardware.directory&product=heltec-meshpocket&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.org%2Fen%2Fready_to_use%2Fmeshpocket%2Findex.html&ref=openhardware.directory&product=heltec-meshpocket&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FMeshPocket%2Fdatasheet%2FMeshPocket_1.0.1.pdf&ref=openhardware.directory&product=heltec-meshpocket&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FMeshPocket%2Fschematic%2FMeshPocket_nRF52840%252BSX1262.pdf&ref=openhardware.directory&product=heltec-meshpocket&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/heltec-meshpocket)

---

# Arduino Nano ESP32

> Arduino Nano form factor powered by ESP32-S3 with WiFi 802.11 b/g/n, Bluetooth LE 5.0, dual-core Xtensa LX7 at 240MHz, 8MB flash, 512KB SRAM, USB-C, and HID support — Arduino's compact IoT powerhouse with MicroPython support.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$18.5
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **USB:** USB-C 2.0 (OTG)
- **Power:** 5V via USB-C or Vin
- **Dimensions:** 45 × 18mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- esp-idf

## Components

- **ESP32-S3-MINI-1-N8** (mcu): Espressif ESP32-S3 with Xtensa LX7 dual-core at 240MHz, 8MB flash, WiFi 802.11 b/g/n, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-mini-1_mini-1u_datasheet_en.pdf&ref=openhardware.directory&product=arduino-nano-esp32&source=md-export)

## Protocols

- **SPI**: MOSI=D11, MISO=D12, SCK=D13, SS=D10
- **I2C**: SDA=A4, SCL=A5
- **UART**: TX=D1, RX=D0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX | — | digital-input, digital-output |
| D1 | UART TX | — | digital-input, digital-output |
| D2 | Digital I/O | — | digital-input, digital-output, pwm |
| D3 | Digital I/O | — | digital-input, digital-output, pwm |
| D4 | Digital I/O | — | digital-input, digital-output, pwm |
| D5 | Digital I/O | — | digital-input, digital-output, pwm |
| D6 | Digital I/O | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output, pwm |
| D8 | Digital I/O | — | digital-input, digital-output, pwm |
| D9 | Digital I/O | — | digital-input, digital-output, pwm |
| D10 | SPI SS | — | digital-input, digital-output, pwm |
| D11 | SPI MOSI | — | digital-input, digital-output, pwm |
| D12 | SPI MISO | — | digital-input, digital-output, pwm |
| D13 | SPI SCK | — | digital-input, digital-output, pwm |
| A0 | Analog Input | — | digital-input, digital-output, adc, pwm |
| A1 | Analog Input | — | digital-input, digital-output, adc, pwm |
| A2 | Analog Input | — | digital-input, digital-output, adc, pwm |
| A3 | Analog Input | — | digital-input, digital-output, adc, pwm |
| A4 | I2C SDA / Analog | — | digital-input, digital-output, adc, pwm |
| A5 | I2C SCL / Analog | — | digital-input, digital-output, adc, pwm |
| A6 | Analog Input | — | digital-input, digital-output, adc, pwm |
| A7 | Analog Input | — | digital-input, digital-output, adc, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fnano-esp32&ref=openhardware.directory&product=arduino-nano-esp32&source=md-export) — $18.50
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnano-esp32&ref=openhardware.directory&product=arduino-nano-esp32&source=md-export) — €20.40
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FABX00092%2F20371542&ref=openhardware.directory&product=arduino-nano-esp32&source=md-export) — $20.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FABX00092&ref=openhardware.directory&product=arduino-nano-esp32&source=md-export) — $20.00
- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB0C947BHK5&ref=openhardware.directory&product=arduino-nano-esp32&source=md-export) — $20.00
- [SparkFun](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sparkfun.com%2Farduino-nano-esp32.html&ref=openhardware.directory&product=arduino-nano-esp32&source=md-export) — $20.00
- [The Pi Hut (UK)](https://openhardware.directory/r?to=https%3A%2F%2Fthepihut.com%2Fproducts%2Farduino-nano-esp32&ref=openhardware.directory&product=arduino-nano-esp32&source=md-export) — £16.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnano-esp32&ref=openhardware.directory&product=arduino-nano-esp32&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fnano-esp32%2F&ref=openhardware.directory&product=arduino-nano-esp32&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FABX00092-datasheet.pdf&ref=openhardware.directory&product=arduino-nano-esp32&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fschematics%2FABX00092-schematics.pdf&ref=openhardware.directory&product=arduino-nano-esp32&source=md-export)

## Tags

`arduino`, `nano`, `esp32-s3`, `wifi`, `ble`, `iot`, `micropython`, `usb-c`

---
[View full device page](https://openhardware.directory/s/1370/arduino-nano-esp32)

---

# LILYGO T-Pico C3

> Dual-MCU board combining RP2040 and ESP32-C3, with a 1.14-inch ST7789V display, WiFi, BLE 5.0, and Arduino/MicroPython support — bringing Raspberry Pi Pico connectivity to wireless IoT projects.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$9.2
- **CPU:** ARM Cortex-M0+ dual-core @ 133MHz (RP2040) + RISC-V single-core @ 160MHz (ESP32-C3)
- **RAM:** 264KB SRAM
- **Flash:** 4MB
- **USB:** USB-C 2.0
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- platformio

## Components

- **RP2040** (mcu): Raspberry Pi RP2040 dual-core ARM Cortex-M0+ at 133MHz with 264KB SRAM, flexible PIO state machines, and 30 GPIO pins. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=lilygo-t-pico&source=md-export)
- **ESP32-C3** (mcu): Espressif ESP32-C3 RISC-V single-core at 160MHz providing WiFi 802.11 b/g/n and BLE 5.0 as a wireless coprocessor. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-pico&source=md-export)
- **ST7789V** (display-driver): Sitronix ST7789V TFT LCD driver for the 1.14-inch 135×240 IPS panel via 4-wire SPI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7789.pdf&ref=openhardware.directory&product=lilygo-t-pico&source=md-export)

## Protocols

- **SPI**: MOSI=GP19, CLK=GP18, CS=GP17, DC=GP16
- **I2C**: SDA=GP20, SCL=GP21
- **UART**: TX=GP0, RX=GP1

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GP0 | UART TX / Free GPIO | — | digital-input, digital-output |
| GP1 | UART RX / Free GPIO | — | digital-input |
| GP2 | Free GPIO | — | digital-input, digital-output, pwm |
| GP3 | Free GPIO | — | digital-input, digital-output, pwm |
| GP4 | Free GPIO / I2C SDA | — | digital-input, digital-output |
| GP5 | Free GPIO / I2C SCL | — | digital-input, digital-output |
| GP16 | Display DC | — | digital-output |
| GP17 | Display CS | — | digital-output |
| GP18 | SPI CLK | — | digital-output |
| GP19 | SPI MOSI | — | digital-output |
| GP20 | I2C SDA | — | digital-input, digital-output |
| GP21 | I2C SCL | — | digital-output |
| GP26 | ADC0 / Free GPIO | — | digital-input, digital-output, adc |
| GP27 | ADC1 / Free GPIO | — | digital-input, digital-output, adc |
| GP28 | ADC2 / Free GPIO | — | digital-input, digital-output, adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-pico&ref=openhardware.directory&product=lilygo-t-pico&source=md-export) — $9.20

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-pico&ref=openhardware.directory&product=lilygo-t-pico&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-PicoC3&ref=openhardware.directory&product=lilygo-t-pico&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-pico&source=md-export)

## Tags

`rp2040`, `esp32-c3`, `dual-mcu`, `lilygo`, `display`, `wifi`, `ble`, `pico`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-pico)

---

# LILYGO T-Display AMOLED Lite

> Compact ESP32-S3 development board featuring a 1.47" RM67162 AMOLED display with QSPI interface, 16MB Flash, 8MB PSRAM, Wi-Fi, Bluetooth 5, and battery charging support.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$35.66
- **CPU:** ESP32-S3R8
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n 2.4 GHz | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- esp-idf

## Components

- **ESP32-S3R8** (mcu): Dual-core Xtensa LX7 MCU running at up to 240 MHz with 8MB PSRAM, Wi-Fi 802.11 b/g/n and Bluetooth 5 LE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-display-amoled-lite&source=md-export)
- **RM67162** (display-driver): 1.47-inch AMOLED display driver IC with QSPI interface, 194×368 resolution, IPS full viewing angle — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-AMOLED-Series%2Fblob%2Fmaster%2Fdatasheet%2FRM67162.pdf&ref=openhardware.directory&product=lilygo-t-display-amoled-lite&source=md-export)

## Protocols

- **QSPI**
- **I2C**
- **SPI**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-amoled-lite&ref=openhardware.directory&product=lilygo-t-display-amoled-lite&source=md-export) — $35.66

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-amoled-lite&ref=openhardware.directory&product=lilygo-t-display-amoled-lite&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-AMOLED-Series&ref=openhardware.directory&product=lilygo-t-display-amoled-lite&source=md-export)

## Tags

`esp32-s3`, `amoled`, `display`, `wifi`, `bluetooth`, `battery`, `lilygo`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-display-amoled-lite)

---

# LILYGO T-Mini E-Paper S3

> LILYGO T-Mini E-Paper S3 is a compact ESP32-S3 board with a 1.02-inch 128×80 e-paper display, 4MB flash, 2MB PSRAM, WiFi, BLE 5, TF card slot, and support for 18350 battery. Available in 868MHz and 915MHz variants.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$40.81
- **CPU:** Xtensa LX7 dual-core @ 240MHz
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V + Li-Ion 18650

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio

## Components

- **ESP32-S3FN4R2** (mcu): Espressif ESP32-S3FN4R2 dual-core Xtensa LX7 MCU with 4MB flash, 2MB PSRAM, WiFi 802.11 b/g/n, and Bluetooth 5 LE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-mini-epaper-s3&source=md-export)
- **GDGDEWG102T4** (display-driver): Good Display GDGDEWG102T4 e-paper display driver for 128×80 pixel monochrome output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.good-display.com%2Fproduct%2F426.html&ref=openhardware.directory&product=lilygo-t-mini-epaper-s3&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-mini-epaper-s3&ref=openhardware.directory&product=lilygo-t-mini-epaper-s3&source=md-export) — $40.81

## Available Software

- [GxEPD2](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FZinggJM%2FGxEPD2&ref=openhardware.directory&product=lilygo-t-mini-epaper-s3&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-mini-epaper-s3&ref=openhardware.directory&product=lilygo-t-mini-epaper-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T5-Epaper-Series&ref=openhardware.directory&product=lilygo-t-mini-epaper-s3&source=md-export)

## Tags

`e-paper`, `e-ink`, `esp32-s3`, `1.02-inch`, `compact`, `18350-battery`, `tf-card`, `ble5`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-mini-epaper-s3)

---

# LILYGO T-Connect

> ESP32-S3 industrial communication board with three RS485 ports and one CAN bus — enables multi-protocol data switching for automation, sensor networks, and legacy equipment integration.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$37.99
- **CPU:** ESP32-S3-R8 Xtensa LX7 dual-core @ 240MHz
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio

## Components

- **ESP32-S3R8** (mcu): Espressif ESP32-S3-R8 dual-core Xtensa LX7 at 240MHz with 8MB PSRAM, 2.4GHz WiFi, and Bluetooth 5 LE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-connect&source=md-export)
- **RS485 x3** (interface): Three independent RS485 serial communication ports for industrial sensor networks and Modbus devices, 35m range at 115200 baud. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Connect&ref=openhardware.directory&product=lilygo-t-connect&source=md-export)
- **CAN Bus** (interface): One CAN bus interface for vehicle and industrial communication, 35m range at 500 kbps. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Connect&ref=openhardware.directory&product=lilygo-t-connect&source=md-export)

## Protocols

- **RS-485**
- **CAN**
- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-connect&ref=openhardware.directory&product=lilygo-t-connect&source=md-export) — $37.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-connect&ref=openhardware.directory&product=lilygo-t-connect&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Connect&ref=openhardware.directory&product=lilygo-t-connect&source=md-export)

## Tags

`esp32-s3`, `can-bus`, `rs485`, `industrial`, `lilygo`, `wifi`, `ble5`, `automation`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-connect)

---

# LILYGO T-Display K230

> AI-capable development board powered by KENDRYTE K230 dual-core 64-bit RISC-V SoC running at 1.6GHz with KPU neural network accelerator, 4.1" AMOLED display, and LoRa connectivity in multiple frequency bands.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** K230
- **Price:** ~$98.79
- **CPU:** Canaan K230 Dual-core RISC-V (1.6GHz + 800MHz)
- **RAM:** 512MB LPDDR4
- **Flash:** 16MB eMMC
- **USB:** USB-C
- **Power:** 5V
- **Dimensions:** 104 x 51 x 15.5mm

## Compatible Firmware

- micropython

## Components

- **K230** (mcu): Dual-core 64-bit RISC-V SoC at 1.6GHz + 800MHz with integrated KPU, DPU, GPU, VPU for AI inference and media processing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.canaan-creative.com%2Fk230%2Fdev%2Fzh%2FCanMV_K230_&ref=openhardware.directory&product=lilygo-t-display-k230&source=md-export)
- **RM69A10** (display-driver): 4.1-inch AMOLED display driver IC providing 568x1232 RGB resolution — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raydium.com.tw%2Fproduct%2Fdetail%2Fitem%2F86%2F&ref=openhardware.directory&product=lilygo-t-display-k230&source=md-export)
- **SX1262** (radio): Long-range LoRa radio transceiver available in 433/868/915/923MHz variants — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-display-k230&source=md-export)

## Protocols

- **UART**
- **I2C**
- **SPI**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-k230&ref=openhardware.directory&product=lilygo-t-display-k230&source=md-export) — $98.79

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-k230&ref=openhardware.directory&product=lilygo-t-display-k230&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Display-K230_canmv_rt&ref=openhardware.directory&product=lilygo-t-display-k230&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.canaan-creative.com%2Fk230%2Fdev%2Fzh%2FCanMV_K230_&ref=openhardware.directory&product=lilygo-t-display-k230&source=md-export)

## Tags

`k230`, `risc-v`, `ai`, `kpu`, `amoled`, `lora`, `micropython`, `canmv`, `edge-ai`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-display-k230)

---

# LILYGO T3 S3 LR1121

> LILYGO T3 S3 LR1121 is an ESP32-S3 development board with a Semtech LR1121 multi-band transceiver supporting sub-GHz (830–940 MHz) and 2.4 GHz LoRa, plus a 0.96" OLED display and microSD card slot.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$23.98
- **CPU:** ESP32S3FH4R2
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-S3FH4R2** (mcu): ESP32-S3 dual-core LX7 microcontroller with 4MB flash, 2MB PSRAM, Wi-Fi, and Bluetooth 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t3-s3-lr1121&source=md-export)
- **LR1121** (radio): Semtech LR1121 multi-band transceiver supporting sub-GHz (830–940 MHz) and 2.4 GHz LoRa bands for flexible global deployment — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2Fds_lr1121.pdf&ref=openhardware.directory&product=lilygo-t3-s3-lr1121&source=md-export)
- **SSD1306** (display-driver): 0.96 inch SSD1306 I2C OLED display with 128x64 resolution, connected via I2C (SDA: IO18, SCL: IO17) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t3-s3-lr1121&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **GPIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft3-s3-lr1121&ref=openhardware.directory&product=lilygo-t3-s3-lr1121&source=md-export) — $23.98

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft3-s3-lr1121&ref=openhardware.directory&product=lilygo-t3-s3-lr1121&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-LoRa-Series&ref=openhardware.directory&product=lilygo-t3-s3-lr1121&source=md-export)

## Tags

`esp32-s3`, `lr1121`, `lora`, `multi-band`, `2.4ghz`, `sub-ghz`, `oled`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t3-s3-lr1121)

---

# LILYGO T-Lite W5500

> Ultra-compact ESP32 development board with W5500 SPI Ethernet, 0.96" OLED display, Wi-Fi, Bluetooth 4.2, and USB-C. Only 29.5×23mm for embedded IoT gateway projects.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$10.72
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V
- **Dimensions:** 29.5 × 23 × 8mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2 | Ethernet 10/100 Mbps W5500

## Compatible Firmware

- arduino
- esp-idf
- platformio

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 at up to 240MHz with 520KB SRAM, Wi-Fi b/g/n and Bluetooth 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-lite-w5500&source=md-export)
- **W5500** (ethernet-phy): SPI hardwired TCP/IP Ethernet chip supporting TCP, UDP, ICMP, IPv4, ARP, IGMP, PPPoE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wiznet.io%2Fwp-content%2Fuploads%2Fwizdoc%2FW5500_DS_V109E.pdf&ref=openhardware.directory&product=lilygo-t-lite-w5500&source=md-export)
- **SSD1306** (display-driver): 0.96-inch 128×64 monochrome OLED display controller — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t-lite-w5500&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **TCP/IP**
- **MQTT**
- **HTTP**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-lite-w5500&ref=openhardware.directory&product=lilygo-t-lite-w5500&source=md-export) — $10.72

## Available Software

- [Arduino IDE](https://openhardware.directory/r?to=https%3A%2F%2Fwww.arduino.cc%2F&ref=openhardware.directory&product=lilygo-t-lite-w5500&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-lite-w5500&ref=openhardware.directory&product=lilygo-t-lite-w5500&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-W5500-Lite&ref=openhardware.directory&product=lilygo-t-lite-w5500&source=md-export)

## Tags

`esp32`, `ethernet`, `w5500`, `oled`, `compact`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-lite-w5500)

---

# LILYGO T5 4.7-inch E-Paper V2.3

> ESP32-S3 e-paper development board with 4.7-inch 540×960 16-grayscale display (EDO47TC1), Wi-Fi, Bluetooth 5.0, PCF8563 RTC, 16MB flash, 8MB PSRAM, and optional capacitive touch overlay.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$39.99
- **CPU:** ESP32-S3-WROOM-1-N16R8
- **Flash:** 16MB
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3-WROOM-1-N16R8** (mcu): Dual-core Xtensa LX7 at 240MHz with 16MB flash, 8MB PSRAM OPI, Wi-Fi and BLE 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t5-4-7-e-paper-v2-3&source=md-export)
- **ED047TC1** (display-driver): 4.7-inch e-paper display driver IC; 540×960 resolution; 16 gray levels; ultra-wide viewing angle; low power consumption — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.good-display.com%2Fcompanyfile%2FGDEW047T2.pdf&ref=openhardware.directory&product=lilygo-t5-4-7-e-paper-v2-3&source=md-export)
- **PCF8563** (rtc): NXP PCF8563 low-power RTC with I2C interface for timekeeping in low-power applications — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FPCF8563.pdf&ref=openhardware.directory&product=lilygo-t5-4-7-e-paper-v2-3&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft5-4-7-inch-e-paper-v2-3&ref=openhardware.directory&product=lilygo-t5-4-7-e-paper-v2-3&source=md-export) — $39.99

## Available Software

- [Arduino IDE](https://openhardware.directory/r?to=https%3A%2F%2Fwww.arduino.cc%2F&ref=openhardware.directory&product=lilygo-t5-4-7-e-paper-v2-3&source=md-export)
- [LilyGo-EPD47](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-EPD47&ref=openhardware.directory&product=lilygo-t5-4-7-e-paper-v2-3&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft5-4-7-inch-e-paper-v2-3&ref=openhardware.directory&product=lilygo-t5-4-7-e-paper-v2-3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-EPD47%2Ftree%2Fesp32s3&ref=openhardware.directory&product=lilygo-t5-4-7-e-paper-v2-3&source=md-export)

## Tags

`esp32-s3`, `e-paper`, `epaper`, `e-ink`, `4-7-inch`, `low-power`, `rtc`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t5-4-7-e-paper-v2-3)

---

# HuskyLens AI Camera

> AI-powered vision sensor with built-in Kendryte K210 processor. Supports face recognition, object tracking, object recognition, line following, color recognition, and tag recognition via I2C or UART.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** ai-camera
- **Price:** ~$69
- **CPU:** Kendryte K210
- **RAM:** 8 MB SRAM
- **Flash:** 16MB
- **Power:** 3.3-5V via Gravity connector

## Components

- **Kendryte K210** (processor): Dual-core 64-bit RISC-V processor at 400MHz with hardware KPU (neural network accelerator) and FFT accelerator for on-device AI inference — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sipeed.com%2FK210%2FHDK%2FKendryte%2520K210%2520Datasheet.pdf&ref=openhardware.directory&product=huskylens-ai-camera&source=md-export)
- **OV2640** (camera): OmniVision 2-megapixel CMOS image sensor providing real-time video input for AI vision processing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2FOV2640_DS.pdf&ref=openhardware.directory&product=huskylens-ai-camera&source=md-export)
- **2-inch IPS LCD** (display): 320x240 pixel IPS LCD screen for real-time visual feedback showing camera feed and AI detection results — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FHUSKYLENS_V1.0_SKU_SEN0305_SEN0336&ref=openhardware.directory&product=huskylens-ai-camera&source=md-export)

## Protocols

- **I2C**
- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fhuskylens-ai-camera&ref=openhardware.directory&product=huskylens-ai-camera&source=md-export) — $69

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1922.html&ref=openhardware.directory&product=huskylens-ai-camera&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHuskyLens%2FHUSKYLENSArduino&ref=openhardware.directory&product=huskylens-ai-camera&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FHUSKYLENS_V1.0_SKU_SEN0305_SEN0336&ref=openhardware.directory&product=huskylens-ai-camera&source=md-export)

## Tags

`ai-camera`, `computer-vision`, `face-recognition`, `object-tracking`, `k210`, `education`, `i2c`, `uart`

---
[View full device page](https://openhardware.directory/s/1370/huskylens-ai-camera)

---

# CircuitMess Chatter 2.0

> DIY encrypted LoRa communicator kit building a pair of devices for off-grid text messaging up to 2km range. Features ESP32, LLCC68 LoRa radio, and 160×128 TFT display.

## Quick Facts

- **Brand:** circuitmess
- **Board Type:** communicator
- **Price:** ~$217
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** LiPo battery, USB-C charging

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- circuitblocks
- meshtastic

## Components

- **ESP32-WROOM-32** (mcu): Espressif ESP32-WROOM-32 module with dual-core Xtensa LX6 at 240MHz, WiFi 802.11 b/g/n, BLE 4.2, 520KB SRAM, and 4MB flash. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=circuitmess-chatter-2-0&source=md-export)
- **LLCC68** (radio): Semtech LLCC68 LoRa transceiver operating at 868MHz for long-range encrypted messaging up to 2km. Supports LoRa and FSK modulation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fllcc68&ref=openhardware.directory&product=circuitmess-chatter-2-0&source=md-export)
- **ST7735S** (display-driver): Sitronix ST7735S TFT LCD controller driving a 160×128 pixel color display over SPI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7735.pdf&ref=openhardware.directory&product=circuitmess-chatter-2-0&source=md-export)
- **74HC165** (io-expander): Two daisy-chained 74HC165 parallel-in/serial-out shift registers reading the 16-button keypad via 3 GPIO pins (DATA, CLOCK, LOAD). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fsn74hc165.pdf&ref=openhardware.directory&product=circuitmess-chatter-2-0&source=md-export)

## Protocols

- **SPI (LoRa)** (HSPI): SCK=GPIO16, MISO=GPIO17, MOSI=GPIO5, CS=GPIO14
- **Shift Register**: DATA=GPIO23, CLOCK=GPIO22, LOAD=GPIO21

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO16 | LoRa SCK | — | digital-output |
| GPIO17 | LoRa MISO | — | digital-input |
| GPIO5 | LoRa MOSI | — | digital-output |
| GPIO14 | LoRa CS | — | digital-output |
| GPIO4 | LoRa BUSY | — | digital-input |
| GPIO18 | LoRa DIO1 | — | digital-input |
| GPIO23 | Keypad Data | — | digital-input |
| GPIO22 | Keypad Clock | — | digital-output |
| GPIO21 | Keypad Load | — | digital-output |
| GPIO32 | Backlight | — | digital-output, pwm |
| GPIO19 | Buzzer | — | digital-output, pwm |
| GPIO34 | Battery ADC | — | input-only, adc |
| GPIO36 | Wake Button | — | input-only |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [CircuitMess](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitmess.com%2Fproducts%2Fchatter-2-0&ref=openhardware.directory&product=circuitmess-chatter-2-0&source=md-export) — €199.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitmess.com%2Fproducts%2Fchatter-2-0&ref=openhardware.directory&product=circuitmess-chatter-2-0&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FCircuitMess%2FChatter2-Firmware&ref=openhardware.directory&product=circuitmess-chatter-2-0&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fmeshtastic.org%2Fdocs%2Fhardware%2Fdevices%2Fcommunity-supported%2Fchatter%2F&ref=openhardware.directory&product=circuitmess-chatter-2-0&source=md-export)

## Tags

`circuitmess`, `lora`, `communicator`, `esp32`, `diy-kit`, `stem`, `encrypted`

---
[View full device page](https://openhardware.directory/s/1370/circuitmess-chatter-2-0)

---

# Sonoff MINIR4 Extreme

> Ultra-compact ESP32-C3 WiFi smart switch module with 10A relay, detached switch mode, and the smallest form factor in its class. Fits any wall box. Flashable with Tasmota for local control.

## Quick Facts

- **Brand:** Sonoff
- **Board Type:** relay-module
- **Price:** ~$9.99
- **CPU:** ESP32-C3
- **RAM:** 400KB SRAM
- **Flash:** 4MB
- **Power:** 100-240V AC

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- eWeLink
- tasmota
- esphome

## Components

- **ESP32-C3** (Microcontroller): Single-core 32-bit RISC-V microcontroller at 160MHz with integrated WiFi 802.11 b/g/n and Bluetooth 5.0 LE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=sonoff-minir4-extreme&source=md-export)
- **10A Relay** (Relay): Single-pole single-throw relay rated for 10A at 240V AC, suitable for most household lighting and appliance loads — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fdiy-smart-switches%2Fminir4%2F&ref=openhardware.directory&product=sonoff-minir4-extreme&source=md-export)
- **AC-DC Converter** (Power Supply): Integrated 100-240V AC to 3.3V DC converter powering the ESP32-C3 module — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fdiy-smart-switches%2Fminir4%2F&ref=openhardware.directory&product=sonoff-minir4-extreme&source=md-export)

## Protocols

- **WiFi 802.11 b/g/n**
- **Bluetooth 5.0 LE**
- **MQTT**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fdiy-smart-switches%2Fminir4%2F&ref=openhardware.directory&product=sonoff-minir4-extreme&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Ftemplates.blakadder.com%2Fsonoff_MINIR4.html&ref=openhardware.directory&product=sonoff-minir4-extreme&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Farendst%2FTasmota&ref=openhardware.directory&product=sonoff-minir4-extreme&source=md-export)

## Tags

`esp32-c3`, `wifi`, `bluetooth`, `tasmota`, `esphome`, `relay`, `smart-switch`, `home-automation`, `sonoff`, `compact`

---
[View full device page](https://openhardware.directory/s/1370/sonoff-minir4-extreme)

---

# LuckFox Pico 86 Panel

> Standard 86-type wall-mount smart panel with 4-inch 720x720 IPS capacitive touch display, Rockchip RV1106 SoC, 2-channel relay with optocoupler isolation, RS485, 100M Ethernet, onboard speaker and microphone, wide 6-30V DC input. Designed for smart home control and HMI applications.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** smart-panel
- **Price:** ~$55.99
- **CPU:** ARM Cortex-A7 @ 1.2GHz + RISC-V MCU, up to 1 TOPS NPU
- **RAM:** 256MB DDR3L
- **Flash:** 8GB eMMC
- **USB:** USB-C (power/programming)
- **Power:** DC 6-30V (screw terminal)
- **Dimensions:** 84 × 84mm (display area: 71.93 × 71.93mm)

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth Bluetooth 5.2 | Ethernet 10/100 Mbps

## Components

- **RV1106** (soc): Rockchip RV1106 SoC with ARM Cortex-A7 @ 1.2GHz, RISC-V MCU, up to 1 TOPS NPU, ISP 3.2, integrated audio codec and Ethernet MAC PHY. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Frockchips.net%2Fwp-content%2Fuploads%2F2025%2F03%2FRockchip-RV1106-Datasheet-V1.7-20231218.pdf&ref=openhardware.directory&product=waveshare-luckfox-pico-86-panel&source=md-export)
- **GT911** (touch-controller): Goodix GT911 capacitive touch controller supporting 5-point multi-touch input on the 4-inch IPS display. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.goodix.com%2Fen%2Fproduct%2Ftouch%2Fcapacitive_touch%2FGT911&ref=openhardware.directory&product=waveshare-luckfox-pico-86-panel&source=md-export)

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-pico-86-panel.htm&ref=openhardware.directory&product=waveshare-luckfox-pico-86-panel&source=md-export) — 55.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-pico-86-panel.htm&ref=openhardware.directory&product=waveshare-luckfox-pico-86-panel&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=waveshare-luckfox-pico-86-panel&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Pico-86-Panel&ref=openhardware.directory&product=waveshare-luckfox-pico-86-panel&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Frockchips.net%2Fwp-content%2Fuploads%2F2025%2F03%2FRockchip-RV1106-Datasheet-V1.7-20231218.pdf&ref=openhardware.directory&product=waveshare-luckfox-pico-86-panel&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-luckfox-pico-86-panel)

---

# Adafruit MACROPAD RP2040

> RP2040-powered 3×4 mechanical macropad with 12 NeoPixels, a 128×64 OLED display, rotary encoder, speaker, and STEMMA QT — fully programmable via CircuitPython or Arduino.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** macropad
- **Price:** ~$34.95
- **CPU:** ARM Cortex-M0+ dual-core @ 130 MHz (RP2040)
- **RAM:** 264 KB SRAM
- **Flash:** 8MB SiP
- **Power:** 5V
- **Dimensions:** 104 × 59.5 × 29 mm

## Compatible Firmware

- circuitpython
- arduino
- pico-sdk
- KMK
- qmk

## Components

- **RP2040** (mcu): Raspberry Pi RP2040 dual-core ARM Cortex-M0+ at ~130 MHz with 264 KB SRAM, PIO state machines, and native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=adafruit-macropad-rp2040&source=md-export)
- **SH1106** (display-driver): Sino Wealth SH1106 SPI/I2C controller driving the 128×64 monochrome OLED panel. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FSH1106.pdf&ref=openhardware.directory&product=adafruit-macropad-rp2040&source=md-export)
- **WS2812B** (led): 12 individual WS2812B addressable RGB LEDs, one under each key switch for per-key backlighting. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=adafruit-macropad-rp2040&source=md-export)

## Protocols

- **I2C**: SDA=GPIO16, SCL=GPIO17
- **USB**
- **SPI**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | KEY1 — key matrix | — | digital-input, digital-output |
| GPIO1 | KEY2 — key matrix | — | digital-input, digital-output |
| GPIO2 | KEY3 — key matrix | — | digital-input, digital-output |
| GPIO3 | KEY4 — key matrix | — | digital-input, digital-output |
| GPIO4 | KEY5 — key matrix | — | digital-input, digital-output |
| GPIO5 | KEY6 — key matrix | — | digital-input, digital-output |
| GPIO6 | KEY7 — key matrix | — | digital-input, digital-output |
| GPIO7 | KEY8 — key matrix | — | digital-input, digital-output |
| GPIO8 | KEY9 — key matrix | — | digital-input, digital-output |
| GPIO9 | KEY10 — key matrix | — | digital-input, digital-output |
| GPIO10 | KEY11 — key matrix | — | digital-input, digital-output |
| GPIO11 | KEY12 — key matrix | — | digital-input, digital-output |
| GPIO16 | SDA — I2C (STEMMA QT/OLED) | — | digital-input, digital-output |
| GPIO17 | SCL — I2C (STEMMA QT/OLED) | — | digital-input, digital-output |
| GPIO17 | NeoPixel data | — | digital-output |
| GPIO20 | Encoder A | — | digital-input, pwm |
| GPIO24 | Encoder B | — | digital-input, pwm |
| GPIO26 | A0 — ADC/Speaker | — | analog-input, digital-input, digital-output, pwm |
| GPIO28 | A2 — ADC | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5100&ref=openhardware.directory&product=adafruit-macropad-rp2040&source=md-export) — 34.95

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_macropad_rp2040%2F&ref=openhardware.directory&product=adafruit-macropad-rp2040&source=md-export)
- [KMK Firmware](https://openhardware.directory/r?to=https%3A%2F%2Fkmkfw.io%2F&ref=openhardware.directory&product=adafruit-macropad-rp2040&source=md-export)
- [Arduino](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fearlephilhower%2Farduino-pico&ref=openhardware.directory&product=adafruit-macropad-rp2040&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5100&ref=openhardware.directory&product=adafruit-macropad-rp2040&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-MACROPAD-RP2040-PCB&ref=openhardware.directory&product=adafruit-macropad-rp2040&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-macropad-rp2040&ref=openhardware.directory&product=adafruit-macropad-rp2040&source=md-export)

## Tags

`rp2040`, `macropad`, `mechanical-keyboard`, `neopixel`, `oled`, `rotary-encoder`, `circuitpython`, `qmk`, `stemma-qt`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-macropad-rp2040)

---

# Pycom LoPy 1.0

> ESP32-based MicroPython module combining 802.11b/g/n WiFi, Bluetooth, and LoRa/LoRaWAN (868/915 MHz) in one board. Can act as a nano LoRa gateway and is 100% Python programmable for multi-protocol IoT deployments.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** module
- **Price:** ~$39.95
- **CPU:** ESP32 dual-core Xtensa LX6 @ 240 MHz
- **RAM:** 4MB
- **Flash:** 8MB
- **Power:** 3.3V-5.5V via pin / USB via Expansion Board
- **Dimensions:** 55.3 × 20.0 × 3.0 mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.0

## Compatible Firmware

- micropython

## Components

- **ESP32** (mcu): Espressif ESP32 dual-core Xtensa LX6 at 240MHz with integrated WiFi 802.11b/g/n and Bluetooth. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=pycom-lopy-10&source=md-export)
- **SX1272** (lora-module): Semtech SX1272 LoRa radio module providing LoRa and LoRaWAN connectivity on 868/915 MHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fuploads%2Fdocuments%2Fsx1272.pdf&ref=openhardware.directory&product=pycom-lopy-10&source=md-export)

## Protocols

- **SPI**: MOSI=GPIO12, MISO=GPIO19, SCK=GPIO20
- **I2C**: SDA=GPIO14, SCL=GPIO13
- **UART**: TX=GPIO16, RX=GPIO15
- **I2S**
- **802.11 b/g/n**
- **BLE**
- **LoRa**
- **LoRaWAN**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO18 | P0 — GPIO / Analog In | — | digital-input, digital-output, analog-input |
| GPIO17 | P1 — GPIO / Analog In | — | digital-input, digital-output, analog-input |
| GPIO16 | P2 — GPIO / UART TX | — | digital-input, digital-output |
| GPIO15 | P3 — GPIO / UART RX | — | digital-input, digital-output |
| GPIO14 | P4/SDA — GPIO / I2C SDA | — | digital-input, digital-output |
| GPIO13 | P5/SCL — GPIO / I2C SCL | — | digital-input, digital-output |
| GPIO12 | P6/MOSI — GPIO / SPI MOSI | — | digital-input, digital-output |
| GPIO19 | P7/MISO — GPIO / SPI MISO | — | digital-input, digital-output |
| GPIO20 | P8/CLK — GPIO / SPI CLK | — | digital-input, digital-output |
| GPIO21 | P9 — GPIO | — | digital-input, digital-output |
| GPIO22 | P10 — GPIO | — | digital-input, digital-output |

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3339&ref=openhardware.directory&product=pycom-lopy-10&source=md-export) — 39.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3339&ref=openhardware.directory&product=pycom-lopy-10&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.pycom.io%2Fdatasheets%2Fdevelopment%2Flopy%2F&ref=openhardware.directory&product=pycom-lopy-10&source=md-export)

## Tags

`pycom`, `esp32`, `lora`, `lorawan`, `micropython`, `wifi`, `bluetooth`, `nano-gateway`

---
[View full device page](https://openhardware.directory/s/1370/pycom-lopy-10)

---

# Adafruit Feather ESP32-S3

> Feather-format ESP32-S3 board with native USB, WiFi, BLE 5.0, 8MB flash, LiPo charging, and full Feather ecosystem compatibility — a capable wireless development platform for CircuitPython and Arduino projects.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$17.5
- **CPU:** Xtensa LX7 single-core @ 240MHz (ESP32-S3)
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **USB:** USB-C (native USB OTG/CDC/HID)
- **Power:** USB-C 5V or LiPo battery

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- esp-idf
- arduino
- micropython
- circuitpython

## Components


## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO35, MISO=GPIO37, SCK=GPIO36
- **UART**: TX=GPIO43, RX=GPIO44
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | A0 — ADC | — | adc, digital-input, digital-output, pwm |
| GPIO2 | A1 — ADC | — | adc, digital-input, digital-output, pwm |
| GPIO3 | A2 / SDA — ADC / I2C Data | — | adc, digital-input, digital-output, pwm |
| GPIO4 | A3 / SCL — ADC / I2C Clock | — | adc, digital-input, digital-output, pwm |
| GPIO5 | A4 — ADC | — | adc, digital-input, digital-output, pwm |
| GPIO6 | A5 — ADC | — | adc, digital-input, digital-output, pwm |
| GPIO8 | D5 — Digital GPIO | — | digital-input, digital-output, pwm |
| GPIO9 | D6 — Digital GPIO | — | digital-input, digital-output, pwm |
| GPIO10 | D9 — Digital GPIO | — | digital-input, digital-output, pwm |
| GPIO11 | D10 — Digital GPIO / CS | — | digital-input, digital-output, pwm |
| GPIO12 | D11 — Digital GPIO | — | digital-input, digital-output, pwm |
| GPIO35 | MOSI — SPI Data Out | — | digital-input, digital-output, pwm |
| GPIO37 | MISO — SPI Data In | — | digital-input, digital-output, pwm |
| GPIO36 | SCK — SPI Clock | — | digital-input, digital-output, pwm |
| GPIO43 | TX — UART0 Transmit | — | digital-input, digital-output, pwm |
| GPIO44 | RX — UART0 Receive | — | digital-input, digital-output, pwm |

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5477&ref=openhardware.directory&product=adafruit-feather-esp32-s3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-esp32-s3-feather&ref=openhardware.directory&product=adafruit-feather-esp32-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-ESP32-S3-Feather-PCB&ref=openhardware.directory&product=adafruit-feather-esp32-s3&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-esp32-s3)

---

# M5Stack StamPLC

> ESP32-S3 industrial PLC controller with 1.14" IPS LCD, 4 relays, 8 opto-isolated inputs, RS-485, CAN bus, INA226 power monitor, RTC, buzzer, microSD, and DIN-rail mounting in a compact enclosure.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** plc
- **Price:** ~$42.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector instructions
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **USB:** USB-C
- **Power:** DC 6-36V via DC5521 barrel jack
- **Dimensions:** 80 x 72 x 33.4mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- esphome
- micropython
- uiflow

## Components

- **ESP32-S3FN8** (mcu): Espressif ESP32-S3 with 8MB flash, dual-core Xtensa LX7 at 240MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-stamplc&source=md-export)
- **ST7789V2** (display-driver): 135x240 IPS LCD driver — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fdatasheet%2Funit%2Flcd%2FST7789V2_SPEC_V1.0.pdf&ref=openhardware.directory&product=m5stack-stamplc&source=md-export)
- **INA226** (current-sensor): High-precision I2C current and voltage monitor — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fina226.pdf&ref=openhardware.directory&product=m5stack-stamplc&source=md-export)
- **LM75B** (sensor): I2C temperature sensor with 0.125C resolution — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FLM75B.pdf&ref=openhardware.directory&product=m5stack-stamplc&source=md-export)
- **RX8130CE** (rtc): RTC with built-in crystal oscillator — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2Fdatasheet%2F2%2F137%2FRX8130CE-3361531.pdf&ref=openhardware.directory&product=m5stack-stamplc&source=md-export)

## Protocols

- **I2C**: SDA=GPIO13, SCL=GPIO15
- **SPI**: SCK=GPIO7, MOSI=GPIO8, MISO=GPIO9
- **RS-485**: TX=GPIO0, RX=GPIO39, DIR=GPIO46
- **CAN**: TX=GPIO42, RX=GPIO43

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO13 | I2C SDA | — | digital-input, digital-output, adc, touch, pwm |
| GPIO15 | I2C SCL | — | digital-input, digital-output, adc, touch, pwm |
| GPIO2 | Grove Port A SDA | — | digital-input, digital-output, adc, touch, pwm |
| GPIO1 | Grove Port A SCL | — | digital-input, digital-output, adc, touch, pwm |
| GPIO5 | Grove Port B SDA | — | digital-input, digital-output, adc, touch, pwm |
| GPIO4 | Grove Port B SCL | — | digital-input, digital-output, adc, touch, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stamp-plc-controller-with-m5stamps3&ref=openhardware.directory&product=m5stack-stamplc&source=md-export) — $42.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stamp-plc-controller-with-m5stamps3&ref=openhardware.directory&product=m5stack-stamplc&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5StamPLC&ref=openhardware.directory&product=m5stack-stamplc&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FStamPLC&ref=openhardware.directory&product=m5stack-stamplc&source=md-export)

## Tags

`esp32-s3`, `m5stack`, `plc`, `industrial`, `relay`, `rs485`, `can-bus`, `din-rail`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-stamplc)

---

# LILYGO T-Relay

> ESP32 development board with 4 onboard HRS4H-S-DC5V relays, 4MB flash, 8MB PSRAM, WiFi, BLE 4.2, and optocoupler-isolated GPIO expansion — designed for wireless remote switch control of AC/DC loads.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$10.01
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro USB (via T-U2T programmer)
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- esphome
- arduino
- esp-idf

## Components

- **ESP32** (mcu): Dual-core 240MHz Xtensa LX6 with WiFi and BLE 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-relay&source=md-export)
- **HRS4H-S-DC5V** (relay): 4 groups of DC 5V HRS4H relays with blue LED indicators, controlled via dedicated GPIO pins with optocoupler isolation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.te.com%2Fusa-en%2Fproduct-HRS4H-S-DC5V.html&ref=openhardware.directory&product=lilygo-t-relay&source=md-export)
- **CH9102** (usb-serial): USB to serial converter for programming and debug output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH9102.html&ref=openhardware.directory&product=lilygo-t-relay&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **CAN**
- **I2S**
- **SDIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-relay&ref=openhardware.directory&product=lilygo-t-relay&source=md-export) — $10.01

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-relay&ref=openhardware.directory&product=lilygo-t-relay&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T-Relay&ref=openhardware.directory&product=lilygo-t-relay&source=md-export)

## Tags

`esp32`, `relay`, `home-automation`, `remote-switch`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-relay)

---

# 0.96" OLED SSD1306 Display (128x64)

> Popular 0.96-inch monochrome OLED display with 128x64 pixel resolution and SSD1306 driver IC. I2C interface with wide library support, the go-to display for Arduino and ESP32 projects.

## Quick Facts

- **Brand:** OpenELAB
- **Board Type:** display-module
- **Price:** ~$7.29
- **CPU:** None (passive display module)
- **RAM:** None
- **Flash:** none
- **Power:** 3.3V-5V via header pins

## Components

- **SSD1306** (display-driver): 128x64/128x32 monochrome OLED driver with I2C and SPI interface, built-in charge pump, and 1KB GDDRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=oled-096-inch-ssd1306-display&source=md-export)

## Protocols

- **I2C**

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2F096incholedssd1306display&ref=openhardware.directory&product=oled-096-inch-ssd1306-display&source=md-export) — $7.29

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2F096incholedssd1306display&ref=openhardware.directory&product=oled-096-inch-ssd1306-display&source=md-export)

## Tags

`oled`, `display`, `i2c`, `ssd1306`, `128x64`, `monochrome`

---
[View full device page](https://openhardware.directory/s/1370/oled-096-inch-ssd1306-display)

---

# 1.77" SPI TFT Display (128x160)

> Color 1.77-inch TFT LCD display module with 128x160 pixel resolution and ST7735 driver. SPI interface for fast refresh rates, capable of displaying full-color graphics, images, and UI elements.

## Quick Facts

- **Brand:** OpenELAB
- **Board Type:** display-module
- **Price:** ~$8.49
- **CPU:** None (passive display module)
- **RAM:** None
- **Flash:** none
- **Power:** 3.3V-5V via header pins

## Components

- **ST7735** (display-driver): 262K-color TFT LCD single-chip controller/driver with 132x162 resolution, SPI interface, and built-in voltage generator — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7735.pdf&ref=openhardware.directory&product=tft-177-inch-spi-display&source=md-export)

## Protocols

- **SPI**

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2F177inchspitftdisplay&ref=openhardware.directory&product=tft-177-inch-spi-display&source=md-export) — $8.49

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2F177inchspitftdisplay&ref=openhardware.directory&product=tft-177-inch-spi-display&source=md-export)

## Tags

`tft`, `display`, `spi`, `st7735`, `128x160`, `color`, `lcd`

---
[View full device page](https://openhardware.directory/s/1370/tft-177-inch-spi-display)

---

# M5Stack Single Live Wire WiFi Smart Switch

> ESP32-C6 based WiFi smart switch for single live wire AC power control. Supports WiFi 6 and Zigbee 3.0, fits standard wall boxes for home automation.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$29.9
- **CPU:** ESP32-C6
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **Power:** AC 100-250V

## Connectivity

WiFi WiFi 6 | Zigbee Zigbee 3.0

## Compatible Firmware

- esphome
- tasmota
- arduino

## Components

- **ESP32-C6** (MCU): Espressif single-core RISC-V MCU with WiFi 6, Bluetooth 5, and IEEE 802.15.4 (Zigbee/Thread) support — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-wifi-smart-switch&source=md-export)
- **AC Power Relay** (Relay): Single-channel relay for switching AC mains power loads up to 10A — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fsinglelive-wire-wifi-switch&ref=openhardware.directory&product=m5stack-wifi-smart-switch&source=md-export)

## Protocols

- **WiFi**
- **Zigbee**

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stack-singlelive-wire-wifi-switch&ref=openhardware.directory&product=m5stack-wifi-smart-switch&source=md-export) — $29.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fsingle-live-wire-wi-fi-smart-switch-esp32-c6&ref=openhardware.directory&product=m5stack-wifi-smart-switch&source=md-export)

## Tags

`smart-switch`, `wifi`, `esp32-c6`, `home-automation`, `ac-power`, `m5stack`, `zigbee`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-wifi-smart-switch)

---

# Bee Data Logger

> ESP32-S3 based data logging board with DS3231 RTC, microSD card slot, dual STEMMA/Qwiic connectors, and LiPo charging. Achieves ~21µA deep sleep current. Open source hardware with Arduino and CircuitPython support.

## Quick Facts

- **Brand:** Smart Bee Designs
- **Board Type:** Development Board
- **Price:** ~$34.99
- **CPU:** ESP32-S3
- **Flash:** 8MB
- **Power:** USB-C 5V / 1S LiPo battery

## Connectivity

WiFi Wi-Fi 4 | Bluetooth BLE 5.0

## Components

- **ESP32-S3**: Espressif ESP32-S3 system-on-chip with WiFi and Bluetooth LE 5.0, dual-core Xtensa LX7 processor at 240MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=bee-data-logger&source=md-export)
- **DS3231**: Maxim DS3231 temperature-compensated real-time clock with ±2ppm accuracy and CR1220 backup battery — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.maximintegrated.com%2Fen%2Fds%2FDS3231.pdf&ref=openhardware.directory&product=bee-data-logger&source=md-export)

## Protocols

- **undefined**
- **undefined**
- **undefined**
- **undefined**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fsmartbee%2Fesp32-data-logger-wrtc-sd%2F&ref=openhardware.directory&product=bee-data-logger&source=md-export) — $34.99

## Available Software


## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fstrid3r21%2FBee-Data-Logger&ref=openhardware.directory&product=bee-data-logger&source=md-export)
- [store](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fsmartbee%2Fesp32-data-logger-wrtc-sd%2F&ref=openhardware.directory&product=bee-data-logger&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fsmartbee%2Fesp32-data-logger-wrtc-sd%2F&ref=openhardware.directory&product=bee-data-logger&source=md-export)

## Tags

`esp32-s3`, `data-logger`, `rtc`, `ds3231`, `microsd`, `low-power`, `stemma-qt`, `qwiic`, `lipo`, `open-source`, `breadboard-friendly`, `circuitpython`, `arduino`

---
[View full device page](https://openhardware.directory/s/1370/bee-data-logger)

---

# Olimex ESP32-POE

> Open-source ESP32 development board with built-in Ethernet, Power-over-Ethernet support, micro-SD card slot, and LiPo battery connector. Ideal for wired Tasmota nodes and industrial IoT applications.

## Quick Facts

- **Brand:** Olimex
- **Board Type:** dev-board
- **Price:** ~$24.95
- **CPU:** ESP32-WROOM-32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **GPIO:** 20+ pins
- **USB:** USB-C
- **Power:** PoE 802.3af or USB-C 5V or LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2 | Ethernet 100Mbps (LAN8710A)

## Compatible Firmware

- Tasmota
- esphome
- arduino
- micropython

## Components

- **ESP32-WROOM-32** (Microcontroller): Espressif ESP32-WROOM-32 module with dual-core Xtensa LX6 at 240MHz, 4MB flash, WiFi 802.11 b/g/n, and Bluetooth 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=olimex-esp32-poe&source=md-export)
- **LAN8710A** (Ethernet PHY): Microchip LAN8710A 10/100 Ethernet PHY with RMII interface for wired network connectivity — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F00002164B.pdf&ref=openhardware.directory&product=olimex-esp32-poe&source=md-export)

## Protocols

- **WiFi 802.11 b/g/n**
- **Bluetooth 4.2 + BLE**
- **Ethernet 100Mbps**
- **I2C**
- **SPI**
- **UART**
- **MQTT**

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** Yes

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.olimex.com%2FProducts%2FIoT%2FESP32%2FESP32-POE%2Fopen-source-hardware&ref=openhardware.directory&product=olimex-esp32-poe&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Ftemplates.blakadder.com%2Folimex_ESP32-POE.html&ref=openhardware.directory&product=olimex-esp32-poe&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FOLIMEX%2FESP32-POE&ref=openhardware.directory&product=olimex-esp32-poe&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FOLIMEX%2FESP32-POE%2Ftree%2Fmaster%2FHARDWARE&ref=openhardware.directory&product=olimex-esp32-poe&source=md-export)

## Tags

`esp32`, `ethernet`, `poe`, `wifi`, `tasmota`, `esphome`, `open-source-hardware`, `development-board`, `industrial-iot`, `olimex`, `sd-card`

---
[View full device page](https://openhardware.directory/s/1370/olimex-esp32-poe)

---

# Adafruit PyGamer

> Handheld gaming console and dev board powered by ATSAMD51J19 (120MHz Cortex-M4F) with a 1.8" TFT display, 5 NeoPixels, accelerometer, and Feather-compatible headers. Runs MakeCode Arcade, CircuitPython, or Arduino.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** handheld-gaming
- **Price:** ~$44.95
- **CPU:** ARM Cortex-M4F @ 120MHz (ATSAMD51J19)
- **RAM:** 192KB
- **Flash:** 512KB + 8MB QSPI
- **Power:** 5V via Micro-USB or LiPoly battery
- **Dimensions:** 101.6 x 60.0 x 19.5mm

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- circuitpython
- makecode
- arduino

## Components

- **ATSAMD51J19** (mcu): ARM Cortex-M4F @ 120MHz, 512KB Flash, 192KB RAM, 3.3V logic. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D5xE5x_Family_Data_Sheet_DS60001507F.pdf&ref=openhardware.directory&product=adafruit-pygamer&source=md-export)
- **LIS3DH** (mcu): Triple-axis MEMS accelerometer with tap and free-fall detection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flis3dh.pdf&ref=openhardware.directory&product=adafruit-pygamer&source=md-export)

## Protocols

- **I2C**: SDA=D26, SCL=D27
- **SPI**: MOSI=D11, MISO=D12, SCK=D13
- **UART**: TX=D1, RX=D0
- **PWM**
- **ADC**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| A0 | A0 — ADC/DAC | — | analog-input, dac, digital-input, digital-output, pwm |
| A1 | A1 — ADC | — | analog-input, digital-input, digital-output, pwm |
| A2 | A2 — ADC | — | analog-input, digital-input, digital-output, pwm |
| A3 | A3 — ADC | — | analog-input, digital-input, digital-output, pwm |
| A4 | A4 — ADC | — | analog-input, digital-input, digital-output, pwm |
| A5 | A5 — ADC | — | analog-input, digital-input, digital-output, pwm |
| D5 | D5 — Digital | — | digital-input, digital-output, pwm |
| D6 | D6 — Digital | — | digital-input, digital-output, pwm |
| D9 | D9 — Digital/PWM | — | digital-input, digital-output, pwm |
| D10 | D10 — Digital/PWM | — | digital-input, digital-output, pwm |
| D11 | D11 — MOSI/PWM | — | digital-input, digital-output, pwm, spi-mosi |
| D12 | D12 — MISO | — | digital-input, digital-output, spi-miso |
| D13 | D13 — SCK/LED | — | digital-input, digital-output, spi-sck |
| SDA | SDA — I2C Data (D26) | — | digital-input, digital-output, i2c-sda |
| SCL | SCL — I2C Clock (D27) | — | digital-input, digital-output, i2c-scl |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4242&ref=openhardware.directory&product=adafruit-pygamer&source=md-export) — 44.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4242&ref=openhardware.directory&product=adafruit-pygamer&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4242&ref=openhardware.directory&product=adafruit-pygamer&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-pygamer&ref=openhardware.directory&product=adafruit-pygamer&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_Arcada&ref=openhardware.directory&product=adafruit-pygamer&source=md-export)
- [circuitpython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fpygamer%2F&ref=openhardware.directory&product=adafruit-pygamer&source=md-export)

## Tags

`gaming`, `handheld`, `atsamd51`, `circuitpython`, `makecode`, `feather`, `neopixel`, `stemma`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-pygamer)

---

# BBC micro:bit v2

> Upgraded BBC micro:bit with Nordic nRF52833 Cortex-M4F, Bluetooth 5.1, 5×5 LED matrix, 2 buttons, capacitive touch logo, built-in speaker and MEMS microphone, edge connector, and low-power mode. Same form factor as v1.

## Quick Facts

- **Brand:** BBC micro:bit
- **Board Type:** educational-board
- **Price:** ~$17.95
- **CPU:** ARM Cortex-M4F @ 64MHz (Nordic nRF52833)
- **RAM:** 128KB
- **Flash:** 512KB
- **Power:** 5V via Micro-USB or 3xAAA battery

## Connectivity

WiFi false | Bluetooth Bluetooth 5.1 BLE (nRF52833) | Zigbee false | Ethernet false

## Compatible Firmware

- micropython
- makecode-microbit
- arduino

## Components

- **nRF52833** (mcu): Nordic Semiconductor nRF52833 ARM Cortex-M4F @ 64MHz, 512KB Flash, 128KB RAM, Bluetooth 5.1 BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52833_PS_v1.3.pdf&ref=openhardware.directory&product=bbc-micro-bit-v2&source=md-export)

## Protocols

- **I2C**: SDA=P20, SCL=P19
- **SPI**: MOSI=P15, MISO=P14, SCK=P13
- **UART**: TX=P0, RX=P1
- **BLE**
- **PWM**
- **ADC**: ADC0=P0, ADC1=P1, ADC2=P2

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| P0 | GPIO / UART TX / ADC / Touch | — | digital-input, digital-output, analog-input, touch |
| P1 | GPIO / ADC / Touch | — | digital-input, digital-output, analog-input, touch |
| P2 | GPIO / ADC / Touch | — | digital-input, digital-output, analog-input, touch |
| P3 | LED column 1 / ADC | — | digital-input, digital-output, analog-input |
| P4 | LED column 2 / ADC | — | digital-input, digital-output, analog-input |
| P5 | Button A | — | digital-input |
| P6 | LED column 9 | — | digital-input, digital-output |
| P7 | LED column 8 | — | digital-input, digital-output |
| P8 | GPIO | — | digital-input, digital-output |
| P9 | LED column 7 | — | digital-input, digital-output |
| P10 | LED column 3 / ADC | — | digital-input, digital-output, analog-input |
| P11 | Button B | — | digital-input |
| P12 | GPIO (reserved) | — | digital-input, digital-output |
| P13 | SPI SCK | — | digital-input, digital-output |
| P14 | SPI MISO | — | digital-input, digital-output |
| P15 | SPI MOSI | — | digital-input, digital-output |
| P16 | SPI CS / GPIO | — | digital-input, digital-output |
| P19 | I2C SCL | — | digital-input, digital-output |
| P20 | I2C SDA | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4781&ref=openhardware.directory&product=bbc-micro-bit-v2&source=md-export) — 17.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4781&ref=openhardware.directory&product=bbc-micro-bit-v2&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4781&ref=openhardware.directory&product=bbc-micro-bit-v2&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Ftech.microbit.org%2F&ref=openhardware.directory&product=bbc-micro-bit-v2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fmicrobit-foundation%2Fmicrobit-v2&ref=openhardware.directory&product=bbc-micro-bit-v2&source=md-export)

## Tags

`microbit`, `nrf52833`, `bluetooth`, `ble`, `educational`, `makecode`, `micropython`, `bbc`, `speaker`, `microphone`

## Certifications

RoHS, FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/bbc-micro-bit-v2)

---

# Adafruit ItsyBitsy ESP32

> Ultra-compact ESP32 development board in the ItsyBitsy form factor with WiFi, Bluetooth Classic + BLE, USB-C, and LiPo charging — perfect for space-constrained wireless projects.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$14.95
- **CPU:** Xtensa LX6 dual-core @ 240MHz (ESP32)
- **RAM:** 520KB SRAM
- **Flash:** 8MB
- **USB:** USB-C 2.0 (via CP2102N bridge)
- **Power:** 5V via USB-C or 3.3V pin
- **Dimensions:** 36 × 17.8mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth Classic + BLE 4.2

## Compatible Firmware

- esp-idf
- arduino
- micropython
- circuitpython

## Components


## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO35, MISO=GPIO37, SCK=GPIO36
- **UART**: TX=GPIO43, RX=GPIO44
- **PWM**
- **ADC**: A0=GPIO1, A1=GPIO2, A2=GPIO3, A3=GPIO4, A4=GPIO5, A5=GPIO6

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | A0 — ADC1_CH0 | — | adc, digital-input, digital-output, pwm |
| GPIO2 | A1 — ADC1_CH1 | — | adc, digital-input, digital-output, pwm |
| GPIO3 | A2 / SDA — ADC1_CH2 / I2C Data | — | adc, digital-input, digital-output, pwm |
| GPIO4 | A3 / SCL — ADC1_CH3 / I2C Clock | — | adc, digital-input, digital-output, pwm |
| GPIO5 | A4 — ADC1_CH4 | — | adc, digital-input, digital-output, pwm |
| GPIO6 | A5 — ADC1_CH5 | — | adc, digital-input, digital-output, pwm |
| GPIO7 | D5 — Digital GPIO | — | digital-input, digital-output, pwm |
| GPIO8 | D6 — Digital GPIO | — | digital-input, digital-output, pwm |
| GPIO9 | D9 — Digital GPIO | — | digital-input, digital-output, pwm |
| GPIO10 | D10 — Digital GPIO / CS | — | digital-input, digital-output, pwm |
| GPIO11 | D11 — Digital GPIO | — | digital-input, digital-output, pwm |
| GPIO35 | MOSI — SPI Data Out | — | digital-input, digital-output, pwm |
| GPIO37 | MISO — SPI Data In | — | digital-input, digital-output, pwm |
| GPIO36 | SCK — SPI Clock | — | digital-input, digital-output, pwm |
| GPIO43 | TX — UART0 Transmit | — | digital-input, digital-output, pwm |
| GPIO44 | RX — UART0 Receive | — | digital-input, digital-output, pwm |

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5727&ref=openhardware.directory&product=adafruit-itsybitsy-esp32&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-itsybitsy-esp32&ref=openhardware.directory&product=adafruit-itsybitsy-esp32&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-ItsyBitsy-ESP32-PCB&ref=openhardware.directory&product=adafruit-itsybitsy-esp32&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/adafruit-itsybitsy-esp32)

---

# Pine64 Oz64

> RISC-V and ARM dual-ISA single board computer powered by the Sophgo SG2000 SoC with 512MB DDR3, WiFi 6, BLE 5.2, 10/100 Ethernet, dual MIPI-CSI camera ports, and 0.5 TOPS NPU. Hardware switch selects between RISC-V and ARM boot. Priced from $12.99.

## Quick Facts

- **Brand:** Pine64
- **Board Type:** sbc
- **Price:** ~$12.99
- **CPU:** Sophgo SG2000
- **RAM:** 512 MB DDR3
- **Flash:** none (microSD,eMMC boot)
- **GPIO:** 26 pins
- **USB:** USB 2.0 Type-A host
- **Power:** 5V/2A via DC barrel jack
- **Dimensions:** 85 mm × 56 mm

## Connectivity

WiFi Wi-Fi 6 | Bluetooth BLE 5.2 | Ethernet 10/100 Mbps

## Compatible Firmware

- linux
- nuttx
- freertos

## Components

- **SG2000** (MCU): Quad-core RISC-V+ARM SoC with 512MB DDR3 SiP, 0.5 TOPS NPU, dual MIPI-CSI — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsophgo%2Fsophgo-doc%2Freleases%2Fdownload%2Fsg2000-trm-v1.0%2Fsg2000_trm_en.pdf&ref=openhardware.directory&product=pine64-oz64&source=md-export)
- **AIC8800DC** (wifi-module): 2.4GHz WiFi 6 + BLE 5.2 wireless module — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Fdatasheet%2Foz64%2FAIC8800DC%2520Datasheet%2520v1.0.pdf&ref=openhardware.directory&product=pine64-oz64&source=md-export)
- **ATECC608A** (secure-element): Hardware crypto and key storage secure element — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Foz64%2FPINE64_Oz64_Schematic-20240517.pdf&ref=openhardware.directory&product=pine64-oz64&source=md-export)
- **Built-in Microphone** (microphone): Onboard MEMS microphone — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Foz64%2FPINE64_Oz64_Schematic-20240517.pdf&ref=openhardware.directory&product=pine64-oz64&source=md-export)

## Protocols

- **UART**: TX=Header, RX=Header
- **I2C**: SDA=Header, SCL=Header
- **SPI**: MOSI=Header, MISO=Header, SCLK=Header, CS=Header

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | 26-pin header | — | digital-input, digital-output, uart, i2c, spi, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** Apache-2.0

## Where to Buy

- [Pine64 Store](https://openhardware.directory/r?to=https%3A%2F%2Fpine64.com%2Fproduct%2Foz64-sbc%2F&ref=openhardware.directory&product=pine64-oz64&source=md-export) — $12.99
- [ameriDroid](https://openhardware.directory/r?to=https%3A%2F%2Fameridroid.com%2Fproducts%2Foz64&ref=openhardware.directory&product=pine64-oz64&source=md-export) — $19.95

## Available Software

- [Debian SG200x](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FFishwaldo%2Fsophgo-sg200x-debian&ref=openhardware.directory&product=pine64-oz64&source=md-export) (OS)
- [Apache NuttX (SG2000)](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Flupyuen%2Fnuttx-sg2000&ref=openhardware.directory&product=pine64-oz64&source=md-export) (RTOS)
- [Sophgo NPU SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsophgo%2Ftdl_models&ref=openhardware.directory&product=pine64-oz64&source=md-export) (SDK)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fpine64.com%2Fproduct%2Foz64-sbc%2F&ref=openhardware.directory&product=pine64-oz64&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FFishwaldo%2Fsophgo-sg200x-debian&ref=openhardware.directory&product=pine64-oz64&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.pine64.org%2Fwiki%2FOz64&ref=openhardware.directory&product=pine64-oz64&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsophgo%2Fsophgo-doc%2Freleases%2Fdownload%2Fsg2000-trm-v1.0%2Fsg2000_trm_en.pdf&ref=openhardware.directory&product=pine64-oz64&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Foz64%2FPINE64_Oz64_Schematic-20240517.pdf&ref=openhardware.directory&product=pine64-oz64&source=md-export)

## Tags

`risc-v`, `arm`, `wifi-6`, `ble`, `linux`, `sg2000`, `pine64`, `sbc`, `npu`

---
[View full device page](https://openhardware.directory/s/1370/pine64-oz64)

---

# LILYGO T-Internet-POE

> ESP32 board with LAN8720 10/100 Mbps Ethernet, Power-over-Ethernet (PoE 36–57V), WiFi, and BLE 4.2 — ideal for wired IoT gateways, industrial automation, and network-connected data loggers.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$16.01
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C 2.0
- **Power:** 5V + PoE

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2 | Ethernet 10/100 Mbps (LAN8720)

## Compatible Firmware

- arduino
- esphome
- platformio

## Components

- **ESP32-D0WDQ6** (mcu): Espressif ESP32-D0WDQ6 dual-core Xtensa LX6 at 240MHz with WiFi and Bluetooth 4.2/BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-internet-poe&source=md-export)
- **LAN8720** (ethernet-phy): Microchip LAN8720 single-chip 10/100 Mbps Ethernet PHY with RMII interface for wired network connectivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F8720a.pdf&ref=openhardware.directory&product=lilygo-t-internet-poe&source=md-export)

## Protocols

- **UART**: TX=GPIO1, RX=GPIO3
- **I2C**: SDA=GPIO21, SCL=GPIO22
- **SPI**: MOSI=GPIO13, MISO=GPIO12, CLK=GPIO14, CS=GPIO15

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot Button | — | digital-input, strapping |
| GPIO4 | Free GPIO | — | digital-input, digital-output, adc, pwm |
| GPIO12 | SD MISO | — | digital-input |
| GPIO13 | SD MOSI | — | digital-output |
| GPIO14 | SD CLK | — | digital-output |
| GPIO15 | SD CS | — | digital-output |
| GPIO21 | I2C SDA | — | digital-input, digital-output |
| GPIO22 | I2C SCL | — | digital-output |
| GPIO32 | Free GPIO | — | digital-input, digital-output, adc, rtc |
| GPIO33 | Free GPIO | — | digital-input, digital-output, adc, rtc |
| GPIO34 | Free ADC Input | — | digital-input, adc, input-only |
| GPIO35 | Free ADC Input | — | digital-input, adc, input-only |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-internet-poe&ref=openhardware.directory&product=lilygo-t-internet-poe&source=md-export) — $16.01

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-internet-poe&ref=openhardware.directory&product=lilygo-t-internet-poe&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGO-T-ETH-Series&ref=openhardware.directory&product=lilygo-t-internet-poe&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-internet-poe&source=md-export)

## Tags

`esp32`, `ethernet`, `poe`, `lan8720`, `lilygo`, `wired`, `iot-gateway`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-internet-poe)

---

# LILYGO T-Knob

> Smart rotary encoder controller based on ESP32-C6 with WiFi 6, BLE 5, Zigbee/Thread, 4 RGB LEDs, buzzer, and magnetic Hall-effect knob for wireless volume control and smart home automation.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$37.28
- **CPU:** RISC-V single-core @ 160MHz
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.0 | Zigbee Zigbee 3.0

## Compatible Firmware

- arduino
- esp-idf
- esphome

## Components

- **ESP32-C6** (mcu): Single-core RISC-V at 160MHz with WiFi 6 (802.11ax), BLE 5.0, and IEEE 802.15.4 for Zigbee/Thread. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-knob&source=md-export)
- **rotary-encoder** (rotary-encoder): Contactless magnetic rotary encoder for smooth infinite rotation without mechanical wear. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Knob&ref=openhardware.directory&product=lilygo-t-knob&source=md-export)

## Protocols

- **I2C**: SDA=GPIO6, SCL=GPIO7
- **UART**: TX=GPIO16, RX=GPIO17

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO6 | I2C SDA | — | digital-input, digital-output |
| GPIO7 | I2C SCL | — | digital-input, digital-output |
| GPIO20 | LED 1 | — | digital-output |
| GPIO14 | Buzzer | — | digital-output, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-knob&ref=openhardware.directory&product=lilygo-t-knob&source=md-export) — $37.28

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-knob&ref=openhardware.directory&product=lilygo-t-knob&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Knob&ref=openhardware.directory&product=lilygo-t-knob&source=md-export)

## Tags

`esp32-c6`, `rotary-encoder`, `knob`, `zigbee`, `thread`, `smart-home`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-knob)

---

# LILYGO T-Micro32 V2.0

> LILYGO T-Micro32 V2.0 is a 45%-smaller ESP32 PICO-D4 module with integrated IPEX antenna connector, designed for space-constrained embedded product designs.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$4.24
- **CPU:** ESP32 PICO-D4
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **Power:** 3.3V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- esphome

## Components

- **ESP32-PICO-D4** (mcu): System-in-Package integrating ESP32 dual-core LX6 at 240MHz, 4MB flash, crystal, and passives in a 7×7mm package. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-pico-d4_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-micro32-v2&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **PWM**
- **ADC**
- **DAC**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-micro32-v2-0&ref=openhardware.directory&product=lilygo-t-micro32-v2&source=md-export) — $4.24

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-micro32-v2-0&ref=openhardware.directory&product=lilygo-t-micro32-v2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLilyGO%2FTTGO-micro32-V2.0&ref=openhardware.directory&product=lilygo-t-micro32-v2&source=md-export)

## Tags

`esp32`, `pico-d4`, `wifi`, `bluetooth`, `ultra-compact`, `ipex`, `lilygo`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-micro32-v2)

---

# LILYGO ESP32-S2

> Pure ESP32-S2 development board with 4MB Flash, 8MB SRAM, native USB, WiFi 802.11 b/g/n, onboard LiPo charging, and multiple control buttons — a single-core Xtensa LX7 board for USB-HID and IoT applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S2
- **Price:** ~$8
- **CPU:** ESP32-S2
- **RAM:** 8MB SRAM
- **Flash:** 4MB
- **USB:** USB-C (native USB OTG)
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n

## Compatible Firmware

- arduino
- micropython
- platformio

## Components

- **ESP32-S2** (mcu): Single-core Xtensa LX7 at 240MHz with native USB OTG, WiFi 802.11 b/g/n, and 320KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-esp32-s2&source=md-export)
- **LiPo Charger** (battery-charger): Onboard LiPo charger with 500mA charging current via 1.25mm JST 2-pin connector. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Fszlcsc%2FTP4054_C16680.pdf&ref=openhardware.directory&product=lilygo-esp32-s2&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **I2S**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Fesp32-s2&ref=openhardware.directory&product=lilygo-esp32-s2&source=md-export) — $8.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Fesp32-s2&ref=openhardware.directory&product=lilygo-esp32-s2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FESP32_S2&ref=openhardware.directory&product=lilygo-esp32-s2&source=md-export)

## Tags

`esp32-s2`, `usb-hid`, `development-board`, `iot`, `arduino`, `micropython`, `wifi`, `native-usb`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-esp32-s2)

---

# LILYGO ESP32-S2 WOOR

> Compact ESP32-S2-WROOM module-based development board with 4MB Flash, 320KB SRAM, native USB OTG, WiFi 802.11 b/g/n, onboard LiPo charging, and BOOT/RESET buttons for USB HID and IoT prototyping.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S2
- **Price:** ~$5.99
- **CPU:** ESP32-S2-WROOM
- **RAM:** 320KB
- **Flash:** 4MB
- **USB:** USB-C (native USB OTG)
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n

## Compatible Firmware

- arduino
- micropython
- platformio

## Components

- **ESP32-S2-WROOM** (mcu): ESP32-S2-WROOM module with single-core Xtensa LX7, 4MB Flash, native USB OTG, and WiFi. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-esp32-s2-woor&source=md-export)
- **LiPo Charger** (battery-charger): Onboard LiPo charger with 500mA charging current and 3.7–4.2V battery input. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Fszlcsc%2FTP4054_C16680.pdf&ref=openhardware.directory&product=lilygo-esp32-s2-woor&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **I2S**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Fesp32-s2-woor&ref=openhardware.directory&product=lilygo-esp32-s2-woor&source=md-export) — $5.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Fesp32-s2-woor&ref=openhardware.directory&product=lilygo-esp32-s2-woor&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FESP32_S2&ref=openhardware.directory&product=lilygo-esp32-s2-woor&source=md-export)

## Tags

`esp32-s2`, `esp32-s2-wroom`, `usb-hid`, `development-board`, `iot`, `arduino`, `micropython`, `wifi`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-esp32-s2-woor)

---

# ESP32-C6-DevKitC-1-N8

> Espressif reference development board for the ESP32-C6 with 8MB flash, Wi-Fi 6, Bluetooth 5 LE, Zigbee 3.0, Thread, RGB LED, dual USB-C ports, and full GPIO breakout.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$9.95
- **CPU:** ESP32-C6
- **RAM:** 512KB SRAM
- **Flash:** 8 MB
- **Power:** 5V

## Connectivity

WiFi 802.11ax (Wi-Fi 6) | Bluetooth BLE 5.0 | Zigbee 3.0

## Compatible Firmware

- esp-idf
- arduino
- micropython

## Components

- **ESP32-C6-WROOM-1** (mcu): ESP32-C6 module with Wi-Fi 6, BT5 LE, Zigbee, Thread, 8MB flash, PCB antenna. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5670%2Fesp32-c6-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=esp32-c6-devkitc-1-n8&source=md-export)
- **WS2812B RGB LED** (led): Addressable RGB LED on GPIO8. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=esp32-c6-devkitc-1-n8&source=md-export)

## Protocols

- **I2C**: SDA=GPIO6, SCL=GPIO7
- **SPI**: MOSI=GPIO7, MISO=GPIO2, SCK=GPIO6
- **UART**: TX=GPIO16, RX=GPIO17
- **I2S**
- **PWM**
- **TWAI/CAN**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | D0 | — | digital, adc |
| GPIO1 | D1 | — | digital, adc |
| GPIO2 | MISO | — | spi-miso, digital, adc |
| GPIO3 | D3 | — | digital, adc |
| GPIO4 | D4 | — | digital, adc |
| GPIO5 | D5 | — | digital, adc |
| GPIO6 | SDA / SCK | — | i2c-sda, spi-sck, digital |
| GPIO7 | SCL / MOSI | — | i2c-scl, spi-mosi, digital |
| GPIO8 | RGB LED | — | digital |
| GPIO9 | D9 | — | digital |
| GPIO10 | D10 | — | digital |
| GPIO11 | D11 | — | digital |
| GPIO12 | D12 | — | digital |
| GPIO13 | D13 | — | digital |
| GPIO14 | D14 | — | digital |
| GPIO15 | D15 | — | digital |
| GPIO16 | TX | — | uart-tx, digital |
| GPIO17 | RX | — | uart-rx, digital |
| GPIO18 | D18 | — | digital |
| GPIO19 | D19 | — | digital |
| GPIO20 | D20 | — | digital |
| GPIO21 | D21 | — | digital |
| GPIO22 | D22 | — | digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5672&ref=openhardware.directory&product=esp32-c6-devkitc-1-n8&source=md-export) — 9.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5672&ref=openhardware.directory&product=esp32-c6-devkitc-1-n8&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5672%2F5672_esp32-c6-devkitc-1-schematics.pdf&ref=openhardware.directory&product=esp32-c6-devkitc-1-n8&source=md-export)
- [pinout](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5672%2F5672_esp32-c6-devkitc-1-pin-layout.png&ref=openhardware.directory&product=esp32-c6-devkitc-1-n8&source=md-export)

## Tags

`esp32-c6`, `espressif`, `wifi6`, `zigbee`, `thread`, `ble`, `devkit`, `matter`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/esp32-c6-devkitc-1-n8)

---

# ESP32-H2-DevKitM-1-N4S

> Espressif development board for the ESP32-H2 with Bluetooth 5 LE, Zigbee 3.0, Thread, and Matter support, 4MB flash, USB-C, RGB LED, and full GPIO breakout — no Wi-Fi.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$10
- **CPU:** ESP32-H2
- **RAM:** 320KB
- **Flash:** 4MB
- **Power:** 5V

## Connectivity

Bluetooth BLE 5.0 | Zigbee 3.0

## Compatible Firmware

- esp-idf
- arduino
- Zephyr

## Components

- **ESP32-H2** (mcu): 32-bit RISC-V at 96 MHz, 320KB SRAM, BT5 LE, Zigbee, Thread, Matter, USB FS. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5715%2Fesp32-h2_datasheet_en.pdf&ref=openhardware.directory&product=esp32-h2-devkitm-1-n4s&source=md-export)
- **WS2812B RGB LED** (led): Addressable RGB LED on GPIO8. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=esp32-h2-devkitm-1-n4s&source=md-export)

## Protocols

- **I2C**: SDA=GPIO22, SCL=GPIO23
- **SPI**: MOSI=GPIO5, MISO=GPIO4, SCK=GPIO6
- **UART**: TX=GPIO24, RX=GPIO25
- **I2S**
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | D0 | — | digital, adc |
| GPIO1 | D1 | — | digital, adc |
| GPIO2 | D2 | — | digital, adc |
| GPIO3 | D3 | — | digital, adc |
| GPIO4 | MISO | — | spi-miso, digital |
| GPIO5 | MOSI | — | spi-mosi, digital |
| GPIO6 | SCK | — | spi-sck, digital |
| GPIO7 | D7 | — | digital |
| GPIO8 | RGB LED | — | digital |
| GPIO9 | D9 | — | digital |
| GPIO10 | D10 | — | digital |
| GPIO11 | D11 | — | digital |
| GPIO12 | D12 | — | digital |
| GPIO13 | D13 | — | digital |
| GPIO14 | D14 | — | digital |
| GPIO22 | SDA | — | i2c-sda, digital |
| GPIO23 | SCL | — | i2c-scl, digital |
| GPIO24 | TX | — | uart-tx, digital |
| GPIO25 | RX | — | uart-rx, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5715&ref=openhardware.directory&product=esp32-h2-devkitm-1-n4s&source=md-export) — 10

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5715&ref=openhardware.directory&product=esp32-h2-devkitm-1-n4s&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5715%2Fesp32-h2_datasheet_en.pdf&ref=openhardware.directory&product=esp32-h2-devkitm-1-n4s&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.espressif.com%2Fprojects%2Fesp-dev-kits%2Fen%2Flatest%2Fesp32h2%2Fesp32-h2-devkitm-1%2Fuser_guide.html&ref=openhardware.directory&product=esp32-h2-devkitm-1-n4s&source=md-export)

## Tags

`esp32-h2`, `espressif`, `zigbee`, `thread`, `matter`, `ble`, `risc-v`, `devkit`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/esp32-h2-devkitm-1-n4s)

---

# Adafruit Feather M0 Basic Proto

> Feather-format ATSAMD21 ARM Cortex-M0+ board at 48 MHz, 3.3V with 256KB flash, 32KB RAM, LiPo charging, native USB, 12-bit ADC/DAC, and RTC crystal — lightweight and CircuitPython-capable.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$19.95
- **CPU:** ATSAMD21G18 ARM Cortex-M0+ @ 48 MHz
- **RAM:** 32 KB
- **Flash:** 256 KB
- **Power:** 3.7V LiPo via JST or 5V Micro USB
- **Dimensions:** 51 × 23 mm

## Compatible Firmware

- arduino
- circuitpython
- platformio

## Components

- **ATSAMD21G18** (mcu): Microchip ARM Cortex-M0+ at 48 MHz, 256KB flash, 32KB RAM, native USB, 12-bit ADC/DAC, hardware RTC — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D21_DA1_Family_DataSheet_DS40001882H.pdf&ref=openhardware.directory&product=adafruit-feather-m0-basic-proto&source=md-export)
- **MCP73831** (charger): Microchip MCP73831 100mA LiPo/LiIon charge management IC — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F20001984g.pdf&ref=openhardware.directory&product=adafruit-feather-m0-basic-proto&source=md-export)

## Protocols

- **UART**: TX=D1, RX=D0
- **SPI**: MOSI=D23, MISO=D22, SCK=D24, SS=D10
- **I2C**: SDA=D20, SCL=D21
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX | — | digital-input, digital-output |
| D1 | TX | — | digital-input, digital-output |
| D2 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D3 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D4 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D7 | GPIO / INT | — | digital-input, digital-output, interrupt |
| D9 | BATT / A7 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D10 | SS / PWM | — | digital-input, digital-output, pwm |
| D11 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D12 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D13 | LED / PWM | — | digital-input, digital-output, pwm |
| D20 | SDA (PA22) | — | digital-input, digital-output |
| D21 | SCL (PA23) | — | digital-input, digital-output |
| D22 | MISO (PA14) | — | digital-input, digital-output |
| D23 | MOSI (PA12) | — | digital-input, digital-output |
| D24 | SCK (PA13) | — | digital-input, digital-output |
| A0 | DAC / Analog 0 | — | analog-input, analog-output, digital-input, digital-output |
| A1 | Analog 1 | — | analog-input, digital-input, digital-output |
| A2 | Analog 2 | — | analog-input, digital-input, digital-output |
| A3 | Analog 3 | — | analog-input, digital-input, digital-output |
| A4 | Analog 4 | — | analog-input, digital-input, digital-output |
| A5 | Analog 5 | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2772&ref=openhardware.directory&product=adafruit-feather-m0-basic-proto&source=md-export) — 19.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2772&ref=openhardware.directory&product=adafruit-feather-m0-basic-proto&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-m0-basic-proto&ref=openhardware.directory&product=adafruit-feather-m0-basic-proto&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D21_DA1_Family_DataSheet_DS40001882H.pdf&ref=openhardware.directory&product=adafruit-feather-m0-basic-proto&source=md-export)

## Tags

`feather`, `atsamd21`, `arm`, `cortex-m0`, `circuitpython`, `adafruit`, `lipo`, `32-bit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-m0-basic-proto)

---

# Heltec HT-M00 Dual Channel LoRa Gateway

> A compact, low-cost dual-channel LoRaWAN gateway based on ESP32 and dual SX1276 transceivers, designed for indoor LoRa coverage of 1500-2000 square meters with support for SF7-SF12 spreading factors and LoRaWAN Class A/C protocols.

## Quick Facts

- **Brand:** Heltec Automation
- **Board Type:** lora-gateway
- **Price:** ~$39
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, hardware crypto (AES/SHA)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB Type-C (via CP2102)
- **Power:** 5V via USB Type-C
- **Dimensions:** 30 × 76 × 14mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 4.2, BLE

## Components

- **ESP32-D0WDQ6** (mcu): Xtensa LX6 dual-core processor at 240MHz with 520KB SRAM, WiFi 802.11 b/g/n, Bluetooth 4.2 + BLE, hardware crypto acceleration, and deep sleep support. Drives both SX1276 LoRa transceivers and the OLED display. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=heltec-ht-m00&source=md-export)
- **SX1276** (radio): Two Semtech SX1276 LoRa transceivers providing dual-channel reception with -110dBm sensitivity at 300bps and up to +18dBm TX power. Supports 137-1020MHz frequency range with LoRa modulation (SF7-SF12) and FSK modulation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1276&ref=openhardware.directory&product=heltec-ht-m00&source=md-export)
- **SSD1306** (display-driver): 128x64 monochrome OLED display driver connected via I2C, showing real-time gateway status including upstream/downstream packet counts and channel activity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.datasheethub.com%2Fssd1306-128x64-mono-0-96-inch-i2c-oled-display%2F&ref=openhardware.directory&product=heltec-ht-m00&source=md-export)
- **CP2102** (usb-uart): Silicon Labs CP2102 USB-to-UART bridge providing serial communication for firmware programming, debug output, and chip ID reading at 115200 baud. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Finterface%2Fusb-bridges%2Fclassic%2Fdevice.cp2102&ref=openhardware.directory&product=heltec-ht-m00&source=md-export)

## Protocols

- **SPI** (VSPI): SCK=GPIO18, MISO=GPIO19, MOSI=GPIO23
- **I2C**: SDA=GPIO4, SCL=GPIO15
- **UART** (UART0): TX=GPIO1, RX=GPIO3

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | UART0 TX | — | digital-output |
| GPIO3 | UART0 RX | — | digital-input |
| GPIO4 | I2C SDA (OLED) | — | digital-input, digital-output |
| GPIO15 | I2C SCL (OLED) | — | digital-input, digital-output, strapping |
| GPIO18 | SPI SCK (LoRa) | — | digital-output |
| GPIO19 | SPI MISO (LoRa) | — | digital-input |
| GPIO23 | SPI MOSI (LoRa) | — | digital-output |
| GPIO16 | OLED RST | — | digital-output |
| GPIO0 | CFG Button | — | digital-input, strapping |
| GPIO2 | STA Button | — | digital-input, strapping |

## Where to Buy

- [Heltec Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-m00%2F&ref=openhardware.directory&product=heltec-ht-m00&source=md-export) — 39.00
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-Channel-Gateway-Support-Standard%2Fdp%2FB08JCFMH41&ref=openhardware.directory&product=heltec-ht-m00&source=md-export) — 39.00
- [MakerFocus](https://openhardware.directory/r?to=https%3A%2F%2Fwww.makerfocus.com%2Fproducts%2Florawan-lora-gateway&ref=openhardware.directory&product=heltec-ht-m00&source=md-export) — 39.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-m00%2F&ref=openhardware.directory&product=heltec-ht-m00&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltecDocs&ref=openhardware.directory&product=heltec-ht-m00&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Florawan-application%2Flora-gateway%2Fht-m00%2Fquick_start&ref=openhardware.directory&product=heltec-ht-m00&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-M00%2FM00.pdf&ref=openhardware.directory&product=heltec-ht-m00&source=md-export)

## Tags

`lora`, `lorawan`, `gateway`, `esp32`, `sx1276`, `iot`, `heltec`

## Certifications

CE

---
[View full device page](https://openhardware.directory/s/1370/heltec-ht-m00)

---

# BigTreeTech Rodent V1.0

> ESP32-based CNC controller board co-developed with RatRig, featuring 4x TMC2160 drivers (up to 56V/4.7A RMS), FluidNC firmware, WiFi, RS-485, CAN, USB-C, and OLED display support for engraving machines.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** cnc-controller
- **Price:** ~$56
- **CPU:** ESP32-D0WD-V3 dual-core
- **RAM:** 520KB
- **Flash:** 4MB
- **USB:** USB Type-C (CH340 auto-flash)
- **Power:** DC 24-56V (V-Motor 10A); DC 12-36V (V-MOS); DC 24-56V (V-MCU 3A)
- **Dimensions:** ~100 × 90mm

## Connectivity

WiFi 802.11 b/g/n 2.4GHz 150Mbps

## Compatible Firmware

- FluidNC
- grblHAL

## Components

- **TMC2160 ×4** (motor-driver): Four Trinamic TMC2160 stepper drivers with SPI control, supporting up to 56V and 4.7A RMS (6.7A peak) with CoolStep and StallGuard — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.trinamic.com%2Ffileadmin%2Fassets%2FProducts%2FICs_Documents%2FTMC2160_Datasheet_V1.10.pdf&ref=openhardware.directory&product=bigtreetech-rodent-v1-0&source=md-export)
- **OLED Display Header** (display): I2C header for connecting an external OLED status display (128×64) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FRodent&ref=openhardware.directory&product=bigtreetech-rodent-v1-0&source=md-export)
- **ESP32 WiFi/BT** (wireless): Integrated 2.4GHz WiFi for FluidNC web UI, file uploads, and remote job control — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=bigtreetech-rodent-v1-0&source=md-export)

## Protocols

- **WiFi 802.11 b/g/n**
- **USB 2.0**
- **RS-485**
- **CAN**
- **I2C**
- **SPI**
- **Modbus RTU**
- **PWM**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-rodent&ref=openhardware.directory&product=bigtreetech-rodent-v1-0&source=md-export) — $56.00

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FRodent&ref=openhardware.directory&product=bigtreetech-rodent-v1-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-rodent&ref=openhardware.directory&product=bigtreetech-rodent-v1-0&source=md-export)

## Tags

`cnc`, `fluidnc`, `grbl`, `esp32`, `tmc2160`, `stepper-driver`, `bigtreetech`, `open-source`, `rs-485`, `engraving`, `ratrig`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-rodent-v1-0)

---

# LILYGO T8-C3

> LILYGO T8-C3 is a compact ESP32-C3 development board featuring Wi-Fi, BLE 5.0, 4MB flash, TF card slot, and USB Type-C, requiring the T-U2T adapter for programming.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-C3
- **Price:** ~$9.78
- **CPU:** ESP32-C3
- **RAM:** 400KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- esphome

## Components

- **ESP32-C3** (mcu): 32-bit RISC-V single-core processor at 160MHz with integrated Wi-Fi 802.11 b/g/n and Bluetooth 5.0 BLE, 400KB SRAM, 4MB flash. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t8-c3&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **PWM**
- **ADC**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft8-c3&ref=openhardware.directory&product=lilygo-t8-c3&source=md-export) — $9.78

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft8-c3&ref=openhardware.directory&product=lilygo-t8-c3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT8-C3&ref=openhardware.directory&product=lilygo-t8-c3&source=md-export)

## Tags

`esp32-c3`, `risc-v`, `wifi`, `bluetooth`, `tf-card`, `usb-c`, `lilygo`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t8-c3)

---

# LILYGO T-Echo Plus

> Enhanced T-Echo with nRF52840, SX1262 LoRa, L76K GPS, BHI260AP IMU, 2400mAh battery, 1.54-inch e-paper display, vibration motor, buzzer, and 1/4-inch mount — Meshtastic-ready with extended runtime.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$63.45
- **CPU:** nRF52840 ARM Cortex-M4F @ 64MHz
- **RAM:** 2MB
- **Flash:** 2MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

Bluetooth BLE 5.0 | Zigbee Zigbee (nRF52840)

## Compatible Firmware

- arduino
- platformio
- meshtastic
- meshcore

## Components

- **nRF52840** (mcu): Nordic Semiconductor nRF52840 ARM Cortex-M4F at 64MHz with 2MB Flash, 2MB RAM, supporting BLE 5, Thread, Zigbee, ANT, and 802.15.4. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52840_PS_v1.7.pdf&ref=openhardware.directory&product=lilygo-t-echo-plus&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver covering 433/868/915/920 MHz bands with +22 dBm output and -148 dBm sensitivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-echo-plus&source=md-export)
- **L76K** (gps): Quectel L76K multi-GNSS module supporting GPS, GLONASS, BeiDou, and QZSS constellations. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.quectel.com%2Fwp-content%2Fuploads%2F2021%2F03%2FQuectel_L76K_GNSS_Specification_V1.0.pdf&ref=openhardware.directory&product=lilygo-t-echo-plus&source=md-export)
- **BHI260AP** (imu): Bosch BHI260AP AI-powered IMU providing accelerometer, gyroscope, and motion recognition with on-chip AI coprocessor. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fproducts%2Fsmart-sensor-systems%2Fbhi260ap%2F&ref=openhardware.directory&product=lilygo-t-echo-plus&source=md-export)
- **E-Paper 1.54"** (display): 1.54-inch e-paper display with 200×200 resolution, SPI interface, 2-second refresh rate, and persistent display without power. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2F1.54inch_e-Paper_Module&ref=openhardware.directory&product=lilygo-t-echo-plus&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **PDM**
- **I2S**
- **QSPI**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-echo-plus&ref=openhardware.directory&product=lilygo-t-echo-plus&source=md-export) — $63.45

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-echo-plus&ref=openhardware.directory&product=lilygo-t-echo-plus&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Echo&ref=openhardware.directory&product=lilygo-t-echo-plus&source=md-export)

## Tags

`nrf52840`, `lora`, `gps`, `e-paper`, `meshtastic`, `lilygo`, `ble5`, `thread`, `zigbee`, `imu`, `off-grid`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-echo-plus)

---

# LILYGO T-Embed CC1101 Plus

> Enhanced ESP32-S3 handheld with CC1101 sub-GHz radio, nRF24L01 2.4GHz radio, 1.9" IPS LCD, IR transceiver, 16MB flash, 8MB SRAM. Upgraded version of T-Embed CC1101 with added 2.4GHz wireless module.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$58.66
- **CPU:** ESP32-S3
- **RAM:** 8MB
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Dual-core Xtensa LX7 at 240MHz with Wi-Fi b/g/n and BLE 5.0; 16MB flash, 8MB SRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-embed-cc1101-plus&source=md-export)
- **CC1101** (transceiver): Texas Instruments CC1101 low-power sub-GHz transceiver supporting 315/433/868/915MHz ISM bands — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fcc1101.pdf&ref=openhardware.directory&product=lilygo-t-embed-cc1101-plus&source=md-export)
- **nRF24L01** (transceiver): Nordic Semiconductor nRF24L01 2.4GHz ISM band wireless transceiver module — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nordicsemi.com%2FProducts%2FnRF24L01&ref=openhardware.directory&product=lilygo-t-embed-cc1101-plus&source=md-export)
- **ST7789V** (display-driver): 1.9-inch 170×320 IPS LCD display controller with SPI interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.crystalfontz.com%2Fcontrollers%2FSitronix%2FST7789V%2F&ref=openhardware.directory&product=lilygo-t-embed-cc1101-plus&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-embed-cc1101-plus&ref=openhardware.directory&product=lilygo-t-embed-cc1101-plus&source=md-export) — $58.66
- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Flilygo-t-embed-cc1101-plus&ref=openhardware.directory&product=lilygo-t-embed-cc1101-plus&source=md-export) — €69.95

## Available Software

- [Arduino IDE](https://openhardware.directory/r?to=https%3A%2F%2Fwww.arduino.cc%2F&ref=openhardware.directory&product=lilygo-t-embed-cc1101-plus&source=md-export)
- [ESP-IDF](https://openhardware.directory/r?to=https%3A%2F%2Fidf.espressif.com%2F&ref=openhardware.directory&product=lilygo-t-embed-cc1101-plus&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-embed-cc1101-plus&ref=openhardware.directory&product=lilygo-t-embed-cc1101-plus&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Embed-CC1101&ref=openhardware.directory&product=lilygo-t-embed-cc1101-plus&source=md-export)

## Tags

`esp32-s3`, `cc1101`, `nrf24l01`, `sub-ghz`, `ir`, `rf-hacking`, `multi-band`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-embed-cc1101-plus)

---

# M5Stack Atom Matrix

> Ultra-compact ESP32-PICO dev board (24x24mm) with 5x5 RGB LED matrix, 6-axis IMU (MPU6886), IR LED, programmable button, and Grove port. Perfect for LED displays and motion sensing.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$15.5
- **CPU:** Dual-core Xtensa LX6 @ 240MHz
- **Flash:** 4MB
- **USB:** Type-C
- **Power:** 5V
- **Dimensions:** 24 x 24 x 14 mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf
- uiflow
- micropython
- esphome

## Components

- **WS2812C** (5x5 RGB LED Matrix): 25 individually addressable WS2812C RGB LEDs arranged in a 5x5 matrix for animations, icons, and visual notifications — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.weltronics.co.za%2Fdatasheets%2FWS2812C.pdf&ref=openhardware.directory&product=m5stack-atom-matrix&source=md-export)
- **MPU6886** (6-axis IMU): MEMS 6-axis motion sensor combining a 3-axis accelerometer and 3-axis gyroscope for motion tracking and gesture detection — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fdatasheet%2Fcore%2FMPU-6886-000193%252Bv1.1_GHIC_en.pdf&ref=openhardware.directory&product=m5stack-atom-matrix&source=md-export)
- **IR LED** (Infrared Transmitter): Infrared LED for transmitting IR remote control signals to consumer electronics — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.vishay.com%2Fdocs%2F81009%2Ftsal6200.pdf&ref=openhardware.directory&product=m5stack-atom-matrix&source=md-export)
- **Grove Port** (GPIO/I2C Connector): 4-pin Grove connector providing GPIO and I2C interface for external sensors and actuators — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2FGrove_System%2F&ref=openhardware.directory&product=m5stack-atom-matrix&source=md-export)

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stackatommatrix&ref=openhardware.directory&product=m5stack-atom-matrix&source=md-export)
- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fatom-matrix-esp32-development-kit&ref=openhardware.directory&product=m5stack-atom-matrix&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fatom-matrix-esp32-development-kit&ref=openhardware.directory&product=m5stack-atom-matrix&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5Atom&ref=openhardware.directory&product=m5stack-atom-matrix&source=md-export)

## Tags

`esp32`, `led-matrix`, `imu`, `m5stack`, `atom`, `motion-sensor`, `grove`, `ws2812`, `mpu6886`, `compact`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-atom-matrix)

---

# Waveshare ESP32-S3-LR1121

> Compact castellated ESP32-S3 development board with Semtech LR1121 multi-band LoRa transceiver supporting Sub-GHz and 2.4GHz bands, WiFi, BLE 5.0, and Meshtastic compatibility in a 41x21mm form factor.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$14.99
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector instructions
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C (via adapter board)
- **Power:** 5V
- **Dimensions:** 41 x 21 x 3.2mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- meshtastic

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 Xtensa LX7 dual-core @ 240MHz with 512KB SRAM, 2MB PSRAM, WiFi 802.11 b/g/n and BLE 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-lr1121&source=md-export)
- **LR1121** (radio): Semtech LR1121 third-generation LoRa transceiver supporting Sub-GHz + 2.4GHz + S-Band with LoRa/(G)FSK/LR-FHSS, AES-128 encryption, and -127dBm sensitivity — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.hackaday.io%2Ffiles%2F1901428135035328%2FLR1121_data_sheet_V1_1.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-lr1121&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | General purpose | — | digital-input, digital-output, pwm |
| GPIO1 | ADC1_CH0 | — | digital-input, digital-output, adc, pwm |
| GPIO2 | ADC1_CH1 | — | digital-input, digital-output, adc, pwm |
| GPIO3 | ADC1_CH2 | — | digital-input, digital-output, adc, pwm |
| GPIO4 | ADC1_CH3 | — | digital-input, digital-output, adc, pwm |
| GPIO5 | ADC1_CH4 | — | digital-input, digital-output, adc, pwm |
| GPIO6 | ADC1_CH5 | — | digital-input, digital-output, adc, pwm |
| GPIO7 | ADC1_CH6 | — | digital-input, digital-output, adc, pwm |
| GPIO8 | General purpose | — | digital-input, digital-output, pwm |
| GPIO9 | General purpose | — | digital-input, digital-output, pwm |
| GPIO10 | SPI MOSI | — | digital-input, digital-output, pwm |
| GPIO11 | SPI MISO | — | digital-input, digital-output, pwm |
| GPIO12 | SPI SCK | — | digital-input, digital-output, pwm |
| GPIO13 | General purpose | — | digital-input, digital-output, pwm |
| GPIO14 | General purpose | — | digital-input, digital-output, pwm |
| GPIO15 | UART TX | — | digital-input, digital-output, pwm |
| GPIO16 | UART RX | — | digital-input, digital-output, pwm |
| GPIO17 | General purpose | — | digital-input, digital-output, pwm |
| GPIO18 | General purpose | — | digital-input, digital-output, pwm |
| GPIO19 | USB D- | — | digital-input, digital-output |
| GPIO20 | USB D+ | — | digital-input, digital-output |

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-lr1121.htm&ref=openhardware.directory&product=waveshare-esp32-s3-lr1121&source=md-export) — $14.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-lr1121.htm&ref=openhardware.directory&product=waveshare-esp32-s3-lr1121&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam&ref=openhardware.directory&product=waveshare-esp32-s3-lr1121&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.hackaday.io%2Ffiles%2F1901428135035328%2FLR1121_data_sheet_V1_1.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-lr1121&source=md-export)

## Tags

`esp32-s3`, `lora`, `lr1121`, `meshtastic`, `sub-ghz`, `2.4ghz`, `iot`, `waveshare`, `castellated`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-esp32-s3-lr1121)

---

# MKS KLIPAD50

> MKS/Makerbase 5-inch Klipper touchscreen panel based on Rockchip RK3328, with 800×480 IPS display, 1GB RAM, 8GB eMMC, WiFi, and USB-C power — purpose-built for 3D printer Klipper control interfaces.

## Quick Facts

- **Brand:** MKS/Makerbase
- **Board Type:** linux-sbc
- **Price:** ~$48
- **CPU:** ARM Cortex-A53 quad-core @ 1.3GHz
- **RAM:** 1GB DDR4
- **Flash:** 8GB eMMC
- **USB:** USB 2.0
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n

## Compatible Firmware

- armbian

## Components

- **RK3328** (soc): Rockchip RK3328 quad-core Cortex-A53 SoC @ 1.3GHz with Mali-450 GPU, 4K H.265 decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK33_Series%2F2017%2F0116%2F829.html&ref=openhardware.directory&product=mks-klipad50&source=md-export)

## Where to Buy

- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FIPS50-Capacitive-Screen-Klipper-SKIPR%2Fdp%2FB0DQ1437ZT&ref=openhardware.directory&product=mks-klipad50&source=md-export) — $48.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fmks-klipad50%2F&ref=openhardware.directory&product=mks-klipad50&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/mks-klipad50)

---

# ESP32-C6-WROOM-1-N8 Module

> Espressif ESP32-C6 WROOM module with 8MB flash and PCB antenna, supporting Wi-Fi 6 (802.11ax), Bluetooth 5 LE, Zigbee 3.0, and Thread — for soldering onto custom IoT hardware.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** module
- **Price:** ~$3.5
- **CPU:** ESP32-C6
- **RAM:** 512KB SRAM
- **Flash:** 8 MB
- **Power:** 3.3V supply rail
- **Dimensions:** 25.5 x 18.0 x 3.2 mm

## Connectivity

WiFi 802.11ax (Wi-Fi 6) | Bluetooth BLE 5.0 | Zigbee 3.0

## Compatible Firmware

- esp-idf
- arduino

## Components

- **ESP32-C6** (mcu): Espressif 32-bit RISC-V SoC with Wi-Fi 6, BT5 LE, Zigbee, Thread, 512KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5670%2Fesp32-c6-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=esp32-c6-wroom-1-n8&source=md-export)

## Protocols

- **I2C**: SDA=GPIO6, SCL=GPIO7
- **SPI**: MOSI=GPIO7, MISO=GPIO2, SCK=GPIO6
- **UART**: TX=GPIO16, RX=GPIO17
- **I2S**
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | D0 | — | digital, adc |
| GPIO1 | D1 | — | digital, adc |
| GPIO2 | MISO | — | spi-miso, digital, adc |
| GPIO3 | D3 | — | digital, adc |
| GPIO4 | D4 | — | digital, adc |
| GPIO5 | D5 | — | digital, adc |
| GPIO6 | SDA / SCK | — | i2c-sda, spi-sck, digital |
| GPIO7 | SCL / MOSI | — | i2c-scl, spi-mosi, digital |
| GPIO8 | D8 | — | digital |
| GPIO9 | D9 | — | digital |
| GPIO10 | D10 | — | digital |
| GPIO11 | D11 | — | digital |
| GPIO12 | D12 | — | digital |
| GPIO13 | D13 | — | digital |
| GPIO14 | D14 | — | digital |
| GPIO15 | D15 | — | digital |
| GPIO16 | TX | — | uart-tx, digital |
| GPIO17 | RX | — | uart-rx, digital |
| GPIO18 | D18 | — | digital |
| GPIO19 | D19 | — | digital |
| GPIO20 | D20 | — | digital |
| GPIO21 | D21 | — | digital |
| GPIO22 | D22 | — | digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5671&ref=openhardware.directory&product=esp32-c6-wroom-1-n8&source=md-export) — 3.5

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5671&ref=openhardware.directory&product=esp32-c6-wroom-1-n8&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5670%2Fesp32-c6-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=esp32-c6-wroom-1-n8&source=md-export)

## Tags

`esp32-c6`, `espressif`, `wifi6`, `zigbee`, `thread`, `ble`, `module`, `wroom`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/esp32-c6-wroom-1-n8)

---

# ESP32-C3-DevKit-RUST-2

> Espressif RISC-V dev board optimized for Rust programming, featuring ESP32-C3-MINI-1 with 4MB flash, Wi-Fi, BT5, onboard ICM-42670-P IMU, SHTC3 temperature/humidity sensor, and USB-C.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$19.95
- **CPU:** ESP32-C3
- **RAM:** 400 KB
- **Flash:** 4MB
- **Power:** 5V

## Connectivity

WiFi 802.11b/g/n | Bluetooth 5.0 + Mesh

## Compatible Firmware

- esp-idf
- arduino
- Rust (embedded)

## Components

- **ESP32-C3-MINI-1** (mcu): ESP32-C3 RISC-V module, 4MB flash, Wi-Fi + BT5 Mesh, PCB antenna. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5787%2Fesp32-c3-mini-1_datasheet_en.pdf&ref=openhardware.directory&product=esp32-c3-devkit-rust-2&source=md-export)
- **ICM-42670-P** (imu): TDK InvenSense 6-DoF accelerometer/gyroscope. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5787%2FDS-000451-ICM-42670-P-v1.0.pdf&ref=openhardware.directory&product=esp32-c3-devkit-rust-2&source=md-export)
- **SHTC3** (sensor): Sensirion SHTC3 digital temperature and humidity sensor. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsensirion.com%2Fmedia%2Fdocuments%2F643F9C8E%2F63534AA8%2FDatasheet_SHTC3.pdf&ref=openhardware.directory&product=esp32-c3-devkit-rust-2&source=md-export)

## Protocols

- **I2C**: SDA=GPIO5, SCL=GPIO6
- **SPI**: MOSI=GPIO8, MISO=GPIO2, SCK=GPIO7
- **UART**: TX=GPIO18, RX=GPIO19
- **I2S**
- **TWAI/CAN**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | D0 | — | digital, adc |
| GPIO1 | D1 | — | digital, adc |
| GPIO2 | MISO | — | spi-miso, digital, adc |
| GPIO3 | D3 | — | digital, adc |
| GPIO4 | D4 | — | digital, adc |
| GPIO5 | SDA | — | i2c-sda, digital |
| GPIO6 | SCL | — | i2c-scl, digital |
| GPIO7 | SCK | — | spi-sck, digital |
| GPIO8 | MOSI | — | spi-mosi, digital |
| GPIO9 | D9 | — | digital |
| GPIO10 | LED | — | digital |
| GPIO18 | TX | — | uart-tx, digital |
| GPIO19 | RX | — | uart-rx, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5787&ref=openhardware.directory&product=esp32-c3-devkit-rust-2&source=md-export) — 19.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5787&ref=openhardware.directory&product=esp32-c3-devkit-rust-2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fesp-rs%2Fesp-rust-board&ref=openhardware.directory&product=esp32-c3-devkit-rust-2&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5787%2Fesp32-c3-mini-1_datasheet_en.pdf&ref=openhardware.directory&product=esp32-c3-devkit-rust-2&source=md-export)

## Tags

`esp32-c3`, `espressif`, `rust`, `risc-v`, `imu`, `temperature-sensor`, `wifi`, `circuitpython`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/esp32-c3-devkit-rust-2)

---

# Pycom WiPy 3.0

> ESP32-based MicroPython IoT module with 802.11b/g/n WiFi, Bluetooth LE and Classic, 8MB flash, 4MB RAM, and ultra-low power ULP co-processor for deep-sleep GPIO monitoring at 25 µA.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** module
- **Price:** ~$32.5
- **CPU:** ESP32 dual-core Xtensa LX6 @ 240 MHz
- **RAM:** 4MB
- **Flash:** 8MB
- **Power:** 3.3V-5.5V via pin / USB via Expansion Board
- **Dimensions:** 42.3 × 20.0 × 3.0 mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- micropython

## Components

- **ESP32** (mcu): Espressif ESP32 dual-core Xtensa LX6 at 240MHz with integrated WiFi 802.11b/g/n and Bluetooth 4.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=pycom-wipy-30&source=md-export)

## Protocols

- **SPI**: MOSI=GPIO12, MISO=GPIO19, SCK=GPIO20
- **I2C**: SDA=GPIO14, SCL=GPIO13
- **UART**: TX=GPIO16, RX=GPIO15
- **I2S**
- **802.11 b/g/n**
- **BLE**
- **Bluetooth Classic**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO18 | P0 — GPIO / Analog In | — | digital-input, digital-output, analog-input |
| GPIO17 | P1 — GPIO / Analog In | — | digital-input, digital-output, analog-input |
| GPIO16 | P2 — GPIO / UART TX | — | digital-input, digital-output |
| GPIO15 | P3 — GPIO / UART RX | — | digital-input, digital-output |
| GPIO14 | P4/SDA — GPIO / I2C SDA | — | digital-input, digital-output |
| GPIO13 | P5/SCL — GPIO / I2C SCL | — | digital-input, digital-output |
| GPIO12 | P6/MOSI — GPIO / SPI MOSI | — | digital-input, digital-output |
| GPIO19 | P7/MISO — GPIO / SPI MISO | — | digital-input, digital-output |
| GPIO20 | P8/CLK — GPIO / SPI CLK | — | digital-input, digital-output |
| GPIO21 | P9 — GPIO | — | digital-input, digital-output |
| GPIO22 | P10 — GPIO | — | digital-input, digital-output |
| GPIO23 | P11 — GPIO | — | digital-input, digital-output |

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3338&ref=openhardware.directory&product=pycom-wipy-30&source=md-export) — 32.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3338&ref=openhardware.directory&product=pycom-wipy-30&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.pycom.io%2Fdatasheets%2Fdevelopment%2Fwipy3%2F&ref=openhardware.directory&product=pycom-wipy-30&source=md-export)

## Tags

`pycom`, `esp32`, `micropython`, `wifi`, `bluetooth`, `iot`, `ulp`, `python`

---
[View full device page](https://openhardware.directory/s/1370/pycom-wipy-30)

---

# Adafruit Metro M4 Express (ATSAMD51)

> Arduino-compatible development board with ATSAMD51 ARM Cortex-M4F at 120 MHz, 512KB flash, 192KB RAM, 2MB QSPI flash, dual 1 MSPS DACs, crypto engine, NeoPixel, and native USB. CircuitPython and Arduino IDE compatible.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$27.5
- **CPU:** ATSAMD51J19 ARM Cortex-M4F @ 120 MHz
- **RAM:** 192KB SRAM
- **Flash:** 512KB + 2MB QSPI Flash
- **Power:** 5V via USB-C (native) or 7-9V DC barrel jack
- **Dimensions:** 72.0 × 54.0 × 15.0 mm

## Compatible Firmware

- arduino
- circuitpython

## Components

- **ATSAMD51J19** (mcu): ARM Cortex-M4F at 120MHz, 512KB flash, 192KB SRAM, native USB, AES-256, TRNG, dual ADC/DAC. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.microchip.com%2Fwwwproducts%2Fen%2FATSAMD51J19A&ref=openhardware.directory&product=adafruit-metro-m4&source=md-export)

## Protocols

- **SPI**: MOSI=D23, MISO=D22, SCK=D24
- **I2C**: SDA=D20, SCL=D21
- **UART**: TX=D1, RX=D0
- **USB**
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | — | — | GPIO, UART RX |
| D1 | — | — | GPIO, UART TX |
| D2 | — | — | GPIO |
| D3 | — | — | GPIO, PWM |
| D4 | — | — | GPIO, PWM |
| D5 | — | — | GPIO, PWM |
| D6 | — | — | GPIO, PWM |
| D7 | — | — | GPIO |
| D8 | — | — | GPIO |
| D9 | — | — | GPIO, PWM |
| D10 | — | — | GPIO, PWM |
| D11 | — | — | GPIO, SPI MOSI, PWM |
| D12 | — | — | GPIO, SPI MISO |
| D13 | — | — | GPIO, SPI SCK, LED |
| SDA | — | — | I2C SDA |
| SCL | — | — | I2C SCL |
| A0 | — | — | Analog In, DAC |
| A1 | — | — | Analog In, DAC |
| A2 | — | — | Analog In |
| A3 | — | — | Analog In |
| A4 | — | — | Analog In |
| A5 | — | — | Analog In |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3382&ref=openhardware.directory&product=adafruit-metro-m4&source=md-export) — 27.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3382&ref=openhardware.directory&product=adafruit-metro-m4&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Metro-M4-Express-PCB&ref=openhardware.directory&product=adafruit-metro-m4&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-metro-m4-express-featuring-atsamd51%2Foverview&ref=openhardware.directory&product=adafruit-metro-m4&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.microchip.com%2Fwwwproducts%2Fen%2FATSAMD51J19A&ref=openhardware.directory&product=adafruit-metro-m4&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fassets%2Fassets%2F000%2F053%2F093%2Fmedium800%2Fadafruit_products_schem.png&ref=openhardware.directory&product=adafruit-metro-m4&source=md-export)

## Tags

`metro`, `atsamd51`, `arm-cortex-m4`, `circuitpython`, `arduino-compatible`, `crypto`, `audio`, `neopixel`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-metro-m4)

---

# Heltec ESP32-C3 Arduino Development Board

> Ultra-compact RISC-V development board with ESP32-C3FN4, WiFi, BLE 5.0, integrated battery management, and USB-C — ideal for low-power IoT sensor nodes and wireless prototyping.

## Quick Facts

- **Brand:** Heltec Automation
- **Board Type:** dev-board
- **Price:** ~$4.9
- **CPU:** RISC-V 32-bit single-core @ 160MHz, hardware crypto (AES/SHA/RSA/ECC)
- **RAM:** 400KB SRAM
- **Flash:** 4MB (SiP)
- **USB:** USB-C (via CH340K)
- **Power:** 5V via USB-C,3.7V LiPo battery
- **Dimensions:** 40.64 × 20.32 × 7.6mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esphome
- tasmota
- micropython

## Components

- **ESP32-C3FN4** (mcu): Espressif RISC-V 32-bit single-core MCU at 160MHz with integrated 4MB flash, 802.11 b/g/n WiFi, BLE 5.0, and hardware crypto acceleration (AES/SHA/RSA/ECC). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-esp32-c3&source=md-export)
- **TP4054** (battery-charger): Standalone constant-current/constant-voltage linear charger for single-cell lithium-ion batteries with programmable charge current up to 800mA and automatic termination. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fmedia.digikey.com%2Fpdf%2FData%2520Sheets%2FUTD%2520Semi%2520PDFs%2FTP4054.pdf&ref=openhardware.directory&product=heltec-esp32-c3&source=md-export)
- **CH340K** (usb-serial): USB to UART serial converter with integrated clock generator requiring no external crystal oscillator. Supports 5V, 3.3V, 2.5V, and 1.8V I/O with built-in diode protection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH340.html&ref=openhardware.directory&product=heltec-esp32-c3&source=md-export)

## Protocols

- **UART0** (UART0): TX=GPIO21, RX=GPIO20
- **UART1** (UART1): TX=GPIO7, RX=GPIO6
- **I2C**: SDA=GPIO1, SCL=GPIO0
- **SPI** (SPI2): SCK=GPIO4, MOSI=GPIO5, MISO=GPIO6, CS=GPIO7
- **PWM**
- **USB-JTAG**: D+=GPIO19, D-=GPIO18

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | I2C SCL / ADC1_CH0 | — | digital-input, digital-output, adc, pwm, rtc |
| GPIO1 | I2C SDA / ADC1_CH1 | — | digital-input, digital-output, adc, pwm, rtc |
| GPIO2 | ADC1_CH2 (Strapping) | — | digital-input, digital-output, adc, pwm, strapping, rtc |
| GPIO3 | ADC1_CH3 | — | digital-input, digital-output, adc, pwm, rtc |
| GPIO4 | SPI SCK / ADC1_CH4 | — | digital-input, digital-output, adc, pwm, rtc |
| GPIO5 | SPI MOSI / ADC2_CH0 | — | digital-input, digital-output, adc, pwm, rtc |
| GPIO6 | UART1 RX / SPI MISO | — | digital-input, digital-output, pwm |
| GPIO7 | UART1 TX / SPI CS | — | digital-input, digital-output, pwm |
| GPIO8 | General GPIO (Strapping) | — | digital-input, digital-output, pwm, strapping |
| GPIO9 | Boot Button (Strapping) | — | digital-input, digital-output, pwm, strapping |
| GPIO10 | General GPIO | — | digital-input, digital-output, pwm |
| GPIO18 | USB-JTAG D- | — | digital-input, digital-output |
| GPIO19 | USB-JTAG D+ | — | digital-input, digital-output |
| GPIO20 | UART0 RX | — | digital-input, digital-output, pwm |
| GPIO21 | UART0 TX | — | digital-input, digital-output, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fesp32-c3%2F&ref=openhardware.directory&product=heltec-esp32-c3&source=md-export) — $4.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fesp32-c3%2F&ref=openhardware.directory&product=heltec-esp32-c3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltec_ESP32&ref=openhardware.directory&product=heltec-esp32-c3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2F&ref=openhardware.directory&product=heltec-esp32-c3&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FESP32-C3_DevBoard%2FESP32-C3_DevBoard%28Rev1.1%29.pdf&ref=openhardware.directory&product=heltec-esp32-c3&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FESP32-C3_DevBoard%2FESP32-C3_DevBoard_Schematic_Diagram.pdf&ref=openhardware.directory&product=heltec-esp32-c3&source=md-export)

## Tags

`esp32-c3`, `risc-v`, `wifi`, `ble`, `battery`, `iot`, `heltec`, `arduino`, `low-power`, `usb-c`

---
[View full device page](https://openhardware.directory/s/1370/heltec-esp32-c3)

---

# Milk-V Mars

> Credit card-sized RISC-V SBC with quad-core StarFive JH7110 @ 1.5GHz, up to 8GB LPDDR4, Gigabit Ethernet with PoE, 40-pin GPIO, 4K HDMI. Raspberry Pi form factor.

## Quick Facts

- **Brand:** Milk-V
- **Board Type:** SBC
- **CPU:** StarFive JH7110
- **RAM:** Up to 8GB LPDDR4
- **Flash:** SPI Flash (bootloader)
- **GPIO:** 40 pins
- **USB:** 3x USB 3.0,1x USB 2.0
- **Power:** 5V/3A USB-C

## Connectivity

Ethernet Gigabit

## Components

- **StarFive JH7110** (Processor): 64-bit quad-core RV64GC processor at up to 1.5GHz with integrated GPU, VPU, and ISP for multimedia applications — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fraw.githubusercontent.com%2Fmilkv-mars%2Fmars-files%2Fmain%2FJH7110_Datasheet.pdf&ref=openhardware.directory&product=milk-v-mars&source=md-export)

## Protocols

- **MIPI CSI**
- **MIPI DSI**
- **HDMI**
- **I2C**
- **SPI**
- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fmilkv.io%2Fmars&ref=openhardware.directory&product=milk-v-mars&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fmilkv-mars&ref=openhardware.directory&product=milk-v-mars&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fraw.githubusercontent.com%2Fmilkv-mars%2Fmars-files%2Fmain%2FJH7110_Datasheet.pdf&ref=openhardware.directory&product=milk-v-mars&source=md-export)

## Tags

`risc-v`, `sbc`, `linux`, `milkv`, `starfive`, `raspberry-pi-compatible`, `4k`

---
[View full device page](https://openhardware.directory/s/1370/milk-v-mars)

---

# LILYGO T-Call SIM800

> ESP32 board with SIM800L 2G GSM/GPRS modem for SMS alerts, voice calls, and cellular data — ideal for remote monitoring and IoT projects needing cellular fallback on a budget.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$16.51
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C 2.0
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- esphome
- platformio

## Components

- **ESP32-D0WDQ6** (mcu): Espressif ESP32-D0WDQ6 dual-core Xtensa LX6 at 240MHz with WiFi and Bluetooth 4.2/BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-call-sim800&source=md-export)
- **SIM800L** (cellular-modem): SIMCom SIM800L quad-band GSM/GPRS modem supporting SMS, voice calls, and GPRS data up to 85.6 kbps. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsimcom.ee%2Fdocuments%2FSIM800L%2FSIM800L%2520Hardware%2520Design_V1.00.pdf&ref=openhardware.directory&product=lilygo-t-call-sim800&source=md-export)
- **IP5306** (battery-charger): INJOINIC IP5306 2A LiPo charger and boost converter with battery level indication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2110231230_INJOINIC-IP5306_C181749.pdf&ref=openhardware.directory&product=lilygo-t-call-sim800&source=md-export)
- **CH9102** (usb-uart): WCH CH9102 USB-to-UART converter for programming and serial debug. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fdownloads%2FCH9102DS1_PDF.html&ref=openhardware.directory&product=lilygo-t-call-sim800&source=md-export)

## Protocols

- **UART**: TX=GPIO1, RX=GPIO3
- **I2C**: SDA=GPIO21, SCL=GPIO22
- **SPI**: MOSI=GPIO23, MISO=GPIO19, CLK=GPIO18

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot / Free GPIO | — | digital-input, strapping |
| GPIO4 | SIM800 PWRKEY | — | digital-output |
| GPIO5 | SIM800 RESET | — | digital-output |
| GPIO26 | SIM800 RX | — | digital-input |
| GPIO27 | SIM800 TX | — | digital-output |
| GPIO21 | I2C SDA | — | digital-input, digital-output |
| GPIO22 | I2C SCL | — | digital-output |
| GPIO34 | Free ADC Input | — | digital-input, adc, input-only |
| GPIO35 | Free ADC Input | — | digital-input, adc, input-only |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-call-v1-4&ref=openhardware.directory&product=lilygo-t-call-sim800&source=md-export) — $16.51

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-call-v1-4&ref=openhardware.directory&product=lilygo-t-call-sim800&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T-Call-SIM800&ref=openhardware.directory&product=lilygo-t-call-sim800&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-call-sim800&source=md-export)

## Tags

`esp32`, `sim800l`, `gsm`, `gprs`, `2g`, `cellular`, `lilygo`, `sms`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-call-sim800)

---

# LILYGO T-Echo

> nRF52840 + SX1262 LoRa + L76K GPS all-in-one board with 1.54-inch e-paper display, 850mAh battery, Thread, Zigbee, and BLE 5.0 — runs Meshtastic, SoftRF, and custom NRF firmware out of the box.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$44.61
- **CPU:** ARM Cortex-M4F @ 64MHz, FPU, HW crypto (AES/SHA/CCM)
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C 2.0
- **Power:** 5V + LiPo

## Connectivity

Bluetooth BLE 5.0 | Zigbee Zigbee 3.0 (nRF52840)

## Compatible Firmware

- arduino
- platformio
- meshtastic
- meshcore

## Components

- **nRF52840** (mcu): Nordic Semiconductor nRF52840 ARM Cortex-M4F at 64MHz supporting BLE 5.0, Thread, Zigbee, ANT, and 802.15.4 simultaneously. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52840_PS_v1.7.pdf&ref=openhardware.directory&product=lilygo-t-echo&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver for 433/868/915 MHz with +22 dBm output and -148 dBm sensitivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-echo&source=md-export)
- **L76K** (gps): Quectel L76K multi-GNSS module supporting GPS, GLONASS, BeiDou, and QZSS with LNA and SAW filter. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.quectel.com%2Fwp-content%2Fuploads%2F2021%2F03%2FQuectel_L76K_GNSS_Specification_V1.0.pdf&ref=openhardware.directory&product=lilygo-t-echo&source=md-export)

## Protocols

- **SPI**: MOSI=P0.20, MISO=P0.21, CLK=P0.19, CS=P0.24
- **I2C**: SDA=P0.26, SCL=P0.27
- **UART**: TX=P0.15, RX=P0.17

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| P0.00 | XL1 (32kHz crystal) | — | digital-input |
| P0.11 | Button 1 | — | digital-input |
| P0.15 | GPS UART TX | — | digital-output |
| P0.17 | GPS UART RX | — | digital-input |
| P0.19 | LoRa SPI CLK | — | digital-output |
| P0.20 | LoRa SPI MOSI | — | digital-output |
| P0.21 | LoRa SPI MISO | — | digital-input |
| P0.24 | LoRa SPI CS | — | digital-output |
| P0.26 | I2C SDA | — | digital-input, digital-output |
| P0.27 | I2C SCL | — | digital-output |
| P1.01 | Button 2 | — | digital-input |
| P1.02 | Free GPIO | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-echo-lilygo&ref=openhardware.directory&product=lilygo-t-echo&source=md-export) — $44.61

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-echo-lilygo&ref=openhardware.directory&product=lilygo-t-echo&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGO-T-Echo&ref=openhardware.directory&product=lilygo-t-echo&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-echo&source=md-export)

## Tags

`nrf52840`, `lora`, `gps`, `e-paper`, `meshtastic`, `lilygo`, `thread`, `zigbee`, `ble5`, `off-grid`

## Certifications

CE, FCC, MIC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-echo)

---

# LILYGO T-CAN485

> ESP32 development board with integrated CAN bus and RS-485 transceivers, TF card, WiFi, and BLE for industrial IoT, Modbus, and automotive OBD-II applications with 5–12V wide-range power input.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$11.86
- **CPU:** Xtensa LX6 dual-core @ 240MHz
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5-12V DC

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf
- esphome
- micropython

## Components

- **ESP32-WROOM-32** (mcu): Xtensa LX6 dual-core at 240MHz with 4MB flash, WiFi 802.11 b/g/n, Bluetooth 4.2 Classic + BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-can485&source=md-export)

## Protocols

- **CAN**: TX=GPIO5, RX=GPIO4
- **RS-485**: TX=GPIO17, RX=GPIO16, EN=GPIO21
- **SPI**: CLK=GPIO18, MOSI=GPIO23, MISO=GPIO19
- **I2C**: SDA=GPIO21, SCL=GPIO22
- **UART**: TX=GPIO1, RX=GPIO3

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO5 | CAN TX | — | digital-output |
| GPIO4 | CAN RX | — | digital-input |
| GPIO17 | RS-485 TX | — | digital-output |
| GPIO16 | RS-485 RX | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-can485&ref=openhardware.directory&product=lilygo-t-can485&source=md-export) — $11.86

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-can485&ref=openhardware.directory&product=lilygo-t-can485&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-CAN485&ref=openhardware.directory&product=lilygo-t-can485&source=md-export)

## Tags

`esp32`, `can-bus`, `rs485`, `modbus`, `industrial`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-can485)

---

# LILYGO T5 V2.3.1

> LILYGO T5 V2.3.1 is a 2.13-inch e-paper display module with SSD1680 driver, supporting 212×104 black-and-white output via SPI. Ultra-low power design retains the image without any power supply.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** Display Module
- **Price:** ~$13.04
- **CPU:** None (display module)
- **RAM:** N/A
- **Flash:** none
- **USB:** None
- **Power:** 3.3V

## Compatible Firmware

- arduino

## Components

- **SSD1680** (display-driver): Solomon Systech SSD1680 active matrix e-paper display driver IC supporting 212×104 black-and-white output via SPI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.solomon-systech.com%2Fwp-content%2Fuploads%2F2023%2F12%2FSSD1675B.pdf&ref=openhardware.directory&product=lilygo-t5-v2-3-1&source=md-export)

## Protocols

- **SPI**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft5-v2-3-1&ref=openhardware.directory&product=lilygo-t5-v2-3-1&source=md-export) — $13.04

## Available Software

- [GxEPD2](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FZinggJM%2FGxEPD2&ref=openhardware.directory&product=lilygo-t5-v2-3-1&source=md-export)
- [LilyGo-T5-Epaper-Series](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T5-Epaper-Series&ref=openhardware.directory&product=lilygo-t5-v2-3-1&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft5-v2-3-1&ref=openhardware.directory&product=lilygo-t5-v2-3-1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T5-Epaper-Series&ref=openhardware.directory&product=lilygo-t5-v2-3-1&source=md-export)

## Tags

`e-paper`, `e-ink`, `display-module`, `spi`, `2.13-inch`, `ssd1680`, `ultra-low-power`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t5-v2-3-1)

---

# LILYGO T-Internet-COM

> ESP32 development board with LAN8720 Ethernet, 16MB flash, 8MB PSRAM, WS2812 RGB LED, SIM/TF card slots, and T-PCIE expansion support for industrial IoT, wired networking, and CAN bus applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$13.3
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5-12V DC

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2 | Ethernet 10/100 Mbps

## Compatible Firmware

- arduino
- esp-idf
- esphome

## Components

- **ESP32** (mcu): Dual-core 240MHz Xtensa LX6 with WiFi 802.11 b/g/n and BLE 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-internet-com&source=md-export)
- **LAN8720** (ethernet): Single-chip 10/100 Mbps Ethernet physical layer transceiver with flexible power management — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F8720a.pdf&ref=openhardware.directory&product=lilygo-t-internet-com&source=md-export)
- **WS2812B** (led): Addressable RGB LED on GPIO12 for status indication — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-internet-com&source=md-export)
- **CH9102** (usb-serial): USB to serial converter for programming via Type-C port — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH9102.html&ref=openhardware.directory&product=lilygo-t-internet-com&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **CAN**
- **I2S**
- **SDIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-internet-com&ref=openhardware.directory&product=lilygo-t-internet-com&source=md-export) — $13.30

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-internet-com&ref=openhardware.directory&product=lilygo-t-internet-com&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Internet-COM&ref=openhardware.directory&product=lilygo-t-internet-com&source=md-export)

## Tags

`esp32`, `ethernet`, `lan8720`, `can-bus`, `industrial-iot`, `wired-network`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-internet-com)

---

# LILYGO T5 E-Paper S3 Pro

> LILYGO T5 E-Paper S3 Pro is an ESP32-S3 board with a 4.7-inch 16-greyscale e-paper display, SX1262 LoRa, touch input, RTC, BQ25896/BQ27220 battery management, 16MB flash, 8MB PSRAM, and optional GPS.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$81.36
- **CPU:** Xtensa LX7 dual-core @ 240MHz
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio
- meshtastic

## Components

- **ESP32-S3-WROOM-1** (mcu): Espressif ESP32-S3-WROOM-1 module with 16MB flash, 8MB PSRAM, dual-core Xtensa LX7, WiFi, and Bluetooth 5 LE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro&source=md-export)
- **SX1262** (radio): Semtech SX1262 sub-GHz LoRa transceiver supporting 433/868/915MHz with +22dBm output power. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro&source=md-export)
- **ED047TC1** (display-driver): E Ink ED047TC1 4.7-inch e-paper display driver IC supporting 16 grey levels for rich monochrome rendering. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.eink.com%2Fdisplay_product.html&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro&source=md-export)
- **PCF8563** (rtc): NXP PCF8563 low-power real-time clock and calendar IC connected via I2C for accurate timekeeping. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FPCF8563.pdf&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro&source=md-export)
- **BQ25896** (pmic): Texas Instruments BQ25896 I2C-controlled 3A single-cell Li-Ion/LiPo battery charger with power path management. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fbq25896.pdf&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro&source=md-export)
- **BQ27220** (pmic): Texas Instruments BQ27220 single-cell Li-Ion battery fuel gauge IC providing accurate state-of-charge reporting via I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fbq27220.pdf&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft5-e-paper-s3-pro&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro&source=md-export) — $81.36
- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Flilygo-t5-s3-pro&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro&source=md-export) — €101.95

## Available Software

- [GxEPD2](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FZinggJM%2FGxEPD2&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro&source=md-export)
- [LilyGo T5 Epaper Series](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T5-Epaper-Series&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft5-e-paper-s3-pro&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T5-Epaper-Series&ref=openhardware.directory&product=lilygo-t5-e-paper-s3-pro&source=md-export)

## Tags

`e-paper`, `e-ink`, `esp32-s3`, `lora`, `sx1262`, `4.7-inch`, `grayscale`, `touch`, `rtc`, `gps`, `battery-management`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t5-e-paper-s3-pro)

---

# Evil Crow RF V2

> Open-source RF security research tool with ESP32, dual CC1101 sub-GHz transceivers (300-928MHz), and NRF24L01 2.4GHz module for penetration testing, signal analysis, and replay attacks.

## Quick Facts

- **Brand:** Evil Crow
- **Board Type:** security-tool
- **Price:** ~$41.39
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, hardware crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro-USB
- **Power:** 5V via Micro-USB

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- platformio
- esp-idf

## Components

- **ESP32-D0WDQ6** (mcu): Espressif ESP32-D0WDQ6 Xtensa LX6 dual-core SoC running at 240MHz with 520KB SRAM, WiFi 802.11 b/g/n, Bluetooth 4.2/BLE, hardware crypto acceleration (AES/SHA/RSA), and ULP co-processor. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=evil-crow-rf-v2&source=md-export)
- **CC1101** (sub-ghz-radio): Texas Instruments CC1101 low-power sub-1GHz RF transceiver covering 300-348MHz, 387-464MHz, and 779-928MHz bands with configurable modulation (OOK, 2-FSK, 4-FSK, GFSK, MSK) and data rates up to 600kbps. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fcc1101.pdf&ref=openhardware.directory&product=evil-crow-rf-v2&source=md-export)
- **CC1101** (sub-ghz-radio): Second CC1101 module enabling simultaneous transmit and receive on different sub-GHz frequencies for real-time signal capture and replay. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fcc1101.pdf&ref=openhardware.directory&product=evil-crow-rf-v2&source=md-export)
- **nRF24L01** (radio): Nordic Semiconductor nRF24L01 2.4GHz ISM-band transceiver enabling mousejacking attacks and 2.4GHz wireless communication at up to 2Mbps. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nordicsemi.com%2FProducts%2FnRF24-series&ref=openhardware.directory&product=evil-crow-rf-v2&source=md-export)
- **CP2102N** (usb-uart): Silicon Labs CP2102N USB-to-UART bridge IC providing serial communication for firmware flashing and debug output via Micro-USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2Fcp2102n-datasheet.pdf&ref=openhardware.directory&product=evil-crow-rf-v2&source=md-export)
- **AP2114H** (voltage-regulator): Diodes Incorporated AP2114H 1A low-dropout regulator converting 5V USB input to stable 3.3V for the ESP32 and RF modules. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.diodes.com%2Fassets%2FDatasheets%2FAP2114.pdf&ref=openhardware.directory&product=evil-crow-rf-v2&source=md-export)

## Protocols

- **SPI** (HSPI): SCK=GPIO14, MISO=GPIO12, MOSI=GPIO13, CS1=GPIO5, CS2=GPIO27
- **SPI** (VSPI (SD Card)): SCK=GPIO18, MISO=GPIO19, MOSI=GPIO23, CS=GPIO22
- **UART** (USB Serial): TX=GPIO1, RX=GPIO3

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | UART TX (USB) | — | digital-output |
| GPIO2 | CC1101 #1 TX (GDO0) | — | digital-input, digital-output, adc, pwm |
| GPIO3 | UART RX (USB) | — | digital-input |
| GPIO4 | CC1101 #1 RX (GDO2) | — | digital-input, digital-output, adc, touch, pwm |
| GPIO5 | CC1101 #1 CS | — | digital-input, digital-output, pwm |
| GPIO12 | SPI MISO (HSPI) | — | digital-input, digital-output, adc, touch, pwm |
| GPIO13 | SPI MOSI (HSPI) | — | digital-input, digital-output, adc, touch, pwm |
| GPIO14 | SPI SCK (HSPI) | — | digital-input, digital-output, adc, touch, pwm |
| GPIO18 | SD Card SCK (VSPI) | — | digital-input, digital-output, pwm |
| GPIO19 | SD Card MISO (VSPI) | — | digital-input, digital-output, pwm |
| GPIO22 | SD Card CS | — | digital-input, digital-output, pwm |
| GPIO23 | SD Card MOSI (VSPI) | — | digital-input, digital-output, pwm |
| GPIO25 | CC1101 #2 TX (GDO0) | — | digital-input, digital-output, adc, dac, pwm |
| GPIO26 | CC1101 #2 RX (GDO2) | — | digital-input, digital-output, adc, dac, pwm |
| GPIO27 | CC1101 #2 CS | — | digital-input, digital-output, adc, touch, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fryanyu%2Fevil-crow-rf-v2-transceiver-with-aluminu-case%2F&ref=openhardware.directory&product=evil-crow-rf-v2&source=md-export) — $41.39
- [KSEC Worldwide](https://openhardware.directory/r?to=https%3A%2F%2Flabs.ksec.co.uk%2Fproduct%2Fevil-crow-rf-v2%2F&ref=openhardware.directory&product=evil-crow-rf-v2&source=md-export) — $59.99
- [Hacker Warehouse](https://openhardware.directory/r?to=https%3A%2F%2Fhackerwarehouse.com%2Fproduct%2Fevil-crow-rf-v2%2F&ref=openhardware.directory&product=evil-crow-rf-v2&source=md-export) — $69.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fryanyu%2Fevil-crow-rf-v2-transceiver-with-aluminu-case%2F&ref=openhardware.directory&product=evil-crow-rf-v2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fjoelsernamoreno%2FEvilCrowRF-V2&ref=openhardware.directory&product=evil-crow-rf-v2&source=md-export)

## Tags

`rf-security`, `penetration-testing`, `sub-ghz`, `esp32`, `cc1101`, `nrf24l01`, `open-source`, `replay-attack`, `mousejacking`, `signal-analysis`

---
[View full device page](https://openhardware.directory/s/1370/evil-crow-rf-v2)

---

# DFRobot Beetle ESP32

> Compact ESP32 dual-core development board with WiFi, Bluetooth 4.2, sewable I/O pads, and wearable-friendly 35x34mm form factor for IoT and e-textile projects.

## Quick Facts

- **Brand:** DFRobot
- **Price:** ~$9.9
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **USB:** Micro-USB
- **Power:** 5V USB / DC 3.5-6.5V (VIN)
- **Dimensions:** 35 × 34mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Components

- **ESP32-PICO-D4** (mcu): Espressif ESP32-PICO-D4 System-in-Package with dual-core Xtensa LX6 at 240MHz, 520KB SRAM, WiFi 802.11 b/g/n, and Bluetooth 4.2 with BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-pico-d4_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-beetle-esp32&source=md-export)

## Protocols

- **I2C** (I2C0): SDA=SDA, SCL=SCL
- **UART** (Serial): TX=TX, RX=RX

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D2 | Digital I/O | — | digital-input, digital-output, pwm |
| D3 | Digital I/O | — | digital-input, digital-output, pwm |
| D4 | Digital I/O | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output, pwm |
| A0 | Analog Input | — | digital-input, digital-output, adc |
| A1 | Analog Input | — | digital-input, digital-output, adc |
| A2 | Analog Input | — | digital-input, digital-output, adc |
| A3 | Analog Input | — | digital-input, digital-output, adc |
| SDA | I2C Data | — | digital-input, digital-output |
| SCL | I2C Clock | — | digital-input, digital-output |
| TX | UART Transmit | — | digital-input, digital-output |
| RX | UART Receive | — | digital-input, digital-output |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1798.html&ref=openhardware.directory&product=dfrobot-beetle-esp32&source=md-export) — $9.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1798.html&ref=openhardware.directory&product=dfrobot-beetle-esp32&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FBeetle_ESP32_SKU_DFR0575&ref=openhardware.directory&product=dfrobot-beetle-esp32&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-pico-d4_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-beetle-esp32&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdfimg.dfrobot.com%2Fwiki%2F18603%2FDFR0575_beetle-esp32-wifi-bluetooth-board_schematics_v1.pdf&ref=openhardware.directory&product=dfrobot-beetle-esp32&source=md-export)

## Certifications

FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-beetle-esp32)

---

# LuckFox Pico

> Ultra-compact Linux SBC (51x21mm) based on Rockchip RV1103 with ARM Cortex-A7 @ 1.2GHz, RISC-V MCU co-processor, 0.5 TOPS NPU, ISP 3.2, 64MB DDR2, MIPI CSI camera, and 24 GPIO pins in a Pico form factor.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** linux-sbc
- **Price:** ~$8.99
- **CPU:** Rockchip RV1103
- **RAM:** 64MB DDR2
- **Flash:** microSD (TF)
- **GPIO:** 24 pins
- **USB:** USB-C 2.0
- **Power:** 5V
- **Dimensions:** 51 x 21mm

## Connectivity

Ethernet 10/100 Mbps

## Compatible Firmware

- buildroot

## Components

- **RV1103** (soc): Rockchip RV1103 vision processor — ARM Cortex-A7 @ 1.2GHz + RISC-V MCU + 0.5 TOPS NPU + ISP 3.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.luckfox.com%2Fwiki%2FLuckfox-Pico%2FPDF%2FRockchip%2520RV1103%2520Datasheet%2520V1.1-20220427.pdf&ref=openhardware.directory&product=luckfox-pico&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **PWM**
- **ADC**
- **MIPI CSI**
- **USB 2.0**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| 1 | GPIO1_B2_d | — | UART2_TX_M1 |
| 2 | GPIO1_B3_u | — | UART2_RX_M1 |
| 3 | GND | — | — |
| 4 | GPIO1_C7_d | — | UART4_CTS_M1 |
| 5 | GPIO1_C6_d | — | UART4_RTS_M1 |
| 6 | GPIO1_C5_d | — | UART4_TX_M1 |
| 7 | GPIO1_C4_d | — | UART4_RX_M1 |
| 8 | GND | — | — |
| 9 | GPIO1_D2_d | — | SPI0_CS1_M0, I2C3_SDA_M1, PWM0_M1 |
| 10 | GPIO1_D3_d | — | I2C3_SCL_M1, PWM11_IR_M2 |
| 11 | GPIO1_A2_d | — | SPI0_CS0_M0, PWM0_M0 |
| 12 | GPIO1_C0_d | — | PWM2_M2 |
| 13 | GND | — | — |
| 14 | GPIO1_C1_d | — | SPI0_CLK_M0, PWM4_M2 |
| 15 | GPIO1_C2_d | — | SPI0_MOSI_M0, PWM5_M2 |
| 16 | GPIO1_C3_d | — | SPI0_MISO_M0, PWM6_M2 |
| 17 | GPIO0_A4_d | — | PWM1_M0 |
| 18 | GND | — | — |
| 19 | GPIO1_D0_d | — | UART3_TX_M1, PWM3_IR_M2 |
| 20 | GPIO1_D1_d | — | UART3_RX_M1, PWM10_M2 |
| 21 | GPIO4_B1_d | — | — |
| 22 | GPIO4_B0_d | — | — |
| 23 | GND | — | — |
| 24 | GPIO4_A6_d | — | ETH_TXP |
| 25 | GPIO4_A2_d | — | ETH_TXN |
| 26 | GPIO4_A3_d | — | ETH_RXP |
| 27 | GPIO4_A4_d | — | ETH_RXN |
| 28 | GND | — | — |
| 29 | NC | — | — |
| 30 | GPIO4_C0_s | — | SARADC_IN0 |
| 31 | GPIO4_C1_z | — | SARADC_IN1 |
| 32 | GND | — | — |
| 33 | GND | — | — |
| 34 | NC | — | — |
| 35 | NC | — | — |
| 36 | 3V3_OUT | — | Power output |
| 37 | 3V3_EN | — | 3.3V enable |
| 38 | GND | — | — |
| 39 | VSYS | — | System voltage input |
| 40 | VBUS | — | USB VBUS 5V |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fraspberry-pi%2Fboards-kits%2Fraspberry-pi-pico-cat%2Fluckfox-pico.htm&ref=openhardware.directory&product=luckfox-pico&source=md-export) — $8.99
- [LuckFox Official](https://openhardware.directory/r?to=https%3A%2F%2Fwww.luckfox.com%2FEN-Luckfox-Pico&ref=openhardware.directory&product=luckfox-pico&source=md-export) — $8.99

## Available Software

- [LuckFox Pico SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-pico&source=md-export)
- [RKNN Toolkit](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Frockchip-linux%2Frknn-toolkit2&ref=openhardware.directory&product=luckfox-pico&source=md-export)
- [RTSP OpenCV Demo](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fluckfox-eng29%2Fluckfox_pico_rtsp_opencv&ref=openhardware.directory&product=luckfox-pico&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.luckfox.com%2FEN-Luckfox-Pico&ref=openhardware.directory&product=luckfox-pico&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-pico&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Pico%2FLuckfox-Pico-RV1103%2F&ref=openhardware.directory&product=luckfox-pico&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.luckfox.com%2Fwiki%2FLuckfox-Pico%2FPDF%2FRockchip%2520RV1103%2520Datasheet%2520V1.1-20220427.pdf&ref=openhardware.directory&product=luckfox-pico&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Pico-RV1103%2FDownloads%2F&ref=openhardware.directory&product=luckfox-pico&source=md-export)

## Tags

`linux`, `sbc`, `rockchip`, `rv1103`, `arm`, `risc-v`, `npu`, `ai-camera`, `mipi-csi`, `pico-form-factor`, `vision-processor`, `edge-ai`, `buildroot`

---
[View full device page](https://openhardware.directory/s/1370/luckfox-pico)

---

# LuckFox Pico Ultra

> Full-featured Linux SBC based on Rockchip RV1106G3 with 1.0 TOPS NPU, 256MB DDR3L, 8GB eMMC, 100M Ethernet (RJ45), optional WiFi 6/BT 5.2, MIPI CSI camera, RGB LCD display output, speaker, and PoE header.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** linux-sbc
- **Price:** ~$33.99
- **CPU:** Rockchip RV1106
- **RAM:** 256MB DDR3L
- **Flash:** 8GB eMMC
- **USB:** USB-C 2.0
- **Power:** 5V

## Connectivity

Ethernet 10/100 Mbps

## Compatible Firmware

- buildroot

## Components

- **RV1106** (soc): ARM Cortex-A7 @ 1.2GHz + RISC-V MCU + 1.0 TOPS NPU + ISP 3.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.luckfox.com%2Fwiki%2FLuckfox-Pico%2FPDF%2FRockchip%2520RV1106%2520Datasheet%2520V1.7-20231218.pdf&ref=openhardware.directory&product=luckfox-pico-ultra&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **PWM**
- **ADC**
- **MIPI CSI**
- **USB 2.0**
- **RGB LCD**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fraspberry-pi%2Fboards-kits%2Fraspberry-pi-pico-cat%2Fluckfox-pico-ultra.htm&ref=openhardware.directory&product=luckfox-pico-ultra&source=md-export) — $33.99

## Available Software

- [LuckFox Pico SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-pico-ultra&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fraspberry-pi%2Fboards-kits%2Fraspberry-pi-pico-cat%2Fluckfox-pico-ultra.htm&ref=openhardware.directory&product=luckfox-pico-ultra&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-pico-ultra&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Pico-Ultra&ref=openhardware.directory&product=luckfox-pico-ultra&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.luckfox.com%2Fwiki%2FLuckfox-Pico%2FPDF%2FRockchip%2520RV1106%2520Datasheet%2520V1.7-20231218.pdf&ref=openhardware.directory&product=luckfox-pico-ultra&source=md-export)

## Tags

`linux`, `sbc`, `rockchip`, `rv1106`, `arm`, `npu`, `ethernet`, `ai-camera`, `mipi-csi`, `rgb-lcd`, `emmc`, `poe`, `audio`

---
[View full device page](https://openhardware.directory/s/1370/luckfox-pico-ultra)

---

# Waveshare ESP32-S3-RS485-CAN

> Industrial ESP32-S3 control board with isolated RS-485 and CAN bus interfaces, 7-36V wide voltage input, PCF85063 RTC, DIN rail enclosure, and WiFi/Bluetooth for industrial IoT and automation applications.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$18.99
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 7-36V DC via screw terminal / 5V via USB-C
- **Dimensions:** 91.6 x 23.3 x 58.7mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 Xtensa LX7 dual-core @ 240MHz with 16MB flash, WiFi 802.11 b/g/n and BLE 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-rs485-can&source=md-export)
- **PCF85063** (rtc): NXP PCF85063 real-time clock with integrated crystal, alarm function, and SH1.0 backup battery header — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FPCF85063A.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-rs485-can&source=md-export)
- **ME6217C33M5G** (power-management): Microne ME6217C33M5G LDO providing 3.3V at up to 800mA — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F1912111437_MICRONE-Nanjing-Micro-One-Elec-ME6217C33M5G_C427602.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-rs485-can&source=md-export)

## Protocols

- **RS-485**
- **CAN**
- **I2C**
- **UART**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | General purpose (screw terminal) | — | digital-input, digital-output, adc, pwm |
| GPIO2 | General purpose (screw terminal) | — | digital-input, digital-output, adc, pwm |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-rs485-can.htm&ref=openhardware.directory&product=waveshare-esp32-s3-rs485-can&source=md-export) — $18.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-rs485-can.htm&ref=openhardware.directory&product=waveshare-esp32-s3-rs485-can&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam&ref=openhardware.directory&product=waveshare-esp32-s3-rs485-can&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-S3-RS485-CAN&ref=openhardware.directory&product=waveshare-esp32-s3-rs485-can&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FESP32-S3-RS485-CAN%2FESP32-S3-RS485-CAN-Schematic.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-rs485-can&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-rs485-can&source=md-export)

## Tags

`esp32-s3`, `rs485`, `can-bus`, `industrial`, `din-rail`, `isolated`, `modbus`, `iot`, `waveshare`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-esp32-s3-rs485-can)

---

# Radxa Rock S0

> Tiny Rockchip RK3308B SBC with up to 512MB DDR3, 8GB eMMC, microSD, WiFi 4, Bluetooth 5.0, and USB-C OTG — a postage-stamp Linux board for IoT and audio applications.

## Quick Facts

- **Brand:** Radxa
- **Board Type:** linux-sbc
- **Price:** ~$13.99
- **CPU:** Rockchip RK3308B
- **RAM:** 256MB / 512MB DDR3
- **Flash:** 4GB / 8GB eMMC
- **Power:** 5V

## Connectivity

WiFi WiFi 4 (802.11n) | Bluetooth BLE 5.0

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arace Tech](https://openhardware.directory/r?to=https%3A%2F%2Farace.tech%2Fproducts%2Fradxa-rock-s0&ref=openhardware.directory&product=radxa-rock-s0&source=md-export) — $13.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Frockpi%2Fs0&ref=openhardware.directory&product=radxa-rock-s0&source=md-export)
- [armbian](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fradxa-rock-s0%2F&ref=openhardware.directory&product=radxa-rock-s0&source=md-export)

## Tags

`radxa`, `rock-s0`, `rk3308b`, `sbc`, `linux`, `armbian`, `tiny`, `iot`, `audio`, `wifi`

---
[View full device page](https://openhardware.directory/s/1370/radxa-rock-s0)

---

# Adafruit ESP32-S2 Feather with w.FL Antenna

> The Adafruit ESP32-S2 Feather with w.FL is a Feather-form WiFi microcontroller board with a w.FL (MHF4) external antenna connector for extended range. It features a 240MHz ESP32-S2 single-core CPU, 4MB flash, 2MB PSRAM, native USB-C, and LiPo battery charging — no Bluetooth.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** ESP32-S2
- **Price:** ~$17.5
- **CPU:** ESP32-S2 Xtensa LX7 single-core @ 240MHz
- **RAM:** 320KB SRAM + 2MB PSRAM
- **Flash:** 4MB
- **USB:** USB-C (native USB CDC/HID/MSC)
- **Power:** USB-C 5V or LiPo battery
- **Dimensions:** 52.0mm × 22.7mm

## Connectivity

WiFi 2.4GHz 802.11 b/g/n

## Compatible Firmware

- circuitpython
- arduino
- esp-idf

## Components

- **ESP32-S2** (mcu): Single-core Xtensa LX7 at 240MHz with native USB OTG, WiFi 802.11 b/g/n, and no Bluetooth. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-feather-esp32-s2-wfl&source=md-export)
- **PSRAM 2MB** (memory): External 2MB pseudo-static RAM for expanded working memory. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6282&ref=openhardware.directory&product=adafruit-feather-esp32-s2-wfl&source=md-export)

## Protocols

- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: SCK=GPIO36, MOSI=GPIO35, MISO=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO17 | A0 — Analog Input | — | adc, digital-input, digital-output, pwm |
| GPIO18 | A1 — Analog Input | — | adc, digital-input, digital-output, pwm |
| GPIO14 | A2 — Analog Input / Touch T4 | — | adc, touch, digital-input, digital-output, pwm |
| GPIO15 | A3 — Analog Input / Touch T5 | — | adc, touch, digital-input, digital-output, pwm |
| GPIO16 | A4 — Analog Input | — | adc, digital-input, digital-output, pwm |
| GPIO8 | A5 — Analog Input / Touch T8 (ADC1, works during WiFi) | — | adc, touch, digital-input, digital-output, pwm |
| GPIO36 | SCK — SPI Clock | — | digital-input, digital-output, pwm |
| GPIO35 | MOSI — SPI Data Out | — | digital-input, digital-output, pwm |
| GPIO37 | MISO — SPI Data In | — | digital-input, digital-output, pwm |
| GPIO3 | SDA — I2C Data / STEMMA QT | — | digital-input, digital-output, pwm |
| GPIO4 | SCL — I2C Clock / STEMMA QT | — | digital-input, digital-output, pwm |
| GPIO5 | D5 — Digital GPIO | — | digital-input, digital-output, pwm |
| GPIO6 | D6 — Digital GPIO | — | digital-input, digital-output, pwm |
| GPIO9 | D9 — Digital GPIO / Touch T9 / ADC1_CH8 | — | adc, touch, digital-input, digital-output, pwm |
| GPIO10 | D10 — Digital GPIO / Touch T10 / ADC1_CH9 | — | adc, touch, digital-input, digital-output, pwm |
| GPIO11 | D11 — Digital GPIO | — | digital-input, digital-output, pwm |
| GPIO12 | D12 — Digital GPIO / Touch T12 | — | touch, digital-input, digital-output, pwm |
| GPIO13 | D13 / Red LED — Digital GPIO / Touch T13 | — | touch, digital-input, digital-output, pwm |
| GPIO43 | TX — UART0 Transmit | — | digital-input, digital-output, pwm |
| GPIO44 | RX — UART0 Receive | — | digital-input, digital-output, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6282&ref=openhardware.directory&product=adafruit-feather-esp32-s2-wfl&source=md-export) — $17.50

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_feather_esp32s2%2F&ref=openhardware.directory&product=adafruit-feather-esp32-s2-wfl&source=md-export)
- [Adafruit ESP32-S2 Feather Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-esp32-s2-feather&ref=openhardware.directory&product=adafruit-feather-esp32-s2-wfl&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6282&ref=openhardware.directory&product=adafruit-feather-esp32-s2-wfl&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-ESP32-S2-Feather-PCB&ref=openhardware.directory&product=adafruit-feather-esp32-s2-wfl&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-esp32-s2-feather&ref=openhardware.directory&product=adafruit-feather-esp32-s2-wfl&source=md-export)

## Tags

`adafruit`, `feather`, `esp32-s2`, `wifi`, `native-usb`, `wfl-antenna`, `psram`, `lipo`, `circuitpython`

## Certifications

CE, FCC, RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-esp32-s2-wfl)

---

# Adafruit Matrix Portal M4

> The Adafruit Matrix Portal M4 is a plug-in controller for HUB75 RGB LED matrix panels, featuring an ATSAMD51J19 Cortex-M4F at 120MHz, ESP32 WiFi coprocessor with TLS/SSL, LIS3DH accelerometer, USB-C power, and STEMMA QT — designed to drive 16×32 to 64×64 LED matrices directly.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$24.95
- **CPU:** ATSAMD51J19 ARM Cortex-M4F @ 120MHz
- **RAM:** 192 KB SRAM
- **Flash:** 512 KB
- **Power:** 5V
- **Dimensions:** 63.3mm × 44.5mm × 16mm

## Connectivity

WiFi 802.11 b/g/n (via ESP32 coprocessor, TLS/SSL)

## Compatible Firmware

- circuitpython
- arduino

## Components

- **ATSAMD51J19** (mcu): Microchip ATSAMD51J19 ARM Cortex-M4F at 120MHz with FPU, 192KB SRAM, 512KB internal flash — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM-D5x-E5x-Family-Data-Sheet-DS60001507G.pdf&ref=openhardware.directory&product=adafruit-matrix-portal-m4&source=md-export)
- **ESP32 (WiFi coprocessor)** (wifi-module): Espressif ESP32 dedicated WiFi coprocessor providing 802.11 b/g/n with TLS/SSL via SPI — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-matrix-portal-m4&source=md-export)
- **LIS3DH** (sensor): ST Microelectronics LIS3DH 3-axis MEMS accelerometer for orientation and tap detection — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flis3dh.pdf&ref=openhardware.directory&product=adafruit-matrix-portal-m4&source=md-export)

## Protocols

- **I2C**: SDA=SDA, SCL=SCL
- **SPI**
- **UART**
- **ADC**
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| SDA | SDA | — | I2C SDA, STEMMA QT |
| SCL | SCL | — | I2C SCL, STEMMA QT |
| A1 | A1 | — | GPIO, Analog, PWM (3-pin JST) |
| A2 | A2 | — | GPIO, Analog |
| A3 | A3 | — | GPIO, Analog |
| A4 | A4 | — | GPIO, Analog |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4745&ref=openhardware.directory&product=adafruit-matrix-portal-m4&source=md-export) — $24.95
- [Adafruit (Starter Kit)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4812&ref=openhardware.directory&product=adafruit-matrix-portal-m4&source=md-export) — $69.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4745&ref=openhardware.directory&product=adafruit-matrix-portal-m4&source=md-export)
- [docs](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-matrixportal-m4&ref=openhardware.directory&product=adafruit-matrix-portal-m4&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_MatrixPortal_M4&ref=openhardware.directory&product=adafruit-matrix-portal-m4&source=md-export)

## Tags

`adafruit`, `matrix-portal`, `circuitpython`, `wifi`, `led-matrix`, `hub75`, `samd51`, `esp32`, `digital-signage`

## Certifications

FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/adafruit-matrix-portal-m4)

---

# Heltec WiFi Kit 8

> ESP8266-based IoT development board by Heltec with built-in 0.91-inch OLED display, Li-Po battery management, and WiFi connectivity in a compact 50.9x18.2mm form factor.

## Quick Facts

- **Brand:** Heltec
- **Board Type:** Development Board
- **Price:** ~$7.59
- **CPU:** ESP8266
- **RAM:** 520 KB
- **Flash:** 4 MB
- **GPIO:** 17 pins
- **Power:** 5V via Micro USB

## Connectivity

WiFi 802.11n

## Compatible Firmware

- arduino
- platformio
- micropython
- esp-idf

## Components

- **ESP8266** (mcu): Espressif ESP8266 single-core Tensilica L06 SoC at 160 MHz with WiFi 802.11n — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2F0a-esp8266ex_datasheet_en.pdf&ref=openhardware.directory&product=heltec-wifi-kit-8&source=md-export)
- **SSD1306** (display-driver): Solomon Systech SSD1306 OLED/PLED driver with 128×64 max resolution, I2C/SPI interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=heltec-wifi-kit-8&source=md-export)
- **CP2104** (usb-uart): Silicon Labs CP2104 USB-to-UART bridge for programming and serial debug — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2Fcp2104.pdf&ref=openhardware.directory&product=heltec-wifi-kit-8&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **I2S**

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Links

- [official](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwifi-kit-8%2F&ref=openhardware.directory&product=heltec-wifi-kit-8&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwifi-kit-8%2F&ref=openhardware.directory&product=heltec-wifi-kit-8&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2F&ref=openhardware.directory&product=heltec-wifi-kit-8&source=md-export)
- [schematic](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWiFi_Kit_8%2FWIFI_Kit_8_Schematic_diagram.pdf&ref=openhardware.directory&product=heltec-wifi-kit-8&source=md-export)
- [pinout](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWiFi_Kit_8%2FWIFI_Kit_8_Pinout_Diagram.pdf&ref=openhardware.directory&product=heltec-wifi-kit-8&source=md-export)

## Tags

`esp8266`, `oled`, `wifi`, `iot`, `dev-board`, `heltec`, `battery-management`, `compact`

---
[View full device page](https://openhardware.directory/s/1370/heltec-wifi-kit-8)

---

# Arduino GIGA R1 WiFi

> Arduino's most powerful board — dual-core STM32H747XI with Cortex-M7 at 480MHz + Cortex-M4 at 240MHz, 2MB flash, 1MB RAM, WiFi, Bluetooth, 76 GPIO, USB-A + USB-C, 3.5mm audio jack, camera connector, and CAN bus in Mega/Due form factor.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$53
- **CPU:** ARM Cortex-M7 @ 480MHz,Cortex-M4 @ 240MHz, FPU, DSP
- **RAM:** 1MB SRAM
- **Flash:** 2MB
- **USB:** USB-C,USB-A Host
- **Power:** 5V via USB-C or 6-24V via Vin
- **Dimensions:** 101.52 × 53.34mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 4.2, BLE

## Compatible Firmware

- arduino
- micropython

## Components

- **STM32H747XI** (mcu): STMicroelectronics STM32H747XI with Cortex-M7 at 480MHz and Cortex-M4 at 240MHz, 2MB flash, 1MB RAM, hardware crypto, and DSP. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32h747xi.pdf&ref=openhardware.directory&product=arduino-giga-r1-wifi&source=md-export)
- **Murata-1DX** (mcu): Murata Type 1DX wireless module providing WiFi 802.11 b/g/n and Bluetooth 4.2 connectivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.murata.com%2Fen-us%2Fproducts%2Fconnectivitymodule%2Fwi-fi-bluetooth%2Foverview%2Flineup%2Ftype1dx&ref=openhardware.directory&product=arduino-giga-r1-wifi&source=md-export)

## Protocols

- **SPI**: MOSI=D51, MISO=D50, SCK=D52, SS=D53
- **I2C**: SDA=D20, SCL=D21
- **UART**: TX=D1, RX=D0
- **CAN FD**: CANRX=D9, CANTX=D10

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX | — | digital-input, digital-output |
| D1 | UART TX | — | digital-input, digital-output |
| D2 | PWM | — | digital-input, digital-output, pwm |
| D3 | PWM | — | digital-input, digital-output, pwm |
| D4 | PWM | — | digital-input, digital-output, pwm |
| D5 | PWM | — | digital-input, digital-output, pwm |
| D6 | PWM | — | digital-input, digital-output, pwm |
| D7 | PWM | — | digital-input, digital-output, pwm |
| D8 | PWM | — | digital-input, digital-output, pwm |
| D9 | CAN RX / PWM | — | digital-input, digital-output, pwm |
| D10 | CAN TX / PWM | — | digital-input, digital-output, pwm |
| D11 | PWM | — | digital-input, digital-output, pwm |
| D12 | PWM | — | digital-input, digital-output, pwm |
| D13 | LED / PWM | — | digital-input, digital-output, pwm |
| A0 | Analog Input / DAC0 | — | adc, dac, digital-input, digital-output |
| A1 | Analog Input / DAC1 | — | adc, dac, digital-input, digital-output |
| A2 | Analog Input | — | adc, digital-input, digital-output |
| A3 | Analog Input | — | adc, digital-input, digital-output |
| A4 | Analog Input | — | adc, digital-input, digital-output |
| A5 | Analog Input | — | adc, digital-input, digital-output |
| A6 | Analog Input | — | adc, digital-input, digital-output |
| A7 | Analog Input | — | adc, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fgiga-r1-wifi&ref=openhardware.directory&product=arduino-giga-r1-wifi&source=md-export) — $53.00
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fgiga-r1-wifi&ref=openhardware.directory&product=arduino-giga-r1-wifi&source=md-export) — €58.47
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FABX00063%2F18075937&ref=openhardware.directory&product=arduino-giga-r1-wifi&source=md-export) — $62.40
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FABX00063&ref=openhardware.directory&product=arduino-giga-r1-wifi&source=md-export) — $62.40
- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB0BZ2LN2WJ&ref=openhardware.directory&product=arduino-giga-r1-wifi&source=md-export) — $62.40
- [SparkFun](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sparkfun.com%2Farduino-giga-r1-wifi.html&ref=openhardware.directory&product=arduino-giga-r1-wifi&source=md-export) — $62.40

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fgiga-r1-wifi&ref=openhardware.directory&product=arduino-giga-r1-wifi&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fgiga-r1-wifi%2F&ref=openhardware.directory&product=arduino-giga-r1-wifi&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FABX00063-datasheet.pdf&ref=openhardware.directory&product=arduino-giga-r1-wifi&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fschematics%2FABX00063-schematics.pdf&ref=openhardware.directory&product=arduino-giga-r1-wifi&source=md-export)

## Tags

`arduino`, `giga`, `stm32h747`, `dual-core`, `wifi`, `bluetooth`, `audio`, `camera`, `can-bus`, `usb-c`

---
[View full device page](https://openhardware.directory/s/1370/arduino-giga-r1-wifi)

---

# BigTreeTech TFT35 V3.0

> 3.5-inch dual-mode 3D printer display with STM32 processor supporting both touchscreen TFT mode and classic 12864 LCD mode. Compatible with Marlin and most BIGTREETECH control boards.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Display
- **CPU:** STM32F207VCT6 ARM Cortex-M3 @ 120MHz
- **RAM:** 256KB SRAM
- **Flash:** 256KB Flash
- **Power:** 5V DC

## Compatible Firmware

- Marlin
- Klipper

## Components

- **STM32F207VCT6** (mcu): STMicroelectronics STM32F207VCT6 32-bit ARM Cortex-M3 microcontroller at 120MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fen%2Fmicrocontrollers-microprocessors%2Fstm32f207vc.html&ref=openhardware.directory&product=bigtreetech-tft35-v3-0&source=md-export)

## Protocols

- **UART**
- **SPI**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-tft35-v3-0-display-two-working-modes&ref=openhardware.directory&product=bigtreetech-tft35-v3-0&source=md-export)

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBIGTREETECH-TFT35-V3.0&ref=openhardware.directory&product=bigtreetech-tft35-v3-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-tft35-v3-0-display-two-working-modes&ref=openhardware.directory&product=bigtreetech-tft35-v3-0&source=md-export)

## Tags

`3d-printing`, `display`, `touchscreen`, `tft35`, `dual-mode`, `12864`, `marlin`, `klipper`, `bigtreetech`, `stm32`, `3.5-inch`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-tft35-v3-0)

---

# BigTreeTech TFT35-E3 V3.0

> 3.5-inch dual-mode display designed as a direct replacement for the Ender 3 stock LCD. STM32 based with touchscreen TFT and 12864 emulation modes, supports SD and USB printing.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Display
- **CPU:** STM32F207VCT6 ARM Cortex-M3 @ 120MHz
- **RAM:** 256KB SRAM
- **Flash:** 256KB Flash
- **Power:** 5V DC

## Compatible Firmware

- Marlin
- Klipper

## Components

- **STM32F207VCT6** (mcu): STMicroelectronics STM32F207VCT6 32-bit ARM Cortex-M3 microcontroller at 120MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fen%2Fmicrocontrollers-microprocessors%2Fstm32f207vc.html&ref=openhardware.directory&product=bigtreetech-tft35-e3-v3-0&source=md-export)

## Protocols

- **UART**
- **SPI**
- **RS232**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbtt-tft35-e3-v3-0-display-touch-screen-two-working-modes&ref=openhardware.directory&product=bigtreetech-tft35-e3-v3-0&source=md-export)

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBTT-TFT35-E3-V3.0&ref=openhardware.directory&product=bigtreetech-tft35-e3-v3-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbtt-tft35-e3-v3-0-display-touch-screen-two-working-modes&ref=openhardware.directory&product=bigtreetech-tft35-e3-v3-0&source=md-export)

## Tags

`3d-printing`, `display`, `touchscreen`, `tft35`, `ender-3`, `dual-mode`, `12864`, `marlin`, `klipper`, `bigtreetech`, `stm32`, `3.5-inch`, `creality`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-tft35-e3-v3-0)

---

# BigTreeTech TFT43/TFT50/TFT70 V3.0

> Larger-format dual-mode 3D printer displays in 4.3-inch, 5-inch, and 7-inch variants. STM32-based with touchscreen TFT and 12864 LCD emulation modes, SD/USB printing, compatible with Marlin.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Display
- **CPU:** STM32F207VCT6 ARM Cortex-M3 @ 120MHz
- **RAM:** 256KB SRAM
- **Flash:** 256KB Flash
- **Power:** 5V DC

## Compatible Firmware

- Marlin
- Klipper

## Components

- **STM32F207VCT6** (mcu): STMicroelectronics STM32F207VCT6 32-bit ARM Cortex-M3 microcontroller at 120MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fen%2Fmicrocontrollers-microprocessors%2Fstm32f207vc.html&ref=openhardware.directory&product=bigtreetech-tft43-tft50-tft70-v3-0&source=md-export)

## Protocols

- **UART**
- **SPI**
- **RS232**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbtt-tft43-v3-0-tft50-v3-0-tft70-v3-0-display-touch-screen-two-working-modes&ref=openhardware.directory&product=bigtreetech-tft43-tft50-tft70-v3-0&source=md-export)

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBIGTREETECH-TouchScreenFirmware&ref=openhardware.directory&product=bigtreetech-tft43-tft50-tft70-v3-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbtt-tft43-v3-0-tft50-v3-0-tft70-v3-0-display-touch-screen-two-working-modes&ref=openhardware.directory&product=bigtreetech-tft43-tft50-tft70-v3-0&source=md-export)

## Tags

`3d-printing`, `display`, `touchscreen`, `tft43`, `tft50`, `tft70`, `dual-mode`, `12864`, `marlin`, `klipper`, `bigtreetech`, `stm32`, `large-display`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-tft43-tft50-tft70-v3-0)

---

# BigTreeTech TFT35-SPI V2.1

> 3.5-inch 480x320 SPI touchscreen display for 3D printers, designed for CB1-based boards. Uses ILI9488 SPI LCD driver and NS2009 I2C touch controller, includes an IO2CAN module option.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Display
- **CPU:** Controlled by host CPU via SPI/I2C
- **RAM:** N/A (host-controlled)
- **Flash:** N/A (host-controlled)
- **Power:** 5V DC

## Compatible Firmware

- Klipper

## Components

- **ILI9488** (display-driver): Ilitek ILI9488 SPI LCD display driver for 480x320 TFT screens — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FILI9488.pdf&ref=openhardware.directory&product=bigtreetech-tft35-spi-v2-1&source=md-export)
- **NS2009** (touch-controller): NS2009 resistive touchscreen controller using I2C interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FTFT35-SPI&ref=openhardware.directory&product=bigtreetech-tft35-spi-v2-1&source=md-export)

## Protocols

- **SPI**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-tft35-spi-v2-1-touchscreen-io2can-module&ref=openhardware.directory&product=bigtreetech-tft35-spi-v2-1&source=md-export)

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FTFT35-SPI&ref=openhardware.directory&product=bigtreetech-tft35-spi-v2-1&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-tft35-spi-v2-1-touchscreen-io2can-module&ref=openhardware.directory&product=bigtreetech-tft35-spi-v2-1&source=md-export)

## Tags

`3d-printing`, `display`, `touchscreen`, `tft35`, `spi`, `cb1`, `klipper`, `bigtreetech`, `3.5-inch`, `io2can`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-tft35-spi-v2-1)

---

# BigTreeTech Pi TFT43 V2.0

> 4.3-inch 800x480 IPS capacitive touchscreen expansion board for BTT Pi, CB1, CB2, and Raspberry Pi CM4. Connects via 40-pin GPIO DPI interface with GT911 touch controller for Klipper UI.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Display
- **CPU:** Controlled by host SoC (DPI)
- **RAM:** N/A (host-controlled)
- **Flash:** N/A (host-controlled)
- **Power:** 5V via GPIO

## Compatible Firmware

- Klipper

## Components

- **GT911** (touch-controller): Goodix GT911 multi-point capacitive touch controller via I2C, supports up to 5-point touch — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.goodix.com%2Fen%2Fproduct%2Ftouch%2Fgeneral_touch_controller%2FGT9XX-Series%2FGT911&ref=openhardware.directory&product=bigtreetech-pi-tft43-v2-0&source=md-export)

## Protocols

- **I2C**
- **DPI**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-pi-tft43-v2-0-screen-board&ref=openhardware.directory&product=bigtreetech-pi-tft43-v2-0&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-pi-tft43-v2-0-screen-board&ref=openhardware.directory&product=bigtreetech-pi-tft43-v2-0&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBTT-Pi&ref=openhardware.directory&product=bigtreetech-pi-tft43-v2-0&source=md-export)

## Tags

`3d-printing`, `display`, `touchscreen`, `klipper`, `klipperscreen`, `4.3-inch`, `ips`, `bigtreetech`, `cb1`, `cb2`, `raspberry-pi-cm4`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-pi-tft43-v2-0)

---

# LILYGO T-2CAN

> LILYGO T-2CAN is an ESP32-S3 development board featuring dual CAN bus interfaces via two TWAI controllers, Wi-Fi, Bluetooth 5 LE, and wide DC input range for automotive and industrial applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$24.36
- **CPU:** ESP32-S3
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5-12V DC

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-S3** (mcu): ESP32-S3 dual-core LX7 processor with 16MB flash, 8MB PSRAM, Wi-Fi, and Bluetooth 5 LE, featuring dual TWAI (CAN) controllers — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-2can&source=md-export)
- **TWAI Controller #1** (can-controller): ESP32-S3 integrated TWAI (Two-Wire Automotive Interface) controller providing CAN 2.0 bus interface, channel 1 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-2can&source=md-export)
- **TWAI Controller #2** (can-controller): ESP32-S3 integrated TWAI (Two-Wire Automotive Interface) controller providing CAN 2.0 bus interface, channel 2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-2can&source=md-export)

## Protocols

- **CAN**
- **I2C**
- **SPI**
- **UART**
- **GPIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-2can&ref=openhardware.directory&product=lilygo-t-2can&source=md-export) — $24.36

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-2can&ref=openhardware.directory&product=lilygo-t-2can&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-2Can&ref=openhardware.directory&product=lilygo-t-2can&source=md-export)

## Tags

`esp32-s3`, `can-bus`, `automotive`, `industrial`, `twai`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-2can)

---

# LILYGO T-SIM7600

> ESP32 development board with SIM7600 LTE Cat-4 modem (150Mbps DL), GPS, 18650 battery holder with solar charging interface, and dual USB-C ports for high-speed cellular IoT applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$49.78
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C (dual)
- **Power:** 5V + Solar

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf
- platformio

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 at up to 240MHz with Wi-Fi and Bluetooth 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-sim7600&source=md-export)
- **SIM7600** (cellular-modem): SIM7600 series LTE Cat-4 modem with GPS; 150 Mbps DL / 50 Mbps UL; regional variants E-H, G-H, SA-H — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsimcom.ee%2Fdocuments%2FSIM7600E%2FSIM7600E_Hardware_Design_V1.06.pdf&ref=openhardware.directory&product=lilygo-t-sim7600&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-sim7600&ref=openhardware.directory&product=lilygo-t-sim7600&source=md-export) — $49.78

## Available Software

- [Arduino IDE](https://openhardware.directory/r?to=https%3A%2F%2Fwww.arduino.cc%2F&ref=openhardware.directory&product=lilygo-t-sim7600&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-sim7600&ref=openhardware.directory&product=lilygo-t-sim7600&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-SIM7600X&ref=openhardware.directory&product=lilygo-t-sim7600&source=md-export)

## Tags

`esp32`, `lte`, `4g`, `sim7600`, `gps`, `solar`, `cellular-iot`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-sim7600)

---

# DFRobot FireBeetle 2 ESP32-C5 Development Kit

> ESP32-C5 RISC-V development kit with dual-band WiFi 6 (2.4/5GHz), BLE 5, Zigbee 3.0, Thread 1.3, and Matter support. Features solar charging, 21uA deep sleep, IO expansion board, and 18 digital I/O pins at just $8.90.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** dev-board
- **Price:** ~$8.9
- **CPU:** ESP32-C5 RISC-V single-core @ 240MHz
- **RAM:** 384KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V via USB-C or 4.5-6V solar panel
- **Dimensions:** 25.4 x 60mm

## Connectivity

WiFi 802.11 b/g/n/ax (WiFi 6) 2.4/5GHz | Bluetooth BLE 5.0 | Zigbee Zigbee 3.0

## Components

- **ESP32-C5** (mcu): Espressif ESP32-C5 RISC-V single-core at 240MHz with dual-band WiFi 6, BLE 5, Zigbee 3.0, Thread 1.3, 384KB SRAM, 4MB flash. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c5_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-c5&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO8 | D2 / LCD_DC | — | digital-input, digital-output, pwm |
| GPIO15 | D13 / LCD_BL | — | digital-input, digital-output, pwm |
| GPIO23 | SPI SCLK | — | digital-input, digital-output |
| GPIO24 | SPI MOSI | — | digital-input, digital-output |
| GPIO25 | SPI MISO | — | digital-input, digital-output |
| GPIO26 | D3 / LCD_RST | — | digital-input, digital-output |
| GPIO27 | D6 / SPI CS | — | digital-input, digital-output |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2977.html&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-c5&source=md-export) — $8.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2977.html&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-c5&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_DFR1236_FireBeetle_2_ESP32_C5_Development_Board_IO_Expansion_Kit&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-c5&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c5_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-c5&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-firebeetle-2-esp32-c5)

---

# DFRobot Beetle ESP32-C6

> Coin-sized (25×20.5mm) ESP32-C6 wearable dev board with WiFi 6, BLE 5, Thread, Zigbee, Matter, integrated LiPo charger, and 14µA deep sleep — for $4.90.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** dev-board
- **Price:** ~$4.9
- **CPU:** RISC-V single-core @ 160MHz
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** USB-C or LiPo battery
- **Dimensions:** 25 × 20.5mm

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.0 | Zigbee Zigbee 3.0

## Compatible Firmware

- arduino
- micropython
- esp-idf
- esphome

## Components

- **ESP32-C6** (mcu): Espressif ESP32-C6 with RISC-V @ 160MHz, 512KB SRAM, 4MB flash, WiFi 6, BLE 5, Zigbee, Thread, and Matter support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-beetle-esp32-c6&source=md-export)
- **lipo-charger-beetle** (battery-charger): Onboard single-cell LiPo charging management with 0.5A max charge current, deep sleep at 14µA. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2Fdfr1117%2F&ref=openhardware.directory&product=dfrobot-beetle-esp32-c6&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **I2S**
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | GPIO / ADC | — | digital-input, digital-output, adc, pwm |
| D1 | GPIO / ADC | — | digital-input, digital-output, adc, pwm |
| D2 | GPIO / ADC | — | digital-input, digital-output, adc, pwm |
| D3 | GPIO / ADC | — | digital-input, digital-output, adc |
| D4 | SDA | — | digital-input, digital-output |
| D5 | SCL | — | digital-input, digital-output |
| D6 | SPI CLK | — | digital-input, digital-output |
| D7 | SPI MOSI | — | digital-output |
| D8 | SPI MISO | — | digital-input |
| D9 | UART TX | — | digital-input, digital-output |
| D10 | UART RX | — | digital-input, digital-output |
| D11 | GPIO | — | digital-input, digital-output |
| D12 | GPIO / IR | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2778.html&ref=openhardware.directory&product=dfrobot-beetle-esp32-c6&source=md-export) — 4.90

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2778.html&ref=openhardware.directory&product=dfrobot-beetle-esp32-c6&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2Fdfr1117%2F&ref=openhardware.directory&product=dfrobot-beetle-esp32-c6&source=md-export)

## Tags

`esp32-c6`, `wifi6`, `thread`, `zigbee`, `matter`, `ble`, `wearable`, `tiny`, `dfrobot`, `beetle`, `lipo`

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-beetle-esp32-c6)

---

# Adafruit Monster M4SK

> The Adafruit Monster M4SK is a wearable dual-display Halloween mask board powered by ATSAMD51 Cortex-M4F at 120MHz with 8MB flash, two 240×240 IPS TFT eye displays, stereo audio, microphone, STEMMA connectors, and LiPo battery support for animated eye and mask projects.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$79.95
- **CPU:** ATSAMD51J20 ARM Cortex-M4F @ 120MHz
- **RAM:** 256 KB
- **Flash:** 8 MB SPI flash
- **Power:** LiPo 3.7V battery (JST connector) or USB

## Compatible Firmware

- circuitpython
- arduino

## Components

- **ATSAMD51J20** (mcu): Microchip ATSAMD51J20 ARM Cortex-M4F at 120MHz with FPU, 256KB RAM, 1MB internal flash — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM-D5x-E5x-Family-Data-Sheet-DS60001507G.pdf&ref=openhardware.directory&product=adafruit-monster-m4sk&source=md-export)
- **INA219** (sensor): Power monitoring and battery management for LiPo charging and status — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-monster-m4sk%2Foverview&ref=openhardware.directory&product=adafruit-monster-m4sk&source=md-export)

## Protocols

- **I2C**: SDA=SDA, SCL=SCL
- **SPI**
- **UART**
- **ADC**
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | D0 | — | GPIO, STEMMA Digital |
| D1 | D1 | — | GPIO, STEMMA Analog |
| SDA | SDA | — | I2C SDA, STEMMA QT |
| SCL | SCL | — | I2C SCL, STEMMA QT |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4281&ref=openhardware.directory&product=adafruit-monster-m4sk&source=md-export) — $79.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4281&ref=openhardware.directory&product=adafruit-monster-m4sk&source=md-export)
- [docs](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-monster-m4sk%2Foverview&ref=openhardware.directory&product=adafruit-monster-m4sk&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_Learning_System_Guides&ref=openhardware.directory&product=adafruit-monster-m4sk&source=md-export)

## Tags

`adafruit`, `monster-m4sk`, `wearable`, `circuitpython`, `samd51`, `halloween`, `dual-display`, `animated-eyes`, `lipo`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-monster-m4sk)

---

# Heltec HT-DE01 Multi Size E-Ink Drive Board

> A compact universal e-ink driver board based on ESP32-S3FN8 with WiFi and Bluetooth connectivity, 24-pin FFC interface compatible with most e-ink displays, USB-C and LiPo battery support, and Arduino development environment.

## Quick Facts

- **Brand:** Heltec Automation
- **Price:** ~$9.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, vector instructions
- **RAM:** 512KB SRAM
- **Flash:** 8MB (QSPI)
- **USB:** USB-C (via CP2102 UART bridge)
- **Power:** 5V via USB-C,3.7V LiPo battery (SH1.25-2)
- **Dimensions:** 49 × 25mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0, Bluetooth Mesh

## Components

- **ESP32-S3FN8** (mcu): Xtensa LX7 dual-core processor at 240MHz with 8MB flash, WiFi 802.11 b/g/n and Bluetooth 5 (BLE + Mesh). Provides the main processing, wireless connectivity, and SPI bus for e-ink display control. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-ht-de01&source=md-export)
- **CP2102** (usb-uart): Silicon Labs USB 2.0 full-speed to UART bridge IC providing serial programming and debug interface via USB-C connector. Includes DTR/RTS auto-reset circuit for one-click flashing. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=heltec-ht-de01&source=md-export)
- **TP4054** (battery-charger): Standalone linear Li-Ion/LiPo battery charger with constant current/constant voltage algorithm, thermal regulation, and charge status indicator. Programmed for charging via the 2K resistor on PROG pin. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fmedia.digikey.com%2Fpdf%2FData%2520Sheets%2FUTD%2520Semi%2520PDFs%2FTP4054.pdf&ref=openhardware.directory&product=heltec-ht-de01&source=md-export)
- **CE6260B33M** (voltage-regulator): Low-dropout CMOS voltage regulator from Chipower providing stable 3.3V output with high PSRR (Power Supply Rejection Ratio) to power the ESP32-S3 and peripherals. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.alldatasheet.com%2Fdatasheet-pdf%2Fpdf%2F2132598%2FCHIPOWER%2FCE6260B33M.html&ref=openhardware.directory&product=heltec-ht-de01&source=md-export)

## Protocols

- **SPI** (E-Ink SPI): CLK=GPIO3, MOSI=GPIO2, CS=GPIO5, DC=GPIO4, RST=GPIO6, BUSY=GPIO7
- **UART** (UART0): TX=GPIO43, RX=GPIO44
- **FFC** (E-Ink FFC): 24-pin FFC connector=Directly wired to SPI + power rails

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot / User Button (BTN-0) | — | digital-input, digital-output, strapping |
| GPIO2 | E-Ink SDI (MOSI) | — | digital-input, digital-output, pwm, adc, touch |
| GPIO3 | E-Ink CLK (SCK) | — | digital-input, digital-output, pwm, adc, touch |
| GPIO4 | E-Ink D/C (Data/Command) | — | digital-input, digital-output, pwm, adc, touch |
| GPIO5 | E-Ink CS (Chip Select) | — | digital-input, digital-output, pwm, adc, touch |
| GPIO6 | E-Ink RST (Reset) | — | digital-input, digital-output, pwm |
| GPIO7 | E-Ink BUSY | — | digital-input, digital-output, pwm |
| GPIO8 | General Purpose IO | — | digital-input, digital-output, pwm |
| GPIO43 | UART0 TX | — | digital-input, digital-output, pwm |
| GPIO44 | UART0 RX | — | digital-input, digital-output, pwm |

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fe-ink-driveboard%2F&ref=openhardware.directory&product=heltec-ht-de01&source=md-export) — 9.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fe-ink-driveboard%2F&ref=openhardware.directory&product=heltec-ht-de01&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltec_ESP32&ref=openhardware.directory&product=heltec-ht-de01&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.org%2Fen%2Fnode%2Fesp32%2Fht_de01%2Findex.html&ref=openhardware.directory&product=heltec-ht-de01&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-DE01%2FUniversal%2520E-Ink%2520Driver.pdf&ref=openhardware.directory&product=heltec-ht-de01&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-DE01%2FHTDE01_sch.pdf&ref=openhardware.directory&product=heltec-ht-de01&source=md-export)

## Tags

`e-ink`, `e-paper`, `ESP32-S3`, `display-driver`, `wireless`, `battery-powered`, `arduino`, `heltec`

---
[View full device page](https://openhardware.directory/s/1370/heltec-ht-de01)

---

# Heltec HT-M01S Indoor LoRa Gateway (Rev.2.0)

> Compact 8-channel LoRaWAN gateway based on ESP32 and SX1303 + SX1250, with WiFi and Ethernet backhaul, 1.8-inch TFT display, and aluminum housing. Supports LoRaWAN Class A/C, TTN, and ChirpStack.

## Quick Facts

- **Brand:** Heltec Automation
- **Price:** ~$99
- **CPU:** ESP32-D0WDQ6 Xtensa LX6 dual-core @ 240MHz
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB Type-C
- **Power:** 5V
- **Dimensions:** 70 × 70 × 23mm

## Connectivity

WiFi 802.11 b/g/n | Ethernet 100Mbps RJ45

## Components

- **ESP32-D0WDQ6** (mcu): Xtensa LX6 dual-core @ 240MHz with 520KB SRAM, WiFi 802.11 b/g/n and Bluetooth 4.2. Runs the LoRa packet forwarder and web configuration interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=heltec-ht-m01s-v2&source=md-export)
- **SX1303** (radio): Semtech SX1303 multi-channel LoRa baseband processor supporting 8 uplink and 1 downlink channel with fine timestamp for TDOA geolocation. Pin-compatible with SX1302. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2Fdatasheet%2F2%2F761%2FSemtech_DS_SX1303_W_APP_V1_2-1919724.pdf&ref=openhardware.directory&product=heltec-ht-m01s-v2&source=md-export)
- **SX1250** (radio): Semtech SX1250 half-duplex RF transceiver covering 150-960 MHz with up to +22 dBm output power. Paired with SX1303 for complete gateway receive/transmit chain. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2Fdatasheet%2F2%2F761%2FSemtech_08072019_DS_SX1250_V1.1-1626823.pdf&ref=openhardware.directory&product=heltec-ht-m01s-v2&source=md-export)
- **ST7735** (display-driver): Drives the 1.8-inch TFT display showing gateway status, device ID, IP address, frequency band, and RX/TX packet statistics. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7735.pdf&ref=openhardware.directory&product=heltec-ht-m01s-v2&source=md-export)

## Protocols

- **SPI**
- **SPI** (SPI1)
- **Ethernet**

## Where to Buy

- [Heltec Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-m01s-v2%2F&ref=openhardware.directory&product=heltec-ht-m01s-v2&source=md-export) — $99.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-m01s-v2%2F&ref=openhardware.directory&product=heltec-ht-m01s-v2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltecDocs&ref=openhardware.directory&product=heltec-ht-m01s-v2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.org%2Fen%2Fgateway%2Fht-m01s_v2%2F&ref=openhardware.directory&product=heltec-ht-m01s-v2&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-M01S_V2%2FHT-M01S-V2%28V1.1%29.pdf&ref=openhardware.directory&product=heltec-ht-m01s-v2&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/heltec-ht-m01s-v2)

---

# Arduino UNO R4 WiFi

> Arduino's flagship UNO board upgraded with Renesas RA4M1 ARM Cortex-M4F at 48MHz, ESP32-S3 WiFi/BLE 5.0, built-in 12×8 LED matrix, 12-bit DAC, CAN bus, op-amp, and Qwiic connector — all in the classic UNO form factor at 5V.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$22
- **CPU:** ARM Cortex-M4F @ 48MHz, FPU, DSP
- **RAM:** 32KB SRAM
- **Flash:** 256KB,8KB EEPROM
- **USB:** USB-C 2.0 (Full-Speed)
- **Power:** 5V via USB-C or 6-24V via Vin
- **Dimensions:** 68.85 × 53.34mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython

## Components

- **R7FA4M1AB3CFM** (mcu): Renesas RA4M1 ARM Cortex-M4F at 48MHz with FPU, DSP, 256KB flash, 32KB SRAM, 14-bit ADC, 12-bit DAC, CAN 2.0B, USB 2.0 Full-Speed, and capacitive touch sensing. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2Fra4m1-datasheet.pdf&ref=openhardware.directory&product=arduino-uno-r4-wifi&source=md-export)
- **ESP32-S3-MINI-1-N8** (mcu): Espressif ESP32-S3 module with Xtensa LX7 dual-core at 240MHz, 8MB flash, WiFi 802.11 b/g/n, and Bluetooth LE 5.0. Handles wireless connectivity, OTA updates, and USB bridge. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-mini-1_mini-1u_datasheet_en.pdf&ref=openhardware.directory&product=arduino-uno-r4-wifi&source=md-export)
- **12x8 LED Matrix** (led-driver): Built-in Charlieplexed 12×8 red LED matrix for displaying animations, sensor readings, custom graphics, and scrolling text without an external display. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Ftutorials%2Funo-r4-wifi%2Fled-matrix%2F&ref=openhardware.directory&product=arduino-uno-r4-wifi&source=md-export)

## Protocols

- **SPI**: SS=D10, MOSI=D11, MISO=D12, SCK=D13
- **I2C**: SDA=A4/SDA, SCL=A5/SCL
- **UART**: RX=D0, TX=D1
- **CAN**: CANRX=D4, CANTX=D5
- **DAC**: DAC0=A0
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX — UART Receive | — | digital-input, digital-output |
| D1 | TX — UART Transmit | — | digital-input, digital-output |
| D2 | Digital I/O | — | digital-input, digital-output |
| D3 | PWM Output | — | digital-input, digital-output, pwm |
| D4 | CAN RX | — | digital-input, digital-output |
| D5 | CAN TX / PWM | — | digital-input, digital-output, pwm |
| D6 | PWM Output | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output |
| D8 | Digital I/O | — | digital-input, digital-output |
| D9 | PWM Output | — | digital-input, digital-output, pwm |
| D10 | SPI SS / PWM | — | digital-input, digital-output, pwm |
| D11 | SPI MOSI / PWM | — | digital-input, digital-output, pwm |
| D12 | SPI MISO | — | digital-input, digital-output |
| D13 | SPI SCK / LED | — | digital-input, digital-output |
| A0 | Analog Input / DAC Output | — | digital-input, digital-output, adc, dac |
| A1 | Analog Input | — | digital-input, digital-output, adc |
| A2 | Analog Input | — | digital-input, digital-output, adc |
| A3 | Analog Input | — | digital-input, digital-output, adc |
| A4 | I2C SDA / Analog Input | — | digital-input, digital-output, adc |
| A5 | I2C SCL / Analog Input | — | digital-input, digital-output, adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Funo-r4-wifi&ref=openhardware.directory&product=arduino-uno-r4-wifi&source=md-export) — $22.00
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Funo-r4-wifi&ref=openhardware.directory&product=arduino-uno-r4-wifi&source=md-export) — €24.40
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FABX00087%2F20371539&ref=openhardware.directory&product=arduino-uno-r4-wifi&source=md-export) — $27.50
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FABX00087&ref=openhardware.directory&product=arduino-uno-r4-wifi&source=md-export) — $27.50
- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FArduino-UNO-WiFi-ABX00087-Bluetooth%2Fdp%2FB0C8V88Z9D&ref=openhardware.directory&product=arduino-uno-r4-wifi&source=md-export) — $27.50
- [SparkFun](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sparkfun.com%2Farduino-uno-r4-wifi.html&ref=openhardware.directory&product=arduino-uno-r4-wifi&source=md-export) — $27.50
- [The Pi Hut (UK)](https://openhardware.directory/r?to=https%3A%2F%2Fthepihut.com%2Fproducts%2Farduino-uno-r4-wifi&ref=openhardware.directory&product=arduino-uno-r4-wifi&source=md-export) — £18.00
- [PiShop US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.pishop.us%2Fproduct%2Farduino-uno-r4-wifi%2F&ref=openhardware.directory&product=arduino-uno-r4-wifi&source=md-export) — $27.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Funo-r4-wifi&ref=openhardware.directory&product=arduino-uno-r4-wifi&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Farduino%2Funo-r4-wifi-usb-bridge&ref=openhardware.directory&product=arduino-uno-r4-wifi&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Funo-r4-wifi%2F&ref=openhardware.directory&product=arduino-uno-r4-wifi&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FABX00087-datasheet.pdf&ref=openhardware.directory&product=arduino-uno-r4-wifi&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fschematics%2FABX00087-schematics.pdf&ref=openhardware.directory&product=arduino-uno-r4-wifi&source=md-export)

## Tags

`arduino`, `uno-r4`, `wifi`, `ble`, `arm-cortex-m4`, `renesas`, `esp32-s3`, `iot`, `led-matrix`, `can-bus`, `dac`, `usb-c`, `qwiic`

---
[View full device page](https://openhardware.directory/s/1370/arduino-uno-r4-wifi)

---

# Arduino Nano RP2040 Connect

> Nano form factor board with RP2040 dual-core Cortex-M0+ at 133MHz, 16MB flash, 264KB SRAM, WiFi 802.11 b/g/n and BLE via u-blox NINA-W102, built-in 6-axis IMU and microphone, 22 digital I/O with 20 PWM channels.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$21.7
- **CPU:** ARM Cortex-M0,dual-core @ 133MHz
- **RAM:** 264KB SRAM
- **Flash:** 16MB
- **USB:** Micro-USB
- **Power:** 5V via Micro-USB or Vin
- **Dimensions:** 45 × 18mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 4.2, BLE

## Compatible Firmware

- arduino
- micropython

## Components

- **RP2040** (mcu): Raspberry Pi RP2040 dual-core ARM Cortex-M0+ at 133MHz with 264KB SRAM and programmable PIO state machines. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=arduino-nano-rp2040-connect&source=md-export)
- **u-blox-NINA-W102** (mcu): u-blox NINA-W102 module providing WiFi 802.11 b/g/n and Bluetooth 4.2 connectivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.u-blox.com%2Fen%2Fproduct%2Fnina-w10-series&ref=openhardware.directory&product=arduino-nano-rp2040-connect&source=md-export)
- **LSM6DSOX** (accelerometer): STMicroelectronics LSM6DSOX 6-axis IMU with machine learning core for gesture and motion detection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flsm6dsox.pdf&ref=openhardware.directory&product=arduino-nano-rp2040-connect&source=md-export)
- **MP34DT05** (microphone): STMicroelectronics MP34DT05 omnidirectional MEMS microphone with PDM output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fmp34dt05-a.pdf&ref=openhardware.directory&product=arduino-nano-rp2040-connect&source=md-export)

## Protocols

- **SPI**: MOSI=D11, MISO=D12, SCK=D13
- **I2C**: SDA=A4, SCL=A5
- **UART**: TX=D1, RX=D0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX | — | digital-input, digital-output, pwm |
| D1 | UART TX | — | digital-input, digital-output, pwm |
| D2 | Digital I/O | — | digital-input, digital-output, pwm |
| D3 | Digital I/O | — | digital-input, digital-output, pwm |
| D4 | Digital I/O | — | digital-input, digital-output, pwm |
| D5 | Digital I/O | — | digital-input, digital-output, pwm |
| D6 | Digital I/O | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output, pwm |
| D8 | Digital I/O | — | digital-input, digital-output, pwm |
| D9 | Digital I/O | — | digital-input, digital-output, pwm |
| D10 | Digital I/O | — | digital-input, digital-output, pwm |
| D11 | SPI MOSI | — | digital-input, digital-output, pwm |
| D12 | SPI MISO | — | digital-input, digital-output, pwm |
| D13 | SPI SCK | — | digital-input, digital-output, pwm |
| D14 | Digital I/O | — | digital-input, digital-output, pwm |
| D15 | Digital I/O | — | digital-input, digital-output, pwm |
| D16 | Digital I/O | — | digital-input, digital-output, pwm |
| D17 | Digital I/O | — | digital-input, digital-output, pwm |
| D18 | Digital I/O | — | digital-input, digital-output, pwm |
| D19 | Digital I/O | — | digital-input, digital-output, pwm |
| A0 | Analog Input | — | digital-input, digital-output, adc, pwm |
| A1 | Analog Input | — | digital-input, digital-output, adc, pwm |
| A2 | Analog Input | — | digital-input, digital-output, adc, pwm |
| A3 | Analog Input | — | digital-input, digital-output, adc, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Farduino-nano-rp2040-connect&ref=openhardware.directory&product=arduino-nano-rp2040-connect&source=md-export) — $21.70
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Farduino-nano-rp2040-connect&ref=openhardware.directory&product=arduino-nano-rp2040-connect&source=md-export) — €23.90
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FABX00052%2F14828735&ref=openhardware.directory&product=arduino-nano-rp2040-connect&source=md-export) — $25.50
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FABX00052&ref=openhardware.directory&product=arduino-nano-rp2040-connect&source=md-export) — $25.50
- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB095J4Y7LG&ref=openhardware.directory&product=arduino-nano-rp2040-connect&source=md-export) — $25.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Farduino-nano-rp2040-connect&ref=openhardware.directory&product=arduino-nano-rp2040-connect&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fnano-rp2040-connect%2F&ref=openhardware.directory&product=arduino-nano-rp2040-connect&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FABX00052-datasheet.pdf&ref=openhardware.directory&product=arduino-nano-rp2040-connect&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fschematics%2FABX00052-schematics.pdf&ref=openhardware.directory&product=arduino-nano-rp2040-connect&source=md-export)

## Tags

`arduino`, `nano`, `rp2040`, `wifi`, `ble`, `imu`, `microphone`

---
[View full device page](https://openhardware.directory/s/1370/arduino-nano-rp2040-connect)

---

# Arduino Nicla Voice

> Tiny 22.86mm AI voice module with nRF52840 BLE 5.0, Syntiant NDP120 neural decision processor, MEMS microphone, 6-axis IMU, and magnetometer — runs always-on voice recognition and audio anomaly detection at ultra-low power.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** module
- **Price:** ~$50
- **CPU:** ARM Cortex-M4F @ 64MHz,Syntiant NDP120
- **RAM:** 256KB SRAM
- **Flash:** 1MB
- **USB:** Micro-USB
- **Power:** 3.3V via Micro-USB or battery
- **Dimensions:** 22.86 × 22.86mm

## Connectivity

Bluetooth BLE 5.0

## Compatible Firmware

- arduino

## Components

- **nRF52840** (mcu): Nordic nRF52840 at 64MHz with BLE 5.0 for application logic and wireless communication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52840_PS_v1.1.pdf&ref=openhardware.directory&product=arduino-nicla-voice&source=md-export)
- **NDP120** (mcu): Syntiant NDP120 ultra-low-power neural processor for always-on voice recognition, keyword spotting, and audio event classification. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.syntiant.com%2Fndp120&ref=openhardware.directory&product=arduino-nicla-voice&source=md-export)
- **BMI270** (accelerometer): Bosch BMI270 6-axis IMU with accelerometer and gyroscope. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bmi270-ds000.pdf&ref=openhardware.directory&product=arduino-nicla-voice&source=md-export)
- **MP34DT06JTR** (microphone): STMicroelectronics MP34DT06JTR omnidirectional MEMS microphone with PDM output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fmp34dt06j.pdf&ref=openhardware.directory&product=arduino-nicla-voice&source=md-export)

## Protocols

- **SPI**: notes=Via castellated pads
- **I2C**: notes=Via castellated pads

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Digital I/O | — | digital-input, digital-output |
| GPIO1 | Digital I/O | — | digital-input, digital-output |
| GPIO2 | Digital I/O | — | digital-input, digital-output |
| GPIO3 | Digital I/O | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fnicla-voice&ref=openhardware.directory&product=arduino-nicla-voice&source=md-export) — $50.00
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnicla-voice&ref=openhardware.directory&product=arduino-nicla-voice&source=md-export) — €55.30
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FABX00061%2F18075935&ref=openhardware.directory&product=arduino-nicla-voice&source=md-export) — $55.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FABX00061&ref=openhardware.directory&product=arduino-nicla-voice&source=md-export) — $55.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnicla-voice&ref=openhardware.directory&product=arduino-nicla-voice&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fnicla-voice%2F&ref=openhardware.directory&product=arduino-nicla-voice&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FABX00061-datasheet.pdf&ref=openhardware.directory&product=arduino-nicla-voice&source=md-export)

## Tags

`arduino`, `nicla`, `ai`, `voice`, `nrf52840`, `ble`, `tinyml`, `microphone`

---
[View full device page](https://openhardware.directory/s/1370/arduino-nicla-voice)

---

# LILYGO T-01C3

> LILYGO T-01C3 is an ultra-compact ESP32-C3 RISC-V module with Wi-Fi and BLE 5.0, available with or without pre-soldered pins, featuring 5.33µA deep sleep current.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-C3
- **Price:** ~$3.99
- **CPU:** ESP32-C3
- **RAM:** 400KB SRAM
- **Flash:** 4MB
- **Power:** 3.3V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- esphome

## Components

- **ESP32-C3** (mcu): 32-bit RISC-V single-core processor at 160MHz with Wi-Fi 802.11 b/g/n, Bluetooth 5.0 BLE, 400KB SRAM, 4MB flash, and 5.33µA deep sleep current. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-01c3&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **PWM**
- **ADC**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-01c3&ref=openhardware.directory&product=lilygo-t-01c3&source=md-export) — $3.99

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-01c3&ref=openhardware.directory&product=lilygo-t-01c3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-01C3&ref=openhardware.directory&product=lilygo-t-01c3&source=md-export)

## Tags

`esp32-c3`, `risc-v`, `wifi`, `bluetooth`, `ultra-compact`, `low-power`, `lilygo`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-01c3)

---

# WiFi Devboard for Flipper Zero

> ESP32-S2-based WiFi development board for Flipper Zero enabling wireless firmware updates, Black Magic Probe debugging over USB and WiFi, and WiFi pentesting with PMKID capture and deauth capabilities.

## Quick Facts

- **Brand:** Flipper Devices
- **Board Type:** ESP32-S2
- **Price:** ~$35
- **CPU:** Xtensa LX7 single-core @ 240MHz, HW crypto (AES/SHA/RSA)
- **RAM:** 320KB SRAM
- **Flash:** 4MB
- **GPIO:** 8 pins
- **USB:** USB-C
- **Power:** 5V via USB-C or Flipper Zero GPIO

## Connectivity

WiFi 802.11 b/g/n | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- black-magic-probe
- esp32-marauder
- esp-idf

## Components

- **ESP32-S2** (mcu): Espressif ESP32-S2 single-core Xtensa LX7 WiFi microcontroller with USB OTG and hardware cryptographic acceleration. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=flipper-zero-wifi-devboard&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **JTAG**
- **SWD**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** GPL-3.0

## Where to Buy

- [Flipper Store](https://openhardware.directory/r?to=https%3A%2F%2Fflipper.net%2Fproducts%2Fwifi-devboard&ref=openhardware.directory&product=flipper-zero-wifi-devboard&source=md-export) — $35.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fflipper.net%2Fproducts%2Fwifi-devboard&ref=openhardware.directory&product=flipper-zero-wifi-devboard&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fflipperdevices&ref=openhardware.directory&product=flipper-zero-wifi-devboard&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fflipperdevices%2Fflipperzero-wifi-devboard&ref=openhardware.directory&product=flipper-zero-wifi-devboard&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=flipper-zero-wifi-devboard&source=md-export)

## Tags

`esp32-s2`, `flipper-zero`, `wifi`, `pentesting`, `debugger`, `black-magic-probe`, `security-research`, `open-source`, `wireless-debugging`, `marauder`

---
[View full device page](https://openhardware.directory/s/1370/flipper-zero-wifi-devboard)

---

# DFRobot FireBeetle 2 ESP32-E

> Compact ESP32-E IoT microcontroller with WiFi 802.11 b/g/n, Bluetooth 4.2, 18 digital I/O, 11 analog inputs, 7 touch pins, 2 DACs, onboard WS2812 RGB LED, GDI display interface, and lithium battery charging in a tiny 25.4x60mm form factor.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** dev-board
- **Price:** ~$8.9
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V + LiPo
- **Dimensions:** 25.4 x 60mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Components

- **ESP32-WROOM-32E** (mcu): Espressif ESP32-WROOM-32E with Xtensa LX6 dual-core at 240MHz, 520KB SRAM, 4MB flash, WiFi 802.11 b/g/n, Bluetooth 4.2 BR/EDR + BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32e_esp32-wroom-32ue_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-e&source=md-export)
- **WS2812B** (led-driver): WS2812 individually addressable RGB LED on GPIO5 for status indication and visual feedback. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-e&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | D5 | — | digital-input, digital-output, adc, pwm |
| GPIO1 | UART0 TX | — | digital-input, digital-output |
| GPIO2 | D9 / Onboard LED | — | digital-input, digital-output, adc, pwm |
| GPIO3 | UART0 RX | — | digital-input, digital-output |
| GPIO4 | D12 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO5 | D8 / WS2812 RGB LED | — | digital-input, digital-output, pwm |
| GPIO12 | D13 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO13 | D7 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO14 | D6 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO15 | A4 | — | digital-input, digital-output, adc, touch, pwm |
| GPIO16 | D11 | — | digital-input, digital-output, pwm |
| GPIO17 | D10 | — | digital-input, digital-output, pwm |
| GPIO18 | SPI SCK | — | digital-input, digital-output, pwm |
| GPIO19 | SPI MISO | — | digital-input, digital-output, pwm |
| GPIO21 | I2C SDA | — | digital-input, digital-output, pwm |
| GPIO22 | I2C SCL | — | digital-input, digital-output, pwm |
| GPIO23 | SPI MOSI | — | digital-input, digital-output, pwm |
| GPIO25 | D2 / DAC1 | — | digital-input, digital-output, adc, dac, pwm |
| GPIO26 | D3 / DAC2 | — | digital-input, digital-output, adc, dac, pwm |
| GPIO34 | A2 (input only) | — | digital-input, adc, input-only |
| GPIO35 | A3 (input only) | — | digital-input, adc, input-only |
| GPIO36 | A0 (input only) | — | digital-input, input-only |
| GPIO39 | A1 (input only) | — | digital-input, input-only |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2195.html&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-e&source=md-export) — $8.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2195.html&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-e&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FFireBeetle_Board_ESP32_E_SKU_DFR0654&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-e&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-firebeetle-2-esp32-e)

---

# Radxa Rockpi S

> Tiny Rockchip RK3308 quad-core SBC with up to 512MB DDR3, 8GB eMMC, microSD, 100Mbps Ethernet, USB 2.0, optional WiFi/BT, and USB-C — a miniature Linux board for audio and IoT projects.

## Quick Facts

- **Brand:** Radxa
- **Board Type:** linux-sbc
- **Price:** ~$14.99
- **CPU:** Rockchip RK3308
- **RAM:** 256MB / 512MB DDR3
- **Flash:** 4GB / 8GB eMMC
- **Power:** 5V

## Connectivity

WiFi WiFi 4 (optional variant) | Bluetooth 4.2 (optional variant) | Ethernet 100 Mbps Fast Ethernet

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Frockpi%2Fpis&ref=openhardware.directory&product=radxa-rockpi-s&source=md-export)
- [armbian](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Frockpi-s%2F&ref=openhardware.directory&product=radxa-rockpi-s&source=md-export)

## Tags

`radxa`, `rockpi-s`, `rk3308`, `sbc`, `linux`, `armbian`, `tiny`, `audio`, `iot`, `voice`

---
[View full device page](https://openhardware.directory/s/1370/radxa-rockpi-s)

---

# Raspberry Pi 500

> The Raspberry Pi 500 is an all-in-one desktop computer built into a compact keyboard, packing a quad-core Cortex-A76 at 2.4GHz, 8GB LPDDR4X RAM, 32GB microSD, dual-band WiFi 5, Bluetooth 5.0, and a 40-pin GPIO header into a single plug-and-go device.

## Quick Facts

- **Brand:** Raspberry Pi
- **Board Type:** keyboard-computer
- **Price:** ~$130
- **CPU:** ARM Cortex-A76 quad-core @ 2.4GHz, VideoCore VII GPU
- **RAM:** 8GB LPDDR4X
- **Flash:** 32GB microSD (included)
- **USB:** 2× USB 3.0 + 1× USB 2.0 + USB-C (power)
- **Power:** 5V DC via USB-C

## Connectivity

WiFi 2.4GHz / 5GHz 802.11ac (WiFi 5) | Bluetooth Bluetooth 5.0 / BLE | Ethernet Gigabit Ethernet

## Compatible Firmware

- raspberry-pi-os
- ubuntu

## Components

- **BCM2712** (mcu): Quad-core 64-bit ARM Cortex-A76 at 2.4GHz with VideoCore VII GPU, identical to the standalone Raspberry Pi 5. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frpi5%2Fraspberry-pi-5-product-brief.pdf&ref=openhardware.directory&product=raspberry-pi-500&source=md-export)
- **RP1** (chip): Raspberry Pi's custom RP1 chip handling USB 3.0, WiFi, Ethernet, and general I/O peripherals. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp1%2Frp1-peripherals.pdf&ref=openhardware.directory&product=raspberry-pi-500&source=md-export)

## Protocols

- **I2C**: SDA=GPIO2, SCL=GPIO3
- **SPI**: MOSI=GPIO10, MISO=GPIO9, SCK=GPIO11, CE0=GPIO8, CE1=GPIO7
- **UART**: TX=GPIO14, RX=GPIO15
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| 1 | 3V3 | power | — |
| 2 | 5V | power | — |
| 3 | GPIO2 | gpio | I2C1 SDA |
| 4 | 5V | power | — |
| 5 | GPIO3 | gpio | I2C1 SCL |
| 6 | GND | ground | — |
| 7 | GPIO4 | gpio | GPCLK0 |
| 8 | GPIO14 | gpio | UART0 TX |
| 9 | GND | ground | — |
| 10 | GPIO15 | gpio | UART0 RX |
| 11 | GPIO17 | gpio | — |
| 12 | GPIO18 | gpio | PWM0 |
| 13 | GPIO27 | gpio | — |
| 14 | GND | ground | — |
| 15 | GPIO22 | gpio | — |
| 16 | GPIO23 | gpio | — |
| 17 | 3V3 | power | — |
| 18 | GPIO24 | gpio | — |
| 19 | GPIO10 | gpio | SPI0 MOSI |
| 20 | GND | ground | — |
| 21 | GPIO9 | gpio | SPI0 MISO |
| 22 | GPIO25 | gpio | — |
| 23 | GPIO11 | gpio | SPI0 CLK |
| 24 | GPIO8 | gpio | SPI0 CE0 |
| 25 | GND | ground | — |
| 26 | GPIO7 | gpio | SPI0 CE1 |
| 27 | ID_SD | gpio | I2C0 SDA |
| 28 | ID_SC | gpio | I2C0 SCL |
| 29 | GPIO5 | gpio | — |
| 30 | GND | ground | — |
| 31 | GPIO6 | gpio | — |
| 32 | GPIO12 | gpio | PWM0 |
| 33 | GPIO13 | gpio | PWM1 |
| 34 | GND | ground | — |
| 35 | GPIO19 | gpio | PWM1 |
| 36 | GPIO16 | gpio | — |
| 37 | GPIO26 | gpio | — |
| 38 | GPIO20 | gpio | — |
| 39 | GND | ground | — |
| 40 | GPIO21 | gpio | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6111&ref=openhardware.directory&product=raspberry-pi-500&source=md-export) — $130.00

## Available Software

- [Raspberry Pi OS](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fsoftware%2F&ref=openhardware.directory&product=raspberry-pi-500&source=md-export)
- [Raspberry Pi Imager](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fsoftware%2F&ref=openhardware.directory&product=raspberry-pi-500&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fproducts%2Fraspberry-pi-500%2F&ref=openhardware.directory&product=raspberry-pi-500&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F6416%2FP6416%2BRP-009158-MM-Raspberry-Pi-500-product-brief.pdf&ref=openhardware.directory&product=raspberry-pi-500&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fdocumentation%2Fcomputers%2Fgetting-started.html&ref=openhardware.directory&product=raspberry-pi-500&source=md-export)

## Tags

`raspberry-pi`, `keyboard-computer`, `sbc`, `desktop`, `cortex-a76`, `linux`, `gpio`, `bcm2712`, `4k`

## Certifications

CE, FCC, RoHS

---
[View full device page](https://openhardware.directory/s/1370/raspberry-pi-500)

---

# Arduino Nano 33 BLE Sense Rev2

> Sensor-packed Nano board with nRF52840 ARM Cortex-M4F at 64MHz, BLE 5.0, 9-axis IMU, microphone, temperature, humidity, pressure, light, and gesture sensors — designed for TinyML and edge AI projects in a 45×18mm form factor.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$39.5
- **CPU:** ARM Cortex-M4F @ 64MHz, FPU, DSP
- **RAM:** 256KB SRAM
- **Flash:** 1MB
- **USB:** Micro-USB
- **Power:** 5V via Micro-USB or Vin
- **Dimensions:** 45 × 18mm

## Connectivity

Bluetooth BLE 5.0

## Compatible Firmware

- arduino

## Components

- **nRF52840** (mcu): Nordic nRF52840 at 64MHz with FPU, DSP, 1MB flash, 256KB RAM, and multiprotocol radio supporting BLE 5.0, Thread, and Zigbee. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52840_PS_v1.1.pdf&ref=openhardware.directory&product=arduino-nano-33-ble-sense-rev2&source=md-export)
- **BMI270** (accelerometer): Bosch BMI270 ultra-low-power 6-axis IMU with accelerometer and gyroscope for motion tracking and gesture recognition. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bmi270-ds000.pdf&ref=openhardware.directory&product=arduino-nano-33-ble-sense-rev2&source=md-export)
- **BMM150** (sensor): Bosch BMM150 3-axis geomagnetic sensor for compass heading and magnetic field detection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bmm150-ds001.pdf&ref=openhardware.directory&product=arduino-nano-33-ble-sense-rev2&source=md-export)
- **MP34DT06JTR** (microphone): STMicroelectronics MP34DT06JTR omnidirectional digital MEMS microphone with PDM output for voice and audio capture. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fmp34dt06j.pdf&ref=openhardware.directory&product=arduino-nano-33-ble-sense-rev2&source=md-export)
- **HS3003** (sensor): Renesas HS3003 high-accuracy temperature and humidity sensor with I2C interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.renesas.com%2Fen%2Fdocument%2Fdst%2Fhs300x-datasheet&ref=openhardware.directory&product=arduino-nano-33-ble-sense-rev2&source=md-export)
- **LPS22HB** (sensor): STMicroelectronics LPS22HB MEMS barometric pressure sensor with 24-bit output and I2C/SPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flps22hb.pdf&ref=openhardware.directory&product=arduino-nano-33-ble-sense-rev2&source=md-export)
- **APDS-9960** (sensor): Broadcom APDS-9960 digital proximity, ambient light, RGB color, and gesture sensor with I2C interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.broadcom.com%2Fdoc%2FAV02-4191EN&ref=openhardware.directory&product=arduino-nano-33-ble-sense-rev2&source=md-export)

## Protocols

- **SPI**: MOSI=D11, MISO=D12, SCK=D13
- **I2C**: SDA=A4, SCL=A5
- **UART**: TX=D1, RX=D0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX | — | digital-input, digital-output |
| D1 | UART TX | — | digital-input, digital-output |
| D2 | Digital I/O | — | digital-input, digital-output, pwm |
| D3 | Digital I/O | — | digital-input, digital-output, pwm |
| D4 | Digital I/O | — | digital-input, digital-output, pwm |
| D5 | Digital I/O | — | digital-input, digital-output, pwm |
| D6 | Digital I/O | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output, pwm |
| D8 | Digital I/O | — | digital-input, digital-output, pwm |
| D9 | Digital I/O | — | digital-input, digital-output, pwm |
| D10 | Digital I/O | — | digital-input, digital-output, pwm |
| D11 | SPI MOSI | — | digital-input, digital-output, pwm |
| D12 | SPI MISO | — | digital-input, digital-output, pwm |
| D13 | SPI SCK | — | digital-input, digital-output, pwm |
| A0 | Analog Input | — | digital-input, digital-output, adc |
| A1 | Analog Input | — | digital-input, digital-output, adc |
| A2 | Analog Input | — | digital-input, digital-output, adc |
| A3 | Analog Input | — | digital-input, digital-output, adc |
| A4 | I2C SDA | — | digital-input, digital-output, adc |
| A5 | I2C SCL | — | digital-input, digital-output, adc |
| A6 | Analog Input | — | adc |
| A7 | Analog Input | — | adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fnano-33-ble-sense-rev2&ref=openhardware.directory&product=arduino-nano-33-ble-sense-rev2&source=md-export) — $39.50
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnano-33-ble-sense-rev2&ref=openhardware.directory&product=arduino-nano-33-ble-sense-rev2&source=md-export) — €43.40
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FABX00069%2F18075936&ref=openhardware.directory&product=arduino-nano-33-ble-sense-rev2&source=md-export) — $44.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FABX00069&ref=openhardware.directory&product=arduino-nano-33-ble-sense-rev2&source=md-export) — $44.00
- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB0CHBJNWQY&ref=openhardware.directory&product=arduino-nano-33-ble-sense-rev2&source=md-export) — $44.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnano-33-ble-sense-rev2&ref=openhardware.directory&product=arduino-nano-33-ble-sense-rev2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fnano-33-ble-sense-rev2%2F&ref=openhardware.directory&product=arduino-nano-33-ble-sense-rev2&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FABX00069-datasheet.pdf&ref=openhardware.directory&product=arduino-nano-33-ble-sense-rev2&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fschematics%2FABX00069-schematics.pdf&ref=openhardware.directory&product=arduino-nano-33-ble-sense-rev2&source=md-export)

## Tags

`arduino`, `nano`, `nrf52840`, `ble`, `tinyml`, `imu`, `sensors`, `edge-ai`

---
[View full device page](https://openhardware.directory/s/1370/arduino-nano-33-ble-sense-rev2)

---

# LILYGO T-SIM7000G

> ESP32 board with SIMCom SIM7000G multi-band LTE-M/NB-IoT modem, GPS, 8MB PSRAM, USB-C, and 18650 battery support — designed for global cellular IoT deployments.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$35.14
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C 2.0
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- esphome
- platformio

## Components

- **ESP32-D0WDQ6** (mcu): Espressif ESP32-D0WDQ6 dual-core Xtensa LX6 at 240MHz with WiFi and Bluetooth 4.2/BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-sim7000g&source=md-export)
- **SIM7000G** (cellular-modem): SIMCom SIM7000G multi-band modem supporting LTE-M, NB-IoT, and GPRS across global bands, with integrated GNSS for location tracking. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsimcom.ee%2Fdocuments%2FSIM7000x%2FSIM7000%2520Series_AT%2520Command%2520Manual_V1.06.pdf&ref=openhardware.directory&product=lilygo-t-sim7000g&source=md-export)
- **CH9102** (usb-uart): WCH CH9102 USB-to-UART converter for programming and serial debug over USB-C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fdownloads%2FCH9102DS1_PDF.html&ref=openhardware.directory&product=lilygo-t-sim7000g&source=md-export)

## Protocols

- **UART**: TX=GPIO1, RX=GPIO3
- **SPI**: MOSI=GPIO15, MISO=GPIO2, CLK=GPIO14, CS=GPIO13
- **I2C**: SDA=GPIO21, SCL=GPIO22

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot / Free GPIO | — | digital-input, strapping |
| GPIO2 | SD MISO | — | digital-input |
| GPIO4 | SIM7000G Power | — | digital-output |
| GPIO12 | SIM7000G Reset | — | digital-output |
| GPIO13 | SD CS | — | digital-output |
| GPIO14 | SD CLK | — | digital-output |
| GPIO15 | SD MOSI | — | digital-output |
| GPIO19 | SIM7000G RX | — | digital-input |
| GPIO26 | SIM7000G TX | — | digital-output |
| GPIO27 | Free GPIO | — | digital-input, digital-output, adc, pwm |
| GPIO32 | Free GPIO | — | digital-input, digital-output, adc, pwm, rtc |
| GPIO33 | Free GPIO | — | digital-input, digital-output, adc, pwm, rtc |
| GPIO34 | Battery Voltage ADC | — | digital-input, adc, input-only |
| GPIO35 | Free ADC Input | — | digital-input, adc, input-only |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-sim7000g&ref=openhardware.directory&product=lilygo-t-sim7000g&source=md-export) — $35.14

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-sim7000g&ref=openhardware.directory&product=lilygo-t-sim7000g&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-Modem-Series&ref=openhardware.directory&product=lilygo-t-sim7000g&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-sim7000g&source=md-export)

## Tags

`esp32`, `sim7000g`, `lte-m`, `nb-iot`, `gps`, `cellular`, `lilygo`, `18650`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-sim7000g)

---

# LILYGO T-Energy S3

> Affordable ESP32-S3 development board with 16MB flash, 8MB PSRAM, integrated 18650 battery holder, WiFi, and BLE 5.0 for battery-powered IoT sensor nodes under $10.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$9.7
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + Li-Ion 18650

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- esp-idf
- esphome

## Components

- **ESP32-S3** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi 802.11 b/g/n, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-energy-s3&source=md-export)

## Protocols

- **SPI**: CLK=GPIO12, MOSI=GPIO11, MISO=GPIO13
- **I2C**: SDA=GPIO8, SCL=GPIO9
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO8 | I2C SDA | — | digital-input, digital-output |
| GPIO9 | I2C SCL | — | digital-input, digital-output |
| GPIO43 | UART TX | — | digital-output |
| GPIO44 | UART RX | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-energy-s3&ref=openhardware.directory&product=lilygo-t-energy-s3&source=md-export) — $9.70

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-energy-s3&ref=openhardware.directory&product=lilygo-t-energy-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Energy-S3&ref=openhardware.directory&product=lilygo-t-energy-s3&source=md-export)

## Tags

`esp32-s3`, `18650`, `battery`, `affordable`, `esphome`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-energy-s3)

---

# LILYGO T-SIM7070G

> ESP32-WROVER-E development board with SIM7070G NB-IoT/LTE-M/GPRS modem, GPS, Wi-Fi, Bluetooth 4.2, MicroSD, and solar charging input for ultra-low-power IoT applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$26.59
- **CPU:** ESP32-WROVER-E
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C (CH9102)
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-WROVER-E** (mcu): Dual-core 240 MHz Xtensa LX6 MCU with 8 MB PSRAM and 4 MB flash, integrated Wi-Fi and Bluetooth 4.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-sim7070g&source=md-export)
- **SIM7070G** (cellular-modem): SIMCOM SIM7070G multi-band NB-IoT / Cat-M1 / GPRS / EDGE modem with integrated GNSS (GPS, GLONASS, BeiDou) support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsimcom.ee%2Fdocuments%2FSIM7070G%2FSIM7080G_Hardware_Design_V1.02.pdf&ref=openhardware.directory&product=lilygo-t-sim7070g&source=md-export)
- **CH9102** (usb-bridge): WCH CH9102 USB-to-TTL serial converter enabling USB programming and debugging. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH9102.html&ref=openhardware.directory&product=lilygo-t-sim7070g&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **SDIO**
- **I2S**
- **CAN**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official Store](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-sim7070g&ref=openhardware.directory&product=lilygo-t-sim7070g&source=md-export) — $26.59

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-sim7070g&ref=openhardware.directory&product=lilygo-t-sim7070g&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-Modem-Series&ref=openhardware.directory&product=lilygo-t-sim7070g&source=md-export)

## Tags

`esp32`, `nb-iot`, `lte-m`, `cellular`, `gps`, `iot`, `solar`, `lilygo`, `sim7070g`, `lpwa`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-sim7070g)

---

# LILYGO T-SIM7600E

> ESP32-based development board with SIM7600E-H 4G LTE Cat-4 modem, GPS, Wi-Fi, Bluetooth, 18650 battery holder with solar charging, and dual USB-C ports for high-speed IoT connectivity.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$49.78
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C (dual)
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32** (mcu): Dual-core 240 MHz Xtensa LX6 MCU with 4 MB flash, 8 MB PSRAM, integrated Wi-Fi 802.11 b/g/n and Bluetooth 4.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-sim7600e&source=md-export)
- **SIM7600E-H** (cellular-modem): SIMCOM SIM7600E-H multi-band LTE Cat-4 modem with integrated GPS/GNSS, delivering 150 Mbps downlink and 50 Mbps uplink. Supports Europe LTE-FDD bands. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsimcom.ee%2Fdocuments%2FSIM7600E%2FSIM7600E_Hardware_Design_V1.06.pdf&ref=openhardware.directory&product=lilygo-t-sim7600e&source=md-export)
- **CH9102** (usb-bridge): WCH CH9102 USB-to-TTL serial converter for USB programming and debugging. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH9102.html&ref=openhardware.directory&product=lilygo-t-sim7600e&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **SDIO**
- **I2S**
- **CAN**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official Store](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-sim7600&ref=openhardware.directory&product=lilygo-t-sim7600e&source=md-export) — $49.78

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-sim7600&ref=openhardware.directory&product=lilygo-t-sim7600e&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-Modem-Series&ref=openhardware.directory&product=lilygo-t-sim7600e&source=md-export)

## Tags

`esp32`, `4g`, `lte`, `sim7600`, `cellular`, `gps`, `iot`, `lilygo`, `solar`, `18650`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-sim7600e)

---

# LILYGO T-SIM A7670E

> ESP32-WROVER-E development board with A7670E LTE Cat-1 modem supporting voice calls, SMS, and GPS positioning. Available with multiple regional frequency variants for global 4G deployments.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$29.98
- **CPU:** ESP32-WROVER-E
- **RAM:** 520 KB
- **Flash:** 4MB
- **USB:** USB-C (CH9102)
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-WROVER-E** (mcu): Dual-core 240 MHz Xtensa LX6 MCU with 4 MB flash and 8 MB PSRAM, integrated Wi-Fi 802.11 b/g/n and Bluetooth 4.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-sim-a7670e&source=md-export)
- **A7670E** (cellular-modem): SIMCOM A7670E LTE Cat-1 modem supporting voice calls, SMS, and data over LTE-FDD B1/B3/B5/B7/B8/B20 and GSM 900/1800 MHz. Optional GNSS (GPS/GLONASS/BeiDou) positioning. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ai-thinker.com%2Fpro_view-58.html&ref=openhardware.directory&product=lilygo-t-sim-a7670e&source=md-export)
- **CH9102** (usb-bridge): WCH CH9102 USB-to-TTL serial converter for USB programming and debugging. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH9102.html&ref=openhardware.directory&product=lilygo-t-sim-a7670e&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **SDIO**
- **I2S**
- **CAN**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official Store](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-sim-a7670e&ref=openhardware.directory&product=lilygo-t-sim-a7670e&source=md-export) — $29.98

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-sim-a7670e&ref=openhardware.directory&product=lilygo-t-sim-a7670e&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-Modem-Series&ref=openhardware.directory&product=lilygo-t-sim-a7670e&source=md-export)

## Tags

`esp32`, `4g`, `lte`, `a7670e`, `cellular`, `gps`, `iot`, `lilygo`, `voice`, `sms`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-sim-a7670e)

---

# LILYGO T-SIM7670G S3

> ESP32-S3-based development board with SIM7670G LTE Cat-1 modem, integrated GPS, Wi-Fi, Bluetooth 5, MicroSD, solar charging input, and 16 MB flash for high-performance IoT and asset tracking applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$36.77
- **CPU:** ESP32-S3-WROOM-1
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C (native USB CDC)
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3-WROOM-1** (mcu): Dual-core 240 MHz Xtensa LX7 MCU with 16 MB flash, 8 MB OPI PSRAM, native USB CDC, Wi-Fi 802.11 b/g/n, and Bluetooth 5 LE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-sim-7670g-s3&source=md-export)
- **SIM7670G** (cellular-modem): SIMCOM SIM7670G LTE Cat-1 modem with integrated multi-constellation GNSS (GPS/GLONASS/BeiDou/Galileo) supporting global frequency bands. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsimcom.ee%2Fdocuments%2FSIM7670G%2FSIM7670G_Hardware_Design_V1.03.pdf&ref=openhardware.directory&product=lilygo-t-sim-7670g-s3&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **SDIO**
- **USB CDC**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official Store](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-sim-7670g-s3&ref=openhardware.directory&product=lilygo-t-sim-7670g-s3&source=md-export) — $36.77

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-sim-7670g-s3&ref=openhardware.directory&product=lilygo-t-sim-7670g-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-Modem-Series&ref=openhardware.directory&product=lilygo-t-sim-7670g-s3&source=md-export)

## Tags

`esp32-s3`, `4g`, `lte`, `sim7670g`, `cellular`, `gps`, `iot`, `lilygo`, `solar`, `s3`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-sim-7670g-s3)

---

# LILYGO T7 V1.3 Mini32 ESP32

> Compact ESP32 development board (Mini32 form factor) with 4MB Flash, WiFi 802.11 b/g/n, Bluetooth 4.2, CH340C USB-to-serial, TP4054 LiPo charger, and 1.25mm JST battery connector — a classic breadboard-compatible IoT dev board.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$5.99
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** Micro-USB (CH340C)
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- platformio
- esphome

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 processor with 520KB SRAM, WiFi, and Bluetooth 4.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t7-v1-3-mini-32-esp32&source=md-export)
- **CH340C** (usb-serial): USB to UART bridge for programming and serial communication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fdownloads%2FCH340DS1_PDF.html&ref=openhardware.directory&product=lilygo-t7-v1-3-mini-32-esp32&source=md-export)
- **TP4054** (battery-charger): Single-cell lithium battery charger connected via 1.25mm JST 2-pin connector. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Fszlcsc%2FTP4054_C16680.pdf&ref=openhardware.directory&product=lilygo-t7-v1-3-mini-32-esp32&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **I2S**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft7-v1-3-mini-32-esp32&ref=openhardware.directory&product=lilygo-t7-v1-3-mini-32-esp32&source=md-export) — $5.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft7-v1-3-mini-32-esp32&ref=openhardware.directory&product=lilygo-t7-v1-3-mini-32-esp32&source=md-export)

## Tags

`esp32`, `mini32`, `development-board`, `iot`, `arduino`, `micropython`, `wifi`, `bluetooth`, `lipo-charger`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t7-v1-3-mini-32-esp32)

---

# LILYGO T7 Mini32 V1.5

> Updated ESP32 Mini32 development board with 8MB PSRAM, 4/16MB Flash options, dual-core 240MHz, CH9102 USB-serial, WiFi, BLE 4.2, and 1.25mm JST LiPo connector in a 40×31mm breadboard-friendly footprint.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$7.44
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 4MB/16MB
- **USB:** Micro-USB (CH9102)
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- platformio
- esphome

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 at 240MHz with 520KB SRAM, WiFi, and Bluetooth 4.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t7-mini32-v1-5&source=md-export)
- **CH9102** (usb-serial): CH9102 USB to UART bridge for flashing and serial communication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH9102.html&ref=openhardware.directory&product=lilygo-t7-mini32-v1-5&source=md-export)
- **LiPo Charger** (battery-charger): Onboard LiPo battery charger via 1.25mm JST 2-pin connector for single-cell batteries. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Fszlcsc%2FTP4054_C16680.pdf&ref=openhardware.directory&product=lilygo-t7-mini32-v1-5&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **I2S**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft7-mini32-v1-5&ref=openhardware.directory&product=lilygo-t7-mini32-v1-5&source=md-export) — $7.44

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft7-mini32-v1-5&ref=openhardware.directory&product=lilygo-t7-mini32-v1-5&source=md-export)

## Tags

`esp32`, `mini32`, `psram`, `development-board`, `iot`, `arduino`, `micropython`, `wifi`, `bluetooth`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t7-mini32-v1-5)

---

# LILYGO T-Beam 1W

> LILYGO T-Beam 1W is an ESP32-S3 LoRa development board featuring a 1-watt LoRa power amplifier for significantly extended transmission range, with GPS support, AXP2101 PMU, and 18650 battery compatibility.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$47.32
- **CPU:** ESP32-S3FN8 (ESP32-53FN8)
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + Li-Ion 18650

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- meshtastic

## Components

- **ESP32-S3FN8** (mcu): ESP32-S3 dual-core LX7 microprocessor with 16MB flash, 8MB PSRAM, Wi-Fi, and Bluetooth 5 LE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-beam-1w&source=md-export)
- **SX1262** (radio): Semtech SX1262 sub-GHz LoRa transceiver with integrated 1-watt power amplifier for maximum transmission range — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-beam-1w&source=md-export)
- **AXP2101** (pmu): AXP2101 PMU for 18650 battery charging, power regulation, and power management across the board — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.x-powers.com%2Fen.php%2FInfo%2Fproduct_detail%2Farticle_id%2F95&ref=openhardware.directory&product=lilygo-t-beam-1w&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **GPIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-beam-1w&ref=openhardware.directory&product=lilygo-t-beam-1w&source=md-export) — $47.32

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-beam-1w&ref=openhardware.directory&product=lilygo-t-beam-1w&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-LoRa-Series&ref=openhardware.directory&product=lilygo-t-beam-1w&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-LoRa-Series%2Fblob%2Fmaster%2Fdocs%2Fen%2Ft_beam_1w%2Ft_beam_1w_hw.md&ref=openhardware.directory&product=lilygo-t-beam-1w&source=md-export)

## Tags

`esp32-s3`, `lora`, `1-watt`, `high-power`, `meshtastic`, `t-beam`, `long-range`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-beam-1w)

---

# LILYGO T-Encoder ESP32

> Compact ESP32-PICO-V3-02 board with rotary encoder, WS2812 RGB LED ring, Wi-Fi, BLE 4.2, 8MB flash, and 2MB PSRAM. Ideal for knob-based UI controllers and volume/parameter controls.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$10.25
- **CPU:** ESP32-PICO-V3-02
- **Flash:** 8MB
- **Power:** 3.3V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf
- platformio

## Components

- **ESP32-PICO-V3-02** (mcu): ESP32 System-in-Package with 8MB flash, 2MB PSRAM, Wi-Fi b/g/n and BLE 4.2 in compact form — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-encoder-esp32&source=md-export)
- **WS2812B** (led): Addressable RGB LED ring controlled via IO25; provides visual feedback for encoder position — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812.pdf&ref=openhardware.directory&product=lilygo-t-encoder-esp32&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-encoder-esp32&ref=openhardware.directory&product=lilygo-t-encoder-esp32&source=md-export) — $10.25

## Available Software

- [Arduino IDE](https://openhardware.directory/r?to=https%3A%2F%2Fwww.arduino.cc%2F&ref=openhardware.directory&product=lilygo-t-encoder-esp32&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-encoder-esp32&ref=openhardware.directory&product=lilygo-t-encoder-esp32&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Encoder&ref=openhardware.directory&product=lilygo-t-encoder-esp32&source=md-export)

## Tags

`esp32`, `encoder`, `rotary`, `rgb-led`, `ws2812`, `controller`, `hid`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-encoder-esp32)

---

# Prokyber AI-on-the-Edge-Cam

> Open-source ESP32-S3 camera board with PoE, microSD, and Stemma QT designed for AI-powered utility meter reading using the AI-on-the-edge-device firmware with TensorFlow Lite inference.

## Quick Facts

- **Brand:** Prokyber
- **Board Type:** dev-board
- **Price:** ~$33
- **CPU:** ESP32-S3-N16R8
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **GPIO:** 6 pins
- **USB:** USB-C
- **Power:** 5V + PoE

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0 | Zigbee false | Ethernet 10/100 Mbps PoE

## Compatible Firmware

- ai-on-the-edge-device
- esphome
- arduino
- platformio

## Components

- **ESP32-S3** (mcu): Espressif ESP32-S3 dual-core Xtensa LX7 SoC at 240MHz with 16MB flash, 8MB PSRAM, WiFi 802.11 b/g/n, BLE 5.0, and AI vector extensions for TensorFlow Lite inference. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=ai-on-the-edge-cam&source=md-export)
- **W5500** (ethernet-phy): Hardwired TCP/IP embedded Ethernet controller with SPI interface supporting 10/100 Mbps, 8 simultaneous sockets, and 32KB internal buffer. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.wiznet.io%2Fimg%2Fproducts%2Fw5500%2FW5500_ds_v110e.pdf&ref=openhardware.directory&product=ai-on-the-edge-cam&source=md-export)
- **SI3404** (poe-controller): IEEE 802.3af/at compliant PoE powered device controller with integrated bridge rectifier driver and DC-DC converter support for up to 25.5W extraction from Ethernet cables. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2Fsi3404-datasheet.pdf&ref=openhardware.directory&product=ai-on-the-edge-cam&source=md-export)
- **OV2640** (camera): 2-megapixel UXGA (1600x1200) CMOS image sensor with built-in JPEG compression engine, DVP parallel interface, and up to 15fps at full resolution. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2FOV2640_DS.pdf&ref=openhardware.directory&product=ai-on-the-edge-cam&source=md-export)
- **WS2812B** (led-driver): Four WorldSemi WS2812B individually addressable RGB LEDs providing configurable illumination for consistent camera image capture in varying lighting conditions. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=ai-on-the-edge-cam&source=md-export)
- **stemma-qt** (connector): JST SH 4-pin I2C connector compatible with Adafruit Stemma QT and SparkFun Qwiic ecosystems for plug-and-play sensor expansion. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fintroducing-adafruit-stemma-qt%2Fwhat-is-stemma-qt&ref=openhardware.directory&product=ai-on-the-edge-cam&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **SDIO**
- **TCP/IP**
- **HTTP**
- **MQTT**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No
- **License:** CERN-OHL-P-2.0

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fallexok%2Fai-on-the-edge-cam-esp32-s3-with-poe-sd-camera%2F&ref=openhardware.directory&product=ai-on-the-edge-cam&source=md-export) — $33.00

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fallexok%2Fai-on-the-edge-cam-esp32-s3-with-poe-sd-camera%2F&ref=openhardware.directory&product=ai-on-the-edge-cam&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fprokyber%2Fai-on-the-edge-cam-hw-description&ref=openhardware.directory&product=ai-on-the-edge-cam&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fprokyber%2Fai-on-the-edge-cam-hw-description%2Fblob%2Fmain%2FSchematic_ai-on-the-edge-cam_2025-08-27.pdf&ref=openhardware.directory&product=ai-on-the-edge-cam&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fjomjol.github.io%2FAI-on-the-edge-device-docs%2F&ref=openhardware.directory&product=ai-on-the-edge-cam&source=md-export)

## Tags

`esp32-s3`, `poe`, `camera`, `ai`, `meter-reading`, `tensorflow-lite`, `open-hardware`, `ov2640`, `w5500`, `stemma-qt`, `ws2812b`, `lorawan`, `cern-ohl-p`

---
[View full device page](https://openhardware.directory/s/1370/ai-on-the-edge-cam)

---

# ESP32-S3 Nano

> Compact ESP32-S3 dev board by Waveshare in Arduino Nano form factor. Features dual-core 240MHz LX7, 16MB flash, 8MB PSRAM, WiFi, BLE 5.0, and USB-C. Drop-in ESP32-S3 upgrade for Nano-sized projects.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$8.99
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **GPIO:** 14 digital + 8 analog pins
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- micropython
- circuitpython

## Components

- **ESP32-S3R8** (MCU): Espressif ESP32-S3R8 SoC with dual-core Xtensa LX7 at 240MHz, integrated WiFi and BLE 5.0, with 8MB PSRAM on-package. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s3-nano&source=md-export)
- **RGB LED** (LED): WS2812-compatible addressable RGB LED for status indication and user feedback. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-S3-Nano&ref=openhardware.directory&product=esp32-s3-nano&source=md-export)
- **Power LED** (LED): Green LED indicating board power status. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-S3-Nano&ref=openhardware.directory&product=esp32-s3-nano&source=md-export)
- **User LED** (LED): General purpose LED connected to a GPIO pin for user applications. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-S3-Nano&ref=openhardware.directory&product=esp32-s3-nano&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fesp32-s3-nano&ref=openhardware.directory&product=esp32-s3-nano&source=md-export) — $9.95
- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-nano.htm&ref=openhardware.directory&product=esp32-s3-nano&source=md-export) — $8.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-nano.htm&ref=openhardware.directory&product=esp32-s3-nano&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-S3-Nano&ref=openhardware.directory&product=esp32-s3-nano&source=md-export)

## Tags

`esp32-s3`, `arduino-nano`, `waveshare`, `dev-board`, `wifi`, `ble`, `usb-c`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/esp32-s3-nano)

---

# FaikOut WiFi Aircon Controller

> Open-source ESP32-S3 WiFi controller for Daikin air conditioners with local-only control via MQTT and Home Assistant. Replaces cloud-dependent Daikin WiFi modules with privacy-first, no-internet-required operation.

## Quick Facts

- **Brand:** Andrews & Arnold
- **Board Type:** IoT Controller
- **Price:** ~$42
- **CPU:** ESP32-S3-PICO-1 Xtensa LX7 dual-core @ 240MHz
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **USB:** USB-C (via test pads)
- **Power:** 5V
- **Dimensions:** 45 x 36 mm (snap-off panel: 70 x 70 mm)

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- Faikin
- esp-idf

## Components

- **ESP32-S3-PICO-1** (mcu): Espressif ESP32-S3-PICO-1 system-in-package with dual-core Xtensa LX7 at 240MHz, integrated 8MB flash, WiFi 802.11 b/g/n, and Bluetooth LE 5.0 in a compact 7x7mm LGA package. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-pico-1_pico-1-u_datasheet_en.pdf&ref=openhardware.directory&product=faikout-wifi-aircon-controller&source=md-export)

## Protocols

- **MQTT**
- **UART**
- **Daikin S21**
- **HTTP**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** GPL-3.0

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Frevk%2Ffaikout-alternative-wifi-air-con-controller%2F&ref=openhardware.directory&product=faikout-wifi-aircon-controller&source=md-export) — $42.00

## Available Software

- [Faikin Firmware](https://openhardware.directory/r?to=https%3A%2F%2Fcodeberg.org%2FRevK%2FESP32-Faikout&ref=openhardware.directory&product=faikout-wifi-aircon-controller&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Frevk%2Ffaikout-alternative-wifi-air-con-controller%2F&ref=openhardware.directory&product=faikout-wifi-aircon-controller&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Frevk%2FESP32-Faikin&ref=openhardware.directory&product=faikout-wifi-aircon-controller&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fcodeberg.org%2FRevK%2FESP32-Faikout%2Fwiki&ref=openhardware.directory&product=faikout-wifi-aircon-controller&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcodeberg.org%2FRevK%2FESP32-Faikout%2Fsrc%2Fbranch%2Fmain%2FKiCad&ref=openhardware.directory&product=faikout-wifi-aircon-controller&source=md-export)

## Tags

`daikin`, `hvac`, `mqtt`, `home-assistant`, `wifi-controller`, `aircon`, `local-control`, `esp32-s3`, `open-source`, `ble-sensor`, `s21-protocol`, `climate-control`

---
[View full device page](https://openhardware.directory/s/1370/faikout-wifi-aircon-controller)

---

# 0.91" OLED I2C Display (128x32)

> Compact 0.91-inch monochrome OLED display module with 128x32 pixel resolution and SSD1306 driver. Communicates over I2C interface, ideal for small status readouts and embedded projects.

## Quick Facts

- **Brand:** OpenELAB
- **Board Type:** display-module
- **Price:** ~$5.99
- **CPU:** None (passive display module)
- **RAM:** None
- **Flash:** none
- **Power:** 3.3V-5V via header pins

## Components

- **SSD1306** (display-driver): 128x64/128x32 monochrome OLED driver with I2C and SPI interface, built-in charge pump, and 1KB GDDRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=oled-091-inch-i2c-display&source=md-export)

## Protocols

- **I2C**

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2F091incholedi2cdisplay&ref=openhardware.directory&product=oled-091-inch-i2c-display&source=md-export) — $5.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2F091incholedi2cdisplay&ref=openhardware.directory&product=oled-091-inch-i2c-display&source=md-export)

## Tags

`oled`, `display`, `i2c`, `ssd1306`, `128x32`, `monochrome`

---
[View full device page](https://openhardware.directory/s/1370/oled-091-inch-i2c-display)

---

# Pine64 PineTime

> Open-source smartwatch built on the Nordic nRF52832 SoC with 1.3-inch IPS touchscreen, heart rate sensor, accelerometer, and week-long battery life. Runs InfiniTime, Wasp-OS, or Zephyr firmware. Priced from $27.

## Quick Facts

- **Brand:** Pine64
- **Board Type:** nRF52832
- **Price:** ~$26.99
- **CPU:** ARM Cortex-M4F @ 64MHz, FPU, DSP, AES-128 hardware
- **RAM:** 64 KB SRAM
- **Flash:** 512 KB + 4 MB external SPI
- **USB:** 2-pin magnetic dock
- **Power:** 180 mAh LiPo battery, magnetic charging dock
- **Dimensions:** 37.5 × 40 × 11 mm

## Connectivity

Bluetooth Bluetooth 5.0 BLE

## Compatible Firmware

- InfiniTime
- Wasp-OS
- Zephyr RTOS
- RIOT OS

## Components

- **Nordic nRF52832** (MCU): ARM Cortex-M4F @ 64MHz with 64KB RAM, 512KB flash, BLE 5.0, AES-128 hardware crypto, NFC-A tag support, and 1.2µA deep sleep — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Fdatasheet%2Fpinetime%2FnRF52832%2520product%2520brief.pdf&ref=openhardware.directory&product=pine64-pinetime&source=md-export)
- **ST7789V** (Display): Sitronix display controller driving 1.3-inch 240×240 IPS panel with 65K colors via 4-wire SPI interface, readable in direct sunlight — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.pine64.org%2Fimages%2F5%2F54%2FST7789V_v1.6.pdf&ref=openhardware.directory&product=pine64-pinetime&source=md-export)
- **CST816S** (Touch Controller): Hynitron single-point capacitive touch controller with gesture recognition, I2C interface at up to 400kHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.pine64.org%2Fimages%2F2%2F2f%2FCST816S.zip&ref=openhardware.directory&product=pine64-pinetime&source=md-export)
- **Bosch BMA425** (Accelerometer): Bosch low-power 3-axis accelerometer with built-in step counting, activity recognition, and orientation detection via I2C — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F1912111437_Bosch-Sensortec-BMA425_C437656.pdf&ref=openhardware.directory&product=pine64-pinetime&source=md-export)
- **HRS3300** (Sensor): TianYiHeXin optical heart rate sensor using photoplethysmography (PPG) with I2C interface and low active current (~0.1mA) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Fdatasheet%2Fpinetime%2FHRS3300%2520Heart%2520Rate%2520Sensor.pdf&ref=openhardware.directory&product=pine64-pinetime&source=md-export)
- **XTX XT25F32B** (Storage): 32Mbit SPI NOR flash memory for firmware storage, OTA updates, and resource files, operating at up to 108MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Fszlcsc%2F2005251035_XTX-XT25F32BSOIGU-S_C558851.pdf&ref=openhardware.directory&product=pine64-pinetime&source=md-export)
- **SGM40561** (Battery Charger): SGMicro linear lithium battery charger IC for the internal 180mAh LiPo cell, charged via 2-pin magnetic dock — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Fdatasheet%2Fpinetime%2FSGM40561.pdf&ref=openhardware.directory&product=pine64-pinetime&source=md-export)

## Protocols

- **SPI**: SCK=P0.02, MOSI=P0.03, CS_LCD=P0.25
- **I2C**: SDA=P0.06, SCL=P0.07
- **BLE**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| P0.02 | LCD_SCK | — | — |
| P0.03 | LCD_SDI (MOSI) | — | — |
| P0.06 | I2C SDA (Touch + Accel) | — | — |
| P0.07 | I2C SCL (Touch + Accel) | — | — |
| P0.08 | BMA425 Interrupt | — | — |
| P0.10 | Touchpad Reset | — | — |
| P0.12 | Charge Indication | — | — |
| P0.13 | Button Input | — | — |
| P0.14 | LCD Backlight Low | — | — |
| P0.15 | Button Enable | — | — |
| P0.18 | LCD Data/Command | — | — |
| P0.22 | LCD Backlight Mid | — | — |
| P0.23 | LCD Backlight High | — | — |
| P0.25 | LCD Chip Select | — | — |
| P0.26 | LCD Reset | — | — |
| P0.28 | Touchpad Interrupt | — | — |
| P0.31 | Battery Voltage ADC (AIN7) | — | adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Pine Store](https://openhardware.directory/r?to=https%3A%2F%2Fpine64.com%2Fproduct-category%2Fpinetime%2F&ref=openhardware.directory&product=pine64-pinetime&source=md-export) — $26.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fpine64.org%2Fdevices%2Fpinetime%2F&ref=openhardware.directory&product=pine64-pinetime&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FInfiniTimeOrg%2FInfiniTime&ref=openhardware.directory&product=pine64-pinetime&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.pine64.org%2Fwiki%2FPineTime&ref=openhardware.directory&product=pine64-pinetime&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2FPineTime%2FPineTime%2520Schematic-V1.0a-20191103.pdf&ref=openhardware.directory&product=pine64-pinetime&source=md-export)

## Tags

`smartwatch`, `open-hardware`, `pine64`, `nrf52832`, `wearable`, `bluetooth`, `infinitime`, `zephyr`

## Certifications

FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/pine64-pinetime)

---

# Waveshare Cobra Flex

> All-metal modular drive-by-wire 4WD robot chassis with ESP32-S3 controller, hub motors with built-in FOC control, CNC metal suspension, LIN bus communication, IP32 protection, and 12 kg payload capacity for heavy-duty robotics.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** robot-platform
- **Price:** ~$319.99
- **CPU:** ESP32-S3
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **USB:** USB Type-A
- **Power:** 9-12.6V DC / 3S2P 18650 Li-ion
- **Dimensions:** 235.25 x 173 x 101.24mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Dual-core WiFi & BLE 5.0 controller with strong/weak electric isolation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-cobra-flex&source=md-export)
- **FOC Hub Motor** (motor): Hub motor with integrated FOC control circuit, 180 RPM no-load at 12V, 0.15 Nm/V torque (x4) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FCobra_Flex&ref=openhardware.directory&product=waveshare-cobra-flex&source=md-export)

## Protocols

- **LIN**
- **UART**
- **USB**
- **HTTP**
- **RS-485**
- **TTL**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fcobra-flex.htm&ref=openhardware.directory&product=waveshare-cobra-flex&source=md-export) — $319.99

## Available Software

- [Cobra Flex Firmware](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FCobra_Flex&ref=openhardware.directory&product=waveshare-cobra-flex&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fcobra-flex.htm&ref=openhardware.directory&product=waveshare-cobra-flex&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FCobra_Flex&ref=openhardware.directory&product=waveshare-cobra-flex&source=md-export)

## Tags

`robotics`, `rover`, `esp32-s3`, `4wd`, `foc`, `hub-motor`, `open-source`, `heavy-duty`, `modular`, `drive-by-wire`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-cobra-flex)

---

# LuckFox Lyra

> Compact Linux SBC based on Rockchip RK3506G2 with triple-core ARM Cortex-A7 @ 1.2GHz + Cortex-M0 MCU, 128MB DDR3L, MIPI DSI display output (up to 1280x800), 24 Rockchip Matrix IO pins, and built-in audio/video codec.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** linux-sbc
- **Price:** ~$7.99
- **CPU:** Rockchip RK3506
- **RAM:** 128MB DDR3L
- **Flash:** microSD (TF)
- **GPIO:** 24 pins
- **USB:** USB-C 2.0
- **Power:** 5V

## Compatible Firmware

- buildroot

## Components

- **RK3506** (soc): Triple-core ARM Cortex-A7 @ 1.2GHz + Cortex-M0 MCU with built-in audio/video codec — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fuploads%2Fpdf%2F2024.8.9%2FRockchip%2520RK3506%2520Datasheet%2520V1.0-20240729.pdf&ref=openhardware.directory&product=luckfox-lyra&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **PWM**
- **CAN**
- **MIPI DSI**
- **USB 2.0**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-lyra.htm&ref=openhardware.directory&product=luckfox-lyra&source=md-export) — $7.99

## Available Software

- [LuckFox Lyra SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-lyra&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-lyra.htm&ref=openhardware.directory&product=luckfox-lyra&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-lyra&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Lyra%2F&ref=openhardware.directory&product=luckfox-lyra&source=md-export)

## Tags

`linux`, `sbc`, `rockchip`, `rk3506`, `arm`, `cortex-a7`, `cortex-m0`, `mipi-dsi`, `display`, `audio-codec`, `matrix-io`, `multi-core`

---
[View full device page](https://openhardware.directory/s/1370/luckfox-lyra)

---

# ESP32-C6-WROOM-1-N4 Module

> Espressif ESP32-C6 WROOM module with 4MB flash and PCB antenna, supporting Wi-Fi 6 (802.11ax), Bluetooth 5 LE, Zigbee 3.0, and Thread — for soldering onto custom IoT hardware.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** module
- **Price:** ~$2.95
- **CPU:** ESP32-C6
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **Power:** 3.3V supply rail
- **Dimensions:** 25.5 x 18.0 x 3.2 mm

## Connectivity

WiFi 802.11ax (Wi-Fi 6) | Bluetooth BLE 5.0 | Zigbee 3.0

## Compatible Firmware

- esp-idf
- arduino

## Components

- **ESP32-C6** (mcu): Espressif 32-bit RISC-V SoC with Wi-Fi 6, BT5 LE, Zigbee, Thread, 512KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5670%2Fesp32-c6-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=esp32-c6-wroom-1-n4&source=md-export)

## Protocols

- **I2C**: SDA=GPIO6, SCL=GPIO7
- **SPI**: MOSI=GPIO7, MISO=GPIO2, SCK=GPIO6
- **UART**: TX=GPIO16, RX=GPIO17
- **I2S**
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | D0 | — | digital, adc |
| GPIO1 | D1 | — | digital, adc |
| GPIO2 | MISO | — | spi-miso, digital, adc |
| GPIO3 | D3 | — | digital, adc |
| GPIO4 | D4 | — | digital, adc |
| GPIO5 | D5 | — | digital, adc |
| GPIO6 | SDA / SCK | — | i2c-sda, spi-sck, digital |
| GPIO7 | SCL / MOSI | — | i2c-scl, spi-mosi, digital |
| GPIO8 | D8 | — | digital |
| GPIO9 | D9 | — | digital |
| GPIO10 | D10 | — | digital |
| GPIO11 | D11 | — | digital |
| GPIO12 | D12 | — | digital |
| GPIO13 | D13 | — | digital |
| GPIO14 | D14 | — | digital |
| GPIO15 | D15 | — | digital |
| GPIO16 | TX | — | uart-tx, digital |
| GPIO17 | RX | — | uart-rx, digital |
| GPIO18 | D18 | — | digital |
| GPIO19 | D19 | — | digital |
| GPIO20 | D20 | — | digital |
| GPIO21 | D21 | — | digital |
| GPIO22 | D22 | — | digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5670&ref=openhardware.directory&product=esp32-c6-wroom-1-n4&source=md-export) — 2.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5670&ref=openhardware.directory&product=esp32-c6-wroom-1-n4&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5670%2Fesp32-c6-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=esp32-c6-wroom-1-n4&source=md-export)

## Tags

`esp32-c6`, `espressif`, `wifi6`, `zigbee`, `thread`, `ble`, `module`, `wroom`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/esp32-c6-wroom-1-n4)

---

# Arduino Due

> Arduino's first 32-bit ARM board based on the AT91SAM3X8E Cortex-M3 at 84 MHz with 512KB flash, 96KB SRAM, dual USB ports, 2 DACs, and 12 PWM channels in Mega form factor.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$47.5
- **CPU:** AT91SAM3X8E ARM Cortex-M3 @ 84 MHz
- **RAM:** 96 KB
- **Flash:** 512 KB
- **Power:** 5V via Micro USB or 7-12V DC barrel jack
- **Dimensions:** 101.52 × 53.3 mm

## Compatible Firmware

- arduino
- platformio

## Components

- **AT91SAM3X8E** (mcu): Atmel ARM Cortex-M3 at 84 MHz with 512KB flash, 96KB SRAM, USB OTG host, 2 DACs, CAN bus — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-11057-32-bit-Cortex-M3-Microcontroller-SAM3X-SAM3A_Datasheet.pdf&ref=openhardware.directory&product=arduino-due&source=md-export)

## Protocols

- **UART**: TX0=D1, RX0=D0, TX1=D18, RX1=D19, TX2=D16, RX2=D17, TX3=D14, RX3=D15
- **SPI**: MOSI=D75, MISO=D74, SCK=D76, SS=D10
- **I2C**: SDA=D20, SCL=D21
- **USB**
- **CAN**
- **ICSP**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX0 | — | digital-input, digital-output |
| D1 | TX0 | — | digital-input, digital-output |
| D2 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D3 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D4 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D7 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D8 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D9 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D10 | SS / PWM | — | digital-input, digital-output, pwm |
| D11 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D12 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D13 | LED / PWM | — | digital-input, digital-output, pwm |
| D14 | TX3 | — | digital-input, digital-output |
| D15 | RX3 | — | digital-input, digital-output |
| D16 | TX2 | — | digital-input, digital-output |
| D17 | RX2 | — | digital-input, digital-output |
| D18 | TX1 | — | digital-input, digital-output |
| D19 | RX1 | — | digital-input, digital-output |
| D20 | SDA | — | digital-input, digital-output |
| D21 | SCL | — | digital-input, digital-output |
| D74 | MISO (ICSP pin 1) | — | digital-input, digital-output |
| D75 | MOSI (ICSP pin 4) | — | digital-input, digital-output |
| D76 | SCK (ICSP pin 3) | — | digital-input, digital-output |
| DAC0 | DAC0 | — | analog-output |
| DAC1 | DAC1 | — | analog-output |
| A0 | Analog 0 | — | analog-input, digital-input, digital-output |
| A1 | Analog 1 | — | analog-input, digital-input, digital-output |
| A2 | Analog 2 | — | analog-input, digital-input, digital-output |
| A3 | Analog 3 | — | analog-input, digital-input, digital-output |
| A4 | Analog 4 | — | analog-input, digital-input, digital-output |
| A5 | Analog 5 | — | analog-input, digital-input, digital-output |
| A6 | Analog 6 | — | analog-input, digital-input, digital-output |
| A7 | Analog 7 | — | analog-input, digital-input, digital-output |
| A8 | Analog 8 | — | analog-input, digital-input, digital-output |
| A9 | Analog 9 | — | analog-input, digital-input, digital-output |
| A10 | Analog 10 | — | analog-input, digital-input, digital-output |
| A11 | Analog 11 | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Farduino-due&ref=openhardware.directory&product=arduino-due&source=md-export) — $47.50
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Farduino-due&ref=openhardware.directory&product=arduino-due&source=md-export) — €52.50
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FA000062%2F3476358&ref=openhardware.directory&product=arduino-due&source=md-export) — $47.15
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FA000062&ref=openhardware.directory&product=arduino-due&source=md-export) — $47.15
- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB00A6C3JN2&ref=openhardware.directory&product=arduino-due&source=md-export) — $47.15

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F1076&ref=openhardware.directory&product=arduino-due&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fdue&ref=openhardware.directory&product=arduino-due&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-11057-32-bit-Cortex-M3-Microcontroller-SAM3X-SAM3A_Datasheet.pdf&ref=openhardware.directory&product=arduino-due&source=md-export)

## Tags

`arduino`, `arm`, `cortex-m3`, `32-bit`, `development-board`, `dac`, `usb-host`

---
[View full device page](https://openhardware.directory/s/1370/arduino-due)

---

# Circuit Playground Bluefruit

> Round educational microcontroller with Nordic nRF52840 (64MHz Cortex-M4F + BLE), 10 NeoPixels, accelerometer, microphone, light sensor, speaker, 8 alligator-clip I/O pads, and USB. Runs CircuitPython, MakeCode, and Arduino.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** educational-board
- **Price:** ~$24.95
- **CPU:** ARM Cortex-M4F @ 64MHz (Nordic nRF52840)
- **RAM:** 256KB SRAM
- **Flash:** 1MB + 2MB SPI Flash
- **Power:** 5V via Micro-USB, 3xAAA battery, or LiPo
- **Dimensions:** 50.6mm diameter

## Connectivity

WiFi false | Bluetooth Bluetooth 5.0 BLE (nRF52840) | Zigbee false | Ethernet false

## Compatible Firmware

- circuitpython
- makecode
- arduino

## Components

- **nRF52840** (mcu): Nordic Semiconductor nRF52840 ARM Cortex-M4F @ 64MHz, 1MB Flash, 256KB RAM, Bluetooth 5.0 BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52840_PS_v1.7.pdf&ref=openhardware.directory&product=circuit-playground-bluefruit&source=md-export)
- **LIS3DH** (mcu): Triple-axis MEMS accelerometer with tap and free-fall detection, I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flis3dh.pdf&ref=openhardware.directory&product=circuit-playground-bluefruit&source=md-export)

## Protocols

- **I2C**: SDA=GPIO25, SCL=GPIO26
- **SPI**: MOSI=GPIO15, MISO=GPIO14, SCK=GPIO12
- **UART**: TX=GPIO6, RX=GPIO8
- **PWM**
- **ADC**
- **BLE**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO4 | A0 — DAC/ADC | — | analog-input, dac, digital-input, digital-output, pwm |
| GPIO5 | A1 — ADC | — | analog-input, digital-input, digital-output, pwm |
| GPIO30 | A2 — ADC | — | analog-input, digital-input, digital-output |
| GPIO28 | A3 — ADC | — | analog-input, digital-input, digital-output |
| GPIO2 | A4 — ADC | — | analog-input, digital-input, digital-output, pwm |
| GPIO3 | A5 — ADC | — | analog-input, digital-input, digital-output, pwm |
| GPIO6 | A6 — ADC/TX | — | analog-input, digital-input, digital-output |
| GPIO8 | A7 — ADC/RX | — | analog-input, digital-input, digital-output |
| GPIO25 | SDA — I2C | — | digital-input, digital-output |
| GPIO26 | SCL — I2C | — | digital-input, digital-output |
| GPIO15 | MOSI — SPI | — | digital-input, digital-output |
| GPIO14 | MISO — SPI | — | digital-input, digital-output |
| GPIO12 | SCK — SPI | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4333&ref=openhardware.directory&product=circuit-playground-bluefruit&source=md-export) — 24.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4333&ref=openhardware.directory&product=circuit-playground-bluefruit&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4333&ref=openhardware.directory&product=circuit-playground-bluefruit&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-circuit-playground-bluefruit&ref=openhardware.directory&product=circuit-playground-bluefruit&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_CircuitPlayground&ref=openhardware.directory&product=circuit-playground-bluefruit&source=md-export)

## Tags

`circuit-playground`, `nrf52840`, `bluetooth`, `ble`, `neopixel`, `circuitpython`, `makecode`, `educational`, `adafruit`

## Certifications

RoHS, FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/circuit-playground-bluefruit)

---

# ESP32-H2-MINI-1 Module

> Espressif ESP32-H2 MINI module with 4MB flash and PCB antenna, supporting Bluetooth 5 LE, Zigbee 3.0, Thread, and Matter — a compact bare module for custom PCB designs without Wi-Fi.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** module
- **Price:** ~$2.25
- **CPU:** ESP32-H2
- **RAM:** 320KB
- **Flash:** 4MB
- **Power:** 3.3V supply rail

## Connectivity

Bluetooth BLE 5.0 | Zigbee 3.0

## Compatible Firmware

- esp-idf
- arduino
- Zephyr

## Components

- **ESP32-H2** (mcu): 32-bit RISC-V at 96 MHz, 320KB SRAM, BT5 LE, Zigbee, Thread, Matter. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5716%2F5716-datasheet.pdf&ref=openhardware.directory&product=esp32-h2-mini-1&source=md-export)

## Protocols

- **I2C**: SDA=GPIO22, SCL=GPIO23
- **SPI**: MOSI=GPIO5, MISO=GPIO4, SCK=GPIO6
- **UART**: TX=GPIO24, RX=GPIO25
- **I2S**
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | D0 | — | digital, adc |
| GPIO1 | D1 | — | digital, adc |
| GPIO2 | D2 | — | digital, adc |
| GPIO3 | D3 | — | digital, adc |
| GPIO4 | MISO | — | spi-miso, digital |
| GPIO5 | MOSI | — | spi-mosi, digital |
| GPIO6 | SCK | — | spi-sck, digital |
| GPIO7 | D7 | — | digital |
| GPIO8 | D8 | — | digital |
| GPIO9 | D9 | — | digital |
| GPIO10 | D10 | — | digital |
| GPIO11 | D11 | — | digital |
| GPIO12 | D12 | — | digital |
| GPIO13 | D13 | — | digital |
| GPIO14 | D14 | — | digital |
| GPIO22 | SDA | — | i2c-sda, digital |
| GPIO23 | SCL | — | i2c-scl, digital |
| GPIO24 | TX | — | uart-tx, digital |
| GPIO25 | RX | — | uart-rx, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5716&ref=openhardware.directory&product=esp32-h2-mini-1&source=md-export) — 2.25

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5716&ref=openhardware.directory&product=esp32-h2-mini-1&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5716%2F5716-datasheet.pdf&ref=openhardware.directory&product=esp32-h2-mini-1&source=md-export)

## Tags

`esp32-h2`, `espressif`, `zigbee`, `thread`, `matter`, `ble`, `module`, `mini`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/esp32-h2-mini-1)

---

# Adafruit Feather 32u4 Bluefruit LE

> Feather-format ATmega32u4 board with integrated nRF51822 Bluetooth LE, LiPo charging, native USB, 20 GPIO, and over-the-air firmware updates — an all-in-one BLE development board for iOS and Android connectivity.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$29.95
- **CPU:** ATmega32u4 @ 8 MHz
- **RAM:** 2 KB
- **Flash:** 32 KB
- **Power:** 3.7V LiPo via JST or 5V Micro USB
- **Dimensions:** 51.2 × 22.8 × 8 mm

## Connectivity

Bluetooth Bluetooth LE 4.1 (nRF51822)

## Compatible Firmware

- arduino
- platformio

## Components

- **ATmega32u4** (mcu): 8-bit AVR with native USB at 8 MHz, 32KB flash, 2KB SRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-bluefruit-le&source=md-export)
- **nRF51822** (wireless): Nordic nRF51822 ARM Cortex-M0 Bluetooth LE 4.1 SoC with 256KB flash, AT command firmware, GATT and UART profiles — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF51822_PS_v3.3.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-bluefruit-le&source=md-export)
- **MCP73831** (charger): Microchip MCP73831 100mA LiPo charge management IC — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F20001984g.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-bluefruit-le&source=md-export)

## Protocols

- **UART**: TX=D1, RX=D0
- **SPI**: MOSI=D16, MISO=D14, SCK=D15, SS=D10, BLE_CS=D8
- **I2C**: SDA=D2, SCL=D3
- **USB**
- **Bluetooth LE**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX / INT2 | — | digital-input, digital-output, interrupt |
| D1 | TX / INT3 | — | digital-input, digital-output, interrupt |
| D2 | SDA / INT1 | — | digital-input, digital-output, interrupt |
| D3 | SCL / INT0 / PWM | — | digital-input, digital-output, pwm, interrupt |
| D4 | GPIO / A6 | — | digital-input, digital-output, analog-input |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / A7 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D7 | BLE_IRQ / INT6 | — | digital-input, digital-output, interrupt |
| D8 | BLE_CS | — | digital-output |
| D9 | BATT / A9 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D10 | SS / A10 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D11 | BLE_RST | — | digital-output |
| D12 | GPIO / A11 | — | digital-input, digital-output, analog-input |
| D13 | LED / PWM | — | digital-input, digital-output, pwm |
| D14 | MISO | — | digital-input, digital-output |
| D15 | SCK | — | digital-input, digital-output |
| D16 | MOSI | — | digital-input, digital-output |
| A0 | Analog 0 / D18 | — | analog-input, digital-input, digital-output |
| A1 | Analog 1 / D19 | — | analog-input, digital-input, digital-output |
| A2 | Analog 2 / D20 | — | analog-input, digital-input, digital-output |
| A3 | Analog 3 / D21 | — | analog-input, digital-input, digital-output |
| A4 | Analog 4 / D22 | — | analog-input, digital-input, digital-output |
| A5 | Analog 5 / D23 | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2829&ref=openhardware.directory&product=adafruit-feather-32u4-bluefruit-le&source=md-export) — 29.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2829&ref=openhardware.directory&product=adafruit-feather-32u4-bluefruit-le&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-32u4-bluefruit-le&ref=openhardware.directory&product=adafruit-feather-32u4-bluefruit-le&source=md-export)

## Tags

`feather`, `atmega32u4`, `bluetooth-le`, `ble`, `nrf51822`, `adafruit`, `bluefruit`, `lipo`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-32u4-bluefruit-le)

---

# LILYGO T-Beam Supreme

> Upgraded T-Beam with ESP32-S3FN8, QMI8658 6-axis IMU, LoRa SX1262, dual GPS options (L76K or u-blox), SoftRF firmware support, and multi-frequency bands for Meshtastic and aircraft tracking.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$37.12
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **USB:** USB-C
- **Power:** 5V + Li-Ion 18650

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython
- esp-idf
- meshtastic
- softrf

## Components

- **ESP32-S3FN8** (mcu): Xtensa LX7 dual-core at 240MHz with 8MB flash, 8MB PSRAM, WiFi 802.11 b/g/n, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-beam-supreme&source=md-export)
- **SX1262** (radio): Long-range LoRa transceiver supporting 150–960 MHz with up to +22 dBm output for Meshtastic, SoftRF, and APRS. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-beam-supreme&source=md-export)
- **QMI8658** (accelerometer): 6-axis inertial measurement unit with 3-axis accelerometer and 3-axis gyroscope via I2C/SPI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.qstcorp.com%2Fupload%2Fpdf%2F202202%2F13-52-58%2520QMI8658A%2520Datasheet%2520Rev%2520A.pdf&ref=openhardware.directory&product=lilygo-t-beam-supreme&source=md-export)
- **L76K** (gps): Multi-constellation GNSS module supporting GPS, BeiDou, and GLONASS with 1PPS output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.quectel.com%2FUploadImage%2FAndrd%2FQuectel_L76K_GNSS_Specification_V1.0.pdf&ref=openhardware.directory&product=lilygo-t-beam-supreme&source=md-export)

## Protocols

- **SPI**: CLK=GPIO12, MOSI=GPIO11, MISO=GPIO13
- **I2C**: SDA=GPIO4, SCL=GPIO3
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO4 | I2C SDA | — | digital-input, digital-output |
| GPIO3 | I2C SCL | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-beam-supreme&ref=openhardware.directory&product=lilygo-t-beam-supreme&source=md-export) — $37.12

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-beam-supreme&ref=openhardware.directory&product=lilygo-t-beam-supreme&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Beam-Supreme&ref=openhardware.directory&product=lilygo-t-beam-supreme&source=md-export)

## Tags

`esp32-s3`, `lora`, `gps`, `meshtastic`, `softrf`, `imu`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-beam-supreme)

---

# LILYGO T-Relay S3

> ESP32-S3 board with 6 onboard relays, 16MB flash, 8MB PSRAM, WiFi, and BLE for ESPHome smart home automation, controlling lights, appliances, and HVAC systems.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$23.99
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- esphome
- tasmota

## Components

- **ESP32-S3-WROOM-1U** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi 802.11 b/g/n, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-relay-s3&source=md-export)
- **relay** (relay): Six electromechanical relays for switching AC/DC loads up to 10A, each independently controlled by a GPIO pin. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Relay-S3&ref=openhardware.directory&product=lilygo-t-relay-s3&source=md-export)

## Protocols

- **I2C**: SDA=GPIO8, SCL=GPIO9
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO8 | I2C SDA | — | digital-input, digital-output |
| GPIO9 | I2C SCL | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-relay-s3&ref=openhardware.directory&product=lilygo-t-relay-s3&source=md-export) — $23.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-relay-s3&ref=openhardware.directory&product=lilygo-t-relay-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Relay-S3&ref=openhardware.directory&product=lilygo-t-relay-s3&source=md-export)

## Tags

`esp32-s3`, `relay`, `esphome`, `tasmota`, `home-automation`, `smart-switch`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-relay-s3)

---

# LILYGO T-Display Bar

> ESP32-S3 development board with a unique wide bar-format display, 16MB flash, 8MB PSRAM, and USB-C for information display and custom UI projects.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$27.36
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- micropython

## Components

- **ESP32-S3R8** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi 802.11 b/g/n and BLE 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-display-bar&source=md-export)
- **ST7789** (display-driver): Sitronix ST7789 TFT driver for the 76×284 bar-format IPS LCD with SPI interface and capacitive touch (CSTxxx) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7789.pdf&ref=openhardware.directory&product=lilygo-t-display-bar&source=md-export)
- **BHI260AP** (imu): Bosch BHI260AP AI-powered 6-axis IMU with accelerometer and gyroscope, connected via I2C — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bhi260ap-ds000.pdf&ref=openhardware.directory&product=lilygo-t-display-bar&source=md-export)
- **BQ25896** (battery-charger): Texas Instruments BQ25896 standalone switch-mode battery charging IC — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fbq25896.pdf&ref=openhardware.directory&product=lilygo-t-display-bar&source=md-export)
- **PCF8563** (rtc): NXP PCF8563 low-power RTC with alarm and timer functions, connected via I2C — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FPCF8563.pdf&ref=openhardware.directory&product=lilygo-t-display-bar&source=md-export)

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-bar&ref=openhardware.directory&product=lilygo-t-display-bar&source=md-export) — $27.36
- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Flilygo-t-display-bar-esp32&ref=openhardware.directory&product=lilygo-t-display-bar&source=md-export) — €34.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-display-bar&ref=openhardware.directory&product=lilygo-t-display-bar&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Display-Bar&ref=openhardware.directory&product=lilygo-t-display-bar&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-display-bar)

---

# LILYGO T-Call V1.4

> ESP32 development board with SIM800L 2G GSM/GPRS cellular modem, Wi-Fi, Bluetooth 4.2, USB-C charging, and Li-Po battery connector for IoT devices requiring SMS and GPRS data connectivity.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$16.51
- **CPU:** ESP32
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf
- platformio

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 at 240MHz with Wi-Fi b/g/n and Bluetooth 4.2 BR/EDR+BLE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-call-v1-4&source=md-export)
- **SIM800L** (cellular-modem): Quad-band 2G GSM/GPRS modem supporting SMS, voice calls, and GPRS data — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsimcom.ee%2Fdocuments%2FSIM800%2FSIM800_Hardware_Design_V1.09.pdf&ref=openhardware.directory&product=lilygo-t-call-v1-4&source=md-export)
- **IP5306** (battery-charger): Li-Po battery charging and power path management IC — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Fszlcsc%2FIP5306_C181692.pdf&ref=openhardware.directory&product=lilygo-t-call-v1-4&source=md-export)
- **CH9102** (usb-serial): CH9102 USB to UART bridge chip for programming — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH9102.html&ref=openhardware.directory&product=lilygo-t-call-v1-4&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **SDIO**
- **I2S**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-call-v1-4&ref=openhardware.directory&product=lilygo-t-call-v1-4&source=md-export) — $16.51

## Available Software

- [Arduino IDE](https://openhardware.directory/r?to=https%3A%2F%2Fwww.arduino.cc%2F&ref=openhardware.directory&product=lilygo-t-call-v1-4&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-call-v1-4&ref=openhardware.directory&product=lilygo-t-call-v1-4&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T-Call-SIM800&ref=openhardware.directory&product=lilygo-t-call-v1-4&source=md-export)

## Tags

`esp32`, `gsm`, `gprs`, `sim800l`, `cellular`, `sms`, `2g`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-call-v1-4)

---

# Waveshare ESP32-H2-Zero

> Ultra-compact castellated ESP32-H2 development board with BLE 5.2, Zigbee 3.0, Thread 1.3, and Matter support. USB-C powered with WS2812 RGB LED, 15 GPIO pins, and 4MB flash in a tiny 23.5 x 15.2mm form factor.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$3.49
- **CPU:** RISC-V RV32IMC single-core @ 96MHz, HW crypto (AES/SHA/RSA/ECC/HMAC)
- **RAM:** 320KB SRAM
- **Flash:** 4MB
- **GPIO:** 15 pins
- **USB:** USB-C
- **Power:** 5V
- **Dimensions:** 23.5 x 15.2mm

## Connectivity

Bluetooth BLE 5.2 | Zigbee Zigbee 3.0

## Compatible Firmware

- arduino
- esp-idf
- esphome

## Components

- **ESP32-H2** (mcu): ESP32-H2FH4S RISC-V single-core @ 96MHz with 320KB SRAM, 4MB flash, BLE 5.2, IEEE 802.15.4 (Zigbee/Thread) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-h2_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-h2-zero&source=md-export)
- **WS2812B** (led-driver): WS2812 addressable RGB LED for status indication and visual feedback — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=waveshare-esp32-h2-zero&source=md-export)
- **ME6217C33M5G** (power-management): Microne ME6217C33M5G LDO providing 3.3V at up to 800mA from 5V USB input — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F1912111437_MICRONE-Nanjing-Micro-One-Elec-ME6217C33M5G_C427602.pdf&ref=openhardware.directory&product=waveshare-esp32-h2-zero&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **JTAG**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | SPI MISO / ADC1_CH0 | — | digital-input, digital-output, adc, pwm |
| GPIO1 | SPI SCK / ADC1_CH1 | — | digital-input, digital-output, adc, pwm |
| GPIO2 | SPI MOSI | — | digital-input, digital-output, pwm |
| GPIO3 | I2C SDA / ADC1_CH2 | — | digital-input, digital-output, adc, pwm |
| GPIO4 | I2C SCL / ADC1_CH3 | — | digital-input, digital-output, adc, pwm |
| GPIO5 | ADC1_CH4 | — | digital-input, digital-output, adc, pwm |
| GPIO8 | WS2812 data (onboard LED) | — | digital-input, digital-output, pwm |
| GPIO9 | BOOT button | — | digital-input, digital-output, pwm |
| GPIO10 | General purpose | — | digital-input, digital-output, pwm |
| GPIO11 | General purpose | — | digital-input, digital-output, pwm |
| GPIO12 | General purpose | — | digital-input, digital-output, pwm |
| GPIO13 | JTAG MTMS | — | digital-input, digital-output, pwm |
| GPIO14 | JTAG MTDI | — | digital-input, digital-output, pwm |
| GPIO22 | UART TX | — | digital-input, digital-output, pwm |
| GPIO23 | UART RX | — | digital-input, digital-output, pwm |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-h2-zero.htm&ref=openhardware.directory&product=waveshare-esp32-h2-zero&source=md-export) — $3.49

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-h2-zero.htm&ref=openhardware.directory&product=waveshare-esp32-h2-zero&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam&ref=openhardware.directory&product=waveshare-esp32-h2-zero&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-H2-Zero&ref=openhardware.directory&product=waveshare-esp32-h2-zero&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-h2_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-h2-zero&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FESP32-H2-Zero%2FESP32-H2-Zero-Schematic.pdf&ref=openhardware.directory&product=waveshare-esp32-h2-zero&source=md-export)

## Tags

`esp32-h2`, `risc-v`, `zigbee`, `thread`, `matter`, `ble`, `castellated`, `usb-c`, `waveshare`, `802.15.4`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-esp32-h2-zero)

---

# Waveshare ESP32-S3-POE-ETH-8DI-8DO

> Industrial ESP32-S3 controller with 8-channel optocoupler-isolated digital inputs (5-36V), 8-channel Darlington outputs (500mA each), PoE Ethernet (W5500), isolated RS-485 and CAN bus, RTC, and DIN rail enclosure.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$42.99
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** PoE 802.3af / 7-36V DC / 5V USB-C
- **Dimensions:** 175 x 90 x 40mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0 | Ethernet 10/100 Mbps (W5500, PoE 802.3af)

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-S3-WROOM-1U-N16R8** (mcu): Espressif ESP32-S3-WROOM-1U module with Xtensa LX7 dual-core @ 240MHz, 16MB flash, 8MB PSRAM, U.FL antenna connector — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export)
- **W5500** (ethernet-phy): WIZnet W5500 hardwired TCP/IP Ethernet controller with SPI interface, 10/100 Mbps, 8 simultaneous sockets — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wiznet.io%2Fwp-content%2Fuploads%2Fwiznethome%2FChip%2FW5500%2FDocuments%2FW5500_ds_v110e.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export)
- **TCA9554PWR** (io-expander): Texas Instruments TCA9554PWR 8-bit I2C GPIO expander controlling the 8 digital output channels — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftca9554.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export)
- **PCF85063** (rtc): NXP PCF85063 real-time clock with 1220 rechargeable battery backup for scheduled automation tasks — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FPCF85063A.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export)
- **WS2812B** (led-driver): WS2812 addressable RGB LED for visual status indication — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export)

## Protocols

- **SPI**
- **RS-485**
- **CAN**
- **I2C**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | BOOT button | — | digital-input, strapping |
| GPIO2 | CAN TX | — | digital-input, digital-output |
| GPIO3 | CAN RX | — | digital-input, digital-output |
| GPIO4 | DI_CH1 (digital input) | — | digital-input |
| GPIO5 | DI_CH2 (digital input) | — | digital-input |
| GPIO6 | DI_CH3 (digital input) | — | digital-input |
| GPIO7 | DI_CH4 (digital input) | — | digital-input |
| GPIO8 | DI_CH5 (digital input) | — | digital-input |
| GPIO9 | DI_CH6 (digital input) | — | digital-input |
| GPIO10 | DI_CH7 (digital input) | — | digital-input |
| GPIO11 | DI_CH8 (digital input) | — | digital-input |
| GPIO12 | ETH_INT | — | digital-input |
| GPIO13 | ETH_MOSI | — | digital-output |
| GPIO14 | ETH_MISO | — | digital-input |
| GPIO15 | ETH_SCLK | — | digital-output |
| GPIO16 | ETH_CS | — | digital-output |
| GPIO17 | RS-485 TX | — | digital-output |
| GPIO18 | RS-485 RX | — | digital-input |
| GPIO21 | RS-485 RTS | — | digital-output |
| GPIO38 | WS2812 RGB LED data | — | digital-output |
| GPIO39 | ETH_RST | — | digital-output |
| GPIO40 | RTC_INT | — | digital-input |
| GPIO41 | I2C SCL | — | digital-input, digital-output |
| GPIO42 | I2C SDA | — | digital-input, digital-output |
| GPIO45 | SD_D0 | — | digital-input, digital-output |
| GPIO46 | Buzzer control | — | digital-output |
| GPIO47 | SD_CMD | — | digital-input, digital-output |
| GPIO48 | SD_SCK | — | digital-output |

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-poe-eth-8di-8do.htm&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export) — $42.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-poe-eth-8di-8do.htm&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FVolosR%2FwaveshareControl&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-S3-POE-ETH-8DI-8DO&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-poe-eth-8di-8do&source=md-export)

## Tags

`esp32-s3`, `poe`, `ethernet`, `w5500`, `digital-io`, `industrial`, `din-rail`, `rs485`, `can-bus`, `optocoupler`, `waveshare`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-esp32-s3-poe-eth-8di-8do)

---

# TI SK-AM62-LP Starter Kit

> Texas Instruments AM62x Sitara low-power evaluation board with quad-core Cortex-A53, 1GB LPDDR4, microSD, 100Mbps Ethernet, USB-C, and 5V USB-C power — the LP variant optimized for ultra-low-power HMI and IoT designs.

## Quick Facts

- **Brand:** Texas Instruments
- **Board Type:** linux-sbc
- **Price:** ~$229
- **CPU:** ti-am62x
- **RAM:** 1GB LPDDR4
- **Flash:** microSD boot
- **USB:** USB-C
- **Power:** 5V

## Connectivity

Ethernet 100Mbps

## Compatible Firmware

- armbian

## Where to Buy

- [TI Store](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FSK-AM62-LP%2Fpart-details%2FSK-AM62-LP&ref=openhardware.directory&product=ti-sk-am62-lp&source=md-export) — $229.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fti-sk-am62-lp%2F&ref=openhardware.directory&product=ti-sk-am62-lp&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/ti-sk-am62-lp)

---

# TI TMDS62LEVM

> Texas Instruments AM62L display evaluation module with dual Cortex-A53 @ 1.25GHz, 2GB LPDDR4, 32GB eMMC, dual Gigabit Ethernet, DSI + HDMI display outputs, WiFi/BT M.2, and USB-C — purpose-built for evaluating AM62L display subsystem integration.

## Quick Facts

- **Brand:** Texas Instruments
- **Board Type:** linux-sbc
- **Price:** ~$189
- **CPU:** ti-am62x
- **RAM:** 2GB LPDDR4
- **Flash:** 32GB eMMC
- **USB:** USB 2.0 + USB-C
- **Power:** 5V

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- armbian

## Where to Buy

- [TI Store](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Ftool%2FTMDS62LEVM&ref=openhardware.directory&product=ti-tmds62levm&source=md-export) — $189.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Ftexas-instruments-tmds62levm%2F&ref=openhardware.directory&product=ti-tmds62levm&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/ti-tmds62levm)

---

# Adafruit Metro M7 with AirLift

> Arduino UNO-compatible Metro board powered by NXP iMX RT1011 at 500 MHz with an ESP32 AirLift WiFi co-processor, 8 MB QSPI Flash, and USB-C — Adafruit's fastest Metro ever.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$29.95
- **CPU:** NXP iMX RT1011 ARM Cortex-M7 @ 500 MHz
- **RAM:** 128 KB SRAM
- **Flash:** 8MB QSPI
- **Power:** 5V via USB-C or 6-12V barrel jack
- **Dimensions:** 53.2 × 72.0 × 14.8 mm

## Connectivity

WiFi 802.11 b/g/n

## Compatible Firmware

- circuitpython

## Components

- **NXP iMX RT1011** (mcu): 500 MHz ARM Cortex-M7 microcontroller with 128 KB SRAM, high-speed USB, and extensive peripheral set. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FIMXRT1010CEC.pdf&ref=openhardware.directory&product=adafruit-metro-m7-airlift&source=md-export)
- **ESP32** (wireless): ESP32-based AirLift WiFi co-processor providing 802.11 b/g/n connectivity with TLS/SSL support via SPI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-metro-m7-airlift&source=md-export)

## Protocols

- **I2C**: SDA=D20, SCL=D21
- **I2C (STEMMA QT)**: SDA=D20, SCL=D21
- **SPI**: MOSI=D23, MISO=D22, SCK=D24
- **UART**: TX=D1, RX=D0
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | D0/RX | — | UART, GPIO |
| D1 | D1/TX | — | UART, GPIO |
| D2 | D2 | — | GPIO |
| D3 | D3 | — | GPIO, PWM |
| D4 | D4 | — | GPIO |
| D5 | D5 | — | GPIO, PWM |
| D6 | D6 | — | GPIO, PWM |
| D7 | D7 | — | GPIO |
| D8 | D8 | — | GPIO |
| D9 | D9 | — | GPIO, PWM |
| D10 | D10 | — | GPIO, PWM |
| D11 | D11 | — | GPIO, PWM |
| D12 | D12 | — | GPIO |
| D13 | D13/LED | — | GPIO |
| A0 | A0 | — | ADC, GPIO |
| A1 | A1 | — | ADC, GPIO |
| A2 | A2 | — | ADC, GPIO |
| A3 | A3 | — | ADC, GPIO |
| A4 | A4 | — | ADC, GPIO |
| A5 | A5 | — | ADC, GPIO |
| D20 | SDA (STEMMA QT) | — | I2C, STEMMA QT |
| D21 | SCL (STEMMA QT) | — | I2C, STEMMA QT |
| D23 | MOSI | — | SPI |
| D22 | MISO | — | SPI |
| D24 | SCK | — | SPI |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4950&ref=openhardware.directory&product=adafruit-metro-m7-airlift&source=md-export) — 29.95

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_metro_m7_1011_airlift%2F&ref=openhardware.directory&product=adafruit-metro-m7-airlift&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4950&ref=openhardware.directory&product=adafruit-metro-m7-airlift&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Metro-M7-PCB&ref=openhardware.directory&product=adafruit-metro-m7-airlift&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-metro-m7-1011-with-airlift&ref=openhardware.directory&product=adafruit-metro-m7-airlift&source=md-export)

## Tags

`metro`, `imxrt1011`, `airlift`, `esp32-wifi`, `circuitpython`, `arduino-shield`, `usb-c`, `stemma-qt`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-metro-m7-airlift)

---

# Adafruit ItsyBitsy nRF52840 Express

> Tiny breadboard-friendly Bluetooth LE board with Nordic nRF52840 Cortex-M4F @ 64MHz, 1MB Flash, 256KB RAM, 2MB QSPI Flash, 21 GPIO, and native USB — all in a 36×17.6mm footprint. Supports CircuitPython and Arduino.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** microcontroller-board
- **Price:** ~$19.95
- **CPU:** ARM Cortex-M4F @ 64MHz (Nordic nRF52840)
- **RAM:** 256KB SRAM
- **Flash:** 1024KB + 2MB QSPI Flash
- **Power:** 5V via Micro-USB or 3.7V LiPo
- **Dimensions:** 36.0 x 17.6 x 5.3mm

## Connectivity

WiFi false | Bluetooth Bluetooth 5.0 BLE (+8dBm, nRF52840) | Zigbee false | Ethernet false

## Compatible Firmware

- circuitpython
- arduino

## Components

- **nRF52840** (mcu): Nordic Semiconductor nRF52840 ARM Cortex-M4F @ 64MHz, 1MB Flash, 256KB RAM, Bluetooth 5.0 BLE, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52840_PS_v1.7.pdf&ref=openhardware.directory&product=adafruit-itsybitsy-nrf52840-express&source=md-export)

## Protocols

- **I2C**: SDA=GPIO25, SCL=GPIO26
- **SPI**: MOSI=GPIO15, MISO=GPIO14, SCK=GPIO12
- **UART**: TX=GPIO5, RX=GPIO6
- **I2S**
- **USB**
- **BLE**
- **PWM**
- **ADC**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO4 | A0 — DAC/ADC | — | analog-input, dac, digital-input, digital-output, pwm |
| GPIO5 | A1 — ADC/TX | — | analog-input, digital-input, digital-output, pwm |
| GPIO30 | A2 — ADC | — | analog-input, digital-input, digital-output |
| GPIO28 | A3 — ADC | — | analog-input, digital-input, digital-output |
| GPIO2 | D2 — GPIO | — | digital-input, digital-output, pwm |
| GPIO3 | D3 — GPIO/PWM | — | digital-input, digital-output, pwm |
| GPIO26 | D4 — SCL | — | digital-input, digital-output, pwm |
| GPIO27 | D5 — GPIO/PWM | — | digital-input, digital-output, pwm |
| GPIO7 | D7 — GPIO | — | digital-input, digital-output |
| GPIO6 | D9 — RX | — | digital-input, digital-output |
| GPIO8 | D10 — GPIO/PWM | — | digital-input, digital-output, pwm |
| GPIO15 | D11 — MOSI | — | digital-input, digital-output |
| GPIO14 | D12 — MISO | — | digital-input, digital-output |
| GPIO12 | D13 — SCK | — | digital-input, digital-output |
| GPIO25 | SDA — I2C | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4481&ref=openhardware.directory&product=adafruit-itsybitsy-nrf52840-express&source=md-export) — 19.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4481&ref=openhardware.directory&product=adafruit-itsybitsy-nrf52840-express&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4481&ref=openhardware.directory&product=adafruit-itsybitsy-nrf52840-express&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-itsybitsy-nrf52840-express&ref=openhardware.directory&product=adafruit-itsybitsy-nrf52840-express&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_nRF52_Arduino&ref=openhardware.directory&product=adafruit-itsybitsy-nrf52840-express&source=md-export)

## Tags

`itsybitsy`, `nrf52840`, `bluetooth`, `ble`, `circuitpython`, `adafruit`, `compact`, `usb-hid`

## Certifications

RoHS, FCC, CE, TELEC

---
[View full device page](https://openhardware.directory/s/1370/adafruit-itsybitsy-nrf52840-express)

---

# Adafruit Feather RP2040

> Feather-form-factor board with Raspberry Pi RP2040 dual-core Cortex-M0+ @ 133MHz, 264KB SRAM, 8MB Flash, 21 GPIO, 4 ADC, 2 PIO peripherals, USB-C with UF2 bootloader, STEMMA QT, and LiPo charging. Runs CircuitPython and MicroPython.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** microcontroller-board
- **Price:** ~$11.95
- **CPU:** Dual ARM Cortex-M0+ @ 133MHz (RP2040)
- **RAM:** 264KB SRAM (6 banks)
- **Flash:** 8MB SPI Flash
- **Power:** 5V via USB-C or LiPoly battery
- **Dimensions:** 51.0 x 23.0 x 7.5mm

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- circuitpython
- micropython
- arduino

## Components

- **RP2040** (mcu): Raspberry Pi RP2040 dual-core ARM Cortex-M0+ @ 133MHz, 264KB SRAM, 2x PIO, 16 PWM, USB 1.1. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.org%2Frp2040%2Frp2040_datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-rp2040&source=md-export)

## Protocols

- **I2C**: SDA=GPIO24, SCL=GPIO25
- **SPI**: MOSI=GPIO11, MISO=GPIO12, SCK=GPIO13
- **UART**: TX=GPIO0, RX=GPIO1
- **USB**
- **PIO**
- **PWM**
- **ADC**: ADC0=GPIO26, ADC1=GPIO27, ADC2=GPIO28, ADC3=GPIO29

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO26 | A0/ADC0 | — | ADC, GPIO, PWM |
| GPIO27 | A1/ADC1 | — | ADC, GPIO, PWM |
| GPIO28 | A2/ADC2 | — | ADC, GPIO, PWM |
| GPIO29 | A3/ADC3 | — | ADC, GPIO, PWM |
| GPIO4 | D4/PWM | — | PWM, GPIO |
| GPIO5 | D5/PWM | — | PWM, GPIO |
| GPIO6 | D6/PWM | — | PWM, GPIO |
| GPIO9 | D9/PWM | — | PWM, GPIO |
| GPIO10 | D10/PWM | — | PWM, GPIO |
| GPIO11 | D11/MOSI | — | SPI, GPIO, PWM |
| GPIO12 | D12/MISO | — | SPI, GPIO, PWM |
| GPIO13 | D13/SCK | — | SPI, GPIO, PWM |
| GPIO24 | D24/SDA | — | I2C, GPIO, PWM |
| GPIO25 | D25/SCL | — | I2C, GPIO, PWM |
| GPIO0 | TX | — | UART, GPIO, PWM |
| GPIO1 | RX | — | UART, GPIO, PWM |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4884&ref=openhardware.directory&product=adafruit-feather-rp2040&source=md-export) — 11.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4884&ref=openhardware.directory&product=adafruit-feather-rp2040&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4884&ref=openhardware.directory&product=adafruit-feather-rp2040&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-rp2040&ref=openhardware.directory&product=adafruit-feather-rp2040&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.org%2Frp2040%2Frp2040_datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-rp2040&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_Feather_RP2040&ref=openhardware.directory&product=adafruit-feather-rp2040&source=md-export)

## Tags

`feather`, `rp2040`, `raspberry-pi`, `circuitpython`, `micropython`, `pio`, `adafruit`, `usb-c`, `stemma-qt`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-rp2040)

---

# Heltec Wireless Bridge

> ESP32 + SX1276 LoRa multi-protocol bridge in an aluminum enclosure, converting between WiFi, Bluetooth, and LoRa with 8MB flash and 8MB PSRAM.

## Quick Facts

- **Brand:** Heltec
- **Board Type:** wireless-bridge
- **Price:** ~$28.9
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 8MB
- **USB:** Micro-USB (CP2102)
- **Power:** 5V via Micro-USB,3.7V LiPo
- **Dimensions:** 66 × 30 × 15mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth v4.2 BR/EDR, BLE

## Components

- **ESP32-D0WDQ6** (mcu): Xtensa LX6 dual-core MCU running at 240MHz with integrated WiFi 802.11 b/g/n and Bluetooth 4.2 BR/EDR + BLE, 520KB SRAM, hardware crypto acceleration. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=heltec-wireless-bridge&source=md-export)
- **SX1276** (radio): Semtech LoRa transceiver covering 137-1020MHz with +18dBm TX power and -135dBm RX sensitivity, supporting LoRa and FSK modulation for long-range communication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1276&ref=openhardware.directory&product=heltec-wireless-bridge&source=md-export)
- **CP2102** (usb-uart): Silicon Labs single-chip USB-to-UART bridge providing programming and serial debug interface via Micro-USB port. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=heltec-wireless-bridge&source=md-export)
- **ESP-PSRAM64H** (memory): Espressif 64Mbit (8MB) SPI PSRAM chip providing external memory for data buffering and protocol translation workloads. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp-psram64_esp-psram64h_datasheet_en.pdf&ref=openhardware.directory&product=heltec-wireless-bridge&source=md-export)
- **TP4054** (battery-charger): Standalone linear Li-Ion battery charger IC providing constant-current/constant-voltage charging for the internal LiPo battery via the 1.25mm JST connector. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fmedia.digikey.com%2Fpdf%2FData%2520Sheets%2FUTD%2520Semi%2520PDFs%2FTP4054.pdf&ref=openhardware.directory&product=heltec-wireless-bridge&source=md-export)
- **AO3401** (power-management): Alpha & Omega Semiconductor P-channel MOSFET used for power path switching between USB and battery sources. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.alldatasheet.com%2Fdatasheet-pdf%2Fpdf%2F216396%2FAOSMD%2FAO3401.html&ref=openhardware.directory&product=heltec-wireless-bridge&source=md-export)

## Protocols

- **SPI** (VSPI): SCK=GPIO5, MOSI=GPIO27, MISO=GPIO19, SS=GPIO18
- **I2C**: SDA=GPIO21, SCL=GPIO22
- **UART** (UART0): TX=GPIO1, RX=GPIO3
- **LoRa**: SCK=GPIO5, MOSI=GPIO27, MISO=GPIO19, NSS=GPIO18, RST=GPIO14, DIO0=GPIO26, DIO1=GPIO35, DIO2=GPIO34
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Boot / User Button | — | digital-input, digital-output, pwm, strapping |
| GPIO1 | UART0 TX | — | digital-input, digital-output, pwm |
| GPIO3 | UART0 RX | — | digital-input, digital-output, pwm |
| GPIO5 | SPI SCK / LoRa SCK | — | digital-input, digital-output, pwm |
| GPIO14 | LoRa RST | — | digital-input, digital-output, pwm, adc, touch |
| GPIO18 | SPI SS / LoRa NSS | — | digital-input, digital-output, pwm |
| GPIO19 | SPI MISO / LoRa MISO | — | digital-input, digital-output, pwm |
| GPIO21 | I2C SDA / Vext Control | — | digital-input, digital-output, pwm |
| GPIO22 | I2C SCL / LoRa LED | — | digital-input, digital-output, pwm |
| GPIO23 | WiFi LED | — | digital-input, digital-output, pwm |
| GPIO25 | Built-in LED / BLE LED | — | digital-input, digital-output, pwm, dac |
| GPIO26 | LoRa DIO0 (IRQ) | — | digital-input, digital-output, pwm, dac, adc |
| GPIO27 | SPI MOSI / LoRa MOSI | — | digital-input, digital-output, pwm, adc, touch |
| GPIO34 | LoRa DIO2 | — | digital-input, input-only, adc |
| GPIO35 | LoRa DIO1 | — | digital-input, input-only, adc |

## Where to Buy

- [Heltec Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwireless-bridge%2F&ref=openhardware.directory&product=heltec-wireless-bridge&source=md-export) — 28.90
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-Development-Bluetooth-Compatible-902-928MHz%2Fdp%2FB0D3X2CZRZ&ref=openhardware.directory&product=heltec-wireless-bridge&source=md-export) — 28.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwireless-bridge%2F&ref=openhardware.directory&product=heltec-wireless-bridge&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHeltec-Aaron-Lee%2FWiFi_Kit_series&ref=openhardware.directory&product=heltec-wireless-bridge&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fesp32-series%2Flora-32%2Fwireless-bridge%2Fproduct-usage-guide%2F&ref=openhardware.directory&product=heltec-wireless-bridge&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Bridge%2Fbridge.pdf&ref=openhardware.directory&product=heltec-wireless-bridge&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Bridge%2FSchematic_Diagram_HTIT-WB_V0.2.pdf&ref=openhardware.directory&product=heltec-wireless-bridge&source=md-export)

## Tags

`esp32`, `lora`, `wifi`, `bluetooth`, `bridge`, `meshtastic`, `lorawan`, `heltec`

## Certifications

CE

---
[View full device page](https://openhardware.directory/s/1370/heltec-wireless-bridge)

---

# LILYGO T-Micro32 Plus

> LILYGO T-Micro32 Plus is an upgraded compact ESP32 module with 8MB flash, 2MB PSRAM, expanded GPIO, and an improved RED C3 ceramic antenna for stronger wireless performance.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$6.54
- **CPU:** ESP32
- **RAM:** 520KB SRAM
- **Flash:** 8MB
- **Power:** 3.3V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython
- esphome

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 processor at 240MHz with Wi-Fi 802.11 b/g/n, Bluetooth 4.2 BLE, 520KB SRAM, 8MB flash, and 2MB PSRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-micro32-plus&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **PWM**
- **ADC**
- **DAC**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-micro32-plus&ref=openhardware.directory&product=lilygo-t-micro32-plus&source=md-export) — $6.54

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-micro32-plus&ref=openhardware.directory&product=lilygo-t-micro32-plus&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO&ref=openhardware.directory&product=lilygo-t-micro32-plus&source=md-export)

## Tags

`esp32`, `wifi`, `bluetooth`, `psram`, `compact-module`, `lilygo`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-micro32-plus)

---

# DFRobot FireBeetle 2 ESP32-S3 (N4)

> ESP32-S3 dual-core IoT microcontroller with AI acceleration, WiFi 802.11 b/g/n, BLE 5.0, 26 GPIO pins, 20 ADC channels, USB 2.0 OTG, GDI display interface, lithium battery charging, and stamp-hole PCB design in a 25.4x60mm form factor.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** dev-board
- **Price:** ~$9.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C (OTG)
- **Power:** 5V + LiPo
- **Dimensions:** 25.4 x 60mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-S3-WROOM-1-N4** (mcu): Espressif ESP32-S3-WROOM-1-N4 with Xtensa LX7 dual-core at 240MHz, 512KB SRAM, 4MB flash, WiFi 802.11 b/g/n, BLE 5.0, and AI vector extensions. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-s3-n4&source=md-export)

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2836.html&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-s3-n4&source=md-export) — $9.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2836.html&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-s3-n4&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_DFR1145_FireBeetle_2_Board_ESP32_S3&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-s3-n4&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-s3-n4&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-firebeetle-2-esp32-s3-n4)

---

# D-Robotics RDK X5

> High-performance AI SBC with 10 TOPS NPU, octa-core ARM Cortex-A55, 8GB LPDDR4, WiFi 6, 4x USB 3.0, dual MIPI CSI, CAN FD, and ROS2 support for advanced robotics.

## Quick Facts

- **Brand:** D-Robotics
- **Price:** ~$135
- **CPU:** ARM Cortex-A55 octa-core @ 1.5GHz + 10 TOPS BPU NPU + 32 GFLOPS GPU
- **RAM:** 8GB LPDDR4
- **Flash:** microSD (user-supplied)
- **USB:** 4x USB 3.0 Type-A + USB-C 2.0 (device)
- **Power:** 5V/5A (USB-C or PoE)

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.4 | Ethernet Gigabit

## Components

- **Sunrise-5** (mcu): D-Robotics Sunrise 5 SoC with octa-core ARM Cortex-A55 at 1.5GHz, 10 TOPS BPU neural processing unit, and 32 GFLOPS GPU for edge AI inference. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.d-robotics.cc%2Fen%2Frdkx5&ref=openhardware.directory&product=d-robotics-rdk-x5&source=md-export)

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2944.html&ref=openhardware.directory&product=d-robotics-rdk-x5&source=md-export) — $135.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2944.html&ref=openhardware.directory&product=d-robotics-rdk-x5&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FDFRobotdl%2FDFROBOTDL%2Ftree%2Fmain%2FDFR1239&ref=openhardware.directory&product=d-robotics-rdk-x5&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.d-robotics.cc%2Fen%2Frdkx5&ref=openhardware.directory&product=d-robotics-rdk-x5&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/d-robotics-rdk-x5)

---

# LuckFox Lyra Ultra

> Feature-rich Linux SBC based on Rockchip RK3506B with triple-core ARM Cortex-A7 @ 1.2GHz + Cortex-M0, 512MB DDR3L, 8GB eMMC, 100M Ethernet, optional WiFi 6/BT 5.2, MIPI DSI display, PoE header, and 33 GPIO pins.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** linux-sbc
- **Price:** ~$33.99
- **CPU:** Rockchip RK3506
- **RAM:** 512MB DDR3L
- **Flash:** 8GB eMMC
- **GPIO:** 33 pins
- **USB:** USB-C 2.0
- **Power:** 5V

## Connectivity

Ethernet 10/100 Mbps

## Compatible Firmware

- buildroot

## Components

- **RK3506** (soc): Triple-core ARM Cortex-A7 @ 1.2GHz + Cortex-M0 MCU with built-in audio/video codec — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fuploads%2Fpdf%2F2024.8.9%2FRockchip%2520RK3506%2520Datasheet%2520V1.0-20240729.pdf&ref=openhardware.directory&product=luckfox-lyra-ultra&source=md-export)
- **CH182H2** (ethernet-phy): 10/100M Ethernet PHY chip — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH182.html&ref=openhardware.directory&product=luckfox-lyra-ultra&source=md-export)
- **CH334F** (usb-hub): USB 2.0 hub controller expanding 1 upstream to 4 downstream ports — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH334.html&ref=openhardware.directory&product=luckfox-lyra-ultra&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **PWM**
- **CAN**
- **ADC**
- **MIPI DSI**
- **USB 2.0**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-lyra-ultra.htm&ref=openhardware.directory&product=luckfox-lyra-ultra&source=md-export) — $33.99

## Available Software

- [LuckFox Lyra SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-lyra-ultra&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-lyra-ultra.htm&ref=openhardware.directory&product=luckfox-lyra-ultra&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-lyra-ultra&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Lyra%2F&ref=openhardware.directory&product=luckfox-lyra-ultra&source=md-export)

## Tags

`linux`, `sbc`, `rockchip`, `rk3506`, `arm`, `cortex-a7`, `cortex-m0`, `ethernet`, `mipi-dsi`, `emmc`, `poe`, `wifi6`, `audio-codec`, `multi-core`

---
[View full device page](https://openhardware.directory/s/1370/luckfox-lyra-ultra)

---

# TI SK-AM62-SIP Starter Kit

> Texas Instruments AM62x Sitara SiP ultra-compact evaluation board with 512MB LPDDR4 integrated in-package, microSD, 100Mbps Ethernet, USB-C, and 5V power — the smallest AM62 evaluation platform for space-constrained IoT designs.

## Quick Facts

- **Brand:** Texas Instruments
- **Board Type:** linux-sbc
- **Price:** ~$199
- **CPU:** ti-am62x
- **RAM:** 512MB LPDDR4 (in-package SiP)
- **Flash:** microSD boot
- **USB:** USB-C
- **Power:** 5V

## Connectivity

Ethernet 100Mbps

## Compatible Firmware

- armbian

## Where to Buy

- [TI Store](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FSK-AM62-SIP%2Fpart-details%2FSK-AM62-SIP&ref=openhardware.directory&product=ti-sk-am62-sip&source=md-export) — $199.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fti-sk-am62-sip%2F&ref=openhardware.directory&product=ti-sk-am62-sip&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/ti-sk-am62-sip)

---

# Adafruit QT Py RP2040

> Tiny RP2040-based dev board in the QT Py / Seeed XIAO form factor, featuring 8MB flash, USB-C, a NeoPixel, and a STEMMA QT connector for solderless I2C sensor wiring.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$9.95
- **CPU:** ARM Cortex-M0+ dual-core @ 125 MHz (RP2040)
- **RAM:** 264 KB SRAM
- **Flash:** 8MB SiP
- **Power:** 5V
- **Dimensions:** 21.8 × 17.8 × 5.8 mm

## Compatible Firmware

- circuitpython
- micropython
- arduino
- pico-sdk

## Components

- **RP2040** (mcu): Raspberry Pi dual-core ARM Cortex-M0+ microcontroller at 125 MHz with 264 KB SRAM and PIO state machines. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=adafruit-qt-py-rp2040&source=md-export)
- **W25Q64JV** (flash): 8 MB SPI NOR Flash providing code and data storage for CircuitPython, MicroPython, or Arduino sketches. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.winbond.com%2Fresource-files%2Fw25q64jv%2520revj%252003272018%2520plus.pdf&ref=openhardware.directory&product=adafruit-qt-py-rp2040&source=md-export)
- **WS2812B** (led): Addressable RGB LED with dedicated power-control pin to cut power during sleep. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=adafruit-qt-py-rp2040&source=md-export)

## Protocols

- **I2C**: SDA=GPIO22, SCL=GPIO19
- **I2C (breakout)**: SDA=GPIO4, SCL=GPIO5
- **SPI**: MOSI=GPIO2, MISO=GPIO3, SCK=GPIO4
- **UART**: TX=GPIO6, RX=GPIO7
- **USB**
- **PWM**
- **PIO**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO26 | A0 — ADC0 | — | analog-input, digital-input, digital-output, pwm, touch |
| GPIO27 | A1 — ADC1 | — | analog-input, digital-input, digital-output, pwm, touch |
| GPIO28 | A2 — ADC2 | — | analog-input, digital-input, digital-output, pwm, touch |
| GPIO29 | A3 — ADC3 | — | analog-input, digital-input, digital-output, pwm, touch |
| GPIO4 | SDA — I2C (breakout) | — | digital-input, digital-output, pwm, touch |
| GPIO5 | SCL — I2C (breakout) | — | digital-input, digital-output, pwm, touch |
| GPIO6 | TX — UART | — | digital-input, digital-output, pwm |
| GPIO7 | RX — UART | — | digital-input, digital-output, pwm |
| GPIO2 | MOSI — SPI | — | digital-input, digital-output, pwm, touch |
| GPIO3 | MISO — SPI | — | digital-input, digital-output, pwm, touch |
| GPIO4 | SCK — SPI | — | digital-input, digital-output, pwm, touch |
| GPIO22 | SDA — I2C (STEMMA QT) | — | digital-input, digital-output |
| GPIO19 | SCL — I2C (STEMMA QT) | — | digital-input, digital-output |
| GPIO2 | D2 — GPIO | — | digital-input, digital-output, pwm, touch |
| GPIO3 | D3 — GPIO | — | digital-input, digital-output, pwm, touch |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4900&ref=openhardware.directory&product=adafruit-qt-py-rp2040&source=md-export) — 9.95

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_qtpy_rp2040%2F&ref=openhardware.directory&product=adafruit-qt-py-rp2040&source=md-export)
- [MicroPython](https://openhardware.directory/r?to=https%3A%2F%2Fmicropython.org%2Fdownload%2FRPI_PICO%2F&ref=openhardware.directory&product=adafruit-qt-py-rp2040&source=md-export)
- [Arduino (RP2040 core)](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fearlephilhower%2Farduino-pico&ref=openhardware.directory&product=adafruit-qt-py-rp2040&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4900&ref=openhardware.directory&product=adafruit-qt-py-rp2040&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-QT-Py-RP2040-PCB&ref=openhardware.directory&product=adafruit-qt-py-rp2040&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-qt-py-2040&ref=openhardware.directory&product=adafruit-qt-py-rp2040&source=md-export)
- [pinout](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-qt-py-2040%2Fpinouts&ref=openhardware.directory&product=adafruit-qt-py-rp2040&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=adafruit-qt-py-rp2040&source=md-export)

## Tags

`rp2040`, `qt-py`, `stemma-qt`, `circuitpython`, `micropython`, `usb-c`, `neopixel`, `tiny`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-qt-py-rp2040)

---

# BBC micro:bit v1

> Pocket-sized educational microcontroller with nRF51822, 5×5 LED matrix, accelerometer, magnetometer, Bluetooth LE, 2 buttons, and 19 I/O pins. Designed for teaching coding to children and beginners via MakeCode or MicroPython.

## Quick Facts

- **Brand:** BBC micro:bit
- **Board Type:** dev-board
- **Price:** ~$14.95
- **CPU:** Nordic nRF51822 ARM Cortex-M0
- **RAM:** 16 KB
- **Flash:** 256 KB
- **Power:** 5V via Micro USB or 3V via 2x AAA batteries
- **Dimensions:** 52mm × 42.1mm × 11mm

## Connectivity

Bluetooth Bluetooth 4.0 LE

## Compatible Firmware

- micropython
- arduino

## Components

- **nRF51822** (mcu): ARM Cortex-M0 SoC with integrated Bluetooth 4.0 LE radio at 16 MHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF51822_PS_v3.1.pdf&ref=openhardware.directory&product=bbc-microbit-v1&source=md-export)
- **MMA8652FC** (imu): 3-axis 12-bit MEMS accelerometer for motion and tilt detection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FMMA8652FC.pdf&ref=openhardware.directory&product=bbc-microbit-v1&source=md-export)
- **MAG3110** (sensor): 3-axis digital magnetometer providing compass heading and magnetic field data. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FMAG3110.pdf&ref=openhardware.directory&product=bbc-microbit-v1&source=md-export)

## Protocols

- **I2C**: SDA=P20, SCL=P19
- **SPI**: MOSI=P15, MISO=P14, SCK=P13
- **UART**: TX=P0, RX=P1
- **Bluetooth LE**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| P0 | GPIO | — | digital-input, digital-output, analog-input, touch |
| P1 | GPIO | — | digital-input, digital-output, analog-input, touch |
| P2 | GPIO | — | digital-input, digital-output, analog-input, touch |
| P8 | GPIO | — | digital-input, digital-output |
| P9 | GPIO | — | digital-input, digital-output |
| P12 | GPIO | — | digital-input, digital-output |
| P13 | SCK | — | digital-input, digital-output |
| P14 | MISO | — | digital-input, digital-output |
| P15 | MOSI | — | digital-input, digital-output |
| P16 | GPIO | — | digital-input, digital-output |
| P19 | SCL | — | digital-input, digital-output |
| P20 | SDA | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3530&ref=openhardware.directory&product=bbc-microbit-v1&source=md-export) — 14.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3530&ref=openhardware.directory&product=bbc-microbit-v1&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3530&ref=openhardware.directory&product=bbc-microbit-v1&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fmicrobit.org%2F&ref=openhardware.directory&product=bbc-microbit-v1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbbcmicrobit&ref=openhardware.directory&product=bbc-microbit-v1&source=md-export)

## Tags

`education`, `kids`, `micropython`, `makecode`, `bluetooth`, `nrf51822`, `led-matrix`, `bbc`, `microbit`, `beginner`

---
[View full device page](https://openhardware.directory/s/1370/bbc-microbit-v1)

---

# Adafruit Feather nRF52840 Sense

> Sensor-rich BLE Feather with Nordic nRF52840 (64MHz Cortex-M4F), 6 onboard sensors (9-DoF IMU, magnetometer, proximity/light, PDM mic, humidity, barometric pressure), 21 GPIO, and FCC/IC/TELEC certified.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** microcontroller-board
- **Price:** ~$39.5
- **CPU:** ARM Cortex-M4F @ 64MHz (Nordic nRF52840)
- **RAM:** 256KB SRAM
- **Flash:** 1MB Flash
- **Power:** 5V via USB or 3.7V LiPo
- **Dimensions:** 51 x 23 x 7.2mm

## Connectivity

WiFi false | Bluetooth Bluetooth 5.0 BLE (nRF52840) | Zigbee false | Ethernet false

## Compatible Firmware

- circuitpython
- arduino

## Components

- **nRF52840** (mcu): Nordic Semiconductor nRF52840 ARM Cortex-M4F @ 64MHz, 1MB Flash, 256KB RAM, Bluetooth 5.0, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52840_PS_v1.7.pdf&ref=openhardware.directory&product=adafruit-feather-nrf52840-sense&source=md-export)
- **LSM6DS3TR-C** (mcu): ST LSM6DS3TR-C 3-axis accelerometer + 3-axis gyroscope, I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flsm6ds3tr-c.pdf&ref=openhardware.directory&product=adafruit-feather-nrf52840-sense&source=md-export)
- **LIS3MDL** (mcu): ST LIS3MDL 3-axis magnetometer for compass and magnetic field sensing. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flis3mdl.pdf&ref=openhardware.directory&product=adafruit-feather-nrf52840-sense&source=md-export)
- **APDS9960** (mcu): Broadcom APDS9960 proximity, RGB, ambient light, and gesture sensor. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.broadcom.com%2Fdoc%2FAV02-4191EN&ref=openhardware.directory&product=adafruit-feather-nrf52840-sense&source=md-export)
- **BMP280** (mcu): Bosch BMP280 barometric pressure, temperature, and altitude sensor. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FBST-BMP280-DS001-11.pdf&ref=openhardware.directory&product=adafruit-feather-nrf52840-sense&source=md-export)
- **SHT31-D** (mcu): Sensirion SHT31-D digital humidity and temperature sensor, I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F2857%2FSensirion_Humidity_SHT3x_Datasheet_digital-767294.pdf&ref=openhardware.directory&product=adafruit-feather-nrf52840-sense&source=md-export)

## Protocols

- **I2C**: SDA=GPIO25, SCL=GPIO26
- **SPI**: MOSI=GPIO15, MISO=GPIO14, SCK=GPIO12
- **UART**: TX=GPIO6, RX=GPIO8
- **I2S**
- **USB**
- **BLE**
- **PWM**
- **ADC**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO4 | A0 — DAC/ADC | — | analog-input, dac, digital-input, digital-output, pwm |
| GPIO5 | A1 — ADC | — | analog-input, digital-input, digital-output, pwm |
| GPIO30 | A2 — ADC | — | analog-input, digital-input, digital-output |
| GPIO28 | A3 — ADC | — | analog-input, digital-input, digital-output |
| GPIO2 | A4 — ADC | — | analog-input, digital-input, digital-output, pwm |
| GPIO3 | A5 — ADC | — | analog-input, digital-input, digital-output, pwm |
| GPIO27 | D5 — GPIO/PWM | — | digital-input, digital-output, pwm |
| GPIO11 | D6 — GPIO | — | digital-input, digital-output, pwm |
| GPIO7 | D9 — GPIO/PWM | — | digital-input, digital-output, pwm |
| GPIO26 | D10 — GPIO/SCL | — | digital-input, digital-output, pwm |
| GPIO15 | D11 — MOSI | — | digital-input, digital-output |
| GPIO14 | D12 — MISO | — | digital-input, digital-output |
| GPIO12 | D13 — SCK | — | digital-input, digital-output |
| GPIO25 | SDA — I2C | — | digital-input, digital-output |
| GPIO6 | TX — UART | — | digital-input, digital-output |
| GPIO8 | RX — UART | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4516&ref=openhardware.directory&product=adafruit-feather-nrf52840-sense&source=md-export) — 39.5

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4516&ref=openhardware.directory&product=adafruit-feather-nrf52840-sense&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4516&ref=openhardware.directory&product=adafruit-feather-nrf52840-sense&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-sense&ref=openhardware.directory&product=adafruit-feather-nrf52840-sense&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_nRF52_Arduino&ref=openhardware.directory&product=adafruit-feather-nrf52840-sense&source=md-export)

## Tags

`feather`, `nrf52840`, `bluetooth`, `ble`, `sensor`, `imu`, `circuitpython`, `adafruit`, `environmental-monitoring`

## Certifications

RoHS, FCC, CE, TELEC

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-nrf52840-sense)

---

# Adafruit Feather HUZZAH ESP8266

> All-in-one ESP8266 WiFi Feather board at 80 MHz with 802.11 b/g/n, USB-serial (CP2104), LiPo charging, 9 GPIO, and 4MB flash — the easiest way to add WiFi to a portable battery-powered project.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$14.95
- **CPU:** ESP8266 Tensilica L106 @ 80 MHz
- **RAM:** 80 KB
- **Flash:** 4MB
- **Power:** 3.7V LiPo via JST or 5V Micro USB
- **Dimensions:** 51 × 23 × 8 mm

## Connectivity

WiFi 802.11 b/g/n

## Compatible Firmware

- arduino
- micropython
- Tasmota
- esphome
- platformio

## Components

- **ESP8266** (soc): Espressif ESP8266 Tensilica L106 at 80 MHz with full 802.11 b/g/n WiFi, integrated TCP/IP stack, 80KB RAM, 4MB external flash — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2F0a-esp8266ex_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-feather-huzzah-esp8266&source=md-export)
- **CP2104** (usb-serial): Silicon Labs CP2104 USB-to-UART bridge for programming at up to 921600 baud — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2Fcp2104.pdf&ref=openhardware.directory&product=adafruit-feather-huzzah-esp8266&source=md-export)
- **MCP73831** (charger): Microchip MCP73831 100mA LiPo charge management IC with automatic switchover — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F20001984g.pdf&ref=openhardware.directory&product=adafruit-feather-huzzah-esp8266&source=md-export)

## Protocols

- **UART**: TX=GPIO2, RX=GPIO3
- **SPI**: MOSI=GPIO13, MISO=GPIO12, SCK=GPIO14, SS=GPIO15
- **I2C**: SDA=GPIO4, SCL=GPIO5
- **WiFi 802.11 b/g/n**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | GPIO0 / LED / Boot | — | digital-input, digital-output |
| GPIO2 | GPIO2 / LED / TX | — | digital-input, digital-output |
| GPIO4 | SDA | — | digital-input, digital-output |
| GPIO5 | SCL | — | digital-input, digital-output |
| GPIO12 | MISO | — | digital-input, digital-output |
| GPIO13 | MOSI | — | digital-input, digital-output |
| GPIO14 | SCK | — | digital-input, digital-output |
| GPIO15 | SS | — | digital-input, digital-output |
| GPIO16 | GPIO16 / WAKE | — | digital-input, digital-output |
| ADC | ADC / A0 | — | analog-input |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2821&ref=openhardware.directory&product=adafruit-feather-huzzah-esp8266&source=md-export) — 14.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2821&ref=openhardware.directory&product=adafruit-feather-huzzah-esp8266&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-huzzah-esp8266&ref=openhardware.directory&product=adafruit-feather-huzzah-esp8266&source=md-export)

## Tags

`feather`, `esp8266`, `wifi`, `iot`, `lipo`, `adafruit`, `huzzah`, `nodemcu`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-huzzah-esp8266)

---

# Adafruit QT Py ESP32-C3

> Tiny RISC-V ESP32-C3 dev board in the QT Py / Seeed XIAO footprint with 4 MB flash, WiFi, BLE 5 with Mesh, STEMMA QT, 13 GPIO, 5 ADC inputs, and USB-C — no native USB.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$9.95
- **CPU:** RISC-V single-core @ 160 MHz (ESP32-C3)
- **RAM:** 400 KB SRAM
- **Flash:** 4MB
- **Power:** 5V
- **Dimensions:** 22 × 17.8 × 5.7 mm

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth Bluetooth 5.0 + Mesh

## Compatible Firmware

- circuitpython
- micropython
- arduino
- esp-idf

## Components

- **ESP32-C3** (mcu): Espressif ESP32-C3 single-core 160 MHz RISC-V with 4 MB Flash, 400 KB SRAM, WiFi, and BLE 5 with Mesh. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-qt-py-esp32-c3&source=md-export)

## Protocols

- **I2C**: SDA=GPIO5 (breakout) / GPIO1 (STEMMA QT), SCL=GPIO6 (breakout) / GPIO0 (STEMMA QT)
- **SPI**: SCK=GPIO6, MOSI=GPIO7, MISO=GPIO8
- **UART**: TX=GPIO20, RX=GPIO21
- **PWM**
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | A0 / NeoPixel Data (shared) | — | adc, digital-input, digital-output, pwm |
| GPIO3 | A1 — Analog Input (ADC1_CH3) | — | adc, digital-input, digital-output, pwm |
| GPIO4 | A2 — Analog Input (ADC1_CH4) | — | adc, digital-input, digital-output, pwm |
| GPIO5 | A3 / SDA — Analog Input / I2C Data (shared) | — | adc, digital-input, digital-output, pwm |
| GPIO6 | SCK / SCL — SPI Clock / I2C Clock (shared) | — | digital-input, digital-output, pwm |
| GPIO7 | MOSI / D1 — SPI Data Out | — | digital-input, digital-output, pwm |
| GPIO8 | MISO / D0 — SPI Data In / NeoPixel Power | — | digital-input, digital-output, pwm |
| GPIO0 | SCL — STEMMA QT I2C Clock | — | digital-input, digital-output, pwm |
| GPIO1 | SDA — STEMMA QT I2C Data | — | digital-input, digital-output, pwm |
| GPIO20 | TX — UART0 Transmit | — | digital-input, digital-output, pwm |
| GPIO21 | RX — UART0 Receive | — | digital-input, digital-output, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5405&ref=openhardware.directory&product=adafruit-qt-py-esp32-c3&source=md-export) — 9.95

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_qtpy_esp32c3%2F&ref=openhardware.directory&product=adafruit-qt-py-esp32-c3&source=md-export)
- [Arduino ESP32](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Farduino-esp32&ref=openhardware.directory&product=adafruit-qt-py-esp32-c3&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5405&ref=openhardware.directory&product=adafruit-qt-py-esp32-c3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-QT-Py-ESP32-C3-PCB&ref=openhardware.directory&product=adafruit-qt-py-esp32-c3&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-qt-py-esp32-c3&ref=openhardware.directory&product=adafruit-qt-py-esp32-c3&source=md-export)

## Tags

`esp32-c3`, `risc-v`, `qt-py`, `stemma-qt`, `circuitpython`, `wifi`, `ble`, `tiny`, `xiao-compatible`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-qt-py-esp32-c3)

---

# CubeCell Dev-Board Plus (HTCC-AB02)

> Heltec CubeCell HTCC-AB02 is an ultra-low-power LoRa/LoRaWAN development board based on the ASR6502 SoC (ARM Cortex-M0+ with integrated SX1262), featuring a 0.96" OLED display, solar panel input, and lithium battery management. Ideal for long-range IoT sensor nodes and agricultural monitoring.

## Quick Facts

- **Brand:** Heltec Automation
- **Price:** ~$15.5
- **CPU:** ARM Cortex-M0,single-core @ 48MHz
- **RAM:** 16KB SRAM
- **Flash:** 128KB
- **USB:** Micro-USB (CP2102)
- **Power:** 5V Micro-USB,3.7V LiPo,5.5-7V Solar
- **Dimensions:** 51.9 × 25 × 8mm

## Components

- **ASR6502** (mcu): 48MHz ARM Cortex-M0+ MCU (PSoC 4000 series) with integrated SX1262 LoRa transceiver, 128KB flash, 16KB SRAM, 8-channel DMA, and ultra-low-power design with 3.5uA deep sleep. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02%2FAB02.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export)
- **SX1262** (radio): Semtech SX1262 long-range, low-power sub-GHz RF transceiver supporting LoRa and (G)FSK modulation, 150-960MHz ISM bands, +22dBm TX power, -135dBm receive sensitivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F6%2Fb%2F5%2F1%2F4%2FSX1262_datasheet.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export)
- **SSD1306** (display-driver): Solomon Systech SSD1306 OLED driver IC controlling the built-in 0.96-inch 128x64 monochrome OLED display, connected via I2C (SDA0/SCL0). Used for debugging info, battery status, and sensor readout. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export)
- **CP2102** (usb-uart): Silicon Labs CP2102 single-chip USB-to-UART bridge providing serial programming and debug interface via Micro-USB connector. Royalty-free VCP drivers available for Windows, Mac, and Linux. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export)
- **Solar Input** (battery-charger): Integrated lithium battery management system with charge/discharge control, overcharge protection, battery voltage detection (VBAT_ADC), and automatic USB/battery/solar power switching. Supports 5.5-7V solar panel input. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02%2FHTCC-AB02_SchematicDiagram.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export)

## Protocols

- **I2C** (I2C0): SDA=GPIO (Pin 40 / SDA0), SCL=GPIO (Pin 39 / SCL0)
- **I2C** (I2C1): SDA=GPIO9 (Pin 37 / SDA1), SCL=GPIO8 (Pin 36 / SCL1)
- **SPI** (SPI0): MISO=Pin 26 / MISO0, MOSI=Pin 25 / MOSI0, CLK=Pin 27 / CLK0, NSS=Pin 28 / NSS0
- **SPI** (SPI1): MISO=GPIO2 (Pin 9 / MISO1), MOSI=GPIO1 (Pin 8 / MOSI1), CLK=GPIO3 (Pin 10 / CLK1), NSS=Any GPIO
- **UART** (UART1): TX=Pin 18 / TX1, RX=Pin 17 / RX1
- **UART** (UART2): TX=Pin 30 / TX2, RX=Pin 29 / RX2
- **SWD**: SWDIO=SWD data, SWCLK=SWD clock
- **LoRa**: MISO=Pin 26, MOSI=Pin 25, CLK=Pin 27, NSS=Pin 28

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | MOSI1 — SPI1 Master Out | — | digital-input, digital-output |
| GPIO2 | MISO1 — SPI1 Master In | — | digital-input, digital-output |
| GPIO3 | CLK1 / PWM1 — SPI1 Clock / PWM Output | — | digital-input, digital-output, pwm |
| GPIO4 | PWM2 — PWM Output | — | digital-input, digital-output, pwm |
| GPIO5 | General Purpose I/O | — | digital-input, digital-output |
| GPIO6 | General Purpose I/O | — | digital-input, digital-output |
| GPIO7 | General Purpose I/O | — | digital-input, digital-output |
| GPIO8 | SCL1 — I2C1 Clock | — | digital-input, digital-output |
| GPIO9 | SDA1 — I2C1 Data | — | digital-input, digital-output |
| GPIO10 | OLED Reset | — | digital-input, digital-output |
| GPIO11 | General Purpose I/O | — | digital-input, digital-output |
| GPIO12 | General Purpose I/O | — | digital-input, digital-output |
| GPIO13 | RGB LED Output | — | digital-input, digital-output |
| GPIO14 | General Purpose I/O | — | digital-input, digital-output |
| GPIO15 | Vext Control — External 3.3V Power Switch | — | digital-output |
| GPIO16 | VBAT_ADC Control / USER Button | — | digital-input, digital-output |
| ADC1 | 12-bit Analog Input / Power Detection | — | adc, digital-input |
| ADC2 | 12-bit Analog Input | — | adc, digital-input |
| ADC3 | 12-bit Analog Input | — | adc, digital-input |

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhtcc-ab02%2F&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export) — 15.50
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-Development-HTCC-AB02-Compatible-902-928MHz%2Fdp%2FB0D4MBYV63&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export) — 24.99
- [Parley Labs](https://openhardware.directory/r?to=https%3A%2F%2Fparleylabs.com%2Fcubecell-dev-board-plus-htcc-ab02-us915%2F&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export) — 25.94

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhtcc-ab02%2F&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FCubeCell-Arduino&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.org%2Fen%2Fnode%2Fasr650x%2Fhtcc_ab02%2Findex.html&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02%2FAB02.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02%2FHTCC-AB02_SchematicDiagram.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export)

## Tags

`lora`, `lorawan`, `iot`, `cubecell`, `asr6502`, `sx1262`, `heltec`, `solar`, `oled`, `low-power`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/heltec-cubecell-htcc-ab02)

---

# LILYGO T-OI Plus

> LILYGO T-OI Plus is a compact ESP32-C3 development board with Wi-Fi, BLE 5.0, Grove connectors, and optional 16340 battery holder, designed to fit Sonoff BASICR2 enclosures.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-C3
- **Price:** ~$5.5
- **CPU:** ESP32-C3
- **RAM:** 400KB SRAM
- **Flash:** 4MB
- **USB:** USB Type-C (CH340K)
- **Power:** 5V + Li-Ion 18650

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 5.0 + Mesh

## Compatible Firmware

- arduino
- platformio
- micropython
- esphome

## Components

- **ESP32-C3** (mcu): 32-bit RISC-V single-core processor at 160MHz with Wi-Fi 802.11 b/g/n, Bluetooth 5.0 BLE + Mesh, 400KB SRAM, 4MB flash. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-oi-plus&source=md-export)
- **CH340K** (usb-serial): USB to serial converter chip enabling USB Type-C programming and communication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fdownloads%2FCH340DS1_PDF.html&ref=openhardware.directory&product=lilygo-t-oi-plus&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **PWM**
- **ADC**
- **Grove**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-oi-plus&ref=openhardware.directory&product=lilygo-t-oi-plus&source=md-export) — $5.50

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-oi-plus&ref=openhardware.directory&product=lilygo-t-oi-plus&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGO-T-OI-PLUS&ref=openhardware.directory&product=lilygo-t-oi-plus&source=md-export)

## Tags

`esp32-c3`, `risc-v`, `wifi`, `bluetooth`, `grove`, `battery`, `lilygo`, `iot`, `sonoff-replacement`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-oi-plus)

---

# LILYGO T-Micro32 S3

> LILYGO T-Micro32 S3 is an ultra-compact ESP32-S3FH4R2 module with Wi-Fi, BLE 5.0, 4MB flash, 2MB PSRAM, and dual-core Xtensa LX7 processor in a minimal footprint.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$4.76
- **CPU:** ESP32-S3FH4R2
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **Power:** 3.3V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- platformio
- micropython
- esphome

## Components

- **ESP32-S3FH4R2** (mcu): Dual-core Xtensa LX7 at 240MHz with Wi-Fi 802.11 b/g/n, Bluetooth 5.0 LE, USB OTG, vector instructions, 4MB flash, 2MB PSRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-micro32-s3&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **PWM**
- **ADC**
- **USB OTG**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-micro32-s3&ref=openhardware.directory&product=lilygo-t-micro32-s3&source=md-export) — $4.76

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-micro32-s3&ref=openhardware.directory&product=lilygo-t-micro32-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO&ref=openhardware.directory&product=lilygo-t-micro32-s3&source=md-export)

## Tags

`esp32-s3`, `wifi`, `bluetooth`, `psram`, `compact-module`, `lilygo`, `iot`, `usb-otg`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-micro32-s3)

---

# LILYGO T-A7608E-H

> ESP32-WROVER-E development board with A7608E-H LTE Cat-1 modem supporting voice, SMS, GPS, and multi-band LTE-FDD/TDD connectivity for Europe with 18650 battery support.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$34.99
- **CPU:** ESP32-WROVER-E
- **RAM:** 520 KB
- **Flash:** 4MB
- **USB:** USB-C (CH9102)
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf

## Components

- **ESP32-WROVER-E** (mcu): Dual-core 240 MHz Xtensa LX6 MCU with 4 MB flash and 8 MB PSRAM, integrated Wi-Fi 802.11 b/g/n and Bluetooth 4.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-a7608e-h&source=md-export)
- **A7608E-H** (cellular-modem): SIMCOM A7608E-H LTE Cat-1 modem with multi-band LTE-TDD/FDD, UMTS/HSPA+, GSM/GPRS/EDGE support and integrated GPS/GNSS for Europe frequency bands. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ai-thinker.com%2Fpro_view-58.html&ref=openhardware.directory&product=lilygo-t-a7608e-h&source=md-export)
- **CH9102** (usb-bridge): WCH CH9102 USB-to-TTL serial converter for USB programming and debugging. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH9102.html&ref=openhardware.directory&product=lilygo-t-a7608e-h&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **SDIO**
- **I2S**
- **CAN**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official Store](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-a7608e-h&ref=openhardware.directory&product=lilygo-t-a7608e-h&source=md-export) — $34.99

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-a7608e-h&ref=openhardware.directory&product=lilygo-t-a7608e-h&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-Modem-Series&ref=openhardware.directory&product=lilygo-t-a7608e-h&source=md-export)

## Tags

`esp32`, `4g`, `lte`, `a7608`, `cellular`, `gps`, `iot`, `lilygo`, `voice`, `sms`, `umts`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-a7608e-h)

---

# LILYGO T-Relay 5V 8-Channel

> ESP32-WROVER-E development board with 8 optocoupler-isolated 5V relay channels (HRS4H-S-DC5V), Wi-Fi, BLE 4.2, 8MB PSRAM, and support for DC 12–24V power input for industrial automation.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$15.99
- **CPU:** ESP32-WROVER-E
- **Flash:** 4MB
- **Power:** 12-24V DC

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf
- platformio
- esphome

## Components

- **ESP32-WROVER-E** (mcu): ESP32 module with 4MB Flash, 8MB PSRAM, integrated Wi-Fi b/g/n and BLE 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-relay-5v-8-channel&source=md-export)
- **HRS4H-S-DC5V** (relay): 8-channel 5V coil relay with optocoupler isolation; switches AC 250V/DC 28V; LED indicator per channel — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.datasheetcafe.com%2Fhrs4h-datasheet-relay%2F&ref=openhardware.directory&product=lilygo-t-relay-5v-8-channel&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **CAN**
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| IO33 | — | — | — |
| IO32 | — | — | — |
| IO13 | — | — | — |
| IO12 | — | — | — |
| IO21 | — | — | — |
| IO19 | — | — | — |
| IO18 | — | — | — |
| IO05 | — | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-relay-5v-8-channel-relay&ref=openhardware.directory&product=lilygo-t-relay-5v-8-channel&source=md-export) — $15.99

## Available Software

- [Arduino IDE](https://openhardware.directory/r?to=https%3A%2F%2Fwww.arduino.cc%2F&ref=openhardware.directory&product=lilygo-t-relay-5v-8-channel&source=md-export)
- [ESPHome](https://openhardware.directory/r?to=https%3A%2F%2Fesphome.io%2F&ref=openhardware.directory&product=lilygo-t-relay-5v-8-channel&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-relay-5v-8-channel-relay&ref=openhardware.directory&product=lilygo-t-relay-5v-8-channel&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T-Relay&ref=openhardware.directory&product=lilygo-t-relay-5v-8-channel&source=md-export)

## Tags

`esp32`, `relay`, `automation`, `industrial`, `8-channel`, `optocoupler`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-relay-5v-8-channel)

---

# LILYGO T-Zigbee ESP32-C3 TLSR8258

> Dual-MCU Zigbee development board combining ESP32-C3 (WiFi/BLE) and Telink TLSR8258 (Zigbee/BLE Mesh) — both run simultaneously for bridging Zigbee sensor networks to WiFi/cloud platforms.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$6.89
- **CPU:** ESP32-C3 RISC-V @ 160MHz + Telink TLSR8258
- **RAM:** 400KB (ESP32-C3)
- **Flash:** 4MB
- **USB:** USB via T-U2T adapter (optional)
- **Power:** 3.3V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0 | Zigbee Zigbee 3.0 (TLSR8258)

## Compatible Firmware

- arduino
- platformio
- esphome

## Components

- **ESP32-C3** (mcu): Espressif ESP32-C3 RISC-V single-core at 160MHz with 400KB SRAM, 384KB ROM, 2.4GHz WiFi, and Bluetooth 5 LE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-zigbee-esp32-c3-tlsr8258&source=md-export)
- **TLSR8258** (mcu): Telink TLSR8258 ultra-low-power SoC supporting Zigbee, BLE 5 Mesh, Thread, 6LoWPAN, RF4CE, HomeKit, and ANT protocols. — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwiki.telink-semi.cn%2Fwiki%2Fchip-series%2FTLSR825x-Series%2F&ref=openhardware.directory&product=lilygo-t-zigbee-esp32-c3-tlsr8258&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-zigbee-esp32-c3-tlsr8258&ref=openhardware.directory&product=lilygo-t-zigbee-esp32-c3-tlsr8258&source=md-export) — $6.89

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-zigbee-esp32-c3-tlsr8258&ref=openhardware.directory&product=lilygo-t-zigbee-esp32-c3-tlsr8258&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-ZigBee&ref=openhardware.directory&product=lilygo-t-zigbee-esp32-c3-tlsr8258&source=md-export)

## Tags

`esp32-c3`, `tlsr8258`, `zigbee`, `lilygo`, `wifi`, `ble5`, `smart-home`, `dual-mcu`, `thread`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-zigbee-esp32-c3-tlsr8258)

---

# TrackSenger

> Compact Meshtastic-compatible LoRa communicator with push-button keyboard, built around the Heltec Wireless Tracker with ESP32-S3, SX1262 LoRa, GPS, and a 0.96" TFT display for off-grid mesh messaging.

## Quick Facts

- **Brand:** Bobricius
- **Board Type:** dev-board
- **Price:** ~$30.04
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **GPIO:** 7 pins
- **USB:** USB-C
- **Power:** 5V via USB-C / 3.7V Li-Ion battery

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- meshtastic

## Components

- **ESP32-S3** (mcu): Dual-core WiFi & BLE 5.0 MCU — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=tracksenger&source=md-export)
- **SX1262** (radio): LoRa Sub-GHz transceiver (863-928 MHz, +21 dBm TX, -134 dBm sensitivity) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=tracksenger&source=md-export)
- **uc6580** (gps): Dual-band multi-GNSS receiver (GPS, GLONASS, BDS, Galileo, NAVIC, QZSS) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fen.unicore.com%2Fuploads%2Ffile%2FUC6580x-00_Datasheet_EN_R1.5.pdf&ref=openhardware.directory&product=tracksenger&source=md-export)
- **ST7735** (display-driver): 262K-color TFT LCD controller/driver with SPI interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7735.pdf&ref=openhardware.directory&product=tracksenger&source=md-export)

## Protocols

- **SPI**
- **UART**
- **I2C**
- **ADC**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | User button | — | — |
| GPIO1 | Battery ADC (ADC1_CH0) | — | — |
| GPIO3 | VEXT control (HIGH to enable GNSS) | — | — |
| GPIO8 | LoRa SPI NSS (CS) | — | — |
| GPIO9 | LoRa SPI SCK | — | — |
| GPIO10 | LoRa SPI MOSI | — | — |
| GPIO11 | LoRa SPI MISO | — | — |
| GPIO12 | LoRa RST | — | — |
| GPIO13 | LoRa Busy | — | — |
| GPIO14 | LoRa DIO1 | — | — |
| GPIO21 | Display backlight (LED_K) | — | — |
| GPIO33 | GNSS UART RX | — | — |
| GPIO34 | GNSS UART TX | — | — |
| GPIO37 | ADC control | — | — |
| GPIO38 | Display SPI CS | — | — |
| GPIO39 | Display RST | — | — |
| GPIO40 | Display DC | — | — |
| GPIO41 | Display SPI SCLK | — | — |
| GPIO42 | Display SPI MOSI | — | — |
| GPIO43 | Console UART TX | — | — |
| GPIO44 | Console UART RX | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fbobricius%2Ftracksenger-armachat-meshtastic-wifi-lora-bt-gps%2F&ref=openhardware.directory&product=tracksenger&source=md-export) — $9.99–$108.99
- [Lectronz](https://openhardware.directory/r?to=https%3A%2F%2Flectronz.com%2Fproducts%2Ftracksenger-armachat-meshtastic-wifi-lora-bt-gps&ref=openhardware.directory&product=tracksenger&source=md-export) — $30.04

## Available Software

- [Meshtastic](https://openhardware.directory/r?to=https%3A%2F%2Fmeshtastic.org%2F&ref=openhardware.directory&product=tracksenger&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armachat.com%2Ftracksenger-armachat-meshtastic-wifi-lora-bt-gps%2F&ref=openhardware.directory&product=tracksenger&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbobricius%2Farmachat&ref=openhardware.directory&product=tracksenger&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Tracker%2FWireless%2520Tracker1.1.pdf&ref=openhardware.directory&product=tracksenger&source=md-export)

## Tags

`meshtastic`, `lora`, `off-grid`, `mesh-networking`, `gps`, `esp32-s3`, `armachat`, `communicator`, `keyboard`, `heltec`

---
[View full device page](https://openhardware.directory/s/1370/tracksenger)

---

# DFRobot FireBeetle ESP32

> Compact ESP32 IoT microcontroller with dual-core Xtensa LX6 at 240MHz, WiFi 802.11 b/g/n, Bluetooth 4.2, 16MB flash, 520KB SRAM, 10 digital I/O, 5 analog inputs, onboard LiPo charging, 10uA deep sleep, and 250+ tutorials.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** dev-board
- **Price:** ~$8.9
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **USB:** Micro-USB
- **Power:** 5V via Micro-USB or 3.7V LiPo battery
- **Dimensions:** 29 x 58mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Components

- **ESP-WROOM-32** (mcu): Espressif ESP-WROOM-32 with Xtensa LX6 dual-core at 240MHz, 520KB SRAM, 16MB flash, WiFi 802.11 b/g/n, Bluetooth 4.2 BR/EDR + BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-esp32&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D2 | Digital I/O | — | digital-input, digital-output, pwm |
| D3 | Digital I/O | — | digital-input, digital-output, pwm |
| D4 | Digital I/O | — | digital-input, digital-output |
| D5 | Digital I/O | — | digital-input, digital-output, pwm |
| D6 | Digital I/O | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output |
| D8 | Digital I/O | — | digital-input, digital-output |
| D9 | Built-in LED | — | digital-input, digital-output, pwm |
| D10 | Digital I/O | — | digital-input, digital-output |
| D11 | Digital I/O | — | digital-input, digital-output |
| A0 | Analog In | — | digital-input, digital-output, adc |
| A1 | Analog In | — | digital-input, digital-output, adc |
| A2 | Analog In | — | digital-input, digital-output, adc |
| A3 | Analog In | — | digital-input, digital-output, adc |
| A4 | Analog In | — | digital-input, digital-output, adc |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1590.html&ref=openhardware.directory&product=dfrobot-firebeetle-esp32&source=md-export) — $8.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1590.html&ref=openhardware.directory&product=dfrobot-firebeetle-esp32&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FFireBeetle_ESP32_IOT_Microcontroller%28V3.0%29__Supports_Wi-Fi_%26_Bluetooth__SKU__DFR0478&ref=openhardware.directory&product=dfrobot-firebeetle-esp32&source=md-export)

## Certifications

FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-firebeetle-esp32)

---

# Olimex ESP32-C6-DevKit-Lipo

> Breadboard-friendly open-source ESP32-C6 dev board with WiFi 6, Thread, Zigbee, BLE 5, built-in LiPo charger, and dual USB-C — all for under €9.

## Quick Facts

- **Brand:** Olimex
- **Board Type:** dev-board
- **Price:** ~$9.5
- **CPU:** RISC-V single-core @ 160MHz
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** 2× USB-C (serial + native JTAG)
- **Power:** USB-C or LiPo battery
- **Dimensions:** 45 × 25.4mm

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.3 | Zigbee Zigbee 3.0

## Compatible Firmware

- arduino
- esp-idf
- esphome
- tasmota
- platformio

## Components

- **ESP32-C6-MINI-1-N4** (mcu): Espressif ESP32-C6-MINI-1-N4 module with RISC-V @ 160MHz, 4MB flash, WiFi 6, BLE 5.3, and IEEE 802.15.4 for Thread/Zigbee/Matter. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6-mini-1_mini-1u_datasheet_en.pdf&ref=openhardware.directory&product=olimex-esp32-c6-devkit-lipo&source=md-export)
- **battery-charger** (battery-charger): Onboard single-cell LiPo charger with battery status indicator LED. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FOLIMEX%2FESP32-C6-DevKit-Lipo&ref=openhardware.directory&product=olimex-esp32-c6-devkit-lipo&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **UEXT**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | GPIO 0 | — | digital-input, digital-output, adc |
| GPIO1 | GPIO 1 | — | digital-input, digital-output, adc |
| GPIO2 | GPIO 2 | — | digital-input, digital-output, adc |
| GPIO3 | GPIO 3 | — | digital-input, digital-output, adc |
| GPIO4 | GPIO 4 / SDA | — | digital-input, digital-output |
| GPIO5 | GPIO 5 / SCL | — | digital-input, digital-output |
| GPIO6 | GPIO 6 / SPI CS | — | digital-input, digital-output |
| GPIO7 | GPIO 7 / SPI MOSI | — | digital-input, digital-output |
| GPIO8 | GPIO 8 | — | digital-input, digital-output |
| GPIO9 | GPIO 9 / BOOT | — | digital-input, digital-output, strapping |
| GPIO10 | GPIO 10 / SPI MISO | — | digital-input, digital-output |
| GPIO11 | GPIO 11 / SPI CLK | — | digital-input, digital-output |
| GPIO12 | GPIO 12 / UART TX | — | digital-input, digital-output |
| GPIO13 | GPIO 13 / UART RX | — | digital-input, digital-output |
| GPIO14 | GPIO 14 | — | digital-input, digital-output |
| GPIO15 | GPIO 15 | — | digital-input, digital-output |
| GPIO22 | GPIO 22 | — | digital-input, digital-output |
| GPIO23 | GPIO 23 | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Olimex](https://openhardware.directory/r?to=https%3A%2F%2Fwww.olimex.com%2FProducts%2FIoT%2FESP32-C6%2FESP32-C6-DevKit-Lipo%2F&ref=openhardware.directory&product=olimex-esp32-c6-devkit-lipo&source=md-export) — 8.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.olimex.com%2FProducts%2FIoT%2FESP32-C6%2FESP32-C6-DevKit-Lipo%2Fopen-source-hardware&ref=openhardware.directory&product=olimex-esp32-c6-devkit-lipo&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FOLIMEX%2FESP32-C6-DevKit-Lipo&ref=openhardware.directory&product=olimex-esp32-c6-devkit-lipo&source=md-export)

## Tags

`esp32-c6`, `wifi6`, `thread`, `zigbee`, `matter`, `ble`, `open-hardware`, `cern-ohl`, `lipo`, `breadboard`

---
[View full device page](https://openhardware.directory/s/1370/olimex-esp32-c6-devkit-lipo)

---

# DFRobot FireBeetle 2 ESP32-C6

> Low-cost ESP32-C6 IoT board with WiFi 6, BLE 5, Thread, Zigbee, Matter, solar panel charging with MPPT, and ultra-low 16µA deep sleep — for $5.90.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** dev-board
- **Price:** ~$5.9
- **CPU:** RISC-V single-core @ 160MHz
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** USB-C, 5V DC, or solar panel
- **Dimensions:** 25.4 × 60mm

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.0 | Zigbee Zigbee 3.0

## Compatible Firmware

- arduino
- micropython
- esp-idf
- esphome

## Components

- **ESP32-C6** (mcu): Espressif ESP32-C6 with RISC-V @ 160MHz, 512KB SRAM, 4MB flash, WiFi 6, BLE 5, Zigbee, Thread, and Matter support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-c6&source=md-export)
- **solar-mppt-charger** (battery-charger): Integrated solar panel MPPT charging circuit with simultaneous USB/VIN/solar input, 0.5A max charge current, and deep sleep at 16µA. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2Fdfr1075%2F&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-c6&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **I2S**
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | GPIO / ADC | — | digital-input, digital-output, adc, pwm |
| D1 | GPIO / ADC | — | digital-input, digital-output, adc, pwm |
| D2 | GPIO / ADC | — | digital-input, digital-output, adc, pwm |
| D3 | GPIO / ADC | — | digital-input, digital-output, adc, pwm |
| D4 | SDA / GPIO | — | digital-input, digital-output, pwm |
| D5 | SCL / GPIO | — | digital-input, digital-output, pwm |
| D6 | GPIO / ADC | — | digital-input, digital-output, adc |
| D7 | GPIO / ADC | — | digital-input, digital-output, adc |
| D8 | SPI CLK | — | digital-input, digital-output |
| D9 | SPI MISO | — | digital-input |
| D10 | SPI MOSI | — | digital-output |
| D11 | GPIO | — | digital-input, digital-output |
| D12 | UART TX | — | digital-input, digital-output |
| D13 | UART RX | — | digital-input, digital-output |
| D14 | GPIO | — | digital-input, digital-output |
| D15 | GPIO | — | digital-input, digital-output |
| D16 | GPIO | — | digital-input, digital-output |
| D17 | GPIO | — | digital-input, digital-output |
| D18 | GPIO / IR | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2771.html&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-c6&source=md-export) — 5.90

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2771.html&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-c6&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2Fdfr1075%2F&ref=openhardware.directory&product=dfrobot-firebeetle-2-esp32-c6&source=md-export)

## Tags

`esp32-c6`, `wifi6`, `thread`, `zigbee`, `matter`, `ble`, `solar`, `low-power`, `dfrobot`, `firebeetle`

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-firebeetle-2-esp32-c6)

---

# Adafruit METRO M0 Express

> Arduino Uno-compatible development board powered by ATSAMD21G18 Cortex M0+ at 48MHz with 256KB flash, 32KB SRAM, 2MB SPI flash, and CircuitPython pre-loaded. Features Arduino shield compatibility and native USB.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$24.95
- **CPU:** ATSAMD21G18 ARM Cortex M0+
- **RAM:** 32 KB
- **Flash:** 256 KB
- **GPIO:** 25 pins
- **Power:** 7-9V via DC barrel jack or 5V via Micro USB
- **Dimensions:** 71mm × 53mm × 13mm

## Compatible Firmware

- circuitpython
- arduino

## Components

- **ATSAMD21G18** (mcu): 32-bit ARM Cortex M0+ at 48 MHz with 256 KB flash and 32 KB SRAM, hardware native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM-D21DA1-Family-Data-Sheet-DS40001882G.pdf&ref=openhardware.directory&product=adafruit-metro-m0-express&source=md-export)
- **W25Q16FW** (flash): 2 MB SPI NOR flash for CircuitPython code, data logging, and file storage. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.winbond.com%2Fresource-files%2Fw25q16fw%2520revj%252005182017%2520spi.pdf&ref=openhardware.directory&product=adafruit-metro-m0-express&source=md-export)

## Protocols

- **I2C**: SDA=D20, SCL=D21
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, SS=D10
- **UART**: TX=D1, RX=D0
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX | — | digital-input, digital-output |
| D1 | TX | — | digital-input, digital-output |
| D2 | GPIO | — | digital-input, digital-output |
| D3 | GPIO | — | digital-input, digital-output, pwm |
| D4 | GPIO | — | digital-input, digital-output |
| D5 | GPIO | — | digital-input, digital-output, pwm |
| D6 | GPIO | — | digital-input, digital-output, pwm |
| D7 | GPIO | — | digital-input, digital-output |
| D8 | GPIO | — | digital-input, digital-output |
| D9 | GPIO | — | digital-input, digital-output, pwm |
| D10 | SS | — | digital-input, digital-output, pwm |
| D11 | MOSI | — | digital-input, digital-output, pwm |
| D12 | MISO | — | digital-input, digital-output |
| D13 | SCK | — | digital-input, digital-output |
| D20 | SDA | — | digital-input, digital-output |
| D21 | SCL | — | digital-input, digital-output |
| A0 | ADC/DAC | — | digital-input, digital-output, analog-input, dac |
| A1 | ADC | — | digital-input, digital-output, analog-input |
| A2 | ADC | — | digital-input, digital-output, analog-input |
| A3 | ADC | — | digital-input, digital-output, analog-input |
| A4 | ADC | — | digital-input, digital-output, analog-input |
| A5 | ADC | — | digital-input, digital-output, analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3505&ref=openhardware.directory&product=adafruit-metro-m0-express&source=md-export) — 24.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3505&ref=openhardware.directory&product=adafruit-metro-m0-express&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3505&ref=openhardware.directory&product=adafruit-metro-m0-express&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-metro-m0-express&ref=openhardware.directory&product=adafruit-metro-m0-express&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Metro-M0-Express-PCB&ref=openhardware.directory&product=adafruit-metro-m0-express&source=md-export)

## Tags

`circuitpython`, `arduino`, `atsamd21`, `cortex-m0`, `adafruit`, `metro`, `arduino-compatible`, `uno-form-factor`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-metro-m0-express)

---

# BigTreeTech CB2

> Compute module by BigTreeTech powered by Rockchip RK3566 quad-core Cortex-A55 at 1.8GHz, 2GB/4GB LPDDR4, 32GB eMMC, Gigabit Ethernet, WiFi 5 (802.11ac), and Bluetooth 5.2. CM4-form-factor.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Single Board Computer
- **CPU:** Rockchip RK3566 Quad-core Cortex-A55 @ 1.8GHz
- **RAM:** 2GB LPDDR4
- **Flash:** 32GB eMMC
- **GPIO:** 40-pin pins
- **USB:** 3x USB 2.0,1x USB 3.0
- **Power:** 5V/2A

## Connectivity

WiFi true | Bluetooth true | Ethernet true

## Compatible Firmware

- Klipper
- Armbian
- Debian

## Components

- **Rockchip RK3566** (cpu): Rockchip RK3566 quad-core ARM Cortex-A55 @ 1.8GHz with Mali-G52 GPU and 0.8 TOPS NPU — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2021%2F0113%2F1157.html&ref=openhardware.directory&product=bigtreetech-cb2&source=md-export)
- **Mali-G52 1-Core-2EE** (gpu): ARM Mali-G52 1-Core-2EE GPU supporting OpenGL ES 3.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.arm.com%2FProcessors%2FMali-G52&ref=openhardware.directory&product=bigtreetech-cb2&source=md-export)
- **2.4G/5G 802.11 a/b/g/n/ac** (wifi): Integrated dual-band WiFi (802.11ac, up to 433Mbps) and Bluetooth 5.2 combo module — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FCB2&ref=openhardware.directory&product=bigtreetech-cb2&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **PCIe 2.1**
- **MIPI DSI**
- **MIPI CSI**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-pi-2-cb2&ref=openhardware.directory&product=bigtreetech-cb2&source=md-export)

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FCB2&ref=openhardware.directory&product=bigtreetech-cb2&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-pi-2-cb2&ref=openhardware.directory&product=bigtreetech-cb2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.bttwiki.com%2FCB2.html&ref=openhardware.directory&product=bigtreetech-cb2&source=md-export)

## Tags

`single-board-computer`, `klipper`, `3d-printing`, `rockchip-rk3566`, `compute-module`, `cm4-compatible`, `bigtreetech`, `arm-cortex-a55`, `emmc`, `wifi-5`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-cb2)

---

# BigTreeTech Manta E3EZ V1.0

> Klipper-ready 3D printer control board for Ender 3/5 with STM32G0B1 MCU, BTB connector for CM4/CB1, 5 EZ stepper slots, CAN bus, and direct Ender 3 compatibility.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$44.98
- **CPU:** STM32G0B1
- **RAM:** 144KB
- **Flash:** 512KB
- **USB:** USB Type-C
- **Power:** DC 12V or 24V
- **Dimensions:** similar to Ender 3 board

## Compatible Firmware

- Klipper
- Marlin

## Components

- **STM32G0B1** (mcu): STMicroelectronics 32-bit ARM Cortex-M0+ at 64MHz, 512KB Flash, 144KB SRAM with USB and CAN. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32g0b1re.pdf&ref=openhardware.directory&product=bigtreetech-manta-e3ez-v1-0&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**
- **CAN bus**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-manta-e3ez-v1-0-for-ender3-ender3pro-ender5&ref=openhardware.directory&product=bigtreetech-manta-e3ez-v1-0&source=md-export) — $44.98

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FManta-E3EZ&ref=openhardware.directory&product=bigtreetech-manta-e3ez-v1-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-manta-e3ez-v1-0-for-ender3-ender3pro-ender5&ref=openhardware.directory&product=bigtreetech-manta-e3ez-v1-0&source=md-export)

## Tags

`3d-printer`, `control-board`, `stm32`, `stm32g0`, `klipper`, `ez-driver`, `stepper-driver`, `can-bus`, `raspberry-pi-cm4`, `cb1`, `ender3`, `ender-compatible`, `bigtreetech`, `open-source`, `cortex-m0+`, `manta`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-manta-e3ez-v1-0)

---

# LILYGO T-Halow

> ESP32-S3 development board with WiFi HaLow (802.11ah) sub-GHz radio for long-range IoT deployments, plus standard 2.4GHz WiFi, BLE 5.0, microSD, and 18650 battery support.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$26
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + Li-Ion 18650

## Connectivity

WiFi 802.11 b/g/n + 802.11ah (HaLow 900MHz) | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- micropython

## Components

- **ESP32-S3** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi 802.11 b/g/n, and BLE 5.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-halow&source=md-export)

## Protocols

- **SPI**: CLK=GPIO12, MOSI=GPIO11, MISO=GPIO13
- **I2C**: SDA=GPIO4, SCL=GPIO5
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO11 | SPI MOSI | — | digital-input, digital-output |
| GPIO12 | SPI CLK | — | digital-input, digital-output |
| GPIO13 | SPI MISO | — | digital-input, digital-output |
| GPIO4 | I2C SDA | — | digital-input, digital-output |
| GPIO5 | I2C SCL | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-halow&ref=openhardware.directory&product=lilygo-t-halow&source=md-export) — $26.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-halow&ref=openhardware.directory&product=lilygo-t-halow&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Halow&ref=openhardware.directory&product=lilygo-t-halow&source=md-export)

## Tags

`esp32-s3`, `wifi-halow`, `802.11ah`, `long-range`, `iot`, `sub-ghz`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-halow)

---

# LILYGO T7 S3

> Ultra-affordable ESP32-S3 development board with 16MB flash, 8MB PSRAM, USB 3.0, QWIIC/Stemma QT connector, power switch, and breadboard-compatible pinout at under $8.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$7.93
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C (USB 3.0)
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 5.0 + Mesh

## Compatible Firmware

- arduino
- micropython
- esp-idf
- esphome

## Components

- **ESP32-S3-WROOM-1** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi 802.11 b/g/n, and BLE 5.0 with Bluetooth Mesh. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t7-s3&source=md-export)

## Protocols

- **SPI**: CLK=GPIO12, MOSI=GPIO11, MISO=GPIO13
- **I2C**: SDA=GPIO8, SCL=GPIO9
- **UART**: TX=GPIO43, RX=GPIO44

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO8 | I2C SDA (QWIIC) | — | digital-input, digital-output |
| GPIO9 | I2C SCL (QWIIC) | — | digital-input, digital-output |
| GPIO43 | UART TX | — | digital-output |
| GPIO44 | UART RX | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft7-s3&ref=openhardware.directory&product=lilygo-t7-s3&source=md-export) — $7.93

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft7-s3&ref=openhardware.directory&product=lilygo-t7-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T7-S3&ref=openhardware.directory&product=lilygo-t7-s3&source=md-export)

## Tags

`esp32-s3`, `dev-board`, `qwiic`, `usb3`, `lilygo`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t7-s3)

---

# Banana Pi F3

> Banana Pi F3 is a RISC-V single-board computer powered by the SpacemiT K1 octa-core SoC with 4GB/8GB LPDDR4X, 16GB/32GB eMMC, WiFi 6, Bluetooth 5.2, and Gigabit Ethernet.

## Quick Facts

- **Brand:** Banana Pi
- **Board Type:** linux-sbc
- **Price:** ~$74
- **CPU:** SpacemiT K1 (X60)
- **RAM:** 4GB/8GB LPDDR4X
- **Flash:** 16GB/32GB eMMC
- **USB:** USB 3.0 + USB-C
- **Power:** 12V DC barrel jack

## Connectivity

WiFi WiFi 6 (802.11ax) | Bluetooth BT 5.2 | Ethernet Gigabit Ethernet (10/100/1000M)

## Compatible Firmware

- armbian

## Components

- **SpacemiT K1** (soc): SpacemiT K1 (X60) octa-core RISC-V SoC at 1.6GHz with AI acceleration, targeting developer boards and edge computing. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.spacemit.com%2Fdocumentation%3Ftoken%3DDBd4wvqoqi2fiqkiERTcbEDknBh&ref=openhardware.directory&product=bananapi-f3&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Banana Pi](https://openhardware.directory/r?to=https%3A%2F%2Fwww.banana-pi.org%2Fen%2Fbanana-pi-sbcs%2F175.html&ref=openhardware.directory&product=bananapi-f3&source=md-export) — $74.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fbananapi-f3%2F&ref=openhardware.directory&product=bananapi-f3&source=md-export)
- [vendor](https://openhardware.directory/r?to=https%3A%2F%2Fwww.banana-pi.org%2Fen%2Fbanana-pi-sbcs%2F175.html&ref=openhardware.directory&product=bananapi-f3&source=md-export)

## Tags

`banana-pi`, `spacemit`, `k1`, `risc-v`, `sbc`, `linux`, `armbian`, `wifi6`, `bluetooth`, `single-board-computer`, `riscv`

---
[View full device page](https://openhardware.directory/s/1370/bananapi-f3)

---

# Arduino MKR1000

> Compact Arduino board with SAMD21 ARM Cortex-M0+ and ATSAMW25 integrated WiFi (802.11 b/g/n) with cryptochip and SSL support. Built-in LiPo charger, 8 digital I/O, and 7 analog inputs in a slim 65mm form factor.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$44.95
- **CPU:** ATSAMD21G18 ARM Cortex-M0,@ 48 MHz
- **RAM:** 32KB SRAM
- **Flash:** 256KB
- **Power:** 5V via Micro-USB,3.7V LiPo
- **Dimensions:** 65 × 25 × 6 mm

## Connectivity

WiFi 802.11 b/g/n

## Compatible Firmware

- arduino

## Components

- **ATSAMD21G18** (mcu): ARM Cortex-M0+ at 48MHz, 256KB flash, 32KB SRAM, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fimages%2Fproduct-files%2F2772%2Fatmel-42181-sam-d21_datasheet.pdf&ref=openhardware.directory&product=arduino-mkr1000&source=md-export)
- **ATSAMW25** (wifi-module): Integrated ATWINC1500 802.11b/g/n WiFi module with ATECC508A cryptochip for SSL/TLS and secure element. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3156%2FAtmel-42618-SmartConnect-ATSAMW25-MR210PB_Datasheet.pdf&ref=openhardware.directory&product=arduino-mkr1000&source=md-export)

## Protocols

- **SPI**: MOSI=D8, MISO=D10, SCK=D9
- **I2C**: SDA=D11, SCL=D12
- **UART**: TX=D14, RX=D13
- **802.11 b/g/n**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | D0 — GPIO / Interrupt | — | digital-input, digital-output |
| D1 | D1 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D2 | D2 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D3 | D3 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D4 | D4 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D5 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D7 | D7 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D8 | D8 — SPI MOSI | — | digital-input, digital-output |
| D9 | D9 — SPI SCK | — | digital-input, digital-output |
| D10 | D10 — SPI MISO | — | digital-input, digital-output |
| D11 | D11 — I2C SDA | — | digital-input, digital-output |
| D12 | D12 — I2C SCL | — | digital-input, digital-output |
| D13 | D13 — UART RX | — | digital-input, digital-output |
| D14 | D14 — UART TX | — | digital-input, digital-output |
| A0 | A0 — Analog In / DAC | — | analog-input, analog-output |
| A1 | A1 — Analog In | — | analog-input |
| A2 | A2 — Analog In | — | analog-input |
| A3 | A3 — Analog In | — | analog-input |
| A4 | A4 — Analog In | — | analog-input |
| A5 | A5 — Analog In | — | analog-input |
| A6 | A6 — Analog In | — | analog-input |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Farduino-mkr1000-wifi&ref=openhardware.directory&product=arduino-mkr1000&source=md-export) — €39.90
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FABX00011%2F6590529&ref=openhardware.directory&product=arduino-mkr1000&source=md-export) — $40.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FABX00011&ref=openhardware.directory&product=arduino-mkr1000&source=md-export) — $40.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3156&ref=openhardware.directory&product=arduino-mkr1000&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fmkr1000-wifi%2F&ref=openhardware.directory&product=arduino-mkr1000&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3156%2FAtmel-42618-SmartConnect-ATSAMW25-MR210PB_Datasheet.pdf&ref=openhardware.directory&product=arduino-mkr1000&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3156%2FMKR1000-schematic.pdf&ref=openhardware.directory&product=arduino-mkr1000&source=md-export)

## Tags

`arduino`, `mkr`, `wifi`, `samd21`, `arm-cortex-m0`, `atsamw25`, `iot`, `ssl`, `lipo-charger`

---
[View full device page](https://openhardware.directory/s/1370/arduino-mkr1000)

---

# PJRC Teensy 4.1

> High-performance microcontroller with NXP i.MX RT1062 ARM Cortex-M7 @ 600MHz, 1MB RAM, 2MB Flash, 100Mbps Ethernet PHY, SD card, 55 GPIO, dual 480Mbps USB, and 3 CAN Bus. Expanded Teensy 4.0 sibling.

## Quick Facts

- **Brand:** PJRC
- **Board Type:** microcontroller-board
- **Price:** ~$29.95
- **CPU:** ARM Cortex-M7 @ 600MHz (NXP i.MX RT1062)
- **RAM:** 1024KB (512KB tightly coupled)
- **Flash:** 2048KB
- **Power:** 5V via USB Micro-B
- **Dimensions:** 61.0 x 17.8mm

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet 100Mbps Ethernet PHY (built-in, RJ45 via adapter)

## Compatible Firmware

- arduino
- teensyduino

## Components

- **MIMXRT1062DVJ6B** (mcu): NXP i.MX RT1062 ARM Cortex-M7 @ 600MHz, 1MB SRAM, 2MB Flash, 100Mbps Ethernet PHY, HW crypto, RNG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FIMXRT1060CEC.pdf&ref=openhardware.directory&product=pjrc-teensy-4-1&source=md-export)

## Protocols

- **I2C**: SDA=18, SCL=19, SDA1=50, SCL1=51, SDA2=52, SCL2=53
- **SPI**: MOSI=11, MISO=12, SCK=13, MOSI1=44, MISO1=43, SCK1=42
- **UART**: TX1=1, RX1=0, TX2=8, RX2=7
- **CAN**: CTX1=31, CRX1=30, CTX2=35, CRX2=34, CTX3=49, CRX3=48
- **CAN-FD**
- **I2S**
- **SPDIF**
- **USB**
- **Ethernet**
- **PWM**
- **ADC**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| 0 | RX1 — UART1 Receive | — | uart, digital-input, digital-output |
| 1 | TX1 — UART1 Transmit | — | uart, digital-input, digital-output |
| 2 | Digital — PWM | — | digital-input, digital-output, pwm |
| 3 | Digital — PWM | — | digital-input, digital-output, pwm |
| 4 | Digital — PWM | — | digital-input, digital-output, pwm |
| 5 | Digital — PWM | — | digital-input, digital-output, pwm |
| 6 | Digital — PWM / CS | — | digital-input, digital-output, pwm |
| 7 | RX2 — UART2 Receive | — | uart, digital-input, digital-output |
| 8 | TX2 — UART2 Transmit | — | uart, digital-input, digital-output |
| 9 | Digital — PWM / CS | — | digital-input, digital-output, pwm |
| 10 | Digital — PWM / CS (SPI) | — | spi, digital-input, digital-output, pwm |
| 11 | MOSI — SPI MOSI / PWM | — | spi, digital-input, digital-output, pwm |
| 12 | MISO — SPI MISO / PWM | — | spi, digital-input, digital-output, pwm |
| 13 | SCK — SPI Clock / LED | — | spi, digital-input, digital-output |
| 14 | A0 — Analog / UART3 TX | — | adc, digital-input, digital-output, uart |
| 15 | A1 — Analog / UART3 RX | — | adc, digital-input, digital-output, uart |
| 16 | A2 — Analog | — | adc, digital-input, digital-output |
| 17 | A3 — Analog | — | adc, digital-input, digital-output |
| 18 | SDA — I2C0 Data / A4 | — | i2c, adc, digital-input, digital-output |
| 19 | SCL — I2C0 Clock / A5 | — | i2c, adc, digital-input, digital-output |
| 20 | A6 — Analog / RX5 | — | adc, digital-input, digital-output, uart |
| 21 | A7 — Analog / TX5 | — | adc, digital-input, digital-output, uart |
| 22 | A8 — Analog / PWM | — | adc, digital-input, digital-output, pwm |
| 23 | A9 — Analog / PWM | — | adc, digital-input, digital-output, pwm |
| 24 | A10 — Analog / TX6 | — | adc, digital-input, digital-output, uart |
| 25 | A11 — Analog / RX6 | — | adc, digital-input, digital-output, uart |
| 26 | A12 — Analog | — | adc, digital-input, digital-output |
| 27 | A13 — Analog | — | adc, digital-input, digital-output |
| 28 | Digital — PWM / Ethernet | — | digital-input, digital-output, pwm |
| 29 | Digital — PWM / Ethernet | — | digital-input, digital-output, pwm |
| 30 | CRX1 — CAN1 Receive | — | can, digital-input, digital-output |
| 31 | CTX1 — CAN1 Transmit | — | can, digital-input, digital-output |
| 32 | Digital — Analog | — | adc, digital-input, digital-output |
| 33 | Digital — Analog | — | adc, digital-input, digital-output |
| 34 | CRX2 — CAN2 Receive | — | can, digital-input, digital-output |
| 35 | CTX2 — CAN2 Transmit | — | can, digital-input, digital-output |
| 36 | Digital — CS1 | — | digital-input, digital-output |
| 37 | Digital — CS1 | — | digital-input, digital-output |
| 38 | Digital — Ethernet | — | digital-input, digital-output |
| 39 | Digital — Ethernet | — | digital-input, digital-output |
| 40 | Digital — Ethernet | — | digital-input, digital-output |
| 41 | Digital — Ethernet | — | digital-input, digital-output |
| 42 | SCK1 — SPI1 Clock | — | spi, digital-input, digital-output |
| 43 | MISO1 — SPI1 MISO | — | spi, digital-input, digital-output |
| 44 | MOSI1 — SPI1 MOSI | — | spi, digital-input, digital-output |
| 45 | Digital — General Purpose | — | digital-input, digital-output |
| 46 | A17 — Analog | — | adc, digital-input, digital-output |
| 47 | A18 — Analog | — | adc, digital-input, digital-output |
| 48 | CRX3 — CAN3 Receive | — | can, digital-input, digital-output |
| 49 | CTX3 — CAN3 Transmit | — | can, digital-input, digital-output |
| 50 | SDA1 — I2C1 Data | — | i2c, digital-input, digital-output |
| 51 | SCL1 — I2C1 Clock | — | i2c, digital-input, digital-output |
| 52 | SDA2 — I2C2 Data | — | i2c, digital-input, digital-output |
| 53 | SCL2 — I2C2 Clock | — | i2c, digital-input, digital-output |
| 54 | A0 (alt) — Analog | — | adc, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4622&ref=openhardware.directory&product=pjrc-teensy-4-1&source=md-export) — 29.95
- [PJRC](https://openhardware.directory/r?to=https%3A%2F%2Fwww.pjrc.com%2Fstore%2Fteensy41.html&ref=openhardware.directory&product=pjrc-teensy-4-1&source=md-export) — 29.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4622&ref=openhardware.directory&product=pjrc-teensy-4-1&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4622&ref=openhardware.directory&product=pjrc-teensy-4-1&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fwww.pjrc.com%2Fteensy%2F&ref=openhardware.directory&product=pjrc-teensy-4-1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FPaulStoffregen%2Fcores&ref=openhardware.directory&product=pjrc-teensy-4-1&source=md-export)

## Tags

`teensy`, `arm`, `cortex-m7`, `nxp`, `imxrt1062`, `ethernet`, `sd-card`, `can-bus`, `audio`, `arduino`, `high-speed`

## Certifications

FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/pjrc-teensy-4-1)

---

# Raspberry Pi 1 Model B

> The Raspberry Pi 1 Model B is the original production Raspberry Pi single-board computer, featuring a Broadcom BCM2835 ARM1176JZF-S at 700MHz, 512MB RAM, 100Mbps Ethernet, 2 USB 2.0 ports, HDMI, 26-pin GPIO header, and an SD card slot — the board that launched the modern SBC revolution.

## Quick Facts

- **Brand:** Raspberry Pi
- **Board Type:** dev-board
- **Price:** ~$35
- **CPU:** BCM2835 ARM1176JZF-S @ 700MHz
- **RAM:** 512 MB SDRAM
- **Flash:** none (boots from SD card)
- **Power:** 5V 1A via Micro-USB
- **Dimensions:** 85mm × 56mm

## Connectivity

Ethernet 100Mbps (LAN9512, via USB hub chip)

## Compatible Firmware

- arduino

## Components

- **BCM2835** (mcu): Broadcom BCM2835 ARM1176JZF-S single-core 32-bit processor at 700MHz with VideoCore IV GPU, 512MB SDRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fbcm2835%2Fbcm2835-peripherals.pdf&ref=openhardware.directory&product=raspberry-pi-1-model-b&source=md-export)
- **LAN9512** (ethernet-controller): Microchip LAN9512 USB 2.0 hub with integrated 10/100 Ethernet controller providing 2× USB ports and Ethernet — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FLAN9512-LAN9512i-Data-Sheet-DS00002396B.pdf&ref=openhardware.directory&product=raspberry-pi-1-model-b&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **GPIO**
- **USB**
- **CSI**
- **DSI**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | GPIO2 | — | GPIO, I2C SDA |
| GPIO3 | GPIO3 | — | GPIO, I2C SCL |
| GPIO7 | GPIO7 | — | GPIO, SPI CS1 |
| GPIO8 | GPIO8 | — | GPIO, SPI CS0 |
| GPIO9 | GPIO9 | — | GPIO, SPI MISO |
| GPIO10 | GPIO10 | — | GPIO, SPI MOSI |
| GPIO11 | GPIO11 | — | GPIO, SPI CLK |
| GPIO14 | GPIO14 | — | GPIO, UART TX |
| GPIO15 | GPIO15 | — | GPIO, UART RX |
| GPIO17 | GPIO17 | — | GPIO |
| GPIO18 | GPIO18 | — | GPIO, PWM |
| GPIO22 | GPIO22 | — | GPIO |
| GPIO23 | GPIO23 | — | GPIO |
| GPIO24 | GPIO24 | — | GPIO |
| GPIO25 | GPIO25 | — | GPIO |
| GPIO27 | GPIO27 | — | GPIO |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit (in starter pack)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F1014&ref=openhardware.directory&product=raspberry-pi-1-model-b&source=md-export) — $104.95 (starter pack)

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F1014&ref=openhardware.directory&product=raspberry-pi-1-model-b&source=md-export)
- [docs](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fbcm2835%2Fbcm2835-peripherals.pdf&ref=openhardware.directory&product=raspberry-pi-1-model-b&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fraspberrypi&ref=openhardware.directory&product=raspberry-pi-1-model-b&source=md-export)

## Tags

`raspberry-pi`, `rpi1`, `model-b`, `bcm2835`, `arm11`, `linux`, `sbc`, `gpio`, `hdmi`, `ethernet`, `historical`

## Certifications

FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/raspberry-pi-1-model-b)

---

# Arduino Nano R4

> The newest Arduino Nano — Renesas RA4M1 ARM Cortex-M4F at 48MHz with 256KB flash, 32KB SRAM, Qwiic connector, RGB LED, castellated pins, and USB-C in an ultra-compact 43×17mm form factor. No wireless, pure embedded power.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$12.2
- **CPU:** ARM Cortex-M4F @ 48MHz, FPU, DSP
- **RAM:** 32KB SRAM
- **Flash:** 256KB,8KB EEPROM
- **USB:** USB-C 2.0 (Full-Speed)
- **Power:** 5V via USB-C or Vin
- **Dimensions:** 43 × 17mm

## Compatible Firmware

- arduino
- micropython

## Components

- **R7FA4M1AB3CFM** (mcu): Renesas RA4M1 ARM Cortex-M4F at 48MHz with FPU, DSP, 256KB flash, 32KB SRAM, 14-bit ADC, 12-bit DAC, CAN 2.0B. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2Fra4m1-datasheet.pdf&ref=openhardware.directory&product=arduino-nano-r4&source=md-export)

## Protocols

- **SPI**: MOSI=D11, MISO=D12, SCK=D13, SS=D10
- **I2C**: SDA=A4, SCL=A5
- **UART**: TX=D1, RX=D0
- **CAN**: CANRX=D4, CANTX=D5

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX | — | digital-input, digital-output |
| D1 | UART TX | — | digital-input, digital-output |
| D2 | Digital I/O | — | digital-input, digital-output |
| D3 | PWM | — | digital-input, digital-output, pwm |
| D4 | CAN RX | — | digital-input, digital-output |
| D5 | CAN TX / PWM | — | digital-input, digital-output, pwm |
| D6 | PWM | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output |
| D8 | Digital I/O | — | digital-input, digital-output |
| D9 | PWM | — | digital-input, digital-output, pwm |
| D10 | SPI SS / PWM | — | digital-input, digital-output, pwm |
| D11 | SPI MOSI / PWM | — | digital-input, digital-output, pwm |
| D12 | SPI MISO | — | digital-input, digital-output |
| D13 | SPI SCK | — | digital-input, digital-output |
| A0 | Analog / DAC | — | digital-input, digital-output, adc, dac |
| A1 | Analog Input | — | digital-input, digital-output, adc |
| A2 | Analog Input | — | digital-input, digital-output, adc |
| A3 | Analog Input | — | digital-input, digital-output, adc |
| A4 | I2C SDA / Analog | — | digital-input, digital-output, adc |
| A5 | I2C SCL / Analog | — | digital-input, digital-output, adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fnano-r4&ref=openhardware.directory&product=arduino-nano-r4&source=md-export) — $12.20
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnano-r4&ref=openhardware.directory&product=arduino-nano-r4&source=md-export) — €13.40
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FABX00142%2F25828340&ref=openhardware.directory&product=arduino-nano-r4&source=md-export) — $14.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FABX00142&ref=openhardware.directory&product=arduino-nano-r4&source=md-export) — $14.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnano-r4&ref=openhardware.directory&product=arduino-nano-r4&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fnano-r4%2F&ref=openhardware.directory&product=arduino-nano-r4&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FABX00142-datasheet.pdf&ref=openhardware.directory&product=arduino-nano-r4&source=md-export)

## Tags

`arduino`, `nano`, `r4`, `renesas`, `arm-cortex-m4`, `qwiic`, `usb-c`, `castellated`

---
[View full device page](https://openhardware.directory/s/1370/arduino-nano-r4)

---

# Pine64 PineNut Model-01S

> Ultra-compact BL602 RISC-V WiFi+BLE5 IoT module in ESP-01S form factor with 8-pin through-hole header. Features 276KB SRAM, 2MB flash, onboard RGB LED, and PCB antenna. Supports Arduino, NuttX, FreeRTOS, and OpenBeken firmware. Priced from $1.99.

## Quick Facts

- **Brand:** Pine64
- **Board Type:** module
- **Price:** ~$1.99
- **CPU:** Bouffalo Lab BL602
- **RAM:** 276 KB SRAM
- **Flash:** 2 MB
- **GPIO:** 5 pins
- **Power:** 3.3V
- **Dimensions:** 14.3 mm × 24.8 mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- nuttx
- freertos
- rust-embedded
- openbeken

## Components

- **BL602** (MCU): 32-bit RISC-V WiFi+BLE5 SoC at 192MHz with 276KB SRAM, 128KB ROM, 2MB flash — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Fdatasheet%2Fpine64%2FBL602_BL604_DS_1.2_en.pdf&ref=openhardware.directory&product=pine64-pinenut-01s&source=md-export)
- **RGB LED** (LED): Tri-color LED — Blue (GPIO11), Green (GPIO14), Red (GPIO17) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2FPinenut%2FPinenut-01S%2520V1.01%2520SCH.pdf&ref=openhardware.directory&product=pine64-pinenut-01s&source=md-export)
- **PCB Trace Antenna** (antenna): Built-in 2.4GHz PCB trace antenna for WiFi and BLE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2FPinenut%2FPinenut-01S%2520V1.01%2520SCH.pdf&ref=openhardware.directory&product=pine64-pinenut-01s&source=md-export)

## Protocols

- **UART0**: TX=GPIO16, RX=GPIO7
- **UART1**: TX=GPIO4, RX=GPIO3
- **I2C**: SDA=GPIO3, SCL=GPIO4

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO3 | UART1 RX / I2C SDA / PWM3 | — | digital-input, digital-output, pwm, i2c, uart |
| GPIO4 | UART1 TX / I2C SCL / ADC CH1 | — | digital-input, digital-output, pwm, adc, i2c, uart |
| GPIO7 | UART0 RX | — | digital-input, digital-output, pwm, uart |
| GPIO8 | Boot mode select | — | digital-input, digital-output |
| GPIO16 | UART0 TX | — | digital-input, digital-output, pwm, uart |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** Apache-2.0

## Where to Buy

- [Pine64 Store](https://openhardware.directory/r?to=https%3A%2F%2Fpine64.com%2Fproduct%2Fpinenut-model01s-wifi-ble5-module%2F&ref=openhardware.directory&product=pine64-pinenut-01s&source=md-export) — $1.99

## Available Software

- [BL IoT SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbouffalolab%2Fbl_iot_sdk&ref=openhardware.directory&product=pine64-pinenut-01s&source=md-export) (SDK)
- [ArduinoCore-bouffalo](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fpine64%2FArduinoCore-bouffalo&ref=openhardware.directory&product=pine64-pinenut-01s&source=md-export) (Framework)
- [OpenBeken](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fopenshwprojects%2FOpenBK7231T_App&ref=openhardware.directory&product=pine64-pinenut-01s&source=md-export) (Firmware)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fpine64.com%2Fproduct%2Fpinenut-model01s-wifi-ble5-module%2F&ref=openhardware.directory&product=pine64-pinenut-01s&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fpine64%2Fbl602-docs&ref=openhardware.directory&product=pine64-pinenut-01s&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.pine64.org%2Fwiki%2FPineCone&ref=openhardware.directory&product=pine64-pinenut-01s&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Fdatasheet%2Fpine64%2FBL602_BL604_DS_1.2_en.pdf&ref=openhardware.directory&product=pine64-pinenut-01s&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2FPinenut%2FPinenut-01S%2520V1.01%2520SCH.pdf&ref=openhardware.directory&product=pine64-pinenut-01s&source=md-export)

## Tags

`risc-v`, `wifi`, `ble`, `iot`, `bl602`, `pine64`, `module`

---
[View full device page](https://openhardware.directory/s/1370/pine64-pinenut-01s)

---

# Pine64 PineNut Model-12S

> BL602 RISC-V WiFi+BLE5 stamp module with 16 castellated pads for SMT integration. Exposes 11 GPIOs with SPI, I2C, UART, SDIO, JTAG, ADC, and DAC. Features 276KB SRAM, 2MB flash, and PCB antenna. Priced from $1.99.

## Quick Facts

- **Brand:** Pine64
- **Board Type:** stamp-module
- **Price:** ~$1.99
- **CPU:** Bouffalo Lab BL602
- **RAM:** 276 KB SRAM
- **Flash:** 2 MB
- **GPIO:** 11 pins
- **Power:** 3.3V
- **Dimensions:** 16 mm × 24 mm × 3.1 mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- nuttx
- freertos
- rust-embedded
- openbeken

## Components

- **BL602** (MCU): 32-bit RISC-V WiFi+BLE5 SoC at 192MHz with 276KB SRAM, 128KB ROM, 2MB flash — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Fdatasheet%2Fpine64%2FBL602_BL604_DS_1.2_en.pdf&ref=openhardware.directory&product=pine64-pinenut-12s&source=md-export)
- **PCB Trace Antenna** (antenna): Built-in 2.4GHz PCB trace antenna for WiFi and BLE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Fdatasheet%2Fpine64%2FBL602_BL604_DS_1.2_en.pdf&ref=openhardware.directory&product=pine64-pinenut-12s&source=md-export)

## Protocols

- **UART0**: TX=GPIO16, RX=GPIO7
- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO17, MISO=GPIO0, SCK=GPIO11, SS=GPIO14
- **JTAG**: TDI=GPIO17, TDO=GPIO11, TMS=GPIO12, TCK=GPIO14

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | SPI MISO / PWM0 / SDIO CLK | — | digital-input, digital-output, pwm, spi, sdio |
| GPIO1 | PWM1 / SDIO CMD | — | digital-input, digital-output, pwm, sdio |
| GPIO2 | PWM2 / SDIO DAT0 | — | digital-input, digital-output, pwm, sdio |
| GPIO3 | I2C SDA / PWM3 / SDIO DAT1 | — | digital-input, digital-output, pwm, i2c, sdio |
| GPIO4 | I2C SCL / ADC CH1 / PWM4 / SDIO DAT2 | — | digital-input, digital-output, pwm, adc, i2c, sdio |
| GPIO5 | ADC CH4 / SDIO DAT3 | — | digital-input, digital-output, adc, sdio |
| GPIO7 | UART0 RX | — | digital-input, digital-output, uart |
| GPIO8 | Boot mode select | — | digital-input, digital-output |
| GPIO11 | SPI SCK / ADC CH10 / JTAG TDO | — | digital-input, digital-output, adc, spi, jtag |
| GPIO12 | ADC CH0 / JTAG TMS | — | digital-input, digital-output, adc, jtag |
| GPIO14 | SPI SS / ADC CH2 / DAC B / JTAG TCK | — | digital-input, digital-output, adc, dac, spi, jtag |
| GPIO16 | UART0 TX | — | digital-input, digital-output, uart |
| GPIO17 | SPI MOSI / JTAG TDI | — | digital-input, digital-output, spi, jtag |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No
- **License:** Apache-2.0

## Where to Buy

- [Pine64 Store](https://openhardware.directory/r?to=https%3A%2F%2Fpine64.com%2Fproduct%2Fpinenut-model12s-wifi-ble5-stamp%2F&ref=openhardware.directory&product=pine64-pinenut-12s&source=md-export) — $1.99

## Available Software

- [BL IoT SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbouffalolab%2Fbl_iot_sdk&ref=openhardware.directory&product=pine64-pinenut-12s&source=md-export) (SDK)
- [ArduinoCore-bouffalo](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fpine64%2FArduinoCore-bouffalo&ref=openhardware.directory&product=pine64-pinenut-12s&source=md-export) (Framework)
- [OpenBeken](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fopenshwprojects%2FOpenBK7231T_App&ref=openhardware.directory&product=pine64-pinenut-12s&source=md-export) (Firmware)
- [bl602-hal (Rust)](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsipeed%2Fbl602-hal&ref=openhardware.directory&product=pine64-pinenut-12s&source=md-export) (Library)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fpine64.com%2Fproduct%2Fpinenut-model12s-wifi-ble5-stamp%2F&ref=openhardware.directory&product=pine64-pinenut-12s&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fpine64%2Fbl602-docs&ref=openhardware.directory&product=pine64-pinenut-12s&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.pine64.org%2Fwiki%2FPineCone&ref=openhardware.directory&product=pine64-pinenut-12s&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Fdatasheet%2Fpine64%2FBL602_BL604_DS_1.2_en.pdf&ref=openhardware.directory&product=pine64-pinenut-12s&source=md-export)

## Tags

`risc-v`, `wifi`, `ble`, `iot`, `bl602`, `pine64`, `stamp-module`

---
[View full device page](https://openhardware.directory/s/1370/pine64-pinenut-12s)

---

# LILYGO T-SIM7080G S3

> ESP32-S3 development board with SIM7080G NB-IoT/LTE-M/GNSS module, 16MB flash, 8MB PSRAM, 18650 battery support, and USB-C connectivity for low-power IoT applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$29.6
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + Li-Ion 18650

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- esp-idf
- micropython

## Components

- **ESP32-S3R8** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi 802.11 b/g/n and BLE 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-sim7080g-s3&source=md-export)
- **SIM7080G** (cellular-modem): SIMCom SIM7080G supports NB-IoT and LTE-M Cat-M1 on multiple global bands plus integrated GNSS for location tracking — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsimcom.ee%2Fdocuments%2FSIM7080G%2FSIM7080G_Hardware_Design_V1.02.pdf&ref=openhardware.directory&product=lilygo-t-sim7080g-s3&source=md-export)
- **AXP2101** (battery-charger): Power management IC supporting single-cell lithium battery charging with fuel gauge and multiple LDO outputs — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-SIM7080G-S3%2Fblob%2Fmain%2Fdatasheet%2FAXP2101_Datasheet_V1.0_en.pdf&ref=openhardware.directory&product=lilygo-t-sim7080g-s3&source=md-export)

## Where to Buy

- [undefined](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-sim7080-s3&ref=openhardware.directory&product=lilygo-t-sim7080g-s3&source=md-export) — 29.60

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-sim7080-s3&ref=openhardware.directory&product=lilygo-t-sim7080g-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-SIM7080G-S3&ref=openhardware.directory&product=lilygo-t-sim7080g-s3&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-sim7080g-s3)

---

# Flipper Zero

> Portable open-source multi-tool for hardware exploration, combining Sub-GHz, NFC, RFID 125kHz, infrared, iButton, BLE, and GPIO in a pocket-sized device with a 1.4" monochrome LCD.

## Quick Facts

- **Brand:** Flipper Devices
- **Board Type:** multi-tool
- **Price:** ~$199
- **CPU:** STM32WB55RG ARM Cortex-M4 @ 64MHz + Cortex-M0+ @ 32MHz
- **RAM:** 256KB SRAM
- **Flash:** 1MB
- **GPIO:** 13 pins
- **USB:** USB-C 2.0
- **Power:** USB-C 5V / LiPo 2100mAh

## Connectivity

Bluetooth BLE 5.4

## Compatible Firmware

- flipper-zero-official
- momentum
- unleashed
- roguemaster

## Components

- **STM32WB55RG** (mcu): Dual-core wireless MCU: ARM Cortex-M4 @ 64MHz (application) + ARM Cortex-M0+ @ 32MHz (BLE/802.15.4 radio stack). 1MB flash, 256KB SRAM, hardware AES-256 encryption. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32wb55rg.pdf&ref=openhardware.directory&product=flipper-zero&source=md-export)
- **CC1101** (radio): Texas Instruments low-power sub-1GHz RF transceiver supporting 315/433/868/915 MHz bands with -20dBm TX power. Used for reading and transmitting garage remotes, weather stations, and other sub-GHz protocols. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FCC1101&ref=openhardware.directory&product=flipper-zero&source=md-export)
- **ST25R3916** (nfc-reader): STMicroelectronics high-performance NFC universal device supporting ISO-14443A/B, ISO-15693, FeliCa, NFC Forum T1T-T5T, MIFARE Classic/Ultralight/DESFire, and HID iClass at 13.56MHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fst25r3916.pdf&ref=openhardware.directory&product=flipper-zero&source=md-export)
- **ST7567** (display-driver): Sitronix monochrome LCD controller/driver for the 1.4" 128x64 pixel display. Low-power dot matrix controller with SPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.topwaydisplay.com%2Fsites%2Fdefault%2Ffiles%2F2020-05%2FST7567.pdf&ref=openhardware.directory&product=flipper-zero&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **1-Wire**
- **USB**
- **IR**
- **NFC**
- **Sub-GHz RF**
- **125kHz RFID**
- **iButton 1-Wire**
- **GPIO**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| 1 | — | — | — |
| 2 | — | — | — |
| 3 | — | — | — |
| 4 | — | — | — |
| 5 | — | — | — |
| 6 | — | — | — |
| 7 | — | — | — |
| 8 | — | — | — |
| 9 | — | — | — |
| 10 | — | — | — |
| 11 | — | — | — |
| 12 | — | — | — |
| 13 | — | — | — |
| 14 | — | — | — |
| 15 | — | — | — |
| 16 | — | — | — |
| 17 | — | — | — |
| 18 | — | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No
- **License:** GPL-3.0

## Where to Buy

- [Flipper Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fflipper.net%2Fproducts%2Fflipper-zero&ref=openhardware.directory&product=flipper-zero&source=md-export) — $199.00

## Available Software

- [Flipper Zero Official Firmware](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fflipperdevices%2Fflipperzero-firmware&ref=openhardware.directory&product=flipper-zero&source=md-export)
- [Momentum Firmware](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FNext-Flip%2FMomentum-Firmware&ref=openhardware.directory&product=flipper-zero&source=md-export)
- [Unleashed Firmware](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FDarkFlippers%2Funleashed-firmware&ref=openhardware.directory&product=flipper-zero&source=md-export)
- [RogueMaster Firmware](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FRogueMaster%2Fflipperzero-firmware-wPlugins&ref=openhardware.directory&product=flipper-zero&source=md-export)
- [Flipper App Catalog](https://openhardware.directory/r?to=https%3A%2F%2Flab.flipper.net%2F&ref=openhardware.directory&product=flipper-zero&source=md-export)
- [qFlipper Desktop App](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.flipper.net%2Fqflipper&ref=openhardware.directory&product=flipper-zero&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fflipper.net%2Fproducts%2Fflipper-zero&ref=openhardware.directory&product=flipper-zero&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fflipperdevices%2Fflipperzero-firmware&ref=openhardware.directory&product=flipper-zero&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.flipper.net%2F&ref=openhardware.directory&product=flipper-zero&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.flipper.net%2Fzero%2Fdevelopment%2Fhardware%2Fschematic&ref=openhardware.directory&product=flipper-zero&source=md-export)

## Tags

`flipper-zero`, `multi-tool`, `nfc`, `rfid`, `sub-ghz`, `infrared`, `ibutton`, `ble`, `gpio`, `open-source`, `security-research`, `hardware-hacking`, `stm32`

## Certifications

FCC, CE, IC

---
[View full device page](https://openhardware.directory/s/1370/flipper-zero)

---

# LuckFox PicoKVM

> Compact IP-KVM remote management tool based on RV1106G3, capturing 1080p@60fps HDMI with H.264 encoding at 80-200ms latency. Features 100M Ethernet, USB HID/UMS emulation, Wake-on-LAN, web terminal, and optional 1.54-inch touch display.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** KVM Device
- **Price:** ~$44.99
- **CPU:** ARM Cortex-A7 @ 1.2GHz + RISC-V MCU, 1 TOPS NPU
- **RAM:** 256MB DDR3
- **Flash:** 8GB eMMC
- **USB:** USB-C (power/HID/UMS)
- **Power:** 5V
- **Dimensions:** 48.5 × 48.5 × 29mm (full version)

## Connectivity

Ethernet 10/100 Mbps

## Components

- **RV1106** (soc): Rockchip RV1106G3 SoC handling HDMI video capture, H.264 encoding at 1080p@60fps, and USB HID/UMS device emulation for KVM functionality. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Frockchips.net%2Fwp-content%2Fuploads%2F2025%2F03%2FRockchip-RV1106-Datasheet-V1.7-20231218.pdf&ref=openhardware.directory&product=waveshare-luckfox-picokvm&source=md-export)

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-picokvm.htm&ref=openhardware.directory&product=waveshare-luckfox-picokvm&source=md-export) — 44.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-picokvm.htm&ref=openhardware.directory&product=waveshare-luckfox-picokvm&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-PicoKVM&ref=openhardware.directory&product=waveshare-luckfox-picokvm&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Frockchips.net%2Fwp-content%2Fuploads%2F2025%2F03%2FRockchip-RV1106-Datasheet-V1.7-20231218.pdf&ref=openhardware.directory&product=waveshare-luckfox-picokvm&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-luckfox-picokvm)

---

# LuckFox Lyra Zero W

> Compact Linux SBC based on Rockchip RK3506B with triple-core ARM Cortex-A7 @ 1.2GHz + Cortex-M0, 512MB DDR3L, 256MB NAND Flash, WiFi 6, Bluetooth 5.2, MIPI DSI display, 28 Matrix IO pins, and 40-pin RPi-compatible header.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** linux-sbc
- **Price:** ~$26.99
- **CPU:** Rockchip RK3506
- **RAM:** 512MB DDR3L
- **Flash:** 256MB SPI NAND
- **GPIO:** 28 pins
- **USB:** USB-C 2.0
- **Power:** 5V

## Connectivity

WiFi 2.4GHz WiFi 6 | Bluetooth BLE 5.2

## Compatible Firmware

- buildroot

## Components

- **RK3506** (soc): Triple-core ARM Cortex-A7 @ 1.2GHz + Cortex-M0 MCU with built-in audio/video codec — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fuploads%2Fpdf%2F2024.8.9%2FRockchip%2520RK3506%2520Datasheet%2520V1.0-20240729.pdf&ref=openhardware.directory&product=luckfox-lyra-zero-w&source=md-export)
- **W25N02KV** (flash): 256MB SLC NAND Flash for boot image and rootfs storage — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.winbond.com%2Fhq%2Fproduct%2Fcode-storage-flash-memory%2Fserial-nand-flash%2F%3F__locale%3Den%26partNo%3DW25N02KV&ref=openhardware.directory&product=luckfox-lyra-zero-w&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **PWM**
- **CAN**
- **ADC**
- **MIPI DSI**
- **USB 2.0**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-lyra-zero-w.htm&ref=openhardware.directory&product=luckfox-lyra-zero-w&source=md-export) — $26.99

## Available Software

- [LuckFox Lyra SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-lyra-zero-w&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-lyra-zero-w.htm&ref=openhardware.directory&product=luckfox-lyra-zero-w&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-lyra-zero-w&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Lyra-Zero-W&ref=openhardware.directory&product=luckfox-lyra-zero-w&source=md-export)

## Tags

`linux`, `sbc`, `rockchip`, `rk3506`, `arm`, `cortex-a7`, `cortex-m0`, `wifi6`, `bluetooth`, `mipi-dsi`, `raspberry-pi-hat`, `nand-flash`, `audio-codec`, `multi-core`

---
[View full device page](https://openhardware.directory/s/1370/luckfox-lyra-zero-w)

---

# LuckFox Lyra Plus

> Compact Linux SBC based on Rockchip RK3506G2 with triple-core ARM Cortex-A7 @ 1.2GHz + Cortex-M0, 128MB DDR3L, 256MB NAND Flash, 100M Ethernet, MIPI DSI display output, 24 Rockchip Matrix IO pins, and built-in audio/video codec.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** linux-sbc
- **Price:** ~$22.99
- **CPU:** Rockchip RK3506
- **RAM:** 128MB DDR3L
- **Flash:** 256MB SPI NAND
- **GPIO:** 24 pins
- **USB:** USB-C 2.0
- **Power:** 5V

## Connectivity

Ethernet 10/100 Mbps

## Compatible Firmware

- buildroot

## Components

- **RK3506** (soc): Triple-core ARM Cortex-A7 @ 1.2GHz + Cortex-M0 MCU with built-in audio/video codec — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fuploads%2Fpdf%2F2024.8.9%2FRockchip%2520RK3506%2520Datasheet%2520V1.0-20240729.pdf&ref=openhardware.directory&product=luckfox-lyra-plus&source=md-export)
- **CH182H2** (ethernet-phy): 10/100M Ethernet PHY chip — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH182.html&ref=openhardware.directory&product=luckfox-lyra-plus&source=md-export)
- **W25N02KV** (flash): 256MB SLC NAND Flash for boot image and rootfs storage — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.winbond.com%2Fhq%2Fproduct%2Fcode-storage-flash-memory%2Fserial-nand-flash%2F%3F__locale%3Den%26partNo%3DW25N02KV&ref=openhardware.directory&product=luckfox-lyra-plus&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **PWM**
- **CAN**
- **ADC**
- **MIPI DSI**
- **USB 2.0**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-lyra-plus.htm&ref=openhardware.directory&product=luckfox-lyra-plus&source=md-export) — $22.99

## Available Software

- [LuckFox Lyra SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-lyra-plus&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-lyra-plus.htm&ref=openhardware.directory&product=luckfox-lyra-plus&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-lyra-plus&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Lyra%2F&ref=openhardware.directory&product=luckfox-lyra-plus&source=md-export)

## Tags

`linux`, `sbc`, `rockchip`, `rk3506`, `arm`, `cortex-a7`, `cortex-m0`, `ethernet`, `mipi-dsi`, `nand-flash`, `audio-codec`, `matrix-io`, `multi-core`

---
[View full device page](https://openhardware.directory/s/1370/luckfox-lyra-plus)

---

# Adafruit Metro RP2350 with PSRAM

> The Adafruit Metro RP2350 with PSRAM is an Arduino Uno–footprint development board powered by the RP2350 chip, featuring 16MB flash, 520KB SRAM, and 8MB QSPI PSRAM for expanded dynamic memory — ideal for data-intensive CircuitPython and C/C++ projects.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** rp2350
- **Price:** ~$27.95
- **CPU:** Dual ARM Cortex-M33 or dual RISC-V Hazard3 @ 150MHz (RP2350)
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **USB:** USB-C (native USB)
- **Power:** 5V USB-C or 6–12V DC barrel jack

## Compatible Firmware

- circuitpython
- micropython
- arduino

## Components

- **RP2350** (mcu): Dual-core ARM Cortex-M33 or RISC-V Hazard3 at 150MHz with 520KB SRAM, hardware crypto, and 12 PIO state machines. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=adafruit-metro-rp2350-psram&source=md-export)
- **8MB QSPI PSRAM** (memory): External 8MB QSPI pseudo-static RAM providing additional dynamic memory for data-intensive applications and Python scripting. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6267&ref=openhardware.directory&product=adafruit-metro-rp2350-psram&source=md-export)
- **NeoPixel RGB LED** (led): Adafruit NeoPixel WS2812B addressable RGB LED for status indication and user feedback. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=adafruit-metro-rp2350-psram&source=md-export)

## Protocols

- **I2C**: SDA=GPIO22, SCL=GPIO23
- **SPI**: MOSI=GPIO19, MISO=GPIO20, SCK=GPIO18
- **UART**: TX=GPIO1, RX=GPIO0
- **PWM**
- **PIO**
- **HSTX**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | D0 / RX | — | uart-rx, digital |
| GPIO1 | D1 / TX | — | uart-tx, digital |
| GPIO2 | D2 | — | digital, pwm |
| GPIO3 | D3 | — | digital, pwm |
| GPIO4 | D4 | — | digital, pwm |
| GPIO5 | D5 | — | digital, pwm |
| GPIO6 | D6 | — | digital, pwm |
| GPIO7 | D7 | — | digital, pwm |
| GPIO8 | D8 | — | digital, pwm |
| GPIO9 | D9 | — | digital, pwm |
| GPIO10 | D10 | — | digital, pwm |
| GPIO11 | D11 | — | digital, pwm |
| GPIO12 | D12 | — | digital, pwm |
| GPIO13 | D13 | — | digital, pwm |
| GPIO18 | SCK | — | spi-sck, digital |
| GPIO19 | MOSI | — | spi-mosi, digital |
| GPIO20 | MISO | — | spi-miso, digital |
| GPIO22 | SDA | — | i2c-sda, digital |
| GPIO23 | SCL | — | i2c-scl, digital |
| GPIO26 | A0 | — | analog, digital |
| GPIO27 | A1 | — | analog, digital |
| GPIO28 | A2 | — | analog, digital |
| GPIO29 | A3 | — | analog, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6267&ref=openhardware.directory&product=adafruit-metro-rp2350-psram&source=md-export) — $27.95

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_metro_rp2350%2F&ref=openhardware.directory&product=adafruit-metro-rp2350-psram&source=md-export)
- [Arduino IDE (RP2350 support)](https://openhardware.directory/r?to=https%3A%2F%2Farduino-pico.readthedocs.io%2F&ref=openhardware.directory&product=adafruit-metro-rp2350-psram&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6267&ref=openhardware.directory&product=adafruit-metro-rp2350-psram&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Metro-RP2350-PCB&ref=openhardware.directory&product=adafruit-metro-rp2350-psram&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-metro-rp2350&ref=openhardware.directory&product=adafruit-metro-rp2350-psram&source=md-export)

## Tags

`adafruit`, `metro`, `rp2350`, `psram`, `arduino-footprint`, `circuitpython`, `microcontroller`, `rp2040-successor`

## Certifications

CE, FCC, RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-metro-rp2350-psram)

---

# ESP32-C3 DevKitM-01

> Espressif official RISC-V ESP32-C3 dev board with ESP32-C3-MINI-1 module, 4 MB embedded SPI Flash, WiFi 4, BLE 5, Micro-USB, RGB LED, and a compact footprint for IoT prototyping.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$9.95
- **CPU:** RISC-V single-core @ 160 MHz (ESP32-C3)
- **RAM:** 400 KB SRAM
- **Flash:** 4MB
- **Power:** 5V via Micro USB

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- esp-idf
- arduino
- micropython

## Components

- **ESP32-C3-MINI-1 (C3FN4)** (mcu): Espressif ESP32-C3-MINI-1 module with single-core 160 MHz RISC-V ESP32-C3, 4 MB embedded Flash, WiFi, and BLE 5. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3-mini-1_datasheet_en.pdf&ref=openhardware.directory&product=esp32-c3-devkitm-01&source=md-export)

## Protocols

- **I2C**: SDA=GPIO1, SCL=GPIO2
- **SPI**: SCK=GPIO6, MOSI=GPIO7, MISO=GPIO8
- **UART**: TX=GPIO18, RX=GPIO19
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | GPIO0 | — | ADC, GPIO, touch |
| GPIO1 | GPIO1/SDA | — | I2C, ADC, GPIO, touch |
| GPIO2 | GPIO2/SCL | — | I2C, ADC, GPIO, touch |
| GPIO3 | GPIO3 | — | ADC, GPIO, touch |
| GPIO4 | GPIO4 | — | ADC, GPIO, touch |
| GPIO5 | GPIO5 | — | ADC, GPIO, touch |
| GPIO6 | GPIO6/SCK | — | SPI, GPIO |
| GPIO7 | GPIO7/MOSI | — | SPI, GPIO |
| GPIO8 | GPIO8/MISO | — | SPI, GPIO |
| GPIO9 | GPIO9/BOOT | — | GPIO |
| GPIO10 | GPIO10 | — | GPIO |
| GPIO18 | GPIO18/TX | — | UART, GPIO |
| GPIO19 | GPIO19/RX | — | UART, GPIO |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5337&ref=openhardware.directory&product=esp32-c3-devkitm-01&source=md-export) — 9.95

## Available Software

- [ESP-IDF](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.espressif.com%2Fprojects%2Fesp-idf%2F&ref=openhardware.directory&product=esp32-c3-devkitm-01&source=md-export)
- [Arduino ESP32](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Farduino-esp32&ref=openhardware.directory&product=esp32-c3-devkitm-01&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5337&ref=openhardware.directory&product=esp32-c3-devkitm-01&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp32-c3&ref=openhardware.directory&product=esp32-c3-devkitm-01&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=esp32-c3-devkitm-01&source=md-export)

## Tags

`esp32-c3`, `risc-v`, `devkitm`, `espressif`, `esp-idf`, `wifi`, `ble`, `mini-module`

---
[View full device page](https://openhardware.directory/s/1370/esp32-c3-devkitm-01)

---

# Adafruit Metro RP2350

> Arduino-Uno-compatible board with RP2350, dual ARM Cortex-M33 at 150 MHz, 520KB SRAM, 16MB QSPI flash, microSD, HSTX port, 23 GPIO on headers, NeoPixel, STEMMA QT, and USB-C.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$24.95
- **CPU:** RP2350
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **Power:** 5V via USB-C or 6-17V DC barrel jack

## Compatible Firmware

- circuitpython
- micropython
- C/C++
- arduino

## Components

- **RP2350** (mcu): Dual ARM Cortex-M33 or RISC-V Hazard3 at 150 MHz, 520KB SRAM, 12 PIO, TrustZone. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export)
- **TPS563201** (power): TI TPS563201 synchronous buck converter, 6-17V input, up to 2A at 3.3V. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftps563201.pdf&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export)
- **NeoPixel RGB LED** (led): Onboard addressable RGB NeoPixel. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export)

## Protocols

- **I2C**: SDA=GPIO22, SCL=GPIO23
- **SPI**: MOSI=GPIO19, MISO=GPIO20, SCK=GPIO18
- **UART**: TX=GPIO1, RX=GPIO0
- **HSTX**
- **SWD**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | D0 / RX | — | uart-rx, digital |
| GPIO1 | D1 / TX | — | uart-tx, digital |
| GPIO2 | D2 | — | digital, pwm |
| GPIO3 | D3 | — | digital, pwm |
| GPIO4 | D4 | — | digital, pwm |
| GPIO5 | D5 | — | digital, pwm |
| GPIO6 | D6 | — | digital, pwm |
| GPIO7 | D7 | — | digital, pwm |
| GPIO8 | D8 | — | digital, pwm |
| GPIO9 | D9 | — | digital, pwm |
| GPIO10 | D10 | — | digital, pwm |
| GPIO11 | D11 | — | digital, pwm |
| GPIO12 | D12 | — | digital, pwm |
| GPIO13 | D13 | — | digital, pwm |
| GPIO18 | SCK | — | spi-sck, digital |
| GPIO19 | MOSI | — | spi-mosi, digital |
| GPIO20 | MISO | — | spi-miso, digital |
| GPIO22 | SDA | — | i2c-sda, digital |
| GPIO23 | SCL | — | i2c-scl, digital |
| GPIO26 | A0 | — | analog, digital |
| GPIO27 | A1 | — | analog, digital |
| GPIO28 | A2 | — | analog, digital |
| GPIO29 | A3 | — | analog, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6003&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export) — 24.95

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fdownloads&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export)
- [Pico SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fraspberrypi%2Fpico-sdk&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6003&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-metro-rp2350&ref=openhardware.directory&product=adafruit-metro-rp2350&source=md-export)

## Tags

`adafruit`, `metro`, `rp2350`, `arduino-compatible`, `cortex-m33`, `hstx`, `circuitpython`, `microsd`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-metro-rp2350)

---

# Adafruit Metro M4 Express AirLift

> Arduino Uno-compatible board with ATSAMD51J19 Cortex M4F at 120MHz, ESP32 AirLift WiFi co-processor with TLS/SSL, 512KB flash, 192KB RAM, 2MB QSPI flash, 25 GPIO, dual DAC/ADC, and native USB. Arduino shield compatible.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$34.95
- **CPU:** Microchip ATSAMD51J19 ARM Cortex M4F
- **RAM:** 192 KB
- **Flash:** 512 KB
- **GPIO:** 25 pins
- **Power:** 7-9V DC via barrel jack or 5V via Micro USB
- **Dimensions:** 72mm × 54mm × 15mm

## Connectivity

WiFi 802.11 b/g/n

## Compatible Firmware

- circuitpython
- arduino

## Components

- **ATSAMD51J19** (mcu): 32-bit ARM Cortex M4F at 120 MHz with 512 KB flash, 192 KB SRAM, AES-256, TRNG, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D5xE5x_Family_Data_Sheet_DS60001507G.pdf&ref=openhardware.directory&product=adafruit-metro-m4-airlift&source=md-export)
- **ESP32** (wireless-module): ESP32 acting as WiFi co-processor via SPI, providing 802.11 b/g/n with TLS/SSL support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-metro-m4-airlift&source=md-export)

## Protocols

- **I2C**: SDA=D20, SCL=D21
- **SPI**: MOSI=D23, MISO=D22, SCK=D24, SS=D10
- **UART**: TX=D1, RX=D0
- **USB**
- **I2S**
- **WiFi**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX | — | digital-input, digital-output |
| D1 | TX | — | digital-input, digital-output |
| D2 | GPIO | — | digital-input, digital-output |
| D3 | GPIO | — | digital-input, digital-output, pwm |
| D4 | GPIO | — | digital-input, digital-output |
| D5 | GPIO | — | digital-input, digital-output, pwm |
| D6 | GPIO | — | digital-input, digital-output, pwm |
| D7 | GPIO | — | digital-input, digital-output |
| D8 | GPIO | — | digital-input, digital-output |
| D9 | GPIO | — | digital-input, digital-output, pwm |
| D10 | SS | — | digital-input, digital-output, pwm |
| D11 | MOSI | — | digital-input, digital-output, pwm |
| D12 | MISO | — | digital-input, digital-output |
| D13 | SCK | — | digital-input, digital-output |
| D20 | SDA | — | digital-input, digital-output |
| D21 | SCL | — | digital-input, digital-output |
| D22 | MISO2 | — | digital-input, digital-output |
| D23 | MOSI2 | — | digital-input, digital-output |
| D24 | SCK2 | — | digital-input, digital-output |
| A0 | ADC/DAC | — | digital-input, digital-output, analog-input, dac |
| A1 | ADC/DAC | — | digital-input, digital-output, analog-input, dac |
| A2 | ADC | — | digital-input, digital-output, analog-input |
| A3 | ADC | — | digital-input, digital-output, analog-input |
| A4 | ADC | — | digital-input, digital-output, analog-input |
| A5 | ADC | — | digital-input, digital-output, analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4000&ref=openhardware.directory&product=adafruit-metro-m4-airlift&source=md-export) — 34.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4000&ref=openhardware.directory&product=adafruit-metro-m4-airlift&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4000&ref=openhardware.directory&product=adafruit-metro-m4-airlift&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-metro-m4-express-airlift-wifi&ref=openhardware.directory&product=adafruit-metro-m4-airlift&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Metro-M4-AirLift-Lite-PCB&ref=openhardware.directory&product=adafruit-metro-m4-airlift&source=md-export)

## Tags

`wifi`, `esp32-airlift`, `atsamd51`, `cortex-m4`, `adafruit`, `metro`, `arduino-compatible`, `iot`, `tls-ssl`, `high-performance`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-metro-m4-airlift)

---

# Arduino UNO Q

> Arduino's first Linux-capable UNO — Qualcomm Dragonwing QRB2210 quad-core Cortex-A53 + STM32U585 real-time co-processor, 2GB/4GB RAM, 16GB eMMC, WiFi 5, Bluetooth 5.1, 8×13 LED matrix, USB-C, and AI-ready with Arduino App Lab in the classic UNO form factor.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** sbc
- **Price:** ~$43
- **CPU:** ARM Cortex-A53 quad-core @ 2.0GHz,Cortex-M33 @ 160MHz
- **RAM:** 2GB LPDDR4
- **Flash:** 16GB eMMC
- **USB:** USB-C
- **Power:** 5V via USB-C or Vin
- **Dimensions:** 68.85 × 53.34mm

## Connectivity

WiFi 802.11ac (WiFi 5) | Bluetooth Bluetooth 5.1, BLE

## Compatible Firmware

- arduino
- micropython

## Components

- **QRB2210** (mcu): Qualcomm Dragonwing QRB2210 quad-core ARM Cortex-A53 at 2.0GHz for running Linux OS and AI workloads. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.qualcomm.com%2Fproducts%2Finternet-of-things%2Findustrial%2Fbuilding-enterprise%2Fdragonwing-qrb2210&ref=openhardware.directory&product=arduino-uno-q&source=md-export)
- **STM32U585** (mcu): STMicroelectronics STM32U585 ARM Cortex-M33 at 160MHz handling real-time I/O, GPIO, and Arduino sketch execution. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32u585ai.pdf&ref=openhardware.directory&product=arduino-uno-q&source=md-export)

## Protocols

- **SPI**: MOSI=D11, MISO=D12, SCK=D13, SS=D10
- **I2C**: SDA=A4, SCL=A5
- **UART**: TX=D1, RX=D0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX | — | digital-input, digital-output |
| D1 | UART TX | — | digital-input, digital-output |
| D2 | Digital I/O | — | digital-input, digital-output |
| D3 | PWM | — | digital-input, digital-output, pwm |
| D4 | Digital I/O | — | digital-input, digital-output |
| D5 | PWM | — | digital-input, digital-output, pwm |
| D6 | PWM | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output |
| D8 | Digital I/O | — | digital-input, digital-output |
| D9 | PWM | — | digital-input, digital-output, pwm |
| D10 | SPI SS / PWM | — | digital-input, digital-output, pwm |
| D11 | SPI MOSI / PWM | — | digital-input, digital-output, pwm |
| D12 | SPI MISO | — | digital-input, digital-output |
| D13 | SPI SCK | — | digital-input, digital-output |
| A0 | Analog Input | — | digital-input, digital-output, adc |
| A1 | Analog Input | — | digital-input, digital-output, adc |
| A2 | Analog Input | — | digital-input, digital-output, adc |
| A3 | Analog Input | — | digital-input, digital-output, adc |
| A4 | I2C SDA / Analog | — | digital-input, digital-output, adc |
| A5 | I2C SCL / Analog | — | digital-input, digital-output, adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Funo-q&ref=openhardware.directory&product=arduino-uno-q&source=md-export) — $43.00
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Funo-q&ref=openhardware.directory&product=arduino-uno-q&source=md-export) — €47.58

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Funo-q&ref=openhardware.directory&product=arduino-uno-q&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Funo-q%2F&ref=openhardware.directory&product=arduino-uno-q&source=md-export)

## Tags

`arduino`, `uno-q`, `qualcomm`, `linux`, `ai`, `wifi-5`, `ble`, `stm32`, `usb-c`

---
[View full device page](https://openhardware.directory/s/1370/arduino-uno-q)

---

# Milk-V Meles

> RISC-V SBC with quad-core T-Head TH1520 @ 1.85GHz, up to 16GB LPDDR4X, 4 TOPS NPU, WiFi 5/BT 5.2, 4K HDMI, Vulkan GPU. Credit card-sized form factor.

## Quick Facts

- **Brand:** Milk-V
- **Board Type:** SBC
- **CPU:** T-Head TH1520
- **RAM:** Up to 16GB LPDDR4X
- **Flash:** eMMC slot
- **GPIO:** 40 pins
- **USB:** 4x USB 3.0,1x USB 2.0 Type-C
- **Power:** 5V/4A USB-C

## Connectivity

WiFi WiFi 5 | Bluetooth 5.2 | Ethernet Gigabit

## Components

- **T-Head TH1520** (Processor): 64-bit quad-core C910 RISC-V processor at up to 1.85GHz with integrated NPU, GPU, and video codec — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fmilkv.io%2Fmeles&ref=openhardware.directory&product=milk-v-meles&source=md-export)
- **T-Head NNA** (NPU): General-purpose neural network accelerator delivering 4 TOPS at INT8 precision, operating at 1GHz. Supports Caffe, ONNX, and TensorFlow frameworks — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fmilkv.io%2Fmeles&ref=openhardware.directory&product=milk-v-meles&source=md-export)
- **Imagination GPU** (GPU): 3D GPU at 800MHz delivering 3200 Mpixel/sec with OpenGL ES, OpenCL, and Vulkan support — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fmilkv.io%2Fmeles&ref=openhardware.directory&product=milk-v-meles&source=md-export)

## Protocols

- **MIPI CSI**
- **MIPI DSI**
- **HDMI 2.0**
- **I2C**
- **SPI**
- **UART**
- **I2S**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fmilkv.io%2Fmeles&ref=openhardware.directory&product=milk-v-meles&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fmilkv-meles&ref=openhardware.directory&product=milk-v-meles&source=md-export)

## Tags

`risc-v`, `sbc`, `linux`, `npu`, `ai`, `wifi`, `bluetooth`, `milkv`, `t-head`, `4k`

---
[View full device page](https://openhardware.directory/s/1370/milk-v-meles)

---

# DezKVM Go

> Open-source KVM-over-USB device for controlling headless computers from your laptop. Features HDMI capture up to 1080p 25fps, virtual keyboard/mouse via USB HID, and a browser-based interface requiring no drivers.

## Quick Facts

- **Brand:** imuslab
- **Board Type:** KVM Device
- **Price:** ~$24.99
- **CPU:** No onboard CPU — passive USB hub design with dedicated controller ICs (CH9329, CH340C, MS2109, SL2.1A)
- **RAM:** N/A (no onboard RAM)
- **Flash:** N/A (no onboard flash storage)
- **USB:** 2x USB-C 2.0
- **Power:** 5V 1A via USB
- **Dimensions:** 54 x 17 x 85 mm

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet false

## Components

- **MS2109** (video-capture): Macro Silicon MS2109 USB 2.0 HDMI video capture chip, captures up to 1080p input and outputs UVC-compatible video stream over USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.lcsc.com%2Fproduct-detail%2FUSB-Converters_Macro-Silicon-Technology-MS2109_C3035383.html&ref=openhardware.directory&product=dezkvm-go&source=md-export)
- **SL2.1A** (usb-hub): SL2.1A USB 2.0 hub controller IC, routes the HDMI capture, HID controller, and serial bridge through a single upstream USB-C port. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.lcsc.com%2Fproduct-detail%2FUSB-ICs_CoreChips-Shenzhen-SL2-1A_C126729.html&ref=openhardware.directory&product=dezkvm-go&source=md-export)
- **CH340C** (usb-serial): WCH CH340C USB-to-UART bridge chip, provides serial communication between the host browser (via Web Serial API) and the CH9329 HID controller. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fdownloads%2FCH340DS1_PDF.html&ref=openhardware.directory&product=dezkvm-go&source=md-export)
- **CH9329** (hid-controller): WCH CH9329 UART-to-USB HID chip, receives serial keyboard and mouse commands from the host and emulates a standard USB keyboard and mouse on the target computer. Operates at 115200 baud. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fdownloads%2FCH9329DS1_PDF.html&ref=openhardware.directory&product=dezkvm-go&source=md-export)

## Protocols

- **USB**
- **UART**
- **UVC**
- **USB HID**
- **HTTP**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** GPL-3.0

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Ftobychui%2Fdezkvm-go-kvm-over-usb-device%2F&ref=openhardware.directory&product=dezkvm-go&source=md-export) — $24.99

## Available Software

- [DezKVM Go Server](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ftobychui%2FDezKVM-Go&ref=openhardware.directory&product=dezkvm-go&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Ftobychui%2Fdezkvm-go-kvm-over-usb-device%2F&ref=openhardware.directory&product=dezkvm-go&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ftobychui%2FDezKVM-Go&ref=openhardware.directory&product=dezkvm-go&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ftobychui%2FDezKVM-Go&ref=openhardware.directory&product=dezkvm-go&source=md-export)

## Tags

`kvm`, `kvm-over-usb`, `hdmi-capture`, `open-source-hardware`, `usb-hid`, `headless`, `remote-control`, `browser-based`, `go-lang`, `tindie`

---
[View full device page](https://openhardware.directory/s/1370/dezkvm-go)

---

# Waveshare GPM280

> A portable retro gaming console based on Raspberry Pi Compute Module 3+ Lite with a 2.8-inch IPS display (640x480), 1500mAh battery, Wi-Fi ROM updates, and a compact 136.4x67.5mm form factor.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** game-console
- **Price:** ~$162.95
- **CPU:** BCM2837B0 Cortex-A53
- **RAM:** 1GB
- **Flash:** 32GB TF card
- **Power:** 5V 3A

## Connectivity

WiFi 802.11n | Bluetooth BLE 4.2

## Compatible Firmware

- retropie
- recalbox
- lakka

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwaveshare-gpm280-portable-game-console&ref=openhardware.directory&product=waveshare-gpm280&source=md-export) — $162.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fgpm280.htm&ref=openhardware.directory&product=waveshare-gpm280&source=md-export)

## Tags

`waveshare`, `retro-gaming`, `portable`, `raspberry-pi-cm3`, `game-console`, `ips-display`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-gpm280)

---

# VoltLink CP2102N

> Open source USB-to-serial adapter and ESP32 programmer featuring a genuine Silabs CP2102N chip, USB-C connector, auto-reset circuitry, 3.3V 500mA regulator, and ESD/overcurrent protection.

## Quick Facts

- **Brand:** Voltlog
- **Board Type:** module
- **Price:** ~$19.99
- **CPU:** Silabs CP2102N USB-to-UART Bridge
- **RAM:** N/A
- **Flash:** N/A
- **USB:** USB 2.0 Type-C
- **Power:** 5V

## Components

- **CP2102N** (USB-to-UART Bridge): Silicon Labs CP2102N single-chip USB-to-UART bridge with up to 3 Mbaud data rate, integrated oscillator, and 5V tolerant I/O pins. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2Fcp2102n-datasheet.pdf&ref=openhardware.directory&product=voltlink-cp2102n&source=md-export)

## Protocols

- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fvoltlog%2Fvoltlink-cp2102n-usb-serial-adapter-programmer%2F&ref=openhardware.directory&product=voltlink-cp2102n&source=md-export) — $19.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fvoltlog%2FVoltLink&ref=openhardware.directory&product=voltlink-cp2102n&source=md-export)
- [store](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fvoltlog%2Fvoltlink-cp2102n-usb-serial-adapter-programmer%2F&ref=openhardware.directory&product=voltlink-cp2102n&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fvoltlog%2Fvoltlink-cp2102n-usb-serial-adapter-programmer%2F&ref=openhardware.directory&product=voltlink-cp2102n&source=md-export)

## Tags

`usb-serial`, `programmer`, `esp32`, `cp2102n`, `uart`, `usb-c`, `shelly`, `tasmota`, `esphome`

---
[View full device page](https://openhardware.directory/s/1370/voltlink-cp2102n)

---

# DFRobot EDGE201 DMX512 ESP32-S3 Lighting Controller

> ESP32-S3-based DMX512 lighting programming controller with dual-core architecture, 8 optically isolated inputs, RS485, relay output, WiFi/Bluetooth, and DIN-rail mounting in an alloy steel enclosure. Designed for stage, theater, and venue lighting automation.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** IoT Controller
- **Price:** ~$59
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C (programming)
- **Power:** 12-24V DC (DC2.1 / Terminal Blocks)
- **Dimensions:** 158 x 83 x 37mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-S3** (mcu): Xtensa LX7 dual-core processor at 240MHz with WiFi 802.11 b/g/n and BLE 5.0, handling user programming and wireless communication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-edge201-dmx512-esp32-s3-controller&source=md-export)
- **DMX512 Protocol Processor** (dmx512-controller): Independent DMX512 protocol chip handling real-time lighting control signal generation, communicating with the ESP32-S3 via I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_DFR0944_DMX512_Programming_the_Controller&ref=openhardware.directory&product=dfrobot-edge201-dmx512-esp32-s3-controller&source=md-export)
- **RTC** (rtc): Onboard RTC with ±3 seconds per 30 days accuracy and 12-hour backup power for time-based lighting schedules. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_DFR0944_DMX512_Programming_the_Controller&ref=openhardware.directory&product=dfrobot-edge201-dmx512-esp32-s3-controller&source=md-export)
- **Optocoupler Array** (optocoupler): 8 optically isolated digital input channels compatible with PNP industrial sensors for automated lighting triggers. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_DFR0944_DMX512_Programming_the_Controller&ref=openhardware.directory&product=dfrobot-edge201-dmx512-esp32-s3-controller&source=md-export)
- **Relay** (relay): One relay output (NO/COM) controlled via IO46 for switching high-power external loads. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_DFR0944_DMX512_Programming_the_Controller&ref=openhardware.directory&product=dfrobot-edge201-dmx512-esp32-s3-controller&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | I2C SDA | — | digital-input, digital-output |
| GPIO2 | I2C SCL | — | digital-input, digital-output |
| GPIO4 | GPIO | — | digital-input, digital-output, adc |
| GPIO5 | GPIO | — | digital-input, digital-output, adc |
| GPIO6 | UART TXD / DI1 | — | digital-input, digital-output |
| GPIO7 | DI2 (isolated input) | — | digital-input |
| GPIO8 | UART RXD | — | digital-input, digital-output |
| GPIO18 | DI3 (isolated input) | — | digital-input |
| GPIO21 | BLINK LED | — | digital-output |
| GPIO35 | DI4 (isolated input) | — | digital-input |
| GPIO36 | DI5 (isolated input) | — | digital-input |
| GPIO37 | DI6 (isolated input) | — | digital-input |
| GPIO38 | DI7 (isolated input) | — | digital-input |
| GPIO39 | DI8 (isolated input) | — | digital-input |
| GPIO46 | Relay Control | — | digital-output |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2876.html&ref=openhardware.directory&product=dfrobot-edge201-dmx512-esp32-s3-controller&source=md-export) — $59.00
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproduct-highlight%2Fd%2Fdfrobot%2Fesp32-s3-based-dmx512-smart-lighting-controller&ref=openhardware.directory&product=dfrobot-edge201-dmx512-esp32-s3-controller&source=md-export) — $59.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2876.html&ref=openhardware.directory&product=dfrobot-edge201-dmx512-esp32-s3-controller&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_DFR0944_DMX512_Programming_the_Controller&ref=openhardware.directory&product=dfrobot-edge201-dmx512-esp32-s3-controller&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-edge201-dmx512-esp32-s3-controller)

---

# LuckFox Core1106

> Compact 30x30mm Rockchip RV1106 compute module with ARM Cortex-A7, up to 1 TOPS NPU, 5MP ISP, 256MB DDR3L, 8GB eMMC, optional WiFi 6 and BLE 5.2, dual MIPI CSI camera inputs, and 112 castellated holes. Designed for vision AI and IoT integration.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** module
- **Price:** ~$31.99
- **CPU:** ARM Cortex-A7 @ 1.2GHz + RISC-V MCU, up to 1 TOPS NPU, ISP 3.2
- **RAM:** 256MB DDR3L
- **Flash:** 8GB eMMC 5.1
- **Power:** 3.3V via carrier board
- **Dimensions:** 30 × 30mm

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth Bluetooth 5.2 | Ethernet 10/100 Mbps

## Components

- **RV1106** (soc): Rockchip RV1106 SoC with ARM Cortex-A7 @ 1.2GHz, RISC-V MCU, up to 1 TOPS NPU (INT4/INT8/INT16), ISP 3.2 for 5MP@30fps, H.264/H.265 encoding, integrated audio codec and Ethernet PHY. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Frockchips.net%2Fwp-content%2Fuploads%2F2025%2F03%2FRockchip-RV1106-Datasheet-V1.7-20231218.pdf&ref=openhardware.directory&product=waveshare-luckfox-core1106&source=md-export)

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fcore1106.htm&ref=openhardware.directory&product=waveshare-luckfox-core1106&source=md-export) — 31.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fcore1106.htm&ref=openhardware.directory&product=waveshare-luckfox-core1106&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=waveshare-luckfox-core1106&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FCore1106&ref=openhardware.directory&product=waveshare-luckfox-core1106&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Frockchips.net%2Fwp-content%2Fuploads%2F2025%2F03%2FRockchip-RV1106-Datasheet-V1.7-20231218.pdf&ref=openhardware.directory&product=waveshare-luckfox-core1106&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-luckfox-core1106)

---

# Seeed Studio XIAO ESP32C6

> Thumb-sized (21×17.8mm) Matter/Thread/Zigbee/WiFi 6/BLE 5.3 dev board with dual RISC-V cores, onboard antenna, 15µA deep sleep, and hardware security — for ~$5.

## Quick Facts

- **Brand:** Seeed Studio
- **Board Type:** dev-board
- **Price:** ~$5.4
- **CPU:** RISC-V dual-core (HP: 160MHz + LP: 20MHz)
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** USB-C (5V) or LiPo (3.7V)
- **Dimensions:** 21 × 17.8mm

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.3 | Zigbee Zigbee 3.0

## Compatible Firmware

- arduino
- micropython
- esphome
- esp-idf
- circuitpython
- tasmota

## Components

- **ESP32-C6** (mcu): Espressif ESP32-C6 dual RISC-V (160MHz HP + 20MHz LP), 4MB flash, WiFi 6, BLE 5.3, Zigbee, Thread, Matter, secure boot, TEE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.seeedstudio.com%2Fwiki%2FSeeedStudio-XIAO-ESP32C6%2Fres%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=seeed-xiao-esp32c6&source=md-export)
- **xiao-lipo-charger** (battery-charger): Onboard LiPo battery charger via USB-C with battery measurement via JST connector, deep sleep at 15µA. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2Fxiao_esp32c6_getting_started%2F&ref=openhardware.directory&product=seeed-xiao-esp32c6&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **SDIO**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0/A0 | GPIO / ADC | — | digital-input, digital-output, adc, pwm |
| D1/A1 | GPIO / ADC | — | digital-input, digital-output, adc, pwm |
| D2/A2 | GPIO / ADC | — | digital-input, digital-output, adc, pwm |
| D3/A3 | GPIO / ADC | — | digital-input, digital-output, adc, pwm |
| D4/SDA | I2C SDA / ADC | — | digital-input, digital-output, adc |
| D5/SCL | I2C SCL / ADC | — | digital-input, digital-output, adc |
| D6/TX | UART TX | — | digital-input, digital-output |
| D7/RX | UART RX | — | digital-input, digital-output |
| D8/SCK | SPI CLK | — | digital-input, digital-output |
| D9/MISO | SPI MISO | — | digital-input |
| D10/MOSI | SPI MOSI | — | digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Seeed Studio](https://openhardware.directory/r?to=https%3A%2F%2Fwww.seeedstudio.com%2FSeeed-Studio-XIAO-ESP32C6-p-5884.html&ref=openhardware.directory&product=seeed-xiao-esp32c6&source=md-export) — 5.40

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.seeedstudio.com%2FSeeed-Studio-XIAO-ESP32C6-p-5884.html&ref=openhardware.directory&product=seeed-xiao-esp32c6&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2Fxiao_esp32c6_getting_started%2F&ref=openhardware.directory&product=seeed-xiao-esp32c6&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.seeedstudio.com%2Fwiki%2FSeeedStudio-XIAO-ESP32C6%2Fres%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=seeed-xiao-esp32c6&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.seeedstudio.com%2Fwiki%2FSeeedStudio-XIAO-ESP32C6%2FXIAO_ESP32_C6_v1.0_SCH_260114.pdf&ref=openhardware.directory&product=seeed-xiao-esp32c6&source=md-export)

## Tags

`esp32-c6`, `xiao`, `wifi6`, `thread`, `zigbee`, `matter`, `ble`, `tiny`, `seeed-studio`, `low-power`, `secure-boot`

---
[View full device page](https://openhardware.directory/s/1370/seeed-xiao-esp32c6)

---

# Xiaomi Pad 5 Pro

> Xiaomi Pad 5 Pro Android tablet (Snapdragon 870, 6GB/8GB LPDDR5, WiFi 6) running mainline Armbian Linux via community port — a high-resolution tablet repurposed as a Linux device.

## Quick Facts

- **Brand:** Xiaomi
- **Board Type:** linux-sbc
- **Price:** ~$449
- **CPU:** snapdragon-870
- **RAM:** 6GB/8GB LPDDR5
- **Flash:** 128GB/256GB UFS 3.1
- **USB:** USB-C
- **Power:** 5V via USB-C (67W)

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.2

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mi.com%2Fglobal%2Fproduct%2Fxiaomi-pad-5-pro&ref=openhardware.directory&product=xiaomi-pad-5-pro&source=md-export)

## Tags

`linux-sbc`, `armbian`, `snapdragon`, `tablet-linux`, `xiaomi`, `mobile-linux`

---
[View full device page](https://openhardware.directory/s/1370/xiaomi-pad-5-pro)

---

# Adafruit Feather RP2040 with DVI Output

> RP2040 Feather board with a DVI/HDMI-compatible output port for driving displays at up to 800×480, plus LiPo charging, USB-C, NeoPixel, and STEMMA QT.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** feather
- **Price:** ~$14.95
- **CPU:** RP2040
- **RAM:** 264 KB
- **Flash:** 8 MB
- **Power:** 5V + LiPo
- **Dimensions:** 53.0 x 23.3 x 7.7 mm

## Compatible Firmware

- circuitpython
- micropython
- arduino

## Components

- **RP2040** (mcu): Dual-core ARM Cortex-M0+ at 125 MHz with PIO for DVI output generation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-rp2040-dvi&source=md-export)
- **NeoPixel RGB LED** (led): Onboard addressable RGB NeoPixel. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=adafruit-feather-rp2040-dvi&source=md-export)

## Protocols

- **I2C**: SDA=GPIO24, SCL=GPIO25
- **SPI**: MOSI=GPIO11, MISO=GPIO12, SCK=GPIO13
- **UART**: TX=GPIO0, RX=GPIO1
- **DVI/HDMI (PIO)**: D0_N=GPIO16, D0_P=GPIO17, D1_N=GPIO18, D1_P=GPIO19, D2_N=GPIO20, D2_P=GPIO21, CLK_N=GPIO22, CLK_P=GPIO23

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | TX | — | uart-tx, digital |
| GPIO1 | RX | — | uart-rx, digital |
| GPIO2 | D2 | — | digital, pwm |
| GPIO3 | D3 | — | digital, pwm |
| GPIO4 | D4 | — | digital, pwm |
| GPIO5 | D5 | — | digital, pwm |
| GPIO6 | D6 | — | digital, pwm |
| GPIO7 | D7 | — | digital |
| GPIO8 | D8 | — | digital |
| GPIO9 | D9 | — | digital |
| GPIO11 | MOSI | — | spi-mosi, digital |
| GPIO12 | MISO | — | spi-miso, digital |
| GPIO13 | SCK | — | spi-sck, digital |
| GPIO16 | DVI D0- | — | dvi, digital |
| GPIO17 | DVI D0+ | — | dvi, digital |
| GPIO18 | DVI D1- | — | dvi, digital |
| GPIO19 | DVI D1+ | — | dvi, digital |
| GPIO20 | DVI D2- | — | dvi, digital |
| GPIO21 | DVI D2+ | — | dvi, digital |
| GPIO22 | DVI CLK- | — | dvi, digital |
| GPIO23 | DVI CLK+ | — | dvi, digital |
| GPIO24 | SDA | — | i2c-sda, digital |
| GPIO25 | SCL | — | i2c-scl, digital |
| GPIO26 | A0 | — | analog, digital |
| GPIO27 | A1 | — | analog, digital |
| GPIO28 | A2 | — | analog, digital |
| GPIO29 | A3 | — | analog, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5710&ref=openhardware.directory&product=adafruit-feather-rp2040-dvi&source=md-export) — 14.95

## Available Software

- [PicoDVI Library](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FPicoDVI&ref=openhardware.directory&product=adafruit-feather-rp2040-dvi&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5710&ref=openhardware.directory&product=adafruit-feather-rp2040-dvi&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FPicoDVI&ref=openhardware.directory&product=adafruit-feather-rp2040-dvi&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-rp2040-dvi&ref=openhardware.directory&product=adafruit-feather-rp2040-dvi&source=md-export)

## Tags

`adafruit`, `feather`, `rp2040`, `dvi`, `hdmi`, `display`, `circuitpython`, `video`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-rp2040-dvi)

---

# Adafruit Feather STM32F405 Express

> High-speed Feather-form-factor dev board with STM32F405 ARM Cortex-M4F @ 168MHz, 1MB Flash, 192KB RAM, 2MB SPI Flash, USB-C, STEMMA QT, SD card socket, and LiPo charging. Adafruit's fastest CircuitPython board.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** microcontroller-board
- **Price:** ~$24.95
- **CPU:** ARM Cortex-M4F @ 168MHz (STM32F405)
- **RAM:** 192KB SRAM
- **Flash:** 1MB + 2MB SPI Flash
- **Power:** 5V via USB-C or LiPoly battery
- **Dimensions:** 52.0 x 23.0 x 10.0mm

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- circuitpython
- micropython
- arduino

## Components

- **STM32F405RGT6** (mcu): STMicroelectronics STM32F405 ARM Cortex-M4F @ 168MHz, 1MB Flash, 192KB SRAM, FPU, USB OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32f405rg.pdf&ref=openhardware.directory&product=adafruit-feather-stm32f405-express&source=md-export)

## Protocols

- **I2C**: SDA=PB7, SCL=PB6
- **SPI**: MOSI=PB15, MISO=PB14, SCK=PB13
- **UART**: TX=PA9, RX=PA10
- **SDIO**
- **USB**
- **PWM**
- **ADC**
- **DAC**: DAC1=PA4

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA4 | A0/DAC | — | ADC, DAC, GPIO |
| PA5 | A1 | — | ADC, GPIO |
| PA3 | A2 | — | ADC, GPIO |
| PB3 | A3 | — | ADC, GPIO |
| PC4 | A4 | — | ADC, GPIO |
| PC5 | A5 | — | ADC, GPIO |
| PB4 | D5/PWM | — | PWM, GPIO |
| PB5 | D6/PWM | — | PWM, GPIO |
| PB0 | D9/PWM | — | PWM, GPIO |
| PB12 | D10/PWM/CS | — | SPI, PWM, GPIO |
| PB15 | D11/MOSI | — | SPI, GPIO |
| PB14 | D12/MISO | — | SPI, GPIO |
| PB13 | D13/SCK | — | SPI, GPIO |
| PB7 | SDA | — | I2C, GPIO |
| PB6 | SCL | — | I2C, GPIO |
| PA10 | RX/D0 | — | UART, GPIO |
| PA9 | TX/D1 | — | UART, GPIO |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4382&ref=openhardware.directory&product=adafruit-feather-stm32f405-express&source=md-export) — 24.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4382&ref=openhardware.directory&product=adafruit-feather-stm32f405-express&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4382&ref=openhardware.directory&product=adafruit-feather-stm32f405-express&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-stm32f405-feather-express&ref=openhardware.directory&product=adafruit-feather-stm32f405-express&source=md-export)
- [schematic](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F4382%2F4382-schematic.pdf&ref=openhardware.directory&product=adafruit-feather-stm32f405-express&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_STM32F405_Express&ref=openhardware.directory&product=adafruit-feather-stm32f405-express&source=md-export)

## Tags

`feather`, `stm32`, `stm32f405`, `circuitpython`, `adafruit`, `stemma-qt`, `usb-c`, `sd-card`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-stm32f405-express)

---

# Adafruit Feather 32u4 Basic Proto

> Feather-format ATmega32u4 board at 8 MHz, 3.3V with LiPo charging, native USB, onboard prototyping area, 20 GPIO, JST battery connector, and 100mA integrated charger — all in 51×23mm.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$19.95
- **CPU:** ATmega32u4 @ 8 MHz
- **RAM:** 2 KB
- **Flash:** 32 KB
- **Power:** 3.7V LiPo via JST or 5V Micro USB
- **Dimensions:** 51 × 23 mm

## Compatible Firmware

- arduino
- platformio

## Components

- **ATmega32u4** (mcu): 8-bit AVR with native USB at 8 MHz, 32KB flash, 2KB SRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-basic-proto&source=md-export)
- **MCP73831** (charger): Microchip MCP73831 100mA LiPo/LiIon charge management IC with automatic switchover — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F20001984g.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-basic-proto&source=md-export)

## Protocols

- **UART**: TX=D1, RX=D0
- **SPI**: MOSI=D16, MISO=D14, SCK=D15, SS=D10
- **I2C**: SDA=D2, SCL=D3
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX / INT2 | — | digital-input, digital-output, interrupt |
| D1 | TX / INT3 | — | digital-input, digital-output, interrupt |
| D2 | SDA / INT1 | — | digital-input, digital-output, interrupt |
| D3 | SCL / INT0 / PWM | — | digital-input, digital-output, pwm, interrupt |
| D4 | GPIO / A6 | — | digital-input, digital-output, analog-input |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / A7 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D7 | GPIO / INT6 | — | digital-input, digital-output, interrupt |
| D9 | BATT / A9 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D10 | SS / A10 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D11 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D12 | GPIO / A11 | — | digital-input, digital-output, analog-input |
| D13 | LED / PWM | — | digital-input, digital-output, pwm |
| D14 | MISO | — | digital-input, digital-output |
| D15 | SCK | — | digital-input, digital-output |
| D16 | MOSI | — | digital-input, digital-output |
| A0 | Analog 0 / D18 | — | analog-input, digital-input, digital-output |
| A1 | Analog 1 / D19 | — | analog-input, digital-input, digital-output |
| A2 | Analog 2 / D20 | — | analog-input, digital-input, digital-output |
| A3 | Analog 3 / D21 | — | analog-input, digital-input, digital-output |
| A4 | Analog 4 / D22 | — | analog-input, digital-input, digital-output |
| A5 | Analog 5 / D23 | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2771&ref=openhardware.directory&product=adafruit-feather-32u4-basic-proto&source=md-export) — 19.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2771&ref=openhardware.directory&product=adafruit-feather-32u4-basic-proto&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-32u4-basic-proto&ref=openhardware.directory&product=adafruit-feather-32u4-basic-proto&source=md-export)

## Tags

`feather`, `atmega32u4`, `lipo-charging`, `native-usb`, `adafruit`, `portable`, `breadboard`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-32u4-basic-proto)

---

# Heltec CubeCell GPS-6502 (HTCC-AB02S)

> LoRa + GPS development board based on ASR6502 SiP (ARM Cortex-M0+ with SX1262), featuring integrated AIR530Z GPS/BeiDou module, 0.96" OLED display, solar charging, and ultra-low 21uA deep sleep current for long-range IoT tracking applications.

## Quick Facts

- **Brand:** Heltec Automation
- **Price:** ~$25.9
- **CPU:** ARM Cortex-M0,single-core @ 48MHz
- **RAM:** 16KB SRAM
- **Flash:** 128KB
- **USB:** Micro-USB (CP2102)
- **Power:** 5V Micro-USB,3.7V LiPo,5.5-7V Solar
- **Dimensions:** 55.9 x 27.9 x 9.5mm

## Components

- **ASR6502** (mcu): System-in-Package integrating ARM Cortex-M0+ MCU at 48MHz with Semtech SX1262 LoRa transceiver, 128KB flash, 16KB SRAM, and 8-channel DMA. Supports LoRaWAN 1.0.2 with 22dBm TX power and -135dBm RX sensitivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02S%2FAB02S.pdf&ref=openhardware.directory&product=heltec-cubecell-gps-6502-htcc-ab02s&source=md-export)
- **SX1262** (radio): Semtech SX1262 long-range, low-power sub-GHz RF transceiver supporting LoRa and (G)FSK modulations across 150-960MHz ISM bands. +22dBm TX power, -135dBm sensitivity, 4.2mA active receive current. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F6%2Fb%2F5%2F1%2F4%2FSX1262_datasheet.pdf&ref=openhardware.directory&product=heltec-cubecell-gps-6502-htcc-ab02s&source=md-export)
- **AIR530Z** (gps): Integrated GNSS positioning module supporting GPS, BeiDou, Galileo, GLONASS, and QZSS with 31uA standby current, 4s warm start, 30s cold boot, and sub-10m positioning accuracy via UART interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fc.vue2.cn%2Fattachment%2F20240513161130320_Air530Z-BD_Positioning_Module_User_Manual_V1.0.pdf&ref=openhardware.directory&product=heltec-cubecell-gps-6502-htcc-ab02s&source=md-export)
- **SSD1306** (display-driver): SSD1306 OLED display driver controlling the onboard 0.96-inch 128x64 dot matrix monochrome OLED via I2C interface (SCL0/SDA0). Provides status display for GPS coordinates, LoRa signal, and sensor data. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=heltec-cubecell-gps-6502-htcc-ab02s&source=md-export)
- **CP2102** (usb-serial): Silicon Labs CP2102 USB-to-UART bridge IC providing serial communication between the board and a computer via Micro-USB for programming and debugging. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=heltec-cubecell-gps-6502-htcc-ab02s&source=md-export)

## Protocols

- **SPI0** (SPI0): MISO=GPIO26 (MISO0), MOSI=GPIO25 (MOSI0), CLK=GPIO27 (CLK0), NSS=GPIO28 (NSS0)
- **SPI1** (SPI1): MISO=GPIO2 (MISO1), MOSI=GPIO1 (MOSI1), CLK=GPIO3 (CLK1)
- **I2C0** (I2C0): SCL=GPIO39 (SCL0), SDA=GPIO40 (SDA0)
- **I2C1** (I2C1): SCL=GPIO36 (SCL1), SDA=GPIO37 (SDA1)
- **UART1** (UART1): TX=GPIO18 (TX1), RX=GPIO17 (RX1)
- **UART2** (UART2): TX=GPIO30 (TX2), RX=GPIO29 (RX2)
- **ADC**: ADC1=Pin 2, ADC2=Pin 3, ADC3=Pin 4
- **PWM**: PWM1=GPIO3, PWM2=GPIO4
- **SWD**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | SPI1 MOSI | — | digital-input, digital-output |
| GPIO2 | SPI1 MISO | — | digital-input, digital-output |
| GPIO3 | SPI1 CLK / PWM1 | — | digital-input, digital-output, pwm |
| GPIO4 | PWM2 | — | digital-input, digital-output, pwm |
| GPIO5 | General Purpose IO | — | digital-input, digital-output |
| GPIO6 | General Purpose IO | — | digital-input, digital-output |
| GPIO7 | General Purpose IO | — | digital-input, digital-output |
| GPIO8 | I2C1 SCL | — | digital-input, digital-output |
| GPIO9 | I2C1 SDA | — | digital-input, digital-output |
| GPIO10 | General Purpose IO | — | digital-input, digital-output |
| GPIO11 | General Purpose IO | — | digital-input, digital-output |
| GPIO12 | GPS LED Indicator | — | digital-input, digital-output |
| GPIO13 | RGB LED | — | digital-input, digital-output |
| GPIO14 | VGPS Control (GPS power switch) | — | digital-output |
| GPIO15 | VEXT Control (external 3.3V power switch, LOW=ON) | — | digital-output |
| GPIO16 | VBAT ADC Control / USER Button | — | digital-input, digital-output, adc |
| ADC1 | Analog Input 1 / Power Detection | — | adc |
| ADC2 | Analog Input 2 | — | adc |
| ADC3 | Analog Input 3 | — | adc |

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhtcc-ab02s%2F&ref=openhardware.directory&product=heltec-cubecell-gps-6502-htcc-ab02s&source=md-export) — 25.90
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-Development-Integrated-Compatible-902-928MHz%2Fdp%2FB0D2HMXHH2&ref=openhardware.directory&product=heltec-cubecell-gps-6502-htcc-ab02s&source=md-export) — 25.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhtcc-ab02s%2F&ref=openhardware.directory&product=heltec-cubecell-gps-6502-htcc-ab02s&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FCubeCell-Arduino&ref=openhardware.directory&product=heltec-cubecell-gps-6502-htcc-ab02s&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.org%2Fen%2Fnode%2Fasr650x%2Fhtcc_ab02s%2Findex.html&ref=openhardware.directory&product=heltec-cubecell-gps-6502-htcc-ab02s&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02S%2FAB02S.pdf&ref=openhardware.directory&product=heltec-cubecell-gps-6502-htcc-ab02s&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02S%2FHTCC-AB02S_SchematicDiagram_V1.1.pdf&ref=openhardware.directory&product=heltec-cubecell-gps-6502-htcc-ab02s&source=md-export)

## Tags

`lora`, `gps`, `lorawan`, `tracking`, `iot`, `low-power`, `solar`, `oled`, `arduino`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/heltec-cubecell-gps-6502-htcc-ab02s)

---

# Heltec Turtle Board

> Ultra-low-power LoRa development board with STM32L432KC ARM Cortex-M4 MCU and SX1276 transceiver, capable of 10-year battery life on AAA cells using the RadioShuttle peer-to-peer protocol.

## Quick Facts

- **Brand:** Heltec Automation
- **Price:** ~$41
- **CPU:** ARM Cortex-M4F single-core @ 80MHz, FPU, DSP, AES-256 hardware crypto
- **RAM:** 64KB SRAM
- **Flash:** 256KB
- **USB:** Micro-USB (DFU)
- **Power:** Micro-USB,2x AAA batteries (3V),VIN 3.4-5V
- **Dimensions:** 73.5 x 31.5 x 24mm

## Components

- **STM32L432KC** (mcu): STMicroelectronics 32-bit ARM Cortex-M4 with FPU running at up to 80 MHz, featuring 256KB flash, 64KB SRAM, hardware AES-256 encryption, and 4 uA deep sleep current. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32l432kc.pdf&ref=openhardware.directory&product=heltec-turtle-board&source=md-export)
- **SX1276** (radio): Semtech SX1276 LoRa transceiver supporting 137-1020 MHz with up to +20 dBm TX power, -148 dBm sensitivity, and LoRa/FSK/OOK modulation. Provides 200m to 20km range in ISM bands. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F7%2F7%2F3%2F2%2F2%2FSX1276_Datasheet.pdf&ref=openhardware.directory&product=heltec-turtle-board&source=md-export)

## Protocols

- **SPI** (SPI1): MOSI=PA7, MISO=PA6, SCK=PA5, CS=PA4
- **I2C** (I2C1): SCL=PA9, SDA=PA10
- **UART** (USART2): TX=PA2, RX=PA15
- **ADC**
- **DAC**
- **DFU**
- **SAI**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA0 | LoRa DIO0 — RX/TX Interrupt | — | digital-input |
| PA1 | LoRa Reset | — | digital-output |
| PA2 | USART2 TX (Debug Console) | — | digital-input, digital-output, pwm |
| PA3 | VEXT Power Switch | — | digital-output |
| PA4 | LoRa SPI CS | — | digital-input, digital-output |
| PA5 | SPI1 SCK (LoRa) | — | digital-input, digital-output |
| PA6 | SPI1 MISO (LoRa) | — | digital-input, digital-output, adc |
| PA7 | SPI1 MOSI (LoRa) | — | digital-input, digital-output, adc |
| PA8 | Battery Power Detect | — | digital-input |
| PA9 | I2C1 SCL (10k pullup) | — | digital-input, digital-output, pwm |
| PA10 | I2C1 SDA (10k pullup) | — | digital-input, digital-output, pwm |
| PA13 | SWDIO (Debug) | — | digital-input, digital-output |
| PA14 | SWCLK (Debug) | — | digital-input, digital-output |
| PA15 | USART2 RX (Debug Console) | — | digital-input, digital-output, pwm |
| PB0 | Red LED (Receive Indicator) | — | digital-output, pwm, adc |
| PB1 | Green LED (Status) | — | digital-output, pwm, adc |
| PB3 | SWO Debug / General GPIO | — | digital-input, digital-output, pwm |
| PB4 | General Purpose GPIO | — | digital-input, digital-output, pwm |
| PB5 | General Purpose GPIO | — | digital-input, digital-output, pwm |
| PB6 | General Purpose GPIO | — | digital-input, digital-output, pwm |
| PB7 | General Purpose GPIO | — | digital-input, digital-output, pwm |
| PH3 | User Button / Boot Pin | — | digital-input |

## Where to Buy

- [Heltec Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fturtle-board%2F&ref=openhardware.directory&product=heltec-turtle-board&source=md-export) — 41.00
- [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2F33023966198.html&ref=openhardware.directory&product=heltec-turtle-board&source=md-export) — 29.99
- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-Turtle-Development-LoRaWAN-RadioShuttle%2Fdp%2FB07WPYW35M&ref=openhardware.directory&product=heltec-turtle-board&source=md-export) — 41.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fturtle-board%2F&ref=openhardware.directory&product=heltec-turtle-board&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FRadioShuttle%2FMBED_Turtle_RadioShuttle&ref=openhardware.directory&product=heltec-turtle-board&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.cn%2Fen%2Fnode%2Fstm32%2Fturtle_board%2Findex.html&ref=openhardware.directory&product=heltec-turtle-board&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FTurtleBoard%2FTurtle%2520Board.pdf&ref=openhardware.directory&product=heltec-turtle-board&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FTurtleBoard%2FTurtle_Board_Pinout.pdf&ref=openhardware.directory&product=heltec-turtle-board&source=md-export)

## Tags

`lora`, `stm32`, `low-power`, `iot`, `radioshuttle`, `lorawan`, `sensor-node`

## Certifications

CE

---
[View full device page](https://openhardware.directory/s/1370/heltec-turtle-board)

---

# BigTreeTech Manta M4P V1.0

> Klipper-native 3D printer control board with STM32G0B0RE MCU and BTB connector for Raspberry Pi CM4 or BTT CB1, 4 stepper driver slots, Ethernet, USB-C, and CAN bus support.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$39.98
- **CPU:** STM32G0B0RE
- **RAM:** 36KB
- **Flash:** 512KB
- **USB:** USB Type-C
- **Power:** DC 12V or 24V
- **Dimensions:** 160 x 95 mm

## Connectivity

Ethernet 100M (CB1), 1000M (CM4)

## Compatible Firmware

- Klipper
- Marlin

## Components

- **STM32G0B0RE** (mcu): STMicroelectronics 32-bit ARM Cortex-M0+ at 64MHz, 512KB Flash, 36KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32g0b0re.pdf&ref=openhardware.directory&product=bigtreetech-manta-m4p-v1-0&source=md-export)
- **TPS5450-5A** (voltage-regulator): Texas Instruments TPS5450 5A step-down converter powering the CM4/CB1 compute module. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftps5450.pdf&ref=openhardware.directory&product=bigtreetech-manta-m4p-v1-0&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**
- **CAN bus**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fmanta-m4p-m8p&ref=openhardware.directory&product=bigtreetech-manta-m4p-v1-0&source=md-export) — $39.98

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FManta-M4P&ref=openhardware.directory&product=bigtreetech-manta-m4p-v1-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fmanta-m4p-m8p&ref=openhardware.directory&product=bigtreetech-manta-m4p-v1-0&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.bttwiki.com%2FM4P.html&ref=openhardware.directory&product=bigtreetech-manta-m4p-v1-0&source=md-export)

## Tags

`3d-printer`, `control-board`, `stm32`, `stm32g0`, `klipper`, `stepper-driver`, `can-bus`, `raspberry-pi-cm4`, `cb1`, `ethernet`, `bigtreetech`, `open-source`, `cortex-m0+`, `manta`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-manta-m4p-v1-0)

---

# BigTreeTech Manta M8P V1.1

> 8-axis Klipper-native 3D printer control board with STM32G0B1VET6 MCU, BTB connector for CM4/CB1, CAN bus, eFuse protection, Ethernet, and selectable CNC fan voltage.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$62.38
- **CPU:** STM32G0B1VET6
- **RAM:** 144KB
- **Flash:** 512KB
- **USB:** USB Type-C
- **Power:** DC 12V or 24V (VIN); up to 56V (HV motor)
- **Dimensions:** 170 x 102.7 mm

## Connectivity

Ethernet 100M (CB1), 1000M (CM4)

## Compatible Firmware

- Klipper
- Marlin

## Components

- **STM32G0B1VET6** (mcu): STMicroelectronics 32-bit ARM Cortex-M0+ at 64MHz, 512KB Flash, 144KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32g0b1re.pdf&ref=openhardware.directory&product=bigtreetech-manta-m8p-v1-1&source=md-export)
- **TPS5450-5A** (voltage-regulator): Texas Instruments TPS5450 5A step-down converter powering the CM4/CB1 compute module. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftps5450.pdf&ref=openhardware.directory&product=bigtreetech-manta-m8p-v1-1&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**
- **CAN bus**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fmanta-m4p-m8p&ref=openhardware.directory&product=bigtreetech-manta-m8p-v1-1&source=md-export) — $62.38

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FManta-M8P&ref=openhardware.directory&product=bigtreetech-manta-m8p-v1-1&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fmanta-m4p-m8p&ref=openhardware.directory&product=bigtreetech-manta-m8p-v1-1&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.bttwiki.com%2FM8P.html&ref=openhardware.directory&product=bigtreetech-manta-m8p-v1-1&source=md-export)

## Tags

`3d-printer`, `control-board`, `stm32`, `stm32g0`, `klipper`, `stepper-driver`, `can-bus`, `raspberry-pi-cm4`, `cb1`, `ethernet`, `efuse`, `bigtreetech`, `open-source`, `cortex-m0+`, `manta`, `voron`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-manta-m8p-v1-1)

---

# LILYGO T-FPGA

> LILYGO T-FPGA is a development board combining an ESP32-S3 microcontroller with a Gowin GW1NSR-4C FPGA chip, enabling flexible hardware logic design alongside Wi-Fi and Bluetooth connectivity.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** FPGA
- **Price:** ~$18.98
- **CPU:** ESP32-S3R8
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-S3R8** (mcu): Dual-core Xtensa LX7 processor with Wi-Fi and Bluetooth 5 LE, 8MB PSRAM embedded — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-fpga&source=md-export)
- **GW1NSR-4C** (fpga): Gowin GW1NSR-LV4CQN48PC6/I5 FPGA with 4608 LUT4, 256K flash, 64Mb HyperRAM and hardcoded Cortex-M3 core — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.gowinsemi.com%2Fen%2Fproduct%2Fdetail%2F38%2F&ref=openhardware.directory&product=lilygo-t-fpga&source=md-export)
- **AXP2101** (pmu): PMU enabling multi-bank voltage switching for ESP32-S3 and FPGA power domains — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.x-powers.com%2Fen.php%2FInfo%2Fproduct_detail%2Farticle_id%2F95&ref=openhardware.directory&product=lilygo-t-fpga&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **JTAG**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-fpga&ref=openhardware.directory&product=lilygo-t-fpga&source=md-export) — $18.98

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-fpga&ref=openhardware.directory&product=lilygo-t-fpga&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-FPGA&ref=openhardware.directory&product=lilygo-t-fpga&source=md-export)

## Tags

`fpga`, `esp32-s3`, `gowin`, `iot`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-fpga)

---

# LILYGO T-Lora C6

> LILYGO T-Lora C6 is a compact LoRa development board combining the ESP32-C6 module with SX1262 radio, supporting Wi-Fi 6, Bluetooth 5 LE, Zigbee, Thread, and sub-GHz LoRa communication.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$16.52
- **CPU:** ESP32-C6-MINI-1
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.0 | Zigbee Zigbee (IEEE 802.15.4)

## Components

- **ESP32-C6-MINI-1** (mcu): ESP32-C6 module with RISC-V core, Wi-Fi 6, Bluetooth 5 LE, and IEEE 802.15.4 (Zigbee/Thread) support — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-lora-c6&source=md-export)
- **SX1262** (radio): Semtech SX1262 sub-GHz LoRa transceiver supporting 433, 868, and 915 MHz frequency bands for long-range communication — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-lora-c6&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **GPIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-lora-c6&ref=openhardware.directory&product=lilygo-t-lora-c6&source=md-export) — $16.52

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-lora-c6&ref=openhardware.directory&product=lilygo-t-lora-c6&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-LoRa-Series&ref=openhardware.directory&product=lilygo-t-lora-c6&source=md-export)

## Tags

`esp32-c6`, `lora`, `sx1262`, `zigbee`, `thread`, `iot`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-lora-c6)

---

# LILYGO T-ETH Elite

> High-end ESP32-S3 Ethernet development board with W5500 SPI Ethernet, Power-over-Ethernet support, 16MB flash, 8MB PSRAM, and modular LoRa/LTE expansion shield system.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$23.04
- **CPU:** ESP32-S3R8
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + PoE
- **Dimensions:** 50 × 67mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0 | Ethernet 10/100 Mbps W5500

## Compatible Firmware

- arduino
- esp-idf
- platformio

## Components

- **ESP32-S3R8** (mcu): Dual-core Xtensa LX7 at 240MHz with 512KB SRAM, Wi-Fi and BLE 5 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-eth-elite-1&source=md-export)
- **W5500** (ethernet-phy): SPI-based hardwired TCP/IP Ethernet controller supporting TCP, UDP, ICMP, IPv4, ARP, PPPoE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wiznet.io%2Fwp-content%2Fuploads%2Fwizdoc%2FW5500_DS_V109E.pdf&ref=openhardware.directory&product=lilygo-t-eth-elite-1&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **TCP/IP**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-eth-elite-1&ref=openhardware.directory&product=lilygo-t-eth-elite-1&source=md-export) — $23.04

## Available Software

- [Arduino IDE](https://openhardware.directory/r?to=https%3A%2F%2Fwww.arduino.cc%2F&ref=openhardware.directory&product=lilygo-t-eth-elite-1&source=md-export)
- [ESP-IDF](https://openhardware.directory/r?to=https%3A%2F%2Fidf.espressif.com%2F&ref=openhardware.directory&product=lilygo-t-eth-elite-1&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-eth-elite-1&ref=openhardware.directory&product=lilygo-t-eth-elite-1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGO-T-ETH-Series&ref=openhardware.directory&product=lilygo-t-eth-elite-1&source=md-export)

## Tags

`esp32-s3`, `ethernet`, `poe`, `w5500`, `lorawan-gateway`, `iot-gateway`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-eth-elite-1)

---

# FT232 USB to TTL Serial Adapter

> FTDI FT232RL-based USB-to-TTL serial adapter with selectable 3.3V/5V logic, 6-pin header, and full modem signals. Essential tool for programming Arduino, ESP8266, and other MCUs.

## Quick Facts

- **Brand:** OpenELAB
- **Board Type:** module
- **Price:** ~$6.99
- **CPU:** FT232RL embedded USB engine (no user-programmable CPU)
- **RAM:** N/A (peripheral module)
- **Flash:** N/A (peripheral module)
- **USB:** Mini-USB
- **Power:** 5V

## Components

- **FT232RL** (usb-uart): FTDI FT232RL USB-to-serial converter with full modem control signals, up to 3Mbps baud rate, and 3.3V/5V I/O support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fftdichip.com%2Fwp-content%2Fuploads%2F2020%2F08%2FDS_FT232R.pdf&ref=openhardware.directory&product=ft232-usb-to-ttl&source=md-export)

## Protocols

- **UART**
- **USB**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fft232-usb-to-ttl-serial&ref=openhardware.directory&product=ft232-usb-to-ttl&source=md-export) — $6.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fft232-usb-to-ttl-serial&ref=openhardware.directory&product=ft232-usb-to-ttl&source=md-export)

## Tags

`ft232`, `ftdi`, `usb-to-serial`, `uart`, `ttl`, `programmer`, `3.3v`, `5v`, `arduino`, `esp8266`

---
[View full device page](https://openhardware.directory/s/1370/ft232-usb-to-ttl)

---

# Banana Pi M7

> Banana Pi M7 is a high-performance SBC powered by the Rockchip RK3588 octa-core SoC with up to 32GB LPDDR4X, NVMe SSD support, WiFi 6, dual 2.5GbE, and USB-C PD power.

## Quick Facts

- **Brand:** Banana Pi
- **Board Type:** linux-sbc
- **Price:** ~$165
- **CPU:** Rockchip RK3588
- **RAM:** 8GB/16GB/32GB LPDDR4X
- **Flash:** eMMC + M.2 NVMe
- **USB:** USB 3.0 + USB-C
- **Power:** USB-C PD 5V-20V

## Connectivity

WiFi WiFi 6 (802.11ax) | Bluetooth BT 5.0 | Ethernet 2x 2.5 Gigabit Ethernet

## Compatible Firmware

- armbian

## Components

- **Rockchip RK3588** (soc): Rockchip RK3588 octa-core SoC with Cortex-A76x4 + A55x4 at 2.4GHz, Mali-G610 GPU, and 6 TOPS NPU for AI inference. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=bananapi-m7&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2F1005006504845998.html&ref=openhardware.directory&product=bananapi-m7&source=md-export) — $165.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fbananapi-m7%2F&ref=openhardware.directory&product=bananapi-m7&source=md-export)
- [vendor](https://openhardware.directory/r?to=https%3A%2F%2Fwww.banana-pi.org%2Fen%2Fbanana-pi-sbcs%2F169.html&ref=openhardware.directory&product=bananapi-m7&source=md-export)

## Tags

`banana-pi`, `rockchip`, `rk3588`, `sbc`, `linux`, `armbian`, `nvme`, `wifi6`, `2.5gbe`, `single-board-computer`, `ai`, `npu`

---
[View full device page](https://openhardware.directory/s/1370/bananapi-m7)

---

# Adafruit FLORA v3

> Round, sewable Arduino-compatible wearable platform with ATmega32u4, native USB, NeoPixel, JST battery connector, and alligator-clip-friendly pads in a 45mm diameter form factor.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$14.95
- **CPU:** ATmega32u4 @ 8 MHz
- **RAM:** 2.5 KB
- **Flash:** 32 KB
- **Power:** 3.5-16V via JST battery connector or Micro USB
- **Dimensions:** 45 mm diameter × 7 mm thick

## Compatible Firmware

- arduino
- circuitpython
- platformio

## Components

- **ATmega32u4** (mcu): 8-bit AVR microcontroller with native USB at 8 MHz, 32KB flash, 2.5KB SRAM — same chip as Arduino Leonardo — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=adafruit-flora-v3&source=md-export)
- **WS2812B** (led): Addressable RGB LED integrated on board, programmable via single-wire protocol — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=adafruit-flora-v3&source=md-export)

## Protocols

- **UART**: TX=D1, RX=D0
- **SPI**: MOSI=D16, MISO=D14, SCK=D15
- **I2C**: SDA=D2, SCL=D3
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX | — | digital-input, digital-output |
| D1 | TX | — | digital-input, digital-output |
| D2 | SDA / INT0 | — | digital-input, digital-output, interrupt |
| D3 | SCL / INT1 | — | digital-input, digital-output, interrupt |
| D6 | GPIO / A7 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D8 | NEOPIXEL | — | digital-output |
| D9 | GPIO / A9 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D10 | GPIO / A10 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D12 | GPIO / A11 | — | digital-input, digital-output, analog-input |
| D14 | MISO | — | digital-input, digital-output |
| D15 | SCK | — | digital-input, digital-output |
| D16 | MOSI | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F659&ref=openhardware.directory&product=adafruit-flora-v3&source=md-export) — 14.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F659&ref=openhardware.directory&product=adafruit-flora-v3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fgetting-started-with-flora&ref=openhardware.directory&product=adafruit-flora-v3&source=md-export)

## Tags

`wearable`, `sewable`, `atmega32u4`, `neopixel`, `arduino-compatible`, `adafruit`, `flora`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-flora-v3)

---

# Adafruit Metro Mini 328 V2

> Breadboard-friendly ATmega328P Arduino-compatible board at 16 MHz, 5V, with USB-C, STEMMA QT I2C port, 32KB flash, and CP2102N USB-serial chip — a compact modern drop-in for the Arduino UNO.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$14.95
- **CPU:** ATmega328P @ 16 MHz
- **RAM:** 2 KB
- **Flash:** 32 KB
- **Power:** 5V via USB-C or 6-16V Vin pin
- **Dimensions:** 44.3 × 17.8 mm

## Compatible Firmware

- arduino
- platformio

## Components

- **ATmega328P** (mcu): 8-bit AVR RISC microcontroller at 16 MHz, 32KB flash, 2KB SRAM, 1KB EEPROM with Optiboot bootloader — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf&ref=openhardware.directory&product=adafruit-metro-mini-328&source=md-export)
- **CP2102N** (usb-serial): Silicon Labs CP2102N USB-to-UART bridge for programming and serial communication — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2Fcp2102n-datasheet.pdf&ref=openhardware.directory&product=adafruit-metro-mini-328&source=md-export)

## Protocols

- **UART**: TX=D1, RX=D0
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, SS=D10
- **I2C**: SDA=A4, SCL=A5
- **ICSP**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX | — | digital-input, digital-output |
| D1 | TX | — | digital-input, digital-output |
| D2 | GPIO / INT0 | — | digital-input, digital-output, interrupt |
| D3 | GPIO / INT1 / PWM | — | digital-input, digital-output, pwm, interrupt |
| D4 | GPIO | — | digital-input, digital-output |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D7 | GPIO | — | digital-input, digital-output |
| D8 | GPIO | — | digital-input, digital-output |
| D9 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D10 | SS / PWM | — | digital-input, digital-output, pwm |
| D11 | MOSI / PWM | — | digital-input, digital-output, pwm |
| D12 | MISO | — | digital-input, digital-output |
| D13 | SCK / LED | — | digital-input, digital-output |
| A0 | Analog 0 / D14 | — | analog-input, digital-input, digital-output |
| A1 | Analog 1 / D15 | — | analog-input, digital-input, digital-output |
| A2 | Analog 2 / D16 | — | analog-input, digital-input, digital-output |
| A3 | Analog 3 / D17 | — | analog-input, digital-input, digital-output |
| A4 | SDA / Analog 4 / D18 | — | analog-input, digital-input, digital-output |
| A5 | SCL / Analog 5 / D19 | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2590&ref=openhardware.directory&product=adafruit-metro-mini-328&source=md-export) — 14.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2590&ref=openhardware.directory&product=adafruit-metro-mini-328&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-METRO-328-PCB&ref=openhardware.directory&product=adafruit-metro-mini-328&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf&ref=openhardware.directory&product=adafruit-metro-mini-328&source=md-export)

## Tags

`atmega328p`, `arduino-compatible`, `usb-c`, `stemma-qt`, `compact`, `adafruit`, `metro-mini`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-metro-mini-328)

---

# Adafruit ItsyBitsy M4 Express

> High-performance compact board with ATSAMD51 Cortex M4F at 120MHz, 192KB RAM, 512KB flash, 2MB SPI flash, dual 12-bit DAC/ADC, 18 PWM outputs, AES-256 crypto, and native USB. Measures 36mm × 18mm.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$14.95
- **CPU:** Microchip ATSAMD51 ARM Cortex M4F
- **RAM:** 192 KB
- **Flash:** 512 KB
- **GPIO:** 23 pins
- **Power:** 5V via Micro USB or LiPo battery via JST connector
- **Dimensions:** 35.9mm × 17.8mm × 4.2mm

## Compatible Firmware

- circuitpython
- arduino

## Components

- **ATSAMD51** (mcu): 32-bit ARM Cortex M4F at 120 MHz with 512 KB flash, 192 KB SRAM, AES-256, TRNG, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D5xE5x_Family_Data_Sheet_DS60001507G.pdf&ref=openhardware.directory&product=adafruit-itsybitsy-m4-express&source=md-export)
- **GD25Q16C** (flash): 2 MB SPI NOR flash for CircuitPython code, accessible as USB drive. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.gigadevice.com%2Fdatasheet%2Fgd25q16c%2F&ref=openhardware.directory&product=adafruit-itsybitsy-m4-express&source=md-export)
- **APA102 DotStar** (led): Built-in RGB DotStar LED for status and animations. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F2343%2FSK9822_FINAL.pdf&ref=openhardware.directory&product=adafruit-itsybitsy-m4-express&source=md-export)

## Protocols

- **I2C**: SDA=D14, SCL=D15
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, SS=D10
- **UART**: TX=D0, RX=D1
- **USB**
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | TX | — | digital-input, digital-output |
| D1 | RX | — | digital-input, digital-output |
| D2 | GPIO | — | digital-input, digital-output |
| D3 | GPIO | — | digital-input, digital-output, pwm |
| D4 | GPIO | — | digital-input, digital-output |
| D5 | GPIO | — | digital-input, digital-output, pwm |
| D7 | GPIO | — | digital-input, digital-output |
| D9 | GPIO | — | digital-input, digital-output, pwm |
| D10 | SS | — | digital-input, digital-output, pwm |
| D11 | MOSI | — | digital-input, digital-output, pwm |
| D12 | MISO | — | digital-input, digital-output |
| D13 | SCK | — | digital-input, digital-output |
| D14 | SDA | — | digital-input, digital-output |
| D15 | SCL | — | digital-input, digital-output |
| A0 | ADC/DAC | — | digital-input, digital-output, analog-input, dac |
| A1 | ADC/DAC | — | digital-input, digital-output, analog-input, dac |
| A2 | ADC | — | digital-input, digital-output, analog-input |
| A3 | ADC | — | digital-input, digital-output, analog-input |
| A4 | ADC | — | digital-input, digital-output, analog-input |
| A5 | ADC | — | digital-input, digital-output, analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3800&ref=openhardware.directory&product=adafruit-itsybitsy-m4-express&source=md-export) — 14.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3800&ref=openhardware.directory&product=adafruit-itsybitsy-m4-express&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3800&ref=openhardware.directory&product=adafruit-itsybitsy-m4-express&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fintroducing-adafruit-itsybitsy-m4&ref=openhardware.directory&product=adafruit-itsybitsy-m4-express&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-ItsyBitsy-M4-Express-PCB&ref=openhardware.directory&product=adafruit-itsybitsy-m4-express&source=md-export)

## Tags

`circuitpython`, `arduino`, `atsamd51`, `cortex-m4`, `adafruit`, `itsybitsy`, `express`, `compact`, `high-performance`, `dac`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-itsybitsy-m4-express)

---

# Raspberry Pi Compute Module 3+

> The Raspberry Pi Compute Module 3+ is a SODIMM-form-factor system-on-module with the BCM2837B0 quad-core Cortex-A53 at 1.2GHz, 1GB LPDDR2 RAM, and eMMC storage variants of 8GB, 16GB, 32GB, or the storage-free Lite version for custom-PCB industrial designs.

## Quick Facts

- **Brand:** Raspberry Pi
- **Board Type:** compute-module
- **Price:** ~$25
- **CPU:** BCM2837B0 ARM Cortex-A53 quad-core @ 1.2GHz
- **RAM:** 1 GB LPDDR2
- **Flash:** 8 GB / 16 GB / 32 GB eMMC, or none (Lite)
- **Power:** via SODIMM carrier board

## Connectivity

Ethernet Gigabit Ethernet PHY (requires carrier board)

## Compatible Firmware

- arduino

## Components

- **BCM2837B0** (mcu): Broadcom BCM2837B0 quad-core ARM Cortex-A53 64-bit SoC at 1.2GHz with VideoCore IV GPU, 1GB LPDDR2 RAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fcm3%2Fcm3-plus-datasheet.pdf&ref=openhardware.directory&product=raspberry-pi-compute-module-3&source=md-export)

## Protocols

- **I2C**: SDA=GPIO2, SCL=GPIO3
- **SPI**: MOSI=GPIO10, MISO=GPIO9, SCK=GPIO11, CE0=GPIO8, CE1=GPIO7
- **UART**: TX=GPIO14, RX=GPIO15
- **GPIO**
- **USB**
- **SDIO**
- **CSI**
- **DSI**
- **HDMI**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | SDA | — | i2c-sda, digital |
| GPIO3 | SCL | — | i2c-scl, digital |
| GPIO9 | MISO | — | spi-miso, digital |
| GPIO10 | MOSI | — | spi-mosi, digital |
| GPIO11 | SCK | — | spi-sck, digital |
| GPIO8 | CE0 | — | spi-cs, digital |
| GPIO7 | CE1 | — | spi-cs, digital |
| GPIO14 | TX | — | uart-tx, digital |
| GPIO15 | RX | — | uart-rx, digital |
| GPIO4 | GPIO4 | — | digital |
| GPIO5 | GPIO5 | — | digital |
| GPIO6 | GPIO6 | — | digital |
| GPIO12 | GPIO12 | — | digital |
| GPIO13 | GPIO13 | — | digital |
| GPIO16 | GPIO16 | — | digital |
| GPIO17 | GPIO17 | — | digital |
| GPIO18 | GPIO18 | — | digital |
| GPIO19 | GPIO19 | — | digital |
| GPIO20 | GPIO20 | — | digital |
| GPIO21 | GPIO21 | — | digital |
| GPIO22 | GPIO22 | — | digital |
| GPIO23 | GPIO23 | — | digital |
| GPIO24 | GPIO24 | — | digital |
| GPIO25 | GPIO25 | — | digital |
| GPIO26 | GPIO26 | — | digital |
| GPIO27 | GPIO27 | — | digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit (CM3+ 8GB)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4094&ref=openhardware.directory&product=raspberry-pi-compute-module-3&source=md-export) — $25.00
- [Adafruit (CM3+ Lite)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4093&ref=openhardware.directory&product=raspberry-pi-compute-module-3&source=md-export) — $25.00
- [Adafruit (CM3+ Dev Kit)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4092&ref=openhardware.directory&product=raspberry-pi-compute-module-3&source=md-export) — $99.00

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4094&ref=openhardware.directory&product=raspberry-pi-compute-module-3&source=md-export)
- [docs](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fcm3%2Fcm3-plus-datasheet.pdf&ref=openhardware.directory&product=raspberry-pi-compute-module-3&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fcm3%2Fcm3-plus-io-board-schematics.pdf&ref=openhardware.directory&product=raspberry-pi-compute-module-3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fraspberrypi&ref=openhardware.directory&product=raspberry-pi-compute-module-3&source=md-export)

## Tags

`raspberry-pi`, `compute-module`, `cm3plus`, `bcm2837`, `cortex-a53`, `sodimm`, `linux`, `industrial`, `sbc`

## Certifications

FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/raspberry-pi-compute-module-3)

---

# Arduino Zero

> 32-bit ARM Cortex-M0+ Arduino in UNO form factor with ATSAMD21G18 at 48 MHz, 256KB flash, 32KB SRAM, onboard EDBG debugger, dual USB ports, 12-bit ADC/DAC — designed for IoT, wearables, and robotics.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$54.95
- **CPU:** ATSAMD21G18 ARM Cortex-M0+ @ 48 MHz
- **RAM:** 32 KB
- **Flash:** 256 KB
- **Power:** 5V via Micro USB (Programming or Native port) or 7-12V DC barrel jack
- **Dimensions:** 70.3 × 53.5 × 12.7 mm

## Compatible Firmware

- arduino
- circuitpython
- platformio
- micropython

## Components

- **ATSAMD21G18** (mcu): Microchip ARM Cortex-M0+ at 48 MHz, 256KB flash, 32KB SRAM, native USB, 12-bit ADC, 10-bit DAC, hardware EDBG debugger — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D21_DA1_Family_DataSheet_DS40001882H.pdf&ref=openhardware.directory&product=arduino-zero&source=md-export)

## Protocols

- **UART**: TX=D1, RX=D0, TX1=D1, RX1=D0
- **SPI**: MOSI=D23, MISO=D22, SCK=D24, SS=D10
- **I2C**: SDA=D20, SCL=D21
- **USB**
- **SWD/JTAG**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX | — | digital-input, digital-output |
| D1 | TX | — | digital-input, digital-output |
| D2 | GPIO | — | digital-input, digital-output |
| D3 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D4 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D7 | GPIO | — | digital-input, digital-output |
| D8 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D9 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D10 | SS / PWM | — | digital-input, digital-output, pwm |
| D11 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D12 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D13 | LED / PWM | — | digital-input, digital-output, pwm |
| D20 | SDA (PA22) | — | digital-input, digital-output |
| D21 | SCL (PA23) | — | digital-input, digital-output |
| D22 | MISO (PA14) | — | digital-input, digital-output |
| D23 | MOSI (PA12) | — | digital-input, digital-output |
| D24 | SCK (PA13) | — | digital-input, digital-output |
| A0 | DAC / Analog 0 | — | analog-input, analog-output, digital-input, digital-output |
| A1 | Analog 1 | — | analog-input, digital-input, digital-output |
| A2 | Analog 2 | — | analog-input, digital-input, digital-output |
| A3 | Analog 3 | — | analog-input, digital-input, digital-output |
| A4 | Analog 4 | — | analog-input, digital-input, digital-output |
| A5 | Analog 5 | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2843&ref=openhardware.directory&product=arduino-zero&source=md-export) — 54.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2843&ref=openhardware.directory&product=arduino-zero&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fzero&ref=openhardware.directory&product=arduino-zero&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D21_DA1_Family_DataSheet_DS40001882H.pdf&ref=openhardware.directory&product=arduino-zero&source=md-export)

## Tags

`arduino`, `atsamd21`, `arm`, `cortex-m0`, `32-bit`, `debugger`, `edbg`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/arduino-zero)

---

# Raspberry Pi Compute Module 4

> Industrial-grade embedded computer module with BCM2711 quad-core Cortex-A72 @ 1.5GHz, 1–8GB LPDDR4 RAM, optional 8–32GB eMMC and optional dual-band WiFi + Bluetooth 5.0. Available in 32 hardware variants on dual high-density connectors.

## Quick Facts

- **Brand:** Raspberry Pi
- **Board Type:** compute-module
- **Price:** ~$25
- **CPU:** BCM2711 quad-core ARM Cortex-A72 @ 1.5GHz, 64-bit
- **RAM:** 1GB / 2GB / 4GB / 8GB LPDDR4-3200 (variant-dependent)
- **Flash:** None (Lite) / 8GB / 16GB / 32GB eMMC (variant-dependent)
- **Power:** 3.3V + 5V via carrier board connectors
- **Dimensions:** 55 x 40mm

## Connectivity

WiFi optional: 802.11ac dual-band + Bluetooth 5.0 (variant-dependent) | Bluetooth optional: Bluetooth 5.0 BLE (variant-dependent) | Zigbee false | Ethernet Gigabit Ethernet PHY (IEEE 1588, via carrier board)

## Compatible Firmware

- raspberry-pi-os
- ubuntu
- home-assistant-os

## Components

- **BCM2711** (mcu): Broadcom BCM2711 quad-core ARM Cortex-A72 @ 1.5GHz, VideoCore VI GPU, 4Kp60 HEVC decode, PCIe Gen 2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fbcm2711%2Fbcm2711-peripherals.pdf&ref=openhardware.directory&product=raspberry-pi-compute-module-4&source=md-export)

## Protocols

- **I2C**: SDA=GPIO2, SCL=GPIO3
- **SPI**: MOSI=GPIO10, MISO=GPIO9, SCK=GPIO11, CE0=GPIO8, CE1=GPIO7
- **UART**: TX=GPIO14, RX=GPIO15
- **I2S**: CLK=GPIO18, FS=GPIO19, DIN=GPIO20, DOUT=GPIO21
- **GPIO**
- **PCIe**
- **USB**
- **HDMI**
- **CSI**
- **DSI**
- **Ethernet**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | GPIO0 — ID_SD (HAT EEPROM) | — | digital-input, digital-output |
| GPIO1 | GPIO1 — ID_SC (HAT EEPROM) | — | digital-input, digital-output |
| GPIO2 | SDA1 — I2C1 Data | — | i2c, digital-input, digital-output |
| GPIO3 | SCL1 — I2C1 Clock | — | i2c, digital-input, digital-output |
| GPIO4 | GPIO4 — General Purpose | — | digital-input, digital-output |
| GPIO5 | GPIO5 — General Purpose | — | digital-input, digital-output |
| GPIO6 | GPIO6 — General Purpose | — | digital-input, digital-output |
| GPIO7 | SPI0 CE1 — SPI0 Chip Enable 1 | — | spi, digital-input, digital-output |
| GPIO8 | SPI0 CE0 — SPI0 Chip Enable 0 | — | spi, digital-input, digital-output |
| GPIO9 | SPI0 MISO — SPI0 MISO | — | spi, digital-input, digital-output |
| GPIO10 | SPI0 MOSI — SPI0 MOSI | — | spi, digital-input, digital-output |
| GPIO11 | SPI0 CLK — SPI0 Clock | — | spi, digital-input, digital-output |
| GPIO14 | UART0 TX — UART0 Transmit | — | uart, digital-input, digital-output |
| GPIO15 | UART0 RX — UART0 Receive | — | uart, digital-input, digital-output |
| GPIO16 | GPIO16 — General Purpose | — | digital-input, digital-output |
| GPIO17 | GPIO17 — General Purpose | — | digital-input, digital-output |
| GPIO18 | PCM CLK — I2S Clock / PWM0 | — | digital-input, digital-output, pwm |
| GPIO19 | PCM FS — I2S Frame Sync / PWM1 | — | digital-input, digital-output, pwm |
| GPIO20 | PCM DIN — I2S Data In | — | digital-input, digital-output |
| GPIO21 | PCM DOUT — I2S Data Out | — | digital-input, digital-output |
| GPIO22 | GPIO22 — General Purpose | — | digital-input, digital-output |
| GPIO23 | GPIO23 — General Purpose | — | digital-input, digital-output |
| GPIO24 | GPIO24 — General Purpose | — | digital-input, digital-output |
| GPIO25 | GPIO25 — General Purpose | — | digital-input, digital-output |
| GPIO26 | GPIO26 — General Purpose | — | digital-input, digital-output |
| GPIO27 | GPIO27 — General Purpose | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit (1GB, Lite, No WiFi)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4782&ref=openhardware.directory&product=raspberry-pi-compute-module-4&source=md-export) — 25
- [Adafruit (2GB, WiFi, Lite)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4788&ref=openhardware.directory&product=raspberry-pi-compute-module-4&source=md-export) — 40
- [Adafruit (2GB, WiFi, 8GB eMMC)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4790&ref=openhardware.directory&product=raspberry-pi-compute-module-4&source=md-export) — 55
- [Adafruit (2GB, WiFi, 16GB eMMC)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4791&ref=openhardware.directory&product=raspberry-pi-compute-module-4&source=md-export) — 65

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4782&ref=openhardware.directory&product=raspberry-pi-compute-module-4&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4782&ref=openhardware.directory&product=raspberry-pi-compute-module-4&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fproducts%2Fcompute-module-4%2F&ref=openhardware.directory&product=raspberry-pi-compute-module-4&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fcm4%2Fcm4-datasheet.pdf&ref=openhardware.directory&product=raspberry-pi-compute-module-4&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fraspberrypi&ref=openhardware.directory&product=raspberry-pi-compute-module-4&source=md-export)

## Tags

`raspberry-pi`, `compute-module`, `cm4`, `arm`, `cortex-a72`, `linux`, `pcie`, `embedded`, `industrial`

## Certifications

RoHS, FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/raspberry-pi-compute-module-4)

---

# Adafruit Grand Central M4 Express

> Arduino Mega-form-factor board with ATSAMD51P20 Cortex M4F at 120MHz, 1MB flash, 256KB RAM, 8MB QSPI flash, 70 GPIO pins, SD card slot, 8 SERCOM, 22 PWM outputs, dual DAC/ADC, AES-256, and native USB.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$39.95
- **CPU:** Microchip ATSAMD51P20 ARM Cortex M4F
- **RAM:** 256 KB
- **Flash:** 1 MB
- **GPIO:** 70 pins
- **Power:** 6-12V DC via barrel jack or 5V via Micro USB
- **Dimensions:** 101.6mm × 53.3mm × 15.3mm

## Compatible Firmware

- circuitpython
- arduino

## Components

- **ATSAMD51P20** (mcu): 32-bit ARM Cortex M4F at 120 MHz with 1 MB flash, 256 KB SRAM, AES-256, TRNG, 8 SERCOM, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D5xE5x_Family_Data_Sheet_DS60001507G.pdf&ref=openhardware.directory&product=adafruit-grand-central-m4-express&source=md-export)
- **GD25Q64C** (flash): 8 MB QSPI NOR flash for CircuitPython code, assets, and data storage. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.gigadevice.com%2Fdatasheet%2Fgd25q64c%2F&ref=openhardware.directory&product=adafruit-grand-central-m4-express&source=md-export)

## Protocols

- **I2C**: SDA=D20, SCL=D21
- **SPI**: MOSI=D23, MISO=D22, SCK=D24, SS=D10
- **UART**: TX=D1, RX=D0
- **USB**
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX | — | digital-input, digital-output |
| D1 | TX | — | digital-input, digital-output |
| D2 | GPIO | — | digital-input, digital-output |
| D3 | GPIO | — | digital-input, digital-output, pwm |
| D4 | GPIO | — | digital-input, digital-output |
| D5 | GPIO | — | digital-input, digital-output, pwm |
| D6 | GPIO | — | digital-input, digital-output, pwm |
| D7 | GPIO | — | digital-input, digital-output |
| D8 | GPIO | — | digital-input, digital-output |
| D9 | GPIO | — | digital-input, digital-output, pwm |
| D10 | SS | — | digital-input, digital-output, pwm |
| D11 | MOSI | — | digital-input, digital-output, pwm |
| D12 | MISO | — | digital-input, digital-output |
| D13 | SCK | — | digital-input, digital-output |
| D20 | SDA | — | digital-input, digital-output |
| D21 | SCL | — | digital-input, digital-output |
| D22 | MISO2 | — | digital-input, digital-output |
| D23 | MOSI2 | — | digital-input, digital-output |
| D24 | SCK2 | — | digital-input, digital-output |
| A0 | ADC/DAC | — | digital-input, digital-output, analog-input, dac |
| A1 | ADC/DAC | — | digital-input, digital-output, analog-input, dac |
| A2 | ADC | — | digital-input, digital-output, analog-input |
| A3 | ADC | — | digital-input, digital-output, analog-input |
| A4 | ADC | — | digital-input, digital-output, analog-input |
| A5 | ADC | — | digital-input, digital-output, analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4064&ref=openhardware.directory&product=adafruit-grand-central-m4-express&source=md-export) — 39.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4064&ref=openhardware.directory&product=adafruit-grand-central-m4-express&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4064&ref=openhardware.directory&product=adafruit-grand-central-m4-express&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-grand-central&ref=openhardware.directory&product=adafruit-grand-central-m4-express&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Grand-Central-M4-Express-PCB&ref=openhardware.directory&product=adafruit-grand-central-m4-express&source=md-export)

## Tags

`circuitpython`, `arduino`, `atsamd51`, `cortex-m4`, `adafruit`, `grand-central`, `arduino-mega`, `high-performance`, `sd-card`, `70-gpio`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-grand-central-m4-express)

---

# Arduino Uno R3

> The quintessential beginner microcontroller board with ATmega328P @ 16MHz, 32KB Flash, 2KB SRAM, 14 digital I/O, 6 analog inputs, USB-B for programming, DC barrel jack, and the R3 expanded shield header. Open-source hardware.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** microcontroller-board
- **Price:** ~$22.5
- **CPU:** ATmega328P @ 16MHz (8-bit AVR)
- **RAM:** 2KB SRAM + 1KB EEPROM
- **Flash:** 32KB (0.5KB bootloader)
- **Power:** 5V via USB-B or 7-12V DC barrel jack
- **Dimensions:** 68.6 x 53.3mm

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- arduino

## Components

- **ATmega328P** (mcu): Microchip ATmega328P 8-bit AVR @ 16MHz, 32KB Flash, 2KB SRAM, 1KB EEPROM, UART/SPI/I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F4806%2F4806_Atmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf&ref=openhardware.directory&product=arduino-uno-r3&source=md-export)
- **ATmega16U2** (usb-uart): Microchip ATmega16U2 handling USB-to-serial bridge for Arduino programming. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F7799S.pdf&ref=openhardware.directory&product=arduino-uno-r3&source=md-export)

## Protocols

- **I2C**: SDA=A4, SCL=A5
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, CS=D10
- **UART**: TX=D1, RX=D0
- **PWM**: D3=D3, D5=D5, D6=D6, D9=D9, D10=D10, D11=D11
- **ADC**: A0=A0, A1=A1, A2=A2, A3=A3, A4=A4, A5=A5

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | — | — | — |
| D1 | — | — | — |
| D2 | — | — | — |
| D3 | — | — | — |
| D4 | — | — | — |
| D5 | — | — | — |
| D6 | — | — | — |
| D7 | — | — | — |
| D8 | — | — | — |
| D9 | — | — | — |
| D10 | — | — | — |
| D11 | — | — | — |
| D12 | — | — | — |
| D13 | — | — | — |
| A0 | — | — | — |
| A1 | — | — | — |
| A2 | — | — | — |
| A3 | — | — | — |
| A4 | — | — | — |
| A5 | — | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4806&ref=openhardware.directory&product=arduino-uno-r3&source=md-export) — 22.5
- [Arduino Store](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Farduino-uno-rev3&ref=openhardware.directory&product=arduino-uno-r3&source=md-export) — 27.6

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4806&ref=openhardware.directory&product=arduino-uno-r3&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4806&ref=openhardware.directory&product=arduino-uno-r3&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fwww.arduino.cc%2Fen%2Fhardware%2Funos&ref=openhardware.directory&product=arduino-uno-r3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Farduino%2FArduino&ref=openhardware.directory&product=arduino-uno-r3&source=md-export)

## Tags

`arduino`, `atmega328p`, `avr`, `8-bit`, `open-source`, `beginner`, `shield`, `educational`, `uno`

## Certifications

RoHS, CE

---
[View full device page](https://openhardware.directory/s/1370/arduino-uno-r3)

---

# Adafruit ItsyBitsy RP2040

> Tiny 36×18mm breadboard-friendly board with Raspberry Pi RP2040 dual-core Cortex-M0+ @ 133MHz, 264KB SRAM, 8MB Flash, 23 GPIO, 4 ADC, 2 PIO peripherals, and Micro-USB. Runs CircuitPython and MicroPython.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** microcontroller-board
- **Price:** ~$9.95
- **CPU:** Dual ARM Cortex-M0+ @ 133MHz (RP2040)
- **RAM:** 264KB SRAM
- **Flash:** 8MB SPI Flash
- **Power:** 5V via Micro-USB or 3.3V pin
- **Dimensions:** 36 x 18 x 4mm

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- circuitpython
- micropython
- arduino

## Components

- **RP2040** (mcu): Raspberry Pi RP2040 dual-core ARM Cortex-M0+ @ 133MHz, 264KB SRAM, 2x PIO, 16 PWM, USB 1.1. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.org%2Frp2040%2Frp2040_datasheet.pdf&ref=openhardware.directory&product=adafruit-itsybitsy-rp2040&source=md-export)

## Protocols

- **I2C**: SDA=GPIO16, SCL=GPIO17
- **SPI**: MOSI=GPIO11, MISO=GPIO12, SCK=GPIO13
- **UART**: TX=GPIO1, RX=GPIO0
- **USB**
- **PIO**
- **PWM**
- **ADC**: ADC0=GPIO26, ADC1=GPIO27, ADC2=GPIO28, ADC3=GPIO29

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO26 | A0/ADC0 | — | ADC, GPIO, PWM |
| GPIO27 | A1/ADC1 | — | ADC, GPIO, PWM |
| GPIO28 | A2/ADC2 | — | ADC, GPIO, PWM |
| GPIO29 | A3/ADC3 | — | ADC, GPIO, PWM |
| GPIO0 | D0/RX | — | UART, GPIO, PWM |
| GPIO1 | D1/TX | — | UART, GPIO, PWM |
| GPIO16 | D2/SDA | — | I2C, GPIO, PWM |
| GPIO17 | D3/SCL | — | I2C, GPIO, PWM |
| GPIO12 | D4/MISO | — | SPI, GPIO, PWM |
| GPIO5 | D5/5V-level | — | GPIO |
| GPIO7 | D7 | — | GPIO, PWM |
| GPIO11 | D9/MOSI | — | SPI, GPIO, PWM |
| GPIO13 | D10/SCK | — | SPI, GPIO, PWM |
| GPIO11 | D11/LED | — | GPIO, PWM |
| GPIO2 | D12 | — | GPIO, PWM |
| GPIO3 | D13/CS | — | SPI, GPIO, PWM |
| GPIO4 | D14 | — | GPIO, PWM |
| GPIO6 | D15 | — | GPIO, PWM |
| GPIO8 | D16 | — | GPIO, PWM |
| GPIO9 | D17 | — | GPIO, PWM |
| GPIO10 | D18 | — | GPIO, PWM |
| GPIO14 | D19 | — | GPIO, PWM |
| GPIO15 | D20 | — | GPIO, PWM |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4888&ref=openhardware.directory&product=adafruit-itsybitsy-rp2040&source=md-export) — 9.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4888&ref=openhardware.directory&product=adafruit-itsybitsy-rp2040&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4888&ref=openhardware.directory&product=adafruit-itsybitsy-rp2040&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-itsybitsy-rp2040&ref=openhardware.directory&product=adafruit-itsybitsy-rp2040&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.org%2Frp2040%2Frp2040_datasheet.pdf&ref=openhardware.directory&product=adafruit-itsybitsy-rp2040&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_ItsyBitsy_RP2040&ref=openhardware.directory&product=adafruit-itsybitsy-rp2040&source=md-export)

## Tags

`itsybitsy`, `rp2040`, `raspberry-pi`, `circuitpython`, `micropython`, `pio`, `adafruit`, `compact`, `breadboard`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-itsybitsy-rp2040)

---

# NanoPC-T6 Plus

> FriendlyElec's flagship RK3588 SBC with 4x Cortex-A76 + 4x Cortex-A53 at 2.4GHz, up to 32GB LPDDR5, NVMe M.2, dual 2.5GbE, dual HDMI out + HDMI in, 6 TOPS NPU, 8K video, 40-pin GPIO, and USB-C PD power.

## Quick Facts

- **Brand:** FriendlyElec
- **Board Type:** sbc
- **Price:** ~$245
- **CPU:** ARM Cortex-A76 4x2.4GHz,Cortex-A53 4x1.8GHz, RK3588
- **RAM:** 8GB/16GB/32GB LPDDR5
- **Flash:** 32GB/64GB/256GB eMMC
- **USB:** USB-C,USB 3.0,2x USB 2.0
- **Power:** 12V DC via barrel jack or USB-C PD
- **Dimensions:** 110 × 82.5mm

## Connectivity

Ethernet 2x 2.5 Gigabit

## Compatible Firmware

- arduino

## Components

- **RK3588** (mcu): Rockchip RK3588 with 4x Cortex-A76 at 2.4GHz + 4x Cortex-A53 at 1.8GHz, Mali-G610 MP4 GPU, 6 TOPS NPU, and 8K video codec. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fuploads%2Fpdf%2F2022.8.26%2F192%2FRK3588%2520Brief%2520Datasheet.pdf&ref=openhardware.directory&product=nanopc-t6-plus&source=md-export)

## Protocols

- **SPI**: notes=2x SPI via 40-pin GPIO header
- **I2C**: notes=1x I2C via 40-pin GPIO header
- **UART**: notes=6x UART via 40-pin GPIO header + debug UART
- **PWM**: notes=8x PWM via 40-pin GPIO header
- **PCIe**: notes=M.2 M-Key PCIe 3.0 x4 for NVMe

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | Digital I/O | — | digital-input, digital-output |
| GPIO2 | Digital I/O | — | digital-input, digital-output |
| GPIO3 | Digital I/O | — | digital-input, digital-output |
| GPIO4 | Digital I/O / SPI | — | digital-input, digital-output |
| GPIO5 | Digital I/O / UART | — | digital-input, digital-output |
| GPIO6 | Digital I/O / PWM | — | digital-input, digital-output, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D315&ref=openhardware.directory&product=nanopc-t6-plus&source=md-export) — $245.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D315&ref=openhardware.directory&product=nanopc-t6-plus&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPC-T6_Plus&ref=openhardware.directory&product=nanopc-t6-plus&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ffriendlyarm%2Fsd-fuse_rk3588&ref=openhardware.directory&product=nanopc-t6-plus&source=md-export)

## Tags

`friendlyelec`, `nanopc`, `rk3588`, `sbc`, `8k`, `nvme`, `2.5gbe`, `npu`, `hdmi-in`

---
[View full device page](https://openhardware.directory/s/1370/nanopc-t6-plus)

---

# BigTreeTech SKR 3 EZ

> Advanced 32-bit 3D printer board with STM32H743VI @ 480MHz and EZ driver system (tool-free). 5 EZ driver slots, CAN/FDCAN, WiFi module support, 10A bed, 12–24V. Marlin, Klipper, RRF ready.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$44.99
- **CPU:** STM32H743VI
- **RAM:** 1MB
- **Flash:** 2MB
- **USB:** USB Type-C
- **Power:** 12-24V DC

## Connectivity

WiFi optional (ESP module)

## Compatible Firmware

- Marlin
- Klipper
- RepRapFirmware

## Components

- **STM32H743VI** (MCU): STMicroelectronics STM32H743VI 32-bit ARM Cortex-M7 microcontroller, 2MB flash, 1MB RAM, running at 480MHz with FDCAN bus support — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32h743vi.pdf&ref=openhardware.directory&product=bigtreetech-skr-3-ez&source=md-export)
- **BTT EZ Driver socket x5** (Stepper Driver Socket): 5x EZ driver sockets with 5V signal logic for tool-free, orientation-safe installation. Compatible with BTT EZ2209, EZ2208, EZ5160, EZ2130 drivers — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FSKR-3&ref=openhardware.directory&product=bigtreetech-skr-3-ez&source=md-export)
- **ESP32 (optional)** (Wireless Module): Optional WiFi connectivity via ESP-12S, ESP-07S, ESP32U, or ESP32E module for OctoPrint/Mainsail wireless access — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=bigtreetech-skr-3-ez&source=md-export)
- **MicroSD slot** (Storage): MicroSD card slot for firmware and print file storage — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-btt-skr-3-ez-control-board-mainboard-for-3d-printer&ref=openhardware.directory&product=bigtreetech-skr-3-ez&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**
- **CAN bus**
- **FDCAN**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-btt-skr-3-ez-control-board-mainboard-for-3d-printer&ref=openhardware.directory&product=bigtreetech-skr-3-ez&source=md-export) — $44.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FSKR-3&ref=openhardware.directory&product=bigtreetech-skr-3-ez&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-btt-skr-3-ez-control-board-mainboard-for-3d-printer&ref=openhardware.directory&product=bigtreetech-skr-3-ez&source=md-export)

## Tags

`3d-printer`, `control-board`, `stm32h7`, `marlin`, `klipper`, `reprapfirmware`, `bigtreetech`, `open-source`, `32-bit`, `ez-driver`, `can-bus`, `fdcan`, `wifi`, `tool-free`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-skr-3-ez)

---

# BigTreeTech S42C V1.0 Closed Loop Stepper Driver

> NEMA 17 (42mm) stepper motor closed-loop driver board with OLED display. Uses encoder feedback to eliminate missed steps and improve high-speed 3D printer and CNC motor performance.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** motor-driver
- **Price:** ~$19.86
- **CPU:** STM32F103C8T6
- **RAM:** 20KB
- **Flash:** 64KB
- **USB:** No
- **Power:** DC 12-24V via motor supply

## Compatible Firmware

- Marlin
- Klipper
- RepRapFirmware

## Components

- **OLED Display** (display): Small OLED display for real-time motor status, encoder feedback, and configuration — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=bigtreetech-s42c-v1-0-closed-loop-stepper-driver&source=md-export)
- **Magnetic Rotary Encoder** (encoder): High-speed magnetic rotary position sensor for closed-loop motor feedback — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fams.com%2Fdocuments%2F20143%2F36005%2FAS5047P_DS000324_3-00.pdf&ref=openhardware.directory&product=bigtreetech-s42c-v1-0-closed-loop-stepper-driver&source=md-export)

## Protocols

- **STEP/DIR/EN**
- **UART**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-s42c-v1-0-42-stepper-motor-closed-loop-driver-board-with-oled-display&ref=openhardware.directory&product=bigtreetech-s42c-v1-0-closed-loop-stepper-driver&source=md-export) — $19.86

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBIGTREETECH-S42B-V1.0&ref=openhardware.directory&product=bigtreetech-s42c-v1-0-closed-loop-stepper-driver&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-s42c-v1-0-42-stepper-motor-closed-loop-driver-board-with-oled-display&ref=openhardware.directory&product=bigtreetech-s42c-v1-0-closed-loop-stepper-driver&source=md-export)

## Tags

`stepper-driver`, `closed-loop`, `nema17`, `oled`, `3d-printer`, `cnc`, `bigtreetech`, `open-source`, `encoder`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-s42c-v1-0-closed-loop-stepper-driver)

---

# BigTreeTech Scylla V1.0

> STM32H723-based CNC engraving machine control board with 4x TMC2160 drivers (24-56V/4.7A RMS), RepRapFirmware support, ESP32 WiFi, USB-C, RS-485, CAN bus, VFD spindle control, and relay output.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** cnc-controller
- **Price:** ~$88
- **CPU:** STM32H723VGT6
- **RAM:** 564KB
- **Flash:** 1MB (internal),MicroSD
- **USB:** USB Type-C
- **Power:** V-Motor DC 24-56V 10A; V-MCU DC 24-56V 3A; V-MOS DC 24-56V 10A
- **Dimensions:** 164.34 × 104.65mm

## Connectivity

WiFi 802.11 b/g/n via onboard ESP32 module header

## Compatible Firmware

- RepRapFirmware
- grblHAL
- LinuxCNC (Remora, planned)

## Components

- **TMC2160 ×4** (motor-driver): Four Trinamic TMC2160 SPI-mode stepper drivers (X/Y/Z/A) supporting 24-56V and 4.7A RMS, with integrated heatsink — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.trinamic.com%2Ffileadmin%2Fassets%2FProducts%2FICs_Documents%2FTMC2160_Datasheet_V1.10.pdf&ref=openhardware.directory&product=bigtreetech-scylla-v1-0&source=md-export)
- **Mechanical Relay** (relay): Single mechanical relay with COM, NO, and NC terminals for controlling mains or external high-current devices — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FScylla&ref=openhardware.directory&product=bigtreetech-scylla-v1-0&source=md-export)
- **ESP32 WiFi Module Header** (wireless): Onboard header for ESP32 WiFi module enabling RRF wireless access and grblHAL telnet sender channel — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=bigtreetech-scylla-v1-0&source=md-export)

## Protocols

- **USB 2.0**
- **RS-485**
- **CAN**
- **I2C**
- **SPI**
- **UART**
- **WiFi 802.11 b/g/n**
- **PWM**
- **Modbus RTU (VFD)**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-scylla-v1-0&ref=openhardware.directory&product=bigtreetech-scylla-v1-0&source=md-export) — $88.00

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FScylla&ref=openhardware.directory&product=bigtreetech-scylla-v1-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-scylla-v1-0&ref=openhardware.directory&product=bigtreetech-scylla-v1-0&source=md-export)

## Tags

`cnc`, `reprapfirmware`, `stm32h723`, `tmc2160`, `stepper-driver`, `bigtreetech`, `open-source`, `rs-485`, `can-bus`, `vfd-control`, `engraving`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-scylla-v1-0)

---

# Pine64 PineCone BL602

> Open-source RISC-V evaluation board powered by the Bouffalo Lab BL602 WiFi+BLE5 SoC. Features 276KB SRAM, 2MB flash, USB-C with CH340 serial bridge, onboard RGB LED, JTAG header, and PCB antenna. Supports Arduino, NuttX, FreeRTOS, Rust, and OpenBeken firmware. Priced from $3.99.

## Quick Facts

- **Brand:** Pine64
- **Board Type:** evaluation-board
- **Price:** ~$3.99
- **CPU:** Bouffalo Lab BL602
- **RAM:** 276 KB SRAM
- **Flash:** 2 MB
- **GPIO:** 16 pins
- **USB:** USB-C (USB 2.0 via CH340)
- **Power:** USB-C 5V
- **Dimensions:** 25.4 mm × 44.0 mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- nuttx
- freertos
- rust-embedded
- openbeken
- zephyr

## Components

- **BL602** (MCU): 32-bit RISC-V WiFi+BLE5 SoC at 192MHz with 276KB SRAM, 128KB ROM, 2MB flash, integrated RF — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Fdatasheet%2Fpine64%2FBL602_BL604_DS_1.2_en.pdf&ref=openhardware.directory&product=pine64-pinecone-bl602&source=md-export)
- **CH340** (USB-serial-bridge): USB Full-Speed to UART adapter for programming and serial console — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fdatasheets%2FDev%2FArduino%2FOther%2FCH340DS1.PDF&ref=openhardware.directory&product=pine64-pinecone-bl602&source=md-export)
- **RGB LED** (LED): Tri-color LED — Red (GPIO17), Green (GPIO14), Blue (GPIO11) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2FPinenut%2FPine64%2520BL602%2520EVB%2520Schematic%2520ver%25201.1.pdf&ref=openhardware.directory&product=pine64-pinecone-bl602&source=md-export)
- **PCB Antenna** (antenna): Integrated 2.4GHz PCB antenna for WiFi and BLE — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2FPinenut%2FPine64%2520BL602%2520EVB%2520Schematic%2520ver%25201.1.pdf&ref=openhardware.directory&product=pine64-pinecone-bl602&source=md-export)

## Protocols

- **UART0**: TX=GPIO16, RX=GPIO7
- **UART1**: TX=GPIO4, RX=GPIO3
- **I2C**: SDA=GPIO3, SCL=GPIO4
- **SPI**: MOSI=GPIO1, MISO=GPIO0, SCLK=GPIO3, CS=GPIO2
- **JTAG**: TDI=GPIO17, TDO=GPIO11, TMS=GPIO12, TCK=GPIO14

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | SPI MISO (default) | — | digital-input, digital-output, pwm, spi, i2c, uart |
| GPIO1 | SPI MOSI (default) | — | digital-input, digital-output, pwm, spi, i2c, uart |
| GPIO2 | SPI CS (default) | — | digital-input, digital-output, pwm, spi, i2c, uart |
| GPIO3 | I2C SDA / UART1 RX / SPI SCLK | — | digital-input, digital-output, pwm, spi, i2c, uart |
| GPIO4 | I2C SCL / UART1 TX | — | digital-input, digital-output, pwm, adc, spi, i2c, uart |
| GPIO5 | General IO / ADC CH4 | — | digital-input, digital-output, pwm, adc, spi, i2c, uart |
| GPIO7 | UART0 RX (default) | — | digital-input, digital-output, pwm, spi, i2c, uart |
| GPIO8 | Boot mode jumper | — | digital-input, digital-output, pwm, spi, i2c, uart |
| GPIO11 | Blue LED / JTAG TDO | — | digital-input, digital-output, pwm, adc, spi, i2c, uart |
| GPIO12 | JTAG TMS / IR RX | — | digital-input, digital-output, pwm, adc, spi, i2c, uart |
| GPIO14 | Green LED / JTAG TCK / DAC | — | digital-input, digital-output, pwm, adc, dac, spi, i2c, uart |
| GPIO16 | UART0 TX (default) | — | digital-input, digital-output, pwm, spi, i2c, uart |
| GPIO17 | Red LED / JTAG TDI | — | digital-input, digital-output, pwm, spi, i2c, uart |
| GPIO20 | General IO | — | digital-input, digital-output, pwm, spi, i2c, uart |
| GPIO21 | General IO | — | digital-input, digital-output, pwm, spi, i2c, uart |
| GPIO22 | General IO | — | digital-input, digital-output, pwm, spi, i2c, uart |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No
- **License:** Apache-2.0

## Where to Buy

- [Pine64 Store](https://openhardware.directory/r?to=https%3A%2F%2Fpine64.com%2Fproduct%2Fpinecone-bl602-evaluation-board%2F&ref=openhardware.directory&product=pine64-pinecone-bl602&source=md-export) — $3.99

## Available Software

- [BL IoT SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbouffalolab%2Fbl_iot_sdk&ref=openhardware.directory&product=pine64-pinecone-bl602&source=md-export) (SDK)
- [ArduinoCore-bouffalo](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fpine64%2FArduinoCore-bouffalo&ref=openhardware.directory&product=pine64-pinecone-bl602&source=md-export) (Framework)
- [bl602-hal (Rust)](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsipeed%2Fbl602-hal&ref=openhardware.directory&product=pine64-pinecone-bl602&source=md-export) (Library)
- [OpenBeken](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fopenshwprojects%2FOpenBK7231T_App&ref=openhardware.directory&product=pine64-pinecone-bl602&source=md-export) (Firmware)
- [blflash](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fspacemeowx2%2Fblflash&ref=openhardware.directory&product=pine64-pinecone-bl602&source=md-export) (Tool)
- [Bouffalo SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbouffalolab%2Fbouffalo_sdk&ref=openhardware.directory&product=pine64-pinecone-bl602&source=md-export) (SDK)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fpine64.com%2Fproduct%2Fpinecone-bl602-evaluation-board%2F&ref=openhardware.directory&product=pine64-pinecone-bl602&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fpine64%2Fbl602-docs&ref=openhardware.directory&product=pine64-pinecone-bl602&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.pine64.org%2Fwiki%2FPineCone&ref=openhardware.directory&product=pine64-pinecone-bl602&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Fdatasheet%2Fpine64%2FBL602_BL604_DS_1.2_en.pdf&ref=openhardware.directory&product=pine64-pinecone-bl602&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2FPinenut%2FPine64%2520BL602%2520EVB%2520Schematic%2520ver%25201.1.pdf&ref=openhardware.directory&product=pine64-pinecone-bl602&source=md-export)

## Tags

`risc-v`, `wifi`, `ble`, `iot`, `bl602`, `pine64`, `open-source`

---
[View full device page](https://openhardware.directory/s/1370/pine64-pinecone-bl602)

---

# Milk-V Jupiter2

> First RVA23-compliant RISC-V SBC with octa-core SpacemiT K3 @ 2.4GHz, up to 32GB LPDDR5, 60 TOPS AI accelerator, WiFi 6/BT 5.2, 10GbE SFP+, real-time processor.

## Quick Facts

- **Brand:** Milk-V
- **Board Type:** SBC
- **CPU:** SpacemiT K3
- **RAM:** Up to 32GB LPDDR5
- **Flash:** Up to 256GB UFS
- **USB:** 2x USB 3.2 Type-C,4x USB 2.0
- **Power:** USB-C PD 65W,12V ATX

## Connectivity

WiFi WiFi 6 | Bluetooth 5.2 | Ethernet 1GbE, 10GbE SFP

## Components

- **SpacemiT K3** (Processor): Eight X100 RISC-V cores at up to 2.4GHz with quad-issue out-of-order pipeline, 8MB shared L2, RVA23 compliance, and hardware virtualization — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-resource.spacemit.com%2Ffile%2Fchip%2FK3%2FK3_brief_en.pdf&ref=openhardware.directory&product=milk-v-jupiter2&source=md-export)
- **SpacemiT A100** (NPU): 8-core A100 AI processor delivering up to 60 TOPS with 1024-bit RVV 1.0 vector processing, supporting INT4/INT8/FP8/INT16/FP16/BF16 precision — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-resource.spacemit.com%2Ffile%2Fchip%2FK3%2FK3_brief_en.pdf&ref=openhardware.directory&product=milk-v-jupiter2&source=md-export)
- **IMG BXM-4-64-MC1** (GPU): Imagination BXM-4-64-MC1 GPU supporting OpenGL ES 3.2, OpenCL 3.0, and Vulkan 1.3 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.imaginationtech.com%2Fproduct%2Fimg-bxm-4-64-mc1%2F&ref=openhardware.directory&product=milk-v-jupiter2&source=md-export)
- **RT24** (MCU): Dual-core RT24 64-bit RISC-V real-time processor supporting UART, I2C, I2S, CAN-FD, PWM, and GPIO — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-resource.spacemit.com%2Ffile%2Fchip%2FK3%2FK3_brief_en.pdf&ref=openhardware.directory&product=milk-v-jupiter2&source=md-export)

## Protocols

- **PCIe Gen3**
- **DisplayPort**
- **NVMe**
- **CAN-FD**
- **I2C**
- **UART**
- **I2S**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fmilkv.io%2Fjupiter2&ref=openhardware.directory&product=milk-v-jupiter2&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-resource.spacemit.com%2Ffile%2Fchip%2FK3%2FK3_brief_en.pdf&ref=openhardware.directory&product=milk-v-jupiter2&source=md-export)

## Tags

`risc-v`, `sbc`, `linux`, `ai`, `wifi`, `bluetooth`, `10gbe`, `milkv`, `spacemit`, `rva23`, `60tops`

---
[View full device page](https://openhardware.directory/s/1370/milk-v-jupiter2)

---

# madflight FC3v2 RP2350B Flight Controller

> Open-source flight controller board with RP2350B MCU, 10-DOF sensor suite (gyro, accelerometer, barometer, magnetometer), INA226 battery monitor, microSD with 4-bit SDIO, and DC-DC converter. 50.7x41.6mm, 6.3g.

## Quick Facts

- **Brand:** madflight
- **Board Type:** flight-controller
- **Price:** ~$29
- **CPU:** RP2350B dual-core ARM Cortex-M33 @ 150MHz
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **GPIO:** 48 pins
- **USB:** USB-C (native USB CDC)
- **Power:** 3-5.5V direct or 6.5-20V via DC-DC converter (5V/2A output)
- **Dimensions:** 50.7 x 41.6 mm

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- madflight
- betaflight
- arduino
- platformio

## Components

- **RP2350B** (mcu): Raspberry Pi RP2350B with dual ARM Cortex-M33 or dual Hazard3 RISC-V cores at 150MHz, 520KB SRAM, 48 GPIO pins in QFN-80 package — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=madflight-fc3v2-rp2350b&source=md-export)
- **LSM6DSV16B** (accelerometer): STMicroelectronics high-performance 6-axis IMU with accelerometer and gyroscope, sensor fusion core, and machine learning core — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flsm6dsv16b.pdf&ref=openhardware.directory&product=madflight-fc3v2-rp2350b&source=md-export)
- **BMP580** (environmental-sensor): Bosch Sensortec high-precision barometric pressure sensor with 2cm altitude noise at 85Hz output data rate, ideal for drone altitude hold — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fproducts%2Fenvironmental-sensors%2Fpressure-sensors%2Fbmp580%2F&ref=openhardware.directory&product=madflight-fc3v2-rp2350b&source=md-export)
- **MMC5603NJ** (magnetometer): MEMSIC 3-axis magnetic sensor with 20-bit resolution, 0.0625mG per LSB sensitivity, 2mG RMS noise, and 1-degree heading accuracy — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.memsic.com%2FPublic%2FUploads%2Fuploadfile%2Ffiles%2F20220119%2FMMC5603NJDatasheetRev.B.pdf&ref=openhardware.directory&product=madflight-fc3v2-rp2350b&source=md-export)
- **INA226** (battery-gauge): Texas Instruments 16-bit digital current and power monitor with I2C interface, measuring up to 36V at 1.25mV resolution and 40A at 1.25mA resolution — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fina226.pdf&ref=openhardware.directory&product=madflight-fc3v2-rp2350b&source=md-export)
- **WS2812B** (led-driver): Worldsemi addressable RGB LED with integrated driver for visual status indication and programmable lighting effects — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=madflight-fc3v2-rp2350b&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **SDIO**
- **PWM**
- **ADC**
- **USB CDC**
- **DSHOT**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO 0-1 | SER0 (radio receiver UART) | — | — |
| GPIO 2-3 | I2C1 (external: GPS module) | — | — |
| GPIO 4-5 | SER1 (GPS serial) | — | — |
| GPIO 6-9 | OUT0-OUT3 (motor ESC outputs) | — | — |
| GPIO 10-17 | OUT4-OUT11 (additional outputs) | — | — |
| GPIO 26-27 | IMU SPI clock and interrupt | — | — |
| GPIO 28-31 | IMU SPI data (MISO/MOSI/CS) | — | — |
| GPIO 32-33 | I2C0 (internal: barometer, magnetometer, battery monitor) | — | — |
| GPIO 34-39 | SD card (4-bit SDIO interface) | — | — |
| GPIO 40-43 | ADC inputs | — | — |
| GPIO 44 | Vbat voltage divider | — | — |
| GPIO 45 | Blue LED | — | — |
| GPIO 46 | WS2812B RGB LED | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** MIT

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fmadflight%2Fflight-controller-raspberry-pi-rp2350b%2F&ref=openhardware.directory&product=madflight-fc3v2-rp2350b&source=md-export) — $29.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fmadflight.com%2FBoard-FC3%2F&ref=openhardware.directory&product=madflight-fc3v2-rp2350b&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fqqqlab%2Fmadflight&ref=openhardware.directory&product=madflight-fc3v2-rp2350b&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fmadflight.com%2FBoard-FC3%2F&ref=openhardware.directory&product=madflight-fc3v2-rp2350b&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=madflight-fc3v2-rp2350b&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fqqqlab%2Fmadflight&ref=openhardware.directory&product=madflight-fc3v2-rp2350b&source=md-export)

## Tags

`flight-controller`, `rp2350b`, `open-source-hardware`, `drone`, `imu`, `10-dof`, `quadcopter`, `arduino`, `platformio`, `madflight`, `raspberry-pi`

---
[View full device page](https://openhardware.directory/s/1370/madflight-fc3v2-rp2350b)

---

# ACEBOTT QD001 Smart Robot Car

> ESP32-powered 4WD mecanum wheel robot car kit with ultrasonic, IR, and line-tracking sensors. Programmable via Arduino, ACECode, and Python. Expandable with camera, AI, tank, robot arm, and GPS packs.

## Quick Facts

- **Brand:** ACEBOTT
- **Board Type:** robot
- **Price:** ~$83.95
- **CPU:** ESP32-WROOM-32
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **Power:** Rechargeable battery pack

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- Python

## Components

- **HC-SR04 Ultrasonic Sensor** (Sensor): HC-SR04 ultrasonic ranging module for obstacle detection and distance measurement with 2cm-400cm range — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fdatasheets%2FSensors%2FProximity%2FHCSR04.pdf&ref=openhardware.directory&product=acebott-qd001-smart-robot-car&source=md-export)
- **IR Receiver** (Sensor): Infrared receiver for IR remote control functionality, enabling wireless control via included remote — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.vishay.com%2Fdocs%2F82491%2Ftsop382.pdf&ref=openhardware.directory&product=acebott-qd001-smart-robot-car&source=md-export)
- **Line-Tracking Sensors** (Sensor): Infrared reflective sensors for line detection and following, supporting multiple route tracking patterns — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.acebott.com%2Fproducts%2Facebott-qd001-smart-robot-car-kit&ref=openhardware.directory&product=acebott-qd001-smart-robot-car&source=md-export)
- **TT Mecanum Motors** (Motor): Four DC gear motors paired with mecanum wheels enabling omnidirectional movement including lateral, diagonal, and rotational motion — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.acebott.com%2Fproducts%2Facebott-qd001-smart-robot-car-kit&ref=openhardware.directory&product=acebott-qd001-smart-robot-car&source=md-export)

## Protocols

- **I2C**
- **UART**
- **GPIO**
- **SPI**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenElab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Facebott-qd001-smart-robot-car&ref=openhardware.directory&product=acebott-qd001-smart-robot-car&source=md-export) — $83.95
- [ACEBOTT](https://openhardware.directory/r?to=https%3A%2F%2Fwww.acebott.com%2Fproducts%2Fqd001&ref=openhardware.directory&product=acebott-qd001-smart-robot-car&source=md-export) — $83.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.acebott.com%2Fproducts%2Facebott-qd001-smart-robot-car-kit&ref=openhardware.directory&product=acebott-qd001-smart-robot-car&source=md-export)

## Tags

`esp32`, `mecanum-wheels`, `4wd`, `arduino`, `stem`, `education`, `robot-car`, `expandable`, `acebott`

---
[View full device page](https://openhardware.directory/s/1370/acebott-qd001-smart-robot-car)

---

# WS2812B RGB LED Ring (12-Bit, 50mm)

> 12-LED addressable WS2812B RGB ring in a 50mm form factor, running on 5V with single-wire data control — perfect for status indicators, wearables, and visual effects.

## Quick Facts

- **Brand:** OpenELab
- **Board Type:** module
- **Price:** ~$5.99
- **CPU:** N/A (passive LED module)
- **RAM:** N/A
- **Flash:** N/A
- **Power:** 5V DC

## Components

- **WS2812B** (LED): Individually addressable RGB LED with integrated driver IC, 24-bit color, 800kbps data rate — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=ws2812b-rgb-led-ring&source=md-export)

## Protocols

- **Single-Wire**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fled-ring-rgb&ref=openhardware.directory&product=ws2812b-rgb-led-ring&source=md-export) — $5.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fled-ring-rgb&ref=openhardware.directory&product=ws2812b-rgb-led-ring&source=md-export)

## Tags

`led-ring`, `ws2812b`, `neopixel`, `rgb`, `addressable-led`, `visual-effects`

---
[View full device page](https://openhardware.directory/s/1370/ws2812b-rgb-led-ring)

---

# Grasshopper LoRaWAN Development Board

> Ultra-compact 18x45mm LoRaWAN development board from Tlera Corp featuring Murata's FCC-certified CMWX1ZZABZ-078 module with STM32L082 Cortex-M0+ MCU and SX1276 LoRa radio, drawing just 2 uA in stop mode.

## Quick Facts

- **Brand:** Tlera Corp
- **Board Type:** dev-board
- **Price:** ~$39.95
- **CPU:** ARM Cortex-M0+ single-core @ 32MHz, HW crypto (AES-128/256)
- **RAM:** 20KB SRAM
- **Flash:** 192KB
- **GPIO:** 19 pins
- **USB:** Micro-USB
- **Power:** 5V via Micro-USB / 3.5-5.5V VIN
- **Dimensions:** 18 x 45mm

## Compatible Firmware

- arduino

## Components

- **stm32l082cz** (mcu): Ultra-low-power ARM Cortex-M0+ MCU with 192KB flash, 20KB RAM, AES-128/256 hardware crypto, running at up to 32 MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32l082kb.pdf&ref=openhardware.directory&product=grasshopper-lorawan-development-board&source=md-export)
- **sx1276** (radio): Semtech LoRa/FSK sub-GHz transceiver covering 137-1020 MHz with -148 dBm sensitivity and +20 dBm output power — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3179%2Fsx1276_77_78_79.pdf&ref=openhardware.directory&product=grasshopper-lorawan-development-board&source=md-export)
- **cmwx1zzabz-078** (module): Murata FCC-certified LoRa module integrating STM32L082 MCU and SX1276 radio in a compact 12.5 x 11.6 x 1.76mm package — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.murata.com%2Fproducts%2Fproductdata%2F8822549676062%2FTYPEABZ.pdf&ref=openhardware.directory&product=grasshopper-lorawan-development-board&source=md-export)
- **ncv8170** (voltage-regulator): ON Semiconductor ultra-low quiescent current (500 nA) 3.3V 150mA LDO voltage regulator — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.onsemi.com%2Fpdf%2Fdatasheet%2Fncv8170-d.pdf&ref=openhardware.directory&product=grasshopper-lorawan-development-board&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **ADC**
- **DAC**
- **PWM**
- **SWD**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | — | — | Digital, USART1 RX |
| D1 | — | — | Digital, USART1 TX |
| D2 | — | — | Digital, PWM (TIM22 CH2) |
| D3 | — | — | Digital |
| D4 | — | — | Digital |
| D5 | — | — | Digital |
| D8 | — | — | Digital, LPUART1 RX, SWDIO |
| D9 | — | — | Digital, LPUART1 TX, SWCLK |
| D10 | — | — | Digital, SPI2 NSS |
| D11 | — | — | Digital, SPI2 MOSI |
| D12 | — | — | Digital, SPI2 MISO |
| D13 | — | — | Digital, SPI2 SCK |
| SDA | — | — | I2C1 SDA |
| SCL | — | — | I2C1 SCL |
| A0 | — | — | ADC CH4, DAC1, USART2 CK |
| A1 | — | — | ADC CH5, DAC2 |
| A2 | — | — | ADC CH2, PWM (TIM2 CH3), USART2 TX |
| A3 | — | — | ADC CH3, PWM (TIM2 CH4), USART2 RX |
| A4 | — | — | ADC CH0, PWM (TIM2 CH1), USART2 CTS, WKUP1 |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Ftleracorp%2Fgrasshopper-lorawan-development-board%2F&ref=openhardware.directory&product=grasshopper-lorawan-development-board&source=md-export) — $39.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Ftleracorp%2Fgrasshopper-lorawan-development-board%2F&ref=openhardware.directory&product=grasshopper-lorawan-development-board&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fkriswiner%2FCMWX1ZZABZ&ref=openhardware.directory&product=grasshopper-lorawan-development-board&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fhackaday.io%2Fproject%2F35169-hackable-cmwx1zzabz-lora-devices&ref=openhardware.directory&product=grasshopper-lorawan-development-board&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.murata.com%2Fproducts%2Fproductdata%2F8822549676062%2FTYPEABZ.pdf&ref=openhardware.directory&product=grasshopper-lorawan-development-board&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fwww.oshpark.com%2Fshared_projects%2FsszdyuZp&ref=openhardware.directory&product=grasshopper-lorawan-development-board&source=md-export)

## Tags

`lora`, `lorawan`, `stm32`, `cortex-m0`, `low-power`, `iot`, `murata`, `sx1276`, `arduino`, `tlera-corp`, `868mhz`, `915mhz`

## Certifications

FCC

---
[View full device page](https://openhardware.directory/s/1370/grasshopper-lorawan-development-board)

---

# DFRobot Beetle CM-32U4

> Ultra-compact Arduino Leonardo-compatible microcontroller board with ATmega32U4, integrated lithium battery charging, and native USB in a tiny 22x20.5mm form factor.

## Quick Facts

- **Brand:** DFRobot
- **Price:** ~$8.9
- **CPU:** AVR 8-bit single-core @ 16MHz
- **RAM:** 2.5KB SRAM
- **Flash:** 32KB
- **USB:** Micro-USB (native USB 2.0 Full-speed)
- **Power:** 5V USB / LiPo battery (BAT pin) / 5V external (VIN)
- **Dimensions:** 22 × 20.5mm

## Components

- **ATmega32U4** (mcu): Microchip ATmega32U4 running at 16MHz with 32KB flash, 2.5KB SRAM, 1KB EEPROM, native USB 2.0 Full-speed device, 12-channel 10-bit ADC, and JTAG debug interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2Fdevicedoc%2Fatmel-7766-8-bit-avr-atmega16u4-32u4_datasheet.pdf&ref=openhardware.directory&product=dfrobot-beetle-cm-32u4&source=md-export)
- **TP4056X** (battery-charger): Linear lithium battery charger with programmable charge current of 200-600mA and thermal regulation for safe LiPo charging. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdlnmh9ip6v2uc.cloudfront.net%2Fdatasheets%2FPrototyping%2FTP4056.pdf&ref=openhardware.directory&product=dfrobot-beetle-cm-32u4&source=md-export)

## Protocols

- **SPI** (SPI0): MOSI=MOSI, MISO=MISO, SCK=SCK
- **I2C** (I2C0): SDA=D1, SCL=D0
- **UART** (Serial1): TX=D1, RX=D0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX / I2C SCL | — | digital-input, digital-output |
| D1 | UART TX / I2C SDA | — | digital-input, digital-output |
| D9 | Digital / PWM / Analog (A9) | — | digital-input, digital-output, pwm, adc |
| D10 | Digital / PWM / Analog (A10) | — | digital-input, digital-output, pwm, adc |
| D11 | Digital / PWM | — | digital-input, digital-output, pwm |
| A0 | Analog Input | — | digital-input, digital-output, adc |
| A1 | Analog Input | — | digital-input, digital-output, adc |
| A2 | Analog Input | — | digital-input, digital-output, adc |
| MOSI | SPI MOSI | — | digital-input, digital-output |
| MISO | SPI MISO | — | digital-input, digital-output |
| SCK | SPI Clock | — | digital-input, digital-output |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2475.html&ref=openhardware.directory&product=dfrobot-beetle-cm-32u4&source=md-export) — $8.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2475.html&ref=openhardware.directory&product=dfrobot-beetle-cm-32u4&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FBeetle_CM_32U4_SKU_DFR0816&ref=openhardware.directory&product=dfrobot-beetle-cm-32u4&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2Fdevicedoc%2Fatmel-7766-8-bit-avr-atmega16u4-32u4_datasheet.pdf&ref=openhardware.directory&product=dfrobot-beetle-cm-32u4&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdfimg.dfrobot.com%2Fnobody%2Fwiki%2Fca0e40f37bf29ee0d43170b1cb62aba1.PDF&ref=openhardware.directory&product=dfrobot-beetle-cm-32u4&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-beetle-cm-32u4)

---

# Adafruit Feather M0 WiFi (ATSAMD21 + ATWINC1500)

> ARM Cortex-M0+ Feather board with ATWINC1500 802.11 b/g/n WiFi, 256KB flash, 32KB RAM, 10 analog inputs, and built-in LiPo charger. FCC-certified WiFi for IoT and connected projects.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$39.95
- **CPU:** ATSAMD21G18 ARM Cortex-M0+ @ 48 MHz
- **RAM:** 32KB SRAM
- **Flash:** 256KB
- **Power:** 5V + LiPo
- **Dimensions:** 53.65 × 22.8 × 8 mm

## Connectivity

WiFi 802.11 b/g/n

## Compatible Firmware

- arduino

## Components

- **ATSAMD21G18** (mcu): ARM Cortex-M0+ at 48MHz, 256KB flash, 32KB SRAM, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fsystem%2Fassets%2Fassets%2F000%2F030%2F130%2Foriginal%2Fatmel-42181-sam-d21_datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-m0-wifi&source=md-export)
- **ATWINC1500** (wifi-module): FCC-certified 802.11b/g/n WiFi module with SSL/TLS 1.2 support, controlled via SPI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.microchip.com%2Fen-us%2Fproduct%2Fatwinc1500&ref=openhardware.directory&product=adafruit-feather-m0-wifi&source=md-export)

## Protocols

- **SPI**: MOSI=PA16, MISO=PA19, SCK=PA17
- **I2C**: SDA=PA22, SCL=PA23
- **UART**: TX=PA10, RX=PA11
- **802.11 b/g/n**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA11 | RX — UART Receive | — | digital-input, digital-output |
| PA10 | TX — UART Transmit | — | digital-input, digital-output |
| PA15 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA20 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA07 | D9 — GPIO / PWM / Analog | — | digital-input, digital-output, pwm, analog-input |
| PA18 | D10 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA16 | D11 — SPI MOSI | — | digital-input, digital-output |
| PA19 | D12 — SPI MISO | — | digital-input, digital-output |
| PA17 | D13 — SPI SCK / LED | — | digital-input, digital-output |
| PA22 | SDA — I2C Data | — | digital-input, digital-output |
| PA23 | SCL — I2C Clock | — | digital-input, digital-output |
| PA02 | A0 — Analog In / DAC Out | — | analog-input, analog-output |
| PB08 | A1 — Analog In | — | analog-input |
| PB09 | A2 — Analog In | — | analog-input |
| PA04 | A3 — Analog In | — | analog-input |
| PA05 | A4 — Analog In | — | analog-input |
| PB02 | A5 — Analog In | — | analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3010&ref=openhardware.directory&product=adafruit-feather-m0-wifi&source=md-export) — 39.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3010&ref=openhardware.directory&product=adafruit-feather-m0-wifi&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-M0-WiFi-WINC1500-PCB&ref=openhardware.directory&product=adafruit-feather-m0-wifi&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-m0-wifi-atwinc1500%2Foverview&ref=openhardware.directory&product=adafruit-feather-m0-wifi&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fsystem%2Fassets%2Fassets%2F000%2F030%2F130%2Foriginal%2Fatmel-42181-sam-d21_datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-m0-wifi&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fassets%2Fassets%2F000%2F032%2F983%2Fmedium800%2Ffeather_schem.png&ref=openhardware.directory&product=adafruit-feather-m0-wifi&source=md-export)

## Tags

`feather`, `wifi`, `arm-cortex-m0`, `atsamd21`, `atwinc1500`, `iot`, `lipo-charger`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-m0-wifi)

---

# Arduino Uno Ethernet

> Arduino UNO with built-in Ethernet and microSD slot based on the ATmega328P at 16 MHz — a self-contained board for networked Arduino projects without needing a separate Ethernet shield.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$65
- **CPU:** ATmega328P @ 16 MHz
- **RAM:** 2 KB
- **Flash:** 32 KB
- **Power:** 7-12V DC barrel jack or FTDI 5V
- **Dimensions:** Arduino UNO form factor

## Connectivity

Ethernet 10/100 Mbps

## Compatible Firmware

- arduino
- platformio

## Components

- **ATmega328P** (mcu): 8-bit AVR microcontroller at 16 MHz with 32KB flash, 2KB SRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf&ref=openhardware.directory&product=arduino-uno-ethernet&source=md-export)
- **W5100** (ethernet): Wiznet W5100 hardwired TCP/IP embedded Ethernet controller with 10/100 Ethernet support — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wiznet.io%2Fwp-content%2Fuploads%2Fwiznethome%2FChip%2FW5100%2FDocument%2FW5100_Datasheet_v1.2.7.pdf&ref=openhardware.directory&product=arduino-uno-ethernet&source=md-export)

## Protocols

- **UART**: TX=D1, RX=D0
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, ETH_CS=D10, SD_CS=D4
- **I2C**: SDA=A4, SCL=A5
- **ICSP**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX | — | digital-input, digital-output |
| D1 | TX | — | digital-input, digital-output |
| D2 | GPIO / INT0 | — | digital-input, digital-output, interrupt |
| D3 | GPIO / INT1 / PWM | — | digital-input, digital-output, pwm, interrupt |
| D4 | SD_CS | — | digital-input, digital-output |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D7 | GPIO | — | digital-input, digital-output |
| D8 | GPIO | — | digital-input, digital-output |
| D9 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D10 | ETH_CS / PWM | — | digital-input, digital-output, pwm |
| D11 | MOSI / PWM | — | digital-input, digital-output, pwm |
| D12 | MISO | — | digital-input, digital-output |
| D13 | SCK | — | digital-input, digital-output |
| A0 | Analog 0 / D14 | — | analog-input, digital-input, digital-output |
| A1 | Analog 1 / D15 | — | analog-input, digital-input, digital-output |
| A2 | Analog 2 / D16 | — | analog-input, digital-input, digital-output |
| A3 | Analog 3 / D17 | — | analog-input, digital-input, digital-output |
| A4 | SDA / Analog 4 / D18 | — | analog-input, digital-input, digital-output |
| A5 | SCL / Analog 5 / D19 | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB006UT97FE&ref=openhardware.directory&product=arduino-uno-ethernet&source=md-export) — $59.00

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F418&ref=openhardware.directory&product=arduino-uno-ethernet&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fretired%2Fboards%2Farduino-ethernet-rev3-without-poe&ref=openhardware.directory&product=arduino-uno-ethernet&source=md-export)

## Tags

`arduino`, `atmega328p`, `ethernet`, `microsd`, `iot`, `networking`

---
[View full device page](https://openhardware.directory/s/1370/arduino-uno-ethernet)

---

# Adafruit Feather M0 WiFi with uFL

> Variant of the Feather M0 WiFi (ATSAMD21 + ATWINC1500) with a u.FL antenna connector instead of a PCB trace antenna, allowing use of an external antenna for improved WiFi range.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$34.95
- **CPU:** ATSAMD21G18 ARM Cortex-M0+ @ 48 MHz
- **RAM:** 32KB SRAM
- **Flash:** 256KB
- **Power:** 5V + LiPo
- **Dimensions:** 53.65 × 22.8 × 8 mm

## Connectivity

WiFi 802.11 b/g/n

## Compatible Firmware

- arduino

## Components

- **ATSAMD21G18** (mcu): ARM Cortex-M0+ at 48MHz, 256KB flash, 32KB SRAM, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fsystem%2Fassets%2Fassets%2F000%2F030%2F130%2Foriginal%2Fatmel-42181-sam-d21_datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-m0-wifi-ufl&source=md-export)
- **ATWINC1500** (wifi-module): FCC-certified 802.11b/g/n WiFi module with SSL/TLS 1.2 support, controlled via SPI. uFL connector for external antenna. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.microchip.com%2Fen-us%2Fproduct%2Fatwinc1500&ref=openhardware.directory&product=adafruit-feather-m0-wifi-ufl&source=md-export)

## Protocols

- **SPI**: MOSI=PA16, MISO=PA19, SCK=PA17
- **I2C**: SDA=PA22, SCL=PA23
- **UART**: TX=PA10, RX=PA11
- **802.11 b/g/n**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA11 | RX — UART Receive | — | digital-input, digital-output |
| PA10 | TX — UART Transmit | — | digital-input, digital-output |
| PA15 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA20 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA07 | D9 — GPIO / PWM / Analog | — | digital-input, digital-output, pwm, analog-input |
| PA18 | D10 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA16 | D11 — SPI MOSI | — | digital-input, digital-output |
| PA19 | D12 — SPI MISO | — | digital-input, digital-output |
| PA17 | D13 — SPI SCK / LED | — | digital-input, digital-output |
| PA22 | SDA — I2C Data | — | digital-input, digital-output |
| PA23 | SCL — I2C Clock | — | digital-input, digital-output |
| PA02 | A0 — Analog In / DAC Out | — | analog-input, analog-output |
| PB08 | A1 — Analog In | — | analog-input |
| PB09 | A2 — Analog In | — | analog-input |
| PA04 | A3 — Analog In | — | analog-input |
| PA05 | A4 — Analog In | — | analog-input |
| PB02 | A5 — Analog In | — | analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3061&ref=openhardware.directory&product=adafruit-feather-m0-wifi-ufl&source=md-export) — 34.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3061&ref=openhardware.directory&product=adafruit-feather-m0-wifi-ufl&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-M0-WiFi-WINC1500-PCB&ref=openhardware.directory&product=adafruit-feather-m0-wifi-ufl&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-m0-wifi-atwinc1500%2Foverview&ref=openhardware.directory&product=adafruit-feather-m0-wifi-ufl&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fsystem%2Fassets%2Fassets%2F000%2F030%2F130%2Foriginal%2Fatmel-42181-sam-d21_datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-m0-wifi-ufl&source=md-export)

## Tags

`feather`, `wifi`, `ufl`, `arm-cortex-m0`, `atsamd21`, `atwinc1500`, `external-antenna`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-m0-wifi-ufl)

---

# Pycom Pysense

> Multi-sensor expansion board for Pycom modules featuring light, barometric pressure, humidity, temperature, and 3-axis accelerometer sensors. Includes MicroSD slot, USB serial, LiPo charger, and ultra-low 1µA deep sleep.

## Quick Facts

- **Brand:** Pycom
- **Board Type:** IoT Sensor Board
- **Price:** ~$34.95
- **CPU:** N/A (expansion board — CPU provided by attached Pycom module)
- **RAM:** N/A (provided by host module)
- **Flash:** N/A (provided by host module)
- **Power:** 5V via USB or LiPo battery via JST connector
- **Dimensions:** 55mm × 35mm × 10mm

## Compatible Firmware

- micropython

## Components

- **LIS2HH12** (imu): 12-bit 3-axis MEMS accelerometer for motion detection and orientation sensing. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flis2hh12.pdf&ref=openhardware.directory&product=pycom-pysense&source=md-export)
- **MPL3115A2** (sensor): MEMS pressure sensor with 20-bit data, barometric pressure and temperature output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FMPL3115A2.pdf&ref=openhardware.directory&product=pycom-pysense&source=md-export)
- **SI7006-A20** (sensor): Relative humidity and temperature sensor with I2C digital output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FSi7006-A20.pdf&ref=openhardware.directory&product=pycom-pysense&source=md-export)
- **APDS-9007** (sensor): Analog output ambient light sensor for daylight and indoor light measurement. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.broadcom.com%2Fdoc%2FAV02-0512EN&ref=openhardware.directory&product=pycom-pysense&source=md-export)

## Protocols

- **undefined**
- **undefined**
- **undefined**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3507&ref=openhardware.directory&product=pycom-pysense&source=md-export) — 34.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3507&ref=openhardware.directory&product=pycom-pysense&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3507&ref=openhardware.directory&product=pycom-pysense&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.pycom.io%2Fdatasheets%2Fexpansionboards%2Fpysense%2F&ref=openhardware.directory&product=pycom-pysense&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3507%2F3507_specsheet.pdf&ref=openhardware.directory&product=pycom-pysense&source=md-export)
- [pinout](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3507%2F3507_pinout.pdf&ref=openhardware.directory&product=pycom-pysense&source=md-export)

## Tags

`sensors`, `environmental-monitoring`, `iot`, `pycom`, `micropython`, `accelerometer`, `lipo`, `expansion-board`, `humidity`, `pressure`

---
[View full device page](https://openhardware.directory/s/1370/pycom-pysense)

---

# Adafruit Feather M0 RFM69HCW 433 MHz

> ATSAMD21G18 ARM Cortex-M0+ Feather board with RFM69HCW sub-GHz radio at 433 MHz. Up to +20 dBm TX power, AES-128 encryption, 256KB flash, 32KB RAM, native USB, and built-in LiPo charger.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$24.95
- **CPU:** ATSAMD21G18 ARM Cortex-M0+ @ 48 MHz
- **RAM:** 32KB SRAM
- **Flash:** 256KB
- **Power:** 5V + LiPo
- **Dimensions:** 51 × 23 × 8 mm

## Compatible Firmware

- arduino
- circuitpython

## Components

- **ATSAMD21G18** (mcu): ARM Cortex-M0+ at 48MHz, 256KB flash, 32KB SRAM, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fimages%2Fproduct-files%2F2772%2Fatmel-42181-sam-d21_datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw-433&source=md-export)
- **RFM69HCW** (sub-ghz-radio): HopeRF RFM69HCW 433MHz radio module based on SX1231, +13 to +20 dBm TX, AES-128, FSK/OOK modulation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3076%2FRFM69HCW-V1.1.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw-433&source=md-export)

## Protocols

- **SPI**: MOSI=PA16, MISO=PA19, SCK=PA17
- **I2C**: SDA=PA22, SCL=PA23
- **UART**: TX=PA10, RX=PA11
- **RFM69 packet radio**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA11 | RX — UART Receive | — | digital-input, digital-output |
| PA10 | TX — UART Transmit | — | digital-input, digital-output |
| PA15 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA20 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA07 | D9 — GPIO / PWM / Analog | — | digital-input, digital-output, pwm, analog-input |
| PA18 | D10 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA16 | D11 — SPI MOSI | — | digital-input, digital-output |
| PA19 | D12 — SPI MISO | — | digital-input, digital-output |
| PA17 | D13 — SPI SCK / LED | — | digital-input, digital-output |
| PA22 | SDA — I2C Data | — | digital-input, digital-output |
| PA23 | SCL — I2C Clock | — | digital-input, digital-output |
| PA02 | A0 — Analog In / DAC Out | — | analog-input, analog-output |
| PB08 | A1 — Analog In | — | analog-input |
| PB09 | A2 — Analog In | — | analog-input |
| PA04 | A3 — Analog In | — | analog-input |
| PA05 | A4 — Analog In | — | analog-input |
| PB02 | A5 — Analog In | — | analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3177&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw-433&source=md-export) — 24.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3177&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw-433&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-M0-RFM-LoRa-PCB&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw-433&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-m0-radio-with-rfm69-packet-radio%2Foverview&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw-433&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3076%2FRFM69HCW-V1.1.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw-433&source=md-export)

## Tags

`feather`, `rfm69`, `433mhz`, `sub-ghz`, `atsamd21`, `arm-cortex-m0`, `iot`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-m0-rfm69hcw-433)

---

# Adafruit HUZZAH ESP8266 Breakout

> Breadboard-friendly ESP8266 WiFi breakout at 80 MHz with 802.11 b/g/n, 9 GPIO, 3.3V logic, 500mA regulator, and pre-loaded NodeMCU firmware — Adafruit's accessible entry point to ESP8266 development.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$9.95
- **CPU:** ESP8266 Tensilica L106 @ 80 MHz
- **RAM:** 80 KB
- **Flash:** 4MB
- **Power:** 3.3V via external supply or USB-serial 3.3V-6V input
- **Dimensions:** approximately 23 × 18 mm

## Connectivity

WiFi 802.11 b/g/n

## Compatible Firmware

- arduino
- micropython
- Tasmota
- esphome
- platformio

## Components

- **ESP8266** (soc): Espressif ESP8266 Tensilica L106 at 80 MHz with full 802.11 b/g/n WiFi, integrated TCP/IP stack, 80KB RAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2F0a-esp8266ex_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-huzzah-esp8266&source=md-export)

## Protocols

- **UART**: TX=GPIO2, RX=GPIO3
- **SPI**: MOSI=GPIO13, MISO=GPIO12, SCK=GPIO14, SS=GPIO15
- **I2C**: SDA=GPIO4, SCL=GPIO5
- **WiFi 802.11 b/g/n**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | GPIO0 / LED / Boot | — | digital-input, digital-output |
| GPIO2 | GPIO2 / UART TX | — | digital-input, digital-output |
| GPIO4 | SDA | — | digital-input, digital-output |
| GPIO5 | SCL | — | digital-input, digital-output |
| GPIO12 | MISO | — | digital-input, digital-output |
| GPIO13 | MOSI | — | digital-input, digital-output |
| GPIO14 | SCK | — | digital-input, digital-output |
| GPIO15 | SS | — | digital-input, digital-output |
| GPIO16 | GPIO16 / WAKE | — | digital-input, digital-output |
| ADC | ADC / A0 | — | analog-input |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2471&ref=openhardware.directory&product=adafruit-huzzah-esp8266&source=md-export) — 9.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2471&ref=openhardware.directory&product=adafruit-huzzah-esp8266&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-huzzah-esp8266-breakout&ref=openhardware.directory&product=adafruit-huzzah-esp8266&source=md-export)

## Tags

`esp8266`, `wifi`, `iot`, `breakout`, `nodemcu`, `adafruit`, `huzzah`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-huzzah-esp8266)

---

# Adafruit Feather M0 RFM95 LoRa 900 MHz

> ATSAMD21G18 ARM Cortex-M0+ Feather board with RFM95W SX1276 LoRa radio for 868/915 MHz. Achieves 2+ km range, supports LoRaWAN, 256KB flash, 32KB RAM, native USB, and built-in LiPo charger.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$34.95
- **CPU:** ATSAMD21G18 ARM Cortex-M0+ @ 48 MHz
- **RAM:** 32KB SRAM
- **Flash:** 256KB
- **Power:** 5V + LiPo
- **Dimensions:** 51 × 23 × 8 mm

## Compatible Firmware

- arduino
- circuitpython

## Components

- **ATSAMD21G18** (mcu): ARM Cortex-M0+ at 48MHz, 256KB flash, 32KB SRAM, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fimages%2Fproduct-files%2F2772%2Fatmel-42181-sam-d21_datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm95-lora-900&source=md-export)
- **RFM95W (SX1276)** (lora-module): HopeRF RFM95W LoRa module based on Semtech SX1276, 868/915MHz, +5 to +20dBm TX, SF6-SF12, >2km range. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3179%2Fsx1276_77_78_79.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm95-lora-900&source=md-export)

## Protocols

- **SPI**: MOSI=PA16, MISO=PA19, SCK=PA17
- **I2C**: SDA=PA22, SCL=PA23
- **UART**: TX=PA10, RX=PA11
- **LoRa**
- **LoRaWAN**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA11 | RX — UART Receive | — | digital-input, digital-output |
| PA10 | TX — UART Transmit | — | digital-input, digital-output |
| PA15 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA20 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA07 | D9 — GPIO / PWM / Analog | — | digital-input, digital-output, pwm, analog-input |
| PA18 | D10 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA16 | D11 — SPI MOSI | — | digital-input, digital-output |
| PA19 | D12 — SPI MISO | — | digital-input, digital-output |
| PA17 | D13 — SPI SCK / LED | — | digital-input, digital-output |
| PA22 | SDA — I2C Data | — | digital-input, digital-output |
| PA23 | SCL — I2C Clock | — | digital-input, digital-output |
| PA02 | A0 — Analog In / DAC Out | — | analog-input, analog-output |
| PB08 | A1 — Analog In | — | analog-input |
| PB09 | A2 — Analog In | — | analog-input |
| PA04 | A3 — Analog In | — | analog-input |
| PA05 | A4 — Analog In | — | analog-input |
| PB02 | A5 — Analog In | — | analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3178&ref=openhardware.directory&product=adafruit-feather-m0-rfm95-lora-900&source=md-export) — 34.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3178&ref=openhardware.directory&product=adafruit-feather-m0-rfm95-lora-900&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-M0-RFM-LoRa-PCB&ref=openhardware.directory&product=adafruit-feather-m0-rfm95-lora-900&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-m0-radio-with-lora-radio-module%2Foverview&ref=openhardware.directory&product=adafruit-feather-m0-rfm95-lora-900&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3179%2Fsx1276_77_78_79.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm95-lora-900&source=md-export)

## Tags

`feather`, `lora`, `sx1276`, `rfm95`, `868mhz`, `915mhz`, `lorawan`, `atsamd21`, `arm-cortex-m0`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-m0-rfm95-lora-900)

---

# Adafruit Feather M0 RFM96 LoRa 433 MHz

> ATSAMD21G18 ARM Cortex-M0+ Feather board with RFM96W SX1278 LoRa radio for 433 MHz. Achieves 2+ km range, supports LoRaWAN, 256KB flash, 32KB RAM, native USB, and built-in LiPo charger.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$34.95
- **CPU:** ATSAMD21G18 ARM Cortex-M0+ @ 48 MHz
- **RAM:** 32KB SRAM
- **Flash:** 256KB
- **Power:** 5V + LiPo
- **Dimensions:** 51 × 23 × 8 mm

## Compatible Firmware

- arduino
- circuitpython

## Components

- **ATSAMD21G18** (mcu): ARM Cortex-M0+ at 48MHz, 256KB flash, 32KB SRAM, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fimages%2Fproduct-files%2F2772%2Fatmel-42181-sam-d21_datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm96-lora-433&source=md-export)
- **RFM96W (SX1278)** (lora-module): HopeRF RFM96W LoRa module based on Semtech SX1278, 433MHz, +5 to +20dBm TX, SF6-SF12, >2km range. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3179%2Fsx1276_77_78_79.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm96-lora-433&source=md-export)

## Protocols

- **SPI**: MOSI=PA16, MISO=PA19, SCK=PA17
- **I2C**: SDA=PA22, SCL=PA23
- **UART**: TX=PA10, RX=PA11
- **LoRa**
- **LoRaWAN**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA11 | RX — UART Receive | — | digital-input, digital-output |
| PA10 | TX — UART Transmit | — | digital-input, digital-output |
| PA15 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA20 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA07 | D9 — GPIO / PWM / Analog | — | digital-input, digital-output, pwm, analog-input |
| PA18 | D10 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA16 | D11 — SPI MOSI | — | digital-input, digital-output |
| PA19 | D12 — SPI MISO | — | digital-input, digital-output |
| PA17 | D13 — SPI SCK / LED | — | digital-input, digital-output |
| PA22 | SDA — I2C Data | — | digital-input, digital-output |
| PA23 | SCL — I2C Clock | — | digital-input, digital-output |
| PA02 | A0 — Analog In / DAC Out | — | analog-input, analog-output |
| PB08 | A1 — Analog In | — | analog-input |
| PB09 | A2 — Analog In | — | analog-input |
| PA04 | A3 — Analog In | — | analog-input |
| PA05 | A4 — Analog In | — | analog-input |
| PB02 | A5 — Analog In | — | analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3179&ref=openhardware.directory&product=adafruit-feather-m0-rfm96-lora-433&source=md-export) — 34.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3179&ref=openhardware.directory&product=adafruit-feather-m0-rfm96-lora-433&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-M0-RFM-LoRa-PCB&ref=openhardware.directory&product=adafruit-feather-m0-rfm96-lora-433&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-m0-radio-with-lora-radio-module%2Foverview&ref=openhardware.directory&product=adafruit-feather-m0-rfm96-lora-433&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3179%2Fsx1276_77_78_79.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm96-lora-433&source=md-export)

## Tags

`feather`, `lora`, `sx1278`, `rfm96`, `433mhz`, `lorawan`, `atsamd21`, `arm-cortex-m0`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-m0-rfm96-lora-433)

---

# Adafruit Feather M4 CAN Express

> CAN-bus-capable Feather with ATSAME51J19 ARM Cortex-M4F @ 120MHz, built-in CAN transceiver + 5V booster, USB-C, 21 GPIO, 2MB SPI Flash, dual DAC, and LiPo charging. Ideal for automotive and industrial CAN Bus projects.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** microcontroller-board
- **Price:** ~$24.95
- **CPU:** ARM Cortex-M4F @ 120MHz (ATSAME51J19)
- **RAM:** 192KB
- **Flash:** 512KB + 2MB SPI Flash
- **Power:** 5V via USB-C or LiPoly battery
- **Dimensions:** 50.8 x 22.8 x 7mm

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- circuitpython
- arduino

## Components

- **ATSAME51J19** (mcu): Microchip ATSAME51J19 ARM Cortex-M4F @ 120MHz, 512KB Flash, 192KB RAM, native CAN 2.0, USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_E51_Family_Data_Sheet_DS60001525C.pdf&ref=openhardware.directory&product=adafruit-feather-m4-can-express&source=md-export)

## Protocols

- **I2C**: SDA=PA22, SCL=PA23
- **SPI**: MOSI=PA23, MISO=PA22, SCK=PA17
- **UART**: TX=PB22, RX=PB23
- **I2S**
- **CAN**: TX=CANTX, RX=CANRX
- **USB**
- **PWM**
- **ADC**
- **DAC**: DAC0=A0, DAC1=A1

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| A0 | A0 — ADC/DAC0 (PA02) | — | analog-input, dac, digital-input, digital-output |
| A1 | A1 — ADC/DAC1 (PA05) | — | analog-input, dac, digital-input, digital-output |
| A2 | A2 — ADC (PB08) | — | analog-input, digital-input, digital-output |
| A3 | A3 — ADC (PB09) | — | analog-input, digital-input, digital-output |
| A4 | A4 — ADC (PA04) | — | analog-input, digital-input, digital-output |
| A5 | A5 — ADC (PB02) | — | analog-input, digital-input, digital-output |
| D4 | D4 — Digital | — | digital-input, digital-output |
| D5 | D5 — Digital/PWM (PA16) | — | digital-input, digital-output, pwm |
| D6 | D6 — Digital/PWM (PA18) | — | digital-input, digital-output, pwm |
| D9 | D9 — Digital/PWM (PB03) | — | digital-input, digital-output, pwm |
| D10 | D10 — Digital/PWM/CS (PA20) | — | digital-input, digital-output, pwm, spi-cs |
| D11 | D11 — MOSI (PA23) | — | digital-input, digital-output, pwm, spi-mosi |
| D12 | D12 — MISO (PA22) | — | digital-input, digital-output, spi-miso |
| D13 | D13 — SCK/LED (PA17) | — | digital-input, digital-output, spi-sck |
| SDA | SDA — I2C Data (PA12) | — | digital-input, digital-output, i2c-sda |
| SCL | SCL — I2C Clock (PA13) | — | digital-input, digital-output, i2c-scl |
| RX | RX — UART (PB23) | — | digital-input, digital-output, uart-rx |
| TX | TX — UART (PB22) | — | digital-input, digital-output, uart-tx |
| CANTX | CAN TX | — | can-tx |
| CANRX | CAN RX | — | can-rx |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4759&ref=openhardware.directory&product=adafruit-feather-m4-can-express&source=md-export) — 24.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4759&ref=openhardware.directory&product=adafruit-feather-m4-can-express&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4759&ref=openhardware.directory&product=adafruit-feather-m4-can-express&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-m4-can-express&ref=openhardware.directory&product=adafruit-feather-m4-can-express&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_SAME51_CAN&ref=openhardware.directory&product=adafruit-feather-m4-can-express&source=md-export)

## Tags

`feather`, `atsame51`, `can-bus`, `circuitpython`, `adafruit`, `usb-c`, `automotive`, `industrial`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-m4-can-express)

---

# Adafruit Feather nRF52840 Express

> Feather board with nRF52840 ARM Cortex-M4F at 64MHz, BLE 5.0, native USB (CDC/HID/MIDI/MSC), 1MB flash, 256KB SRAM, 2MB QSPI flash, 21 GPIO, SWD debug, and LiPo charging. Supports Arduino and CircuitPython.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$24.95
- **CPU:** Nordic nRF52840 ARM Cortex-M4F
- **RAM:** 256 KB
- **Flash:** 1 MB
- **GPIO:** 21 pins
- **Power:** 5V via Micro USB or 3.7V LiPo via JST connector
- **Dimensions:** 51mm × 23mm × 7.2mm

## Connectivity

Bluetooth BLE 5.0

## Compatible Firmware

- circuitpython
- arduino

## Components

- **nRF52840** (mcu): ARM Cortex-M4F at 64 MHz with 1 MB flash, 256 KB SRAM, Bluetooth 5.0, native USB, up to +8 dBm. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52840_PS_v1.1.pdf&ref=openhardware.directory&product=adafruit-feather-nrf52840-express&source=md-export)
- **GD25Q16C** (flash): 2 MB QSPI NOR flash for CircuitPython code and storage. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.gigadevice.com%2Fdatasheet%2Fgd25q16c%2F&ref=openhardware.directory&product=adafruit-feather-nrf52840-express&source=md-export)

## Protocols

- **I2C**: SDA=GPIO25, SCL=GPIO26
- **SPI**: MOSI=GPIO15, MISO=GPIO14, SCK=GPIO12
- **UART**: TX=GPIO6, RX=GPIO8
- **USB**
- **Bluetooth LE**
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO4 | A0 — DAC/ADC | — | analog-input, dac, digital-input, digital-output, pwm |
| GPIO5 | A1 — ADC | — | analog-input, digital-input, digital-output, pwm |
| GPIO30 | A2 — ADC | — | analog-input, digital-input, digital-output |
| GPIO28 | A3 — ADC | — | analog-input, digital-input, digital-output |
| GPIO2 | A4 — ADC | — | analog-input, digital-input, digital-output, pwm |
| GPIO3 | A5 — ADC | — | analog-input, digital-input, digital-output, pwm |
| GPIO27 | D5 — GPIO/PWM | — | digital-input, digital-output, pwm |
| GPIO11 | D6 — GPIO | — | digital-input, digital-output, pwm |
| GPIO7 | D9 — GPIO/PWM | — | digital-input, digital-output, pwm |
| GPIO26 | D10 — GPIO/PWM | — | digital-input, digital-output, pwm |
| GPIO15 | D11 — MOSI | — | digital-input, digital-output |
| GPIO14 | D12 — MISO | — | digital-input, digital-output |
| GPIO12 | D13 — SCK | — | digital-input, digital-output |
| GPIO25 | SDA — I2C | — | digital-input, digital-output |
| GPIO26 | SCL — I2C | — | digital-input, digital-output |
| GPIO6 | TX — UART | — | digital-input, digital-output |
| GPIO8 | RX — UART | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4062&ref=openhardware.directory&product=adafruit-feather-nrf52840-express&source=md-export) — 24.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4062&ref=openhardware.directory&product=adafruit-feather-nrf52840-express&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4062&ref=openhardware.directory&product=adafruit-feather-nrf52840-express&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fintroducing-the-adafruit-nrf52840-feather&ref=openhardware.directory&product=adafruit-feather-nrf52840-express&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-nRF52840-Express-PCB&ref=openhardware.directory&product=adafruit-feather-nrf52840-express&source=md-export)

## Tags

`ble`, `bluetooth-5`, `nrf52840`, `cortex-m4`, `feather`, `adafruit`, `usb-hid`, `circuitpython`, `arduino`, `swd`

## Certifications

FCC, IC, TELEC

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-nrf52840-express)

---

# Adafruit Feather M0 Express

> ATSAMD21G18 ARM Cortex-M0+ Feather board with 2MB SPI flash for CircuitPython code storage, built-in NeoPixel, 256KB flash, 32KB RAM, native USB, and 100mA LiPo charger. The dedicated CircuitPython Feather.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$19.95
- **CPU:** ATSAMD21G18 ARM Cortex-M0+ @ 48 MHz
- **RAM:** 32KB SRAM
- **Flash:** 256KB + 2MB SPI Flash
- **Power:** 5V + LiPo
- **Dimensions:** 51 × 22.8 × 7.3 mm

## Compatible Firmware

- arduino
- circuitpython

## Components

- **ATSAMD21G18** (mcu): ARM Cortex-M0+ at 48MHz, 256KB flash, 32KB SRAM, native USB supporting serial/HID/MIDI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fimages%2Fproduct-files%2F2772%2Fatmel-42181-sam-d21_datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-m0-express&source=md-export)

## Protocols

- **SPI**: MOSI=PA16, MISO=PA19, SCK=PA17
- **I2C**: SDA=PA22, SCL=PA23
- **UART**: TX=PA10, RX=PA11
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA11 | RX — UART Receive | — | digital-input, digital-output |
| PA10 | TX — UART Transmit | — | digital-input, digital-output |
| PA15 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA20 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA07 | D9 — GPIO / PWM / Analog | — | digital-input, digital-output, pwm, analog-input |
| PA18 | D10 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA16 | D11 — SPI MOSI | — | digital-input, digital-output |
| PA19 | D12 — SPI MISO | — | digital-input, digital-output |
| PA17 | D13 — SPI SCK / LED | — | digital-input, digital-output |
| PA22 | SDA — I2C Data | — | digital-input, digital-output |
| PA23 | SCL — I2C Clock | — | digital-input, digital-output |
| PA02 | A0 — Analog In / DAC Out | — | analog-input, analog-output |
| PB08 | A1 — Analog In | — | analog-input |
| PB09 | A2 — Analog In | — | analog-input |
| PA04 | A3 — Analog In | — | analog-input |
| PA05 | A4 — Analog In | — | analog-input |
| PB02 | A5 — Analog In | — | analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3403&ref=openhardware.directory&product=adafruit-feather-m0-express&source=md-export) — 19.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3403&ref=openhardware.directory&product=adafruit-feather-m0-express&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-M0-Express-PCB&ref=openhardware.directory&product=adafruit-feather-m0-express&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-m0-express-designed-for-circuit-python-circuitpython%2Foverview&ref=openhardware.directory&product=adafruit-feather-m0-express&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fimages%2Fproduct-files%2F2772%2Fatmel-42181-sam-d21_datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-m0-express&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fassets%2Fassets%2F000%2F040%2F553%2Fmedium800%2Farduino_schem.png&ref=openhardware.directory&product=adafruit-feather-m0-express&source=md-export)

## Tags

`feather`, `circuitpython`, `atsamd21`, `arm-cortex-m0`, `neopixel`, `2mb-flash`, `lipo-charger`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-m0-express)

---

# Adafruit Feather nRF52 Bluefruit LE (nRF52832)

> nRF52832 ARM Cortex-M4F Feather board with native Bluetooth 5 LE at 64 MHz, 512KB flash, 64KB RAM, 8 analog inputs, 12 PWM channels, and built-in LiPo charger. FCC/IC/TELEC certified for production BLE products.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$24.95
- **CPU:** Nordic nRF52832 ARM Cortex-M4F @ 64 MHz
- **RAM:** 64KB SRAM
- **Flash:** 512KB
- **Power:** 5V + LiPo
- **Dimensions:** 51 × 22.9 × 7.1 mm

## Connectivity

Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- circuitpython

## Components

- **nRF52832** (mcu): Nordic Semiconductor ARM Cortex-M4F at 64MHz with integrated BLE 5.0 radio, 512KB flash, 64KB SRAM. — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52832_PS_v1.4.pdf&ref=openhardware.directory&product=adafruit-feather-nrf52832&source=md-export)

## Protocols

- **SPI**: MOSI=GPIO12, MISO=GPIO13, SCK=GPIO11
- **I2C**: SDA=GPIO25, SCL=GPIO26
- **UART**: TX=GPIO18, RX=GPIO17
- **BLE 5.0**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO17 | RX — UART Receive | — | digital-input, digital-output |
| GPIO18 | TX — UART Transmit | — | digital-input, digital-output |
| GPIO5 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| GPIO6 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| GPIO8 | D8 — GPIO / PWM | — | digital-input, digital-output, pwm |
| GPIO12 | D11/MOSI — SPI MOSI | — | digital-input, digital-output |
| GPIO13 | D12/MISO — SPI MISO | — | digital-input, digital-output |
| GPIO11 | D13/SCK — SPI SCK | — | digital-input, digital-output |
| GPIO25 | SDA — I2C Data | — | digital-input, digital-output |
| GPIO26 | SCL — I2C Clock | — | digital-input, digital-output |
| GPIO14 | A0 — Analog In | — | analog-input |
| GPIO15 | A1 — Analog In | — | analog-input |
| GPIO16 | A2 — Analog In | — | analog-input |
| GPIO17 | A3 — Analog In (shared with RX) | — | analog-input |
| GPIO18 | A4 — Analog In (shared with TX) | — | analog-input |
| GPIO19 | A5 — Analog In | — | analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3406&ref=openhardware.directory&product=adafruit-feather-nrf52832&source=md-export) — 24.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3406&ref=openhardware.directory&product=adafruit-feather-nrf52832&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_nRF52_Arduino&ref=openhardware.directory&product=adafruit-feather-nrf52832&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fbluefruit-nrf52-feather-learning-guide%2Foverview&ref=openhardware.directory&product=adafruit-feather-nrf52832&source=md-export)
- [datasheet](https://openhardware.directory/r?to=http%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52832_PS_v1.4.pdf&ref=openhardware.directory&product=adafruit-feather-nrf52832&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fassets%2Fassets%2F000%2F052%2F793%2Fmedium800%2Fmicrocontrollers_revgsch.png&ref=openhardware.directory&product=adafruit-feather-nrf52832&source=md-export)

## Tags

`feather`, `nrf52832`, `bluetooth`, `ble`, `arm-cortex-m4`, `nordic`, `certified`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-nrf52832)

---

# Heltec HT-M00S Single Channel LoRa Gateway

> A compact, wall-mountable single-channel LoRaWAN gateway based on the HT-CT62 module (ESP32-C3 + SX1262). Designed for indoor use with a built-in PCB antenna, it can listen to over a dozen LoRa nodes simultaneously and forward data to cloud servers via WiFi. Available in 470MHz, 868MHz, and 915MHz variants.

## Quick Facts

- **Brand:** Heltec Automation
- **Board Type:** lorawan-gateway
- **Price:** ~$18
- **CPU:** RISC-V single-core @ 160MHz, 4-stage pipeline
- **RAM:** 400KB SRAM
- **Flash:** 4MB SiP Flash
- **USB:** USB-C (power only)
- **Power:** 5V
- **Dimensions:** 46 × 46 × 13mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Components

- **ESP32-C3FN4** (mcu): Espressif ESP32-C3FN4 single-core RISC-V MCU at 160MHz with 400KB SRAM, 4MB in-package flash, WiFi 802.11 b/g/n, and Bluetooth LE 5.0. Features hardware AES-128/256 and SHA acceleration, secure boot, and flash encryption. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-ht-m00s&source=md-export)
- **SX1262** (radio): Semtech SX1262 long-range, low-power sub-GHz RF transceiver supporting LoRa and FSK modulation in the 150-960MHz band. Delivers up to +22dBm TX power with -134dBm receive sensitivity at SF12/125kHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F6%2Fb%2F5%2F1%2F4%2FSX1262_datasheet.pdf&ref=openhardware.directory&product=heltec-ht-m00s&source=md-export)
- **HT-CT62** (module): Heltec HT-CT62 integrated module combining ESP32-C3FN4 and SX1262 in a compact 17.78 x 17.78 x 2.8mm stamp-hole package with built-in RF matching circuits. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-CT62%2FHT-CT62%28Rev1.1%29.pdf&ref=openhardware.directory&product=heltec-ht-m00s&source=md-export)

## Protocols

- **SPI** (SPI0): SCK=GPIO10, MOSI=GPIO7, MISO=GPIO6, CS=GPIO8
- **UART**: TX=GPIO21, RX=GPIO20
- **I2C**: SDA=GPIO8, SCL=GPIO9
- **LoRa**: DIO1=GPIO3, BUSY=GPIO4, RESET=GPIO5, CS=GPIO8

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | ADC1_CH0 | — | digital-input, digital-output, adc, pwm, rtc |
| GPIO1 | ADC1_CH1 | — | digital-input, digital-output, adc, pwm, rtc |
| GPIO2 | LED / ADC1_CH2 | — | digital-input, digital-output, adc, pwm, rtc |
| GPIO3 | LoRa DIO1 | — | digital-input, digital-output, adc, pwm, rtc |
| GPIO4 | LoRa BUSY | — | digital-input, digital-output, adc, pwm, rtc |
| GPIO5 | LoRa RESET | — | digital-input, digital-output, pwm, rtc |
| GPIO6 | SPI MISO (LoRa) | — | digital-input, digital-output, pwm |
| GPIO7 | SPI MOSI (LoRa) | — | digital-input, digital-output, pwm |
| GPIO8 | SPI CS / I2C SDA (LoRa) | — | digital-input, digital-output, pwm |
| GPIO9 | USER Button / I2C SCL | — | digital-input, digital-output, pwm |
| GPIO10 | SPI SCK (LoRa) | — | digital-input, digital-output, pwm |
| GPIO18 | USB D- | — | digital-input, digital-output |
| GPIO19 | USB D+ | — | digital-input, digital-output |
| GPIO20 | UART RX | — | digital-input, digital-output, pwm |
| GPIO21 | UART TX | — | digital-input, digital-output, pwm |

## Where to Buy

- [Heltec Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-m00s-single-channel-lora-gateway%2F&ref=openhardware.directory&product=heltec-ht-m00s&source=md-export) — $18.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-m00s-single-channel-lora-gateway%2F&ref=openhardware.directory&product=heltec-ht-m00s&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation&ref=openhardware.directory&product=heltec-ht-m00s&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Florawan-application%2Flora-gateway%2Fht-m00s%2F&ref=openhardware.directory&product=heltec-ht-m00s&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-M00S%2FHT-M00S.pdf&ref=openhardware.directory&product=heltec-ht-m00s&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-CT62%2FHT-CT62_Schematic_Diagram.pdf&ref=openhardware.directory&product=heltec-ht-m00s&source=md-export)

## Tags

`lora`, `lorawan`, `gateway`, `esp32-c3`, `sx1262`, `iot`, `heltec`, `single-channel`, `wifi`

---
[View full device page](https://openhardware.directory/s/1370/heltec-ht-m00s)

---

# Arduino MKR WAN 1310

> LoRa-enabled IoT board with SAMD21 ARM Cortex-M0+ at 48MHz, Murata CMWX1ZZABZ LoRa module, ECC508 crypto chip, 2MB SPI flash, onboard LiPo charger, and 104\u00b5A low-power mode — designed for long-range, battery-powered IoT sensor networks.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$44.5
- **CPU:** ARM Cortex-M0,@ 48MHz (SAMD21)
- **RAM:** 32KB SRAM
- **Flash:** 256KB,2MB SPI Flash
- **USB:** Micro-USB
- **Power:** 5V via Micro-USB or 3.7V LiPo
- **Dimensions:** 61.5 × 25mm

## Compatible Firmware

- arduino

## Components

- **ATSAMD21G18A** (mcu): Microchip SAMD21 ARM Cortex-M0+ at 48MHz with 256KB flash, 32KB SRAM, and native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D21_DA1_Family_DataSheet_DS40001882F.pdf&ref=openhardware.directory&product=arduino-mkr-wan-1310&source=md-export)
- **CMWX1ZZABZ** (sensor): Murata CMWX1ZZABZ-078 LoRa module with STM32L072CZ + SX1276 for LoRaWAN communication at 868/915MHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.murata.com%2Fen-us%2Fproducts%2Fconnectivitymodule%2Flpwa%2Foverview%2Flineup%2Ftype-abz-078&ref=openhardware.directory&product=arduino-mkr-wan-1310&source=md-export)
- **ATECC508A** (sensor): Microchip ATECC508A for hardware TLS/SSL and LoRaWAN OTAA key storage. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F20005927A.pdf&ref=openhardware.directory&product=arduino-mkr-wan-1310&source=md-export)

## Protocols

- **SPI**: MOSI=D8, MISO=D10, SCK=D9
- **I2C**: SDA=D11, SCL=D12
- **UART**: TX=D14, RX=D13

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | Digital I/O | — | digital-input, digital-output, pwm |
| D1 | Digital I/O | — | digital-input, digital-output, pwm |
| D2 | Digital I/O | — | digital-input, digital-output, pwm |
| D3 | Digital I/O | — | digital-input, digital-output, pwm |
| D4 | Digital I/O | — | digital-input, digital-output, pwm |
| D5 | Digital I/O | — | digital-input, digital-output, pwm |
| D6 | Digital I/O | — | digital-input, digital-output |
| D7 | Digital I/O | — | digital-input, digital-output |
| A0 | Analog Input / DAC | — | adc, dac, digital-input, digital-output |
| A1 | Analog Input | — | adc, digital-input, digital-output |
| A2 | Analog Input | — | adc, digital-input, digital-output |
| A3 | Analog Input | — | adc, digital-input, digital-output |
| A4 | Analog Input | — | adc, digital-input, digital-output |
| A5 | Analog Input | — | adc, digital-input, digital-output |
| A6 | Analog Input | — | adc, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Farduino-mkr-wan-1310&ref=openhardware.directory&product=arduino-mkr-wan-1310&source=md-export) — $44.50
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Farduino-mkr-wan-1310&ref=openhardware.directory&product=arduino-mkr-wan-1310&source=md-export) — €49.00
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FMKRWAN1310WANT%2F13993133&ref=openhardware.directory&product=arduino-mkr-wan-1310&source=md-export) — $48.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FMKRWAN1310WANT&ref=openhardware.directory&product=arduino-mkr-wan-1310&source=md-export) — $48.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Farduino-mkr-wan-1310&ref=openhardware.directory&product=arduino-mkr-wan-1310&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fmkr-wan-1310%2F&ref=openhardware.directory&product=arduino-mkr-wan-1310&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FMKRWAN1310WANT-datasheet.pdf&ref=openhardware.directory&product=arduino-mkr-wan-1310&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fschematics%2FMKRWAN1310WANT-schematics.pdf&ref=openhardware.directory&product=arduino-mkr-wan-1310&source=md-export)

## Tags

`arduino`, `mkr`, `lora`, `lorawan`, `iot`, `low-power`, `samd21`, `crypto`

---
[View full device page](https://openhardware.directory/s/1370/arduino-mkr-wan-1310)

---

# Milk-V Duo

> Ultra-compact RISC-V dev board with dual-core CV1800B SoC, 64MB RAM, 0.5 TOPS TPU, running Linux and RTOS simultaneously. Just 21x51mm, starting at $5.

## Quick Facts

- **Brand:** Milk-V
- **Board Type:** SBC
- **Price:** ~$5
- **CPU:** CV1800B
- **RAM:** 64MB
- **Flash:** SD NAND (optional)
- **GPIO:** 26 pins
- **USB:** USB-C
- **Power:** 5V/1A

## Connectivity

Ethernet 100Mbps

## Components

- **CV1800B** (Processor): Dual-core C906 RISC-V processor at 1GHz + 700MHz with integrated TPU, supporting Linux and RTOS simultaneously — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fraw.githubusercontent.com%2Fmilkv-duo%2Fduo-files%2Fmain%2Fduo%2Fdatasheet%2FCV1800B-CV1801B-Preliminary-Datasheet-full-en.pdf&ref=openhardware.directory&product=milk-v-duo&source=md-export)
- **CVITEK TPU** (NPU): Integrated tensor processing unit delivering 0.5 TOPS at INT8 precision for edge AI inference — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fraw.githubusercontent.com%2Fmilkv-duo%2Fduo-files%2Fmain%2Fduo%2Fdatasheet%2FCV1800B-CV1801B-Preliminary-Datasheet-full-en.pdf&ref=openhardware.directory&product=milk-v-duo&source=md-export)

## Protocols

- **MIPI CSI**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fmilkv.io%2Fduo&ref=openhardware.directory&product=milk-v-duo&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fmilkv-duo&ref=openhardware.directory&product=milk-v-duo&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fraw.githubusercontent.com%2Fmilkv-duo%2Fduo-files%2Fmain%2Fduo%2Fdatasheet%2FCV1800B-CV1801B-Preliminary-Datasheet-full-en.pdf&ref=openhardware.directory&product=milk-v-duo&source=md-export)

## Tags

`risc-v`, `sbc`, `linux`, `rtos`, `tpu`, `milkv`, `iot`, `embedded`

---
[View full device page](https://openhardware.directory/s/1370/milk-v-duo)

---

# Milk-V Megrez

> Mini-ITX RISC-V board with quad-core SiFive P550 @ 1.8GHz (ESWIN EIC7700X), up to 32GB LPDDR5, 19.95 TOPS NPU, 8K video codec, PCIe x8 slot, SATA3.

## Quick Facts

- **Brand:** Milk-V
- **Board Type:** Mini-ITX
- **CPU:** ESWIN EIC7700X
- **RAM:** Up to 32GB LPDDR5
- **Flash:** SPI Flash (boot)
- **USB:** 4x USB 3.0
- **Power:** ATX 24-pin,12V DC

## Connectivity

Ethernet Dual Gigabit

## Components

- **ESWIN EIC7700X** (Processor): Four SiFive P550 RISC-V cores (RV64GBCH) at 1.8GHz with 13-stage triple-issue out-of-order pipeline, hypervisor extension, and ECC support — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Feswincomputing%2FEIC7700X-SoC-Technical-Reference-Manual%2Freleases%2Fdownload%2Fv1.0.0-20250103%2FEIC7700X_SoC_Technical_Reference_Manual_Part1.pdf&ref=openhardware.directory&product=milk-v-megrez&source=md-export)
- **ESWIN NPU** (NPU): Integrated NPU delivering 19.95 TOPS at INT8 with INT16/FP16 support, compatible with PyTorch, TensorFlow, PaddlePaddle, and ONNX frameworks — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Feswincomputing%2FEIC7700X-SoC-Technical-Reference-Manual%2Freleases%2Fdownload%2Fv1.0.0-20250103%2FEIC7700X_SoC_Technical_Reference_Manual_Part1.pdf&ref=openhardware.directory&product=milk-v-megrez&source=md-export)
- **IMG AXM-8-256** (GPU): Imagination AXM-8-256 GPU with 0.25 TFLOPS, 1 TOPS, 8 Gpixels, supporting OpenGL ES 3.2, OpenCL 2.1, and Vulkan 1.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.imaginationtech.com%2Fproduct%2Fimg-axm-8-256%2F&ref=openhardware.directory&product=milk-v-megrez&source=md-export)

## Protocols

- **PCIe Gen3**
- **HDMI 2.0**
- **SATA3**
- **NVMe**
- **I2C**
- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fmilkv.io%2Fmegrez&ref=openhardware.directory&product=milk-v-megrez&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fmilkv-megrez&ref=openhardware.directory&product=milk-v-megrez&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Feswincomputing%2FEIC7700X-SoC-Technical-Reference-Manual%2Freleases%2Fdownload%2Fv1.0.0-20250103%2FEIC7700X_SoC_Technical_Reference_Manual_Part1.pdf&ref=openhardware.directory&product=milk-v-megrez&source=md-export)

## Tags

`risc-v`, `mini-itx`, `linux`, `npu`, `ai`, `sifive`, `8k`, `milkv`, `eswin`

---
[View full device page](https://openhardware.directory/s/1370/milk-v-megrez)

---

# DFRobot Gravity Flexible RGB LED Matrix

> Flexible addressable RGB LED matrix panel with I2C control and Gravity connector, available in 8x8, 8x32, and 16x16 configurations for visual displays and lighting projects.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** module
- **Price:** ~$32.99
- **CPU:** N/A (passive LED module)
- **RAM:** N/A
- **Flash:** N/A
- **Power:** 5V DC

## Components

- **Addressable RGB LED** (LED): Individually controllable RGB LED array on flexible PCB for full-color display — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2649.html&ref=openhardware.directory&product=dfrobot-gravity-rgb-led-matrix&source=md-export)

## Protocols

- **I2C**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fdfrobot-gravity-rgb-led-matrix&ref=openhardware.directory&product=dfrobot-gravity-rgb-led-matrix&source=md-export) — $32.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1557.html&ref=openhardware.directory&product=dfrobot-gravity-rgb-led-matrix&source=md-export)

## Tags

`led-matrix`, `rgb`, `i2c`, `gravity`, `dfrobot`, `addressable-led`, `display`

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-gravity-rgb-led-matrix)

---

# Espressif ESP Thread Border Router

> Official Espressif dual-SoC development board combining ESP32-S3 (host) and ESP32-H2 (radio co-processor) to build Thread 1.3 border routers and Zigbee gateways with Matter support over WiFi.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$10.05
- **CPU:** Xtensa LX7 dual-core @ 240MHz (ESP32-S3, host) + RISC-V @ 96MHz (ESP32-H2, radio co-processor)
- **RAM:** 512KB SRAM (S3) + 320KB SRAM (H2)
- **Flash:** 8MB (S3) + 4MB (H2)
- **USB:** USB-C (UART bridge)
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5 | Zigbee Zigbee 3.0

## Components

- **ESP32-S3-WROOM-1** (mcu): Xtensa LX7 dual-core @ 240MHz running OpenThread Border Router stack over WiFi. Provides 8MB flash and 2MB PSRAM for border router application. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=espressif-esp-thread-border-router&source=md-export)
- **ESP32-H2-MINI-1** (mcu): RISC-V @ 96MHz acting as radio co-processor for IEEE 802.15.4. Handles Thread/Zigbee physical and MAC layers, communicating with host over UART/SPI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-h2-mini-1_mini-1u_datasheet_en.pdf&ref=openhardware.directory&product=espressif-esp-thread-border-router&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | GPIO / Boot | — | digital-input, digital-output, strapping |
| GPIO1 | GPIO / ADC | — | digital-input, digital-output, adc |
| GPIO2 | GPIO / ADC | — | digital-input, digital-output, adc |
| GPIO3 | GPIO / ADC | — | digital-input, digital-output, adc |
| GPIO4 | GPIO / ADC | — | digital-input, digital-output, adc |
| GPIO5 | GPIO / ADC | — | digital-input, digital-output, adc |
| GPIO6 | GPIO | — | digital-input, digital-output |
| GPIO7 | GPIO | — | digital-input, digital-output |
| GPIO8 | GPIO / SPI CS (RCP) | — | digital-input, digital-output, strapping |
| GPIO9 | GPIO / Boot | — | digital-input, digital-output, strapping |
| GPIO10 | GPIO / SPI CLK (RCP) | — | digital-input, digital-output |
| GPIO11 | GPIO / SPI MOSI (RCP) | — | digital-input, digital-output |
| GPIO12 | GPIO / SPI MISO (RCP) | — | digital-input, digital-output |
| GPIO13 | GPIO / SPI | — | digital-input, digital-output |
| GPIO14 | GPIO | — | digital-input, digital-output |
| GPIO15 | GPIO | — | digital-input, digital-output |
| GPIO16 | UART0 TX (to RCP) | — | digital-output |
| GPIO17 | UART0 RX (from RCP) | — | digital-input |
| GPIO18 | GPIO / I2C SDA | — | digital-input, digital-output |
| GPIO19 | GPIO / I2C SCL | — | digital-input, digital-output |
| GPIO20 | GPIO / USB D- | — | digital-input, digital-output |
| GPIO21 | GPIO / USB D+ | — | digital-input, digital-output |

## Where to Buy

- [Espressif Store](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fen%2Fcompany%2Fcontact%2Fbuy-a-sample&ref=openhardware.directory&product=espressif-esp-thread-border-router&source=md-export) — 0
- [Espressif](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fen%2Fdev-board%2Fesp-thread-border-routerzigbee-gateway-en&ref=openhardware.directory&product=espressif-esp-thread-border-router&source=md-export) — $10.05

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.espressif.com%2Fprojects%2Fesp-thread-br%2Fen%2Flatest%2Fhardware_platforms.html&ref=openhardware.directory&product=espressif-esp-thread-border-router&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-thread-br&ref=openhardware.directory&product=espressif-esp-thread-border-router&source=md-export)

## Tags

`esp32-s3`, `esp32-h2`, `thread`, `matter`, `zigbee`, `border-router`, `gateway`, `espressif`

---
[View full device page](https://openhardware.directory/s/1370/espressif-esp-thread-border-router)

---

# BigTreeTech SKR Mini E3 V2.0

> Improved 32-bit control board with 4 integrated TMC2209 UART drivers, dual Z ports, and STM32F103RCT6 @ 72MHz. Drop-in upgrade for Ender 3, CR-10S, Ender 5. Marlin and Klipper ready.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$27.99
- **CPU:** STM32F103RCT6
- **RAM:** 48KB
- **Flash:** 256KB
- **USB:** USB Micro-B
- **Power:** 12-24V DC

## Compatible Firmware

- Marlin
- Klipper

## Components

- **STM32F103RCT6** (MCU): STMicroelectronics STM32F103RCT6 32-bit ARM Cortex-M3 microcontroller, 256KB flash, 48KB RAM, running at 72MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32f103rc.pdf&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v2-0&source=md-export)
- **TMC2209 (integrated x4)** (Stepper Driver): 4x TRINAMIC TMC2209 stepper drivers integrated on PCB with UART mode, StealthChop2, SpreadCycle, and stallGuard for sensorless homing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.trinamic.com%2Ffileadmin%2Fassets%2FProducts%2FICs_Documents%2FTMC2209_Datasheet_V103.pdf&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v2-0&source=md-export)
- **MicroSD slot** (Storage): MicroSD card slot for firmware flashing and standalone print file storage — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-mini-e3-v2-0-32-bit-control-board-integrated-tmc2209-uart-for-ender-4&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v2-0&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-mini-e3-v2-0-32-bit-control-board-integrated-tmc2209-uart-for-ender-4&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v2-0&source=md-export) — $27.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBIGTREETECH-SKR-mini-E3&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v2-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-mini-e3-v2-0-32-bit-control-board-integrated-tmc2209-uart-for-ender-4&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v2-0&source=md-export)

## Tags

`3d-printer`, `control-board`, `stm32`, `marlin`, `klipper`, `bigtreetech`, `open-source`, `32-bit`, `tmc2209`, `ender-3`, `mini`, `integrated-drivers`, `dual-z`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-skr-mini-e3-v2-0)

---

# Milk-V Jupiter

> Mini-ITX RISC-V board with octa-core SpacemiT K1, up to 16GB LPDDR4X, 2 TOPS AI, WiFi 6/BT 5.2, dual Gigabit Ethernet, PCIe x8 slot. First RVA22 RISC-V PC board.

## Quick Facts

- **Brand:** Milk-V
- **Board Type:** Mini-ITX
- **CPU:** SpacemiT K1/M1
- **RAM:** Up to 16GB LPDDR4X
- **Flash:** SPI Flash (boot)
- **USB:** 2x USB 3.0,2x USB 2.0,1x USB-C OTG
- **Power:** 12V DC,ATX 24-pin

## Connectivity

WiFi WiFi 6 | Bluetooth 5.2 | Ethernet Dual Gigabit

## Components

- **SpacemiT K1** (Processor): Eight X60 RISC-V cores with RVA22 Profile compliance and 256-bit RVV 1.0 vector extensions, delivering 50 KDMIPS and 2.0 TOPS AI via core fusion — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-resource.spacemit.com%2Ffile%2Fchip%2FK1%2FK1_datasheet_en.pdf&ref=openhardware.directory&product=milk-v-jupiter&source=md-export)
- **IMG BXE-2-32** (GPU): Imagination BXE-2-32 GPU at 819MHz with 32KB SLC, supporting OpenGL ES 3.2, EGL 1.5, OpenCL 3.0, and Vulkan 1.3 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.imaginationtech.com%2Fproduct%2Fimg-bxe-2-32%2F&ref=openhardware.directory&product=milk-v-jupiter&source=md-export)

## Protocols

- **PCIe 2.1**
- **HDMI**
- **NVMe**
- **SATA**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fmilkv.io%2Fjupiter&ref=openhardware.directory&product=milk-v-jupiter&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fmilkv-jupiter&ref=openhardware.directory&product=milk-v-jupiter&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-resource.spacemit.com%2Ffile%2Fchip%2FK1%2FK1_datasheet_en.pdf&ref=openhardware.directory&product=milk-v-jupiter&source=md-export)

## Tags

`risc-v`, `mini-itx`, `linux`, `ai`, `wifi`, `bluetooth`, `pcie`, `milkv`, `spacemit`, `rva22`

---
[View full device page](https://openhardware.directory/s/1370/milk-v-jupiter)

---

# Heltec MeshSolar

> Solar-powered nRF52840 + SX1262 LoRa dev board with integrated BMS supporting 1-4 cell lithium batteries, MPPT solar charging, and USB PD3.0. Designed for Meshtastic solar nodes.

## Quick Facts

- **Brand:** Heltec
- **Board Type:** dev-board
- **Price:** ~$54.95
- **CPU:** nRF52840
- **RAM:** 256KB SRAM
- **Flash:** 1MB
- **Power:** Solar MPPT (18-25V), USB PD3.0, DC (18-25V)
- **Dimensions:** 43 x 97 x 11 mm (BMS), 30 x 20 x 3.2 mm (MCU)

## Connectivity

Bluetooth BLE 5.0, Bluetooth Mesh

## Compatible Firmware

- meshtastic
- arduino
- zephyr

## Components

- **nRF52840** (mcu): Nordic Semiconductor nRF52840 ARM Cortex-M4 MCU with Bluetooth 5 and 1MB flash — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.nordicsemi.com%2Fbundle%2Fps_nrf52840%2Fpage%2Fkeyfeatures_html5.html&ref=openhardware.directory&product=heltec-meshsolar&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver supporting 863-928 MHz with +22 dBm output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=heltec-meshsolar&source=md-export)

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fheltec-meshsolar-dev-board&ref=openhardware.directory&product=heltec-meshsolar&source=md-export) — $54.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fmeshsolar%2F&ref=openhardware.directory&product=heltec-meshsolar&source=md-export)

## Tags

`meshtastic`, `solar`, `lora`, `nrf52840`, `sx1262`, `bms`, `mppt`

---
[View full device page](https://openhardware.directory/s/1370/heltec-meshsolar)

---

# LOLIN D1 Mini V3

> Compact WiFi development board based on the ESP8266-12F module. Features 4 MB flash, 11 digital I/O pins, Micro-USB, and a rich shield ecosystem. One of the most popular boards for IoT projects.

## Quick Facts

- **Brand:** LOLIN/Wemos
- **Board Type:** dev-board
- **Price:** ~$3.5
- **CPU:** ESP8266
- **RAM:** 64 KB
- **Flash:** 4MB
- **GPIO:** 11 pins
- **USB:** Micro-B
- **Power:** 5V

## Connectivity

WiFi WiFi 4 (2.4 GHz)

## Compatible Firmware

- arduino
- micropython
- NodeMCU
- esphome
- tasmota
- ESP Easy

## Components

- **ESP8266-12F** (SoC): ESP8266-based WiFi module with integrated TCP/IP stack, 80/160 MHz Xtensa L106 processor, and PCB antenna. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2F0a-esp8266ex_datasheet_en.pdf&ref=openhardware.directory&product=d1-mini-v3&source=md-export)
- **PCB Antenna** (Antenna): Integrated PCB trace antenna for 2.4 GHz WiFi connectivity, built into the ESP8266-12F module. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2F0a-esp8266ex_datasheet_en.pdf&ref=openhardware.directory&product=d1-mini-v3&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **PWM**
- **ADC**
- **1-Wire**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fd1-mini-v3-nodemcu&ref=openhardware.directory&product=d1-mini-v3&source=md-export) — $3.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wemos.cc%2Fen%2Flatest%2Fd1%2Fd1_mini.html&ref=openhardware.directory&product=d1-mini-v3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwemos%2FD1_mini_Examples&ref=openhardware.directory&product=d1-mini-v3&source=md-export)

## Tags

`esp8266`, `wifi`, `iot`, `arduino`, `micropython`, `esphome`, `tasmota`, `home-automation`

---
[View full device page](https://openhardware.directory/s/1370/d1-mini-v3)

---

# Waveshare LuckFox Nova

> An ultra-compact Linux SBC powered by Rockchip RK3308B with quad-core Cortex-A35 at 1.3GHz, 512MB DDR3, 8GB eMMC, 100M Ethernet, optional Wi-Fi 6 and PoE, and an integrated audio codec with 8-channel mic support.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** sbc
- **Price:** ~$28.99
- **CPU:** Rockchip RK3308B Cortex-A35
- **RAM:** 512MB DDR3
- **Flash:** 8GB eMMC
- **USB:** USB-C + USB-A
- **Power:** USB-C 5V

## Connectivity

WiFi Wi-Fi 6 (optional) | Bluetooth BLE 5.2 (optional) | Ethernet 100M

## Compatible Firmware

- linux
- buildroot

## Protocols

- **I2C**
- **SPI**
- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwaveshare-luckfox-nova-micro-board&ref=openhardware.directory&product=waveshare-luckfox-nova&source=md-export) — $46.85
- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fluckfox-nova.htm&ref=openhardware.directory&product=waveshare-luckfox-nova&source=md-export) — $28.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fluckfox-nova.htm&ref=openhardware.directory&product=waveshare-luckfox-nova&source=md-export)

## Tags

`waveshare`, `luckfox`, `rockchip`, `rk3308`, `linux`, `cortex-a35`, `audio`, `voice-assistant`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-luckfox-nova)

---

# nRF24L01 2.4GHz Wireless Module

> Nordic nRF24L01+ 2.4GHz wireless transceiver module with SPI interface, 2Mbps data rate, 126 channels, and up to 100m range. Popular choice for Arduino and Raspberry Pi wireless sensor networks.

## Quick Facts

- **Brand:** OpenELAB
- **Board Type:** module
- **Price:** ~$5.99
- **CPU:** nRF24L01+ embedded baseband processor (no user-programmable CPU)
- **RAM:** N/A (peripheral module)
- **Flash:** N/A (peripheral module)
- **Power:** 1.9–3.6V

## Components

- **nRF24L01** (radio): Nordic Semiconductor nRF24L01+ 2.4GHz transceiver with Enhanced ShockBurst, 126 RF channels, and up to 2Mbps data rate. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sparkfun.com%2Fdatasheets%2FComponents%2FSMD%2FnRF24L01Pluss_Preliminary_Product_Specification_v1_0.pdf&ref=openhardware.directory&product=nrf24l01-wireless-module&source=md-export)

## Protocols

- **SPI**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fnrf24l01&ref=openhardware.directory&product=nrf24l01-wireless-module&source=md-export) — $5.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fnrf24l01&ref=openhardware.directory&product=nrf24l01-wireless-module&source=md-export)

## Tags

`nrf24l01`, `2.4ghz`, `wireless`, `spi`, `transceiver`, `sensor-network`, `arduino`, `raspberry-pi`

---
[View full device page](https://openhardware.directory/s/1370/nrf24l01-wireless-module)

---

# Wemos D1 Mini (ESP8266)

> Compact ESP8266-based WiFi development board with 4MB flash, 11 digital I/O pins, micro-USB, and a rich shield ecosystem. The most popular board for Tasmota and ESPHome DIY home automation projects.

## Quick Facts

- **Brand:** Wemos
- **Board Type:** dev-board
- **Price:** ~$3.5
- **CPU:** ESP8266EX
- **RAM:** 80KB SRAM
- **Flash:** 4MB
- **GPIO:** 11 digital + 1 analog pins
- **USB:** Micro-USB
- **Power:** Micro-USB 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth none

## Compatible Firmware

- tasmota
- esphome
- arduino
- micropython
- NodeMCU

## Components

- **ESP8266EX** (Microcontroller): Single-core Xtensa LX106 microcontroller with integrated WiFi 802.11 b/g/n, 80/160MHz clock, 80KB SRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2F0a-esp8266ex_datasheet_en.pdf&ref=openhardware.directory&product=wemos-d1-mini-esp8266&source=md-export)
- **CH340G** (USB-Serial): USB to serial UART interface chip for programming and debugging via micro-USB connection — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fdownloads%2FCH340DS1_PDF.html&ref=openhardware.directory&product=wemos-d1-mini-esp8266&source=md-export)

## Protocols

- **WiFi 802.11 b/g/n**
- **I2C**
- **SPI**
- **UART**
- **1-Wire**

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wemos.cc%2Fen%2Flatest%2Fd1%2Fd1_mini.html&ref=openhardware.directory&product=wemos-d1-mini-esp8266&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Ftasmota.github.io%2Fdocs%2FPeripherals%2F&ref=openhardware.directory&product=wemos-d1-mini-esp8266&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwemos%2FD1_mini_Examples&ref=openhardware.directory&product=wemos-d1-mini-esp8266&source=md-export)

## Tags

`esp8266`, `wifi`, `tasmota`, `esphome`, `home-automation`, `iot`, `development-board`, `arduino`, `micropython`, `mqtt`

---
[View full device page](https://openhardware.directory/s/1370/wemos-d1-mini-esp8266)

---

# Sonoff Zigbee Bridge Pro

> ESP32-based Zigbee-to-WiFi gateway with CC2652P coordinator chip supporting 128 Zigbee devices. Flashable with Tasmota for local Zigbee bridge operation with Home Assistant via MQTT.

## Quick Facts

- **Brand:** Sonoff
- **Board Type:** gateway
- **Price:** ~$19.9
- **CPU:** ESP32 + CC2652P
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** USB-C 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2 | Zigbee Zigbee 3.0

## Compatible Firmware

- eWeLink
- tasmota

## Components

- **ESP32** (Microcontroller): Dual-core Xtensa LX6 at 240MHz handling WiFi connectivity, MQTT, and web interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=sonoff-zigbee-bridge-pro&source=md-export)
- **CC2652P** (Wireless): Texas Instruments SimpleLink multi-protocol wireless MCU with +20dBm TX power, supporting Zigbee 3.0, Thread, and IEEE 802.15.4 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fcc2652p.pdf&ref=openhardware.directory&product=sonoff-zigbee-bridge-pro&source=md-export)

## Protocols

- **WiFi 802.11 b/g/n**
- **Zigbee 3.0**
- **Bluetooth 4.2**
- **MQTT**
- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fgateway-and-sensors%2Fsonoff-zigbee-bridge-pro%2F&ref=openhardware.directory&product=sonoff-zigbee-bridge-pro&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Ftemplates.blakadder.com%2Fsonoff_ZBBridge-P.html&ref=openhardware.directory&product=sonoff-zigbee-bridge-pro&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Farendst%2FTasmota&ref=openhardware.directory&product=sonoff-zigbee-bridge-pro&source=md-export)

## Tags

`esp32`, `zigbee`, `wifi`, `tasmota`, `gateway`, `bridge`, `home-automation`, `sonoff`, `cc2652p`, `mqtt`, `smart-home`

---
[View full device page](https://openhardware.directory/s/1370/sonoff-zigbee-bridge-pro)

---

# DFRobot Beetle RP2040

> Compact RP2040 dual-core ARM Cortex-M0+ development board with USB-C, 8 GPIO pins, and beginner-friendly immersion gold pads in a 27x20mm form factor.

## Quick Facts

- **Brand:** DFRobot
- **Price:** ~$6.9
- **CPU:** ARM Cortex-M0+ dual-core @ 133MHz
- **RAM:** 264KB SRAM
- **Flash:** 2MB
- **USB:** USB-C (USB 1.1)
- **Power:** 5V
- **Dimensions:** 27 × 20mm

## Components

- **RP2040** (mcu): Raspberry Pi RP2040 dual-core ARM Cortex-M0+ at 133MHz with 264KB SRAM, programmable I/O (PIO) state machines, and USB 1.1 device/host support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=dfrobot-beetle-rp2040&source=md-export)

## Protocols

- **I2C** (I2C0): SDA=GPIO20, SCL=GPIO21
- **I2C** (I2C1): SDA=GPIO26, SCL=GPIO27
- **UART** (UART0): TX=GPIO0, RX=GPIO1
- **SPI** (SPI0): SCK=GPIO2, MOSI=GPIO3

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Digital I/O / UART0 TX | — | digital-input, digital-output, pwm |
| GPIO1 | Digital I/O / UART0 RX | — | digital-input, digital-output, pwm |
| GPIO26 | Analog Input A0 / I2C1 SDA | — | digital-input, digital-output, adc, pwm |
| GPIO27 | Analog Input A1 / I2C1 SCL | — | digital-input, digital-output, adc, pwm |
| GPIO20 | Digital I/O / I2C0 SDA | — | digital-input, digital-output, pwm |
| GPIO21 | Digital I/O / I2C0 SCL | — | digital-input, digital-output, pwm |
| GPIO2 | Digital I/O / SPI SCK | — | digital-input, digital-output, pwm |
| GPIO3 | Digital I/O / SPI MOSI | — | digital-input, digital-output, pwm |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2615.html&ref=openhardware.directory&product=dfrobot-beetle-rp2040&source=md-export) — $6.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2615.html&ref=openhardware.directory&product=dfrobot-beetle-rp2040&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_DFR0959_Beetle_RP2040&ref=openhardware.directory&product=dfrobot-beetle-rp2040&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=dfrobot-beetle-rp2040&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdfimg.dfrobot.com%2Fnobody%2Fwiki%2Fb7d8bef6465b7cc086af19fab9834fb2.PDF&ref=openhardware.directory&product=dfrobot-beetle-rp2040&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-beetle-rp2040)

---

# Waveshare RP2040-GEEK

> A compact USB-A development board and debugging tool built around the RP2040 dual-core Cortex-M0+ MCU, featuring a 1.14-inch IPS LCD, microSD card slot, and exposed SWD, UART, and I2C connectors for programming ARM microcontrollers.

## Quick Facts

- **Brand:** Waveshare
- **Price:** ~$8.99
- **CPU:** ARM Cortex-M0+ dual-core @ 133MHz
- **RAM:** 264KB SRAM
- **Flash:** 4MB
- **USB:** USB-A
- **Power:** 5V
- **Dimensions:** 61 × 25 × 9mm

## Components

- **RP2040** (mcu): Raspberry Pi RP2040 dual-core ARM Cortex-M0+ processor at 133MHz with 264KB SRAM, 8 PIO state machines, and USB 1.1 support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2040-geek&source=md-export)
- **W25Q32JVSSIQ** (flash-memory): Winbond 4MB (32Mbit) serial NOR flash memory with QSPI interface for firmware and data storage. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.winbond.com%2Fresource-files%2Fw25q32jv%2520spi%2520revc%252008302016.pdf&ref=openhardware.directory&product=waveshare-rp2040-geek&source=md-export)
- **ST7789V** (display-driver): Sitronix ST7789V display controller driving the 240x135 pixel 65K-color IPS LCD panel via SPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fnewhavendisplay.com%2Fcontent%2Fdatasheets%2FST7789V.pdf&ref=openhardware.directory&product=waveshare-rp2040-geek&source=md-export)

## Protocols

- **SPI** (SPI1 (LCD)): DC=GPIO8, CS=GPIO9, SCK=GPIO10, MOSI=GPIO11, RST=GPIO12, BL=GPIO25
- **SPI** (SPI0 (SD Card)): SCK=GPIO18, MOSI=GPIO19, MISO=GPIO20, CS=GPIO21
- **UART** (UART1): TX=GPIO4, RX=GPIO5
- **I2C** (I2C0): SDA=GPIO28, SCL=GPIO29
- **SWD** (SWD Debug): SWCLK=GPIO2, SWDIO=GPIO3

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | SWD SWCLK | — | digital-input, digital-output, pwm |
| GPIO3 | SWD SWDIO | — | digital-input, digital-output, pwm |
| GPIO4 | UART1 TX | — | digital-input, digital-output, pwm |
| GPIO5 | UART1 RX | — | digital-input, digital-output, pwm |
| GPIO8 | LCD DC | — | digital-input, digital-output, pwm |
| GPIO9 | LCD CS | — | digital-input, digital-output, pwm |
| GPIO10 | LCD SCK | — | digital-input, digital-output, pwm |
| GPIO11 | LCD MOSI | — | digital-input, digital-output, pwm |
| GPIO12 | LCD RST | — | digital-input, digital-output, pwm |
| GPIO18 | SD SCK | — | digital-input, digital-output, pwm |
| GPIO19 | SD MOSI | — | digital-input, digital-output, pwm |
| GPIO20 | SD MISO | — | digital-input, digital-output, pwm |
| GPIO21 | SD CS | — | digital-input, digital-output, pwm |
| GPIO25 | LCD Backlight | — | digital-input, digital-output, pwm |
| GPIO28 | I2C0 SDA | — | digital-input, digital-output, pwm, adc |
| GPIO29 | I2C0 SCL | — | digital-input, digital-output, pwm, adc |

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2040-geek.htm&ref=openhardware.directory&product=waveshare-rp2040-geek&source=md-export) — 8.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2040-geek.htm&ref=openhardware.directory&product=waveshare-rp2040-geek&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2FPico_MircoPython_Examples&ref=openhardware.directory&product=waveshare-rp2040-geek&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRP2040-GEEK&ref=openhardware.directory&product=waveshare-rp2040-geek&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2040-geek&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FRP2040-GEEK%2FRP2040-GEEK-Schematic.pdf&ref=openhardware.directory&product=waveshare-rp2040-geek&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-rp2040-geek)

---

# LuckFox Pico Zero

> Feature-rich Linux SBC based on Rockchip RV1106G3 with ARM Cortex-A7, 1.0 TOPS NPU, 256MB DDR3L, 8GB eMMC, WiFi 6, Bluetooth 5.2, 40-pin RPi-compatible GPIO, MIPI CSI 4-lane camera, and onboard microphone/speaker.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** linux-sbc
- **Price:** ~$39.99
- **CPU:** Rockchip RV1106
- **RAM:** 256MB DDR3L
- **Flash:** 8GB eMMC
- **GPIO:** 40 pins
- **USB:** USB-C 2.0
- **Power:** 5V

## Connectivity

WiFi 2.4GHz WiFi 6 | Bluetooth BLE 5.2

## Compatible Firmware

- buildroot

## Components

- **RV1106** (soc): ARM Cortex-A7 @ 1.2GHz + RISC-V MCU + 1.0 TOPS NPU + ISP 3.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.luckfox.com%2Fwiki%2FLuckfox-Pico%2FPDF%2FRockchip%2520RV1106%2520Datasheet%2520V1.7-20231218.pdf&ref=openhardware.directory&product=luckfox-pico-zero&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **PWM**
- **ADC**
- **MIPI CSI**
- **USB 2.0**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fraspberry-pi%2Fboards-kits%2Fraspberry-pi-pico-cat%2Fluckfox-pico-zero.htm&ref=openhardware.directory&product=luckfox-pico-zero&source=md-export) — $39.99

## Available Software

- [LuckFox Pico SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-pico-zero&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fraspberry-pi%2Fboards-kits%2Fraspberry-pi-pico-cat%2Fluckfox-pico-zero.htm&ref=openhardware.directory&product=luckfox-pico-zero&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-pico-zero&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Pico-Zero&ref=openhardware.directory&product=luckfox-pico-zero&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.luckfox.com%2Fwiki%2FLuckfox-Pico%2FPDF%2FRockchip%2520RV1106%2520Datasheet%2520V1.7-20231218.pdf&ref=openhardware.directory&product=luckfox-pico-zero&source=md-export)

## Tags

`linux`, `sbc`, `rockchip`, `rv1106`, `arm`, `npu`, `wifi6`, `bluetooth`, `ai-camera`, `mipi-csi`, `raspberry-pi-hat`, `emmc`, `audio`

---
[View full device page](https://openhardware.directory/s/1370/luckfox-pico-zero)

---

# LuckFox Core3506

> Tiny 32x32mm Rockchip RK3506B core module with tri-core ARM Cortex-A7 + Cortex-M0, 512MB DDR3L, optional 8GB eMMC, dual 100M Ethernet RMII, MIPI DSI 2-lane, 4-ch ADC, CAN bus, and 120-pin castellated holes. Supports Linux, RTOS, and bare-metal via AMP.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** module
- **Price:** ~$8.99
- **CPU:** ARM Cortex-A7 3x @ 1.2GHz + Cortex-M0 co-processor, VFP
- **RAM:** 512MB DDR3L
- **Flash:** 8GB eMMC (optional)
- **Power:** 3.3V via carrier board
- **Dimensions:** 32 × 32mm

## Connectivity

Ethernet 2x 10/100 Mbps RMII

## Components

- **RK3506** (soc): Rockchip RK3506B 22nm SoC with 3x Cortex-A7 @ 1.2GHz + Cortex-M0, dual 100M Ethernet RMII, MIPI DSI, 2D graphics, AMP multi-system support. — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fopensource.rock-chips.com%2Fimages%2F5%2F51%2FRockchip_RK3506G2_Datasheet_V1.3-20250811.pdf&ref=openhardware.directory&product=waveshare-luckfox-core3506&source=md-export)

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fcore3506.htm&ref=openhardware.directory&product=waveshare-luckfox-core3506&source=md-export) — 8.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fcore3506.htm&ref=openhardware.directory&product=waveshare-luckfox-core3506&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FCore3506%2F&ref=openhardware.directory&product=waveshare-luckfox-core3506&source=md-export)
- [datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fopensource.rock-chips.com%2Fimages%2F5%2F51%2FRockchip_RK3506G2_Datasheet_V1.3-20250811.pdf&ref=openhardware.directory&product=waveshare-luckfox-core3506&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-luckfox-core3506)

---

# Olimex ESP32-H2-DevKit-LiPo

> Ultra-affordable open-source ESP32-H2 dev board for Thread, Zigbee, and Matter — BLE 5, LiPo charging, Qwiic/Stemma, dual USB-C, for €5.95.

## Quick Facts

- **Brand:** Olimex
- **Board Type:** dev-board
- **Price:** ~$6.5
- **CPU:** RISC-V single-core @ 96MHz
- **RAM:** 320KB SRAM
- **Flash:** 4MB
- **USB:** 2× USB-C (serial + native JTAG)
- **Power:** USB-C or LiPo battery
- **Dimensions:** 48 × 25mm

## Connectivity

Bluetooth BLE 5.0 | Zigbee Zigbee 3.0

## Compatible Firmware

- arduino
- esp-idf
- esphome
- platformio

## Components

- **ESP32-H2** (mcu): Espressif ESP32-H2 SoC with RISC-V @ 96MHz, 4MB flash, 320KB RAM, BLE 5, and IEEE 802.15.4 for Thread/Zigbee/Matter. No WiFi. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-h2_datasheet_en.pdf&ref=openhardware.directory&product=olimex-esp32-h2-devkit-lipo&source=md-export)
- **battery-charger-h2** (battery-charger): Onboard LiPo battery charger with JST connector and battery measurement circuitry. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FOLIMEX%2FESP32-H2-DevKit-Lipo&ref=openhardware.directory&product=olimex-esp32-h2-devkit-lipo&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **UEXT**
- **Qwiic**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | GPIO 0 / ADC | — | digital-input, digital-output, adc |
| GPIO1 | GPIO 1 / ADC | — | digital-input, digital-output, adc |
| GPIO2 | GPIO 2 / ADC | — | digital-input, digital-output, adc |
| GPIO3 | GPIO 3 / ADC | — | digital-input, digital-output, adc |
| GPIO4 | GPIO 4 / SDA | — | digital-input, digital-output |
| GPIO5 | GPIO 5 / SCL | — | digital-input, digital-output |
| GPIO6 | GPIO 6 / UART TX | — | digital-input, digital-output |
| GPIO7 | GPIO 7 / UART RX | — | digital-input, digital-output |
| GPIO8 | GPIO 8 / SPI CLK | — | digital-input, digital-output |
| GPIO9 | GPIO 9 / BOOT | — | digital-input, digital-output, strapping |
| GPIO10 | GPIO 10 / SPI MOSI | — | digital-input, digital-output |
| GPIO11 | GPIO 11 / SPI MISO | — | digital-input, digital-output |
| GPIO12 | GPIO 12 / SPI CS | — | digital-input, digital-output |
| GPIO13 | GPIO 13 | — | digital-input, digital-output |
| GPIO14 | GPIO 14 | — | digital-input, digital-output |
| GPIO22 | GPIO 22 | — | digital-input, digital-output |
| GPIO23 | GPIO 23 | — | digital-input, digital-output |
| GPIO24 | GPIO 24 | — | digital-input, digital-output |
| GPIO25 | GPIO 25 | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Olimex](https://openhardware.directory/r?to=https%3A%2F%2Fwww.olimex.com%2FProducts%2FIoT%2FESP32-H2%2FESP32-H2-DevKit-LiPo%2F&ref=openhardware.directory&product=olimex-esp32-h2-devkit-lipo&source=md-export) — 5.95
- [The Pi Hut](https://openhardware.directory/r?to=https%3A%2F%2Fthepihut.com%2Fproducts%2Folimex-esp32-h2-devkit-lipo&ref=openhardware.directory&product=olimex-esp32-h2-devkit-lipo&source=md-export) — 8.50

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.olimex.com%2FProducts%2FIoT%2FESP32-H2%2FESP32-H2-DevKit-LiPo%2Fopen-source-hardware&ref=openhardware.directory&product=olimex-esp32-h2-devkit-lipo&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FOLIMEX%2FESP32-H2-DevKit-Lipo&ref=openhardware.directory&product=olimex-esp32-h2-devkit-lipo&source=md-export)

## Tags

`esp32-h2`, `thread`, `zigbee`, `matter`, `ble`, `open-hardware`, `cern-ohl`, `lipo`, `breadboard`, `802.15.4`

---
[View full device page](https://openhardware.directory/s/1370/olimex-esp32-h2-devkit-lipo)

---

# Adafruit ESP32-C6 Feather

> Open-source Feather-form-factor ESP32-C6 board with WiFi 6, BLE 5, Thread, Zigbee, STEMMA QT, NeoPixel, LiPo charging with MAX17048, and CircuitPython support — $14.95.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$14.95
- **CPU:** RISC-V single-core @ 160MHz
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C (serial via CH340)
- **Power:** USB-C or LiPoly JST

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.0 | Zigbee Zigbee 3.0

## Compatible Firmware

- arduino
- circuitpython
- micropython
- esphome
- esp-idf

## Components

- **ESP32-C6** (mcu): Espressif ESP32-C6 @ 160MHz, 4MB flash, WiFi 6, BLE 5, Zigbee, Thread 1.3, and Matter support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-esp32-c6-feather&source=md-export)
- **MAX17048** (battery-gauge): Maxim MAX17048 I2C fuel gauge for accurate LiPo battery state-of-charge measurement. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX17048-MAX17049.pdf&ref=openhardware.directory&product=adafruit-esp32-c6-feather&source=md-export)
- **adafruit-lipo-charger** (battery-charger): Onboard USB-C LiPo charger via JST 2-PH connector with peripheral power control pin. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-esp32-c6-feather&ref=openhardware.directory&product=adafruit-esp32-c6-feather&source=md-export)

## Protocols

- **I2C**: SDA=IO19, SCL=IO18
- **SPI**: SCK=IO21, MOSI=IO22, MISO=IO23
- **UART**: TX=IO16, RX=IO17

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| A0/IO0 | ADC / GPIO | — | digital-input, digital-output, adc, pwm |
| A1/IO1 | ADC / GPIO | — | digital-input, digital-output, adc, pwm |
| A2/IO6 | ADC / GPIO (shared) | — | digital-input, digital-output, adc |
| A3/IO5 | ADC / GPIO (shared) | — | digital-input, digital-output, adc |
| A4/IO2 | ADC / GPIO | — | digital-input, digital-output, adc |
| A5/IO3 | ADC / GPIO | — | digital-input, digital-output, adc |
| IO4 | GPIO | — | digital-input, digital-output, pwm |
| IO7 | GPIO | — | digital-input, digital-output, pwm |
| IO8 | GPIO | — | digital-input, digital-output, pwm |
| IO9 | NeoPixel / BOOT | — | digital-output, strapping |
| IO15 | Red LED | — | digital-output |
| IO16 | UART TX | — | digital-input, digital-output |
| IO17 | UART RX | — | digital-input, digital-output |
| IO18 | I2C SCL / STEMMA QT | — | digital-input, digital-output |
| IO19 | I2C SDA / STEMMA QT | — | digital-input, digital-output |
| IO20 | Peripheral Power Control | — | digital-output |
| IO21 | SPI SCK | — | digital-input, digital-output |
| IO22 | SPI MOSI | — | digital-output |
| IO23 | SPI MISO | — | digital-input |
| EN | Reset / Enable | — | — |
| 3V3 | 3.3V Power | — | — |
| VBAT | Battery Voltage | — | adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5933&ref=openhardware.directory&product=adafruit-esp32-c6-feather&source=md-export) — 14.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5933&ref=openhardware.directory&product=adafruit-esp32-c6-feather&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-ESP32-C6-Feather-PCB&ref=openhardware.directory&product=adafruit-esp32-c6-feather&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-esp32-c6-feather&ref=openhardware.directory&product=adafruit-esp32-c6-feather&source=md-export)

## Tags

`esp32-c6`, `feather`, `wifi6`, `thread`, `zigbee`, `matter`, `ble`, `stemma-qt`, `circuitpython`, `open-hardware`, `adafruit`, `neopixel`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-esp32-c6-feather)

---

# Radxa Rock 4D

> Mid-range Rockchip RK3576 SBC from Radxa with up to 8GB LPDDR4X, NVMe M.2, WiFi 6, Gigabit Ethernet, and USB 3.0 — a capable Linux board in a compact footprint.

## Quick Facts

- **Brand:** Radxa
- **Board Type:** linux-sbc
- **Price:** ~$30
- **CPU:** Rockchip RK3576
- **RAM:** 4GB / 8GB LPDDR4X
- **Flash:** eMMC socket (optional)
- **Power:** 5V

## Connectivity

WiFi WiFi 6 (802.11ax) | Bluetooth BLE 5.0 | Ethernet Gigabit (1 GbE)

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arace Tech](https://openhardware.directory/r?to=https%3A%2F%2Farace.tech%2Fproducts%2Fradxa-rock-4d&ref=openhardware.directory&product=radxa-rock-4d&source=md-export) — $30.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Frock4%2F4d&ref=openhardware.directory&product=radxa-rock-4d&source=md-export)
- [armbian](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fradxa-rock-4d%2F&ref=openhardware.directory&product=radxa-rock-4d&source=md-export)

## Tags

`radxa`, `rock4d`, `rk3576`, `sbc`, `linux`, `armbian`, `nvme`, `wifi6`

---
[View full device page](https://openhardware.directory/s/1370/radxa-rock-4d)

---

# Radxa Rockpi E

> Compact Rockchip RK3328 SBC with up to 4GB DDR4, eMMC, microSD, Gigabit + Fast Ethernet, USB 3.0, optional WiFi/BT, and USB-C power — a versatile small Linux board for networking and IoT.

## Quick Facts

- **Brand:** Radxa
- **Board Type:** linux-sbc
- **Price:** ~$29.9
- **CPU:** Rockchip RK3328
- **RAM:** 1GB / 2GB / 4GB DDR4
- **Flash:** eMMC module socket
- **Power:** 5V

## Connectivity

WiFi WiFi 4 (optional) | Bluetooth 4.2 (optional) | Ethernet Gigabit (1 GbE) + 100 Mbps

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arace Tech](https://openhardware.directory/r?to=https%3A%2F%2Farace.tech%2Fproducts%2Fradxa-rock-pi-e&ref=openhardware.directory&product=radxa-rockpi-e&source=md-export) — $29.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Frockpi%2Fpie&ref=openhardware.directory&product=radxa-rockpi-e&source=md-export)
- [armbian](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Frockpie%2F&ref=openhardware.directory&product=radxa-rockpi-e&source=md-export)

## Tags

`radxa`, `rockpi-e`, `rk3328`, `sbc`, `linux`, `armbian`, `dual-ethernet`, `router`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/radxa-rockpi-e)

---

# Adafruit Feather RP2040 with USB Type A Host

> RP2040 Feather with a dedicated USB Type-A host port powered by a 5V boost converter, enabling connection to USB devices like keyboards, mice, and MIDI controllers alongside standard USB-C programming.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** feather
- **Price:** ~$17.5
- **CPU:** RP2040
- **RAM:** 264 KB
- **Flash:** 8 MB
- **Power:** 5V + LiPo
- **Dimensions:** 50.8 x 22.8 x 7 mm

## Compatible Firmware

- circuitpython
- micropython
- arduino

## Components

- **RP2040** (mcu): Dual-core ARM Cortex-M0+ at 133 MHz, 264KB SRAM, PIO-based USB host. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-rp2040-usb-host&source=md-export)
- **TPS61023** (power): TI TPS61023 boost converter providing 5V up to 1A for USB-A host port. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftps61023.pdf&ref=openhardware.directory&product=adafruit-feather-rp2040-usb-host&source=md-export)

## Protocols

- **I2C**: SDA=GPIO24, SCL=GPIO25
- **SPI**: MOSI=GPIO11, MISO=GPIO12, SCK=GPIO13
- **UART**: TX=GPIO0, RX=GPIO1
- **USB Host (PIO)**: D+=GPIO16, D-=GPIO17

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | TX | — | uart-tx, digital |
| GPIO1 | RX | — | uart-rx, digital |
| GPIO2 | D2 | — | digital, pwm |
| GPIO3 | D3 | — | digital, pwm |
| GPIO4 | D4 | — | digital, pwm |
| GPIO5 | D5 | — | digital, pwm |
| GPIO6 | D6 | — | digital, pwm |
| GPIO7 | D7 | — | digital |
| GPIO8 | D8 | — | digital |
| GPIO9 | D9 | — | digital |
| GPIO11 | MOSI | — | spi-mosi, digital |
| GPIO12 | MISO | — | spi-miso, digital |
| GPIO13 | SCK | — | spi-sck, digital |
| GPIO16 | USB Host D+ | — | usb-host, digital |
| GPIO17 | USB Host D- | — | usb-host, digital |
| GPIO18 | Boost Enable | — | digital |
| GPIO24 | SDA | — | i2c-sda, digital |
| GPIO25 | SCL | — | i2c-scl, digital |
| GPIO26 | A0 | — | analog, digital |
| GPIO27 | A1 | — | analog, digital |
| GPIO28 | A2 | — | analog, digital |
| GPIO29 | A3 | — | analog, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5723&ref=openhardware.directory&product=adafruit-feather-rp2040-usb-host&source=md-export) — 17.5

## Available Software

- [Pico-PIO-USB](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsekigon-gonnoc%2FPico-PIO-USB&ref=openhardware.directory&product=adafruit-feather-rp2040-usb-host&source=md-export)
- [TinyUSB Dual-Role](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_TinyUSB_Arduino&ref=openhardware.directory&product=adafruit-feather-rp2040-usb-host&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5723&ref=openhardware.directory&product=adafruit-feather-rp2040-usb-host&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-rp2040-with-usb-type-a-host&ref=openhardware.directory&product=adafruit-feather-rp2040-usb-host&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsekigon-gonnoc%2FPico-PIO-USB&ref=openhardware.directory&product=adafruit-feather-rp2040-usb-host&source=md-export)

## Tags

`adafruit`, `feather`, `rp2040`, `usb-host`, `usb-a`, `tinysub`, `circuitpython`, `midi`, `hid`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-rp2040-usb-host)

---

# ProS3[D] ESP32-S3 by Unexpected Maker

> The ProS3[D] is Unexpected Maker's flagship ESP32-S3 development board featuring a dual antenna system (onboard 3D high-gain + u.FL for external), an I2C battery fuel gauge, 16MB flash, 8MB PSRAM, dual 700mA LDOs, and STEMMA QT — with software-switchable RF routing.

## Quick Facts

- **Brand:** Unexpected Maker
- **Board Type:** ESP32-S3
- **Price:** ~$26.5
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM + 8MB PSRAM
- **Flash:** 16MB
- **USB:** USB-C (native USB + USB Serial JTAG)
- **Power:** USB-C 5V or LiPo battery

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth Bluetooth 5 LE + Mesh

## Compatible Firmware

- circuitpython
- micropython
- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Dual-core Xtensa LX7 at 240MHz with AI vector extensions, WiFi 802.11 b/g/n, Bluetooth 5 LE+Mesh, and native USB OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=pros3d-esp32-s3&source=md-export)
- **8MB PSRAM** (memory): External 8MB QSPI pseudo-static RAM providing expanded working memory for large datasets and ML inference. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=pros3d-esp32-s3&source=md-export)
- **I2C Battery Fuel Gauge** (sensor): Dedicated I2C fuel gauge IC for accurate LiPo battery state-of-charge monitoring. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fesp32s3.com%2Fpros3.html&ref=openhardware.directory&product=pros3d-esp32-s3&source=md-export)
- **RF Switch** (chip): Software-controlled RF switch allowing runtime selection between the onboard 3D high-gain antenna and the u.FL external antenna connector. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fesp32s3.com%2Fpros3.html&ref=openhardware.directory&product=pros3d-esp32-s3&source=md-export)
- **RGB LED** (led): Built-in addressable RGB LED for status indication and user feedback. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=pros3d-esp32-s3&source=md-export)

## Protocols

- **I2C**: SDA=GPIO21, SCL=GPIO38
- **SPI**: MOSI=GPIO35, MISO=GPIO36, SCK=GPIO37
- **UART**: TX=GPIO33, RX=GPIO34
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | ADC1_CH0 | — | analog, digital |
| GPIO2 | ADC1_CH1 | — | analog, digital |
| GPIO3 | ADC1_CH2 | — | analog, digital |
| GPIO4 | ADC1_CH3 | — | analog, digital |
| GPIO5 | ADC1_CH4 | — | analog, digital |
| GPIO6 | ADC1_CH5 | — | analog, digital |
| GPIO7 | ADC1_CH6 | — | analog, digital |
| GPIO8 | GPIO8 | — | digital |
| GPIO9 | GPIO9 | — | digital |
| GPIO10 | GPIO10 | — | digital |
| GPIO11 | GPIO11 | — | digital |
| GPIO12 | GPIO12 | — | digital |
| GPIO13 | GPIO13 | — | digital |
| GPIO14 | GPIO14 | — | digital |
| GPIO15 | GPIO15 | — | digital |
| GPIO16 | GPIO16 | — | digital |
| GPIO17 | GPIO17 | — | digital |
| GPIO18 | GPIO18 | — | digital |
| GPIO21 | SDA | — | i2c-sda, digital |
| GPIO26 | GPIO26 | — | digital |
| GPIO33 | TX | — | uart-tx, digital |
| GPIO34 | RX | — | uart-rx, digital |
| GPIO35 | MOSI | — | spi-mosi, digital |
| GPIO36 | MISO | — | spi-miso, digital |
| GPIO37 | SCK | — | spi-sck, digital |
| GPIO38 | SCL | — | i2c-scl, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6398&ref=openhardware.directory&product=pros3d-esp32-s3&source=md-export) — $26.50

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Funexpectedmaker_pros3%2F&ref=openhardware.directory&product=pros3d-esp32-s3&source=md-export)
- [Getting Started Guide](https://openhardware.directory/r?to=https%3A%2F%2Fesp32s3.com%2Fpros3.html&ref=openhardware.directory&product=pros3d-esp32-s3&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6398&ref=openhardware.directory&product=pros3d-esp32-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Funexpectedmaker%2Fesp32s3&ref=openhardware.directory&product=pros3d-esp32-s3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fesp32s3.com%2Fpros3.html&ref=openhardware.directory&product=pros3d-esp32-s3&source=md-export)

## Tags

`unexpected-maker`, `esp32-s3`, `pros3`, `dual-antenna`, `psram`, `circuitpython`, `wifi`, `ble`, `iot`, `ufl`

## Certifications

CE, FCC, RoHS

---
[View full device page](https://openhardware.directory/s/1370/pros3d-esp32-s3)

---

# Adafruit Metro RP2040

> Arduino-Uno-compatible development board powered by the RP2040 with 16MB QSPI flash, microSD slot, STEMMA QT, onboard NeoPixel, USB-C, and an RX/TX switch for serial flexibility.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$14.95
- **CPU:** RP2040
- **RAM:** 264 KB
- **Flash:** 16MB
- **Power:** 5V via USB-C or 6-12V DC barrel jack

## Compatible Firmware

- circuitpython
- micropython
- arduino
- C/C++

## Components

- **RP2040** (mcu): Dual-core ARM Cortex-M0+ at 133 MHz, 264KB SRAM, 8 PIO state machines. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=adafruit-metro-rp2040&source=md-export)
- **NeoPixel RGB LED** (led): Onboard addressable RGB NeoPixel for status indication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=adafruit-metro-rp2040&source=md-export)

## Protocols

- **I2C**: SDA=GPIO22, SCL=GPIO23
- **SPI**: MOSI=GPIO19, MISO=GPIO20, SCK=GPIO18
- **UART**: TX=GPIO1, RX=GPIO0
- **SWD**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | D0 / RX | — | uart-rx, digital |
| GPIO1 | D1 / TX | — | uart-tx, digital |
| GPIO2 | D2 | — | digital, pwm |
| GPIO3 | D3 | — | digital, pwm |
| GPIO4 | D4 | — | digital, pwm |
| GPIO5 | D5 | — | digital, pwm |
| GPIO6 | D6 | — | digital, pwm |
| GPIO7 | D7 | — | digital, pwm |
| GPIO8 | D8 | — | digital, pwm |
| GPIO9 | D9 | — | digital, pwm |
| GPIO10 | D10 | — | digital, pwm |
| GPIO11 | D11 | — | digital, pwm |
| GPIO12 | D12 | — | digital, pwm |
| GPIO13 | D13 | — | digital, pwm |
| GPIO18 | SCK | — | spi-sck, digital |
| GPIO19 | MOSI | — | spi-mosi, digital |
| GPIO20 | MISO | — | spi-miso, digital |
| GPIO22 | SDA | — | i2c-sda, digital |
| GPIO23 | SCL | — | i2c-scl, digital |
| GPIO26 | A0 | — | analog, digital |
| GPIO27 | A1 | — | analog, digital |
| GPIO28 | A2 | — | analog, digital |
| GPIO29 | A3 | — | analog, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5786&ref=openhardware.directory&product=adafruit-metro-rp2040&source=md-export) — 14.95

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fdownloads&ref=openhardware.directory&product=adafruit-metro-rp2040&source=md-export)
- [Pico SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fraspberrypi%2Fpico-sdk&ref=openhardware.directory&product=adafruit-metro-rp2040&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5786&ref=openhardware.directory&product=adafruit-metro-rp2040&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-metro-rp2040&ref=openhardware.directory&product=adafruit-metro-rp2040&source=md-export)

## Tags

`adafruit`, `metro`, `rp2040`, `arduino-compatible`, `circuitpython`, `microsd`, `pio`, `stemma`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-metro-rp2040)

---

# Adafruit Feather M4 Express

> High-performance Feather with ATSAMD51J19 Cortex M4F at 120MHz, 192KB RAM, 512KB flash, 2MB SPI flash, dual 12-bit DAC/ADC, AES-256 hardware crypto, LiPo charging, 21 GPIO, and native USB HID. Feather ecosystem compatible.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$22.95
- **CPU:** Microchip ATSAMD51J19 ARM Cortex M4F
- **RAM:** 192 KB
- **Flash:** 512 KB
- **GPIO:** 21 pins
- **Power:** 5V via Micro USB or 3.7V LiPo via JST connector
- **Dimensions:** 50.8mm × 22.8mm × 7mm

## Compatible Firmware

- circuitpython
- arduino

## Components

- **ATSAMD51J19** (mcu): 32-bit ARM Cortex M4F at 120 MHz with 512 KB flash, 192 KB SRAM, AES-256, TRNG, native USB, I2S. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D5xE5x_Family_Data_Sheet_DS60001507G.pdf&ref=openhardware.directory&product=adafruit-feather-m4-express&source=md-export)
- **GD25Q16C** (flash): 2 MB SPI NOR flash for CircuitPython and data storage. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.gigadevice.com%2Fdatasheet%2Fgd25q16c%2F&ref=openhardware.directory&product=adafruit-feather-m4-express&source=md-export)

## Protocols

- **I2C**: SDA=SDA, SCL=SCL
- **SPI**: MOSI=D11, MISO=D12, SCK=D13
- **UART**: TX=D1, RX=D0
- **USB**
- **I2S**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX | — | digital-input, digital-output |
| D1 | TX | — | digital-input, digital-output |
| D4 | GPIO | — | digital-input, digital-output |
| D5 | GPIO | — | digital-input, digital-output, pwm |
| D6 | GPIO | — | digital-input, digital-output, pwm |
| D9 | GPIO | — | digital-input, digital-output, pwm |
| D10 | GPIO | — | digital-input, digital-output, pwm |
| D11 | MOSI | — | digital-input, digital-output, pwm |
| D12 | MISO | — | digital-input, digital-output |
| D13 | SCK | — | digital-input, digital-output |
| SDA | SDA | — | digital-input, digital-output |
| SCL | SCL | — | digital-input, digital-output |
| A0 | ADC/DAC | — | digital-input, digital-output, analog-input, dac |
| A1 | ADC/DAC | — | digital-input, digital-output, analog-input, dac |
| A2 | ADC | — | digital-input, digital-output, analog-input |
| A3 | ADC | — | digital-input, digital-output, analog-input |
| A4 | ADC | — | digital-input, digital-output, analog-input |
| A5 | ADC | — | digital-input, digital-output, analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3857&ref=openhardware.directory&product=adafruit-feather-m4-express&source=md-export) — 22.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3857&ref=openhardware.directory&product=adafruit-feather-m4-express&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3857&ref=openhardware.directory&product=adafruit-feather-m4-express&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-m4-express-atsamd51&ref=openhardware.directory&product=adafruit-feather-m4-express&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-M4-Express-PCB&ref=openhardware.directory&product=adafruit-feather-m4-express&source=md-export)

## Tags

`circuitpython`, `arduino`, `atsamd51`, `cortex-m4`, `adafruit`, `feather`, `express`, `high-performance`, `lipo`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-m4-express)

---

# Heltec Mesh Node T114

> Compact nRF52840 + SX1262 LoRa development board with BLE 5.0, optional 1.14" TFT display and L76K GPS module. Designed for Meshtastic mesh networking, LoRaWAN, and battery-powered IoT deployments with ultra-low 11uA deep sleep current and solar panel support.

## Quick Facts

- **Brand:** Heltec Automation
- **Price:** ~$17.9
- **CPU:** ARM Cortex-M4F @ 64MHz, FPU, DSP, HW crypto (CryptoCell-310)
- **RAM:** 256KB SRAM
- **Flash:** 1MB internal,2MB external QSPI
- **USB:** USB-C 2.0
- **Power:** 5V via USB-C,3.7V LiPo,5-6.5V solar
- **Dimensions:** 50.80 × 22.86mm

## Connectivity

Bluetooth BLE 5.0, Bluetooth Mesh

## Components

- **nRF52840** (mcu): Nordic Semiconductor nRF52840 SoC with ARM Cortex-M4F @ 64MHz, 1MB flash, 256KB SRAM, BLE 5.0, Bluetooth Mesh, 802.15.4, and CryptoCell-310 hardware crypto engine. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nordicsemi.com%2FProducts%2FnRF52840&ref=openhardware.directory&product=heltec-mesh-node-t114&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver supporting 150-960MHz frequency range with up to +22dBm TX power and -135dBm RX sensitivity at SF12/125kHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=heltec-mesh-node-t114&source=md-export)
- **L76K** (gps): Quectel L76K GNSS module supporting GPS, BeiDou, GLONASS, and QZSS constellations. Connected via UART and optional 8-pin 1.25mm connector. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fupload%2Fd%2Fdb%2FQuectel_L76K_Hardware_Design_V1.0.pdf&ref=openhardware.directory&product=heltec-mesh-node-t114&source=md-export)
- **ST7789** (display-driver): Sitronix ST7789 TFT LCD controller driving a 135x240 pixel display with 262K colors over SPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.buydisplay.com%2Fdownload%2Fic%2FST7789.pdf&ref=openhardware.directory&product=heltec-mesh-node-t114&source=md-export)
- **MX25R1635F** (flash-memory): Macronix MX25R1635F 16Mbit (2MB) serial NOR flash with QSPI interface, ultra-low power consumption, and wide voltage range (1.65-3.6V). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.macronix.com%2FLists%2FDatasheet%2FAttachments%2F8702%2FMX25R1635F%2C%2520Wide%2520Range%2C%252016Mb%2C%2520v1.6.pdf&ref=openhardware.directory&product=heltec-mesh-node-t114&source=md-export)
- **PCF8563** (rtc): NXP PCF8563 RTC footprint on I2C bus 0 (P0.26/P0.27). Not populated on V1 boards but available for future revisions or manual soldering. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FPCF8563.pdf&ref=openhardware.directory&product=heltec-mesh-node-t114&source=md-export)
- **SK6812** (rgb-led): Two SK6812 NeoPixel addressable RGB LEDs on GPIO14 for programmable status indication and visual feedback. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F1138%2FSK6812%2BLED%2Bdatasheet%2B.pdf&ref=openhardware.directory&product=heltec-mesh-node-t114&source=md-export)

## Protocols

- **SPI** (SPI0): SCK=GPIO19, MOSI=GPIO22, MISO=GPIO23
- **SPI** (SPI1): SCK=GPIO40, MOSI=GPIO41
- **I2C** (I2C0): SDA=GPIO26, SCL=GPIO27
- **I2C** (I2C1): SDA=GPIO16, SCL=GPIO13
- **UART** (UART0): TX=GPIO10, RX=GPIO9
- **UART** (UART1): TX=P1.05, RX=P1.07
- **QSPI**: SCK=P1.14, CS=P1.15, IO0=P1.12, IO1=P1.13, IO2=GPIO7, IO3=GPIO5

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO4 | A0 - Battery ADC | — | adc, digital-input, digital-output |
| GPIO5 | QSPI IO3 | — | digital-input, digital-output |
| GPIO6 | ADC Control | — | digital-output |
| GPIO7 | QSPI IO2 | — | digital-input, digital-output |
| GPIO9 | UART0 RX | — | digital-input, digital-output, pwm |
| GPIO10 | UART0 TX | — | digital-input, digital-output, pwm |
| GPIO11 | Display CS (ST7789) | — | digital-input, digital-output, pwm |
| GPIO12 | Display DC (ST7789) | — | digital-input, digital-output, pwm |
| GPIO13 | I2C1 SCL | — | digital-input, digital-output, pwm |
| GPIO14 | NeoPixel Data | — | digital-input, digital-output, pwm |
| GPIO15 | TFT Backlight | — | digital-input, digital-output, pwm |
| GPIO16 | I2C1 SDA | — | digital-input, digital-output, pwm |
| GPIO17 | SX1262 BUSY | — | digital-input |
| GPIO19 | LoRa SPI SCK | — | digital-input, digital-output, pwm |
| GPIO20 | SX1262 DIO1 | — | digital-input |
| GPIO21 | VEXT Enable | — | digital-output |
| GPIO22 | LoRa SPI MOSI | — | digital-input, digital-output, pwm |
| GPIO23 | LoRa SPI MISO | — | digital-input, digital-output, pwm |
| GPIO24 | SX1262 CS | — | digital-input, digital-output, pwm |
| GPIO25 | SX1262 RESET | — | digital-output |
| GPIO26 | I2C0 SDA (RTC) | — | digital-input, digital-output, pwm |
| GPIO27 | I2C0 SCL (RTC) | — | digital-input, digital-output, pwm |
| P1.02 | GPS Standby | — | digital-output |
| P1.03 | Green LED | — | digital-output |
| P1.04 | GPS PPS | — | digital-input |
| P1.05 | GPS UART TX (to GPS) | — | digital-input, digital-output |
| P1.07 | GPS UART RX (from GPS) | — | digital-input, digital-output |
| P1.10 | User Button | — | digital-input |
| P1.12 | QSPI IO0 (MOSI) | — | digital-input, digital-output |
| P1.13 | QSPI IO1 (MISO) | — | digital-input, digital-output |
| P1.14 | QSPI SCK | — | digital-input, digital-output |
| P1.15 | QSPI CS | — | digital-output |
| GPIO2 | Display Reset (ST7789) | — | digital-output |
| GPIO3 | TFT Power Control | — | digital-output |
| GPIO40 | Display SPI SCK | — | digital-input, digital-output, pwm |
| GPIO41 | Display SPI MOSI | — | digital-input, digital-output, pwm |

## Where to Buy

- [Heltec Official](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fmesh-node-t114%2F&ref=openhardware.directory&product=heltec-mesh-node-t114&source=md-export) — 17.90
- [Rokland](https://openhardware.directory/r?to=https%3A%2F%2Fstore.rokland.com%2Fproducts%2Fheltec-mesh-node-t114-with-optional-1-14-inch-tft-display&ref=openhardware.directory&product=heltec-mesh-node-t114&source=md-export) — 22.99
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-Positioning-Screen-GNSS-Case%2Fdp%2FB0DDLD3VG8&ref=openhardware.directory&product=heltec-mesh-node-t114&source=md-export) — 33.70

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fmesh-node-t114%2F&ref=openhardware.directory&product=heltec-mesh-node-t114&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltec_nRF52&ref=openhardware.directory&product=heltec-mesh-node-t114&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.org%2Fen%2Fnode%2Fnrf%2Fmesh_node_t114%2Findex.html&ref=openhardware.directory&product=heltec-mesh-node-t114&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FMesh_Node_T114%2FDatasheet.pdf&ref=openhardware.directory&product=heltec-mesh-node-t114&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FMesh_Node_T114%2FMeshNode-T114_V2.0_SCH%282%29.pdf&ref=openhardware.directory&product=heltec-mesh-node-t114&source=md-export)

## Tags

`meshtastic`, `lora`, `nrf52840`, `mesh-networking`, `gps-tracker`, `low-power`, `ble`

---
[View full device page](https://openhardware.directory/s/1370/heltec-mesh-node-t114)

---

# Arduino Nicla Vision

> Tiny 22.86mm AI vision module with STM32H747 dual-core Cortex-M7/M4, 2MP camera, WiFi/BLE, 6-axis IMU, microphone, and time-of-flight sensor — runs TinyML image recognition and OpenMV/MicroPython at the edge.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** module
- **Price:** ~$65
- **CPU:** ARM Cortex-M7 @ 480MHz,Cortex-M4 @ 240MHz
- **RAM:** 1MB SRAM
- **Flash:** 2MB
- **USB:** Micro-USB
- **Power:** 3.3V via Micro-USB or battery
- **Dimensions:** 22.86 × 22.86mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- micropython

## Components

- **STM32H747AII6** (mcu): STMicroelectronics STM32H747AII6 with Cortex-M7 at 480MHz and Cortex-M4 at 240MHz, 2MB flash, 1MB RAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32h747ai.pdf&ref=openhardware.directory&product=arduino-nicla-vision&source=md-export)
- **GC2145** (camera): GalaxyCore GC2145 2-megapixel CMOS image sensor for vision AI and image classification. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.galaxycore.com.cn%2FUploads%2Fimage%2FGC2145%2FGC2145_CSP_DataSheet_release_V1.0_20131201.pdf&ref=openhardware.directory&product=arduino-nicla-vision&source=md-export)
- **LSM6DSOX** (accelerometer): STMicroelectronics LSM6DSOX 6-axis IMU with embedded machine learning core. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flsm6dsox.pdf&ref=openhardware.directory&product=arduino-nicla-vision&source=md-export)
- **VL53L1CBV0FY** (sensor): STMicroelectronics VL53L1 long-range time-of-flight sensor for proximity and distance measurement. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fvl53l1x.pdf&ref=openhardware.directory&product=arduino-nicla-vision&source=md-export)

## Protocols

- **SPI**: notes=Via castellated pads
- **I2C**: notes=Via castellated pads

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Digital I/O | — | digital-input, digital-output |
| GPIO1 | Digital I/O | — | digital-input, digital-output |
| GPIO2 | Digital I/O | — | digital-input, digital-output |
| GPIO3 | Digital I/O | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fnicla-vision&ref=openhardware.directory&product=arduino-nicla-vision&source=md-export) — $65.00
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnicla-vision&ref=openhardware.directory&product=arduino-nicla-vision&source=md-export) — €71.83
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FABX00051%2F16733930&ref=openhardware.directory&product=arduino-nicla-vision&source=md-export) — $72.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FABX00051&ref=openhardware.directory&product=arduino-nicla-vision&source=md-export) — $72.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnicla-vision&ref=openhardware.directory&product=arduino-nicla-vision&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fnicla-vision%2F&ref=openhardware.directory&product=arduino-nicla-vision&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FABX00051-datasheet.pdf&ref=openhardware.directory&product=arduino-nicla-vision&source=md-export)

## Tags

`arduino`, `nicla`, `vision`, `camera`, `ai`, `tinyml`, `stm32`, `wifi`, `ble`

---
[View full device page](https://openhardware.directory/s/1370/arduino-nicla-vision)

---

# BigTreeTech SKR Mini E3 V1.2

> Ultra-quiet 32-bit 3D printer board with 4 integrated TMC2209 UART stepper drivers. STM32F103RCT6 @ 72MHz. Direct drop-in replacement for Ender 3. Supports Marlin and Klipper.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$38.99
- **CPU:** STM32F103RCT6
- **RAM:** 48KB
- **Flash:** 256KB
- **USB:** USB Micro-B
- **Power:** 12-24V DC

## Compatible Firmware

- Marlin
- Klipper

## Components

- **STM32F103RCT6** (MCU): STMicroelectronics STM32F103RCT6 32-bit ARM Cortex-M3 microcontroller, 256KB flash, 48KB RAM, running at 72MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32f103rc.pdf&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v1-2&source=md-export)
- **TMC2209 (integrated x4)** (Stepper Driver): 4x TRINAMIC TMC2209 stepper drivers integrated directly on the PCB with UART mode, StealthChop2, and stallGuard for sensorless homing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.trinamic.com%2Ffileadmin%2Fassets%2FProducts%2FICs_Documents%2FTMC2209_Datasheet_V103.pdf&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v1-2&source=md-export)
- **MicroSD slot** (Storage): MicroSD card slot for firmware updates and standalone print file storage — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-mini-e3-v1-2-32-bit-control-board-tft35-e3-v3-0-integrated-tmc2209-uart-for-ender-3&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v1-2&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-mini-e3-v1-2-32-bit-control-board-tft35-e3-v3-0-integrated-tmc2209-uart-for-ender-3&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v1-2&source=md-export) — $38.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBIGTREETECH-SKR-mini-E3&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v1-2&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-mini-e3-v1-2-32-bit-control-board-tft35-e3-v3-0-integrated-tmc2209-uart-for-ender-3&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v1-2&source=md-export)

## Tags

`3d-printer`, `control-board`, `stm32`, `marlin`, `klipper`, `bigtreetech`, `open-source`, `32-bit`, `tmc2209`, `ender-3`, `mini`, `integrated-drivers`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-skr-mini-e3-v1-2)

---

# Milk-V Duo S

> Compact RISC-V/ARM dev board with SG2000 SoC, 512MB RAM, optional WiFi 6/BT5, dual MIPI CSI cameras, 0.5 TOPS TPU. Runs Linux and RTOS simultaneously.

## Quick Facts

- **Brand:** Milk-V
- **Board Type:** SBC
- **Price:** ~$9.9
- **CPU:** SG2000
- **RAM:** 512MB
- **Flash:** eMMC (optional)
- **GPIO:** 39 pins
- **USB:** USB-C
- **Power:** 5V/1A

## Connectivity

WiFi WiFi 6 | Bluetooth 5.0 | Ethernet 100Mbps

## Components

- **SG2000** (Processor): Dual-core C906 RISC-V (1GHz + 700MHz) plus Cortex-A53 ARM core at 1GHz, with hardware boot-mode selection switch — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsophgo%2Fsophgo-doc%2Freleases%2Fdownload%2Fsg2000-trm-v1.02%2Fsg2000_trm_en_v1.02.pdf&ref=openhardware.directory&product=milk-v-duo-s&source=md-export)
- **CVITEK TPU** (NPU): Integrated tensor processing unit delivering 0.5 TOPS at INT8 precision for edge AI inference — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsophgo%2Fsophgo-doc%2Freleases%2Fdownload%2Fsg2000-trm-v1.02%2Fsg2000_trm_en_v1.02.pdf&ref=openhardware.directory&product=milk-v-duo-s&source=md-export)
- **8051** (MCU): 8051 microcontroller with 8KB SRAM for low-power standby and peripheral management — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsophgo%2Fsophgo-doc%2Freleases%2Fdownload%2Fsg2000-trm-v1.02%2Fsg2000_trm_en_v1.02.pdf&ref=openhardware.directory&product=milk-v-duo-s&source=md-export)

## Protocols

- **MIPI CSI**
- **MIPI DSI**
- **I2C**
- **SPI**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fmilkv.io%2Fduo-s&ref=openhardware.directory&product=milk-v-duo-s&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fmilkv-duo&ref=openhardware.directory&product=milk-v-duo-s&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsophgo%2Fsophgo-doc%2Freleases%2Fdownload%2Fsg2000-trm-v1.02%2Fsg2000_trm_en_v1.02.pdf&ref=openhardware.directory&product=milk-v-duo-s&source=md-export)

## Tags

`risc-v`, `arm`, `sbc`, `linux`, `rtos`, `wifi`, `bluetooth`, `tpu`, `milkv`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/milk-v-duo-s)

---

# LILYGO T-Echo Lite

> Simplified T-Echo with nRF52840, SX1262 LoRa, and optional L76K GPS — a low-cost, low-power LoRa node and Meshtastic-compatible board for off-grid mesh networking.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$13.41
- **CPU:** nRF52840 ARM Cortex-M4F @ 64MHz
- **RAM:** 256KB SRAM
- **Flash:** 1MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Connectivity

Bluetooth BLE 5.0 | Zigbee Zigbee (nRF52840)

## Compatible Firmware

- arduino
- platformio
- meshtastic
- meshcore

## Components

- **nRF52840** (mcu): Nordic Semiconductor nRF52840 ARM Cortex-M4F at 64MHz with 1MB Flash, 256KB RAM, supporting BLE 5, Thread, Zigbee, ANT, and 802.15.4. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52840_PS_v1.7.pdf&ref=openhardware.directory&product=lilygo-t-echo-lite&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver covering 433/868/915 MHz bands with +22 dBm output and -148 dBm sensitivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-echo-lite&source=md-export)
- **L76K** (gps): Quectel L76K multi-GNSS module supporting GPS, GLONASS, BeiDou, and QZSS constellations — available as optional add-on. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.quectel.com%2Fwp-content%2Fuploads%2F2021%2F03%2FQuectel_L76K_GNSS_Specification_V1.0.pdf&ref=openhardware.directory&product=lilygo-t-echo-lite&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-echo-lite&ref=openhardware.directory&product=lilygo-t-echo-lite&source=md-export) — $13.41

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-echo-lite&ref=openhardware.directory&product=lilygo-t-echo-lite&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Echo-Lite&ref=openhardware.directory&product=lilygo-t-echo-lite&source=md-export)

## Tags

`nrf52840`, `lora`, `meshtastic`, `lilygo`, `ble5`, `thread`, `zigbee`, `off-grid`, `low-power`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-echo-lite)

---

# Raspberry Pi 5

> The latest Raspberry Pi single-board computer featuring a BCM2712 quad-core Cortex-A76 processor at 2.4GHz, PCIe 2.0, dual 4K HDMI output, USB 3.0, and available in 2GB, 4GB, 8GB, and 16GB RAM configurations.

## Quick Facts

- **Brand:** Raspberry Pi
- **Board Type:** sbc
- **Price:** ~$60
- **CPU:** BCM2712 Cortex-A76
- **RAM:** 2GB / 4GB / 8GB / 16GB LPDDR4X
- **Flash:** microSD (external)
- **GPIO:** 40 pins
- **USB:** 2x USB 3.0 + 2x USB 2.0
- **Power:** USB-C 5V 5A

## Connectivity

WiFi 802.11ac | Bluetooth BLE 5.0 | Ethernet Gigabit

## Compatible Firmware

- raspberry-pi-os
- ubuntu
- home-assistant-os

## Protocols

- **I2C**: SDA=GPIO2, SCL=GPIO3
- **SPI**: MOSI=GPIO10, MISO=GPIO9, SCK=GPIO11, CE0=GPIO8, CE1=GPIO7
- **UART**: TX=GPIO14, RX=GPIO15
- **PCIe 2.0**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | SDA1 — I2C1 Data (Pin 3) | — | i2c, digital-input, digital-output |
| GPIO3 | SCL1 — I2C1 Clock (Pin 5) | — | i2c, digital-input, digital-output |
| GPIO4 | GPIO4 — General Purpose (Pin 7) | — | digital-input, digital-output |
| GPIO5 | GPIO5 — General Purpose (Pin 29) | — | digital-input, digital-output |
| GPIO6 | GPIO6 — General Purpose (Pin 31) | — | digital-input, digital-output |
| GPIO7 | CE1 — SPI0 Chip Enable 1 (Pin 26) | — | spi, digital-input, digital-output |
| GPIO8 | CE0 — SPI0 Chip Enable 0 (Pin 24) | — | spi, digital-input, digital-output |
| GPIO9 | MISO — SPI0 MISO (Pin 21) | — | spi, digital-input, digital-output |
| GPIO10 | MOSI — SPI0 MOSI (Pin 19) | — | spi, digital-input, digital-output |
| GPIO11 | SCLK — SPI0 Clock (Pin 23) | — | spi, digital-input, digital-output |
| GPIO12 | GPIO12 — PWM0 (Pin 32) | — | digital-input, digital-output, pwm |
| GPIO13 | GPIO13 — PWM1 (Pin 33) | — | digital-input, digital-output, pwm |
| GPIO14 | TXD — UART0 Transmit (Pin 8) | — | uart, digital-input, digital-output |
| GPIO15 | RXD — UART0 Receive (Pin 10) | — | uart, digital-input, digital-output |
| GPIO16 | GPIO16 — General Purpose (Pin 36) | — | digital-input, digital-output |
| GPIO17 | GPIO17 — General Purpose (Pin 11) | — | digital-input, digital-output |
| GPIO18 | GPIO18 — PWM0 / PCM CLK (Pin 12) | — | digital-input, digital-output, pwm |
| GPIO19 | GPIO19 — PWM1 / PCM FS (Pin 35) | — | digital-input, digital-output, pwm |
| GPIO20 | GPIO20 — PCM DIN (Pin 38) | — | digital-input, digital-output |
| GPIO21 | GPIO21 — PCM DOUT (Pin 40) | — | digital-input, digital-output |
| GPIO22 | GPIO22 — General Purpose (Pin 15) | — | digital-input, digital-output |
| GPIO23 | GPIO23 — General Purpose (Pin 16) | — | digital-input, digital-output |
| GPIO24 | GPIO24 — General Purpose (Pin 18) | — | digital-input, digital-output |
| GPIO25 | GPIO25 — General Purpose (Pin 22) | — | digital-input, digital-output |
| GPIO26 | GPIO26 — General Purpose (Pin 37) | — | digital-input, digital-output |
| GPIO27 | GPIO27 — General Purpose (Pin 13) | — | digital-input, digital-output |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fraspberry-pi-5-options&ref=openhardware.directory&product=raspberry-pi-5&source=md-export) — $60

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fproducts%2Fraspberry-pi-5%2F&ref=openhardware.directory&product=raspberry-pi-5&source=md-export)

## Tags

`raspberry-pi`, `sbc`, `arm`, `cortex-a76`, `linux`, `pcie`, `4k-hdmi`

---
[View full device page](https://openhardware.directory/s/1370/raspberry-pi-5)

---

# OV2640 Camera Module

> 2-megapixel camera module with SCCB/I2C interface, commonly used with ESP32-CAM and other microcontroller boards for image capture, video streaming, and computer vision projects.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** camera-module
- **Price:** ~$10.99
- **CPU:** N/A (passive sensor module)
- **RAM:** N/A
- **Flash:** N/A
- **Power:** 2.5-3.3V via host board

## Components

- **OV2640** (sensor): OmniVision 2-megapixel CMOS image sensor supporting UXGA (1622x1200) resolution with built-in JPEG compression, auto exposure, and auto white balance — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2FOV2640_DS.pdf&ref=openhardware.directory&product=ov2640-camera-module&source=md-export)

## Protocols

- **I2C**
- **SCCB**
- **DVP**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fov2640-camera-board&ref=openhardware.directory&product=ov2640-camera-module&source=md-export) — $10.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fov2640-camera-board.htm&ref=openhardware.directory&product=ov2640-camera-module&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp32-camera&ref=openhardware.directory&product=ov2640-camera-module&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.uctronics.com%2Fdownload%2FOV2640_DS.pdf&ref=openhardware.directory&product=ov2640-camera-module&source=md-export)

## Tags

`camera-module`, `ov2640`, `esp32-cam`, `sccb`, `i2c`, `2mp`, `image-sensor`

---
[View full device page](https://openhardware.directory/s/1370/ov2640-camera-module)

---

# Flipper Zero Video Game Module

> RP2040-powered expansion module for Flipper Zero with DVI-D video output, 6-axis IMU motion sensor, 14-pin GPIO breakout, and USB-C. Fully open-source firmware and schematics.

## Quick Facts

- **Brand:** Flipper Devices
- **Board Type:** expansion-module
- **Price:** ~$49
- **CPU:** ARM Cortex-M0+ dual-core @ 133MHz (RP2040)
- **RAM:** 264KB SRAM
- **Flash:** 16MB
- **GPIO:** 11 pins
- **USB:** USB-C
- **Power:** 5V via USB-C or Flipper Zero

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- Flipper Zero Game Engine
- pico-sdk
- arduino

## Components

- **RP2040** (mcu): Dual-core ARM Cortex-M0+ microcontroller at 133 MHz with 264KB SRAM, programmable I/O (PIO), and USB 1.1. Handles video signal generation via PIO and runs game/application firmware. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=flipper-zero-video-game-module&source=md-export)
- **icm-42688-p** (imu): High-precision 6-axis MEMS inertial measurement unit with 3-axis gyroscope and 3-axis accelerometer. Connected via SPI to both RP2040 and Flipper Zero for motion-controlled games and sensor applications. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fwp-content%2Fuploads%2F2020%2F04%2Fds-000347_icm-42688-p-datasheet.pdf&ref=openhardware.directory&product=flipper-zero-video-game-module&source=md-export)

## Protocols

- **SPI**
- **USB**
- **DVI-D**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO 0-7 | General purpose I/O on 14-pin breakout | — | — |
| GPIO 16-17 | General purpose I/O on 14-pin breakout | — | — |
| GPIO 21-22 | General purpose I/O on 14-pin breakout | — | — |
| GPIO 26-28 | ADC-capable GPIO on 14-pin breakout | — | — |
| GPIO 8-15, 18-20 | DVI-D video output (dedicated) | — | — |
| 3.3V | 3.3V power output | — | — |
| GND x2 | Ground pins | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Flipper Store](https://openhardware.directory/r?to=https%3A%2F%2Fflipper.net%2Fproducts%2Fvideo-game-module-for-flipper-zero&ref=openhardware.directory&product=flipper-zero-video-game-module&source=md-export) — $49.00

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fflipper.net%2Fproducts%2Fvideo-game-module-for-flipper-zero&ref=openhardware.directory&product=flipper-zero-video-game-module&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fflipperdevices%2Fvideo-game-module&ref=openhardware.directory&product=flipper-zero-video-game-module&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.flipper.net%2Fvideo-game-module&ref=openhardware.directory&product=flipper-zero-video-game-module&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.flipper.net%2Fvideo-game-module%2Fgpio&ref=openhardware.directory&product=flipper-zero-video-game-module&source=md-export)

## Tags

`flipper-zero`, `rp2040`, `video-game-module`, `dvi-output`, `imu`, `motion-sensor`, `open-source`, `raspberry-pi-pico`, `game-development`, `expansion-module`

---
[View full device page](https://openhardware.directory/s/1370/flipper-zero-video-game-module)

---

# DFRobot FireBeetle 2 M0

> Compact, low-power ARM Cortex-M0+ development board with ATSAMD21G18 MCU, 16MB SPI flash, USB-C, WS2812 RGB LED, and FPC display connector, ideal for IoT and low-power applications.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** dev-board
- **Price:** ~$8.9
- **CPU:** ARM Cortex-M0+ @ 48MHz, single-core
- **RAM:** 32KB SRAM
- **Flash:** 256KB + 16MB SPI Flash
- **USB:** USB-C
- **Power:** 3.3V-5.5V via USB-C or battery
- **Dimensions:** 25.4 × 60mm

## Components

- **ATSAMD21G18** (mcu): Microchip ATSAMD21G18 ARM Cortex-M0+ single-core microcontroller at 48MHz with 256KB flash, 32KB SRAM, 12-bit ADC, 10-bit DAC, and extensive peripheral support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2Fdevicedoc%2F40001884a.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-m0&source=md-export)
- **WS2812B** (led-driver): Onboard WS2812 addressable RGB LED for status indication, connected to pin 8. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-m0&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0/RX1 | Serial1 RX | — | digital-input, digital-output, adc |
| D1/TX1 | Serial1 TX | — | digital-input, digital-output, adc |
| D2 | GPIO | — | digital-input, digital-output, pwm |
| D3 | GPIO | — | digital-input, digital-output, pwm |
| D5 | GPIO | — | digital-input, digital-output, pwm |
| D6 | GPIO | — | digital-input, digital-output, pwm |
| D7 | GPIO | — | digital-input, digital-output, pwm |
| D8 | WS2812 RGB LED | — | digital-input, digital-output, pwm |
| D9 | GPIO | — | digital-input, digital-output, pwm |
| D10 | GPIO | — | digital-input, digital-output, pwm |
| D11 | GPIO | — | digital-input, digital-output, pwm |
| D12 | GPIO | — | digital-input, digital-output, pwm |
| D13 | Built-in LED | — | digital-input, digital-output, pwm |
| A0 | DAC Output | — | digital-input, digital-output, adc, dac, pwm |
| A1 | Analog Input | — | digital-input, digital-output, adc, pwm |
| A2 | Analog Input | — | digital-input, digital-output, adc, pwm |
| A3 | Analog Input | — | digital-input, digital-output, adc, pwm |
| A4 | Analog Input | — | digital-input, digital-output, adc, pwm |
| A5 | Analog Input | — | digital-input, digital-output, adc, pwm |
| SCK | SPI Clock | — | digital-input, digital-output |
| MOSI | SPI MOSI | — | digital-input, digital-output |
| MISO | SPI MISO | — | digital-input, digital-output |
| SDA | I2C Data | — | digital-input, digital-output |
| SCL | I2C Clock | — | digital-input, digital-output |
| RX | Serial2 RX | — | digital-input, digital-output |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2095.html&ref=openhardware.directory&product=dfrobot-firebeetle-2-m0&source=md-export) — 8.90
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2Fnew%2Fdfrobot%2Fdfrobot-dfr0652-firebeetle-board%2F&ref=openhardware.directory&product=dfrobot-firebeetle-2-m0&source=md-export) — 8.90
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Fdfrobot%2FDFR0652%2F13280123&ref=openhardware.directory&product=dfrobot-firebeetle-2-m0&source=md-export) — 8.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2095.html&ref=openhardware.directory&product=dfrobot-firebeetle-2-m0&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FFireBeetle_Board_M0_V1.0_SKU_DFR0652&ref=openhardware.directory&product=dfrobot-firebeetle-2-m0&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdfimg.dfrobot.com%2Fwiki%2F20200%2FDFR0652_firebeelte-m0-board_datasheet_V1.0.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-m0&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdfimg.dfrobot.com%2Fwiki%2F20200%2FDFR0652_firebeelte-m0-board_schematics_V1.0.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-2-m0&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-firebeetle-2-m0)

---

# LattePanda 3 Delta

> Pocket-sized x86 single board computer with Intel Celeron N5105 quad-core, 8GB LPDDR4 RAM, 64GB eMMC, Wi-Fi 6, 2.5GbE, triple display output, and an integrated Arduino Leonardo co-processor.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** sbc
- **Price:** ~$259
- **CPU:** Intel Celeron N5105 quad-core @ 2.0-2.9GHz, Intel UHD Graphics
- **RAM:** 8GB LPDDR4 2933MHz
- **Flash:** 64GB eMMC V5.1
- **USB:** 2x USB 3.2 Gen1 Type-A, 1x USB 3.2 Gen2 Type-A, 1x USB-C (PD/DP/USB 2.0)
- **Power:** 12V DC or USB-C PD 15V (45W adapter included)
- **Dimensions:** 125 × 78 × 16mm

## Connectivity

WiFi 802.11 ax (Wi-Fi 6) 2.4/5GHz 160MHz | Bluetooth Bluetooth 5.2 | Ethernet 2.5 Gigabit

## Components

- **Intel-N5105** (sbc): Intel Celeron N5105 Jasper Lake quad-core x86 processor at 2.0-2.9GHz with Intel UHD Graphics (450-800MHz) and 10W TDP. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.intel.com%2Fcontent%2Fwww%2Fus%2Fen%2Fproducts%2Fsku%2F212328%2Fintel-celeron-processor-n5105-4m-cache-up-to-2-90-ghz%2Fspecifications.html&ref=openhardware.directory&product=lattepanda-3-delta&source=md-export)
- **ATMEGA32U4** (mcu): Integrated ATMEGA32U4 AVR microcontroller providing Arduino Leonardo-compatible GPIO with 12 analog inputs and 20 digital I/O. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2Fdevicedoc%2Fatmel-7766-8-bit-avr-atmega16u4-32u4_datasheet.pdf&ref=openhardware.directory&product=lattepanda-3-delta&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | Digital I/O | — | digital-input, digital-output |
| D1 | Digital I/O | — | digital-input, digital-output |
| D2 | Digital I/O | — | digital-input, digital-output |
| D3 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| D4 | Digital I/O | — | digital-input, digital-output |
| D5 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| D6 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output |
| D8 | Digital I/O | — | digital-input, digital-output |
| D9 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| D10 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| D11 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| D12 | Digital I/O | — | digital-input, digital-output |
| D13 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| A0 | Analog Input | — | digital-input, digital-output, adc |
| A1 | Analog Input | — | digital-input, digital-output, adc |
| A2 | Analog Input | — | digital-input, digital-output, adc |
| A3 | Analog Input | — | digital-input, digital-output, adc |
| A4 | Analog Input | — | digital-input, digital-output, adc |
| A5 | Analog Input | — | digital-input, digital-output, adc |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2594.html&ref=openhardware.directory&product=lattepanda-3-delta&source=md-export) — 259.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2594.html&ref=openhardware.directory&product=lattepanda-3-delta&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLattePandaTeam%2FLattePanda-Win10-Software&ref=openhardware.directory&product=lattepanda-3-delta&source=md-export)
- [wiki](https://openhardware.directory/r?to=http%3A%2F%2Fdocs.lattepanda.com%2Fcontent%2F3rd_delta_edition%2Fget_started%2F&ref=openhardware.directory&product=lattepanda-3-delta&source=md-export)

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/lattepanda-3-delta)

---

# LattePanda IOTA

> Palm-sized x86 SBC with Intel N150 quad-core (up to 3.6GHz), 16GB LPDDR5, 128GB eMMC, RP2040 co-processor, Gigabit Ethernet, HDMI 2.1, and Windows 11 IoT Enterprise — in the classic LattePanda V1 form factor.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** sbc
- **Price:** ~$245
- **CPU:** Intel N150 quad-core @ 3.6GHz turbo, Intel UHD Graphics
- **RAM:** 16GB LPDDR5 4800MT/s (IBECC)
- **Flash:** 128GB eMMC 5.1
- **USB:** 3x USB 3.2 Gen2 Type-A (10Gbps), 1x USB-C PD
- **Power:** USB-C PD 15V or 10-15V DC (PH2.0 4-pin)
- **Dimensions:** 88 × 70 × 19mm

## Connectivity

Ethernet Gigabit (Wake-on-LAN)

## Components

- **Intel-N150** (sbc): Intel Processor N150 (Twin Lake) quad-core x86 CPU at up to 3.6GHz with Intel UHD Graphics and configurable 6-15W TDP. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.intel.com%2Fcontent%2Fwww%2Fus%2Fen%2Fproducts%2Fsku%2F238082%2Fintel-processor-n150-6m-cache-up-to-3-60-ghz%2Fspecifications.html&ref=openhardware.directory&product=lattepanda-iota&source=md-export)
- **RP2040** (mcu): Raspberry Pi RP2040 dual-core ARM Cortex-M0+ microcontroller providing real-time GPIO with up to 16 digital I/O and 3 analog inputs. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=lattepanda-iota&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | Digital I/O | — | digital-input, digital-output |
| D1 | Digital I/O | — | digital-input, digital-output |
| D2 | Digital I/O | — | digital-input, digital-output |
| D3 | Digital I/O | — | digital-input, digital-output |
| D4 | Digital I/O | — | digital-input, digital-output |
| D5 | Digital I/O | — | digital-input, digital-output |
| D6 | Digital I/O | — | digital-input, digital-output |
| D7 | Digital I/O | — | digital-input, digital-output |
| D8 | Digital I/O | — | digital-input, digital-output |
| D9 | Digital I/O | — | digital-input, digital-output |
| D10 | Digital I/O | — | digital-input, digital-output |
| D11 | Digital I/O | — | digital-input, digital-output |
| D12 | Digital I/O | — | digital-input, digital-output |
| D13 | Digital I/O | — | digital-input, digital-output |
| A0 | Analog Input | — | digital-input, digital-output, adc |
| A1 | Analog Input | — | digital-input, digital-output, adc |
| A2 | Analog Input | — | digital-input, digital-output, adc |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2981.html&ref=openhardware.directory&product=lattepanda-iota&source=md-export) — 245.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2981.html&ref=openhardware.directory&product=lattepanda-iota&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLattePandaTeam%2FLattePanda-3D-Models&ref=openhardware.directory&product=lattepanda-iota&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.lattepanda.com%2Fcontent%2Fiota_edition%2Fget_started%2F&ref=openhardware.directory&product=lattepanda-iota&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/lattepanda-iota)

---

# Olimex ESP32-C6-EVB

> Open-source hardware evaluation board with ESP32-C6, 4 mains-rated relays, 4 opto-isolated inputs, and WiFi 6/Thread/Zigbee/Matter connectivity for home and industrial automation.

## Quick Facts

- **Brand:** Olimex
- **Board Type:** dev-board
- **Price:** ~$14
- **CPU:** RISC-V single-core @ 160MHz
- **RAM:** 512KB HP SRAM + 16KB LP SRAM
- **Flash:** 4MB
- **USB:** USB-C (power + JTAG)
- **Power:** USB-C or 8-50V DC jack
- **Dimensions:** 100 × 70mm

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.0 | Zigbee Zigbee 3.0

## Compatible Firmware

- arduino
- esp-idf
- esphome
- tasmota

## Components

- **ESP32-C6-WROOM-1-N4** (mcu): Espressif ESP32-C6-WROOM-1-N4 module with RISC-V @ 160MHz, 4MB flash, WiFi 6, BLE 5, and IEEE 802.15.4 for Thread/Zigbee/Matter. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=olimex-esp32-c6-evb&source=md-export)
- **relay** (relay): Four electromechanical relays rated 10A at 240VAC for switching mains-voltage loads. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FOLIMEX%2FESP32-C6-EVB&ref=openhardware.directory&product=olimex-esp32-c6-evb&source=md-export)

## Protocols

- **UEXT**
- **I2C**
- **SPI**
- **UART**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| RELAY1 | Relay 1 control | — | digital-output |
| RELAY2 | Relay 2 control | — | digital-output |
| RELAY3 | Relay 3 control | — | digital-output |
| RELAY4 | Relay 4 control | — | digital-output |
| IN1 | Opto-isolated input 1 | — | digital-input |
| IN2 | Opto-isolated input 2 | — | digital-input |
| IN3 | Opto-isolated input 3 | — | digital-input |
| IN4 | Opto-isolated input 4 | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Olimex](https://openhardware.directory/r?to=https%3A%2F%2Fwww.olimex.com%2FProducts%2FIoT%2FESP32-C6%2FESP32-C6-EVB%2F&ref=openhardware.directory&product=olimex-esp32-c6-evb&source=md-export) — 12.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.olimex.com%2FProducts%2FIoT%2FESP32-C6%2FESP32-C6-EVB%2Fopen-source-hardware&ref=openhardware.directory&product=olimex-esp32-c6-evb&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FOLIMEX%2FESP32-C6-EVB&ref=openhardware.directory&product=olimex-esp32-c6-evb&source=md-export)

## Tags

`matter`, `thread`, `zigbee`, `wifi6`, `esp32-c6`, `relay`, `industrial`, `open-hardware`, `cern-ohl`, `home-automation`

---
[View full device page](https://openhardware.directory/s/1370/olimex-esp32-c6-evb)

---

# FriendlyElec NanoPi M6

> Compact 62×90mm RK3588S SBC with up to 32GB LPDDR5, M.2 NVMe, 8K HDMI, and USB-C PD — a versatile Linux developer board for AI, media, and embedded applications.

## Quick Facts

- **Brand:** FriendlyElec
- **Price:** ~$89
- **CPU:** ARM Cortex-A76 ×4 @ 2.4GHz + Cortex-A55 ×4 @ 1.8GHz
- **RAM:** 4GB / 8GB / 16GB / 32GB LPDDR5 @ 2400MHz
- **Flash:** eMMC module socket (HS400) + M.2 NVMe (PCIe)
- **USB:** 1× USB 3.0 Type-A, 2× USB 2.0 Type-A, 1× USB-C (PD 6–20V)
- **Power:** USB-C PD 6–20V (65W recommended)
- **Dimensions:** 62 × 90 × 1.6mm

## Connectivity

Ethernet 1× Gigabit Ethernet

## Components

- **RK3588S** (soc): Rockchip RK3588S: 4× Cortex-A76 @ 2.4GHz + 4× Cortex-A55 @ 1.8GHz, Mali-G610 MP4 GPU, 6 TOPS NPU, 8K H.265/VP9 decode @ 60fps. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=friendlyelec-nanopi-m6&source=md-export)
- **Mali-G610** (gpu): ARM Mali-G610 MP4 GPU supporting OpenGL ES 1.1/2.0/3.2, OpenCL 2.2, and Vulkan 1.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.arm.com%2FProcessors%2FMali-G610&ref=openhardware.directory&product=friendlyelec-nanopi-m6&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| Pin 3 | I2C0_SDA | — | digital-input, digital-output, i2c |
| Pin 5 | I2C0_SCL | — | digital-input, digital-output, i2c |
| Pin 8 | UART2_TX | — | digital-output, uart |
| Pin 10 | UART2_RX | — | digital-input, uart |
| Pin 11 | GPIO3_B2 | — | digital-input, digital-output |
| Pin 13 | GPIO3_B3 | — | digital-input, digital-output |
| Pin 15 | GPIO3_B4 | — | digital-input, digital-output |
| Pin 16 | GPIO3_B5 | — | digital-input, digital-output |
| Pin 18 | SPI0_CLK | — | digital-output, spi |
| Pin 19 | SPI0_MOSI | — | digital-output, spi |
| Pin 21 | SPI0_MISO | — | digital-input, spi |
| Pin 22 | GPIO3_C0 | — | digital-input, digital-output |
| Pin 24 | SPI0_CSn0 | — | digital-output, spi |
| Pin 26 | GPIO3_C2 | — | digital-input, digital-output |
| Pin 27 | I2C1_SDA | — | digital-input, digital-output, i2c |
| Pin 28 | I2C1_SCL | — | digital-input, digital-output, i2c |
| Pin 29 | GPIO1_A1 | — | digital-input, digital-output |
| Pin 30 | GPIO1_A2 | — | digital-input, digital-output |

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D301&ref=openhardware.directory&product=friendlyelec-nanopi-m6&source=md-export) — 89.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D301&ref=openhardware.directory&product=friendlyelec-nanopi-m6&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_M6&ref=openhardware.directory&product=friendlyelec-nanopi-m6&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=friendlyelec-nanopi-m6&source=md-export)

## Tags

`rk3588s`, `linux`, `arm`, `sbc`, `npu`, `friendlyelec`, `rockchip`, `embedded`, `lpddr5`

---
[View full device page](https://openhardware.directory/s/1370/friendlyelec-nanopi-m6)

---

# Radxa ROCK 5C

> 86×56mm RK3588S2 SBC with up to 32GB LPDDR4x, WiFi 6, BT 5.4, GbE with PoE, 8K HDMI 2.1, 40-pin GPIO, Raspberry Pi PCIe FFC connector, and a price starting at $57 — Radxa's compact flagship for the RPi form factor.

## Quick Facts

- **Brand:** Radxa
- **Price:** ~$57.11
- **CPU:** ARM Cortex-A76 ×4 @ 2.4GHz + Cortex-A55 ×4 @ 1.8GHz
- **RAM:** 2GB / 4GB / 8GB / 16GB / 32GB LPDDR4x
- **Flash:** eMMC module socket
- **USB:** 2× USB 2.0 Type-A, 1× USB 3.0 Host, 1× USB 3.0 OTG
- **Power:** USB-C 5V (or PoE via HAT)
- **Dimensions:** 86 × 56mm

## Connectivity

WiFi 802.11 a/b/g/n/ac/ax (WiFi 6) | Bluetooth Bluetooth 5.4 | Ethernet Gigabit Ethernet with PoE support

## Components

- **RK3588S** (soc): Rockchip RK3588S2: 4× Cortex-A76 @ 2.4GHz + 4× Cortex-A55 @ 1.8GHz, Mali-G610 MP4 GPU, 6 TOPS NPU, 8K H.265/VP9 decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=radxa-rock-5c&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| Pin 3 | I2C_SDA | — | digital-input, digital-output, i2c |
| Pin 5 | I2C_SCL | — | digital-input, digital-output, i2c |
| Pin 7 | GPIO | — | digital-input, digital-output |
| Pin 8 | UART_TX | — | digital-output, uart |
| Pin 10 | UART_RX | — | digital-input, uart |
| Pin 11 | GPIO | — | digital-input, digital-output |
| Pin 13 | GPIO | — | digital-input, digital-output |
| Pin 15 | GPIO | — | digital-input, digital-output |
| Pin 16 | GPIO | — | digital-input, digital-output |
| Pin 18 | GPIO | — | digital-input, digital-output |
| Pin 19 | SPI_MOSI | — | digital-output, spi |
| Pin 21 | SPI_MISO | — | digital-input, spi |
| Pin 22 | GPIO | — | digital-input, digital-output |
| Pin 23 | SPI_CLK | — | digital-output, spi |
| Pin 24 | SPI_CSn | — | digital-output, spi |
| Pin 26 | GPIO | — | digital-input, digital-output |
| Pin 27 | I2C_SDA (alt) | — | digital-input, digital-output, i2c |
| Pin 28 | I2C_SCL (alt) | — | digital-input, digital-output, i2c |
| Pin 29 | GPIO | — | digital-input, digital-output |
| Pin 31 | GPIO | — | digital-input, digital-output |
| Pin 32 | PWM | — | digital-output, pwm |
| Pin 33 | PWM | — | digital-output, pwm |
| Pin 35 | GPIO | — | digital-input, digital-output |
| Pin 36 | GPIO | — | digital-input, digital-output |
| Pin 37 | GPIO | — | digital-input, digital-output |
| Pin 38 | GPIO | — | digital-input, digital-output |
| Pin 40 | GPIO | — | digital-input, digital-output |

## Where to Buy

- [Radxa](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Frock5%2F5c%2F&ref=openhardware.directory&product=radxa-rock-5c&source=md-export) — 57.11

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Frock5%2F5c%2F&ref=openhardware.directory&product=radxa-rock-5c&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdl.radxa.com%2Frock5%2F5c%2Fdocs%2Fhw%2Fv1100%2Fradxa_rock5c_product_brief.pdf&ref=openhardware.directory&product=radxa-rock-5c&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fradxa&ref=openhardware.directory&product=radxa-rock-5c&source=md-export)

## Tags

`rk3588s`, `linux`, `arm`, `sbc`, `wifi6`, `npu`, `radxa`, `raspberry-pi-compatible`, `poe`, `rockchip`

---
[View full device page](https://openhardware.directory/s/1370/radxa-rock-5c)

---

# Radxa Rock 5 ITX

> Mini-ITX single-board computer powered by Rockchip RK3588 with 16GB LPDDR4X, dual NVMe slots, dual 2.5GbE, PCIe x4, ATX power, and WiFi 6 — a true desktop motherboard replacement.

## Quick Facts

- **Brand:** Radxa
- **Board Type:** linux-sbc
- **Price:** ~$99.9
- **CPU:** Rockchip RK3588
- **RAM:** 16GB LPDDR4X
- **Flash:** eMMC socket (optional)
- **Power:** ATX 24-pin

## Connectivity

WiFi WiFi 6 (802.11ax) | Bluetooth BLE 5.0 | Ethernet 2x 2.5 GbE

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arace Tech](https://openhardware.directory/r?to=https%3A%2F%2Farace.tech%2Fproducts%2Fradxa-rock-5-itx&ref=openhardware.directory&product=radxa-rock-5-itx&source=md-export) — $99.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Frock5%2F5-itx&ref=openhardware.directory&product=radxa-rock-5-itx&source=md-export)
- [armbian](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fradxa-rock-5-itx%2F&ref=openhardware.directory&product=radxa-rock-5-itx&source=md-export)

## Tags

`radxa`, `rock5-itx`, `rk3588`, `mini-itx`, `nas`, `linux`, `armbian`, `nvme`, `2.5gbe`

---
[View full device page](https://openhardware.directory/s/1370/radxa-rock-5-itx)

---

# Banana Pi M2+

> Banana Pi M2+ is a compact SBC powered by the Allwinner H3 quad-core SoC with 1GB DDR3, 8GB eMMC, 802.11n WiFi, Bluetooth 4.0, four USB 2.0 ports, and micro-USB power.

## Quick Facts

- **Brand:** Banana Pi
- **Board Type:** linux-sbc
- **Price:** ~$35
- **CPU:** Allwinner H3
- **RAM:** 1GB DDR3
- **Flash:** 8GB eMMC
- **USB:** 4x USB 2.0 + micro-USB OTG
- **Power:** 5V micro-USB

## Connectivity

WiFi WiFi 4 (802.11 b/g/n) | Bluetooth BT 4.0 | Ethernet Fast Ethernet (10/100M)

## Compatible Firmware

- armbian

## Components

- **Allwinner H3** (soc): Allwinner H3 quad-core Cortex-A7 SoC at 1.2GHz with Mali-400 MP2 GPU, widely used in affordable maker SBCs. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flinux-sunxi.org%2Fimages%2F4%2F4e%2FH3_Datasheet_v1.2.pdf&ref=openhardware.directory&product=bananapi-m2-plus&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Banana Pi](https://openhardware.directory/r?to=https%3A%2F%2Fwww.banana-pi.org%2Fen%2Fbanana-pi-sbcs%2F45.html&ref=openhardware.directory&product=bananapi-m2-plus&source=md-export) — $35.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fbanana-pi-m2-plus%2F&ref=openhardware.directory&product=bananapi-m2-plus&source=md-export)
- [vendor](https://openhardware.directory/r?to=https%3A%2F%2Fwww.banana-pi.org%2Fen%2Fbanana-pi-sbcs%2F45.html&ref=openhardware.directory&product=bananapi-m2-plus&source=md-export)

## Tags

`banana-pi`, `allwinner`, `h3`, `sbc`, `linux`, `armbian`, `wifi`, `bluetooth`, `usb2`, `single-board-computer`, `compact`, `affordable`

---
[View full device page](https://openhardware.directory/s/1370/bananapi-m2-plus)

---

# Pine64 / LTS

> Affordable 64-bit Linux SBC by Pine64, powered by the Allwinner A64 SoC with up to 2GB LPDDR3, Gigabit Ethernet, 2× USB 2.0, and microSD — available in standard and Long-Term Support variants.

## Quick Facts

- **Brand:** Pine64
- **Board Type:** linux-sbc
- **Price:** ~$39
- **CPU:** Quad-core Cortex-A53 @ 1.152GHz (Allwinner A64)
- **RAM:** 2GB LPDDR3
- **Flash:** microSD only
- **USB:** 2× USB 2.0 Type-A
- **Power:** 5V via barrel jack

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- armbian

## Components

- **Allwinner-A64** (soc): Allwinner A64 quad-core Cortex-A53 @ 1.152GHz SoC with Mali-400 GPU — first 64-bit Allwinner processor for maker boards. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flinux-sunxi.org%2FA64&ref=openhardware.directory&product=pine64&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Pine Store](https://openhardware.directory/r?to=https%3A%2F%2Fpine64.com%2Fproduct%2Fpine-a64-lts%2F&ref=openhardware.directory&product=pine64&source=md-export) — $39.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.pine64.org%2Fdevices%2Fsingle-board-computers%2Fpine-a64%2F&ref=openhardware.directory&product=pine64&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fpine64%2F&ref=openhardware.directory&product=pine64&source=md-export)

## Tags

`64-bit`, `allwinner`, `a64`, `affordable`, `gigabit`, `server`, `nas`, `pine64`

---
[View full device page](https://openhardware.directory/s/1370/pine64)

---

# Adafruit Feather M0 Bluefruit LE

> ARM Cortex-M0+ dev board with Bluetooth LE (nRF51822) in the compact Feather form factor. Features 256KB flash, 32KB RAM, native USB, and a built-in LiPo charger for wireless wearable and IoT projects.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$29.95
- **CPU:** ATSAMD21G18 ARM Cortex-M0+ @ 48 MHz
- **RAM:** 32KB SRAM
- **Flash:** 256KB
- **Power:** 5V + LiPo
- **Dimensions:** 51.2 × 22.8 × 8 mm

## Connectivity

Bluetooth BLE 4.0 (nRF51822)

## Compatible Firmware

- arduino
- circuitpython

## Components

- **ATSAMD21G18** (mcu): ARM Cortex-M0+ microcontroller at 48MHz with 256KB flash, 32KB RAM, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fimages%2Fproduct-files%2F2772%2Fatmel-42181-sam-d21_datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-m0-bluefruit-le&source=md-export)
- **nRF51822 (MDBT40)** (ble-module): Nordic Semiconductor BLE 4.0 SoC providing Bluetooth Low Energy connectivity via the MDBT40 module. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F2267%2FMDBT40-P256R.pdf&ref=openhardware.directory&product=adafruit-feather-m0-bluefruit-le&source=md-export)

## Protocols

- **SPI**: MOSI=PA16, MISO=PA19, SCK=PA17
- **I2C**: SDA=PA22, SCL=PA23
- **UART**: TX=PA10, RX=PA11
- **BLE**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA11 | RX — UART Receive | — | digital-input, digital-output |
| PA10 | TX — UART Transmit | — | digital-input, digital-output |
| PA15 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA20 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA07 | D9 — GPIO / PWM / Analog | — | digital-input, digital-output, pwm, analog-input |
| PA18 | D10 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA16 | D11 — SPI MOSI | — | digital-input, digital-output |
| PA19 | D12 — SPI MISO | — | digital-input, digital-output |
| PA17 | D13 — SPI SCK / LED | — | digital-input, digital-output |
| PA22 | SDA — I2C Data | — | digital-input, digital-output |
| PA23 | SCL — I2C Clock | — | digital-input, digital-output |
| PA02 | A0 — Analog In / DAC Out | — | analog-input, analog-output |
| PB08 | A1 — Analog In | — | analog-input |
| PB09 | A2 — Analog In | — | analog-input |
| PA04 | A3 — Analog In | — | analog-input |
| PA05 | A4 — Analog In | — | analog-input |
| PB02 | A5 — Analog In | — | analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2995&ref=openhardware.directory&product=adafruit-feather-m0-bluefruit-le&source=md-export) — 29.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2995&ref=openhardware.directory&product=adafruit-feather-m0-bluefruit-le&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-M0-Bluefruit-LE-PCB&ref=openhardware.directory&product=adafruit-feather-m0-bluefruit-le&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-m0-bluefruit-le%2Foverview&ref=openhardware.directory&product=adafruit-feather-m0-bluefruit-le&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fimages%2Fproduct-files%2F2772%2Fatmel-42181-sam-d21_datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-m0-bluefruit-le&source=md-export)

## Tags

`feather`, `ble`, `bluetooth`, `arm-cortex-m0`, `atsamd21`, `nrf51822`, `wearable`, `lipo-charger`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-m0-bluefruit-le)

---

# Arduino Yún

> Hybrid Arduino/Linux board combining ATmega32U4 with a MIPS-based Linux SoC, 802.11bgn WiFi, Ethernet, USB host, and microSD — enabling cloud-connected Arduino sketches and over-the-air programming.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$74.95
- **CPU:** ATmega32U4 @ 16 MHz,Atheros AR9331 MIPS @ 400 MHz
- **RAM:** 2.5 KB (MCU),64 MB DDR2 (Linux)
- **Flash:** 32 KB (MCU),16 MB SPI (Linux)
- **Power:** 5V via Micro USB or PoE (802.3af)
- **Dimensions:** 73 × 53 mm

## Connectivity

WiFi 802.11 b/g/n | Ethernet 10/100 Mbps PoE

## Compatible Firmware

- arduino
- platformio

## Components

- **ATmega32U4** (mcu): 8-bit AVR with native USB at 16 MHz, 32KB flash, 2.5KB SRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=arduino-yun&source=md-export)
- **Atheros AR9331** (soc): MIPS-based SoC at 400 MHz running OpenWrt Linux with integrated 802.11bgn WiFi, 64MB DDR2 RAM, 16MB flash — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.openhacks.com%2FuploadsProductos%2FAR9331_datasheet.pdf&ref=openhardware.directory&product=arduino-yun&source=md-export)

## Protocols

- **UART**: TX=D1, RX=D0
- **SPI**: MOSI=D16, MISO=D14, SCK=D15, SS=D10
- **I2C**: SDA=D2, SCL=D3
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX / INT2 | — | digital-input, digital-output, interrupt |
| D1 | TX / INT3 | — | digital-input, digital-output, interrupt |
| D2 | SDA / INT1 | — | digital-input, digital-output, interrupt |
| D3 | SCL / INT0 / PWM | — | digital-input, digital-output, pwm, interrupt |
| D4 | GPIO / A6 | — | digital-input, digital-output, analog-input |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / A7 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D7 | GPIO / INT6 / BRIDGE_RESET | — | digital-input, digital-output, interrupt |
| D8 | GPIO / A8 | — | digital-input, digital-output, analog-input |
| D9 | GPIO / A9 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D10 | SS / A10 / PWM | — | digital-input, digital-output, pwm |
| D11 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D12 | GPIO / A11 | — | digital-input, digital-output, analog-input |
| D13 | LED / PWM | — | digital-input, digital-output, pwm |
| D14 | MISO | — | digital-input, digital-output |
| D15 | SCK | — | digital-input, digital-output |
| D16 | MOSI | — | digital-input, digital-output |
| A0 | Analog 0 / D18 | — | analog-input, digital-input, digital-output |
| A1 | Analog 1 / D19 | — | analog-input, digital-input, digital-output |
| A2 | Analog 2 / D20 | — | analog-input, digital-input, digital-output |
| A3 | Analog 3 / D21 | — | analog-input, digital-input, digital-output |
| A4 | Analog 4 / D22 | — | analog-input, digital-input, digital-output |
| A5 | Analog 5 / D23 | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB00PGD2CTS&ref=openhardware.directory&product=arduino-yun&source=md-export) — $69.90

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F1498&ref=openhardware.directory&product=arduino-yun&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fretired%2Fboards%2Farduino-yun&ref=openhardware.directory&product=arduino-yun&source=md-export)

## Tags

`arduino`, `atmega32u4`, `linux`, `wifi`, `iot`, `openWrt`, `mips`, `cloud`

---
[View full device page](https://openhardware.directory/s/1370/arduino-yun)

---

# Adafruit Feather RP2040 with RFM95 LoRa 915 MHz

> RP2040 Feather with integrated RFM95W LoRa radio at 915 MHz (SX1276), 8MB flash, up to 20 km range, LiPo charging, STEMMA QT, and uFL antenna connector.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** feather
- **Price:** ~$29.95
- **CPU:** RP2040
- **RAM:** 264 KB
- **Flash:** 8 MB
- **Power:** 5V + LiPo
- **Dimensions:** 50.8 x 22.8 x 7 mm

## Compatible Firmware

- circuitpython
- micropython
- arduino

## Components

- **RP2040** (mcu): Dual-core ARM Cortex-M0+ at 133 MHz, 264KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-rp2040-rfm95&source=md-export)
- **RFM95W** (radio): SX1276-based 868/915 MHz LoRa transceiver, +20 dBm, up to 20 km range, SPI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5714%2FSX1276-7-8.pdf&ref=openhardware.directory&product=adafruit-feather-rp2040-rfm95&source=md-export)

## Protocols

- **I2C**: SDA=GPIO24, SCL=GPIO25
- **SPI**: MOSI=GPIO11, MISO=GPIO12, SCK=GPIO13, CS=GPIO10
- **UART**: TX=GPIO0, RX=GPIO1

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | TX — UART | — | digital-input, digital-output, pwm |
| GPIO1 | RX — UART | — | digital-input, digital-output, pwm |
| GPIO2 | D2 — GPIO | — | digital-input, digital-output, pwm |
| GPIO3 | D3 — GPIO | — | digital-input, digital-output, pwm |
| GPIO4 | D4 — GPIO | — | digital-input, digital-output, pwm |
| GPIO5 | D5 — GPIO | — | digital-input, digital-output, pwm |
| GPIO6 | D6 — RFM95 CS | — | digital-input, digital-output, pwm |
| GPIO7 | D7 — GPIO | — | digital-input, digital-output |
| GPIO8 | D8 — GPIO | — | digital-input, digital-output |
| GPIO9 | D9 — GPIO | — | digital-input, digital-output |
| GPIO10 | RFM95 CS | — | digital-input, digital-output |
| GPIO11 | MOSI — SPI | — | digital-input, digital-output |
| GPIO12 | MISO — SPI | — | digital-input, digital-output |
| GPIO13 | SCK — SPI | — | digital-input, digital-output |
| GPIO14 | RFM95 IRQ | — | digital-input, interrupt |
| GPIO15 | RFM95 RST | — | digital-output |
| GPIO24 | SDA — I2C (STEMMA QT) | — | digital-input, digital-output |
| GPIO25 | SCL — I2C (STEMMA QT) | — | digital-input, digital-output |
| GPIO26 | A0 — ADC0 | — | analog-input, digital-input, digital-output |
| GPIO27 | A1 — ADC1 | — | analog-input, digital-input, digital-output |
| GPIO28 | A2 — ADC2 | — | analog-input, digital-input, digital-output |
| GPIO29 | A3 — ADC3 | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5714&ref=openhardware.directory&product=adafruit-feather-rp2040-rfm95&source=md-export) — 29.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5714&ref=openhardware.directory&product=adafruit-feather-rp2040-rfm95&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5714%2FSX1276-7-8.pdf&ref=openhardware.directory&product=adafruit-feather-rp2040-rfm95&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Ffeather-rp2040-rfm95&ref=openhardware.directory&product=adafruit-feather-rp2040-rfm95&source=md-export)

## Tags

`adafruit`, `feather`, `rp2040`, `lora`, `rfm95`, `sx1276`, `915mhz`, `lorawan`, `circuitpython`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-rp2040-rfm95)

---

# Raspberry Pi Pico 2

> The Raspberry Pi Pico 2 is an RP2350-based microcontroller board with dual ARM Cortex-M33 or RISC-V Hazard3 cores at 150MHz, 520KB SRAM, and 4MB flash. It doubles the RAM and flash of the original Pico while retaining pin compatibility — available with or without pre-soldered headers.

## Quick Facts

- **Brand:** Raspberry Pi
- **Board Type:** rp2350
- **Price:** ~$7
- **CPU:** Dual ARM Cortex-M33 or dual RISC-V Hazard3 @ 150MHz (RP2350)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C (USB 1.1 host/device)
- **Power:** 1.8–5.5V DC
- **Dimensions:** 51mm × 21mm

## Compatible Firmware

- circuitpython
- micropython
- arduino

## Components

- **RP2350** (mcu): Dual-core ARM Cortex-M33 or RISC-V Hazard3 at 150MHz with 520KB SRAM, hardware AES/SHA-256, TRNG, and 12 PIO state machines. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=raspberry-pi-pico-2&source=md-export)

## Protocols

- **I2C**: SDA=GPIO4, SCL=GPIO5
- **SPI**: SCK=GPIO6, MOSI=GPIO7, MISO=GPIO8
- **UART**: TX=GPIO0, RX=GPIO1
- **PWM**
- **PIO**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | TX | — | uart-tx, digital |
| GPIO1 | RX | — | uart-rx, digital |
| GPIO2 | GPIO2 | — | digital |
| GPIO3 | GPIO3 | — | digital |
| GPIO4 | SDA | — | i2c-sda, digital |
| GPIO5 | SCL | — | i2c-scl, digital |
| GPIO6 | SCK | — | spi-sck, digital |
| GPIO7 | MOSI | — | spi-mosi, digital |
| GPIO8 | MISO | — | spi-miso, digital |
| GPIO9 | GPIO9 | — | digital |
| GPIO10 | GPIO10 | — | digital |
| GPIO11 | GPIO11 | — | digital |
| GPIO12 | GPIO12 | — | digital |
| GPIO13 | GPIO13 | — | digital |
| GPIO14 | GPIO14 | — | digital |
| GPIO15 | GPIO15 | — | digital |
| GPIO16 | GPIO16 | — | digital |
| GPIO17 | GPIO17 | — | digital |
| GPIO18 | GPIO18 | — | digital |
| GPIO19 | GPIO19 | — | digital |
| GPIO20 | GPIO20 | — | digital |
| GPIO21 | GPIO21 | — | digital |
| GPIO22 | GPIO22 | — | digital |
| GPIO26 | ADC0 | — | analog, digital |
| GPIO27 | ADC1 | — | analog, digital |
| GPIO28 | ADC2 | — | analog, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit (without header)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5526&ref=openhardware.directory&product=raspberry-pi-pico-2&source=md-export) — $7.00
- [Adafruit (with header)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6328&ref=openhardware.directory&product=raspberry-pi-pico-2&source=md-export) — $7.50

## Available Software

- [Raspberry Pi Pico SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fraspberrypi%2Fpico-sdk&ref=openhardware.directory&product=raspberry-pi-pico-2&source=md-export)
- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fraspberry_pi_pico2%2F&ref=openhardware.directory&product=raspberry-pi-pico-2&source=md-export)
- [MicroPython](https://openhardware.directory/r?to=https%3A%2F%2Fmicropython.org%2Fdownload%2FRPI_PICO2%2F&ref=openhardware.directory&product=raspberry-pi-pico-2&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fproducts%2Fraspberry-pi-pico-2%2F&ref=openhardware.directory&product=raspberry-pi-pico-2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fraspberrypi%2Fpico-sdk&ref=openhardware.directory&product=raspberry-pi-pico-2&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=raspberry-pi-pico-2&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fpico%2FRPi-Pico-R3-PUBLIC-20200119.pdf&ref=openhardware.directory&product=raspberry-pi-pico-2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fdocumentation%2Fmicrocontrollers%2Fpico-series.html&ref=openhardware.directory&product=raspberry-pi-pico-2&source=md-export)

## Tags

`raspberry-pi`, `pico`, `rp2350`, `microcontroller`, `risc-v`, `cortex-m33`, `circuitpython`, `micropython`

## Certifications

CE, FCC, RoHS

---
[View full device page](https://openhardware.directory/s/1370/raspberry-pi-pico-2)

---

# Netduino 3 WiFi

> The Netduino 3 WiFi is a .NET Micro Framework development board with an STM32F427 ARM Cortex-M4 at 168MHz, integrated WiFi with WPA2/SSL support, Arduino shield compatibility, and 3 GOBUS expansion ports for rapid IoT prototyping in C#.

## Quick Facts

- **Brand:** Netduino
- **Board Type:** dev-board
- **Price:** ~$69.95
- **CPU:** STM32F427 ARM Cortex-M4 @ 168MHz
- **RAM:** 164+ KB
- **Flash:** 1408 KB
- **Power:** 7.5–12V DC or USB
- **Dimensions:** 80.3mm × 53.6mm × 12.3mm

## Connectivity

WiFi 802.11 b/g/n (WPA2 + SSL/TLS 1.2)

## Compatible Firmware

- dotnet-micro-framework

## Components

- **STM32F427VI** (mcu): ST Microelectronics STM32F427VI ARM Cortex-M4F at 168MHz with FPU, 1408KB flash, 164KB+ RAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F2486%2F2486.pdf&ref=openhardware.directory&product=netduino-3-wifi&source=md-export)

## Protocols

- **I2C**: SDA=A4, SCL=A5
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, CS=D10
- **UART**: TX=D1, RX=D0
- **PWM**
- **GOBUS**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | D0 | — | GPIO, UART RX |
| D1 | D1 | — | GPIO, UART TX |
| D2 | D2 | — | GPIO |
| D3 | D3 | — | GPIO, PWM |
| D4 | D4 | — | GPIO |
| D5 | D5 | — | GPIO, PWM |
| D6 | D6 | — | GPIO, PWM |
| D7 | D7 | — | GPIO |
| D8 | D8 | — | GPIO |
| D9 | D9 | — | GPIO, PWM |
| D10 | D10 | — | GPIO, SPI CS |
| D11 | D11 | — | GPIO, SPI MOSI |
| D12 | D12 | — | GPIO, SPI MISO |
| D13 | D13 | — | GPIO, SPI CLK |
| A0 | A0 | — | GPIO, ADC |
| A1 | A1 | — | GPIO, ADC |
| A2 | A2 | — | GPIO, ADC |
| A3 | A3 | — | GPIO, ADC |
| A4 | A4 | — | GPIO, ADC, I2C SDA |
| A5 | A5 | — | GPIO, ADC, I2C SCL |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2486&ref=openhardware.directory&product=netduino-3-wifi&source=md-export) — $69.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2486&ref=openhardware.directory&product=netduino-3-wifi&source=md-export)
- [docs](https://openhardware.directory/r?to=http%3A%2F%2Fforums.netduino.com%2F&ref=openhardware.directory&product=netduino-3-wifi&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F2486%2Fnetduino3wifi_schematic.pdf&ref=openhardware.directory&product=netduino-3-wifi&source=md-export)

## Tags

`netduino`, `dotnet`, `wifi`, `wpa2`, `arduino-compatible`, `cortex-m4`, `csharp`, `microsd`

---
[View full device page](https://openhardware.directory/s/1370/netduino-3-wifi)

---

# Adafruit Feather M0 RFM69HCW 868/915 MHz

> ATSAMD21G18 ARM Cortex-M0+ Feather board with RFM69HCW sub-GHz radio at 868/915 MHz. Up to +20 dBm TX power, AES-128 encryption, 256KB flash, 32KB RAM, native USB, and built-in LiPo charger.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$24.95
- **CPU:** ATSAMD21G18 ARM Cortex-M0+ @ 48 MHz
- **RAM:** 32KB SRAM
- **Flash:** 256KB
- **Power:** 5V + LiPo
- **Dimensions:** 51 × 23 × 8 mm

## Compatible Firmware

- arduino
- circuitpython

## Components

- **ATSAMD21G18** (mcu): ARM Cortex-M0+ at 48MHz, 256KB flash, 32KB SRAM, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fimages%2Fproduct-files%2F2772%2Fatmel-42181-sam-d21_datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw-868-915&source=md-export)
- **RFM69HCW** (sub-ghz-radio): HopeRF RFM69HCW 868/915MHz radio module based on SX1231, +13 to +20 dBm TX, AES-128, FSK/OOK modulation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3076%2FRFM69HCW-V1.1.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw-868-915&source=md-export)

## Protocols

- **SPI**: MOSI=PA16, MISO=PA19, SCK=PA17
- **I2C**: SDA=PA22, SCL=PA23
- **UART**: TX=PA10, RX=PA11
- **RFM69 packet radio**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA11 | RX — UART Receive | — | digital-input, digital-output |
| PA10 | TX — UART Transmit | — | digital-input, digital-output |
| PA15 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA20 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA07 | D9 — GPIO / PWM / Analog | — | digital-input, digital-output, pwm, analog-input |
| PA18 | D10 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA16 | D11 — SPI MOSI | — | digital-input, digital-output |
| PA19 | D12 — SPI MISO | — | digital-input, digital-output |
| PA17 | D13 — SPI SCK / LED | — | digital-input, digital-output |
| PA22 | SDA — I2C Data | — | digital-input, digital-output |
| PA23 | SCL — I2C Clock | — | digital-input, digital-output |
| PA02 | A0 — Analog In / DAC Out | — | analog-input, analog-output |
| PB08 | A1 — Analog In | — | analog-input |
| PB09 | A2 — Analog In | — | analog-input |
| PA04 | A3 — Analog In | — | analog-input |
| PA05 | A4 — Analog In | — | analog-input |
| PB02 | A5 — Analog In | — | analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3176&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw-868-915&source=md-export) — 24.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3176&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw-868-915&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-M0-RFM-LoRa-PCB&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw-868-915&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-m0-radio-with-rfm69-packet-radio%2Foverview&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw-868-915&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3076%2FRFM69HCW-V1.1.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw-868-915&source=md-export)

## Tags

`feather`, `rfm69`, `sub-ghz`, `868mhz`, `915mhz`, `atsamd21`, `arm-cortex-m0`, `iot`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-m0-rfm69hcw-868-915)

---

# Adafruit Feather 32u4 Adalogger

> Feather-format ATmega32u4 data logger at 8 MHz, 3.3V with onboard microSD slot, LiPo charging, native USB, 20 GPIO, and 100mA charger — built for portable data logging applications.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$21.95
- **CPU:** ATmega32u4 @ 8 MHz
- **RAM:** 2 KB
- **Flash:** 32 KB
- **Power:** 3.7V LiPo via JST or 5V Micro USB
- **Dimensions:** 51 × 23 mm

## Compatible Firmware

- arduino
- platformio

## Components

- **ATmega32u4** (mcu): 8-bit AVR with native USB at 8 MHz, 32KB flash, 2KB SRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-adalogger&source=md-export)
- **MCP73831** (charger): Microchip MCP73831 100mA LiPo charge management IC — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F20001984g.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-adalogger&source=md-export)

## Protocols

- **UART**: TX=D1, RX=D0
- **SPI**: MOSI=D16, MISO=D14, SCK=D15, SS=D10, SD_CS=D4
- **I2C**: SDA=D2, SCL=D3
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX / INT2 | — | digital-input, digital-output, interrupt |
| D1 | TX / INT3 | — | digital-input, digital-output, interrupt |
| D2 | SDA / INT1 | — | digital-input, digital-output, interrupt |
| D3 | SCL / INT0 / PWM | — | digital-input, digital-output, pwm, interrupt |
| D4 | SD_CS / A6 | — | digital-input, digital-output, analog-input |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / A7 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D7 | GPIO / INT6 | — | digital-input, digital-output, interrupt |
| D8 | LED_GREEN | — | digital-output |
| D9 | BATT / A9 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D10 | SS / A10 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D11 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D12 | GPIO / A11 | — | digital-input, digital-output, analog-input |
| D13 | LED / PWM | — | digital-input, digital-output, pwm |
| D14 | MISO | — | digital-input, digital-output |
| D15 | SCK | — | digital-input, digital-output |
| D16 | MOSI | — | digital-input, digital-output |
| A0 | Analog 0 / D18 | — | analog-input, digital-input, digital-output |
| A1 | Analog 1 / D19 | — | analog-input, digital-input, digital-output |
| A2 | Analog 2 / D20 | — | analog-input, digital-input, digital-output |
| A3 | Analog 3 / D21 | — | analog-input, digital-input, digital-output |
| A4 | Analog 4 / D22 | — | analog-input, digital-input, digital-output |
| A5 | Analog 5 / D23 | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2795&ref=openhardware.directory&product=adafruit-feather-32u4-adalogger&source=md-export) — 21.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2795&ref=openhardware.directory&product=adafruit-feather-32u4-adalogger&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-32u4-adalogger&ref=openhardware.directory&product=adafruit-feather-32u4-adalogger&source=md-export)

## Tags

`feather`, `atmega32u4`, `data-logging`, `microsd`, `lipo`, `adafruit`, `adalogger`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-32u4-adalogger)

---

# Adafruit Feather M0 Adalogger

> Feather-format ATSAMD21 ARM Cortex-M0+ data logger at 48 MHz, 3.3V with microSD slot, 256KB flash, 32KB RAM, LiPo charging, native USB, and 12-bit ADC — 32-bit power for field data collection.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$19.95
- **CPU:** ATSAMD21G18 ARM Cortex-M0+ @ 48 MHz
- **RAM:** 32 KB
- **Flash:** 256 KB
- **Power:** 3.7V LiPo via JST or 5V Micro USB
- **Dimensions:** 51 × 23 mm

## Compatible Firmware

- arduino
- circuitpython
- platformio

## Components

- **ATSAMD21G18** (mcu): Microchip ARM Cortex-M0+ at 48 MHz, 256KB flash, 32KB RAM, native USB, 12-bit ADC/DAC — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D21_DA1_Family_DataSheet_DS40001882H.pdf&ref=openhardware.directory&product=adafruit-feather-m0-adalogger&source=md-export)
- **MCP73831** (charger): Microchip MCP73831 100mA LiPo charge management IC — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F20001984g.pdf&ref=openhardware.directory&product=adafruit-feather-m0-adalogger&source=md-export)

## Protocols

- **UART**: TX=D1, RX=D0
- **SPI**: MOSI=D23, MISO=D22, SCK=D24, SS=D10, SD_CS=D4
- **I2C**: SDA=D20, SCL=D21
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX | — | digital-input, digital-output |
| D1 | TX | — | digital-input, digital-output |
| D4 | SD_CS | — | digital-input, digital-output |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D7 | GPIO / INT | — | digital-input, digital-output, interrupt |
| D8 | LED_GREEN / PWM | — | digital-input, digital-output, pwm |
| D9 | BATT / A7 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D10 | SS / PWM | — | digital-input, digital-output, pwm |
| D11 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D12 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D13 | LED / PWM | — | digital-input, digital-output, pwm |
| D20 | SDA (PA22) | — | digital-input, digital-output |
| D21 | SCL (PA23) | — | digital-input, digital-output |
| D22 | MISO (PA14) | — | digital-input, digital-output |
| D23 | MOSI (PA12) | — | digital-input, digital-output |
| D24 | SCK (PA13) | — | digital-input, digital-output |
| A0 | DAC / Analog 0 | — | analog-input, analog-output, digital-input, digital-output |
| A1 | Analog 1 | — | analog-input, digital-input, digital-output |
| A2 | Analog 2 | — | analog-input, digital-input, digital-output |
| A3 | Analog 3 | — | analog-input, digital-input, digital-output |
| A4 | Analog 4 | — | analog-input, digital-input, digital-output |
| A5 | Analog 5 | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2796&ref=openhardware.directory&product=adafruit-feather-m0-adalogger&source=md-export) — 19.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2796&ref=openhardware.directory&product=adafruit-feather-m0-adalogger&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-m0-adalogger&ref=openhardware.directory&product=adafruit-feather-m0-adalogger&source=md-export)

## Tags

`feather`, `atsamd21`, `arm`, `cortex-m0`, `data-logging`, `microsd`, `circuitpython`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-m0-adalogger)

---

# Raspberry Pi CM4 IO Board

> Official reference carrier board for the Raspberry Pi Compute Module 4. Exposes dual HDMI 2.0, Gigabit Ethernet, 2× USB 2.0, PCIe x1, dual camera/display FPC, microSD slot (for CM4 Lite), RTC, HAT headers, and barrel-jack power.

## Quick Facts

- **Brand:** Raspberry Pi
- **Board Type:** dev-board
- **Price:** ~$35
- **CPU:** none (no onboard MCU; requires CM4 module)
- **RAM:** N/A (provided by CM4)
- **Flash:** N/A (provided by CM4)
- **Power:** +12V barrel jack or +5V (external)

## Connectivity

WiFi false (provided by CM4 module if WiFi variant) | Bluetooth false (provided by CM4 module if WiFi variant) | Zigbee false | Ethernet Gigabit Ethernet (RJ45, PoE-capable with HAT)

## Compatible Firmware

- raspberry-pi-os
- ubuntu
- home-assistant-os

## Components

- **CM4 Module Connector** (io-expander): Dual 100-pin Hirose DF40 board-to-board connectors accepting Raspberry Pi Compute Module 4. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F4787%2F4787_cm4io-datasheet.pdf&ref=openhardware.directory&product=raspberry-pi-cm4-io-board&source=md-export)

## Protocols

- **I2C**: SDA=GPIO2, SCL=GPIO3
- **SPI**: MOSI=GPIO10, MISO=GPIO9, SCK=GPIO11, CE0=GPIO8, CE1=GPIO7
- **UART**: TX=GPIO14, RX=GPIO15
- **I2S**: CLK=GPIO18, FS=GPIO19, DIN=GPIO20, DOUT=GPIO21
- **GPIO**
- **PCIe**
- **USB**
- **HDMI**
- **CSI**
- **DSI**
- **Ethernet**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | SDA1 — I2C1 Data (physical pin 3) | — | i2c, digital-input, digital-output |
| GPIO3 | SCL1 — I2C1 Clock (physical pin 5) | — | i2c, digital-input, digital-output |
| GPIO4 | GPIO4 — General Purpose (physical pin 7) | — | digital-input, digital-output |
| GPIO5 | GPIO5 — General Purpose (physical pin 29) | — | digital-input, digital-output |
| GPIO6 | GPIO6 — General Purpose (physical pin 31) | — | digital-input, digital-output |
| GPIO7 | CE1 — SPI0 Chip Enable 1 (physical pin 26) | — | spi, digital-input, digital-output |
| GPIO8 | CE0 — SPI0 Chip Enable 0 (physical pin 24) | — | spi, digital-input, digital-output |
| GPIO9 | MISO — SPI0 MISO (physical pin 21) | — | spi, digital-input, digital-output |
| GPIO10 | MOSI — SPI0 MOSI (physical pin 19) | — | spi, digital-input, digital-output |
| GPIO11 | SCK — SPI0 Clock (physical pin 23) | — | spi, digital-input, digital-output |
| GPIO12 | PWM0 — Hardware PWM (physical pin 32) | — | digital-input, digital-output, pwm |
| GPIO13 | PWM1 — Hardware PWM (physical pin 33) | — | digital-input, digital-output, pwm |
| GPIO14 | UART0 TX — UART Transmit (physical pin 8) | — | uart, digital-input, digital-output |
| GPIO15 | UART0 RX — UART Receive (physical pin 10) | — | uart, digital-input, digital-output |
| GPIO17 | GPIO17 — General Purpose (physical pin 11) | — | digital-input, digital-output |
| GPIO18 | GPIO18 — PCM CLK / PWM0 (physical pin 12) | — | digital-input, digital-output, pwm |
| GPIO19 | GPIO19 — PCM FS / PWM1 (physical pin 35) | — | digital-input, digital-output, pwm |
| GPIO20 | GPIO20 — PCM DIN (physical pin 38) | — | digital-input, digital-output |
| GPIO21 | GPIO21 — PCM DOUT (physical pin 40) | — | digital-input, digital-output |
| GPIO22 | GPIO22 — General Purpose (physical pin 15) | — | digital-input, digital-output |
| GPIO23 | GPIO23 — General Purpose (physical pin 16) | — | digital-input, digital-output |
| GPIO24 | GPIO24 — General Purpose (physical pin 18) | — | digital-input, digital-output |
| GPIO25 | GPIO25 — General Purpose (physical pin 22) | — | digital-input, digital-output |
| GPIO26 | GPIO26 — General Purpose (physical pin 37) | — | digital-input, digital-output |
| GPIO27 | GPIO27 — General Purpose (physical pin 13) | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4787&ref=openhardware.directory&product=raspberry-pi-cm4-io-board&source=md-export) — 35

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4787&ref=openhardware.directory&product=raspberry-pi-cm4-io-board&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4787&ref=openhardware.directory&product=raspberry-pi-cm4-io-board&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fproducts%2Fcompute-module-4%2F%3FresellerType%3Dhome&ref=openhardware.directory&product=raspberry-pi-cm4-io-board&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F4787%2F4787_cm4io-datasheet.pdf&ref=openhardware.directory&product=raspberry-pi-cm4-io-board&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fraspberrypi&ref=openhardware.directory&product=raspberry-pi-cm4-io-board&source=md-export)

## Tags

`raspberry-pi`, `cm4`, `io-board`, `carrier-board`, `pcie`, `hdmi`, `gigabit-ethernet`, `hat`

## Certifications

RoHS, CE

---
[View full device page](https://openhardware.directory/s/1370/raspberry-pi-cm4-io-board)

---

# Arduino MKR WiFi 1010

> Compact IoT Arduino with SAMD21 Cortex-M0+ @ 48MHz, u-blox NINA-W102 WiFi + Bluetooth module, ATECC508 crypto chip, 256KB Flash, 32KB SRAM, USB full-speed, LiPo charging, and MKR shield compatibility.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** microcontroller-board
- **Price:** ~$31.95
- **CPU:** ARM Cortex-M0+ @ 48MHz (SAMD21G18)
- **RAM:** 32KB SRAM
- **Flash:** 256KB Flash
- **Power:** 5V via Micro-USB or 3.7V LiPo battery
- **Dimensions:** 61.5 x 25mm

## Connectivity

WiFi 802.11 b/g/n (u-blox NINA-W102) | Bluetooth Bluetooth 4.2 + BLE (u-blox NINA-W102) | Zigbee false | Ethernet false

## Compatible Firmware

- arduino

## Components

- **SAMD21G18** (mcu): Microchip SAMD21G18 ARM Cortex-M0+ @ 48MHz, 256KB Flash, 32KB SRAM, USB full-speed. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcontent.arduino.cc%2Fassets%2Fmkr-microchip_samd21_family_full_datasheet-ds40001882d.pdf&ref=openhardware.directory&product=arduino-mkr-wifi-1010&source=md-export)
- **NINA-W102** (radio): u-blox NINA-W102 802.11 b/g/n WiFi + Bluetooth 4.2 + BLE combo module. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcontent.arduino.cc%2Fassets%2FArduino_NINA-W10_DataSheet_%2528UBX-17065507%2529.pdf&ref=openhardware.directory&product=arduino-mkr-wifi-1010&source=md-export)
- **ATECC508** (mcu): Microchip ATECC508A hardware cryptographic accelerator for secure key storage and TLS. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcontent.arduino.cc%2Fassets%2Fmkr-microchip_atecc508a_cryptoauthentication_device_summary_datasheet-20005927a.pdf&ref=openhardware.directory&product=arduino-mkr-wifi-1010&source=md-export)

## Protocols

- **I2C**: SDA=D2, SCL=D3
- **SPI**: MOSI=D6, MISO=D4, SCK=D7, CS=D5
- **UART**: TX=D14, RX=D13
- **USB**
- **WiFi**
- **BLE**
- **PWM**
- **ADC**
- **DAC**: DAC=A0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA02 | A0/DAC | — | ADC, DAC, GPIO |
| PB02 | A1 | — | ADC, GPIO |
| PB03 | A2 | — | ADC, GPIO |
| PA04 | A3 | — | ADC, GPIO |
| PA05 | A4 | — | ADC, GPIO |
| PA06 | A5 | — | ADC, GPIO |
| PA07 | A6 | — | ADC, GPIO |
| PA22 | D0/RX13 | — | UART, GPIO, PWM |
| PA23 | D1/TX14 | — | UART, GPIO, PWM |
| PA10 | D2/SDA | — | I2C, GPIO, PWM |
| PA11 | D3/SCL | — | I2C, GPIO, PWM |
| PB10 | D4/MISO | — | SPI, GPIO, PWM |
| PB11 | D5/CS | — | SPI, GPIO, PWM |
| PA20 | D6/MOSI | — | SPI, GPIO, PWM |
| PA21 | D7/SCK | — | SPI, GPIO, PWM |
| PA16 | D8/PWM | — | PWM, GPIO |
| PA17 | D9/PWM | — | PWM, GPIO |
| PA19 | D10/PWM | — | PWM, GPIO |
| PA08 | D11/PWM | — | PWM, GPIO |
| PA09 | D12/PWM/IRQ | — | PWM, GPIO |
| PB23 | D13/RX | — | UART, GPIO, PWM |
| PB22 | D14/TX | — | UART, GPIO, PWM |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4805&ref=openhardware.directory&product=arduino-mkr-wifi-1010&source=md-export) — 31.95
- [Arduino Store](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Farduino-mkr-wifi-1010&ref=openhardware.directory&product=arduino-mkr-wifi-1010&source=md-export) — 34.99

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4805&ref=openhardware.directory&product=arduino-mkr-wifi-1010&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4805&ref=openhardware.directory&product=arduino-mkr-wifi-1010&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fwww.arduino.cc%2Fen%2FGuide%2FMKRWiFi1010&ref=openhardware.directory&product=arduino-mkr-wifi-1010&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Farduino-libraries%2FWiFiNINA&ref=openhardware.directory&product=arduino-mkr-wifi-1010&source=md-export)

## Tags

`arduino`, `mkr`, `wifi`, `bluetooth`, `samd21`, `iot`, `crypto`, `lipo`, `ble`

## Certifications

RoHS, FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/arduino-mkr-wifi-1010)

---

# Adafruit Feather 32u4 RFM69HCW (868/915 MHz)

> Feather-format development board combining the ATmega32u4 microcontroller with an RFM69HCW 868/915 MHz packet radio for low-power sub-GHz wireless applications.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$24.95
- **CPU:** AVR ATmega32u4 @ 8MHz
- **RAM:** 2KB SRAM
- **Flash:** 32KB
- **Power:** 3.7V LiPo via JST or 5V Micro-USB
- **Dimensions:** 51.0 × 22.8 × 8mm

## Compatible Firmware

- arduino
- platformio

## Components


## Protocols

- **I2C**: SDA=D2, SCL=D3
- **SPI**: MOSI=D16, MISO=D14, SCK=D15, CS=D10
- **UART**: TX=D1, RX=D0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX — UART Receive | — | digital-input, digital-output |
| D1 | TX — UART Transmit | — | digital-input, digital-output |
| D2 | SDA — I2C Data | — | digital-input, digital-output |
| D3 | SCL — I2C Clock | — | digital-input, digital-output, pwm |
| D4 | Radio RST | — | digital-input, digital-output |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D7 | Radio IRQ | — | digital-input |
| D8 | Radio CS | — | digital-input, digital-output |
| D9 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D10 | SPI CS / PWM | — | digital-input, digital-output, pwm |
| D11 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D13 | LED / PWM | — | digital-input, digital-output, pwm |
| D14 | MISO — SPI | — | digital-input, digital-output |
| D15 | SCK — SPI Clock | — | digital-input, digital-output |
| D16 | MOSI — SPI | — | digital-input, digital-output |
| A0 | Analog Input 0 (D18) | — | digital-input, digital-output, analog-input |
| A1 | Analog Input 1 (D19) | — | digital-input, digital-output, analog-input |
| A2 | Analog Input 2 (D20) | — | digital-input, digital-output, analog-input |
| A3 | Analog Input 3 (D21) | — | digital-input, digital-output, analog-input |
| A4 | Analog Input 4 (D22) | — | digital-input, digital-output, analog-input |
| A5 | Analog Input 5 (D23) | — | digital-input, digital-output, analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3076&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-32u4-radio-with-rfm69hcw-module&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-32u4-Radio-PCB&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-32u4-rfm69hcw)

---

# Adafruit Feather 32u4 RFM96 LoRa (433 MHz)

> Feather-format development board combining the ATmega32u4 microcontroller with an RFM96 LoRa 433 MHz transceiver for long-range, low-power IoT applications.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$34.95
- **CPU:** AVR ATmega32u4 @ 8MHz
- **RAM:** 2KB SRAM
- **Flash:** 32KB
- **Power:** 3.7V LiPo via JST or 5V Micro-USB
- **Dimensions:** 51.0 × 22.8 × 8mm

## Compatible Firmware

- arduino
- platformio

## Components


## Protocols

- **I2C**: SDA=D2, SCL=D3
- **SPI**: MOSI=D16, MISO=D14, SCK=D15, CS=D10
- **UART**: TX=D1, RX=D0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX — UART Receive | — | digital-input, digital-output |
| D1 | TX — UART Transmit | — | digital-input, digital-output |
| D2 | SDA — I2C Data | — | digital-input, digital-output |
| D3 | SCL — I2C Clock | — | digital-input, digital-output, pwm |
| D4 | Radio RST | — | digital-input, digital-output |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D7 | Radio IRQ | — | digital-input |
| D8 | Radio CS | — | digital-input, digital-output |
| D9 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D10 | SPI CS / PWM | — | digital-input, digital-output, pwm |
| D11 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D13 | LED / PWM | — | digital-input, digital-output, pwm |
| D14 | MISO — SPI | — | digital-input, digital-output |
| D15 | SCK — SPI Clock | — | digital-input, digital-output |
| D16 | MOSI — SPI | — | digital-input, digital-output |
| A0 | Analog Input 0 (D18) | — | digital-input, digital-output, analog-input |
| A1 | Analog Input 1 (D19) | — | digital-input, digital-output, analog-input |
| A2 | Analog Input 2 (D20) | — | digital-input, digital-output, analog-input |
| A3 | Analog Input 3 (D21) | — | digital-input, digital-output, analog-input |
| A4 | Analog Input 4 (D22) | — | digital-input, digital-output, analog-input |
| A5 | Analog Input 5 (D23) | — | digital-input, digital-output, analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3077&ref=openhardware.directory&product=adafruit-feather-32u4-rfm96&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-32u4-radio-with-rfm69hcw-module&ref=openhardware.directory&product=adafruit-feather-32u4-rfm96&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-32u4-Radio-PCB&ref=openhardware.directory&product=adafruit-feather-32u4-rfm96&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-32u4-rfm96)

---

# Adafruit Feather 32u4 RFM95 LoRa (900 MHz)

> Feather-format development board combining the ATmega32u4 microcontroller with an RFM95 LoRa 868/915 MHz transceiver for long-range, low-power IoT applications.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$34.95
- **CPU:** AVR ATmega32u4 @ 8MHz
- **RAM:** 2KB SRAM
- **Flash:** 32KB
- **Power:** 3.7V LiPo via JST or 5V Micro-USB
- **Dimensions:** 51.0 × 22.8 × 8mm

## Compatible Firmware

- arduino
- platformio

## Components


## Protocols

- **I2C**: SDA=D2, SCL=D3
- **SPI**: MOSI=D16, MISO=D14, SCK=D15, CS=D10
- **UART**: TX=D1, RX=D0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX — UART Receive | — | digital-input, digital-output |
| D1 | TX — UART Transmit | — | digital-input, digital-output |
| D2 | SDA — I2C Data | — | digital-input, digital-output |
| D3 | SCL — I2C Clock | — | digital-input, digital-output, pwm |
| D4 | Radio RST | — | digital-input, digital-output |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D7 | Radio IRQ | — | digital-input |
| D8 | Radio CS | — | digital-input, digital-output |
| D9 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D10 | SPI CS / PWM | — | digital-input, digital-output, pwm |
| D11 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D13 | LED / PWM | — | digital-input, digital-output, pwm |
| D14 | MISO — SPI | — | digital-input, digital-output |
| D15 | SCK — SPI Clock | — | digital-input, digital-output |
| D16 | MOSI — SPI | — | digital-input, digital-output |
| A0 | Analog Input 0 (D18) | — | digital-input, digital-output, analog-input |
| A1 | Analog Input 1 (D19) | — | digital-input, digital-output, analog-input |
| A2 | Analog Input 2 (D20) | — | digital-input, digital-output, analog-input |
| A3 | Analog Input 3 (D21) | — | digital-input, digital-output, analog-input |
| A4 | Analog Input 4 (D22) | — | digital-input, digital-output, analog-input |
| A5 | Analog Input 5 (D23) | — | digital-input, digital-output, analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3178&ref=openhardware.directory&product=adafruit-feather-32u4-rfm95&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-32u4-radio-with-rfm69hcw-module&ref=openhardware.directory&product=adafruit-feather-32u4-rfm95&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-32u4-Radio-PCB&ref=openhardware.directory&product=adafruit-feather-32u4-rfm95&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-32u4-rfm95)

---

# Adafruit Feather M0 RFM69HCW Packet Radio (868/915 MHz)

> ATSAMD21G18 ARM Cortex-M0+ Feather board with RFM69HCW sub-GHz radio at 868/915 MHz. Up to +20 dBm TX power, AES-128 encryption, 256KB flash, 32KB RAM, native USB, and built-in LiPo charger.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$29.95
- **CPU:** ATSAMD21G18 ARM Cortex-M0+ @ 48 MHz
- **RAM:** 32KB SRAM
- **Flash:** 256KB
- **Power:** 5V + LiPo
- **Dimensions:** 51 × 23 × 8 mm

## Compatible Firmware

- arduino
- platformio

## Components

- **ATSAMD21G18** (mcu): ARM Cortex-M0+ at 48MHz, 256KB flash, 32KB SRAM, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D21_DA1_Family_DataSheet_DS40001882F.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw&source=md-export)
- **RFM69HCW** (sub-ghz-radio): HopeRF RFM69HCW 868/915MHz radio module based on SX1231, +13 to +20 dBm TX, AES-128, FSK/OOK modulation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3076%2FRFM69HCW-V1.1.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw&source=md-export)

## Protocols

- **SPI**: MOSI=PA16, MISO=PA19, SCK=PA17
- **I2C**: SDA=PA22, SCL=PA23
- **UART**: TX=PA10, RX=PA11
- **RFM69 packet radio**: CS=PA06, RST=PA08, IRQ=PA09

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA02 | A0 — Analog In / DAC Out | — | analog-input, analog-output |
| PA05 | A1 — Analog In | — | analog-input |
| PB08 | A2 — Analog In | — | analog-input |
| PB09 | A3 — Analog In | — | analog-input |
| PA04 | A4 — Analog In | — | analog-input |
| PB02 | A5 — Analog In | — | analog-input |
| PA11 | RX — UART Receive | — | digital-input, digital-output |
| PA10 | TX — UART Transmit | — | digital-input, digital-output |
| PA09 | D3 — Radio IRQ | — | digital-input, digital-output, pwm |
| PA08 | D4 — Radio RST | — | digital-input, digital-output, pwm |
| PA15 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA20 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA06 | D8 — Radio CS | — | digital-input, digital-output |
| PA07 | D9 — GPIO / PWM / Analog | — | digital-input, digital-output, pwm, analog-input |
| PA18 | D10 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA16 | D11 — SPI MOSI | — | digital-input, digital-output |
| PA19 | D12 — SPI MISO | — | digital-input, digital-output |
| PA17 | D13 — SPI SCK / LED | — | digital-input, digital-output |
| PA22 | SDA — I2C Data | — | digital-input, digital-output |
| PA23 | SCL — I2C Clock | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3176&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw&source=md-export) — 29.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3176&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-M0-Radio-PCB&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-m0-radio-with-rfm69-packet-radio%2Foverview&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3076%2FRFM69HCW-V1.1.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm69hcw&source=md-export)

## Tags

`feather`, `samd21`, `rfm69`, `packet-radio`, `868mhz`, `915mhz`, `sub-ghz`, `adafruit`, `cortex-m0`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-m0-rfm69hcw)

---

# Adafruit Feather M0 RFM96 LoRa Radio (433 MHz)

> ATSAMD21G18 ARM Cortex-M0+ Feather board with RFM96 LoRa radio at 433 MHz. Spread-spectrum modulation for long-range links, 256KB flash, 32KB RAM, native USB, and built-in LiPo charger.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$34.95
- **CPU:** ATSAMD21G18 ARM Cortex-M0+ @ 48 MHz
- **RAM:** 32KB SRAM
- **Flash:** 256KB
- **Power:** 5V + LiPo
- **Dimensions:** 51 × 23 × 8 mm

## Compatible Firmware

- arduino
- platformio

## Components

- **ATSAMD21G18** (mcu): ARM Cortex-M0+ at 48MHz, 256KB flash, 32KB SRAM, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D21_DA1_Family_DataSheet_DS40001882F.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm96&source=md-export)
- **RFM96** (lora-radio): HopeRF RFM96 LoRa 433MHz transceiver based on Semtech SX1276, configurable SF7-SF12, up to +20 dBm TX. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3179%2Fsx1276_77_78_79.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm96&source=md-export)

## Protocols

- **SPI**: MOSI=PA16, MISO=PA19, SCK=PA17
- **I2C**: SDA=PA22, SCL=PA23
- **UART**: TX=PA10, RX=PA11
- **RFM96 LoRa radio**: CS=PA06, RST=PA08, IRQ=PA09

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA02 | A0 — Analog In / DAC Out | — | analog-input, analog-output |
| PA05 | A1 — Analog In | — | analog-input |
| PB08 | A2 — Analog In | — | analog-input |
| PB09 | A3 — Analog In | — | analog-input |
| PA04 | A4 — Analog In | — | analog-input |
| PB02 | A5 — Analog In | — | analog-input |
| PA11 | RX — UART Receive | — | digital-input, digital-output |
| PA10 | TX — UART Transmit | — | digital-input, digital-output |
| PA09 | D3 — Radio IRQ | — | digital-input, digital-output, pwm |
| PA08 | D4 — Radio RST | — | digital-input, digital-output, pwm |
| PA15 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA20 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA06 | D8 — Radio CS | — | digital-input, digital-output |
| PA07 | D9 — GPIO / PWM / Analog | — | digital-input, digital-output, pwm, analog-input |
| PA18 | D10 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA16 | D11 — SPI MOSI | — | digital-input, digital-output |
| PA19 | D12 — SPI MISO | — | digital-input, digital-output |
| PA17 | D13 — SPI SCK / LED | — | digital-input, digital-output |
| PA22 | SDA — I2C Data | — | digital-input, digital-output |
| PA23 | SCL — I2C Clock | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3179&ref=openhardware.directory&product=adafruit-feather-m0-rfm96&source=md-export) — 34.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3179&ref=openhardware.directory&product=adafruit-feather-m0-rfm96&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-M0-RFM-LoRa-PCB&ref=openhardware.directory&product=adafruit-feather-m0-rfm96&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-m0-radio-with-lora-radio-module%2Foverview&ref=openhardware.directory&product=adafruit-feather-m0-rfm96&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3179%2Fsx1276_77_78_79.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm96&source=md-export)

## Tags

`feather`, `samd21`, `rfm96`, `lora`, `433mhz`, `lpwan`, `adafruit`, `cortex-m0`, `sx1276`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-m0-rfm96)

---

# Adafruit Feather M0 RFM95 LoRa Radio (868/915 MHz)

> ATSAMD21G18 ARM Cortex-M0+ Feather board with RFM95 LoRa radio at 868/915 MHz. Spread-spectrum LoRa modulation for multi-kilometre range, 256KB flash, 32KB RAM, native USB, and built-in LiPo charger.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$34.95
- **CPU:** ATSAMD21G18 ARM Cortex-M0+ @ 48 MHz
- **RAM:** 32KB SRAM
- **Flash:** 256KB
- **Power:** 5V + LiPo
- **Dimensions:** 51 × 23 × 8 mm

## Compatible Firmware

- arduino
- platformio

## Components

- **ATSAMD21G18** (mcu): ARM Cortex-M0+ at 48MHz, 256KB flash, 32KB SRAM, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM_D21_DA1_Family_DataSheet_DS40001882F.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm95&source=md-export)
- **RFM95** (lora-radio): HopeRF RFM95 LoRa 868/915MHz transceiver based on Semtech SX1276, SF7-SF12, up to +20 dBm TX, LoRaWAN compatible. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3179%2Fsx1276_77_78_79.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm95&source=md-export)

## Protocols

- **SPI**: MOSI=PA16, MISO=PA19, SCK=PA17
- **I2C**: SDA=PA22, SCL=PA23
- **UART**: TX=PA10, RX=PA11
- **RFM95 LoRa radio**: CS=PA06, RST=PA08, IRQ=PA09

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA02 | A0 — Analog In / DAC Out | — | analog-input, analog-output |
| PA05 | A1 — Analog In | — | analog-input |
| PB08 | A2 — Analog In | — | analog-input |
| PB09 | A3 — Analog In | — | analog-input |
| PA04 | A4 — Analog In | — | analog-input |
| PB02 | A5 — Analog In | — | analog-input |
| PA11 | RX — UART Receive | — | digital-input, digital-output |
| PA10 | TX — UART Transmit | — | digital-input, digital-output |
| PA09 | D3 — Radio IRQ | — | digital-input, digital-output, pwm |
| PA08 | D4 — Radio RST | — | digital-input, digital-output, pwm |
| PA15 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA20 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA06 | D8 — Radio CS | — | digital-input, digital-output |
| PA07 | D9 — GPIO / PWM / Analog | — | digital-input, digital-output, pwm, analog-input |
| PA18 | D10 — GPIO / PWM | — | digital-input, digital-output, pwm |
| PA16 | D11 — SPI MOSI | — | digital-input, digital-output |
| PA19 | D12 — SPI MISO | — | digital-input, digital-output |
| PA17 | D13 — SPI SCK / LED | — | digital-input, digital-output |
| PA22 | SDA — I2C Data | — | digital-input, digital-output |
| PA23 | SCL — I2C Clock | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3178&ref=openhardware.directory&product=adafruit-feather-m0-rfm95&source=md-export) — 34.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3178&ref=openhardware.directory&product=adafruit-feather-m0-rfm95&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-M0-RFM-LoRa-PCB&ref=openhardware.directory&product=adafruit-feather-m0-rfm95&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-m0-radio-with-lora-radio-module%2Foverview&ref=openhardware.directory&product=adafruit-feather-m0-rfm95&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3179%2Fsx1276_77_78_79.pdf&ref=openhardware.directory&product=adafruit-feather-m0-rfm95&source=md-export)

## Tags

`feather`, `samd21`, `rfm95`, `lora`, `lorawan`, `868mhz`, `915mhz`, `lpwan`, `adafruit`, `cortex-m0`, `sx1276`, `ttn`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-m0-rfm95)

---

# Heltec Sufficient IoT Hub

> Linux-based IoT hub with Allwinner T113-S3 dual-core ARM Cortex-A7 SoC, LoRa (SX1262), WiFi, Ethernet, and optional LTE. Runs Debian 10 with a dedicated IoT OS, CLI, and web UI for no-code device management.

## Quick Facts

- **Brand:** Heltec
- **Board Type:** SBC
- **Price:** ~$33.9
- **CPU:** Allwinner T113-S3
- **RAM:** 128 MB DDR3
- **Flash:** SD 3.0 (8GB/16GB)
- **USB:** USB Type-C Host
- **Power:** 5V USB-C (~150mA active)
- **Dimensions:** 90 x 41 x 11 mm

## Connectivity

WiFi 802.11b/g/n | Ethernet 10/100 Mbps

## Compatible Firmware

- Debian 10 (Linux 5.4.61)
- Sufficient IoT OS

## Components

- **Allwinner T113-S3** (SoC): Application processor with dual ARM Cortex-A7 cores at 1GHz, 32KB L1 cache per core, 256KB L2 cache. Designed for embedded Linux applications. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flinux-sunxi.org%2FT113-S3&ref=openhardware.directory&product=heltec-sufficient-iot-hub&source=md-export)
- **Semtech SX1262** (LoRa Radio): Sub-GHz LoRa transceiver supporting 150MHz to 960MHz frequency range with up to +22dBm output power and -148dBm sensitivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=heltec-sufficient-iot-hub&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **PWM**
- **ADC**
- **UART**
- **MQTT**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Available Software

- [Sufficient IoT OS](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FSufficient-IoT-Application&ref=openhardware.directory&product=heltec-sufficient-iot-hub&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fsufficient-iot-hub%2F&ref=openhardware.directory&product=heltec-sufficient-iot-hub&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.org%2Fen%2Fnode%2Fsufficient_iot_hub%2Findex.html&ref=openhardware.directory&product=heltec-sufficient-iot-hub&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FSufficient-IoT-Application&ref=openhardware.directory&product=heltec-sufficient-iot-hub&source=md-export)
- [downloads](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2F&ref=openhardware.directory&product=heltec-sufficient-iot-hub&source=md-export)

## Tags

`iot-hub`, `linux`, `lora`, `gateway`, `allwinner`, `arm-cortex-a7`, `mqtt`, `no-code`

## Certifications

CE, RoHS

---
[View full device page](https://openhardware.directory/s/1370/heltec-sufficient-iot-hub)

---

# Heltec Wireless Shell V3

> Ultra-compact ESP32-S3 + SX1262 LoRa module with stamp-hole design for direct PCB integration, supporting WiFi, BLE 5, and LoRa at 470-928MHz with deep sleep current under 10uA.

## Quick Facts

- **Brand:** Heltec Automation
- **Board Type:** module
- **Price:** ~$11.9
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, vector instructions
- **RAM:** 512KB SRAM
- **Flash:** 8MB (QSPI)
- **USB:** USB Type-C
- **Power:** 5V via USB-C or 3.3V direct
- **Dimensions:** 38.4 × 16.1 × 2.8mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0, Bluetooth Mesh

## Components

- **ESP32-S3FN8** (mcu): Xtensa LX7 dual-core processor at 240MHz with 512KB SRAM, 8MB integrated flash, WiFi 802.11 b/g/n and Bluetooth 5 LE. Features hardware crypto acceleration (AES/SHA/RSA), ULP co-processor, and 45 programmable GPIOs. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export)
- **SX1262** (radio): Semtech SX1262 long-range, low-power sub-GHz RF transceiver supporting LoRa and FSK modulation in the 150-960MHz band. Features +22dBm TX power, -139dBm RX sensitivity, and 4.2mA active receive current. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F6%2Fb%2F5%2F1%2F4%2FSX1262_datasheet.pdf&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export)

## Protocols

- **SPI** (SPI0 (LoRa)): SS=GPIO8, SCK=GPIO9, MOSI=GPIO10, MISO=GPIO11
- **I2C** (I2C0): SDA=GPIO41, SCL=GPIO42
- **UART** (UART0): TX=GPIO43, RX=GPIO44
- **PWM**
- **ADC**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | General Purpose I/O | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO2 | General Purpose I/O | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO4 | General Purpose I/O | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO5 | General Purpose I/O | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO6 | General Purpose I/O | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO7 | General Purpose I/O | — | digital-input, digital-output, adc, touch, pwm, rtc |
| GPIO8 | SPI SS (LoRa SX1262) | — | digital-input, digital-output, pwm |
| GPIO9 | SPI SCK (LoRa SX1262) | — | digital-input, digital-output, pwm |
| GPIO10 | SPI MOSI (LoRa SX1262) | — | digital-input, digital-output, pwm |
| GPIO11 | SPI MISO (LoRa SX1262) | — | digital-input, digital-output, pwm |
| GPIO12 | LoRa RST | — | digital-input, digital-output, pwm |
| GPIO13 | LoRa BUSY | — | digital-input, digital-output, pwm |
| GPIO14 | LoRa DIO1 (IRQ) | — | digital-input, digital-output, pwm |
| GPIO19 | General Purpose I/O | — | digital-input, digital-output, adc, pwm |
| GPIO20 | General Purpose I/O | — | digital-input, digital-output, adc, pwm |
| GPIO41 | I2C SDA | — | digital-input, digital-output, pwm |
| GPIO42 | I2C SCL | — | digital-input, digital-output, pwm |
| GPIO43 | UART TX / USB Serial | — | digital-input, digital-output, pwm |
| GPIO44 | UART RX / USB Serial | — | digital-input, digital-output, pwm |
| GPIO47 | General Purpose I/O | — | digital-input, digital-output, pwm |
| GPIO48 | LED / General Purpose I/O | — | digital-input, digital-output, pwm |

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwireless-shell-v3%2F&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export) — 11.90
- [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2F1005005214621307.html&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export) — 11.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fwireless-shell-v3%2F&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltec_ESP32&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.org%2Fen%2Fnode%2Fesp32%2Fwireless_shell%2Findex.html&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Shell_V3%2FHTIT-Wsh_V3%28Rev1.1%29.pdf&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FWireless_Shell_V3%2FHTIT-Wsh_V3_Schematic_Diagram.pdf&ref=openhardware.directory&product=heltec-wireless-shell-v3&source=md-export)

## Tags

`esp32-s3`, `lora`, `sx1262`, `meshtastic`, `lorawan`, `ble`, `wifi`, `mesh`, `iot-module`, `stamp-hole`

## Certifications

CE

---
[View full device page](https://openhardware.directory/s/1370/heltec-wireless-shell-v3)

---

# Heltec HRI-485X

> Industrial RS-485 wireless converter with ESP32, LoRa SX1262, Ethernet, and ESPHome support. Converts RS-485/Modbus serial data to LoRa, LoRaWAN, LTE, or Ethernet for long-range industrial IoT communication. DIN rail mountable with IP65 protection and 4.5-28V wide voltage input.

## Quick Facts

- **Brand:** Heltec Automation
- **Board Type:** DTU
- **Price:** ~$17.9
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** No
- **Power:** 7-28V DC
- **Dimensions:** 120 × 70 × 32mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 4.2, BLE | Ethernet 10/100 Mbps

## Components

- **ESP32-D0WDQ6** (mcu): Xtensa LX6 dual-core processor at 240MHz with 520KB SRAM, 4MB flash, WiFi 802.11 b/g/n and Bluetooth 4.2/BLE. Provides the main processing, Ethernet MAC, and wireless connectivity for the converter. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=heltec-hri-485x&source=md-export)
- **SX1262** (radio): Semtech SX1262 long-range, low-power sub-GHz RF transceiver supporting LoRa and FSK modulation in the 150-960MHz ISM bands. Provides +22dBm TX power with -134dBm receiving sensitivity for multi-kilometer range. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=heltec-hri-485x&source=md-export)
- **RTL8201** (ethernet-phy): Realtek RTL8201 single-chip 10/100Mbps Fast Ethernet PHYceiver connected via RMII interface, providing wired LAN connectivity for local configuration and data forwarding. — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Frealtek.info%2Fpdf%2Frtl8201.pdf&ref=openhardware.directory&product=heltec-hri-485x&source=md-export)
- **MAX3485** (rs485-transceiver): Maxim MAX3485 half-duplex RS-485/RS-422 transceiver operating at 3.3V with up to 10Mbps data rate. Power-controlled via GPIO16 for energy-efficient RS-485 bus communication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fen%2Fproducts%2Fmax3485.html&ref=openhardware.directory&product=heltec-hri-485x&source=md-export)

## Protocols

- **UART** (UART0): TX=GPIO33, RX=GPIO37
- **Ethernet (RMII)**: MDC=GPIO23, MDIO=GPIO18, CLK=GPIO17
- **Modbus RTU**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | HA Online LED | — | digital-output |
| GPIO3 | Status LED | — | digital-output |
| GPIO16 | MAX3485 Power Control | — | digital-output |
| GPIO17 | Ethernet RMII CLK | — | digital-output |
| GPIO18 | Ethernet MDIO | — | digital-input, digital-output |
| GPIO23 | Ethernet MDC | — | digital-output |
| GPIO33 | UART TX (RS-485) | — | digital-output |
| GPIO37 | UART RX (RS-485) | — | digital-input |

## Where to Buy

- [Heltec Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhri-485x%2F&ref=openhardware.directory&product=heltec-hri-485x&source=md-export) — $17.90
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-Wireless-Converter-Reliable-HRI-4851-915MHz%2Fdp%2FB0DB27G4Z6&ref=openhardware.directory&product=heltec-hri-485x&source=md-export) — $27.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhri-485x%2F&ref=openhardware.directory&product=heltec-hri-485x&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.org%2Fen%2Fready_to_use%2Fhri-485x%2Findex.html&ref=openhardware.directory&product=heltec-hri-485x&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHRI-485X%2FHRI-485x.pdf&ref=openhardware.directory&product=heltec-hri-485x&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation&ref=openhardware.directory&product=heltec-hri-485x&source=md-export)

## Tags

`rs485`, `lora`, `modbus`, `industrial`, `iot-gateway`, `esphome`, `ethernet`, `din-rail`, `esp32`

---
[View full device page](https://openhardware.directory/s/1370/heltec-hri-485x)

---

# BigTreeTech MMB CAN V2.0 Multi-Material Control Board

> CAN bus control board for the Enraged Rabbit Carrot Feeder (ERCF) multi-material system. Features STM32G0B1 MCU, 4 EZ stepper driver slots, USB/CAN connectivity, and full Klipper support.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Expansion Board
- **Price:** ~$32.89
- **CPU:** STM32G0B1CBT6
- **RAM:** 144KB
- **Flash:** 128KB
- **USB:** USB Type-C
- **Power:** DC 12V-24V 9A
- **Dimensions:** 125x54mm

## Compatible Firmware

- Klipper

## Components

- **4x EZ Driver Slot** (stepper-driver): 4 EZ-format stepper driver slots supporting EZ2209, EZ5160, etc. in STEP/DIR, UART, or SPI mode — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FTMC2209_datasheet_rev1.09.pdf&ref=openhardware.directory&product=bigtreetech-mmb-can-v2-0-multi-material-control-board&source=md-export)
- **WS2812 RGB** (led): Onboard WS2812B NeoPixel RGB LED output (PC3) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=bigtreetech-mmb-can-v2-0-multi-material-control-board&source=md-export)
- **Endstop Inputs** (sensor): Multiple endstop and Hall sensor inputs for filament presence detection — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FMMB%2Fblob%2Fmaster%2FFirmware%2Fsample-bigtreetech-mmb-canbus-v2.0.cfg&ref=openhardware.directory&product=bigtreetech-mmb-can-v2-0-multi-material-control-board&source=md-export)
- **I2C Expansion Port** (connector): I2C bus (i2c3_PC0_PC1) for AHT10 temperature/humidity sensor or DIY expansion — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FMMB%2Fblob%2Fmaster%2FFirmware%2Fsample-bigtreetech-mmb-canbus-v2.0.cfg&ref=openhardware.directory&product=bigtreetech-mmb-can-v2-0-multi-material-control-board&source=md-export)

## Protocols

- **CAN Bus**
- **USB**
- **UART**
- **SPI**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-mmb&ref=openhardware.directory&product=bigtreetech-mmb-can-v2-0-multi-material-control-board&source=md-export) — $32.89

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FMMB&ref=openhardware.directory&product=bigtreetech-mmb-can-v2-0-multi-material-control-board&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-mmb&ref=openhardware.directory&product=bigtreetech-mmb-can-v2-0-multi-material-control-board&source=md-export)

## Tags

`can-bus`, `expansion-board`, `klipper`, `3d-printing`, `stm32`, `ercf`, `multi-material`, `bigtreetech`, `mmb`, `ez-driver`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-mmb-can-v2-0-multi-material-control-board)

---

# BigTreeTech Panda Branch V1.0

> USB power expansion board for Bambu Lab X1/P1/A1 series printers. Provides 4x USB-A 5V outputs at up to 2.7A peak from a 24V input, with overcurrent protection and MX3.0 AMS power interfaces.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** power-module
- **Price:** ~$18.99
- **CPU:** None (passive power distribution board)
- **RAM:** No
- **Flash:** No
- **USB:** 4× USB-A 5V output
- **Power:** DC 24V input via MX3.0 connector
- **Dimensions:** 145 × 20mm

## Components

- **USB-A Power Outputs** (connector): Four USB-A output ports providing 5V power for accessories, each with individual overcurrent fuse protection — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FPanda-Branch&ref=openhardware.directory&product=bigtreetech-panda-branch-v1-0&source=md-export)
- **MX3.0 AMS Interface** (connector): MX3.0 2-pin by 2 interface for AMS and AMS Lite power supply connections — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FPanda-Branch&ref=openhardware.directory&product=bigtreetech-panda-branch-v1-0&source=md-export)

## Protocols

- **USB 2.0 Power Delivery**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-panda-branch&ref=openhardware.directory&product=bigtreetech-panda-branch-v1-0&source=md-export) — $18.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FPanda-Branch&ref=openhardware.directory&product=bigtreetech-panda-branch-v1-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-panda-branch&ref=openhardware.directory&product=bigtreetech-panda-branch-v1-0&source=md-export)

## Tags

`usb-hub`, `power-expansion`, `bambu-lab`, `3d-printer`, `bigtreetech`, `open-source`, `panda-series`, `24v-to-5v`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-panda-branch-v1-0)

---

# LILYGO Module17 Revision 0.1E

> STM32-based M17 digital amateur radio modem board with DE-9 connector — implements the open-source M17 protocol for digital voice and data over amateur radio, compatible with OpenRTX firmware.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$32.36
- **CPU:** STM32
- **RAM:** 20KB SRAM
- **Flash:** 128KB
- **USB:** USB (CH9102 driver)
- **Power:** 5V

## Compatible Firmware

- arduino

## Components

- **STM32** (mcu): STMicroelectronics STM32 ARM Cortex-M microcontroller implementing the M17 digital radio modem protocol. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fen%2Fmicrocontrollers-microprocessors%2Fstm32-32-bit-arm-cortex-mcus.html&ref=openhardware.directory&product=lilygo-module17-rev-0-1e&source=md-export)
- **DE-9 Connector** (interface): DE-9 (DB9) serial connector for interfacing with amateur radio transceivers at configurable baud rate. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Fmodule17-revision-0-1e&ref=openhardware.directory&product=lilygo-module17-rev-0-1e&source=md-export)
- **CH9102** (interface): CH9102 USB to serial bridge chip for programming and PC communication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH9102.html&ref=openhardware.directory&product=lilygo-module17-rev-0-1e&source=md-export)

## Protocols

- **UART**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Fmodule17-revision-0-1e&ref=openhardware.directory&product=lilygo-module17-rev-0-1e&source=md-export) — $32.36

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Fmodule17-revision-0-1e&ref=openhardware.directory&product=lilygo-module17-rev-0-1e&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO&ref=openhardware.directory&product=lilygo-module17-rev-0-1e&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-module17-rev-0-1e&source=md-export)

## Tags

`stm32`, `m17`, `amateur-radio`, `openrtx`, `digital-radio`, `lilygo`, `modem`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-module17-rev-0-1e)

---

# iCESugar-Pro FPGA Development Board

> Open-source Lattice ECP5 FPGA dev board with 24K LUTs, 32MB SDRAM, 32MB SPI flash, 106 GPIO pins in DDR SODIMM form factor. Supports fully open-source toolchain (Yosys + Nextpnr) and RISC-V Linux.

## Quick Facts

- **Brand:** MuseLab
- **Board Type:** FPGA
- **Price:** ~$60
- **CPU:** Lattice ECP5 LFE5U-25F (24K LUT FPGA)
- **RAM:** 32MB SDRAM
- **Flash:** 32MB SPI
- **GPIO:** 106 pins
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet false

## Components

- **LFE5U-25F-6BG256C** (fpga): Lattice Semiconductor ECP5 FPGA with 24K LUTs, 1008Kb embedded memory, 28 DSP multipliers, 1 PLL, in BGA-256 package. Fully supported by open-source Yosys + Nextpnr toolchain. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwuxx%2Ficesugar-pro%2Fblob%2Fmaster%2Fdoc%2FFPGA-DS-02012-1-9-ECP5-ECP5G-Family-Data-Sheet-1022822.pdf&ref=openhardware.directory&product=icesugar-pro&source=md-export)
- **IS42S16160B** (memory): ISSI IS42S16160B 256Mbit (32MB) synchronous DRAM with 16-bit data bus, suitable for frame buffers and running Linux on soft-core RISC-V processors. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwuxx%2Ficesugar-pro%2Fblob%2Fmaster%2Fdoc%2FIS42S16160B.pdf&ref=openhardware.directory&product=icesugar-pro&source=md-export)
- **W25Q256JV** (flash-memory): Winbond W25Q256JV 256Mbit (32MB) SPI NOR flash memory with dual/quad SPI support and up to 133MHz clock for FPGA bitstream and firmware storage. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwuxx%2Ficesugar-pro%2Fblob%2Fmaster%2Fdoc%2Fw25q256jv.pdf&ref=openhardware.directory&product=icesugar-pro&source=md-export)
- **APM32F1 (iCELink)** (debugger): Geehy APM32F1 ARM Cortex-M3 MCU running ARM Mbed DAPLink firmware. Provides drag-and-drop bitstream programming via virtual USB drive, USB CDC serial port directly connected to FPGA, and dual JTAG interfaces (native ECP5 + GPIO-based for custom SoC). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.geehy.com%2Fapm32%3Fid%3D13&ref=openhardware.directory&product=icesugar-pro&source=md-export)

## Protocols

- **SPI**
- **SDIO**
- **JTAG**
- **UART**
- **USB CDC**
- **GPIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fjohnnywu%2Ficesugar-pro-fpga-development-board%2F&ref=openhardware.directory&product=icesugar-pro&source=md-export) — $60.00

## Available Software

- [Yosys](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FYosysHQ%2Fyosys&ref=openhardware.directory&product=icesugar-pro&source=md-export)
- [Nextpnr](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FYosysHQ%2Fnextpnr&ref=openhardware.directory&product=icesugar-pro&source=md-export)
- [Project Trellis](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fenjoy-digital%2Flitex&ref=openhardware.directory&product=icesugar-pro&source=md-export)
- [LiteX](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fenjoy-digital%2Flitex&ref=openhardware.directory&product=icesugar-pro&source=md-export)
- [icesprog](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwuxx%2Ficesugar-pro&ref=openhardware.directory&product=icesugar-pro&source=md-export)
- [oss-cad-suite](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FYosysHQ%2Foss-cad-suite-build&ref=openhardware.directory&product=icesugar-pro&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fjohnnywu%2Ficesugar-pro-fpga-development-board%2F&ref=openhardware.directory&product=icesugar-pro&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwuxx%2Ficesugar-pro&ref=openhardware.directory&product=icesugar-pro&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwuxx%2Ficesugar-pro%2Fblob%2Fmaster%2Fdoc%2FFPGA-DS-02012-1-9-ECP5-ECP5G-Family-Data-Sheet-1022822.pdf&ref=openhardware.directory&product=icesugar-pro&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwuxx%2Ficesugar-pro%2Ftree%2Fmaster%2Fschematic&ref=openhardware.directory&product=icesugar-pro&source=md-export)

## Tags

`fpga`, `lattice-ecp5`, `open-source`, `risc-v`, `yosys`, `nextpnr`, `sodimm`, `icesugar`, `muselab`, `litex`, `icelink`, `verilog`

---
[View full device page](https://openhardware.directory/s/1370/icesugar-pro)

---

# GY-521 MPU-6050 6-Axis IMU Module

> 6-axis inertial measurement unit combining a 3-axis accelerometer (±2/4/8/16g) and 3-axis gyroscope (±250-2000°/s) with onboard DMP. I2C interface, 3.3V/5V.

## Quick Facts

- **Brand:** Generic
- **Board Type:** sensor-module
- **Price:** ~$8.5
- **CPU:** None (passive sensor module, connects to host MCU)
- **RAM:** None
- **Flash:** none
- **Power:** 3.3V–5V via pin header

## Components

- **InvenSense MPU-6050**: Combined 3-axis accelerometer, 3-axis gyroscope, and Digital Motion Processor (DMP) in a QFN package — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fwp-content%2Fuploads%2F2015%2F02%2FMPU-6000-Datasheet1.pdf&ref=openhardware.directory&product=gy-521-mpu-6050&source=md-export)

## Protocols

- **undefined**

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fgy-521-mpu-6050&ref=openhardware.directory&product=gy-521-mpu-6050&source=md-export) — $8.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fgy-521-mpu-6050&ref=openhardware.directory&product=gy-521-mpu-6050&source=md-export)

## Tags

`mpu-6050`, `imu`, `accelerometer`, `gyroscope`, `6-axis`, `i2c`, `motion-sensor`, `invensense`

---
[View full device page](https://openhardware.directory/s/1370/gy-521-mpu-6050)

---

# Waveshare LuckFox Lyra Pi

> A compact Linux development board based on the Rockchip RK3506 with triple-core Cortex-A7 + Cortex-M0, 512MB DDR3L, dual Ethernet with PoE, optional Wi-Fi 6 and 4G LTE, and a 40-pin GPIO header.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** sbc
- **Price:** ~$23.99
- **CPU:** Rockchip RK3506 Cortex-A7
- **RAM:** 512MB DDR3L
- **Flash:** 8GB eMMC (Version A)
- **GPIO:** 28 pins
- **USB:** 1x USB-C OTG 2.0,3x USB HOST 2.0
- **Power:** USB-C

## Connectivity

WiFi Wi-Fi 6 (optional) | Bluetooth BLE 5.2 (optional) | Ethernet Dual 10/100M

## Compatible Firmware

- linux
- buildroot

## Protocols

- **I2C**
- **SPI**
- **UART**
- **CAN**
- **PWM**
- **MIPI DSI**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fluckfox-lyra-pi.htm&ref=openhardware.directory&product=waveshare-luckfox-lyra-pi&source=md-export) — $23.99
- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwaveshare-luckfox-lyra-pi-linux-board&ref=openhardware.directory&product=waveshare-luckfox-lyra-pi&source=md-export) — €86.27

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fluckfox-lyra-pi.htm&ref=openhardware.directory&product=waveshare-luckfox-lyra-pi&source=md-export)

## Tags

`waveshare`, `luckfox`, `rockchip`, `rk3506`, `linux`, `cortex-a7`, `poe`, `iot-gateway`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-luckfox-lyra-pi)

---

# Gnat LoRa+GNSS Asset Tracker

> Ultra-small (20x20mm), ultra-low-power LoRa/LoRaWAN + concurrent GNSS asset tracker by Tlera Corp, built on the Murata CMWX1ZZABZ-078 module with STM32L082 MCU, SX1276 LoRa radio, u-blox MAX-M8Q GNSS, and LIS2DW12 accelerometer.

## Quick Facts

- **Brand:** Tlera Corp
- **Board Type:** asset-tracker
- **Price:** ~$79.95
- **CPU:** ARM Cortex-M0+ @ 32MHz, AES-128/256 hardware crypto
- **RAM:** 20KB SRAM
- **Flash:** 192KB
- **Power:** 3.6-5.5V via Molex PicoBlade / 1S LiPo battery
- **Dimensions:** 20 × 20mm

## Compatible Firmware

- arduino
- rust-embedded

## Components

- **CMWX1ZZABZ-078** (module): Murata Type ABZ module integrating STM32L082 ARM Cortex-M0+ MCU and Semtech SX1276 LoRa transceiver in a 12.5 x 11.6mm package, supporting all major LoRaWAN frequency bands. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.murata.com%2Fproducts%2Fproductdata%2F8822549676062%2FTYPEABZ.pdf&ref=openhardware.directory&product=gnat-loragnss-asset-tracker&source=md-export)
- **STM32L082** (mcu): ST ultra-low-power MCU with 192KB flash, 20KB SRAM, AES-128/256 hardware crypto engine, and deep-sleep current under 1µA. Runs at up to 32MHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32l082cz.pdf&ref=openhardware.directory&product=gnat-loragnss-asset-tracker&source=md-export)
- **SX1276** (radio): Semtech SX1276 LoRa transceiver supporting FSK, GFSK, and LoRa modulation across 868/915MHz bands with up to +20dBm output power and -148dBm sensitivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.my.salesforce.com%2Fsfc%2Fp%2FE0000000JelG%2Fa%2F2R000000HT76%2F7Nka9W5WgugoZe.xwIHJy6ebj1hW8B.YJlQBKkLWygo&ref=openhardware.directory&product=gnat-loragnss-asset-tracker&source=md-export)
- **MAX-M8Q** (gps): u-blox MAX-M8Q concurrent GNSS receiver supporting GPS, GLONASS, Galileo, and BeiDou simultaneously with -167dBm navigation sensitivity and PPS output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.u-blox.com%2Fen%2Fproduct%2Fmax-m8-series&ref=openhardware.directory&product=gnat-loragnss-asset-tracker&source=md-export)
- **LIS2DW12** (accelerometer): ST LIS2DW12 ultra-low-power MEMS accelerometer with ±2g/±4g/±8g/±16g selectable ranges, wake-on-motion interrupts, and 1.5µA current in low-power mode for motion detection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flis2dw12.pdf&ref=openhardware.directory&product=gnat-loragnss-asset-tracker&source=md-export)
- **TPS7A02** (voltage-regulator): Texas Instruments TPS7A02 LDO voltage regulator with only 25nA quiescent current, providing dedicated 3.1V supply for the MAX-M8Q GNSS receiver. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FTPS7A02&ref=openhardware.directory&product=gnat-loragnss-asset-tracker&source=md-export)

## Protocols

- **I2C**: SDA=D15, SCL=D14
- **UART** (UART1): RX=D0, TX=D1
- **UART** (UART2): RX=A2, TX=A3
- **SWD**: SWDIO=D8, SWDCLK=D9

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX1 (MAX M8Q) | — | digital-input |
| D1 | UART TX1 (MAX M8Q) | — | digital-output |
| D2 | User Button / Battery Monitor Enable | — | digital-input, digital-output |
| D3 | LIS2DW12 INT2 | — | digital-input |
| D4 | GNSS PPS Output | — | digital-input |
| D5 | GNSS VDD Enable | — | digital-output |
| D8 | SWDIO | — | digital-input, digital-output |
| D9 | SWDCLK | — | digital-output |
| D10 | Blue LED (active LOW) | — | digital-output, pwm |
| D14 | I2C SCL | — | digital-input, digital-output |
| D15 | I2C SDA | — | digital-input, digital-output |
| A0 | GNSS RTC Backup Enable | — | digital-output, adc |
| A1 | Battery Voltage Monitor | — | adc, digital-input |
| A2 | UART RX2 / ADC | — | digital-input, digital-output, adc, pwm |
| A3 | UART TX2 / ADC | — | digital-input, digital-output, adc, pwm |
| A4 | LIS2DW12 INT1 (Wake from STANDBY) | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Ftleracorp%2Fgnat-loragnss-asset-tracker%2F&ref=openhardware.directory&product=gnat-loragnss-asset-tracker&source=md-export) — $79.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Ftleracorp%2Fgnat-loragnss-asset-tracker%2F&ref=openhardware.directory&product=gnat-loragnss-asset-tracker&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fkriswiner%2FCMWX1ZZABZ%2Ftree%2Fmaster%2FGnat&ref=openhardware.directory&product=gnat-loragnss-asset-tracker&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fhackaday.io%2Fproject%2F35169-hackable-cmwx1zzabz-lora-devices&ref=openhardware.directory&product=gnat-loragnss-asset-tracker&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.murata.com%2Fproducts%2Fproductdata%2F8822549676062%2FTYPEABZ.pdf&ref=openhardware.directory&product=gnat-loragnss-asset-tracker&source=md-export)

## Tags

`lora`, `lorawan`, `gnss`, `gps`, `asset-tracker`, `stm32`, `ultra-low-power`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/gnat-loragnss-asset-tracker)

---

# makerdiary nRF52840-MDK USB Dongle

> Open-source multi-protocol wireless USB dongle based on the Nordic nRF52840 SoC. Supports BLE 5.4, Thread, Zigbee, 802.15.4, NFC, and USB 2.0 with UF2 drag-and-drop bootloader. Priced at $12.99.

## Quick Facts

- **Brand:** makerdiary
- **Board Type:** nRF52840
- **Price:** ~$12.99
- **CPU:** ARM Cortex-M4F @ 64MHz, FPU, DSP, CryptoCell-310 (RSA, ECC, SHA-256, AES)
- **RAM:** 256 KB SRAM
- **Flash:** 1 MB
- **USB:** USB-A 2.0 Full-Speed
- **Power:** 5V
- **Dimensions:** 42 × 17.78 × 3.75 mm

## Connectivity

Bluetooth Bluetooth 5.4 BLE + Mesh | Zigbee Zigbee 3.0

## Compatible Firmware

- Zephyr RTOS
- nRF Connect SDK
- OpenSK
- circuitpython
- micropython
- TinyGo

## Components

- **nRF52840** (MCU): ARM Cortex-M4F @ 64MHz with 256KB RAM, 1MB flash, BLE 5.4, Thread, Zigbee, 802.15.4, ANT, NFC-A, USB 2.0, and hardware crypto (RSA, ECC, AES, SHA-256). Deep sleep 0.3µA. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.nordicsemi.com%2Fbundle%2Fps_nrf52840%2Fresource%2FnRF52840_PS_v1.7.pdf&ref=openhardware.directory&product=makerdiary-nrf52840-mdk-usb-dongle&source=md-export)
- **2.4 GHz Chip Antenna** (Antenna): Integrated PCB chip antenna for 2.4 GHz wireless protocols (BLE, Thread, Zigbee, 802.15.4) with +8 dBm TX power — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.nordicsemi.com%2Fbundle%2Fps_nrf52840%2Fresource%2FnRF52840_PS_v1.7.pdf&ref=openhardware.directory&product=makerdiary-nrf52840-mdk-usb-dongle&source=md-export)
- **RGB LED** (LED): User-programmable RGB LED for status indication, connected to P0.22 (green), P0.23 (red), P0.24 (blue), active-low — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.makerdiary.com%2Fnrf52840-mdk-usb-dongle%2Fhardware%2F&ref=openhardware.directory&product=makerdiary-nrf52840-mdk-usb-dongle&source=md-export)

## Protocols

- **UART**: TX=P0.20, RX=P0.19
- **I2C**: SDA=P0.05, SCL=P0.04
- **SPI**
- **USB**: D+=integrated, D-=integrated
- **SWD**: SWDCLK=edge, SWDIO=edge
- **NFC**: NFC1=P0.09, NFC2=P0.10
- **IEEE 802.15.4**
- **BLE**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| P0.04 | I2C SCL (default) | — | digital-input, digital-output, adc |
| P0.05 | I2C SDA (default) | — | digital-input, digital-output, adc |
| P0.09 | NFC1 (shared) | — | — |
| P0.10 | NFC2 (shared) | — | — |
| P0.18 | User/Reset Button | — | digital-input |
| P0.19 | UART RX (default) | — | digital-input, digital-output |
| P0.20 | UART TX (default) | — | digital-input, digital-output |
| P0.22 | RGB LED Green | — | digital-output, pwm |
| P0.23 | RGB LED Red | — | digital-output, pwm |
| P0.24 | RGB LED Blue | — | digital-output, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** Apache-2.0

## Where to Buy

- [makerdiary Store](https://openhardware.directory/r?to=https%3A%2F%2Fmakerdiary.com%2Fproducts%2Fnrf52840-mdk-usb-dongle&ref=openhardware.directory&product=makerdiary-nrf52840-mdk-usb-dongle&source=md-export) — $12.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.makerdiary.com%2Fnrf52840-mdk-usb-dongle%2F&ref=openhardware.directory&product=makerdiary-nrf52840-mdk-usb-dongle&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fmakerdiary%2Fnrf52840-mdk-usb-dongle&ref=openhardware.directory&product=makerdiary-nrf52840-mdk-usb-dongle&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.makerdiary.com%2Fnrf52840-mdk-usb-dongle%2Fassets%2Fattachments%2Fnrf52840-mdk-usb-dongle-schematic-v1.1.pdf&ref=openhardware.directory&product=makerdiary-nrf52840-mdk-usb-dongle&source=md-export)

## Tags

`nrf52840`, `wireless`, `bluetooth`, `thread`, `zigbee`, `usb-dongle`, `open-hardware`, `zephyr`, `packet-sniffer`, `nfc`

---
[View full device page](https://openhardware.directory/s/1370/makerdiary-nrf52840-mdk-usb-dongle)

---

# nice!nano v2 Wireless Keyboard Controller

> Pro Micro drop-in replacement wireless keyboard controller built on the nRF52840 with BLE 5.0, onboard LiPo charger, mid-mount USB-C, and UF2 bootloader. The most popular controller for ZMK wireless split keyboards at $25.

## Quick Facts

- **Brand:** Nice Keyboards
- **Board Type:** nRF52840
- **Price:** ~$25
- **CPU:** ARM Cortex-M4F @ 64MHz, FPU, DSP, CryptoCell-310
- **RAM:** 256 KB SRAM
- **Flash:** 1 MB
- **USB:** USB-C (mid-mount)
- **Power:** 5V + LiPo

## Connectivity

Bluetooth Bluetooth 5.0 BLE

## Compatible Firmware

- ZMK
- BlueMicro_BLE
- Zephyr RTOS

## Components

- **nRF52840** (MCU): ARM Cortex-M4F @ 64MHz with 256KB RAM, 1MB flash, BLE 5.0, USB 2.0, hardware crypto, and 0.3µA deep sleep for ultra-low-power wireless keyboard operation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.nordicsemi.com%2Fbundle%2FnRF52840_PS_v1.9%2Fresource%2FnRF52840_PS_v1.9.pdf&ref=openhardware.directory&product=nice-nano-v2-wireless-keyboard-controller&source=md-export)
- **LiPo Charger** (Battery Charger): Onboard 4.2V lithium battery charger with jumper-selectable 100mA or 500mA charge rate for wireless keyboard battery management — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fnicekeyboards.com%2Fdocs%2Fnice-nano%2Fpinout-schematic%2F&ref=openhardware.directory&product=nice-nano-v2-wireless-keyboard-controller&source=md-export)

## Protocols

- **BLE**
- **USB**: D+=integrated, D-=integrated
- **SPI**
- **I2C**
- **UART**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| P0.04 | Battery Voltage ADC (reserved) | — | adc |
| P0.13 | VCC Power Control | — | digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Nice Keyboards](https://openhardware.directory/r?to=https%3A%2F%2Fnicekeyboards.com%2Fnice-nano%2F&ref=openhardware.directory&product=nice-nano-v2-wireless-keyboard-controller&source=md-export) — $25.00
- [Typeractive](https://openhardware.directory/r?to=https%3A%2F%2Ftyperactive.xyz%2Fproducts%2Fnice-nano&ref=openhardware.directory&product=nice-nano-v2-wireless-keyboard-controller&source=md-export) — $25.00
- [Boardsource](https://openhardware.directory/r?to=https%3A%2F%2Fboardsource.xyz%2Fproducts%2Fnice-nano-v2-0&ref=openhardware.directory&product=nice-nano-v2-wireless-keyboard-controller&source=md-export) — $25.00
- [splitkb.com](https://openhardware.directory/r?to=https%3A%2F%2Fsplitkb.com%2Fproducts%2Fnice-nano&ref=openhardware.directory&product=nice-nano-v2-wireless-keyboard-controller&source=md-export) — €21.44

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fnicekeyboards.com%2Fnice-nano%2F&ref=openhardware.directory&product=nice-nano-v2-wireless-keyboard-controller&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fnicekeyboards.com%2Fdocs%2Fnice-nano%2F&ref=openhardware.directory&product=nice-nano-v2-wireless-keyboard-controller&source=md-export)

## Tags

`nice-nano`, `nrf52840`, `keyboard`, `wireless`, `bluetooth`, `zmk`, `pro-micro`, `split-keyboard`, `zephyr`

---
[View full device page](https://openhardware.directory/s/1370/nice-nano-v2-wireless-keyboard-controller)

---

# DFRobot Beetle RP2350

> Ultra-affordable RP2350 dual-architecture development board with switchable ARM Cortex-M33 / RISC-V cores, LiPo charging, 11 GPIO pins, and USB-C in a 25x20.5mm package.

## Quick Facts

- **Brand:** DFRobot
- **Price:** ~$4.9
- **CPU:** RP2350 Dual-core ARM Cortex-M33 / RISC-V Hazard3 @ 150MHz
- **RAM:** 520KB SRAM
- **Flash:** 2MB
- **USB:** USB-C
- **Power:** 5V via USB-C / LiPo battery (BAT pin)
- **Dimensions:** 25 × 20.5mm

## Components

- **RP2350** (mcu): Raspberry Pi RP2350 with switchable dual-core ARM Cortex-M33 and RISC-V Hazard3 cores at 150MHz, 520KB SRAM, PIO state machines, and hardware security features. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=dfrobot-beetle-rp2350&source=md-export)

## Protocols

- **UART** (UART0): TX=GPIO0, RX=GPIO1
- **SPI** (SPI0): SCK=GPIO2, MOSI=GPIO3, MISO=GPIO4, CS=GPIO5
- **I2C** (I2C0): SDA=GPIO20, SCL=GPIO21

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Digital I/O / UART TX | — | digital-input, digital-output, pwm |
| GPIO1 | Digital I/O / UART RX | — | digital-input, digital-output, pwm |
| GPIO2 | Digital I/O / SPI SCK | — | digital-input, digital-output, pwm |
| GPIO3 | Digital I/O / SPI TX | — | digital-input, digital-output, pwm |
| GPIO4 | Digital I/O / SPI RX | — | digital-input, digital-output, pwm |
| GPIO5 | Digital I/O / SPI CS | — | digital-input, digital-output, pwm |
| GPIO20 | Digital I/O / I2C SDA | — | digital-input, digital-output, pwm |
| GPIO21 | Digital I/O / I2C SCL | — | digital-input, digital-output, pwm |
| GPIO26 | Analog A0 / I2C SDA | — | digital-input, digital-output, adc, pwm |
| GPIO27 | Analog A1 / I2C SCL | — | digital-input, digital-output, adc, pwm |
| GPIO25 | Onboard LED | — | digital-input, digital-output, pwm |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2913.html&ref=openhardware.directory&product=dfrobot-beetle-rp2350&source=md-export) — $4.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2913.html&ref=openhardware.directory&product=dfrobot-beetle-rp2350&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_DFR1188_Beetle_RP2350&ref=openhardware.directory&product=dfrobot-beetle-rp2350&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=dfrobot-beetle-rp2350&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdfimg.dfrobot.com%2F5d57611a3416442fa39bffca%2Fwiki%2Ff18e5f3a683e6d8a9c8582ac6f89b023.pdf&ref=openhardware.directory&product=dfrobot-beetle-rp2350&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-beetle-rp2350)

---

# D-Robotics RDK X3

> AI-focused single board computer with 5 TOPS NPU, quad-core ARM Cortex-A53, 4GB LPDDR4, dual MIPI CSI cameras, and ROS2 support for robotics and edge AI.

## Quick Facts

- **Brand:** D-Robotics
- **Price:** ~$80
- **CPU:** ARM Cortex-A53 quad-core @ 1.5GHz + 5 TOPS BPU NPU
- **RAM:** 4GB LPDDR4
- **Flash:** microSD (user-supplied)
- **USB:** USB 3.0 + 2x USB 2.0 + Micro-USB (device)
- **Power:** 5V/3A

## Connectivity

WiFi 2.4/5GHz 802.11 b/g/n | Bluetooth BLE 4.2 | Ethernet Gigabit

## Components

- **Sunrise-3** (mcu): D-Robotics Sunrise 3 SoC with quad-core ARM Cortex-A53 at 1.5GHz and dual-core Bernoulli Processing Unit delivering 5 TOPS AI inference performance. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.d-robotics.cc%2Fen%2Fdocumentation&ref=openhardware.directory&product=d-robotics-rdk-x3&source=md-export)

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2869.html&ref=openhardware.directory&product=d-robotics-rdk-x3&source=md-export) — $80.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2869.html&ref=openhardware.directory&product=d-robotics-rdk-x3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.d-robotics.cc%2Fen%2Fdocumentation&ref=openhardware.directory&product=d-robotics-rdk-x3&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/d-robotics-rdk-x3)

---

# Arduino Nano Matter

> Ultra-compact Matter/Thread/BLE development board based on Silicon Labs MGM240S, bringing official Matter support to the beloved Arduino Nano form factor at 45×18mm.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$22
- **CPU:** ARM Cortex-M33 @ 78MHz, FPU, DSP, Secure Vault
- **RAM:** 256KB SRAM
- **Flash:** 1536KB
- **USB:** USB-C (power,SWD debug)
- **Power:** 5V via USB-C or header pins
- **Dimensions:** 45 × 18mm

## Connectivity

Bluetooth BLE 5.3 | Zigbee Zigbee 3.0

## Compatible Firmware

- arduino
- zephyr

## Components

- **MGM240SD22VNA** (mcu): Silicon Labs multiprotocol wireless module with ARM Cortex-M33 @ 78MHz, 1536KB flash, 256KB RAM, Matter/Thread/Zigbee/BLE 5.3, and Secure Vault hardware security. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2Fmgm240s-datasheet.pdf&ref=openhardware.directory&product=arduino-nano-matter&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX | — | digital-input, digital-output |
| D1 | UART TX | — | digital-input, digital-output |
| D2 | GPIO | — | digital-input, digital-output, pwm |
| D3 | GPIO/PWM | — | digital-input, digital-output, pwm |
| D4 | GPIO | — | digital-input, digital-output |
| D5 | GPIO/PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO/PWM | — | digital-input, digital-output, pwm |
| D7 | GPIO | — | digital-input, digital-output |
| D8 | GPIO | — | digital-input, digital-output |
| D9 | GPIO/PWM | — | digital-input, digital-output, pwm |
| D10 | SPI CS | — | digital-input, digital-output |
| D11 | SPI MOSI | — | digital-input, digital-output |
| D12 | SPI MISO | — | digital-input, digital-output |
| D13 | SPI CLK | — | digital-input, digital-output |
| A0 | ADC0 | — | digital-input, digital-output, adc |
| A1 | ADC1 | — | digital-input, digital-output, adc |
| A2 | ADC2 | — | digital-input, digital-output, adc |
| A3 | ADC3 | — | digital-input, digital-output, adc |
| A4 | I2C SDA / ADC4 | — | digital-input, digital-output, adc |
| A5 | I2C SCL / ADC5 | — | digital-input, digital-output, adc |
| A6 | ADC6 | — | digital-input, digital-output, adc |
| A7 | ADC7 | — | digital-input, digital-output, adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fnano-matter&ref=openhardware.directory&product=arduino-nano-matter&source=md-export) — $22.00
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnano-matter&ref=openhardware.directory&product=arduino-nano-matter&source=md-export) — €24.30
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FABX00112%2F23099932&ref=openhardware.directory&product=arduino-nano-matter&source=md-export) — $24.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FABX00112&ref=openhardware.directory&product=arduino-nano-matter&source=md-export) — $24.00

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnano-matter&ref=openhardware.directory&product=arduino-nano-matter&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fnano-matter&ref=openhardware.directory&product=arduino-nano-matter&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FABX00112-ABX00137-datasheet.pdf&ref=openhardware.directory&product=arduino-nano-matter&source=md-export)

## Tags

`matter`, `thread`, `ble`, `silicon-labs`, `arm-cortex-m33`, `smart-home`, `802.15.4`, `nano-form-factor`, `low-power`

---
[View full device page](https://openhardware.directory/s/1370/arduino-nano-matter)

---

# TI SK-AM62P-LP Starter Kit

> Texas Instruments AM62P Sitara vision-enabled evaluation board with quad-core Cortex-A53 @ 1.4GHz, vision DSP, 4GB LPDDR4, dual Gigabit Ethernet, M.2 WiFi, microSD, and 5V USB-C power for machine vision and industrial HMI applications.

## Quick Facts

- **Brand:** Texas Instruments
- **Board Type:** linux-sbc
- **Price:** ~$229
- **CPU:** ti-am62p
- **RAM:** 4GB LPDDR4
- **Flash:** microSD boot
- **USB:** USB 2.0 + USB-C
- **Power:** 5V

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- armbian

## Where to Buy

- [TI Store](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FSK-AM62P-LP%2Fpart-details%2FSK-AM62P-LP&ref=openhardware.directory&product=ti-sk-am62p-lp&source=md-export) — $229.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Ftexas-instruments-sk-am62p-lp%2F&ref=openhardware.directory&product=ti-sk-am62p-lp&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/ti-sk-am62p-lp)

---

# Adafruit GEMMA M0

> Coin-sized wearable microcontroller board with ATSAMD21E18 Cortex M0+ at 48MHz, 3 I/O sew pads, built-in RGB DotStar LED, and CircuitPython pre-installed. Designed for e-textiles and wearable projects.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$9.95
- **CPU:** ATSAMD21E18 ARM Cortex M0+
- **RAM:** 32 KB
- **Flash:** 256 KB
- **Power:** 5V via Micro USB or LiPo battery via JST connector
- **Dimensions:** 27.95mm × 27.95mm × 6.4mm

## Compatible Firmware

- circuitpython
- arduino

## Components

- **ATSAMD21E18** (mcu): 32-bit ARM Cortex M0+ microcontroller at 48 MHz with 256 KB flash and 32 KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM-D21DA1-Family-Data-Sheet-DS40001882G.pdf&ref=openhardware.directory&product=adafruit-gemma-m0&source=md-export)
- **APA102 DotStar** (led): Built-in RGB DotStar LED for status indication and animations. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F2343%2FSK9822_FINAL.pdf&ref=openhardware.directory&product=adafruit-gemma-m0&source=md-export)

## Protocols

- **I2C**: SDA=D0, SCL=D1
- **SPI**: MOSI=D3, MISO=D4, SCK=D2
- **UART**: TX=D1, RX=D0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | SDA | — | digital-input, digital-output, analog-input, touch |
| D1 | SCL | — | digital-input, digital-output, pwm, touch, dac |
| D2 | ADC | — | digital-input, digital-output, analog-input, touch |
| D3 | MOSI | — | digital-input, digital-output, pwm |
| D4 | MISO | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3501&ref=openhardware.directory&product=adafruit-gemma-m0&source=md-export) — 9.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3501&ref=openhardware.directory&product=adafruit-gemma-m0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3501&ref=openhardware.directory&product=adafruit-gemma-m0&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-gemma-m0%2Foverview&ref=openhardware.directory&product=adafruit-gemma-m0&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-GEMMA-M0-PCB&ref=openhardware.directory&product=adafruit-gemma-m0&source=md-export)
- [schematic](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-GEMMA-M0-PCB%2Fblob%2Fmaster%2FAdafruit%2520Gemma%2520M0.sch&ref=openhardware.directory&product=adafruit-gemma-m0&source=md-export)

## Tags

`wearable`, `circuitpython`, `arduino`, `atsamd21`, `cortex-m0`, `adafruit`, `gemma`, `e-textiles`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-gemma-m0)

---

# Raspberry Pi 4 Model B

> Flagship Raspberry Pi SBC with BCM2711 quad-core Cortex-A72 @ 1.5GHz, dual-band WiFi, Gigabit Ethernet, dual micro-HDMI 4K outputs, USB 3.0, and USB-C power. Available in 1GB, 2GB, 4GB, and 8GB LPDDR4 RAM variants.

## Quick Facts

- **Brand:** Raspberry Pi
- **Board Type:** sbc
- **Price:** ~$35
- **CPU:** BCM2711 quad-core ARM Cortex-A72 @ 1.5GHz, 64-bit
- **RAM:** 1GB / 2GB / 4GB / 8GB LPDDR4-3200 (variant-dependent)
- **Flash:** microSD (external)
- **USB:** 2x USB 3.0 + 2x USB 2.0 Type-A
- **Power:** 5.1V 3A via USB-C
- **Dimensions:** 85 x 56 x 17mm

## Connectivity

WiFi 802.11ac dual-band (2.4GHz + 5GHz) | Bluetooth Bluetooth 5.0 / BLE | Zigbee false | Ethernet Gigabit Ethernet (RJ45, PoE-capable via HAT)

## Compatible Firmware

- raspberry-pi-os
- ubuntu
- home-assistant-os

## Components

- **BCM2711** (mcu): Broadcom BCM2711 quad-core ARM Cortex-A72 @ 1.5GHz, VideoCore VI GPU, 4Kp60 HEVC decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fbcm2711%2Fbcm2711-peripherals.pdf&ref=openhardware.directory&product=raspberry-pi-4-model-b&source=md-export)
- **CYW43455** (radio): Cypress CYW43455 dual-band 802.11ac WiFi + Bluetooth 5.0/BLE combo chip. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.infineon.com%2Fdgdl%2FInfineon-CYW43455-DataSheet-v06_00-EN.pdf%3FfileId%3D8ac78c8c7d0d8da4017d0ee8af8b5c9c&ref=openhardware.directory&product=raspberry-pi-4-model-b&source=md-export)

## Protocols

- **I2C**: SDA=GPIO2, SCL=GPIO3
- **SPI**: MOSI=GPIO10, MISO=GPIO9, SCK=GPIO11, CE0=GPIO8, CE1=GPIO7
- **UART**: TX=GPIO14, RX=GPIO15
- **I2S**: CLK=GPIO18, FS=GPIO19, DIN=GPIO20, DOUT=GPIO21
- **PWM**: PWM0=GPIO12, PWM1=GPIO13
- **GPIO**
- **USB**
- **HDMI**
- **CSI**
- **DSI**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | SDA1 | — | I2C, GPIO |
| GPIO3 | SCL1 | — | I2C, GPIO |
| GPIO4 | GPIO | — | GPIO, PWM |
| GPIO5 | GPIO | — | GPIO |
| GPIO6 | GPIO | — | GPIO |
| GPIO7 | SPI0_CE1 | — | SPI, GPIO |
| GPIO8 | SPI0_CE0 | — | SPI, GPIO |
| GPIO9 | MISO | — | SPI, GPIO |
| GPIO10 | MOSI | — | SPI, GPIO |
| GPIO11 | SCLK | — | SPI, GPIO |
| GPIO12 | PWM0 | — | PWM, GPIO |
| GPIO13 | PWM1 | — | PWM, GPIO |
| GPIO14 | TXD0 | — | UART, GPIO |
| GPIO15 | RXD0 | — | UART, GPIO |
| GPIO16 | GPIO | — | GPIO |
| GPIO17 | GPIO | — | GPIO |
| GPIO18 | PCM_CLK | — | I2S, PWM, GPIO |
| GPIO19 | PCM_FS | — | I2S, PWM, GPIO |
| GPIO20 | PCM_DIN | — | I2S, GPIO |
| GPIO21 | PCM_DOUT | — | I2S, GPIO |
| GPIO22 | GPIO | — | GPIO |
| GPIO23 | GPIO | — | GPIO |
| GPIO24 | GPIO | — | GPIO |
| GPIO25 | GPIO | — | GPIO |
| GPIO26 | GPIO | — | GPIO |
| GPIO27 | GPIO | — | GPIO |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit (1GB)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4295&ref=openhardware.directory&product=raspberry-pi-4-model-b&source=md-export) — 35
- [Adafruit (2GB)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4292&ref=openhardware.directory&product=raspberry-pi-4-model-b&source=md-export) — 45
- [Adafruit (4GB)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4296&ref=openhardware.directory&product=raspberry-pi-4-model-b&source=md-export) — 55
- [Adafruit (8GB)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4564&ref=openhardware.directory&product=raspberry-pi-4-model-b&source=md-export) — 123.5

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4564&ref=openhardware.directory&product=raspberry-pi-4-model-b&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F4564&ref=openhardware.directory&product=raspberry-pi-4-model-b&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fproducts%2Fraspberry-pi-4-model-b%2F&ref=openhardware.directory&product=raspberry-pi-4-model-b&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frpi4%2Fraspberry-pi-4-product-brief.pdf&ref=openhardware.directory&product=raspberry-pi-4-model-b&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fraspberrypi&ref=openhardware.directory&product=raspberry-pi-4-model-b&source=md-export)

## Tags

`raspberry-pi`, `sbc`, `arm`, `cortex-a72`, `linux`, `wifi`, `gigabit-ethernet`, `4k`, `usb3`

## Certifications

RoHS, FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/raspberry-pi-4-model-b)

---

# Arduino Leonardo

> Arduino board with ATmega32u4 featuring native USB — no separate USB chip needed — allowing it to emulate keyboards, mice, and joysticks while maintaining full Arduino IDE compatibility.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$23
- **CPU:** ATmega32u4 @ 16 MHz
- **RAM:** 2.5 KB
- **Flash:** 32 KB
- **Power:** 5V via Micro USB or 7-12V DC barrel jack

## Compatible Firmware

- arduino
- platformio

## Components

- **ATmega32u4** (mcu): 8-bit AVR microcontroller with integrated USB controller at 16 MHz, 32KB flash, 2.5KB SRAM, 1KB EEPROM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=arduino-leonardo&source=md-export)

## Protocols

- **UART**: TX=D1, RX=D0
- **SPI**: MOSI=D16, MISO=D14, SCK=D15, SS=D10
- **I2C**: SDA=D2, SCL=D3
- **USB**
- **ICSP**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX / INT2 | — | digital-input, digital-output, interrupt |
| D1 | TX / INT3 | — | digital-input, digital-output, interrupt |
| D2 | SDA / INT1 | — | digital-input, digital-output, interrupt |
| D3 | SCL / INT0 / PWM | — | digital-input, digital-output, pwm, interrupt |
| D4 | GPIO / A6 | — | digital-input, digital-output, analog-input |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / A7 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D7 | GPIO / INT6 | — | digital-input, digital-output, interrupt |
| D8 | GPIO / A8 | — | digital-input, digital-output, analog-input |
| D9 | GPIO / A9 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D10 | SS / A10 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D11 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D12 | GPIO / A11 | — | digital-input, digital-output, analog-input |
| D13 | LED / PWM | — | digital-input, digital-output, pwm |
| D14 | MISO | — | digital-input, digital-output |
| D15 | SCK | — | digital-input, digital-output |
| D16 | MOSI | — | digital-input, digital-output |
| A0 | Analog 0 / D18 | — | analog-input, digital-input, digital-output |
| A1 | Analog 1 / D19 | — | analog-input, digital-input, digital-output |
| A2 | Analog 2 / D20 | — | analog-input, digital-input, digital-output |
| A3 | Analog 3 / D21 | — | analog-input, digital-input, digital-output |
| A4 | Analog 4 / D22 | — | analog-input, digital-input, digital-output |
| A5 | Analog 5 / D23 | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Farduino-leonardo-with-headers&ref=openhardware.directory&product=arduino-leonardo&source=md-export) — $23.00
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Farduino-leonardo-with-headers&ref=openhardware.directory&product=arduino-leonardo&source=md-export) — €25.40
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FA000057%2F3476356&ref=openhardware.directory&product=arduino-leonardo&source=md-export) — $24.50
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FA000057&ref=openhardware.directory&product=arduino-leonardo&source=md-export) — $24.50
- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB008A36R2Y&ref=openhardware.directory&product=arduino-leonardo&source=md-export) — $24.50

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F849&ref=openhardware.directory&product=arduino-leonardo&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fleonardo&ref=openhardware.directory&product=arduino-leonardo&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=arduino-leonardo&source=md-export)

## Tags

`arduino`, `atmega32u4`, `native-usb`, `usb-hid`, `keyboard-emulation`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/arduino-leonardo)

---

# Adafruit Feather 32u4 RFM69HCW 868/915 MHz

> ATmega32u4 Feather board with RFM69HCW sub-GHz radio supporting 868/915 MHz with up to +20 dBm transmit power, AES-128 encryption, and 100mA LiPo charger for long-range IoT sensor networks.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$24.95
- **CPU:** ATmega32u4 @ 8 MHz
- **RAM:** 2.5KB SRAM
- **Flash:** 32KB
- **Power:** 5V + LiPo
- **Dimensions:** 51 × 23 × 8 mm

## Compatible Firmware

- arduino

## Components

- **ATmega32u4** (mcu): 8-bit AVR microcontroller at 8MHz, 3.3V, native USB, 32KB flash, 2.5KB SRAM. — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.atmel.com%2FImages%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw-868-915&source=md-export)
- **RFM69HCW** (sub-ghz-radio): HopeRF RFM69HCW 868/915MHz radio module based on SX1231, +13 to +20 dBm TX, AES-128, FSK/OOK modulation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3076%2FRFM69HCW-V1.1.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw-868-915&source=md-export)

## Protocols

- **SPI**: MOSI=D16, MISO=D14, SCK=D15
- **I2C**: SDA=D2, SCL=D3
- **UART**: TX=D1, RX=D0
- **RFM69 packet radio**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX — UART Receive | — | digital-input, digital-output |
| D1 | TX — UART Transmit | — | digital-input, digital-output |
| D5 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D9 | D9 — GPIO / PWM / Analog | — | digital-input, digital-output, pwm, analog-input |
| D10 | D10 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D16 | D11/MOSI — SPI MOSI | — | digital-input, digital-output |
| D14 | D12/MISO — SPI MISO | — | digital-input, digital-output |
| D15 | D13/SCK — SPI Clock / LED | — | digital-input, digital-output |
| D2 | SDA — I2C Data | — | digital-input, digital-output |
| D3 | SCL — I2C Clock | — | digital-input, digital-output |
| D15 | A0 — Analog In | — | analog-input |
| D4 | A1 — Analog In | — | analog-input |
| D5 | A2 — Analog In | — | analog-input |
| D12 | A3 — Analog In | — | analog-input |
| D24 | A4/SDA — Analog In / I2C SDA | — | analog-input, digital-input, digital-output |
| D25 | A5/SCL — Analog In / I2C SCL | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3076&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw-868-915&source=md-export) — 24.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3076&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw-868-915&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-32u4-RFM-LoRa-PCB&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw-868-915&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-32u4-radio-with-rfm69hcw-module%2Foverview&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw-868-915&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3076%2FRFM69HCW-V1.1.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw-868-915&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fassets%2Fassets%2F000%2F031%2F603%2Fmedium800%2Ffeather_schem.png&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw-868-915&source=md-export)

## Tags

`feather`, `rfm69`, `sub-ghz`, `868mhz`, `915mhz`, `atmega32u4`, `iot`, `sensor-network`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-32u4-rfm69hcw-868-915)

---

# Adafruit Feather 32u4 RFM69HCW 433 MHz

> ATmega32u4 Feather board with RFM69HCW sub-GHz radio at 433 MHz with up to +20 dBm transmit power, AES-128 encryption, and built-in LiPo charger for long-range sensor networks in the 433 MHz ISM band.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$24.95
- **CPU:** ATmega32u4 @ 8 MHz
- **RAM:** 2.5KB SRAM
- **Flash:** 32KB
- **Power:** 5V + LiPo
- **Dimensions:** 51 × 23 × 8 mm

## Compatible Firmware

- arduino

## Components

- **ATmega32u4** (mcu): 8-bit AVR microcontroller at 8MHz, 3.3V, native USB, 32KB flash, 2.5KB SRAM. — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.atmel.com%2FImages%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw-433&source=md-export)
- **RFM69HCW** (sub-ghz-radio): HopeRF RFM69HCW 433MHz radio module based on SX1231, +13 to +20 dBm TX, AES-128, FSK/OOK modulation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3076%2FRFM69HCW-V1.1.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw-433&source=md-export)

## Protocols

- **SPI**: MOSI=D16, MISO=D14, SCK=D15
- **I2C**: SDA=D2, SCL=D3
- **UART**: TX=D1, RX=D0
- **RFM69 packet radio**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX — UART Receive | — | digital-input, digital-output |
| D1 | TX — UART Transmit | — | digital-input, digital-output |
| D5 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D9 | D9 — GPIO / PWM / Analog | — | digital-input, digital-output, pwm, analog-input |
| D10 | D10 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D16 | D11/MOSI — SPI MOSI | — | digital-input, digital-output |
| D14 | D12/MISO — SPI MISO | — | digital-input, digital-output |
| D15 | D13/SCK — SPI Clock / LED | — | digital-input, digital-output |
| D2 | SDA — I2C Data | — | digital-input, digital-output |
| D3 | SCL — I2C Clock | — | digital-input, digital-output |
| D15 | A0 — Analog In | — | analog-input |
| D4 | A1 — Analog In | — | analog-input |
| D5 | A2 — Analog In | — | analog-input |
| D12 | A3 — Analog In | — | analog-input |
| D24 | A4/SDA — Analog In / I2C SDA | — | analog-input, digital-input, digital-output |
| D25 | A5/SCL — Analog In / I2C SCL | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3077&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw-433&source=md-export) — 24.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3077&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw-433&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-32u4-RFM-LoRa-PCB&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw-433&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-32u4-radio-with-rfm69hcw-module%2Foverview&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw-433&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3076%2FRFM69HCW-V1.1.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw-433&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fassets%2Fassets%2F000%2F031%2F603%2Fmedium800%2Ffeather_schem.png&ref=openhardware.directory&product=adafruit-feather-32u4-rfm69hcw-433&source=md-export)

## Tags

`feather`, `rfm69`, `433mhz`, `sub-ghz`, `atmega32u4`, `iot`, `sensor-network`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-32u4-rfm69hcw-433)

---

# Adafruit KB2040

> Arduino Pro Micro-compatible RP2040 keyboard controller with 8 MB flash, 20 GPIO, STEMMA QT, castellated USB pads, NeoPixel, and QMK/KMK/CircuitPython support for custom mechanical keyboards.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** keyboard-pcb
- **Price:** ~$8.95
- **CPU:** ARM Cortex-M0+ dual-core @ 125 MHz (RP2040)
- **RAM:** 264 KB SRAM
- **Flash:** 8MB SiP
- **Power:** 5V
- **Dimensions:** 35 × 17.8 × 4.9 mm

## Compatible Firmware

- circuitpython
- arduino
- pico-sdk
- KMK
- qmk

## Components

- **RP2040** (mcu): Raspberry Pi RP2040 dual-core ARM Cortex-M0+ at 125 MHz with 264 KB SRAM, PIO state machines, and native USB for HID keyboard emulation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=adafruit-kb2040&source=md-export)
- **WS2812B** (led): Addressable RGB LED for status and user feedback. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=adafruit-kb2040&source=md-export)

## Protocols

- **I2C**: SDA=GPIO2, SCL=GPIO3
- **SPI**: MOSI=GPIO3, MISO=GPIO4, SCK=GPIO6
- **UART**: TX=GPIO0, RX=GPIO1
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | TX — UART | — | digital-input, digital-output, pwm |
| GPIO1 | RX — UART | — | digital-input, digital-output, pwm |
| GPIO2 | SDA — I2C | — | digital-input, digital-output, pwm |
| GPIO3 | SCL — I2C | — | digital-input, digital-output, pwm |
| GPIO4 | D4 — GPIO | — | digital-input, digital-output, pwm |
| GPIO6 | D6 — GPIO | — | digital-input, digital-output, pwm |
| GPIO7 | D7 — GPIO | — | digital-input, digital-output, pwm |
| GPIO8 | D8 — GPIO | — | digital-input, digital-output, pwm |
| GPIO9 | D9 — GPIO | — | digital-input, digital-output, pwm |
| GPIO10 | D10 — GPIO | — | digital-input, digital-output, pwm |
| GPIO16 | SDA — I2C (STEMMA QT) | — | digital-input, digital-output, pwm |
| GPIO17 | SCL — I2C (STEMMA QT) | — | digital-input, digital-output, pwm |
| GPIO18 | SCK — SPI | — | digital-input, digital-output, pwm |
| GPIO19 | MOSI — SPI | — | digital-input, digital-output, pwm |
| GPIO20 | MISO — SPI | — | digital-input, digital-output, pwm |
| GPIO26 | A0 — ADC0 | — | analog-input, digital-input, digital-output, pwm |
| GPIO27 | A1 — ADC1 | — | analog-input, digital-input, digital-output, pwm |
| GPIO28 | A2 — ADC2 | — | analog-input, digital-input, digital-output, pwm |
| GPIO29 | A3 — ADC3 | — | analog-input, digital-input, digital-output, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5302&ref=openhardware.directory&product=adafruit-kb2040&source=md-export) — 8.95

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_kb2040%2F&ref=openhardware.directory&product=adafruit-kb2040&source=md-export)
- [QMK Firmware](https://openhardware.directory/r?to=https%3A%2F%2Fqmk.fm%2F&ref=openhardware.directory&product=adafruit-kb2040&source=md-export)
- [KMK Firmware](https://openhardware.directory/r?to=https%3A%2F%2Fkmkfw.io%2F&ref=openhardware.directory&product=adafruit-kb2040&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5302&ref=openhardware.directory&product=adafruit-kb2040&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-KB2040-PCB&ref=openhardware.directory&product=adafruit-kb2040&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-kb2040&ref=openhardware.directory&product=adafruit-kb2040&source=md-export)

## Tags

`rp2040`, `kb2040`, `mechanical-keyboard`, `pro-micro`, `qmk`, `kmk`, `circuitpython`, `stemma-qt`, `usb-c`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-kb2040)

---

# Adafruit Trinket M0

> Ultra-compact ATSAMD21E18 ARM Cortex-M0+ board at 48 MHz with 256KB flash, 32KB RAM, 5 GPIO pins, built-in RGB DotStar LED, capacitive touch, native USB, and CircuitPython support. Weighs just 1.4g in 27mm × 15mm form factor.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$8.95
- **CPU:** ATSAMD21E18 ARM Cortex-M0+ @ 48 MHz
- **RAM:** 32KB SRAM
- **Flash:** 256KB
- **Power:** 5V via USB or external pin
- **Dimensions:** 27 × 15.3 × 2.75 mm

## Compatible Firmware

- arduino
- circuitpython

## Components

- **ATSAMD21E18** (mcu): ARM Cortex-M0+ at 48MHz, 256KB flash, 32KB SRAM, native USB supporting serial/HID/MIDI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fassets%2Fassets%2F000%2F044%2F363%2Foriginal%2Fsamd21.pdf&ref=openhardware.directory&product=adafruit-trinket-m0&source=md-export)

## Protocols

- **SPI**: MOSI=PA07, MISO=PA06
- **I2C**: SDA=PA06, SCL=PA07
- **UART**: TX=PA02, RX=PA08
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA08 | D0 — GPIO / UART RX / Analog / Capacitive Touch | — | digital-input, digital-output, analog-input |
| PA02 | D1 — GPIO / UART TX / Analog / Capacitive Touch / DAC | — | digital-input, digital-output, analog-input, analog-output |
| PA09 | D2 — GPIO / Analog / Capacitive Touch | — | digital-input, digital-output, analog-input |
| PA07 | D3/SCL — GPIO / I2C SCL / PWM / SPI MOSI / Analog | — | digital-input, digital-output, analog-input, pwm |
| PA06 | D4/SDA — GPIO / I2C SDA / PWM / SPI MISO / Analog | — | digital-input, digital-output, analog-input, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3500&ref=openhardware.directory&product=adafruit-trinket-m0&source=md-export) — 8.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3500&ref=openhardware.directory&product=adafruit-trinket-m0&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Trinket-M0-PCB&ref=openhardware.directory&product=adafruit-trinket-m0&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-trinket-m0-circuitpython-arduino%2Foverview&ref=openhardware.directory&product=adafruit-trinket-m0&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fassets%2Fassets%2F000%2F044%2F363%2Foriginal%2Fsamd21.pdf&ref=openhardware.directory&product=adafruit-trinket-m0&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-learn.adafruit.com%2Fassets%2Fassets%2F000%2F045%2F723%2Fmedium800%2Fadafruit_products_schem.png&ref=openhardware.directory&product=adafruit-trinket-m0&source=md-export)

## Tags

`trinket`, `atsamd21`, `arm-cortex-m0`, `circuitpython`, `dotstar`, `tiny`, `wearable`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-trinket-m0)

---

# Heltec LoRa Kit 151

> Ultra-low-power LoRaWAN development kit based on STM32L151CBU6 ARM Cortex-M3 MCU and Semtech SX1278 LoRa transceiver, with 6uA deep sleep current, integrated battery management, and CE certification.

## Quick Facts

- **Brand:** heltec
- **Price:** ~$13.5
- **CPU:** ARM Cortex-M3 single-core @ 32MHz, ultra-low-power
- **RAM:** 16KB SRAM
- **Flash:** 128KB
- **USB:** Micro-USB
- **Power:** 5V via Micro-USB,3.7V LiPo
- **Dimensions:** 56.3 x 25.5 x 7.8mm

## Components

- **STM32L151CBU6** (mcu): STMicroelectronics STM32L151CBU6 ultra-low-power 32-bit ARM Cortex-M3 MCU running at up to 32MHz with 128KB flash, 16KB SRAM, 4KB EEPROM, 12-bit ADC/DAC, and deep sleep current as low as 6uA. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32l151cc.pdf&ref=openhardware.directory&product=heltec-lora-kit-151&source=md-export)
- **SX1278** (radio): Semtech SX1278 LoRa transceiver supporting 137-525MHz with LoRa modulation, -135dBm sensitivity at SF12/125kHz, and +19dBm maximum TX power for long-range LPWAN communication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3179%2Fsx1276_77_78_79.pdf&ref=openhardware.directory&product=heltec-lora-kit-151&source=md-export)
- **CP2102** (usb-uart): Silicon Labs CP2102 single-chip USB to UART bridge IC providing USB 2.0 full-speed connectivity for programming and serial debug output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=heltec-lora-kit-151&source=md-export)
- **TP4054** (battery-charger): TP4054 single-cell lithium-ion/polymer battery charger with programmable charge current, providing integrated battery management with USB/battery automatic power switching. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.alldatasheet.com%2Fdatasheet-pdf%2Fpdf%2F1132571%2FETC2%2FTP4054.html&ref=openhardware.directory&product=heltec-lora-kit-151&source=md-export)

## Protocols

- **SPI1** (SPI1): SCK=PA5, MISO=PA6, MOSI=PA7, NSS=PA4
- **SPI2** (SPI2): SCK=PB13, MISO=PB14, MOSI=PB15, NSS=PB12
- **SPI3** (SPI3): SCK=PB3, MISO=PB4, MOSI=PB5, NSS=PA15
- **I2C1** (I2C1): SCL=PB8, SDA=PB9
- **I2C2** (I2C2): SCL=PB10, SDA=PB11
- **UART1** (UART1): TX=PA9, RX=PA10
- **UART2** (UART2): TX=PA2, RX=PA3
- **UART3** (UART3): TX=PB10, RX=PB11
- **ADC**
- **DAC**
- **SWD**: SWDIO=PA13, SWCLK=PA14

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| PA0 | ADC_IN0, WKUP — Analog Input / Wake-up | — | digital-input, digital-output, adc, pwm |
| PA1 | ADC_IN1 — Analog Input | — | digital-input, digital-output, adc, pwm |
| PA2 | ADC_IN2, TX2 — UART2 Transmit / Analog | — | digital-input, digital-output, adc, pwm |
| PA3 | ADC_IN3, RX2 — UART2 Receive / Analog | — | digital-input, digital-output, adc, pwm |
| PA4 | LoRa_NSS, DAC_OUT1, ADC_IN4, NSS1 — LoRa Chip Select (reserved) | — | digital-input, digital-output, adc, dac |
| PA5 | LoRa_SCK, DAC_OUT2, ADC_IN5, SCK1 — LoRa SPI Clock (reserved) | — | digital-input, digital-output, adc, dac |
| PA6 | LoRa_MISO, ADC_IN6, MISO1 — LoRa SPI MISO (reserved) | — | digital-input, digital-output, adc |
| PA7 | LoRa_MOSI, ADC_IN7, MOSI1 — LoRa SPI MOSI (reserved) | — | digital-input, digital-output, adc |
| PA8 | GPIO — General Purpose I/O | — | digital-input, digital-output, pwm |
| PA9 | TX1 — UART1 Transmit | — | digital-input, digital-output, pwm |
| PA10 | RX1 — UART1 Receive | — | digital-input, digital-output, pwm |
| PA13 | SWDIO — Serial Wire Debug Data | — | digital-input, digital-output |
| PA14 | SWCLK — Serial Wire Debug Clock | — | digital-input, digital-output |
| PA15 | NSS1/NSS3 — SPI Chip Select | — | digital-input, digital-output, pwm |
| PB0 | LoRa_DIO3, ADC_IN8 — LoRa Interrupt (reserved) | — | digital-input, digital-output, adc |
| PB1 | LoRa_DIO2, ADC_IN9 — LoRa Interrupt (reserved) | — | digital-input, digital-output, adc |
| PB3 | SCK1/SCK3, Vext control — SPI Clock / External Power Control | — | digital-input, digital-output, pwm |
| PB4 | MISO1/MISO3 — SPI MISO | — | digital-input, digital-output, pwm |
| PB5 | MOSI3/MOSI1 — SPI MOSI | — | digital-input, digital-output, pwm |
| PB6 | SCL1 — I2C1 Clock | — | digital-input, digital-output |
| PB7 | SDA1 — I2C1 Data | — | digital-input, digital-output |
| PB8 | SCL1, LED — I2C1 Clock / LED | — | digital-input, digital-output, pwm |
| PB9 | SDA1 — I2C1 Data | — | digital-input, digital-output |
| PB10 | SCL2, TX3 — I2C2 Clock / UART3 Transmit | — | digital-input, digital-output, pwm |
| PB11 | SDA2, RX3, LoRa_DIO0 — I2C2 Data / UART3 RX / LoRa Interrupt (reserved) | — | digital-input, digital-output |
| PB12 | NSS2, ADC_IN18 — SPI2 Chip Select / Analog | — | digital-input, digital-output, adc |
| PB13 | SCK2, ADC_IN19 — SPI2 Clock / Analog | — | digital-input, digital-output, adc |
| PB14 | MISO2, ADC_IN20 — SPI2 MISO / Analog | — | digital-input, digital-output, adc |
| PB15 | MOSI2, ADC_IN21 — SPI2 MOSI / Analog | — | digital-input, digital-output, adc |

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Flora-kit-151%2F&ref=openhardware.directory&product=heltec-lora-kit-151&source=md-export) — 13.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Flora-kit-151%2F&ref=openhardware.directory&product=heltec-lora-kit-151&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FLoRa_Kit_151%2Fkit151.pdf&ref=openhardware.directory&product=heltec-lora-kit-151&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FLoRa_Kit_151%2FLoRa_Kit_151_sch_diagram.PDF&ref=openhardware.directory&product=heltec-lora-kit-151&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation&ref=openhardware.directory&product=heltec-lora-kit-151&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.org%2Fen%2Fnode%2Fstm32%2Flora_node_151%2Findex.html&ref=openhardware.directory&product=heltec-lora-kit-151&source=md-export)

## Tags

`lora`, `lorawan`, `stm32`, `low-power`, `iot`, `sensor-node`, `battery-powered`

## Certifications

CE

---
[View full device page](https://openhardware.directory/s/1370/heltec-lora-kit-151)

---

# Arduino UNO R4 Minima

> The affordable entry to Arduino's R4 generation — Renesas RA4M1 ARM Cortex-M4F at 48MHz with 256KB flash, 32KB SRAM, 12-bit DAC, CAN bus, op-amp, and USB-C in the classic UNO form factor at 5V. No wireless, pure microcontroller power.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$15.9
- **CPU:** ARM Cortex-M4F @ 48MHz, FPU, DSP
- **RAM:** 32KB SRAM
- **Flash:** 256KB,8KB EEPROM
- **USB:** USB-C 2.0 (Full-Speed)
- **Power:** 5V via USB-C or 6-24V via Vin
- **Dimensions:** 68.85 × 53.34mm

## Compatible Firmware

- arduino
- micropython

## Components

- **R7FA4M1AB3CFM** (mcu): Renesas RA4M1 ARM Cortex-M4F at 48MHz with FPU, DSP, 256KB flash, 32KB SRAM, 14-bit ADC, 12-bit DAC, CAN 2.0B, and USB 2.0 Full-Speed. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2Fra4m1-datasheet.pdf&ref=openhardware.directory&product=arduino-uno-r4-minima&source=md-export)

## Protocols

- **SPI**: SS=D10, MOSI=D11, MISO=D12, SCK=D13
- **I2C**: SDA=A4/SDA, SCL=A5/SCL
- **UART**: RX=D0, TX=D1
- **CAN**: CANRX=D4, CANTX=D5
- **DAC**: DAC0=A0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX — UART Receive | — | digital-input, digital-output |
| D1 | TX — UART Transmit | — | digital-input, digital-output |
| D2 | Digital I/O | — | digital-input, digital-output |
| D3 | PWM Output | — | digital-input, digital-output, pwm |
| D4 | CAN RX | — | digital-input, digital-output |
| D5 | CAN TX / PWM | — | digital-input, digital-output, pwm |
| D6 | PWM Output | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output |
| D8 | Digital I/O | — | digital-input, digital-output |
| D9 | PWM Output | — | digital-input, digital-output, pwm |
| D10 | SPI SS / PWM | — | digital-input, digital-output, pwm |
| D11 | SPI MOSI / PWM | — | digital-input, digital-output, pwm |
| D12 | SPI MISO | — | digital-input, digital-output |
| D13 | SPI SCK / LED | — | digital-input, digital-output |
| A0 | Analog Input / DAC Output | — | digital-input, digital-output, adc, dac |
| A1 | Analog Input | — | digital-input, digital-output, adc |
| A2 | Analog Input | — | digital-input, digital-output, adc |
| A3 | Analog Input | — | digital-input, digital-output, adc |
| A4 | I2C SDA / Analog Input | — | digital-input, digital-output, adc |
| A5 | I2C SCL / Analog Input | — | digital-input, digital-output, adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Funo-r4-minima&ref=openhardware.directory&product=arduino-uno-r4-minima&source=md-export) — $15.90
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Funo-r4-minima&ref=openhardware.directory&product=arduino-uno-r4-minima&source=md-export) — €17.57
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FABX00080%2F20371540&ref=openhardware.directory&product=arduino-uno-r4-minima&source=md-export) — $20.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FABX00080&ref=openhardware.directory&product=arduino-uno-r4-minima&source=md-export) — $20.00
- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB0C8V5XLN4&ref=openhardware.directory&product=arduino-uno-r4-minima&source=md-export) — $20.00
- [SparkFun](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sparkfun.com%2Farduino-uno-r4-minima.html&ref=openhardware.directory&product=arduino-uno-r4-minima&source=md-export) — $20.00
- [The Pi Hut (UK)](https://openhardware.directory/r?to=https%3A%2F%2Fthepihut.com%2Fproducts%2Farduino-uno-r4-minima&ref=openhardware.directory&product=arduino-uno-r4-minima&source=md-export) — £14.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Funo-r4-minima&ref=openhardware.directory&product=arduino-uno-r4-minima&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Funo-r4-minima%2F&ref=openhardware.directory&product=arduino-uno-r4-minima&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FABX00080-datasheet.pdf&ref=openhardware.directory&product=arduino-uno-r4-minima&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fschematics%2FABX00080-schematics.pdf&ref=openhardware.directory&product=arduino-uno-r4-minima&source=md-export)

## Tags

`arduino`, `uno-r4`, `arm-cortex-m4`, `renesas`, `can-bus`, `dac`, `usb-c`

---
[View full device page](https://openhardware.directory/s/1370/arduino-uno-r4-minima)

---

# Arduino Nano Every

> Compact 45×18mm Arduino Nano with ATMega4809 at 20MHz — 48KB flash, 6KB SRAM, 5V logic, 14 digital I/O (5 PWM), 8 analog inputs, and USB-C. A modern, affordable 8-bit board for embedded projects and breadboard prototyping.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$10.5
- **CPU:** ATMega4809 @ 20MHz, 8-bit AVR
- **RAM:** 6KB SRAM
- **Flash:** 48KB
- **USB:** Micro-USB
- **Power:** 5V via Micro-USB or Vin
- **Dimensions:** 45 × 18mm

## Compatible Firmware

- arduino

## Components

- **ATMega4809** (mcu): Microchip ATMega4809 at 20MHz with 48KB flash, 6KB SRAM, and improved analog peripherals over ATmega328P. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FATmega4808-4809-Data-Sheet-DS40002173A.pdf&ref=openhardware.directory&product=arduino-nano-every&source=md-export)

## Protocols

- **SPI**: MOSI=D11, MISO=D12, SCK=D13, SS=D10
- **I2C**: SDA=A4, SCL=A5
- **UART**: TX=D1, RX=D0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX | — | digital-input, digital-output |
| D1 | UART TX | — | digital-input, digital-output |
| D2 | Digital I/O | — | digital-input, digital-output |
| D3 | PWM | — | digital-input, digital-output, pwm |
| D4 | Digital I/O | — | digital-input, digital-output |
| D5 | PWM | — | digital-input, digital-output, pwm |
| D6 | PWM | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output |
| D8 | Digital I/O | — | digital-input, digital-output |
| D9 | PWM | — | digital-input, digital-output, pwm |
| D10 | PWM / SPI SS | — | digital-input, digital-output, pwm |
| D11 | SPI MOSI | — | digital-input, digital-output |
| D12 | SPI MISO | — | digital-input, digital-output |
| D13 | SPI SCK / LED | — | digital-input, digital-output |
| A0 | Analog Input | — | digital-input, digital-output, adc |
| A1 | Analog Input | — | digital-input, digital-output, adc |
| A2 | Analog Input | — | digital-input, digital-output, adc |
| A3 | Analog Input | — | digital-input, digital-output, adc |
| A4 | I2C SDA / Analog | — | digital-input, digital-output, adc |
| A5 | I2C SCL / Analog | — | digital-input, digital-output, adc |
| A6 | Analog Input | — | adc |
| A7 | Analog Input | — | adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fnano-every&ref=openhardware.directory&product=arduino-nano-every&source=md-export) — $10.50
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnano-every&ref=openhardware.directory&product=arduino-nano-every&source=md-export) — €11.61
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FABX00028%2F10238801&ref=openhardware.directory&product=arduino-nano-every&source=md-export) — $13.80
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FABX00028&ref=openhardware.directory&product=arduino-nano-every&source=md-export) — $13.80
- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB07VX7MX27&ref=openhardware.directory&product=arduino-nano-every&source=md-export) — $14.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnano-every&ref=openhardware.directory&product=arduino-nano-every&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fnano-every%2F&ref=openhardware.directory&product=arduino-nano-every&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FABX00028-datasheet.pdf&ref=openhardware.directory&product=arduino-nano-every&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fschematics%2FABX00028-schematics.pdf&ref=openhardware.directory&product=arduino-nano-every&source=md-export)

## Tags

`arduino`, `nano`, `atmega4809`, `5v`, `breadboard`, `compact`

---
[View full device page](https://openhardware.directory/s/1370/arduino-nano-every)

---

# Arduino Uno Rev3

> The original Arduino UNO — the world's most popular development board with ATmega328P at 16MHz, 32KB flash, 2KB SRAM, 14 digital I/O (6 PWM), 6 analog inputs, USB-B, and 5V operation. The gateway to electronics and programming for millions.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$26.5
- **CPU:** ATmega328P @ 16MHz, 8-bit AVR
- **RAM:** 2KB SRAM
- **Flash:** 32KB
- **USB:** USB-B
- **Power:** 5V via USB-B or 7-12V via barrel jack
- **Dimensions:** 68.6 × 53.4mm

## Compatible Firmware

- arduino

## Components

- **ATmega328P** (mcu): Microchip ATmega328P 8-bit AVR at 16MHz with 32KB flash, 2KB SRAM, 1KB EEPROM, 6 ADC channels, and 6 PWM outputs in removable DIP-28 package. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf&ref=openhardware.directory&product=arduino-uno-rev3&source=md-export)

## Protocols

- **SPI**: MOSI=D11, MISO=D12, SCK=D13, SS=D10
- **I2C**: SDA=A4, SCL=A5
- **UART**: TX=D1, RX=D0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX | — | digital-input, digital-output |
| D1 | UART TX | — | digital-input, digital-output |
| D2 | Digital I/O / INT0 | — | digital-input, digital-output |
| D3 | PWM / INT1 | — | digital-input, digital-output, pwm |
| D4 | Digital I/O | — | digital-input, digital-output |
| D5 | PWM | — | digital-input, digital-output, pwm |
| D6 | PWM | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output |
| D8 | Digital I/O | — | digital-input, digital-output |
| D9 | PWM | — | digital-input, digital-output, pwm |
| D10 | PWM / SPI SS | — | digital-input, digital-output, pwm |
| D11 | PWM / SPI MOSI | — | digital-input, digital-output, pwm |
| D12 | SPI MISO | — | digital-input, digital-output |
| D13 | SPI SCK / LED | — | digital-input, digital-output |
| A0 | Analog Input | — | digital-input, digital-output, adc |
| A1 | Analog Input | — | digital-input, digital-output, adc |
| A2 | Analog Input | — | digital-input, digital-output, adc |
| A3 | Analog Input | — | digital-input, digital-output, adc |
| A4 | I2C SDA / Analog | — | digital-input, digital-output, adc |
| A5 | I2C SCL / Analog | — | digital-input, digital-output, adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Farduino-uno-rev3&ref=openhardware.directory&product=arduino-uno-rev3&source=md-export) — $26.50
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Farduino-uno-rev3&ref=openhardware.directory&product=arduino-uno-rev3&source=md-export) — €29.30
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FA000066%2F2784006&ref=openhardware.directory&product=arduino-uno-rev3&source=md-export) — $27.60
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FA000066&ref=openhardware.directory&product=arduino-uno-rev3&source=md-export) — $27.60
- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB008GRTSV6&ref=openhardware.directory&product=arduino-uno-rev3&source=md-export) — $27.60
- [SparkFun](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sparkfun.com%2Farduino-uno-r3.html&ref=openhardware.directory&product=arduino-uno-rev3&source=md-export) — $27.95
- [The Pi Hut (UK)](https://openhardware.directory/r?to=https%3A%2F%2Fthepihut.com%2Fproducts%2Farduino-uno-rev3&ref=openhardware.directory&product=arduino-uno-rev3&source=md-export) — £20.00
- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F50&ref=openhardware.directory&product=arduino-uno-rev3&source=md-export) — $27.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Farduino-uno-rev3&ref=openhardware.directory&product=arduino-uno-rev3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Funo-rev3%2F&ref=openhardware.directory&product=arduino-uno-rev3&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FA000066-datasheet.pdf&ref=openhardware.directory&product=arduino-uno-rev3&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fschematics%2FA000066-schematics.pdf&ref=openhardware.directory&product=arduino-uno-rev3&source=md-export)

## Tags

`arduino`, `uno`, `atmega328p`, `classic`, `beginner`, `5v`

---
[View full device page](https://openhardware.directory/s/1370/arduino-uno-rev3)

---

# Arduino Nano

> The classic breadboard-friendly Arduino — ATmega328P at 16MHz, 32KB flash, 2KB SRAM, 14 digital I/O (6 PWM), 8 analog inputs, Mini-B USB, and 5V operation in a tiny 45×18mm form factor. The compact original.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$19.7
- **CPU:** ATmega328P @ 16MHz, 8-bit AVR
- **RAM:** 2KB SRAM
- **Flash:** 32KB
- **USB:** Mini-B USB
- **Power:** 5V via Mini-B USB or 6-20V via Vin
- **Dimensions:** 45 × 18mm

## Compatible Firmware

- arduino

## Components

- **ATmega328P** (mcu): Microchip ATmega328P 8-bit AVR at 16MHz with 32KB flash, 2KB SRAM, 1KB EEPROM, and 8 ADC channels. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf&ref=openhardware.directory&product=arduino-nano&source=md-export)

## Protocols

- **SPI**: MOSI=D11, MISO=D12, SCK=D13, SS=D10
- **I2C**: SDA=A4, SCL=A5
- **UART**: TX=D1, RX=D0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX | — | digital-input, digital-output |
| D1 | UART TX | — | digital-input, digital-output |
| D2 | Digital I/O / INT0 | — | digital-input, digital-output |
| D3 | PWM / INT1 | — | digital-input, digital-output, pwm |
| D4 | Digital I/O | — | digital-input, digital-output |
| D5 | PWM | — | digital-input, digital-output, pwm |
| D6 | PWM | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output |
| D8 | Digital I/O | — | digital-input, digital-output |
| D9 | PWM | — | digital-input, digital-output, pwm |
| D10 | PWM / SPI SS | — | digital-input, digital-output, pwm |
| D11 | PWM / SPI MOSI | — | digital-input, digital-output, pwm |
| D12 | SPI MISO | — | digital-input, digital-output |
| D13 | SPI SCK / LED | — | digital-input, digital-output |
| A0 | Analog Input | — | digital-input, digital-output, adc |
| A1 | Analog Input | — | digital-input, digital-output, adc |
| A2 | Analog Input | — | digital-input, digital-output, adc |
| A3 | Analog Input | — | digital-input, digital-output, adc |
| A4 | I2C SDA / Analog | — | digital-input, digital-output, adc |
| A5 | I2C SCL / Analog | — | digital-input, digital-output, adc |
| A6 | Analog Input (only) | — | adc |
| A7 | Analog Input (only) | — | adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Farduino-nano&ref=openhardware.directory&product=arduino-nano&source=md-export) — $19.70
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Farduino-nano&ref=openhardware.directory&product=arduino-nano&source=md-export) — €21.76
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FA000005%2F2638989&ref=openhardware.directory&product=arduino-nano&source=md-export) — $22.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FA000005&ref=openhardware.directory&product=arduino-nano&source=md-export) — $22.00
- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB0097AU5OU&ref=openhardware.directory&product=arduino-nano&source=md-export) — $22.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Farduino-nano&ref=openhardware.directory&product=arduino-nano&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fnano%2F&ref=openhardware.directory&product=arduino-nano&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FA000005-datasheet.pdf&ref=openhardware.directory&product=arduino-nano&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fschematics%2FA000005-schematics.pdf&ref=openhardware.directory&product=arduino-nano&source=md-export)

## Tags

`arduino`, `nano`, `atmega328p`, `classic`, `breadboard`, `compact`, `5v`

---
[View full device page](https://openhardware.directory/s/1370/arduino-nano)

---

# Arduino Stella

> Arduino's Ultra-Wideband (UWB) board with nRF52840 ARM Cortex-M4F, Truesense DCU040 UWB module, BLE 5.0, and NFC — enabling centimeter-accurate indoor positioning, asset tracking, and secure proximity interactions.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$76.5
- **CPU:** ARM Cortex-M4F @ 64MHz, FPU, DSP
- **RAM:** 256KB SRAM
- **Flash:** 1MB
- **USB:** USB-C
- **Power:** 5V
- **Dimensions:** 68.85 × 53.34mm

## Connectivity

Bluetooth BLE 5.0

## Compatible Firmware

- arduino

## Components

- **nRF52840** (mcu): Nordic nRF52840 at 64MHz with 1MB flash, 256KB RAM, BLE 5.0, Thread, Zigbee, and NFC-A tag emulation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52840_PS_v1.1.pdf&ref=openhardware.directory&product=arduino-stella&source=md-export)
- **DCU040** (sensor): Truesense DCU040 UWB module for centimeter-accurate indoor positioning, ranging, and secure proximity detection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.truesense.com%2Fproducts%2Fdcu040&ref=openhardware.directory&product=arduino-stella&source=md-export)

## Protocols

- **SPI**: MOSI=D11, MISO=D12, SCK=D13
- **I2C**: SDA=A4, SCL=A5
- **UART**: TX=D1, RX=D0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX | — | digital-input, digital-output |
| D1 | UART TX | — | digital-input, digital-output |
| D2 | Digital I/O | — | digital-input, digital-output, pwm |
| D3 | Digital I/O | — | digital-input, digital-output, pwm |
| D4 | Digital I/O | — | digital-input, digital-output, pwm |
| D5 | Digital I/O | — | digital-input, digital-output, pwm |
| D6 | Digital I/O | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output, pwm |
| D8 | Digital I/O | — | digital-input, digital-output, pwm |
| D9 | Digital I/O | — | digital-input, digital-output, pwm |
| D10 | Digital I/O | — | digital-input, digital-output, pwm |
| D11 | SPI MOSI | — | digital-input, digital-output, pwm |
| D12 | SPI MISO | — | digital-input, digital-output, pwm |
| D13 | SPI SCK | — | digital-input, digital-output, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fstella&ref=openhardware.directory&product=arduino-stella&source=md-export) — $76.50
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fstella&ref=openhardware.directory&product=arduino-stella&source=md-export) — €84.20

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fstella&ref=openhardware.directory&product=arduino-stella&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fstella%2F&ref=openhardware.directory&product=arduino-stella&source=md-export)

## Tags

`arduino`, `uwb`, `ultra-wideband`, `nrf52840`, `ble`, `indoor-positioning`, `asset-tracking`, `nfc`

---
[View full device page](https://openhardware.directory/s/1370/arduino-stella)

---

# Arduino Portenta C33

> Cost-effective Portenta module with Renesas RA6M5 ARM Cortex-M33 at 200MHz, 2MB flash, 512KB SRAM, WiFi/BLE, hardware security, and Portenta/MKR compatibility — bringing industrial IoT capabilities at a fraction of the X8 price.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** compute-module
- **Price:** ~$50
- **CPU:** ARM Cortex-M33 @ 200MHz, FPU, TrustZone
- **RAM:** 512KB SRAM
- **Flash:** 2MB
- **USB:** USB-C
- **Power:** 5V
- **Dimensions:** 66.04 × 25.4mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0

## Compatible Firmware

- arduino
- micropython

## Components

- **R7FA6M5BH** (mcu): Renesas RA6M5 ARM Cortex-M33 at 200MHz with FPU, TrustZone, 2MB flash, 512KB SRAM, and Ethernet MAC. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.renesas.com%2Fen%2Fdocument%2Fdst%2Fra6m5-group-datasheet&ref=openhardware.directory&product=arduino-portenta-c33&source=md-export)

## Protocols

- **SPI**: notes=Via high-density connectors
- **I2C**: notes=Via high-density connectors
- **UART**: notes=Via high-density connectors
- **Ethernet**: notes=Via carrier board

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Digital I/O | — | digital-input, digital-output, pwm |
| GPIO1 | Digital I/O | — | digital-input, digital-output, pwm |
| GPIO2 | Digital I/O | — | digital-input, digital-output, pwm |
| GPIO3 | Digital I/O | — | digital-input, digital-output, pwm |
| A0 | Analog Input | — | adc |
| A1 | Analog Input | — | adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fportenta-c33&ref=openhardware.directory&product=arduino-portenta-c33&source=md-export) — $50.00
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fportenta-c33&ref=openhardware.directory&product=arduino-portenta-c33&source=md-export) — €55.30
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FABX00074%2F19090781&ref=openhardware.directory&product=arduino-portenta-c33&source=md-export) — $55.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FABX00074&ref=openhardware.directory&product=arduino-portenta-c33&source=md-export) — $55.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fportenta-c33&ref=openhardware.directory&product=arduino-portenta-c33&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fportenta-c33%2F&ref=openhardware.directory&product=arduino-portenta-c33&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FABX00074-datasheet.pdf&ref=openhardware.directory&product=arduino-portenta-c33&source=md-export)

## Tags

`arduino`, `portenta`, `renesas`, `cortex-m33`, `wifi`, `ble`, `industrial`

---
[View full device page](https://openhardware.directory/s/1370/arduino-portenta-c33)

---

# Arduino Nicla Sense ME

> Compact 22.86mm sensor module with nRF52840 BLE 5.0 and four Bosch sensors — 9-axis IMU with AI, barometric pressure, temperature/humidity, and gas/CO2 detection. Edge AI-powered environmental and motion sensing in a coin-sized package.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** module
- **Price:** ~$50
- **CPU:** ARM Cortex-M4F @ 64MHz, FPU, DSP
- **RAM:** 256KB SRAM
- **Flash:** 1MB
- **USB:** Micro-USB
- **Power:** 3.3V via Micro-USB or battery
- **Dimensions:** 22.86 × 22.86mm

## Connectivity

Bluetooth BLE 5.0

## Compatible Firmware

- arduino

## Components

- **nRF52840** (mcu): Nordic nRF52840 at 64MHz handling BLE communication and application logic. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52840_PS_v1.1.pdf&ref=openhardware.directory&product=arduino-nicla-sense-me&source=md-export)
- **BHI260AP** (accelerometer): Bosch BHI260AP self-learning AI smart sensor with 6-axis IMU and programmable neural network accelerator. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bhi260ap-ds000.pdf&ref=openhardware.directory&product=arduino-nicla-sense-me&source=md-export)
- **BME688** (sensor): Bosch BME688 measuring temperature, humidity, barometric pressure, and gas resistance for air quality and CO2 estimation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bme688-ds000.pdf&ref=openhardware.directory&product=arduino-nicla-sense-me&source=md-export)
- **BMP390** (sensor): Bosch BMP390 barometric pressure sensor with ±0.3hPa accuracy for altitude tracking. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bmp390-ds002.pdf&ref=openhardware.directory&product=arduino-nicla-sense-me&source=md-export)

## Protocols

- **SPI**: notes=Via castellated pads
- **I2C**: notes=Via castellated pads

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Digital I/O | — | digital-input, digital-output |
| GPIO1 | Digital I/O | — | digital-input, digital-output |
| GPIO2 | Digital I/O | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fnicla-sense-me&ref=openhardware.directory&product=arduino-nicla-sense-me&source=md-export) — $50.00
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnicla-sense-me&ref=openhardware.directory&product=arduino-nicla-sense-me&source=md-export) — €55.30
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FABX00050%2F16733928&ref=openhardware.directory&product=arduino-nicla-sense-me&source=md-export) — $55.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FABX00050&ref=openhardware.directory&product=arduino-nicla-sense-me&source=md-export) — $55.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnicla-sense-me&ref=openhardware.directory&product=arduino-nicla-sense-me&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fnicla-sense-me%2F&ref=openhardware.directory&product=arduino-nicla-sense-me&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FABX00050-datasheet.pdf&ref=openhardware.directory&product=arduino-nicla-sense-me&source=md-export)

## Tags

`arduino`, `nicla`, `sensors`, `imu`, `air-quality`, `ble`, `bosch`, `environmental`

---
[View full device page](https://openhardware.directory/s/1370/arduino-nicla-sense-me)

---

# NanoPi R6S

> High-performance RK3588S router board with 8GB LPDDR4X, 32GB eMMC, native Gigabit + dual 2.5GbE, HDMI 2.1 (8K), USB 3.0, and 6 TOPS NPU — ideal for OpenWrt/FriendlyWrt router, NAS, and edge computing.

## Quick Facts

- **Brand:** FriendlyElec
- **Board Type:** sbc
- **Price:** ~$167
- **CPU:** ARM Cortex-A76 4x2.4GHz,Cortex-A53 4x1.8GHz, RK3588S
- **RAM:** 8GB LPDDR4X
- **Flash:** 32GB eMMC
- **USB:** USB 3.0,USB 2.0,USB-C PD
- **Power:** USB-C PD (5-20V)
- **Dimensions:** 62 × 90mm

## Connectivity

Ethernet 1x Gigabit, 2x 2.5 Gigabit

## Compatible Firmware

- arduino

## Components

- **RK3588S** (mcu): Rockchip RK3588S with 4x Cortex-A76 + 4x Cortex-A53, Mali-G610 MP4, 6 TOPS NPU, 8K video. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fuploads%2Fpdf%2F2022.8.26%2F192%2FRK3588%2520Brief%2520Datasheet.pdf&ref=openhardware.directory&product=nanopi-r6s&source=md-export)
- **RTL8125BG** (ethernet-phy): Realtek RTL8125BG PCIe 2.5 Gigabit Ethernet controllers providing two high-speed network ports. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.realtek.com%2Fen%2Fcomponent%2Fzoo%2Fcategory%2Fnetwork-interface-controllers-10-100-1000m-gigabit-ethernet-pci-express-software&ref=openhardware.directory&product=nanopi-r6s&source=md-export)

## Protocols

- **UART**: notes=Debug UART 3-pin header + GPIO FPC
- **SPI**: notes=Via 12-pin FPC connector
- **PCIe**: notes=Internal for 2.5GbE controllers

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | UART/SPI via FPC | — | digital-input, digital-output |
| GPIO2 | UART/SPI via FPC | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D289&ref=openhardware.directory&product=nanopi-r6s&source=md-export) — $167.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D289&ref=openhardware.directory&product=nanopi-r6s&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_R6S&ref=openhardware.directory&product=nanopi-r6s&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ffriendlyarm%2Fsd-fuse_rk3588&ref=openhardware.directory&product=nanopi-r6s&source=md-export)

## Tags

`friendlyelec`, `nanopi`, `rk3588s`, `router`, `2.5gbe`, `openwrt`, `npu`

---
[View full device page](https://openhardware.directory/s/1370/nanopi-r6s)

---

# NanoPi R4S

> Popular RK3399 dual-GbE router board with 2x Cortex-A72 + 4x Cortex-A53, 4GB LPDDR4, dual Gigabit Ethernet, 2x USB 3.0, metal case option, and OpenWrt/FriendlyWrt support — the go-to affordable open-source router platform.

## Quick Facts

- **Brand:** FriendlyElec
- **Board Type:** sbc
- **Price:** ~$55
- **CPU:** ARM Cortex-A72 2x2.0GHz,Cortex-A53 4x1.5GHz, RK3399
- **RAM:** 4GB LPDDR4
- **Flash:** none (microSD boot)
- **USB:** 2x USB 3.0 Type-A,USB-C (power)
- **Power:** 5V/3A via USB-C
- **Dimensions:** 66 × 66mm

## Connectivity

Ethernet 2x Gigabit

## Compatible Firmware

- arduino

## Components

- **RK3399** (mcu): Rockchip RK3399 with 2x Cortex-A72 at 2.0GHz + 4x Cortex-A53 at 1.5GHz, Mali-T864 GPU, 4K video. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fopensource.rock-chips.com%2Fimages%2F6%2F60%2FRockchip_RK3399_Datasheet_V2.1-20200323.pdf&ref=openhardware.directory&product=nanopi-r4s&source=md-export)

## Protocols

- **I2C**: notes=Via 10-pin GPIO header
- **SPI**: notes=Via 10-pin GPIO header
- **UART**: notes=Debug UART 3-pin header

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | I2C SDA | — | digital-input, digital-output |
| GPIO2 | I2C SCL | — | digital-input, digital-output |
| GPIO3 | SPI CLK | — | digital-input, digital-output |
| GPIO4 | SPI MOSI | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D284&ref=openhardware.directory&product=nanopi-r4s&source=md-export) — $55.00
- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB09FH22SGP&ref=openhardware.directory&product=nanopi-r4s&source=md-export) — $65.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D284&ref=openhardware.directory&product=nanopi-r4s&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_R4S&ref=openhardware.directory&product=nanopi-r4s&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ffriendlyarm%2Fsd-fuse_rk3399&ref=openhardware.directory&product=nanopi-r4s&source=md-export)

## Tags

`friendlyelec`, `nanopi`, `rk3399`, `router`, `openwrt`, `dual-gbe`

---
[View full device page](https://openhardware.directory/s/1370/nanopi-r4s)

---

# Milk-V Pioneer

> 64-core RISC-V workstation mATX motherboard with SOPHON SG2042 @ 2GHz, up to 128GB DDR4 ECC, PCIe 4.0 x16, 5x SATA, 8x USB 3.0, dual 2.5GbE for native RISC-V development.

## Quick Facts

- **Brand:** Milk-V
- **Board Type:** mATX Motherboard
- **CPU:** SOPHON SG2042
- **RAM:** Up to 128GB DDR4 ECC
- **Flash:** SPI Flash (BIOS)
- **USB:** 8x USB 3.0
- **Power:** ATX 24-pin (120W typical)

## Connectivity

Ethernet 2x 2.5GbE

## Components

- **SOPHON SG2042** (Processor): 64 C920 RISC-V cores at up to 2GHz with RVV 0.71 vector extensions, 64KB L1 I+D cache, 1MB L2 per cluster, and 64MB shared L3 system cache — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fraw.githubusercontent.com%2Fmilkv-pioneer%2Fpioneer-files%2Fmain%2Fhardware%2FSG2042-TRM.pdf&ref=openhardware.directory&product=milk-v-pioneer&source=md-export)

## Protocols

- **PCIe 4.0**
- **SATA 6Gbps**
- **NVMe**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Crowd Supply](https://openhardware.directory/r?to=https%3A%2F%2Fwww.crowdsupply.com%2Fmilkv%2Fmilk-v-pioneer&ref=openhardware.directory&product=milk-v-pioneer&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fmilkv.io%2Fpioneer&ref=openhardware.directory&product=milk-v-pioneer&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fmilkv-pioneer&ref=openhardware.directory&product=milk-v-pioneer&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fraw.githubusercontent.com%2Fmilkv-pioneer%2Fpioneer-files%2Fmain%2Fhardware%2FSG2042-TRM.pdf&ref=openhardware.directory&product=milk-v-pioneer&source=md-export)

## Tags

`risc-v`, `workstation`, `server`, `linux`, `sophon`, `milkv`, `matx`, `64-core`

---
[View full device page](https://openhardware.directory/s/1370/milk-v-pioneer)

---

# Milk-V Titan

> Mini-ITX RISC-V board with octa-core UltraRISC UR-DP1000 @ 2GHz, up to 64GB DDR4 ECC, PCIe Gen4 x16, onboard BMC, hardware virtualization. RVA22 compliant, FCC/CE certified.

## Quick Facts

- **Brand:** Milk-V
- **Board Type:** Mini-ITX
- **CPU:** UltraRISC UR-DP1000
- **RAM:** Up to 64GB DDR4 ECC
- **Flash:** SPI Flash (UEFI)
- **USB:** 4x USB 3.0
- **Power:** 12V DC,ATX 24-pin

## Connectivity

Ethernet 1GbE, 100Mbps BMC

## Components

- **UltraRISC UR-DP1000** (Processor): Eight UR-CP100 cores (RV64GCBHX) at up to 2GHz, first Hypervisor Extension 1.0 compliant silicon, dual 4-core clusters with 4MB L3 each and 16MB shared SLC — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fmilkv.io%2Ftitan&ref=openhardware.directory&product=milk-v-titan&source=md-export)
- **BMC** (Controller): Onboard BMC with dedicated 100Mbps Ethernet for remote server management, monitoring, and out-of-band access — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fmilkv.io%2Ftitan&ref=openhardware.directory&product=milk-v-titan&source=md-export)

## Protocols

- **PCIe Gen4**
- **NVMe**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fmilkv.io%2Ftitan&ref=openhardware.directory&product=milk-v-titan&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fmilkv-titan&ref=openhardware.directory&product=milk-v-titan&source=md-export)

## Tags

`risc-v`, `mini-itx`, `linux`, `server`, `virtualization`, `milkv`, `rva22`, `bmc`

## Certifications

FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/milk-v-titan)

---

# M5Stack Atom Lite

> Ultra-compact ESP32-PICO-D4 development board (24x24mm) with RGB LED, programmable button, IR transmitter, Grove port, and 6 GPIO pins. Supports Arduino, ESP-IDF, UIFlow, and MicroPython.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$7.5
- **CPU:** Xtensa LX6 dual-core @ 240MHz
- **RAM:** 520KB SRAM
- **Flash:** 4MB SPI
- **USB:** USB-C
- **Power:** 5V @ 500mA via USB-C
- **Dimensions:** 24 × 24 × 9.5mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino
- esp-idf
- uiflow
- micropython
- platformio

## Components

- **ESP32-PICO-D4** (mcu): Espressif ESP32-PICO-D4 system-in-package with dual-core Xtensa LX6 at 240MHz, 4MB flash, WiFi 802.11 b/g/n and Bluetooth 4.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-pico-d4_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-atom-lite&source=md-export)
- **SK6812** (led): SK6812 programmable RGB LED for status indication and visual feedback. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F1138%2FSK6812%2BLED%2Bdatasheet%2B.pdf&ref=openhardware.directory&product=m5stack-atom-lite&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **Grove**
- **IR**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| G19 | — | — | — |
| G21 | — | — | — |
| G22 | — | — | — |
| G23 | — | — | — |
| G25 | — | — | — |
| G33 | — | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stackatomliteesp32&ref=openhardware.directory&product=m5stack-atom-lite&source=md-export) — €9.95
- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fatom-lite-esp32-development-kit&ref=openhardware.directory&product=m5stack-atom-lite&source=md-export) — $7.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FATOM%2520Lite&ref=openhardware.directory&product=m5stack-atom-lite&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5Atom&ref=openhardware.directory&product=m5stack-atom-lite&source=md-export)

## Tags

`esp32`, `m5stack`, `atom`, `compact`, `grove`, `ir-transmitter`, `iot`, `rgb-led`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-atom-lite)

---

# ADS1115 16-Bit ADC Module

> 16-bit 4-channel analog-to-digital converter module with programmable gain amplifier (PGA, up to 16x). I2C interface, 860 SPS max. Ideal for precision analog measurements.

## Quick Facts

- **Brand:** Generic
- **Board Type:** sensor-module
- **Price:** ~$6.99
- **CPU:** None (passive ADC module, connects to host MCU)
- **RAM:** None
- **Flash:** none
- **Power:** 2V–5.5V via pin header

## Components

- **Texas Instruments ADS1115**: Ultra-small 16-bit precision analog-to-digital converter with internal programmable gain amplifier and I2C interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fads1115.pdf&ref=openhardware.directory&product=ads1115-16bit-adc-module&source=md-export)

## Protocols

- **undefined**

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fads1115-adc-module&ref=openhardware.directory&product=ads1115-16bit-adc-module&source=md-export) — $6.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fads1115-adc-module&ref=openhardware.directory&product=ads1115-16bit-adc-module&source=md-export)

## Tags

`ads1115`, `adc`, `16-bit`, `analog-to-digital`, `pga`, `i2c`, `texas-instruments`, `data-acquisition`

---
[View full device page](https://openhardware.directory/s/1370/ads1115-16bit-adc-module)

---

# Orange Pi PC 2

> The Orange Pi PC 2 is a 64-bit single-board computer based on the Allwinner H5 quad-core Cortex-A53 SoC with 1GB DDR3 RAM and Gigabit Ethernet, offering a cost-effective ARM64 Linux platform for makers and hobbyists.

## Quick Facts

- **Brand:** Xunlong
- **Price:** ~$20
- **CPU:** Allwinner H5 — 4x Cortex-A53 @ 1.368GHz, Mali-450 GPU
- **RAM:** 1GB DDR3
- **Flash:** SPI flash (bootloader) + microSD
- **USB:** 2x USB 2.0 Host
- **Power:** DC 5V/2A barrel jack

## Connectivity

Ethernet Gigabit Ethernet

## Components

- **Allwinner H5** (soc): Quad-core Cortex-A53 64-bit SoC with Mali-450 GPU, successor to the Allwinner H3 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flinux-sunxi.org%2FH5&ref=openhardware.directory&product=orange-pi-pc-2&source=md-export)

## Where to Buy

- [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fstore%2F1553371&ref=openhardware.directory&product=orange-pi-pc-2&source=md-export) — 20.00

## Links

- [product](https://openhardware.directory/r?to=http%3A%2F%2Fwww.orangepi.org%2Fhtml%2FhardWare%2FcomputerAndMicrocontrollers%2Fdetails%2FOrange-Pi-PC-2.html&ref=openhardware.directory&product=orange-pi-pc-2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Forange-pi-pc2%2F&ref=openhardware.directory&product=orange-pi-pc-2&source=md-export)

## Tags

`sbc`, `linux`, `allwinner`, `h5`, `arm64`, `gigabit-ethernet`, `budget`, `armbian`

---
[View full device page](https://openhardware.directory/s/1370/orange-pi-pc-2)

---

# FeatherS3[D] ESP32-S3 by Unexpected Maker

> The FeatherS3[D] is Unexpected Maker's Feather-form ESP32-S3 board with a dual antenna system (onboard + u.FL, software-switchable), I2C battery fuel gauge, 16MB flash, 8MB PSRAM, two STEMMA QT connectors, and LiPo charging — all in the standard Adafruit Feather footprint.

## Quick Facts

- **Brand:** Unexpected Maker
- **Board Type:** ESP32-S3
- **Price:** ~$24.95
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM + 8MB PSRAM
- **Flash:** 16MB
- **USB:** USB-C (native USB + USB Serial JTAG)
- **Power:** USB-C 5V or LiPo battery

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth Bluetooth 5 LE + Mesh

## Compatible Firmware

- circuitpython
- micropython
- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Dual-core Xtensa LX7 at 240MHz with AI vector extensions, WiFi 802.11 b/g/n, Bluetooth 5 LE+Mesh, and native USB OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=feathers3d-esp32-s3&source=md-export)
- **8MB PSRAM** (memory): External 8MB QSPI pseudo-static RAM for expanded working memory and large library support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=feathers3d-esp32-s3&source=md-export)
- **I2C Battery Fuel Gauge** (sensor): Dedicated I2C fuel gauge IC for accurate LiPo battery state-of-charge monitoring. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fesp32s3.com%2Ffeathers3.html&ref=openhardware.directory&product=feathers3d-esp32-s3&source=md-export)
- **RF Switch** (chip): Software-controlled RF switch allowing runtime selection between the onboard PCB antenna and the u.FL external antenna connector. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fesp32s3.com%2Ffeathers3.html&ref=openhardware.directory&product=feathers3d-esp32-s3&source=md-export)
- **RGB LED** (led): Built-in addressable RGB LED for status indication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=feathers3d-esp32-s3&source=md-export)

## Protocols

- **I2C**: SDA=GPIO15, SCL=GPIO16
- **SPI**: MOSI=GPIO7, MISO=GPIO3, SCK=GPIO6
- **UART**: TX=GPIO1, RX=GPIO2
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | TX | — | uart-tx, digital |
| GPIO2 | RX | — | uart-rx, digital |
| GPIO3 | MISO | — | spi-miso, digital |
| GPIO4 | A4 | — | analog, digital |
| GPIO5 | A5 | — | analog, digital |
| GPIO6 | SCK | — | spi-sck, digital |
| GPIO7 | MOSI | — | spi-mosi, digital |
| GPIO8 | D5 | — | digital |
| GPIO9 | D6 | — | digital |
| GPIO10 | D9 | — | digital |
| GPIO11 | D10 | — | digital |
| GPIO12 | D11 | — | digital |
| GPIO13 | D12 | — | digital |
| GPIO14 | D13 | — | digital |
| GPIO15 | SDA | — | i2c-sda, digital |
| GPIO16 | SCL | — | i2c-scl, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6399&ref=openhardware.directory&product=feathers3d-esp32-s3&source=md-export) — $24.95

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Funexpectedmaker_feathers3%2F&ref=openhardware.directory&product=feathers3d-esp32-s3&source=md-export)
- [Getting Started Guide](https://openhardware.directory/r?to=https%3A%2F%2Fesp32s3.com%2Ffeathers3.html&ref=openhardware.directory&product=feathers3d-esp32-s3&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6399&ref=openhardware.directory&product=feathers3d-esp32-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Funexpectedmaker%2Fesp32s3&ref=openhardware.directory&product=feathers3d-esp32-s3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fesp32s3.com%2Ffeathers3.html&ref=openhardware.directory&product=feathers3d-esp32-s3&source=md-export)

## Tags

`unexpected-maker`, `esp32-s3`, `feathers3`, `feather`, `dual-antenna`, `psram`, `circuitpython`, `wifi`, `ble`, `ufl`

## Certifications

CE, FCC, RoHS

---
[View full device page](https://openhardware.directory/s/1370/feathers3d-esp32-s3)

---

# TinyS3[D] ESP32-S3 by Unexpected Maker

> The TinyS3[D] is Unexpected Maker's ultra-compact ESP32-S3 board in the TinyPICO form factor, featuring a dual antenna system (onboard + u.FL, software-switchable), I2C battery fuel gauge, 8MB flash, 8MB PSRAM, LiPo charging, and 17 GPIO pins — all in a tiny castellated module.

## Quick Facts

- **Brand:** Unexpected Maker
- **Board Type:** ESP32-S3
- **Price:** ~$21.5
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector extensions, HW crypto (AES/SHA/RSA)
- **RAM:** 512KB SRAM + 8MB PSRAM
- **Flash:** 8MB
- **USB:** USB-C (native USB + USB Serial JTAG)
- **Power:** USB-C 5V or LiPo battery

## Connectivity

WiFi 2.4GHz 802.11 b/g/n | Bluetooth BLE 5.3

## Compatible Firmware

- circuitpython
- micropython
- arduino
- esp-idf

## Components

- **ESP32-S3** (mcu): Dual-core Xtensa LX7 at 240MHz with AI vector extensions, WiFi 802.11 b/g/n, Bluetooth 5 LE, and native USB OTG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=tinys3d-esp32-s3&source=md-export)
- **8MB PSRAM** (memory): External 8MB QSPI pseudo-static RAM providing expanded dynamic memory in an ultra-compact form factor. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=tinys3d-esp32-s3&source=md-export)
- **I2C Battery Fuel Gauge** (sensor): Dedicated I2C fuel gauge IC for accurate LiPo battery state-of-charge monitoring in portable applications. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fesp32s3.com%2Ftinys3.html&ref=openhardware.directory&product=tinys3d-esp32-s3&source=md-export)
- **RF Switch** (chip): Software-controlled RF switch for runtime selection between onboard antenna and u.FL external antenna. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fesp32s3.com%2Ftinys3.html&ref=openhardware.directory&product=tinys3d-esp32-s3&source=md-export)
- **Low-power RGB LED** (led): Ultra-low current RGB LED for status indication, visible even in deep-sleep modes with minimal power overhead. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fesp32s3.com%2Ftinys3.html&ref=openhardware.directory&product=tinys3d-esp32-s3&source=md-export)

## Protocols

- **I2C**: SDA=GPIO21, SCL=GPIO22
- **SPI**: MOSI=GPIO34, MISO=GPIO35, SCK=GPIO36, CS=GPIO37
- **UART**: TX=GPIO43, RX=GPIO44
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | ADC1_CH0 | — | analog, digital |
| GPIO2 | ADC1_CH1 | — | analog, digital |
| GPIO3 | ADC1_CH2 | — | analog, digital |
| GPIO5 | GPIO5 | — | digital |
| GPIO6 | GPIO6 | — | digital |
| GPIO7 | GPIO7 | — | digital |
| GPIO8 | GPIO8 | — | digital |
| GPIO9 | GPIO9 | — | digital |
| GPIO21 | SDA | — | i2c-sda, digital |
| GPIO22 | SCL | — | i2c-scl, digital |
| GPIO34 | MOSI | — | spi-mosi, digital |
| GPIO35 | MISO | — | spi-miso, digital |
| GPIO36 | SCK | — | spi-sck, digital |
| GPIO37 | CS | — | spi-cs, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6401&ref=openhardware.directory&product=tinys3d-esp32-s3&source=md-export) — $21.50

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Funexpectedmaker_tinys3%2F&ref=openhardware.directory&product=tinys3d-esp32-s3&source=md-export)
- [Getting Started Guide](https://openhardware.directory/r?to=https%3A%2F%2Fesp32s3.com%2Ftinys3.html&ref=openhardware.directory&product=tinys3d-esp32-s3&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6401&ref=openhardware.directory&product=tinys3d-esp32-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Funexpectedmaker%2Fesp32s3&ref=openhardware.directory&product=tinys3d-esp32-s3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fesp32s3.com%2Ftinys3.html&ref=openhardware.directory&product=tinys3d-esp32-s3&source=md-export)

## Tags

`unexpected-maker`, `esp32-s3`, `tinys3`, `tiny`, `psram`, `dual-antenna`, `circuitpython`, `wifi`, `ble`, `ufl`, `wearable`

## Certifications

CE, FCC, RoHS

---
[View full device page](https://openhardware.directory/s/1370/tinys3d-esp32-s3)

---

# BeagleV-Ahead

> Open-source RISC-V single board computer with Alibaba T-Head TH1520 quad-core Xuantie C910 at 2GHz, 4 TOPS NPU, 4GB LPDDR4, 16GB eMMC, WiFi/Bluetooth, Gigabit Ethernet, micro-HDMI, and BeagleBone cape headers.

## Quick Facts

- **Brand:** BeagleBoard
- **Board Type:** Single Board Computer
- **Price:** ~$149
- **CPU:** T-Head TH1520 (Quad Xuantie C910 RISC-V @ 2 GHz)
- **RAM:** 4GB LPDDR4
- **Flash:** 16GB eMMC
- **GPIO:** mikroBUS shuttle + BeagleBone cape headers pins
- **USB:** microUSB 3.0 OTG
- **Power:** 5V via microUSB 3.0

## Connectivity

WiFi 802.11ac (2.4/5GHz) | Bluetooth true | Ethernet Gigabit Ethernet

## Compatible Firmware

- Ubuntu Linux
- Yocto Linux

## Components

- **TH1520** (processor): Alibaba T-Head TH1520 SoC with quad-core 64-bit RISC-V Xuantie C910 at 2GHz, 3-issue 8-execution superscalar, out-of-order pipeline, 64KB I/D L1 per core, 1MB shared L2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.t-head.cn%2Fproduct%2FTH1520&ref=openhardware.directory&product=beaglev-ahead&source=md-export)
- **Imagination BXM-4-64** (gpu): Imagination Technologies GPU delivering 50 GFLOPS and 3 Mpixel/s for display and graphics acceleration — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.imaginationtech.com%2Fgpu%2Fimg-b-series%2F&ref=openhardware.directory&product=beaglev-ahead&source=md-export)
- **NPU** (npu): Dedicated 4 TOPS INT8 neural processing unit at 1GHz for AI inference and machine learning workloads — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.t-head.cn%2Fproduct%2FTH1520&ref=openhardware.directory&product=beaglev-ahead&source=md-export)
- **AP6203BM** (wireless): Dual-band 2.4GHz and 5GHz WiFi with Bluetooth combo module — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ampak.com.tw%2Fen%2Fproduct.aspx%3Fsn%3D1&ref=openhardware.directory&product=beaglev-ahead&source=md-export)
- **RTL8211F-VD-CG** (ethernet-phy): Realtek RTL8211F-VD-CG Gigabit Ethernet PHY with integrated magnetics RJ-45 connector — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.realtek.com%2Fen%2Fcomponent%2Fzoo%2Fcategory%2Frtl8211f-i-cg&ref=openhardware.directory&product=beaglev-ahead&source=md-export)
- **DA9063** (pmic): Dialog Semiconductor DA9063 PMIC providing complete power management for the SBC — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.renesas.com%2Fen%2Fproducts%2Fpower-management%2Fpower-management-ics-pmics%2Fda9063-pmic-for-quad-core-application-processors&ref=openhardware.directory&product=beaglev-ahead&source=md-export)

## Protocols

- **USB 3.0**
- **HDMI (micro)**
- **CSI (2x 22-pin)**
- **DSI**
- **I2C**
- **UART**
- **SPI**
- **ADC**
- **PWM**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Fbeagleboard-by-seeed-studio%2F102991698%2F20380528&ref=openhardware.directory&product=beaglev-ahead&source=md-export) — $149.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FSeeed-Studio%2F102991698%3Fqs%3D17ckDYBRdek1iDLmq31qVQ%253D%253D&ref=openhardware.directory&product=beaglev-ahead&source=md-export) — $149.00
- [Newark](https://openhardware.directory/r?to=https%3A%2F%2Fwww.newark.com%2Fbeagleboard%2F102991698%2Fbeaglev-ahead-rohs-compliant-yes%2Fdp%2F77AK6556&ref=openhardware.directory&product=beaglev-ahead&source=md-export) — $149.00
- [Farnell](https://openhardware.directory/r?to=https%3A%2F%2Fuk.farnell.com%2Fbeagleboard%2F102991698%2Fbeaglev-ahead%2Fdp%2F4205457&ref=openhardware.directory&product=beaglev-ahead&source=md-export) — $149.00

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.beagleboard.org%2Fboards%2Fbeaglev-ahead&ref=openhardware.directory&product=beaglev-ahead&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fopenbeagle.org%2Fbeaglev%2Fahead&ref=openhardware.directory&product=beaglev-ahead&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.beagleboard.org%2Flatest%2Fboards%2Fbeaglev%2Fahead%2F&ref=openhardware.directory&product=beaglev-ahead&source=md-export)

## Tags

`beagleboard`, `risc-v`, `xuantie-c910`, `th1520`, `single-board-computer`, `linux`, `open-hardware`, `npu`, `ai`

---
[View full device page](https://openhardware.directory/s/1370/beaglev-ahead)

---

# BigTreeTech SKR Mini E3 V3.0

> Latest 32-bit SKR Mini E3 with STM32G0B1RET6 @ 64MHz, 4 integrated TMC2209 UART drivers, USB-C, and CAN bus support. Compact Ender 3 drop-in upgrade. Marlin and Klipper compatible.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$25.99
- **CPU:** STM32G0B1RET6
- **RAM:** 144KB
- **Flash:** 512KB
- **USB:** USB Type-C
- **Power:** 12-24V DC

## Compatible Firmware

- Marlin
- Klipper

## Components

- **STM32G0B1RET6** (MCU): STMicroelectronics STM32G0B1RET6 32-bit ARM Cortex-M0+ microcontroller, 512KB flash, 144KB RAM, with CAN bus and USB Type-C — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32g0b1re.pdf&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v3-0&source=md-export)
- **TMC2209 (integrated x4)** (Stepper Driver): 4x TRINAMIC TMC2209 stepper drivers integrated on PCB with UART mode, StealthChop2, and stallGuard for sensorless homing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.trinamic.com%2Ffileadmin%2Fassets%2FProducts%2FICs_Documents%2FTMC2209_Datasheet_V103.pdf&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v3-0&source=md-export)
- **MicroSD slot** (Storage): MicroSD card slot for firmware flashing and standalone print file storage — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-mini-e3-v2-0-32-bit-control-board-for-ender-3&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v3-0&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**
- **CAN bus**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-mini-e3-v2-0-32-bit-control-board-for-ender-3&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v3-0&source=md-export) — $25.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBIGTREETECH-SKR-mini-E3&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v3-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-mini-e3-v2-0-32-bit-control-board-for-ender-3&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v3-0&source=md-export)

## Tags

`3d-printer`, `control-board`, `stm32`, `marlin`, `klipper`, `bigtreetech`, `open-source`, `32-bit`, `tmc2209`, `ender-3`, `mini`, `integrated-drivers`, `dual-z`, `can-bus`, `usb-c`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-skr-mini-e3-v3-0)

---

# BigTreeTech Panda PWR

> Intelligent power management module with ESP8684 MCU, 4MB flash, 2.4GHz WiFi, and dual USB outputs. Enables remote power control, consumption monitoring, countdown shutdown, and Home Assistant integration.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** power-module
- **Price:** ~$38.99
- **CPU:** ESP8684-MINI-1-H4
- **RAM:** 272KB
- **Flash:** 4MB
- **USB:** USB-A (×2 output),USB Type-C (firmware/input)
- **Power:** 220VAC mains input; 5V USB output

## Connectivity

WiFi 802.11 b/g/n 2.4GHz

## Compatible Firmware

- Home Assistant

## Components

- **ESP8684 WiFi SoC** (wireless): Espressif ESP8684 single-core RISC-V SoC with integrated 2.4GHz WiFi for remote power control and monitoring — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp8684_datasheet_en.pdf&ref=openhardware.directory&product=bigtreetech-panda-pwr&source=md-export)
- **Mains Power Relay** (relay): High-voltage relay for switching 220VAC mains power to the connected printer — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FPandaPWR&ref=openhardware.directory&product=bigtreetech-panda-pwr&source=md-export)

## Protocols

- **WiFi 802.11 b/g/n**
- **MQTT**
- **HTTP REST API**
- **USB 2.0**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-panda-pwr-intelligent-power-management-module&ref=openhardware.directory&product=bigtreetech-panda-pwr&source=md-export) — $38.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FPandaPWR&ref=openhardware.directory&product=bigtreetech-panda-pwr&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-panda-pwr-intelligent-power-management-module&ref=openhardware.directory&product=bigtreetech-panda-pwr&source=md-export)

## Tags

`power-management`, `smart-plug`, `wifi`, `mqtt`, `home-assistant`, `3d-printer`, `bigtreetech`, `open-source`, `panda-series`, `esp8684`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-panda-pwr)

---

# BigTreeTech HBB Handheld Button Board

> RP2040-based handheld button board with 7 mechanical switches and RGB NeoPixel LEDs for manual control of Klipper 3D printers. Triggers homing, heating, motor disable and other macros via USB.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Expansion Board
- **Price:** ~$17.99
- **CPU:** RP2040
- **RAM:** 264KB
- **Flash:** 2MB
- **USB:** USB Type-C
- **Power:** 5V

## Compatible Firmware

- Klipper

## Components

- **7x Mechanical Switch** (button): 7 mechanical key switches on GPIO pins for triggering Klipper macros (homing, heating, motor disable) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FHBB%2Fblob%2Fmaster%2Fsample-bigtreetech-hbb.cfg&ref=openhardware.directory&product=bigtreetech-hbb-handheld-button-board&source=md-export)
- **WS2812B NeoPixel** (led): 7-LED WS2812B NeoPixel chain (GPIO20, GRB) for button status feedback — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=bigtreetech-hbb-handheld-button-board&source=md-export)

## Protocols

- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-hbb&ref=openhardware.directory&product=bigtreetech-hbb-handheld-button-board&source=md-export) — $17.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FHBB&ref=openhardware.directory&product=bigtreetech-hbb-handheld-button-board&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-hbb&ref=openhardware.directory&product=bigtreetech-hbb-handheld-button-board&source=md-export)

## Tags

`handheld-controller`, `button-board`, `klipper`, `3d-printing`, `rp2040`, `bigtreetech`, `hbb`, `neopixel`, `mechanical-switches`, `usb`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-hbb-handheld-button-board)

---

# Libre Computer Alta

> Libre Computer Alta (AML-A311D-CC) — Amlogic A311D hexa-core SBC with 4GB LPDDR4, 5 TOPS NPU, Mali-G52 GPU, 4× USB 3.0, Gigabit Ethernet with PoE, and 4K HDR HDMI 2.0 in a Pi-compatible form factor.

## Quick Facts

- **Brand:** Libre Computer
- **Board Type:** Single Board Computer
- **Price:** ~$90
- **CPU:** Amlogic A311D
- **RAM:** 4GB LPDDR4
- **Flash:** MicroSD,eMMC 5.x
- **GPIO:** 40-pin pins
- **USB:** 4× USB 3.0 Type-A,USB-C 2.0 OTG
- **Power:** 5V/3A USB-C

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- Ubuntu
- Debian
- Armbian
- Mainline Linux

## Components

- **Amlogic A311D** (SoC): 12nm hexa-core SoC with 4× Cortex-A73 + 2× Cortex-A53 and 5 TOPS NPU — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdn.odroid.com%2FS905D3%2FODROID-C4%2FAmlogic_A311D_Datasheet_V0.4_Provisional.pdf&ref=openhardware.directory&product=libre-computer-alta&source=md-export)
- **Mali-G52 MP4** (GPU): OpenGL ES 3.2, Vulkan 1.1, OpenCL 2.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.arm.com%2FProcessors%2FMali-G52&ref=openhardware.directory&product=libre-computer-alta&source=md-export)
- **Amlogic NPU** (NPU): Integrated NPU for AI/ML inference workloads — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdn.odroid.com%2FS905D3%2FODROID-C4%2FAmlogic_A311D_Datasheet_V0.4_Provisional.pdf&ref=openhardware.directory&product=libre-computer-alta&source=md-export)
- **Amlogic AVE10** (Video Decoder): H.265/H.264/VP9 4K60 decode, H.264 1080p60 encode — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdn.odroid.com%2FS905D3%2FODROID-C4%2FAmlogic_A311D_Datasheet_V0.4_Provisional.pdf&ref=openhardware.directory&product=libre-computer-alta&source=md-export)

## Protocols

- **HDMI 2.0**
- **USB 3.0**
- **USB 2.0**
- **I2C**
- **SPI**
- **UART**
- **MIPI CSI**
- **MIPI DSI**
- **IR**

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Libre Computer](https://openhardware.directory/r?to=https%3A%2F%2Flibre.computer%2Fproducts%2Faml-a311d-cc%2F&ref=openhardware.directory&product=libre-computer-alta&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flibre.computer%2Fproducts%2Faml-a311d-cc%2F&ref=openhardware.directory&product=libre-computer-alta&source=md-export)

## Tags

`sbc`, `single-board-computer`, `amlogic`, `a311d`, `npu`, `ai`, `4k`, `hdr`, `poe`, `arm`, `cortex-a73`, `cortex-a53`, `raspberry-pi-compatible`, `libre-computer`

---
[View full device page](https://openhardware.directory/s/1370/libre-computer-alta)

---

# ESP8266 ESP-01S WiFi Module

> Compact ESP8266-based WiFi dev board with 1MB flash, 2 GPIO pins, and 802.11 b/g/n. Runs Arduino, MicroPython, ESPHome, and Tasmota firmware for smart home and IoT projects.

## Quick Facts

- **Brand:** OpenELAB
- **Board Type:** ESP8266
- **Price:** ~$2.9
- **CPU:** Tensilica L106 single-core @ 80/160MHz
- **RAM:** 64KB instruction RAM + 96KB data RAM
- **Flash:** 1MB
- **GPIO:** 2 pins
- **Power:** 3.0–3.6V

## Connectivity

WiFi 802.11 b/g/n

## Compatible Firmware

- arduino
- micropython
- esphome
- tasmota

## Components

- **ESP8266** (mcu): Espressif ESP8266EX single-core Tensilica L106 at 80/160MHz with integrated WiFi 802.11 b/g/n and 1MB flash. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2F0a-esp8266ex_datasheet_en.pdf&ref=openhardware.directory&product=esp8266-esp-01s&source=md-export)

## Protocols

- **UART**: TX=TX, RX=RX
- **GPIO**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fesp8266-esp-01s&ref=openhardware.directory&product=esp8266-esp-01s&source=md-export) — $2.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fesp8266-esp-01s&ref=openhardware.directory&product=esp8266-esp-01s&source=md-export)

## Tags

`esp8266`, `esp-01s`, `wifi`, `iot`, `smart-home`, `arduino`, `micropython`, `esphome`, `tasmota`, `relay`

---
[View full device page](https://openhardware.directory/s/1370/esp8266-esp-01s)

---

# LoRa A39-T230A30D1a SX1262 Module

> Long-range LoRa transceiver module with Semtech SX1262, UART interface, 1W output power, and up to 16km range at 210-241MHz. Ideal for remote telemetry and agricultural IoT.

## Quick Facts

- **Brand:** OpenELAB
- **Board Type:** module
- **Price:** ~$10.9
- **CPU:** SX1262 embedded DSP core (no user-programmable CPU)
- **RAM:** N/A (peripheral module)
- **Flash:** N/A (peripheral module)
- **Power:** 3.3–5.5V

## Components

- **SX1262** (radio): Semtech SX1262 LoRa transceiver with 1W output power, -148dBm sensitivity, and up to 16km range at 210–241MHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lora-a39-module&source=md-export)

## Protocols

- **UART**
- **LoRa**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Flora-a39-t900a30d1a&ref=openhardware.directory&product=lora-a39-module&source=md-export) — $10.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Flora-a39-t900a30d1a&ref=openhardware.directory&product=lora-a39-module&source=md-export)

## Tags

`lora`, `sx1262`, `uart`, `long-range`, `sub-ghz`, `wireless`, `telemetry`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/lora-a39-module)

---

# Waveshare DDSM115 Direct Drive Servo Motor

> All-in-one 115 RPM direct drive servo hub motor with RS485 control, 4096-position encoder, and IP54 rating — designed for robotics, AGVs, and precision motion applications.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** module
- **Price:** ~$76.99
- **CPU:** N/A (integrated servo controller)
- **RAM:** N/A
- **Flash:** N/A
- **Power:** 18V DC (5S LiPo)

## Components

- **PMSM Direct Drive Motor** (Motor): Direct drive PMSM with 0.96 Nm rated torque, 115 RPM rated speed, and 2.0 Nm stall torque — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fddsm115.htm&ref=openhardware.directory&product=waveshare-ddsm115&source=md-export)
- **4096-Position Absolute Encoder** (Sensor): High-resolution magnetic encoder with 4096 positions for precise closed-loop motor control — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fddsm115.htm&ref=openhardware.directory&product=waveshare-ddsm115&source=md-export)
- **Servo Controller** (Controller): Built-in servo controller supporting current, position, and velocity loop modes with RS485 communication — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fddsm115.htm&ref=openhardware.directory&product=waveshare-ddsm115&source=md-export)

## Protocols

- **RS-485**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwaveshare-ddsm115-direct-drive-servo&ref=openhardware.directory&product=waveshare-ddsm115&source=md-export) — $76.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fddsm115.htm&ref=openhardware.directory&product=waveshare-ddsm115&source=md-export)

## Tags

`servo-motor`, `direct-drive`, `rs485`, `robotics`, `waveshare`, `hub-motor`, `encoder`

## Certifications

IP54

---
[View full device page](https://openhardware.directory/s/1370/waveshare-ddsm115)

---

# Waveshare DDSM315 Direct Drive Servo Motor

> High-speed 315 RPM direct drive servo motor with RS485 bus, 12-bit encoder, and IP54 waterproof rating — ideal for RC cars, mobile robots, and DIY robotics platforms.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** module
- **Price:** ~$59.99
- **CPU:** N/A (integrated servo controller)
- **RAM:** N/A
- **Flash:** N/A
- **Power:** 12V-24V DC (18V rated)

## Components

- **PMSM Direct Drive Motor** (Motor): High-speed direct drive PMSM with 0.55 Nm rated torque, 315 RPM no-load speed, and 1.1 Nm stall torque — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fddsm315.htm&ref=openhardware.directory&product=waveshare-ddsm315&source=md-export)
- **12-bit Absolute Encoder** (Sensor): Integrated magnetic encoder with 4096 positions for precise closed-loop servo control — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fddsm315.htm&ref=openhardware.directory&product=waveshare-ddsm315&source=md-export)
- **Servo Controller** (Controller): Built-in controller supporting current, position, and velocity loop modes via RS485 bus — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fddsm315.htm&ref=openhardware.directory&product=waveshare-ddsm315&source=md-export)

## Protocols

- **RS-485**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwaveshare-ddsm315-direct-drive-servo-motor&ref=openhardware.directory&product=waveshare-ddsm315&source=md-export) — $59.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fddsm315.htm&ref=openhardware.directory&product=waveshare-ddsm315&source=md-export)

## Tags

`servo-motor`, `direct-drive`, `rs485`, `robotics`, `waveshare`, `hub-motor`, `rc-car`

## Certifications

IP54

---
[View full device page](https://openhardware.directory/s/1370/waveshare-ddsm315)

---

# LuckFox Pico Pi

> Rockchip RV1106 Linux development board with 40-pin RPi-compatible GPIO, 100M Ethernet, optional WiFi 6, 4G LTE M.2 slot, MIPI CSI camera, 4x USB-A host ports, 8GB eMMC, audio jack, and onboard microphone. Available in A (1 TOPS NPU, 256MB) and B (0.5 TOPS, 128MB) variants.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** dev-board
- **Price:** ~$41.99
- **CPU:** ARM Cortex-A7 @ 1.2GHz + RISC-V MCU, 1 TOPS NPU (Pi A) / 0.5 TOPS (Pi B)
- **RAM:** 256MB DDR3L
- **Flash:** 8GB eMMC
- **USB:** USB-C (power/programming) + 4x USB-A 2.0 Host
- **Power:** 5V

## Connectivity

WiFi WiFi 6 (802.11ax) 2.4/5GHz | Bluetooth Bluetooth 5.2 | Ethernet 10/100 Mbps

## Components

- **RV1106** (soc): Rockchip RV1106G3 SoC with single ARM Cortex-A7 @ 1.2GHz, RISC-V MCU, 1 TOPS NPU, ISP 3.2 (5MP), integrated audio codec and 100M Ethernet MAC PHY. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Frockchips.net%2Fwp-content%2Fuploads%2F2025%2F03%2FRockchip-RV1106-Datasheet-V1.7-20231218.pdf&ref=openhardware.directory&product=waveshare-luckfox-pico-pi&source=md-export)
- **SIM7600G-H** (cellular-modem): SIMCom SIM7600G-H M.2 module providing 4G LTE Cat-4 with global band coverage for cellular IoT connectivity. Optional accessory. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.simcom.com%2Fproduct%2FSIM7600G-H.html&ref=openhardware.directory&product=waveshare-luckfox-pico-pi&source=md-export)

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-pico-pi.htm&ref=openhardware.directory&product=waveshare-luckfox-pico-pi&source=md-export) — 41.99
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB0DPMSRQJR&ref=openhardware.directory&product=waveshare-luckfox-pico-pi&source=md-export) — 41.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-pico-pi.htm&ref=openhardware.directory&product=waveshare-luckfox-pico-pi&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=waveshare-luckfox-pico-pi&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Pico-Pi&ref=openhardware.directory&product=waveshare-luckfox-pico-pi&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Frockchips.net%2Fwp-content%2Fuploads%2F2025%2F03%2FRockchip-RV1106-Datasheet-V1.7-20231218.pdf&ref=openhardware.directory&product=waveshare-luckfox-pico-pi&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-luckfox-pico-pi)

---

# Waveshare CM5-DUAL-ETH-BASE

> Gigabit + 2.5G dual Ethernet base board for Raspberry Pi Compute Module 5 with M.2 NVMe slot, dual HDMI 4K output, dual MIPI interfaces, wide 7-36V input, EEPROM, and encryption chip for industrial IoT applications.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** raspberry-pi-hat
- **Price:** ~$54.99
- **CPU:** BCM2712 (via CM5)
- **RAM:** Depends on CM5 module
- **Flash:** M.2 NVMe + TF card
- **GPIO:** 40-pin RPi header pins
- **USB:** USB 3.2 Gen1 + 2x USB 2.0 + USB-C
- **Power:** 7-36V DC wide input
- **Dimensions:** 109.0 x 91.5mm

## Connectivity

Ethernet 2.5 Gbps + 1 Gbps dual

## Components

- **ATSHA204** (encryption): I2C hardware encryption chip for secure device identity (address 0x64) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FATSHA204A-Data-Sheet-40002025A.pdf&ref=openhardware.directory&product=waveshare-cm5-dual-eth-base&source=md-export)
- **CAT24C32** (eeprom): 32Kbit I2C EEPROM for configuration storage (address 0x50) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.onsemi.com%2Fpdf%2Fdatasheet%2Fcat24c32-d.pdf&ref=openhardware.directory&product=waveshare-cm5-dual-eth-base&source=md-export)
- **USB-to-2.5G Ethernet Controller** (ethernet): USB-to-2.5G Ethernet bridge for second network port — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FCM5-DUAL-ETH-BASE&ref=openhardware.directory&product=waveshare-cm5-dual-eth-base&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **I2S**
- **USB**
- **MIPI CSI**
- **MIPI DSI**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | I2C1 SDA | — | — |
| GPIO3 | I2C1 SCL | — | — |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fcm5-dual-eth-base.htm&ref=openhardware.directory&product=waveshare-cm5-dual-eth-base&source=md-export) — $54.99

## Available Software

- [Raspberry Pi OS](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fsoftware%2F&ref=openhardware.directory&product=waveshare-cm5-dual-eth-base&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fcm5-dual-eth-base.htm&ref=openhardware.directory&product=waveshare-cm5-dual-eth-base&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FCM5-DUAL-ETH-BASE&ref=openhardware.directory&product=waveshare-cm5-dual-eth-base&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FCM5-DUAL-ETH-BASE%2FCM5-DUAL-ETH-BASE-Sch.pdf&ref=openhardware.directory&product=waveshare-cm5-dual-eth-base&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fcm5%2Fcm5-datasheet.pdf&ref=openhardware.directory&product=waveshare-cm5-dual-eth-base&source=md-export)

## Tags

`raspberry-pi`, `compute-module-5`, `cm5`, `carrier-board`, `dual-ethernet`, `2.5g`, `nvme`, `industrial`, `iot-gateway`, `open-source`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-cm5-dual-eth-base)

---

# Waveshare RP2350-Matrix

> Compact RP2350A development board with an 8x8 WS2812 addressable RGB LED matrix, QMI8658 6-axis IMU (accelerometer + gyroscope), 16MB flash, 25 GPIO pins, HSTX interface, and USB-C for interactive LED displays and motion-controlled projects.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$9.99
- **CPU:** ARM Cortex-M33 / RISC-V Hazard3 dual-core @ 150MHz, FPU, DSP, TrustZone, 12 PIO state machines
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **USB:** USB-C (USB 1.1 host/device)
- **Power:** 5V via USB-C (1A+ recommended)

## Components

- **RP2350A** (mcu): Raspberry Pi RP2350A dual-core microcontroller with switchable ARM Cortex-M33 and Hazard3 RISC-V cores at 150MHz, 520KB SRAM, 30 GPIO, HSTX, and 12 PIO state machines. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2350-matrix&source=md-export)
- **WS2812B** (led-driver): 64 WS2812 addressable RGB LEDs arranged in an 8x8 matrix grid, driven by single-wire protocol from a GPIO pin, with DOUT for daisy-chaining additional LEDs. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812.pdf&ref=openhardware.directory&product=waveshare-rp2350-matrix&source=md-export)
- **QMI8658** (accelerometer): QST QMI8658 6-axis inertial measurement unit with 3-axis accelerometer and 3-axis gyroscope, connected via I2C for motion sensing, gesture detection, and orientation tracking. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2Fcommon%2FQMI8658A_Datasheet_Rev_A.pdf&ref=openhardware.directory&product=waveshare-rp2350-matrix&source=md-export)
- **ME6217C33M5G** (voltage-regulator): Microne ME6217C33M5G low dropout regulator providing stable 3.3V output with up to 800mA current for the MCU and peripherals. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.lcsc.com%2Fdatasheet%2Flcsc_datasheet_1912111437_MICRONE-Nanjing-Micro-One-Elec-ME6217C33M5G_C427602.pdf&ref=openhardware.directory&product=waveshare-rp2350-matrix&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GP0 | UART0 TX / I2C0 SDA | — | digital-input, digital-output, pwm |
| GP1 | UART0 RX / I2C0 SCL | — | digital-input, digital-output, pwm |
| GP2 | SPI0 SCK / I2C1 SDA | — | digital-input, digital-output, pwm |
| GP3 | SPI0 TX / I2C1 SCL | — | digital-input, digital-output, pwm |
| GP4 | UART1 TX / SPI0 RX | — | digital-input, digital-output, pwm |
| GP5 | UART1 RX / SPI0 CSn | — | digital-input, digital-output, pwm |
| GP6 | General GPIO | — | digital-input, digital-output, pwm |
| GP7 | General GPIO | — | digital-input, digital-output, pwm |
| GP8 | General GPIO | — | digital-input, digital-output, pwm |
| GP9 | General GPIO | — | digital-input, digital-output, pwm |
| GP10 | SPI1 SCK | — | digital-input, digital-output, pwm |
| GP11 | SPI1 TX | — | digital-input, digital-output, pwm |
| GP12 | SPI1 RX | — | digital-input, digital-output, pwm |
| GP13 | SPI1 CSn | — | digital-input, digital-output, pwm |
| GP14 | General GPIO | — | digital-input, digital-output, pwm |
| GP15 | General GPIO | — | digital-input, digital-output, pwm |
| GP16 | WS2812 DIN (LED Matrix) | — | digital-output |
| GP17 | General GPIO | — | digital-input, digital-output, pwm |
| GP18 | General GPIO | — | digital-input, digital-output, pwm |
| GP19 | General GPIO | — | digital-input, digital-output, pwm |
| GP20 | General GPIO | — | digital-input, digital-output, pwm |
| GP21 | General GPIO | — | digital-input, digital-output, pwm |
| GP22 | General GPIO | — | digital-input, digital-output, pwm |
| GP26 | ADC0 | — | digital-input, digital-output, adc |
| GP27 | ADC1 | — | digital-input, digital-output, adc |

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2350-matrix.htm&ref=openhardware.directory&product=waveshare-rp2350-matrix&source=md-export) — 9.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2350-matrix.htm&ref=openhardware.directory&product=waveshare-rp2350-matrix&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRP2350-Matrix&ref=openhardware.directory&product=waveshare-rp2350-matrix&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2350-matrix&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FRP2350-Matrix%2FRP2350-Matrix.pdf&ref=openhardware.directory&product=waveshare-rp2350-matrix&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-rp2350-matrix)

---

# VisionFive2 Lite

> Compact RISC-V SBC with StarFive JH7110S quad-core 64-bit processor @ 1.25GHz, up to 8GB LPDDR4, onboard WiFi 6 and Bluetooth 5.4, Gigabit Ethernet, HDMI 2.0, M.2 NVMe slot, MIPI CSI camera, 40-pin GPIO, and USB 3.0. Supports Debian, Fedora, OpenWrt, and other Linux distributions.

## Quick Facts

- **Brand:** StarFive
- **Board Type:** sbc
- **Price:** ~$62.99
- **CPU:** RISC-V RV64GC quad-core @ 1.25GHz + monitoring core + real-time core, IMG BXE-4-32 GPU
- **RAM:** 4GB LPDDR4
- **Flash:** QSPI (U-Boot)
- **USB:** USB-C (5V/3A power) + USB 3.0 + 3x USB 2.0
- **Power:** 5V/3A via USB-C
- **Dimensions:** 56 × 85mm

## Connectivity

WiFi WiFi 6 (802.11ax) 2.4/5.8GHz | Bluetooth BLE 5.4 | Ethernet Gigabit

## Components

- **JH7110** (soc): StarFive JH7110S SoC with 4x RISC-V 64-bit cores @ 1.25GHz, 64-bit monitoring core, 32-bit real-time core, H.264/H.265 codec, ISP for camera processing. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdoc-en.rvspace.org%2FJH7110%2FPDF%2FJH7110_DS.pdf&ref=openhardware.directory&product=waveshare-visionfive2-lite&source=md-export)
- **IMG-BXE-4-32** (gpu): Imagination Technologies IMG BXE-4-32 MC1 GPU supporting OpenGL ES 3.2, Vulkan 1.2, and OpenCL 3.0 at 400MHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.imaginationtech.com%2Fproduct%2Fimg-bxe-4-32%2F&ref=openhardware.directory&product=waveshare-visionfive2-lite&source=md-export)

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Frisc-v%2Fboards-kits%2Fvisionfive2-lite.htm&ref=openhardware.directory&product=waveshare-visionfive2-lite&source=md-export) — 62.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Frisc-v%2Fboards-kits%2Fvisionfive2-lite.htm&ref=openhardware.directory&product=waveshare-visionfive2-lite&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fstarfive-tech&ref=openhardware.directory&product=waveshare-visionfive2-lite&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FVisionFive2-Lite&ref=openhardware.directory&product=waveshare-visionfive2-lite&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdoc-en.rvspace.org%2FJH7110%2FPDF%2FJH7110_DS.pdf&ref=openhardware.directory&product=waveshare-visionfive2-lite&source=md-export)

## Certifications

CE, FCC, RoHS

---
[View full device page](https://openhardware.directory/s/1370/waveshare-visionfive2-lite)

---

# FriendlyElec NanoPC-T6 LTS

> Rockchip RK3588 SBC with dual 2.5GbE, dual HDMI output + HDMI input, M.2 NVMe, and a 40-pin GPIO header — the long-term-support variant of FriendlyElec's flagship single-board computer.

## Quick Facts

- **Brand:** FriendlyElec
- **Price:** ~$147
- **CPU:** ARM Cortex-A76 ×4 @ 2.4GHz + Cortex-A55 ×4 @ 1.8GHz
- **RAM:** 4GB / 8GB / 16GB LPDDR4X
- **Flash:** 32GB / 64GB eMMC (HS400) + 32MB SPI NOR
- **USB:** 2× USB 2.0 Type-A, 1× USB 3.0 Type-A, 2× USB-C (one DP Alt Mode)
- **Power:** 12V DC via 5.5×2.1mm barrel jack (65W recommended)
- **Dimensions:** 110 × 80 × 1.6mm

## Connectivity

Ethernet 2× 2.5 Gbps (RTL8125BG, PCIe)

## Components

- **RK3588** (soc): Rockchip RK3588 octa-core SoC: 4× Cortex-A76 @ 2.4GHz + 4× Cortex-A55 @ 1.8GHz, Mali-G610 MP4 GPU, 6 TOPS NPU (INT4/8/16/FP16), 8K H.265/VP9 decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=friendlyelec-nanopc-t6-lts&source=md-export)
- **RTL8125BG** (ethernet-controller): Realtek RTL8125BG 2.5 Gigabit PCIe Ethernet controller × 2, providing dual independent 2.5G LAN ports for high-throughput networking. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.realtek.com%2Fen%2Fproducts%2Fcommunications-network-ics%2Fitem%2Frtl8125bg-cg&ref=openhardware.directory&product=friendlyelec-nanopc-t6-lts&source=md-export)
- **Mali-G610** (gpu): ARM Mali-G610 MP4 GPU supporting OpenGL ES 1.1/2.0/3.2, OpenCL 2.2, and Vulkan 1.2 for hardware-accelerated graphics and GPGPU workloads. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.arm.com%2FProcessors%2FMali-G610&ref=openhardware.directory&product=friendlyelec-nanopc-t6-lts&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| Pin 3 | I2C3_SDA | — | digital-input, digital-output, i2c |
| Pin 5 | I2C3_SCL | — | digital-input, digital-output, i2c |
| Pin 7 | GPIO1_A7 | — | digital-input, digital-output |
| Pin 8 | UART_TX | — | digital-output, uart |
| Pin 10 | UART_RX | — | digital-input, uart |
| Pin 11 | GPIO3_B2 | — | digital-input, digital-output |
| Pin 12 | SPI0_CSn1 | — | digital-output, spi |
| Pin 13 | GPIO3_B3 | — | digital-input, digital-output |
| Pin 15 | GPIO3_B4 | — | digital-input, digital-output |
| Pin 16 | GPIO3_B7 | — | digital-input, digital-output |
| Pin 18 | SPI0_CLK | — | digital-output, spi |
| Pin 19 | SPI0_MOSI | — | digital-output, spi |
| Pin 21 | SPI0_MISO | — | digital-input, spi |
| Pin 22 | GPIO1_A3 | — | digital-input, digital-output |
| Pin 23 | SPI0_CLK | — | digital-output, spi |
| Pin 24 | SPI0_CSn0 | — | digital-output, spi |
| Pin 26 | SPI0_CSn1 | — | digital-output, spi |
| Pin 27 | I2C0_SDA | — | digital-input, digital-output, i2c |
| Pin 28 | I2C0_SCL | — | digital-input, digital-output, i2c |
| Pin 29 | GPIO1_A1 | — | digital-input, digital-output |
| Pin 31 | GPIO1_A0 | — | digital-input, digital-output |
| Pin 32 | PWM0 | — | digital-output, pwm |
| Pin 33 | PWM1 | — | digital-output, pwm |
| Pin 35 | GPIO3_B1 | — | digital-input, digital-output |
| Pin 36 | GPIO4_A0 | — | digital-input, digital-output |
| Pin 37 | GPIO4_A2 | — | digital-input, digital-output |
| Pin 38 | I2S0_SDI | — | digital-input, i2s |
| Pin 40 | I2S0_SDO | — | digital-output, i2s |

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D292&ref=openhardware.directory&product=friendlyelec-nanopc-t6-lts&source=md-export) — 147.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D292&ref=openhardware.directory&product=friendlyelec-nanopc-t6-lts&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPC-T6_LTS&ref=openhardware.directory&product=friendlyelec-nanopc-t6-lts&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=friendlyelec-nanopc-t6-lts&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Fimages%2F4%2F44%2FNanoPC-T6_LTS_2310_SCH.pdf&ref=openhardware.directory&product=friendlyelec-nanopc-t6-lts&source=md-export)

## Tags

`rk3588`, `linux`, `arm`, `sbc`, `nas`, `ethernet`, `npu`, `friendlyelec`, `lts`, `rockchip`

---
[View full device page](https://openhardware.directory/s/1370/friendlyelec-nanopc-t6-lts)

---

# Mekotronics R58-HD

> Triple RK3588 multi-display SBC with 6 HDMI outputs for video walls and digital signage, running Armbian Linux.

## Quick Facts

- **Brand:** Mekotronics
- **Price:** ~$371
- **CPU:** ARM Cortex-A76 ×4 @ 2.4GHz + Cortex-A55 ×4 @ 1.8GHz (3× RK3588)
- **RAM:** Up to 16GB LPDDR4X per SoC (up to 48GB total)
- **Flash:** Up to 128GB eMMC per SoC + 2.5" SATA HDD slot
- **USB:** 5× USB 3.0, 2× USB 2.0, 1× USB Type-C
- **Power:** 12V DC
- **Dimensions:** 440 × 330 × 44mm (1U rack)

## Connectivity

WiFi 802.11 a/b/g/n/ac/ax (WiFi 6) | Bluetooth Bluetooth 5.x | Ethernet 5× Gigabit Ethernet (multiple ports)

## Components

- **RK3588** (soc): Three Rockchip RK3588 SoCs each with 4× Cortex-A76 @ 2.4GHz + 4× Cortex-A55 @ 1.8GHz, Mali-G610 GPU, and 6 TOPS NPU. Each drives 2 HDMI outputs for total 6-display video wall capability. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=mekotronics-r58-hd&source=md-export)

## Where to Buy

- [Mekotronics Official](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mekotronics.com%2Fh-pd-85.html&ref=openhardware.directory&product=mekotronics-r58-hd&source=md-export) — Contact for pricing

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mekotronics.com%2Fh-pd-85.html&ref=openhardware.directory&product=mekotronics-r58-hd&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fmekotronics-r58-hd%2F&ref=openhardware.directory&product=mekotronics-r58-hd&source=md-export)

## Tags

`rk3588`, `video-wall`, `digital-signage`, `multi-display`, `armbian`, `linux-sbc`

---
[View full device page](https://openhardware.directory/s/1370/mekotronics-r58-hd)

---

# Banana Pi M2S

> Banana Pi M2S is a hexa-core SBC powered by the Amlogic S922X SoC with 4GB DDR4, 16GB eMMC, WiFi 5, Bluetooth 5.0, four USB 3.0 ports, and Gigabit Ethernet.

## Quick Facts

- **Brand:** Banana Pi
- **Board Type:** linux-sbc
- **Price:** ~$96
- **CPU:** Amlogic S922X
- **RAM:** 4GB DDR4
- **Flash:** 16GB eMMC
- **USB:** 4x USB 3.0 + USB-C 3.0
- **Power:** 12V DC barrel jack

## Connectivity

WiFi WiFi 5 (802.11ac) | Bluetooth BT 5.0 | Ethernet Gigabit Ethernet (10/100/1000M)

## Compatible Firmware

- armbian

## Components

- **Amlogic S922X** (soc): Amlogic S922X hexa-core SoC with four Cortex-A73 cores at 1.8GHz and two Cortex-A53 cores at 1.9GHz, Mali-G52 GPU. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amlogic.com%2F%23Products%2F395%2Findex.html&ref=openhardware.directory&product=bananapi-m2s&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Banana Pi](https://openhardware.directory/r?to=https%3A%2F%2Fwww.banana-pi.org%2Fen%2Fbanana-pi-sbcs%2F97.html&ref=openhardware.directory&product=bananapi-m2s&source=md-export) — $96.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fbananapi-m2s%2F&ref=openhardware.directory&product=bananapi-m2s&source=md-export)
- [vendor](https://openhardware.directory/r?to=https%3A%2F%2Fwww.banana-pi.org%2Fen%2Fbanana-pi-sbcs%2F97.html&ref=openhardware.directory&product=bananapi-m2s&source=md-export)

## Tags

`banana-pi`, `amlogic`, `s922x`, `sbc`, `linux`, `armbian`, `wifi5`, `bluetooth`, `usb3`, `gigabit-ethernet`, `single-board-computer`

---
[View full device page](https://openhardware.directory/s/1370/bananapi-m2s)

---

# Radxa E54C

> High-performance Rockchip RK3588S edge gateway with 8GB LPDDR4X, 4x Gigabit Ethernet ports (RTL8367RB switch), PCIe expansion, USB 3.0, HDMI, and 12V DC power — built for demanding network and edge AI workloads.

## Quick Facts

- **Brand:** Radxa
- **Board Type:** linux-sbc
- **Price:** ~$55
- **CPU:** Rockchip RK3588S
- **RAM:** 8GB LPDDR4X
- **Flash:** eMMC (onboard)
- **Power:** 12V DC barrel jack

## Connectivity

Ethernet 4x Gigabit Ethernet (RTL8367RB switch)

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arace Tech](https://openhardware.directory/r?to=https%3A%2F%2Farace.tech%2Fproducts%2Fradxa-e54c&ref=openhardware.directory&product=radxa-e54c&source=md-export) — $55.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Fnetwork-computer%2Fe54c&ref=openhardware.directory&product=radxa-e54c&source=md-export)
- [armbian](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fradxa-e54c%2F&ref=openhardware.directory&product=radxa-e54c&source=md-export)

## Tags

`radxa`, `e54c`, `rk3588s`, `gateway`, `router`, `4-port`, `linux`, `armbian`, `edge-ai`, `gigabit`

---
[View full device page](https://openhardware.directory/s/1370/radxa-e54c)

---

# TI SK-AM62B

> Texas Instruments SK-AM62B Starter Kit — dual-core Cortex-A53 Sitara developer evaluation board for industrial HMI and IoT applications, running Armbian Linux.

## Quick Facts

- **Brand:** Texas Instruments
- **Board Type:** linux-sbc
- **Price:** ~$199
- **CPU:** ti-am62x
- **RAM:** 2GB LPDDR4
- **Flash:** none
- **USB:** USB-C, USB 3.0
- **Power:** 5V

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [TI Store](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Ftool%2FSK-AM62B-P1&ref=openhardware.directory&product=ti-sk-am62b&source=md-export) — $199.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Ftool%2FSK-AM62B&ref=openhardware.directory&product=ti-sk-am62b&source=md-export)

## Tags

`linux-sbc`, `armbian`, `cortex-a53`, `sitara`, `industrial`, `texas-instruments`, `developer-kit`

---
[View full device page](https://openhardware.directory/s/1370/ti-sk-am62b)

---

# Adafruit Feather RP2040 RFM69 868/915 MHz

> RP2040 Feather with integrated RFM69HCW 868/915 MHz packet radio transceiver, 8MB flash, LiPo charging, STEMMA QT, and uFL antenna connector for long-range wireless mesh networks.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** feather
- **Price:** ~$19.95
- **CPU:** RP2040
- **RAM:** 264 KB
- **Flash:** 8 MB
- **Power:** 5V + LiPo
- **Dimensions:** 52.2 x 23.0 x 7.3 mm

## Compatible Firmware

- circuitpython
- micropython
- arduino

## Components

- **RP2040** (mcu): Dual-core ARM Cortex-M0+ at 133 MHz, 264KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-rp2040-rfm69&source=md-export)
- **RFM69HCW** (radio): 868/915 MHz FSK packet radio, SX1231-based, +20 dBm, AES-128, SPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3070%2FRFM69HCW-V1.1.pdf&ref=openhardware.directory&product=adafruit-feather-rp2040-rfm69&source=md-export)

## Protocols

- **I2C**: SDA=GPIO24, SCL=GPIO25
- **SPI**: MOSI=GPIO11, MISO=GPIO12, SCK=GPIO13, CS=GPIO10
- **UART**: TX=GPIO0, RX=GPIO1

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | TX — UART | — | digital-input, digital-output, pwm |
| GPIO1 | RX — UART | — | digital-input, digital-output, pwm |
| GPIO2 | D2 — GPIO | — | digital-input, digital-output, pwm |
| GPIO3 | D3 — GPIO | — | digital-input, digital-output, pwm |
| GPIO4 | D4 — GPIO | — | digital-input, digital-output, pwm |
| GPIO5 | D5 — GPIO | — | digital-input, digital-output, pwm |
| GPIO6 | D6 — RFM69 CS | — | digital-input, digital-output, pwm |
| GPIO7 | D7 — GPIO | — | digital-input, digital-output |
| GPIO8 | D8 — GPIO | — | digital-input, digital-output |
| GPIO9 | D9 — GPIO | — | digital-input, digital-output |
| GPIO10 | RFM69 CS | — | digital-input, digital-output |
| GPIO11 | MOSI — SPI | — | digital-input, digital-output |
| GPIO12 | MISO — SPI | — | digital-input, digital-output |
| GPIO13 | SCK — SPI | — | digital-input, digital-output |
| GPIO14 | RFM69 IRQ | — | digital-input, interrupt |
| GPIO15 | RFM69 RST | — | digital-output |
| GPIO24 | SDA — I2C (STEMMA QT) | — | digital-input, digital-output |
| GPIO25 | SCL — I2C (STEMMA QT) | — | digital-input, digital-output |
| GPIO26 | A0 — ADC0 | — | analog-input, digital-input, digital-output |
| GPIO27 | A1 — ADC1 | — | analog-input, digital-input, digital-output |
| GPIO28 | A2 — ADC2 | — | analog-input, digital-input, digital-output |
| GPIO29 | A3 — ADC3 | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5712&ref=openhardware.directory&product=adafruit-feather-rp2040-rfm69&source=md-export) — 19.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5712&ref=openhardware.directory&product=adafruit-feather-rp2040-rfm69&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Ffeather-rp2040-rfm69&ref=openhardware.directory&product=adafruit-feather-rp2040-rfm69&source=md-export)

## Tags

`adafruit`, `feather`, `rp2040`, `rfm69`, `packet-radio`, `sub-ghz`, `868mhz`, `915mhz`, `circuitpython`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-rp2040-rfm69)

---

# BeagleBone AI-64

> Powerful open-source AI/ML single board computer featuring TI TDA4VM SoC with dual Arm Cortex-A72 at 2.0 GHz, 8 TOPS deep-learning accelerator, C7x DSP, 4GB LPDDR4, 16GB eMMC, USB 3.0, Gigabit Ethernet, and BeagleBone cape compatibility.

## Quick Facts

- **Brand:** BeagleBoard
- **Board Type:** Single Board Computer
- **Price:** ~$185.62
- **CPU:** TI TDA4VM (Dual Arm Cortex-A72 @ 2.0 GHz)
- **RAM:** 4GB LPDDR4
- **Flash:** 16GB eMMC
- **GPIO:** 2x 46-pin BeagleBone headers pins
- **USB:** USB 3.0 Type-C,2x USB 3.0 Type-A
- **Power:** 5V DC

## Connectivity

Ethernet Gigabit Ethernet

## Compatible Firmware

- Debian Linux
- Armbian

## Components

- **TDA4VM** (processor): Texas Instruments Jacinto TDA4VM with dual Arm Cortex-A72 at 2.0GHz, C7x DSP, 8 TOPS MMA deep-learning accelerator, vision processing accelerators, and six Cortex-R5F real-time MCUs — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FTDA4VM&ref=openhardware.directory&product=beaglebone-ai-64&source=md-export)
- **PowerVR Rogue 8XE GE8430** (gpu): Imagination Technologies PowerVR Rogue 8XE GPU running at up to 750MHz delivering 96 GFLOPS and 6 Gpix/sec — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.imaginationtech.com%2Fgpu%2Frogue%2F&ref=openhardware.directory&product=beaglebone-ai-64&source=md-export)
- **4GB LPDDR4** (memory): 4GB LPDDR4 RAM for high-bandwidth AI/ML workloads and multitasking — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FTDA4VM&ref=openhardware.directory&product=beaglebone-ai-64&source=md-export)
- **16GB eMMC** (storage): 16GB eMMC flash with high-speed interface for OS and application storage — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FTDA4VM&ref=openhardware.directory&product=beaglebone-ai-64&source=md-export)

## Protocols

- **USB 3.0**
- **PCIe (M.2 E-key)**
- **CSI (2x 4-Lane)**
- **DSI (4-Lane)**
- **DisplayPort (Mini)**
- **UART**
- **JTAG**
- **I2C**
- **SPI**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Fbeagleboard-by-seeed-studio%2F102110646%2F15929655&ref=openhardware.directory&product=beaglebone-ai-64&source=md-export) — $185.62
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FBeagleBoard-by-Seeed-Studio%2F102110646%3Fqs%3DZnm5pLBrcAKSPlLdpqfmWA%253D%253D&ref=openhardware.directory&product=beaglebone-ai-64&source=md-export) — $185.62
- [Element14](https://openhardware.directory/r?to=https%3A%2F%2Freferral.element14.com%2FOrderCodeView%3Ffsku%3D3923739%26nsku%3D26AK8283&ref=openhardware.directory&product=beaglebone-ai-64&source=md-export) — $185.62

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.beagleboard.org%2Fboards%2Fbeaglebone-ai-64&ref=openhardware.directory&product=beaglebone-ai-64&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fopenbeagle.org%2Fbeagleboard%2Fbeaglebone-ai-64&ref=openhardware.directory&product=beaglebone-ai-64&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.beagleboard.org%2Flatest%2Fboards%2Fbeaglebone%2Fai-64%2F&ref=openhardware.directory&product=beaglebone-ai-64&source=md-export)

## Tags

`beagleboard`, `ai`, `machine-learning`, `arm-cortex-a72`, `tda4vm`, `single-board-computer`, `linux`, `open-hardware`

---
[View full device page](https://openhardware.directory/s/1370/beaglebone-ai-64)

---

# NanoPi M5

> Mid-range RK3576 SBC with 4x Cortex-A72 + 4x Cortex-A53 at 2.2GHz, up to 8GB RAM, dual Gigabit Ethernet, M.2 NVMe, HDMI 4K, 6 TOPS NPU, MIPI-CSI/DSI, 30-pin GPIO, and USB-C PD in a compact 90×62mm form factor.

## Quick Facts

- **Brand:** FriendlyElec
- **Board Type:** sbc
- **Price:** ~$65
- **CPU:** ARM Cortex-A72 4x2.2GHz,Cortex-A53 4x2.0GHz, RK3576
- **RAM:** 3GB/4GB/8GB LPDDR4X
- **Flash:** 16MB SPI NOR,eMMC module
- **USB:** 2x USB 3.2 Gen1 Type-A,USB-C PD
- **Power:** USB-C PD (6-20V)
- **Dimensions:** 90 × 62mm

## Connectivity

Ethernet 2x Gigabit

## Compatible Firmware

- arduino

## Components

- **RK3576** (mcu): Rockchip RK3576 with 4x Cortex-A72 at 2.2GHz + 4x Cortex-A53 at 2.0GHz, Mali-G52 MC3, 6 TOPS NPU, 8K decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fuploads%2Fpdf%2F2024.01.12%2FRK3576%2520Brief%2520Datasheet%2520V1.0-20240112.pdf&ref=openhardware.directory&product=nanopi-m5&source=md-export)

## Protocols

- **SPI**: notes=2x SPI via 30-pin GPIO
- **I2C**: notes=3x I2C via 30-pin GPIO
- **UART**: notes=4x UART via 30-pin GPIO + debug

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | Digital I/O | — | digital-input, digital-output, pwm |
| GPIO2 | Digital I/O | — | digital-input, digital-output, pwm |
| GPIO3 | SPI/UART | — | digital-input, digital-output |
| GPIO4 | I2C/UART | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D309&ref=openhardware.directory&product=nanopi-m5&source=md-export) — $65.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D309&ref=openhardware.directory&product=nanopi-m5&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_M5&ref=openhardware.directory&product=nanopi-m5&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ffriendlyarm%2Fsd-fuse_rk3576&ref=openhardware.directory&product=nanopi-m5&source=md-export)

## Tags

`friendlyelec`, `nanopi`, `rk3576`, `sbc`, `npu`, `nvme`, `dual-gbe`

---
[View full device page](https://openhardware.directory/s/1370/nanopi-m5)

---

# BigTreeTech SKR Pro V1.1

> 32-bit 3D printer control board powered by STM32F407ZGT6 @ 168MHz. Supports 6 stepper drivers, triple extruder, dual Z, 12–24V input. Compatible with Marlin and Klipper firmware.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$29.99
- **CPU:** STM32F407ZGT6
- **RAM:** 192KB
- **Flash:** 1MB
- **USB:** USB Type-C
- **Power:** 12-24V DC

## Compatible Firmware

- Marlin
- Klipper

## Components

- **STM32F407ZGT6** (MCU): STMicroelectronics 32-bit ARM Cortex-M4 microcontroller with FPU, 1MB flash, 192KB RAM, running at 168MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32f407zg.pdf&ref=openhardware.directory&product=bigtreetech-skr-pro-v1-1&source=md-export)
- **TMC2209** (Stepper Driver Socket): TRINAMIC TMC2209 stepper driver with StealthChop2, SpreadCycle, UART interface, up to 2.8A RMS — 6 sockets on this board — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.trinamic.com%2Ffileadmin%2Fassets%2FProducts%2FICs_Documents%2FTMC2209_Datasheet_V103.pdf&ref=openhardware.directory&product=bigtreetech-skr-pro-v1-1&source=md-export)
- **MicroSD slot** (Storage): MicroSD card slot for firmware updates and standalone print file storage — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-pro-v1-1-32-bit-control-board&ref=openhardware.directory&product=bigtreetech-skr-pro-v1-1&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-pro-v1-1-32-bit-control-board&ref=openhardware.directory&product=bigtreetech-skr-pro-v1-1&source=md-export) — $29.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBIGTREETECH-SKR-PRO-V1.1&ref=openhardware.directory&product=bigtreetech-skr-pro-v1-1&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-pro-v1-1-32-bit-control-board&ref=openhardware.directory&product=bigtreetech-skr-pro-v1-1&source=md-export)

## Tags

`3d-printer`, `control-board`, `stm32`, `marlin`, `klipper`, `bigtreetech`, `open-source`, `32-bit`, `tmc2209`, `stepper-driver`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-skr-pro-v1-1)

---

# BigTreeTech SKR V1.4 Turbo

> 32-bit 3D printer control board with LPC1769 @ 120MHz. Supports 5 stepper driver sockets, dual Z, 12–24V, TMC2209 UART. Popular Marlin and Klipper compatible upgrade board.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$22.99
- **CPU:** LPC1769
- **RAM:** 64KB
- **Flash:** 512KB
- **USB:** USB Type-C
- **Power:** 12-24V DC

## Compatible Firmware

- Marlin
- Klipper

## Components

- **LPC1769** (MCU): NXP LPC1769 32-bit ARM Cortex-M3 microcontroller, 512KB flash, 64KB SRAM, running at 120MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FLPC1769_68_67_66_65_64_63.pdf&ref=openhardware.directory&product=bigtreetech-skr-v1-4-turbo&source=md-export)
- **TMC2209** (Stepper Driver Socket): TRINAMIC TMC2209 stepper driver socket with UART mode support, StealthChop2, and stallGuard — 5 sockets on this board — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.trinamic.com%2Ffileadmin%2Fassets%2FProducts%2FICs_Documents%2FTMC2209_Datasheet_V103.pdf&ref=openhardware.directory&product=bigtreetech-skr-v1-4-turbo&source=md-export)
- **MicroSD slot** (Storage): MicroSD card slot for firmware flashing and standalone print file access — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-v1-4-skr-v1-4-turbo-control-board-tmc2209-tmc2208-eeprom-v1-0-exp-mot-v1-0-3d-printer-parts-for-ender-3&ref=openhardware.directory&product=bigtreetech-skr-v1-4-turbo&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-v1-4-skr-v1-4-turbo-control-board-tmc2209-tmc2208-eeprom-v1-0-exp-mot-v1-0-3d-printer-parts-for-ender-3&ref=openhardware.directory&product=bigtreetech-skr-v1-4-turbo&source=md-export) — $22.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBIGTREETECH-SKR-V1.4&ref=openhardware.directory&product=bigtreetech-skr-v1-4-turbo&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-v1-4-skr-v1-4-turbo-control-board-tmc2209-tmc2208-eeprom-v1-0-exp-mot-v1-0-3d-printer-parts-for-ender-3&ref=openhardware.directory&product=bigtreetech-skr-v1-4-turbo&source=md-export)

## Tags

`3d-printer`, `control-board`, `lpc1769`, `marlin`, `klipper`, `bigtreetech`, `open-source`, `32-bit`, `tmc2209`, `skr`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-skr-v1-4-turbo)

---

# BigTreeTech SKR 3

> High-performance 32-bit 3D printer board with STM32H743VI @ 480MHz, 5 driver slots, CAN bus, FDCAN, WiFi module support, 12–24V, 10A bed output. Marlin, Klipper, and RepRapFirmware compatible.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$39.99
- **CPU:** STM32H743VI
- **RAM:** 1MB
- **Flash:** 2MB
- **USB:** USB Type-C
- **Power:** 12-24V DC

## Connectivity

WiFi optional (ESP module)

## Compatible Firmware

- Marlin
- Klipper
- RepRapFirmware

## Components

- **STM32H743VI** (MCU): STMicroelectronics STM32H743VI 32-bit ARM Cortex-M7 microcontroller, 2MB flash, 1MB RAM, running at 480MHz with FDCAN bus support — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32h743vi.pdf&ref=openhardware.directory&product=bigtreetech-skr-3&source=md-export)
- **TMC2209 socket x5** (Stepper Driver Socket): 5x stepper driver sockets supporting TMC5160, TMC2209, TMC2208, TMC2130, DRV8825, A4988 and more in SPI, UART, and STEP/DIR modes — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.trinamic.com%2Ffileadmin%2Fassets%2FProducts%2FICs_Documents%2FTMC2209_Datasheet_V103.pdf&ref=openhardware.directory&product=bigtreetech-skr-3&source=md-export)
- **ESP32 (optional)** (Wireless Module): Optional WiFi connectivity via ESP-12S, ESP-07S, ESP32U, or ESP32E module for OctoPrint/Mainsail wireless access — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=bigtreetech-skr-3&source=md-export)
- **MicroSD slot** (Storage): MicroSD card slot for firmware and print file storage — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-btt-skr-3-control-board-for-3d-printer&ref=openhardware.directory&product=bigtreetech-skr-3&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**
- **CAN bus**
- **FDCAN**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-btt-skr-3-control-board-for-3d-printer&ref=openhardware.directory&product=bigtreetech-skr-3&source=md-export) — $39.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FSKR-3&ref=openhardware.directory&product=bigtreetech-skr-3&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-btt-skr-3-control-board-for-3d-printer&ref=openhardware.directory&product=bigtreetech-skr-3&source=md-export)

## Tags

`3d-printer`, `control-board`, `stm32h7`, `marlin`, `klipper`, `reprapfirmware`, `bigtreetech`, `open-source`, `32-bit`, `tmc2209`, `tmc5160`, `can-bus`, `fdcan`, `wifi`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-skr-3)

---

# NanoPi M6

> RK3588S SBC with 4x Cortex-A76 + 4x Cortex-A53 at 2.4GHz, up to 32GB LPDDR5, M.2 NVMe, Gigabit Ethernet, HDMI 2.1 (8K), dual MIPI-DSI/CSI, 6 TOPS NPU, and USB-C PD — FriendlyElec's compact RK3588S desktop-class board.

## Quick Facts

- **Brand:** FriendlyElec
- **Board Type:** sbc
- **Price:** ~$130
- **CPU:** ARM Cortex-A76 4x2.4GHz,Cortex-A53 4x1.8GHz, RK3588S
- **RAM:** 4GB/16GB/32GB LPDDR5
- **Flash:** eMMC module,16MB SPI NOR
- **USB:** USB 3.0,2x USB 2.0,USB-C PD
- **Power:** USB-C PD (5-20V)
- **Dimensions:** 62 × 90mm

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- arduino

## Components

- **RK3588S** (mcu): Rockchip RK3588S with 4x Cortex-A76 + 4x Cortex-A53, Mali-G610 MP4, 6 TOPS NPU, 8K video. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fuploads%2Fpdf%2F2022.8.26%2F192%2FRK3588%2520Brief%2520Datasheet.pdf&ref=openhardware.directory&product=nanopi-m6&source=md-export)

## Protocols

- **UART**: notes=Debug UART 3-pin header
- **PCIe**: notes=M.2 M-Key PCIe 2.1 for NVMe

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | Digital I/O | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D301&ref=openhardware.directory&product=nanopi-m6&source=md-export) — $130.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D301&ref=openhardware.directory&product=nanopi-m6&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_M6&ref=openhardware.directory&product=nanopi-m6&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ffriendlyarm%2Fsd-fuse_rk3588&ref=openhardware.directory&product=nanopi-m6&source=md-export)

## Tags

`friendlyelec`, `nanopi`, `rk3588s`, `sbc`, `8k`, `nvme`, `npu`, `32gb`

---
[View full device page](https://openhardware.directory/s/1370/nanopi-m6)

---

# LILYGO T7-C6

> Compact ESP32-C6 development board with WiFi 6, BLE 5, and IEEE 802.15.4 (Zigbee/Thread/Matter) support, featuring 4MB flash and USB-C for next-generation IoT protocols.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$6.8
- **CPU:** RISC-V single-core @ 160MHz
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.0 | Zigbee Zigbee 3.0

## Compatible Firmware

- arduino
- esp-idf
- micropython
- zephyr

## Components

- **ESP32-C6-MINI-1** (mcu): Espressif ESP32-C6 RISC-V single-core at 160MHz with WiFi 6, BLE 5.0, and IEEE 802.15.4 for Zigbee/Thread/Matter — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t7-c6&source=md-export)

## Where to Buy

- [undefined](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft7-c6&ref=openhardware.directory&product=lilygo-t7-c6&source=md-export) — 6.80

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft7-c6&ref=openhardware.directory&product=lilygo-t7-c6&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-T-Dongle-C6&ref=openhardware.directory&product=lilygo-t7-c6&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t7-c6)

---

# LILYGO T-ICM-20948

> Breakout module for the InvenSense ICM-20948 9-axis MEMS IMU, combining a 3-axis gyroscope, 3-axis accelerometer, and 3-axis magnetometer with an onboard Digital Motion Processor for real-time motion tracking.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** sensor-module
- **Price:** ~$5.22
- **CPU:** ICM-20948 (Digital Motion Processor)
- **RAM:** 4KB FIFO
- **Flash:** none
- **Power:** 3.3V

## Compatible Firmware

- arduino

## Components

- **ICM-20948** (accelerometer): InvenSense 9-axis low-power MEMS IMU with 3-axis gyroscope (±2000dps), 3-axis accelerometer (±16g), 3-axis magnetometer (±4900µT), and onboard DMP — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fwp-content%2Fuploads%2F2016%2F06%2FDS-000189-ICM-20948-v1.3.pdf&ref=openhardware.directory&product=lilygo-t-icm-20948&source=md-export)

## Protocols

- **I2C**
- **SPI**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-icm-20948&ref=openhardware.directory&product=lilygo-t-icm-20948&source=md-export) — $5.22

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-icm-20948&ref=openhardware.directory&product=lilygo-t-icm-20948&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Display-S3-Pro&ref=openhardware.directory&product=lilygo-t-icm-20948&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fwp-content%2Fuploads%2F2016%2F06%2FDS-000189-ICM-20948-v1.3.pdf&ref=openhardware.directory&product=lilygo-t-icm-20948&source=md-export)

## Tags

`icm-20948`, `invensense`, `imu`, `9-axis`, `accelerometer`, `gyroscope`, `magnetometer`, `sensor-module`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-icm-20948)

---

# Sonoff Zigbee 3.0 USB Dongle Plus E

> EFR32MG21-based Zigbee 3.0 USB coordinator dongle for Home Assistant and Zigbee2MQTT. A popular, reliable choice for building smart home Zigbee networks.

## Quick Facts

- **Brand:** Sonoff
- **Board Type:** usb-dongle
- **Price:** ~$29.9
- **CPU:** EFR32MG21
- **RAM:** 256KB SRAM
- **Flash:** 1024KB
- **USB:** USB 2.0 Type-A
- **Power:** 5V

## Connectivity

Zigbee Zigbee 3.0

## Compatible Firmware

- zigbee2mqtt
- zha
- ember-znet

## Components

- **EFR32MG21** (SoC): Silicon Labs Zigbee 3.0 SoC with +20 dBm TX power — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2Fefr32mg21-datasheet.pdf&ref=openhardware.directory&product=sonoff-zigbee-3-0-usb-dongle-plus-e&source=md-export)

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fseeed-studio-sonoff-zigbee-3-0-usb-dongle-plus-zbdongle-e&ref=openhardware.directory&product=sonoff-zigbee-3-0-usb-dongle-plus-e&source=md-export) — $29.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fgateway-and-sensors%2Fsonoff-zigbee-3-0-usb-dongle-plus-e%2F&ref=openhardware.directory&product=sonoff-zigbee-3-0-usb-dongle-plus-e&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fitead%2FSonoff_Zigbee_Dongle_Firmware&ref=openhardware.directory&product=sonoff-zigbee-3-0-usb-dongle-plus-e&source=md-export)

## Tags

`zigbee`, `coordinator`, `home-assistant`, `zigbee2mqtt`, `sonoff`, `efr32mg21`, `smart-home`, `usb-dongle`

---
[View full device page](https://openhardware.directory/s/1370/sonoff-zigbee-3-0-usb-dongle-plus-e)

---

# PicoGlitcher V3

> Open-source voltage glitching tool for hardware security research, based on Raspberry Pi Pico 2 (RP2350) with dual high-power MOSFETs, 4 selectable voltage levels, and adjustable Schmitt trigger inputs.

## Quick Facts

- **Brand:** Faulty Hardware
- **Board Type:** security-tool
- **Price:** ~$54
- **CPU:** RP2350 Dual-core ARM Cortex-M33 / RISC-V Hazard3 @ 150MHz
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **GPIO:** 26 pins
- **USB:** Micro-USB
- **Power:** 5V via Micro-USB

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet false

## Components

- **RP2350** (mcu): Dual-core ARM Cortex-M33 / RISC-V Hazard3 microcontroller at 150MHz with 520KB SRAM, providing high-speed glitch timing control. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=picoglitcher-v3&source=md-export)
- **High-Power MOSFET (Crowbar Glitch)** (power-management): Two N-channel MOSFET transistors (IRF9410/NDS8434-compatible SOIC-8) capable of switching up to 66A for generating crowbar-style voltage glitches on target power rails. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.infineon.com%2Fdgdl%2FInfineon-IRF9410-DataSheet-v01_01-EN.pdf%3FfileId%3D5546d462533600a40153567a25b42552&ref=openhardware.directory&product=picoglitcher-v3&source=md-export)
- **Adjustable Schmitt Trigger** (sensor): Two Schmitt trigger input channels (EXT1, EXT2) with adjustable threshold, attenuation, and hysteresis via onboard potentiometers for reliable glitch triggering. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fsn74lvc1g17.pdf&ref=openhardware.directory&product=picoglitcher-v3&source=md-export)
- **Voltage Level Shifter** (bus-controller): Two SN74LVC8T245 bidirectional voltage level shifters from Texas Instruments for translating signals between the RP2350 (3.3V) and target devices at 1.2V to 5V. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fsn74lvc8t245.pdf&ref=openhardware.directory&product=picoglitcher-v3&source=md-export)
- **Voltage Multiplexer** (power-management): Analog multiplexer for rapid switching between four voltage outputs (1.2V, 1.8V, 3.3V, 5V) during fault injection operations. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fcd74hc4067.pdf&ref=openhardware.directory&product=picoglitcher-v3&source=md-export)

## Protocols

- **UART**
- **SPI**
- **GPIO**
- **SWD**
- **ADC**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** GPL-3.0

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Ffaulty-hardware%2Fpicoglitcher-v3%2F&ref=openhardware.directory&product=picoglitcher-v3&source=md-export) — $54.00
- [Faulty Hardware](https://openhardware.directory/r?to=https%3A%2F%2Ffaultyhardware.de&ref=openhardware.directory&product=picoglitcher-v3&source=md-export) — €55.00

## Available Software

- [findus](https://openhardware.directory/r?to=https%3A%2F%2Fpypi.org%2Fproject%2Ffindus%2F&ref=openhardware.directory&product=picoglitcher-v3&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Ffaultyhardware.de&ref=openhardware.directory&product=picoglitcher-v3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FMKesenheimer%2Ffault-injection-library&ref=openhardware.directory&product=picoglitcher-v3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Ffault-injection-library.readthedocs.io%2F&ref=openhardware.directory&product=picoglitcher-v3&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FMKesenheimer%2Ffault-injection-library%2Ftree%2Fmaster%2Fschematics&ref=openhardware.directory&product=picoglitcher-v3&source=md-export)

## Tags

`voltage-glitching`, `fault-injection`, `hardware-security`, `rp2350`, `raspberry-pi-pico-2`, `open-source-hardware`, `crowbar-glitch`, `penetration-testing`, `side-channel`, `findus`

---
[View full device page](https://openhardware.directory/s/1370/picoglitcher-v3)

---

# Waveshare UGV Beast

> Open-source ROS2 AI robot with tracked chassis, Raspberry Pi 4B/5, ESP32 sub-controller, 5MP camera with pan-tilt, IMU, and support for LiDAR expansion. Programmable via Python, OpenCV, and ROS2.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** robot
- **Price:** ~$749
- **CPU:** Broadcom BCM2711 / BCM2712
- **RAM:** 4GB
- **Flash:** microSD (via Raspberry Pi)
- **Power:** 3S 18650 UPS module (11.1V)

## Connectivity

WiFi 802.11 b/g/n/ac | Bluetooth BLE 5.0

## Compatible Firmware

- ROS2
- Python
- OpenCV

## Components

- **5MP Ultra-Wide Camera** (Camera): Ultra-wide-angle camera with 160° field of view for computer vision tasks including object tracking, face detection, and gesture recognition — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FUGV-Beast&ref=openhardware.directory&product=waveshare-ugv-beast&source=md-export)
- **ICM-20948** (IMU): InvenSense ICM-20948 9-axis inertial measurement unit combining 3-axis accelerometer, gyroscope, and magnetometer for attitude sensing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fproducts%2Fmotion-tracking%2F9-axis%2Ficm-20948%2F&ref=openhardware.directory&product=waveshare-ugv-beast&source=md-export)
- **ESP32** (MCU): ESP32 microcontroller handling motor PID control, sensor processing, and ESP-NOW multi-robot communication — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=waveshare-ugv-beast&source=md-export)
- **ST3215** (Servo): Waveshare ST3215 servo with 30KG.CM torque powering the 2-axis pan-tilt camera module — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FST3215_Servo&ref=openhardware.directory&product=waveshare-ugv-beast&source=md-export)
- **OLED Display** (Display): Small OLED display for real-time robot status monitoring — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FUGV-Beast&ref=openhardware.directory&product=waveshare-ugv-beast&source=md-export)
- **Microphone** (Audio): Built-in microphone for audio input capabilities — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FUGV-Beast&ref=openhardware.directory&product=waveshare-ugv-beast&source=md-export)
- **INA219** (Power Monitor): Texas Instruments INA219 high-side current shunt and power monitor for battery voltage and current sensing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FINA219&ref=openhardware.directory&product=waveshare-ugv-beast&source=md-export)

## Protocols

- **I2C**
- **UART**
- **SPI**
- **GPIO**
- **ESP-NOW**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenElab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwaveshare-ugv-beast-ros2-robot&ref=openhardware.directory&product=waveshare-ugv-beast&source=md-export) — $749

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fugv-beast.htm&ref=openhardware.directory&product=waveshare-ugv-beast&source=md-export)
- [wiki](https://openhardware.directory/r?to=http%3A%2F%2Fwww.waveshare.com%2Fwiki%2FUGV-Beast&ref=openhardware.directory&product=waveshare-ugv-beast&source=md-export)

## Tags

`ros2`, `raspberry-pi`, `esp32`, `tracked-robot`, `autonomous-vehicle`, `computer-vision`, `open-source`, `ai-robot`, `pan-tilt`, `ugv`

---
[View full device page](https://openhardware.directory/s/1370/waveshare-ugv-beast)

---

# Holybro M10 GPS

> u-blox M10 GPS module with IST8310 compass for Pixhawk flight controllers. Supports GPS, GLONASS, Galileo, and BeiDou constellations with onboard safety switch, buzzer, and LED indicator.

## Quick Facts

- **Brand:** Holybro
- **Board Type:** module
- **Price:** ~$43.99
- **CPU:** u-blox M10 GNSS SoC
- **RAM:** N/A
- **Flash:** N/A
- **Power:** 3.3V via flight controller
- **Dimensions:** 50mm diameter x 14.4mm

## Components

- **u-blox M10** (GNSS Receiver): u-blox M10 GNSS receiver supporting GPS, GLONASS, Galileo, and BeiDou with up to 4 concurrent constellations — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcontent.u-blox.com%2Fsites%2Fdefault%2Ffiles%2FMAX-M10S_DataSheet_UBX-20035208.pdf&ref=openhardware.directory&product=holybro-m10-gps&source=md-export)
- **IST8310** (Magnetometer): 3-axis digital magnetometer for compass heading — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fintofpv.com%2Fattachment.php%3Faid%3D8104&ref=openhardware.directory&product=holybro-m10-gps&source=md-export)

## Protocols

- **UART**
- **I2C**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Holybro Official](https://openhardware.directory/r?to=https%3A%2F%2Fholybro.com%2Fproducts%2Fm10-gps&ref=openhardware.directory&product=holybro-m10-gps&source=md-export) — $43.99
- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fholybro-gps-m10n&ref=openhardware.directory&product=holybro-m10-gps&source=md-export) — €71.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fholybro.com%2Fproducts%2Fm10-gps&ref=openhardware.directory&product=holybro-m10-gps&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FPX4%2FPX4-Autopilot&ref=openhardware.directory&product=holybro-m10-gps&source=md-export)

## Tags

`gps`, `gnss`, `ublox`, `m10`, `holybro`, `pixhawk`, `drone`, `navigation`, `compass`, `magnetometer`

---
[View full device page](https://openhardware.directory/s/1370/holybro-m10-gps)

---

# BeagleConnect Freedom

> Open-source wireless IoT board with TI CC1352P7 dual-band radio (sub-GHz + 2.4 GHz), BLE 5.0, two mikroBUS sockets for 1,000+ Click boards, and Zephyr RTOS. Designed for long-range wireless sensor networks up to 1 km.

## Quick Facts

- **Brand:** BeagleBoard.org
- **Board Type:** CC1352P7
- **Price:** ~$29.67
- **CPU:** ARM Cortex-M4F @ 48MHz, FPU, DSP
- **RAM:** 144 KB SRAM + 8 KB cache
- **Flash:** 704 KB + 2 MB external SPI
- **USB:** USB-C (via MSP430 bridge)
- **Power:** 5V via USB-C or battery

## Connectivity

Bluetooth Bluetooth 5.0 BLE

## Compatible Firmware

- Zephyr RTOS
- micropython

## Components

- **TI CC1352P7** (MCU): TI SimpleLink multi-band wireless MCU with ARM Cortex-M4F @ 48MHz, 704KB flash, 144KB SRAM, supporting sub-1 GHz (287-1054 MHz) and 2.4 GHz bands for BLE 5.0, IEEE 802.15.4, Wi-SUN, and Sidewalk — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fcc1352p7.pdf&ref=openhardware.directory&product=beagleconnect-freedom&source=md-export)
- **TI MSP430F5503** (MCU): TI MSP430 mixed-signal microcontroller with 32KB flash and 4KB RAM, serving as USB-to-UART bridge for serial console and firmware updates — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FMSP430F5503&ref=openhardware.directory&product=beagleconnect-freedom&source=md-export)
- **TI OPT3001** (Sensor): TI digital ambient light sensor measuring 0.01 to 83,000 lux with human-eye spectral response, I2C interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fopt3001.pdf&ref=openhardware.directory&product=beagleconnect-freedom&source=md-export)
- **TI HDC2010** (Sensor): TI integrated humidity and temperature sensor with ±2% RH accuracy and ±0.2°C accuracy, I2C interface, ultra-low power — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FHDC2010&ref=openhardware.directory&product=beagleconnect-freedom&source=md-export)
- **2MB SPI Flash** (Storage): 2MB SPI NOR flash memory for firmware storage, OTA updates, and data logging — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fcc1352p7.pdf&ref=openhardware.directory&product=beagleconnect-freedom&source=md-export)
- **TI BQ2104** (Battery Charger): TI battery charger for powering the board from rechargeable batteries in field deployments — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fcc1352p7.pdf&ref=openhardware.directory&product=beagleconnect-freedom&source=md-export)

## Protocols

- **UART** (UART0): TX=DIO13, RX=DIO12
- **UART** (UART1): TX=DIO22, RX=DIO21
- **I2C**: SCL=DIO25, SDA=DIO26
- **SPI**: SCK=DIO10, MOSI=DIO9, MISO=DIO11, CS_FLASH=DIO8, CS_MB1=DIO28, CS_MB2=DIO27
- **USB**
- **IEEE 802.15.4**
- **BLE**
- **mikroBUS**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| DIO5 | Reset mikroBUS 2 | — | — |
| DIO6 | Reset mikroBUS 1 | — | — |
| DIO7 | Sensor Interrupt | — | — |
| DIO8 | SPI Flash CS | — | — |
| DIO9 | SPI MOSI | — | — |
| DIO10 | SPI SCK | — | — |
| DIO11 | SPI MISO | — | — |
| DIO12 | UART0 RX | — | — |
| DIO13 | UART0 TX | — | — |
| DIO14 | I2C Bus Control | — | — |
| DIO15 | User Boot Button | — | digital-input |
| DIO16 | mikroBUS 1 Interrupt | — | — |
| DIO17 | mikroBUS 1 PWM | — | pwm |
| DIO18 | Link LED | — | — |
| DIO19 | mikroBUS 2 PWM | — | pwm |
| DIO20 | mikroBUS 2 Interrupt | — | — |
| DIO21 | UART1 RX | — | — |
| DIO22 | UART1 TX | — | — |
| DIO23 | mikroBUS 1 Analog | — | adc |
| DIO24 | mikroBUS 2 Analog | — | adc |
| DIO25 | I2C SCL | — | — |
| DIO26 | I2C SDA | — | — |
| DIO27 | SPI CS mikroBUS 2 | — | — |
| DIO28 | SPI CS mikroBUS 1 | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Electromaker](https://openhardware.directory/r?to=https%3A%2F%2Felectromaker.io%2Fshop%2Fproduct%2Fbeagleconnect-freedom&ref=openhardware.directory&product=beagleconnect-freedom&source=md-export) — $29.67
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2F102110577&ref=openhardware.directory&product=beagleconnect-freedom&source=md-export) — $29.67
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2F102110577&ref=openhardware.directory&product=beagleconnect-freedom&source=md-export) — $29.67
- [Farnell](https://openhardware.directory/r?to=https%3A%2F%2Fwww.farnell.com%2F&ref=openhardware.directory&product=beagleconnect-freedom&source=md-export) — $29.67

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.beagleboard.org%2Fboards%2Fbeagleconnect-freedom&ref=openhardware.directory&product=beagleconnect-freedom&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgit.beagleboard.org%2Fbeagleconnect%2Ffreedom&ref=openhardware.directory&product=beagleconnect-freedom&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.beagleboard.org%2Fboards%2Fbeagleconnect%2Ffreedom%2Findex.html&ref=openhardware.directory&product=beagleconnect-freedom&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fcc1352p7.pdf&ref=openhardware.directory&product=beagleconnect-freedom&source=md-export)

## Tags

`beagleboard`, `cc1352`, `sub-ghz`, `iot`, `wireless`, `zephyr`, `mikrobus`, `sensor-network`, `open-hardware`, `ti`

---
[View full device page](https://openhardware.directory/s/1370/beagleconnect-freedom)

---

# LattePanda Mu N100

> Card-sized x86 compute module with Intel N100 quad-core (up to 3.4GHz), 8GB LPDDR5, 64GB eMMC, 9 PCIe 3.0 lanes, triple display output, and open-source KiCAD carrier board design for custom embedded systems.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** compute-module
- **Price:** ~$149
- **CPU:** Intel N100 quad-core @ 3.4GHz turbo, Intel UHD Graphics
- **RAM:** 8GB LPDDR5 4800MT/s (IBECC)
- **Flash:** 64GB eMMC 5.1
- **Power:** 9-20V DC input
- **Dimensions:** 69.6 × 60mm

## Components

- **Intel-N100** (sbc): Intel Processor N100 quad-core x86 CPU at up to 3.4GHz with Intel UHD Graphics and configurable 6-35W TDP. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.intel.com%2Fcontent%2Fwww%2Fus%2Fen%2Fproducts%2Fsku%2F231803%2Fintel-processor-n100-6m-cache-up-to-3-40-ghz%2Fspecifications.html&ref=openhardware.directory&product=lattepanda-mu-n100&source=md-export)

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2820.html&ref=openhardware.directory&product=lattepanda-mu-n100&source=md-export) — 149.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2820.html&ref=openhardware.directory&product=lattepanda-mu-n100&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLattePandaTeam%2FLattePanda-Mu&ref=openhardware.directory&product=lattepanda-mu-n100&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.lattepanda.com%2Fcontent%2Fmu_edition%2Fget_started%2F&ref=openhardware.directory&product=lattepanda-mu-n100&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/lattepanda-mu-n100)

---

# LattePanda Mu N305

> Card-sized x86 compute module with Intel Core i3-N305 8-core (up to 3.8GHz), 16GB LPDDR5, 64GB eMMC, 9 PCIe 3.0 lanes, triple display output, and open-source KiCAD carrier board design.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** compute-module
- **Price:** ~$269
- **CPU:** Intel Core i3-N305 8-core @ 3.8GHz turbo, Intel UHD Graphics
- **RAM:** 16GB LPDDR5 4800MT/s (IBECC)
- **Flash:** 64GB eMMC 5.1
- **Power:** 9-20V DC input
- **Dimensions:** 69.6 × 60mm

## Components

- **Intel-i3-N305** (sbc): Intel Core i3-N305 8-core x86 CPU at up to 3.8GHz with Intel UHD Graphics and configurable 9-35W TDP. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.intel.com%2Fcontent%2Fwww%2Fus%2Fen%2Fproducts%2Fsku%2F231804%2Fintel-core-i3n305-processor-6m-cache-up-to-3-80-ghz%2Fspecifications.html&ref=openhardware.directory&product=lattepanda-mu-n305&source=md-export)

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2902.html&ref=openhardware.directory&product=lattepanda-mu-n305&source=md-export) — 269.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2902.html&ref=openhardware.directory&product=lattepanda-mu-n305&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLattePandaTeam%2FLattePanda-Mu&ref=openhardware.directory&product=lattepanda-mu-n305&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.lattepanda.com%2Fcontent%2Fmu_edition%2Fget_started%2F&ref=openhardware.directory&product=lattepanda-mu-n305&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/lattepanda-mu-n305)

---

# DFRobot Beetle BLE

> Ultra-compact Arduino Uno-compatible board with BLE 4.0 (CC2540), ATmega328P, sewable gold-plated I/O pads, and wireless programming in a 28.8x33.1mm wearable form factor.

## Quick Facts

- **Brand:** DFRobot
- **Price:** ~$14.9
- **CPU:** AVR 8-bit single-core @ 16MHz
- **RAM:** 2KB SRAM
- **Flash:** 32KB
- **USB:** Micro-USB
- **Power:** 5V USB / VIN (< 8V)
- **Dimensions:** 28.8 × 33.1mm

## Connectivity

Bluetooth BLE 4.0

## Components

- **ATmega328P** (mcu): Microchip ATmega328P running at 16MHz with 32KB flash, 2KB SRAM, and 1KB EEPROM. Fully compatible with Arduino Uno. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf&ref=openhardware.directory&product=dfrobot-beetle-ble&source=md-export)
- **CC2540** (ble-radio): Texas Instruments CC2540 Bluetooth Low Energy 4.0 SoC with -93dBm sensitivity, 50m range, supporting HID and iBeacon profiles. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fcc2540.pdf&ref=openhardware.directory&product=dfrobot-beetle-ble&source=md-export)

## Protocols

- **I2C** (I2C0): SDA=A2, SCL=A3
- **UART** (Serial): TX=TX, RX=RX

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D2 | Digital I/O | — | digital-input, digital-output |
| D3 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| D4 | Digital I/O | — | digital-input, digital-output |
| D5 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| A0 | Analog Input | — | digital-input, digital-output, adc |
| A1 | Analog Input | — | digital-input, digital-output, adc |
| A2 | Analog Input / I2C SDA | — | digital-input, digital-output, adc |
| A3 | Analog Input / I2C SCL | — | digital-input, digital-output, adc |
| TX | UART Transmit | — | digital-input, digital-output |
| RX | UART Receive | — | digital-input, digital-output |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1259.html&ref=openhardware.directory&product=dfrobot-beetle-ble&source=md-export) — $14.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1259.html&ref=openhardware.directory&product=dfrobot-beetle-ble&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FArduinolibrary%2FDFRobot_Bluno_Bettle&ref=openhardware.directory&product=dfrobot-beetle-ble&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FBluno_Beetle_SKU_DFR0339&ref=openhardware.directory&product=dfrobot-beetle-ble&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FArduinolibrary%2FDFRobot_Bluno_Bettle%2Fblob%2Fmaster%2FDFR0339-Bluno%2520beetle%2520V1.0.pdf&ref=openhardware.directory&product=dfrobot-beetle-ble&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-beetle-ble)

---

# DFRobot Beetle Board

> The original coin-sized Arduino Leonardo-compatible board with ATmega32U4, native USB, 10 digital and 5 analog pins, and sewable gold-plated pads in a 20x22mm form factor.

## Quick Facts

- **Brand:** DFRobot
- **Price:** ~$8.9
- **CPU:** AVR 8-bit single-core @ 16MHz
- **RAM:** 2.5KB SRAM
- **Flash:** 32KB
- **USB:** Micro-USB (native USB 2.0 Full-speed)
- **Power:** 5V via Micro-USB
- **Dimensions:** 20 × 22 × 3.8mm

## Components

- **ATmega32U4** (mcu): Microchip ATmega32U4 running at 16MHz with 32KB flash, 2.5KB SRAM, 1KB EEPROM, native USB 2.0, 12-channel 10-bit ADC. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2Fdevicedoc%2Fatmel-7766-8-bit-avr-atmega16u4-32u4_datasheet.pdf&ref=openhardware.directory&product=dfrobot-beetle-board&source=md-export)

## Protocols

- **I2C** (I2C0): SDA=D1, SCL=D0
- **UART** (Serial1): TX=D1, RX=D0
- **SPI** (SPI0): MOSI=MOSI, MISO=MISO

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX / I2C SCL | — | digital-input, digital-output |
| D1 | UART TX / I2C SDA | — | digital-input, digital-output |
| D2 | Digital I/O | — | digital-input, digital-output |
| D3 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| D5 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| D9 | Digital I/O / PWM / Analog A9 | — | digital-input, digital-output, pwm, adc |
| D10 | Digital I/O / PWM / Analog A10 | — | digital-input, digital-output, pwm, adc |
| D11 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| A0 | Analog Input | — | digital-input, digital-output, adc |
| A1 | Analog Input | — | digital-input, digital-output, adc |
| A2 | Analog Input | — | digital-input, digital-output, adc |
| SDA | I2C Data | — | digital-input, digital-output |
| SCL | I2C Clock | — | digital-input, digital-output |
| MOSI | SPI MOSI | — | digital-input, digital-output |
| MISO | SPI MISO | — | digital-input, digital-output |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1075.html&ref=openhardware.directory&product=dfrobot-beetle-board&source=md-export) — $8.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1075.html&ref=openhardware.directory&product=dfrobot-beetle-board&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FBeetle_SKU_DFR0282&ref=openhardware.directory&product=dfrobot-beetle-board&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2Fdevicedoc%2Fatmel-7766-8-bit-avr-atmega16u4-32u4_datasheet.pdf&ref=openhardware.directory&product=dfrobot-beetle-board&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdfimg.dfrobot.com%2Fenshop%2Fimage%2Fdata%2FDFR0282%2FBeetle%2520Sch.pdf&ref=openhardware.directory&product=dfrobot-beetle-board&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-beetle-board)

---

# SparkFun Thing Plus Matter - MGM240P

> Feather-compatible Matter/Thread/Zigbee/BLE dev board based on Silicon Labs MGM240P with Qwiic, LiPo charging, microSD, and +20dBm radio range.

## Quick Facts

- **Brand:** SparkFun
- **Board Type:** dev-board
- **Price:** ~$27.95
- **CPU:** ARM Cortex-M33 @ 78MHz, FPU, DSP, Secure Vault
- **RAM:** 256KB SRAM
- **Flash:** 1536KB
- **USB:** USB-C
- **Power:** USB-C or 2-pin JST LiPo
- **Dimensions:** 58.42 × 22.86mm

## Connectivity

Bluetooth BLE 5.3 | Zigbee Zigbee 3.0

## Compatible Firmware

- arduino
- zephyr

## Components

- **MGM240P** (mcu): Silicon Labs MGM240P multiprotocol wireless module, ARM Cortex-M33 @ 78MHz, 1536KB flash, 256KB RAM, +20dBm TX, Matter/Thread/Zigbee/BLE 5.3. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F1%2F4%2F5%2Fe%2F5%2FMGM240P-Datasheet.pdf&ref=openhardware.directory&product=sparkfun-thing-plus-matter-mgm240p&source=md-export)
- **MCP73831** (battery-charger): Microchip MCP73831 single-cell LiPo charger, selectable 100mA or 500mA charge rate. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FMCP73831-Family-Data-Sheet-DS20001984H.pdf&ref=openhardware.directory&product=sparkfun-thing-plus-matter-mgm240p&source=md-export)
- **MAX17048** (battery-gauge): Maxim MAX17048 fuel gauge IC for accurate battery state-of-charge measurement via I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX17048-MAX17049.pdf&ref=openhardware.directory&product=sparkfun-thing-plus-matter-mgm240p&source=md-export)

## Protocols

- **I2C**: SDA=SDA, SCL=SCL
- **SPI**: POCI=POCI, PICO=PICO, SCK=SCK
- **UART**: TX=TX, RX=RX

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| TX | UART TX | — | digital-input, digital-output |
| RX | UART RX | — | digital-input, digital-output |
| SDA | I2C SDA | — | digital-input, digital-output |
| SCL | I2C SCL | — | digital-input, digital-output |
| POCI | SPI POCI | — | digital-input |
| PICO | SPI PICO | — | digital-output |
| SCK | SPI CLK | — | digital-output |
| A0 | Analog 0 | — | digital-input, digital-output, adc |
| A1 | Analog 1 | — | digital-input, digital-output, adc |
| A2 | Analog 2 | — | digital-input, digital-output, adc |
| A3 | Analog 3 | — | digital-input, digital-output, adc |
| A4 | Analog 4 | — | digital-input, digital-output, adc |
| A5 | Analog 5 | — | digital-input, digital-output, adc |
| GPIO0 | GPIO 0 | — | digital-input, digital-output |
| GPIO1 | GPIO 1 | — | digital-input, digital-output |
| GPIO2 | GPIO 2 | — | digital-input, digital-output |
| GPIO3 | GPIO 3 | — | digital-input, digital-output |
| GPIO4 | GPIO 4 | — | digital-input, digital-output |
| GPIO5 | GPIO 5 | — | digital-input, digital-output |
| GPIO6 | GPIO 6 | — | digital-input, digital-output |
| RST | Reset | — | — |
| EN | Enable | — | — |
| 3V3 | 3.3V Power | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [SparkFun](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sparkfun.com%2Fproducts%2F20270&ref=openhardware.directory&product=sparkfun-thing-plus-matter-mgm240p&source=md-export) — 27.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sparkfun.com%2Fproducts%2F20270&ref=openhardware.directory&product=sparkfun-thing-plus-matter-mgm240p&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsparkfun%2FSparkFun_Thing_Plus_MGM240P&ref=openhardware.directory&product=sparkfun-thing-plus-matter-mgm240p&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.sparkfun.com%2Ftutorials%2Fsparkfun-thing-plus-matter---mgm240p-hookup-guide%2Fall&ref=openhardware.directory&product=sparkfun-thing-plus-matter-mgm240p&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F1%2F4%2F5%2Fe%2F5%2FMGM240P-Datasheet.pdf&ref=openhardware.directory&product=sparkfun-thing-plus-matter-mgm240p&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F0%2Ff%2F8%2F4%2F9%2FThing_Plus_MGM240P.pdf&ref=openhardware.directory&product=sparkfun-thing-plus-matter-mgm240p&source=md-export)

## Tags

`matter`, `thread`, `zigbee`, `ble`, `silicon-labs`, `feather`, `qwiic`, `lipo`, `arm-cortex-m33`, `smart-home`

---
[View full device page](https://openhardware.directory/s/1370/sparkfun-thing-plus-matter-mgm240p)

---

# Khadas Edge 2

> Ultra-thin 82×57.5×5.7mm RK3588S SBC with WiFi 6, Bluetooth 5.0, USB-C DisplayPort, four independent display outputs, and a 6 TOPS NPU — the thinnest RK3588S single-board computer available.

## Quick Facts

- **Brand:** Khadas
- **Price:** ~$229.9
- **CPU:** ARM Cortex-A76 ×4 @ 2.25GHz + Cortex-A55 ×4 @ 1.8GHz
- **RAM:** 8GB / 16GB LPDDR4X
- **Flash:** 32GB / 64GB eMMC 5.1
- **USB:** 1× USB 3.1 Type-A, 1× USB 2.0 Type-A, 1× USB 3.1 Type-C (DP + PD), 1× USB-C (power only)
- **Power:** USB-C PD
- **Dimensions:** 82 × 57.5 × 5.7mm

## Connectivity

WiFi 802.11 a/b/g/n/ac/ax (WiFi 6), 2×2 MIMO (AP6275P) | Bluetooth Bluetooth 5.0 (AP6275P)

## Components

- **RK3588S** (soc): Rockchip RK3588S2 (enhanced RK3588S): 4× Cortex-A76 @ 2.25GHz + 4× Cortex-A55 @ 1.8GHz, Mali-G610 MP4 GPU, 6 TOPS NPU, 8K H.265 decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=khadas-edge-2&source=md-export)
- **AP6275P** (module): AMPAK AP6275P PCIe WiFi 6 (802.11ax) + Bluetooth 5.0 module with 2×2 MIMO. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ampak.com.tw%2Fupload%2FAP6275P_DS_Rev.1.0.pdf&ref=openhardware.directory&product=khadas-edge-2&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| FPC1 Pin 1 | UART_TX | — | digital-output, uart |
| FPC1 Pin 2 | UART_RX | — | digital-input, uart |
| FPC1 Pin 3 | I2C_SDA | — | digital-input, digital-output, i2c |
| FPC1 Pin 4 | I2C_SCL | — | digital-input, digital-output, i2c |
| FPC1 Pin 5 | SPI_CLK | — | digital-output, spi |
| FPC1 Pin 6 | SPI_MOSI | — | digital-output, spi |
| FPC1 Pin 7 | SPI_MISO | — | digital-input, spi |
| FPC1 Pin 8 | SPI_CSn | — | digital-output, spi |
| FPC1 Pin 9 | PWM | — | digital-output, pwm |
| FPC1 Pin 10 | ADC | — | adc |
| FPC1 Pin 11 | GPIO | — | digital-input, digital-output |
| FPC1 Pin 12 | GPIO | — | digital-input, digital-output |
| FPC2 Pin 1 | I2S_CLK | — | digital-output, i2s |
| FPC2 Pin 2 | I2S_SDI | — | digital-input, i2s |
| FPC2 Pin 3 | I2S_SDO | — | digital-output, i2s |
| FPC2 Pin 4 | GPIO | — | digital-input, digital-output |
| FPC2 Pin 5 | GPIO | — | digital-input, digital-output |

## Where to Buy

- [Khadas](https://openhardware.directory/r?to=https%3A%2F%2Fwww.khadas.com%2Fedge2&ref=openhardware.directory&product=khadas-edge-2&source=md-export) — 229.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.khadas.com%2Fedge2&ref=openhardware.directory&product=khadas-edge-2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.khadas.com%2Fproducts%2Fsbc%2Fedge2%2Fstart&ref=openhardware.directory&product=khadas-edge-2&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdl.khadas.com%2Fproducts%2Fedge2%2Fspecs%2Fedge2-specs.pdf&ref=openhardware.directory&product=khadas-edge-2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fkhadas&ref=openhardware.directory&product=khadas-edge-2&source=md-export)

## Tags

`rk3588s`, `linux`, `arm`, `sbc`, `wifi6`, `npu`, `khadas`, `ultra-thin`, `ai`, `rockchip`

---
[View full device page](https://openhardware.directory/s/1370/khadas-edge-2)

---

# Radxa Rock 3A

> Affordable Rockchip RK3568 quad-core SBC from Radxa with up to 8GB LPDDR4, eMMC, microSD, Gigabit Ethernet, USB 3.0, PCIe, and M.2 expansion — no built-in WiFi, powered via USB-C or 12V DC.

## Quick Facts

- **Brand:** Radxa
- **Board Type:** linux-sbc
- **Price:** ~$30
- **CPU:** Rockchip RK3568
- **RAM:** 2GB / 4GB / 8GB LPDDR4
- **Flash:** eMMC socket (optional)
- **Power:** 5V via USB-C or 12V DC barrel jack

## Connectivity

Ethernet Gigabit (1 GbE)

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Frock3%2F3a&ref=openhardware.directory&product=radxa-rock-3a&source=md-export)
- [armbian](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Frock-3a%2F&ref=openhardware.directory&product=radxa-rock-3a&source=md-export)

## Tags

`radxa`, `rock3a`, `rk3568`, `sbc`, `linux`, `armbian`, `gigabit-ethernet`, `no-wifi`

---
[View full device page](https://openhardware.directory/s/1370/radxa-rock-3a)

---

# Banana Pi M2 Pro

> Banana Pi M2 Pro is a compact SBC powered by the Amlogic S905X3 with 2GB DDR4, 16GB eMMC, WiFi 5, Bluetooth 5.0, three USB 3.0 ports, and USB-C power input.

## Quick Facts

- **Brand:** Banana Pi
- **Board Type:** linux-sbc
- **Price:** ~$61
- **CPU:** Amlogic S905X3
- **RAM:** 2GB DDR4
- **Flash:** 16GB eMMC
- **USB:** 3x USB 3.0 + USB-C
- **Power:** 5V

## Connectivity

WiFi WiFi 5 (802.11ac) | Bluetooth BT 5.0 | Ethernet Gigabit Ethernet (10/100/1000M)

## Compatible Firmware

- armbian

## Components

- **Amlogic S905X3** (soc): Amlogic S905X3 quad-core Cortex-A55 SoC at 2.0GHz with Mali-G31 GPU and 4K H.265 hardware decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amlogic.com%2F%23Products%2F393%2Findex.html&ref=openhardware.directory&product=bananapi-m2-pro&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Banana Pi](https://openhardware.directory/r?to=https%3A%2F%2Fwww.banana-pi.org%2Fen%2Fbanana-pi-sbcs%2F53.html&ref=openhardware.directory&product=bananapi-m2-pro&source=md-export) — $61.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fbananapim2pro%2F&ref=openhardware.directory&product=bananapi-m2-pro&source=md-export)
- [vendor](https://openhardware.directory/r?to=https%3A%2F%2Fwww.banana-pi.org%2Fen%2Fbanana-pi-sbcs%2F53.html&ref=openhardware.directory&product=bananapi-m2-pro&source=md-export)

## Tags

`banana-pi`, `amlogic`, `s905x3`, `sbc`, `linux`, `armbian`, `wifi5`, `bluetooth`, `usb-c`, `single-board-computer`, `compact`

---
[View full device page](https://openhardware.directory/s/1370/bananapi-m2-pro)

---

# Radxa E25

> Fanless Rockchip RK3568J gateway and router board with dual 2.5GbE, 4x USB 3.0, mini-PCIe with SIM slot, M.2 NVMe, and 2GB/4GB LPDDR4 — designed for networking and industrial IoT.

## Quick Facts

- **Brand:** Radxa
- **Board Type:** linux-sbc
- **Price:** ~$79.99
- **CPU:** Rockchip RK3568J
- **RAM:** 2GB / 4GB LPDDR4
- **Flash:** 8GB eMMC
- **Power:** 12V DC barrel jack

## Connectivity

Ethernet 2x 2.5 GbE

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [ALLNET China](https://openhardware.directory/r?to=https%3A%2F%2Fshop.allnetchina.cn%2Fproducts%2Fradxa-e25&ref=openhardware.directory&product=radxa-e25&source=md-export) — $79.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Fnetwork-computer%2Fe25&ref=openhardware.directory&product=radxa-e25&source=md-export)
- [armbian](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fradxa-e25%2F&ref=openhardware.directory&product=radxa-e25&source=md-export)

## Tags

`radxa`, `e25`, `rk3568j`, `gateway`, `router`, `2.5gbe`, `linux`, `armbian`, `fanless`, `mini-pcie`

---
[View full device page](https://openhardware.directory/s/1370/radxa-e25)

---

# TI SK-AM68

> Texas Instruments SK-AM68 Starter Kit — quad-core Cortex-A72 evaluation board with 8GB LPDDR4 and 4 TOPS vision processing for industrial machine vision and edge AI.

## Quick Facts

- **Brand:** Texas Instruments
- **Board Type:** linux-sbc
- **Price:** ~$249
- **CPU:** ti-am68
- **RAM:** 8GB LPDDR4
- **Flash:** eMMC
- **USB:** USB-C, USB 3.0
- **Power:** 12V DC

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Ftexas-instruments%2FSK-AM68%2F22166060&ref=openhardware.directory&product=ti-sk-am68&source=md-export) — $249.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Ftool%2FSK-AM68&ref=openhardware.directory&product=ti-sk-am68&source=md-export)

## Tags

`linux-sbc`, `armbian`, `cortex-a72`, `industrial`, `texas-instruments`, `developer-kit`, `edge-ai`, `machine-vision`

---
[View full device page](https://openhardware.directory/s/1370/ti-sk-am68)

---

# Adafruit METRO 328

> Arduino UNO-compatible development board built around the ATmega328P at 16 MHz with 32KB flash, micro USB, and Adafruit's signature black PCB with gold-plated pads.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$17.5
- **CPU:** ATmega328P @ 16 MHz
- **RAM:** 2 KB
- **Flash:** 32 KB
- **Power:** 5V via Micro USB or 7-9V DC barrel jack
- **Dimensions:** 53 × 71 × 13 mm

## Compatible Firmware

- arduino
- platformio

## Components

- **ATmega328P** (mcu): 8-bit AVR RISC microcontroller at 16 MHz with 32KB flash, 2KB SRAM, 1KB EEPROM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf&ref=openhardware.directory&product=adafruit-metro-328&source=md-export)
- **CP2104** (usb-serial): Silicon Labs CP2104 USB-to-UART bridge providing USB connectivity for programming and serial communication — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2Fcp2104.pdf&ref=openhardware.directory&product=adafruit-metro-328&source=md-export)

## Protocols

- **UART**: TX=D1, RX=D0
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, SS=D10
- **I2C**: SDA=A4, SCL=A5
- **ICSP**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX | — | digital-input, digital-output |
| D1 | TX | — | digital-input, digital-output |
| D2 | GPIO / INT0 | — | digital-input, digital-output, interrupt |
| D3 | GPIO / INT1 / PWM | — | digital-input, digital-output, pwm, interrupt |
| D4 | GPIO | — | digital-input, digital-output |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D7 | GPIO | — | digital-input, digital-output |
| D8 | GPIO | — | digital-input, digital-output |
| D9 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D10 | SS / PWM | — | digital-input, digital-output, pwm |
| D11 | MOSI / PWM | — | digital-input, digital-output, pwm |
| D12 | MISO | — | digital-input, digital-output |
| D13 | SCK / LED | — | digital-input, digital-output |
| A0 | Analog 0 / D14 | — | analog-input, digital-input, digital-output |
| A1 | Analog 1 / D15 | — | analog-input, digital-input, digital-output |
| A2 | Analog 2 / D16 | — | analog-input, digital-input, digital-output |
| A3 | Analog 3 / D17 | — | analog-input, digital-input, digital-output |
| A4 | SDA / Analog 4 / D18 | — | analog-input, digital-input, digital-output |
| A5 | SCL / Analog 5 / D19 | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F50&ref=openhardware.directory&product=adafruit-metro-328&source=md-export) — 17.50

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F50&ref=openhardware.directory&product=adafruit-metro-328&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-METRO-328-PCB&ref=openhardware.directory&product=adafruit-metro-328&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf&ref=openhardware.directory&product=adafruit-metro-328&source=md-export)

## Tags

`arduino-compatible`, `atmega328p`, `avr`, `microcontroller`, `development-board`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-metro-328)

---

# Adafruit Metro M7 with microSD

> High-performance Arduino-compatible board powered by the NXP iMX RT1011 Cortex-M7 at 500 MHz, with 8MB QSPI flash, microSD slot, STEMMA QT, and USB-C.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$19.95
- **CPU:** NXP iMX RT1011
- **RAM:** 128 KB
- **Flash:** 8 MB
- **Power:** 5V via USB-C or 6-12V DC barrel jack
- **Dimensions:** 53.2 x 72 mm

## Compatible Firmware

- circuitpython
- C/C++

## Components

- **NXP iMX RT1011** (mcu): ARM Cortex-M7 crossover microcontroller at 500 MHz with 128KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FIMXRT1010CEC.pdf&ref=openhardware.directory&product=adafruit-metro-m7&source=md-export)
- **NeoPixel RGB LED** (led): Addressable RGB NeoPixel for status indication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=adafruit-metro-m7&source=md-export)

## Protocols

- **I2C**: SDA=A4, SCL=A5
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, CS=D10
- **UART**: TX=D1, RX=D0
- **SWD**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX | — | uart-rx, digital |
| D1 | TX | — | uart-tx, digital |
| A0 | A0 | — | analog, digital |
| A1 | A1 | — | analog, digital |
| A2 | A2 | — | analog, digital |
| A3 | A3 | — | analog, digital |
| A4 | SDA | — | i2c-sda, analog, digital |
| A5 | SCL | — | i2c-scl, analog, digital |
| D10 | CS | — | spi-cs, digital |
| D11 | MOSI | — | spi-mosi, digital |
| D12 | MISO | — | spi-miso, digital |
| D13 | SCK | — | spi-sck, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5600&ref=openhardware.directory&product=adafruit-metro-m7&source=md-export) — 19.95

## Available Software

- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_metro_m7_1011%2F&ref=openhardware.directory&product=adafruit-metro-m7&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5600&ref=openhardware.directory&product=adafruit-metro-m7&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-metro-m7-microsd&ref=openhardware.directory&product=adafruit-metro-m7&source=md-export)

## Tags

`adafruit`, `metro`, `imx-rt1011`, `cortex-m7`, `nxp`, `circuitpython`, `arduino-compatible`, `microsd`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-metro-m7)

---

# Seeeduino Cloud

> Arduino Yun-compatible board combining ATmega32u4 with a Dragino HE Linux WiFi module running OpenWRT. Features 802.11 b/g/n WiFi, Ethernet, 14 digital I/O pins, and USB host for IoT gateway applications.

## Quick Facts

- **Brand:** Seeed Studio
- **Board Type:** dev-board
- **Price:** ~$49.95
- **CPU:** ATmega32u4 @ 16 MHz + AR9331 Linux SoC
- **RAM:** 2.5KB SRAM (MCU)
- **Flash:** 32KB
- **Power:** 5V via Micro USB
- **Dimensions:** 75.1 × 53.39 × 11.5 mm

## Connectivity

WiFi 802.11 b/g/n | Ethernet 10/100 Mbps

## Compatible Firmware

- arduino
- openwrt

## Components

- **ATmega32u4** (mcu): 8-bit AVR microcontroller at 16MHz, 5V with native USB, 32KB flash, 2.5KB SRAM. — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.atmel.com%2FImages%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=seeeduino-cloud&source=md-export)
- **Dragino HE (AR9331)** (wifi-module): Dragino HE IoT module with Atheros AR9331 SoC running OpenWRT Linux, providing 802.11b/g/n WiFi and Ethernet. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3034%2FHE%2520WiFi%2520IoT%2520Module%2520datasheet.pdf&ref=openhardware.directory&product=seeeduino-cloud&source=md-export)

## Protocols

- **SPI**: MOSI=D11, MISO=D12, SCK=D13
- **I2C**: SDA=A4, SCL=A5
- **UART**: TX=D1, RX=D0
- **802.11 b/g/n**
- **Ethernet**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | — | — | UART RX |
| D1 | — | — | UART TX |
| D2 | — | — | GPIO, Interrupt |
| D3 | — | — | GPIO, PWM, Interrupt |
| D4 | — | — | GPIO |
| D5 | — | — | GPIO, PWM |
| D6 | — | — | GPIO, PWM |
| D7 | — | — | GPIO |
| D8 | — | — | GPIO |
| D9 | — | — | GPIO, PWM |
| D10 | — | — | GPIO, PWM |
| D11 | — | — | GPIO, PWM |
| D12 | — | — | GPIO |
| D13 | — | — | GPIO, LED |
| A0 | — | — | Analog In |
| A1 | — | — | Analog In |
| A2 | — | — | Analog In |
| A3 | — | — | Analog In |
| A4 | — | — | Analog In, I2C SDA |
| A5 | — | — | Analog In, I2C SCL |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3034&ref=openhardware.directory&product=seeeduino-cloud&source=md-export) — 49.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3034&ref=openhardware.directory&product=seeeduino-cloud&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2FSeeeduino_Cloud%2F&ref=openhardware.directory&product=seeeduino-cloud&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3034%2FHE%2520WiFi%2520IoT%2520Module%2520datasheet.pdf&ref=openhardware.directory&product=seeeduino-cloud&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3034%2FSeeeduino_Cloud_PDF.pdf&ref=openhardware.directory&product=seeeduino-cloud&source=md-export)

## Tags

`arduino-yun`, `atmega32u4`, `openwrt`, `wifi`, `ethernet`, `linux`, `iot-gateway`, `seeed-studio`

---
[View full device page](https://openhardware.directory/s/1370/seeeduino-cloud)

---

# Pycom Pytrack

> GPS/GNSS tracking expansion board for Pycom modules with GLONASS/Galileo/QZSS support, 3-axis accelerometer, MicroSD slot, LiPo charger, USB serial, and 5 extra GPIO headers. Ultra-low 1µA deep sleep current.

## Quick Facts

- **Brand:** Pycom
- **Board Type:** IoT Sensor Board
- **Price:** ~$49.95
- **CPU:** N/A (expansion board — CPU provided by attached Pycom module)
- **RAM:** N/A (provided by host module)
- **Flash:** N/A (provided by host module)
- **Power:** 5V via USB or LiPo battery via JST connector
- **Dimensions:** 55mm × 35mm × 10mm

## Compatible Firmware

- micropython

## Components

- **u-blox MAX-M8Q** (gps): Multi-constellation GNSS receiver supporting GPS, GLONASS, Galileo, and QZSS. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.u-blox.com%2Fsites%2Fdefault%2Ffiles%2FMAX-M8-FW3_DataSheet_%2528UBX-15031506%2529.pdf&ref=openhardware.directory&product=pycom-pytrack&source=md-export)
- **LIS2HH12** (imu): 12-bit 3-axis MEMS accelerometer for motion detection and tap sensing. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Flis2hh12.pdf&ref=openhardware.directory&product=pycom-pytrack&source=md-export)

## Protocols

- **undefined**
- **undefined**
- **undefined**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3506&ref=openhardware.directory&product=pycom-pytrack&source=md-export) — 49.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3506&ref=openhardware.directory&product=pycom-pytrack&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3506&ref=openhardware.directory&product=pycom-pytrack&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.pycom.io%2Fdatasheets%2Fexpansionboards%2Fpytrack%2F&ref=openhardware.directory&product=pycom-pytrack&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3506%2F3506_specsheet.pdf&ref=openhardware.directory&product=pycom-pytrack&source=md-export)
- [pinout](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3506%2F3506_pinout.pdf&ref=openhardware.directory&product=pycom-pytrack&source=md-export)

## Tags

`gps`, `gnss`, `glonass`, `tracker`, `iot`, `pycom`, `micropython`, `accelerometer`, `lipo`, `expansion-board`

---
[View full device page](https://openhardware.directory/s/1370/pycom-pytrack)

---

# Raspberry Pi Pico 2W

> The Raspberry Pi Pico 2W is a wireless microcontroller board built on the RP2350 chip, delivering dual Cortex-M33 or RISC-V cores at 150MHz with 2.4GHz WiFi 4 (WPA3), Bluetooth 5.2, and 4MB flash — a major step up from the RP2040-based Pico W.

## Quick Facts

- **Brand:** Raspberry Pi
- **Board Type:** rp2350
- **Price:** ~$7
- **CPU:** Dual ARM Cortex-M33 or dual RISC-V Hazard3 @ 150MHz (RP2350)
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C (USB 1.1 host/device)
- **Power:** 1.8–5.5V DC
- **Dimensions:** 51mm × 21mm

## Connectivity

WiFi 2.4GHz 802.11n (WiFi 4) WPA3 | Bluetooth Bluetooth 5.2 Classic + BLE

## Compatible Firmware

- circuitpython
- micropython
- arduino

## Components

- **RP2350** (mcu): Dual-core ARM Cortex-M33 or RISC-V Hazard3 at 150MHz with 520KB SRAM, 12 PIO state machines, hardware crypto, and TRNG. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=raspberry-pi-pico-2w&source=md-export)
- **CYW43439** (wireless): 2.4GHz 802.11n WiFi 4 with WPA3 and Bluetooth 5.2 Classic+BLE combo module providing wireless connectivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.infineon.com%2Fdgdl%2FInfineon-CYW43439-DataSheet-v07_00-EN.pdf%3FfileId%3D8ac78c8c7d0d8da4017d0eeb5ad10e0a&ref=openhardware.directory&product=raspberry-pi-pico-2w&source=md-export)

## Protocols

- **I2C**: SDA=GPIO4, SCL=GPIO5
- **SPI**: SCK=GPIO6, MOSI=GPIO7, MISO=GPIO8
- **UART**: TX=GPIO0, RX=GPIO1
- **PWM**
- **PIO**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | TX | — | uart-tx, digital |
| GPIO1 | RX | — | uart-rx, digital |
| GPIO2 | GPIO2 | — | digital |
| GPIO3 | GPIO3 | — | digital |
| GPIO4 | SDA | — | i2c-sda, digital |
| GPIO5 | SCL | — | i2c-scl, digital |
| GPIO6 | SCK | — | spi-sck, digital |
| GPIO7 | MOSI | — | spi-mosi, digital |
| GPIO8 | MISO | — | spi-miso, digital |
| GPIO9 | GPIO9 | — | digital |
| GPIO10 | GPIO10 | — | digital |
| GPIO11 | GPIO11 | — | digital |
| GPIO12 | GPIO12 | — | digital |
| GPIO13 | GPIO13 | — | digital |
| GPIO14 | GPIO14 | — | digital |
| GPIO15 | GPIO15 | — | digital |
| GPIO16 | GPIO16 | — | digital |
| GPIO17 | GPIO17 | — | digital |
| GPIO18 | GPIO18 | — | digital |
| GPIO19 | GPIO19 | — | digital |
| GPIO20 | GPIO20 | — | digital |
| GPIO21 | GPIO21 | — | digital |
| GPIO22 | GPIO22 | — | digital |
| GPIO26 | ADC0 | — | analog, digital |
| GPIO27 | ADC1 | — | analog, digital |
| GPIO28 | ADC2 | — | analog, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6087&ref=openhardware.directory&product=raspberry-pi-pico-2w&source=md-export) — $7.00

## Available Software

- [Raspberry Pi Pico SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fraspberrypi%2Fpico-sdk&ref=openhardware.directory&product=raspberry-pi-pico-2w&source=md-export)
- [CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fraspberry_pi_pico2_w%2F&ref=openhardware.directory&product=raspberry-pi-pico-2w&source=md-export)
- [MicroPython](https://openhardware.directory/r?to=https%3A%2F%2Fmicropython.org%2Fdownload%2FRPI_PICO2_W%2F&ref=openhardware.directory&product=raspberry-pi-pico-2w&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fproducts%2Fraspberry-pi-pico-2w%2F&ref=openhardware.directory&product=raspberry-pi-pico-2w&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fraspberrypi%2Fpico-sdk&ref=openhardware.directory&product=raspberry-pi-pico-2w&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=raspberry-pi-pico-2w&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fpicow%2FPicoW-A4-Pinout.pdf&ref=openhardware.directory&product=raspberry-pi-pico-2w&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fdocumentation%2Fmicrocontrollers%2Fpico-series.html&ref=openhardware.directory&product=raspberry-pi-pico-2w&source=md-export)

## Tags

`raspberry-pi`, `pico`, `rp2350`, `microcontroller`, `wifi`, `bluetooth`, `circuitpython`, `micropython`, `ble`, `wpa3`

## Certifications

CE, FCC, RoHS

---
[View full device page](https://openhardware.directory/s/1370/raspberry-pi-pico-2w)

---

# Adafruit Feather 32u4 RFM95 LoRa 868/915 MHz

> ATmega32u4 Feather board with RFM95W SX1276 LoRa radio for 868/915 MHz long-range communication. Achieves 2+ km range, supports spreading factors SF6-SF12, and includes a built-in LiPo charger.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$34.95
- **CPU:** ATmega32u4 @ 8 MHz
- **RAM:** 2.5KB SRAM
- **Flash:** 32KB
- **Power:** 5V + LiPo
- **Dimensions:** 51 × 23 × 8 mm

## Compatible Firmware

- arduino

## Components

- **ATmega32u4** (mcu): 8-bit AVR microcontroller at 8MHz, 3.3V, native USB, 32KB flash, 2.5KB SRAM. — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.atmel.com%2FImages%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-rfm95-lora-868-915&source=md-export)
- **RFM95W (SX1276)** (lora-module): HopeRF RFM95W LoRa module based on Semtech SX1276, 868/915MHz, +5 to +20dBm TX, SF6-SF12, >2km range. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3179%2Fsx1276_77_78_79.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-rfm95-lora-868-915&source=md-export)

## Protocols

- **SPI**: MOSI=D16, MISO=D14, SCK=D15
- **I2C**: SDA=D2, SCL=D3
- **UART**: TX=D1, RX=D0
- **LoRa**
- **LoRaWAN**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX — UART Receive | — | digital-input, digital-output |
| D1 | TX — UART Transmit | — | digital-input, digital-output |
| D5 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D9 | D9 — GPIO / PWM / Analog | — | digital-input, digital-output, pwm, analog-input |
| D10 | D10 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D16 | D11/MOSI — SPI MOSI | — | digital-input, digital-output |
| D14 | D12/MISO — SPI MISO | — | digital-input, digital-output |
| D15 | D13/SCK — SPI Clock / LED | — | digital-input, digital-output |
| D2 | SDA — I2C Data | — | digital-input, digital-output |
| D3 | SCL — I2C Clock | — | digital-input, digital-output |
| D15 | A0 — Analog In | — | analog-input |
| D4 | A1 — Analog In | — | analog-input |
| D5 | A2 — Analog In | — | analog-input |
| D12 | A3 — Analog In | — | analog-input |
| D24 | A4/SDA — Analog In / I2C SDA | — | analog-input, digital-input, digital-output |
| D25 | A5/SCL — Analog In / I2C SCL | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3078&ref=openhardware.directory&product=adafruit-feather-32u4-rfm95-lora-868-915&source=md-export) — 34.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3078&ref=openhardware.directory&product=adafruit-feather-32u4-rfm95-lora-868-915&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-32u4-RFM-LoRa-PCB&ref=openhardware.directory&product=adafruit-feather-32u4-rfm95-lora-868-915&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-32u4-radio-with-lora-radio-module%2Foverview&ref=openhardware.directory&product=adafruit-feather-32u4-rfm95-lora-868-915&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3179%2Fsx1276_77_78_79.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-rfm95-lora-868-915&source=md-export)

## Tags

`feather`, `lora`, `sx1276`, `rfm95`, `868mhz`, `915mhz`, `lorawan`, `atmega32u4`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-32u4-rfm95-lora-868-915)

---

# Adafruit Feather nRF52 Pro

> Bluetooth 5.0 LE Feather board with nRF52832 ARM Cortex M4F at 64MHz, 512KB flash, 64KB SRAM, Apache Mynewt bootloader, SWD debug port, and built-in LiPo charging. For advanced BLE 5.0 open-source applications.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$27.5
- **CPU:** Nordic nRF52832 ARM Cortex M4F
- **RAM:** 64 KB
- **Flash:** 512 KB
- **GPIO:** 19 pins
- **Power:** 5V via Micro USB or 3.7V LiPo via JST connector
- **Dimensions:** 50.8mm × 23mm × 7mm

## Connectivity

Bluetooth BLE 5.0

## Compatible Firmware

- arduino

## Components

- **nRF52832** (mcu): ARM Cortex-M4F at 64 MHz with 512KB flash, 64KB SRAM, BLE 5.0 radio up to +4dBm. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52832_PS_v1.8.pdf&ref=openhardware.directory&product=adafruit-feather-nrf52-pro&source=md-export)

## Protocols

- **I2C**: SDA=GPIO25, SCL=GPIO26
- **SPI**: MOSI=GPIO7, MISO=GPIO6, SCK=GPIO8
- **UART**: TX=GPIO6, RX=GPIO8
- **Bluetooth LE**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | A0 — ADC | — | analog-input, digital-input, digital-output, pwm |
| GPIO3 | A1 — ADC | — | analog-input, digital-input, digital-output, pwm |
| GPIO4 | A2 — ADC | — | analog-input, digital-input, digital-output |
| GPIO5 | A3 — ADC | — | analog-input, digital-input, digital-output |
| GPIO28 | A4 — ADC | — | analog-input, digital-input, digital-output |
| GPIO29 | A5 — ADC | — | analog-input, digital-input, digital-output |
| GPIO12 | D5 — GPIO/PWM | — | digital-input, digital-output, pwm |
| GPIO11 | D6 — GPIO/PWM | — | digital-input, digital-output, pwm |
| GPIO27 | D9 — GPIO/PWM | — | digital-input, digital-output, pwm |
| GPIO30 | D10 — GPIO/PWM | — | digital-input, digital-output, pwm |
| GPIO7 | D11 — MOSI | — | digital-input, digital-output |
| GPIO6 | D12 — MISO | — | digital-input, digital-output |
| GPIO8 | D13 — SCK | — | digital-input, digital-output |
| GPIO25 | SDA — I2C | — | digital-input, digital-output |
| GPIO26 | SCL — I2C | — | digital-input, digital-output |
| GPIO6 | TX — UART | — | digital-input, digital-output |
| GPIO8 | RX — UART | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3574&ref=openhardware.directory&product=adafruit-feather-nrf52-pro&source=md-export) — 27.5

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3574&ref=openhardware.directory&product=adafruit-feather-nrf52-pro&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3574&ref=openhardware.directory&product=adafruit-feather-nrf52-pro&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-nrf52-pro-feather&ref=openhardware.directory&product=adafruit-feather-nrf52-pro&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_nRF52_Arduino&ref=openhardware.directory&product=adafruit-feather-nrf52-pro&source=md-export)

## Tags

`ble`, `bluetooth`, `nrf52832`, `cortex-m4`, `feather`, `adafruit`, `mynewt`, `open-source`, `swd`

## Certifications

FCC, IC, TELEC

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-nrf52-pro)

---

# Adafruit Feather 32u4 RFM96 LoRa 433 MHz

> ATmega32u4 Feather board with RFM96W SX1278 LoRa radio for 433 MHz long-range communication. Achieves 2+ km range with quarter-wave antennas, supports LoRaWAN, and includes a built-in LiPo charger.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$34.95
- **CPU:** ATmega32u4 @ 8 MHz
- **RAM:** 2.5KB SRAM
- **Flash:** 32KB
- **Power:** 5V + LiPo
- **Dimensions:** 51 × 23 × 8 mm

## Compatible Firmware

- arduino

## Components

- **ATmega32u4** (mcu): 8-bit AVR microcontroller at 8MHz, 3.3V, native USB, 32KB flash, 2.5KB SRAM. — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.atmel.com%2FImages%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-rfm96-lora-433&source=md-export)
- **RFM96W (SX1278)** (lora-module): HopeRF RFM96W LoRa module based on Semtech SX1278, 433MHz, +5 to +20dBm TX, SF6-SF12, >2km range. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3179%2Fsx1276_77_78_79.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-rfm96-lora-433&source=md-export)

## Protocols

- **SPI**: MOSI=D16, MISO=D14, SCK=D15
- **I2C**: SDA=D2, SCL=D3
- **UART**: TX=D1, RX=D0
- **LoRa**
- **LoRaWAN**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX — UART Receive | — | digital-input, digital-output |
| D1 | TX — UART Transmit | — | digital-input, digital-output |
| D5 | D5 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | D6 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D9 | D9 — GPIO / PWM / Analog | — | digital-input, digital-output, pwm, analog-input |
| D10 | D10 — GPIO / PWM | — | digital-input, digital-output, pwm |
| D16 | D11/MOSI — SPI MOSI | — | digital-input, digital-output |
| D14 | D12/MISO — SPI MISO | — | digital-input, digital-output |
| D15 | D13/SCK — SPI Clock / LED | — | digital-input, digital-output |
| D2 | SDA — I2C Data | — | digital-input, digital-output |
| D3 | SCL — I2C Clock | — | digital-input, digital-output |
| D15 | A0 — Analog In | — | analog-input |
| D4 | A1 — Analog In | — | analog-input |
| D5 | A2 — Analog In | — | analog-input |
| D12 | A3 — Analog In | — | analog-input |
| D24 | A4/SDA — Analog In / I2C SDA | — | analog-input, digital-input, digital-output |
| D25 | A5/SCL — Analog In / I2C SCL | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3079&ref=openhardware.directory&product=adafruit-feather-32u4-rfm96-lora-433&source=md-export) — 34.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3079&ref=openhardware.directory&product=adafruit-feather-32u4-rfm96-lora-433&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Feather-32u4-RFM-LoRa-PCB&ref=openhardware.directory&product=adafruit-feather-32u4-rfm96-lora-433&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-feather-32u4-radio-with-lora-radio-module%2Foverview&ref=openhardware.directory&product=adafruit-feather-32u4-rfm96-lora-433&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3179%2Fsx1276_77_78_79.pdf&ref=openhardware.directory&product=adafruit-feather-32u4-rfm96-lora-433&source=md-export)

## Tags

`feather`, `lora`, `sx1278`, `rfm96`, `433mhz`, `lorawan`, `atmega32u4`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-32u4-rfm96-lora-433)

---

# Raspberry Pi Zero 2 W

> Credit-card-tiny Linux SBC with a quad-core Cortex-A53 at 1 GHz, 512 MB RAM, 2.4 GHz WiFi, Bluetooth 4.2, a 40-pin GPIO header footprint, mini HDMI, and a CSI camera connector.

## Quick Facts

- **Brand:** Raspberry Pi
- **Board Type:** sbc
- **Price:** ~$15
- **CPU:** Broadcom BCM2710A1 quad-core 64-bit ARM Cortex-A53 @ 1 GHz
- **RAM:** 512 MB LPDDR2 SDRAM
- **Flash:** none
- **Power:** 5V via Micro USB
- **Dimensions:** 65 × 30 × 5.3 mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 4.2

## Compatible Firmware

- arduino

## Components

- **BCM2710A1 (RP3A0)** (mcu): Broadcom BCM2710A1 quad-core 64-bit ARM Cortex-A53 SoC at 1 GHz packaged in Raspberry Pi's custom RP3A0 multi-chip module with 512 MB LPDDR2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frpi-zero-2-w%2Fraspberry-pi-zero-2-w-product-brief.pdf&ref=openhardware.directory&product=raspberry-pi-zero-2-w&source=md-export)
- **BCM43436** (wireless): Broadcom BCM43436 2.4 GHz 802.11 b/g/n WiFi and Bluetooth 4.2 / BLE combo radio chip. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frpi-zero-2-w%2Fraspberry-pi-zero-2-w-product-brief.pdf&ref=openhardware.directory&product=raspberry-pi-zero-2-w&source=md-export)

## Protocols

- **I2C**: SDA=GPIO2, SCL=GPIO3
- **SPI**: MOSI=GPIO10, MISO=GPIO9, SCK=GPIO11, CE0=GPIO8, CE1=GPIO7
- **UART**: TX=GPIO14, RX=GPIO15
- **USB**
- **HDMI**
- **CSI**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | SDA — I2C1 Data (Pin 3) | — | i2c, digital-input, digital-output |
| GPIO3 | SCL — I2C1 Clock (Pin 5) | — | i2c, digital-input, digital-output |
| GPIO4 | GPIO4 — General Purpose (Pin 7) | — | digital-input, digital-output, pwm |
| GPIO5 | GPIO5 — General Purpose (Pin 29) | — | digital-input, digital-output |
| GPIO6 | GPIO6 — General Purpose (Pin 31) | — | digital-input, digital-output |
| GPIO7 | CE1 — SPI0 Chip Enable 1 (Pin 26) | — | spi, digital-input, digital-output |
| GPIO8 | CE0 — SPI0 Chip Enable 0 (Pin 24) | — | spi, digital-input, digital-output |
| GPIO9 | MISO — SPI0 MISO (Pin 21) | — | spi, digital-input, digital-output |
| GPIO10 | MOSI — SPI0 MOSI (Pin 19) | — | spi, digital-input, digital-output |
| GPIO11 | SCLK — SPI0 Clock (Pin 23) | — | spi, digital-input, digital-output |
| GPIO14 | TXD — UART0 Transmit (Pin 8) | — | uart, digital-input, digital-output |
| GPIO15 | RXD — UART0 Receive (Pin 10) | — | uart, digital-input, digital-output |
| GPIO17 | GPIO17 — General Purpose (Pin 11) | — | digital-input, digital-output |
| GPIO18 | GPIO18 — PWM0 / PCM CLK (Pin 12) | — | digital-input, digital-output, pwm |
| GPIO22 | GPIO22 — General Purpose (Pin 15) | — | digital-input, digital-output |
| GPIO23 | GPIO23 — General Purpose (Pin 16) | — | digital-input, digital-output |
| GPIO24 | GPIO24 — General Purpose (Pin 18) | — | digital-input, digital-output |
| GPIO25 | GPIO25 — General Purpose (Pin 22) | — | digital-input, digital-output |
| GPIO27 | GPIO27 — General Purpose (Pin 13) | — | digital-input, digital-output |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5291&ref=openhardware.directory&product=raspberry-pi-zero-2-w&source=md-export) — 19.05

## Available Software

- [Raspberry Pi OS](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fsoftware%2F&ref=openhardware.directory&product=raspberry-pi-zero-2-w&source=md-export)
- [Home Assistant OS](https://openhardware.directory/r?to=https%3A%2F%2Fwww.home-assistant.io%2Finstallation%2Fraspberrypi&ref=openhardware.directory&product=raspberry-pi-zero-2-w&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5291&ref=openhardware.directory&product=raspberry-pi-zero-2-w&source=md-export)
- [manufacturer](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fproducts%2Fraspberry-pi-zero-2-w%2F&ref=openhardware.directory&product=raspberry-pi-zero-2-w&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frpi-zero-2-w%2Fraspberry-pi-zero-2-w-product-brief.pdf&ref=openhardware.directory&product=raspberry-pi-zero-2-w&source=md-export)

## Tags

`raspberry-pi`, `zero-2-w`, `linux`, `sbc`, `wifi`, `bluetooth`, `arm-cortex-a53`, `40-pin-gpio`, `csi-camera`

---
[View full device page](https://openhardware.directory/s/1370/raspberry-pi-zero-2-w)

---

# Netduino 3

> The Netduino 3 is an open-source .NET Micro Framework development board powered by the STM32F427VG ARM Cortex-M4 at 168MHz, featuring Arduino shield compatibility, 3 GOBUS ports, and 6 analog input channels for C# embedded development.

## Quick Facts

- **Brand:** Netduino
- **Board Type:** dev-board
- **Price:** ~$39.95
- **CPU:** STM32F427 ARM Cortex-M4 @ 168MHz
- **RAM:** 164+ KB
- **Flash:** 1408 KB
- **Power:** 7.5–12V DC or USB
- **Dimensions:** 79.5mm × 53.3mm × 12.3mm

## Compatible Firmware

- dotnet-micro-framework

## Components

- **STM32F427VG** (mcu): ST Microelectronics STM32F427VG ARM Cortex-M4F at 168MHz with FPU, 1408KB flash, 164KB+ RAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F2682%2FDM00071990.pdf&ref=openhardware.directory&product=netduino-3&source=md-export)

## Protocols

- **I2C**: SDA=A4, SCL=A5
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, CS=D10
- **UART**: TX=D1, RX=D0
- **PWM**
- **GOBUS**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | D0 | — | GPIO, UART RX |
| D1 | D1 | — | GPIO, UART TX |
| D2 | D2 | — | GPIO |
| D3 | D3 | — | GPIO, PWM |
| D4 | D4 | — | GPIO |
| D5 | D5 | — | GPIO, PWM |
| D6 | D6 | — | GPIO, PWM |
| D7 | D7 | — | GPIO |
| D8 | D8 | — | GPIO |
| D9 | D9 | — | GPIO, PWM |
| D10 | D10 | — | GPIO, SPI CS |
| D11 | D11 | — | GPIO, SPI MOSI |
| D12 | D12 | — | GPIO, SPI MISO |
| D13 | D13 | — | GPIO, SPI CLK |
| A0 | A0 | — | GPIO, ADC |
| A1 | A1 | — | GPIO, ADC |
| A2 | A2 | — | GPIO, ADC |
| A3 | A3 | — | GPIO, ADC |
| A4 | A4 | — | GPIO, ADC, I2C SDA |
| A5 | A5 | — | GPIO, ADC, I2C SCL |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2682&ref=openhardware.directory&product=netduino-3&source=md-export) — $39.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2682&ref=openhardware.directory&product=netduino-3&source=md-export)
- [docs](https://openhardware.directory/r?to=http%3A%2F%2Fforums.netduino.com%2F&ref=openhardware.directory&product=netduino-3&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F2682%2Fnetduino3_schematic.pdf&ref=openhardware.directory&product=netduino-3&source=md-export)

## Tags

`netduino`, `dotnet`, `arduino-compatible`, `cortex-m4`, `csharp`, `stm32`

---
[View full device page](https://openhardware.directory/s/1370/netduino-3)

---

# Raspberry Pi 500+

> The Raspberry Pi 500+ is a premium all-in-one keyboard computer with the Raspberry Pi 5 processor, 16GB LPDDR4X RAM, 256GB internal NVMe SSD, mechanical Gateron KS-33 switches with RGB, dual-band WiFi 5, Bluetooth 5.0, and a 40-pin GPIO header — a complete high-performance desktop in a keyboard.

## Quick Facts

- **Brand:** Raspberry Pi
- **Board Type:** keyboard-computer
- **Price:** ~$260
- **CPU:** ARM Cortex-A76 quad-core @ 2.4GHz, VideoCore VII GPU
- **RAM:** 16GB LPDDR4X
- **Flash:** 256GB NVMe SSD (internal)
- **USB:** 2× USB 3.0 + 1× USB 2.0 + USB-C (power)
- **Power:** 5V DC via USB-C

## Connectivity

WiFi 2.4GHz / 5GHz 802.11ac (WiFi 5) | Bluetooth Bluetooth 5.0 / BLE | Ethernet Gigabit Ethernet

## Compatible Firmware

- raspberry-pi-os
- ubuntu

## Components

- **BCM2712** (mcu): Quad-core 64-bit ARM Cortex-A76 at 2.4GHz with VideoCore VII GPU, identical core silicon to the Raspberry Pi 5. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frpi5%2Fraspberry-pi-5-product-brief.pdf&ref=openhardware.directory&product=raspberry-pi-500-plus&source=md-export)
- **256GB NVMe SSD** (storage): Built-in M.2 NVMe SSD providing fast, durable internal storage. Expandable up to M.2 2280 form factor. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fdocumentation%2Fcomputers%2Fkeyboard-computers.html&ref=openhardware.directory&product=raspberry-pi-500-plus&source=md-export)

## Protocols

- **I2C**: SDA=GPIO2, SCL=GPIO3
- **SPI**: MOSI=GPIO10, MISO=GPIO9, SCK=GPIO11, CE0=GPIO8, CE1=GPIO7
- **UART**: TX=GPIO14, RX=GPIO15
- **PWM**
- **PCIe 2.0**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| 1 | 3V3 | power | — |
| 2 | 5V | power | — |
| 3 | GPIO2 | gpio | I2C1 SDA |
| 4 | 5V | power | — |
| 5 | GPIO3 | gpio | I2C1 SCL |
| 6 | GND | ground | — |
| 7 | GPIO4 | gpio | GPCLK0 |
| 8 | GPIO14 | gpio | UART0 TX |
| 9 | GND | ground | — |
| 10 | GPIO15 | gpio | UART0 RX |
| 11 | GPIO17 | gpio | — |
| 12 | GPIO18 | gpio | PWM0 |
| 13 | GPIO27 | gpio | — |
| 14 | GND | ground | — |
| 15 | GPIO22 | gpio | — |
| 16 | GPIO23 | gpio | — |
| 17 | 3V3 | power | — |
| 18 | GPIO24 | gpio | — |
| 19 | GPIO10 | gpio | SPI0 MOSI |
| 20 | GND | ground | — |
| 21 | GPIO9 | gpio | SPI0 MISO |
| 22 | GPIO25 | gpio | — |
| 23 | GPIO11 | gpio | SPI0 CLK |
| 24 | GPIO8 | gpio | SPI0 CE0 |
| 25 | GND | ground | — |
| 26 | GPIO7 | gpio | SPI0 CE1 |
| 27 | ID_SD | gpio | I2C0 SDA |
| 28 | ID_SC | gpio | I2C0 SCL |
| 29 | GPIO5 | gpio | — |
| 30 | GND | ground | — |
| 31 | GPIO6 | gpio | — |
| 32 | GPIO12 | gpio | PWM0 |
| 33 | GPIO13 | gpio | PWM1 |
| 34 | GND | ground | — |
| 35 | GPIO19 | gpio | PWM1 |
| 36 | GPIO16 | gpio | — |
| 37 | GPIO26 | gpio | — |
| 38 | GPIO20 | gpio | — |
| 39 | GND | ground | — |
| 40 | GPIO21 | gpio | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6416&ref=openhardware.directory&product=raspberry-pi-500-plus&source=md-export) — $260.00

## Available Software

- [Raspberry Pi OS](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fsoftware%2F&ref=openhardware.directory&product=raspberry-pi-500-plus&source=md-export)
- [Raspberry Pi Imager](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fsoftware%2F&ref=openhardware.directory&product=raspberry-pi-500-plus&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fproducts%2Fraspberry-pi-500-plus%2F&ref=openhardware.directory&product=raspberry-pi-500-plus&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F6416%2FP6416%2BRP-009158-MM-Raspberry-Pi-500-product-brief.pdf&ref=openhardware.directory&product=raspberry-pi-500-plus&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fdocumentation%2Fcomputers%2Fkeyboard-computers.html&ref=openhardware.directory&product=raspberry-pi-500-plus&source=md-export)

## Tags

`raspberry-pi`, `keyboard-computer`, `sbc`, `desktop`, `cortex-a76`, `nvme`, `mechanical-keyboard`, `linux`, `gpio`, `bcm2712`

## Certifications

CE, FCC, RoHS

---
[View full device page](https://openhardware.directory/s/1370/raspberry-pi-500-plus)

---

# Adafruit ItsyBitsy M0 Express

> Compact 3.3V CircuitPython/Arduino board with ATSAMD21G18 Cortex M0+ at 48MHz, 32KB RAM, 256KB flash, 2MB SPI flash, 23 GPIO with 11 analog inputs, RGB DotStar LED, native USB. Measures 36mm × 18mm.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$11.95
- **CPU:** ATSAMD21G18 ARM Cortex M0+
- **RAM:** 32 KB
- **Flash:** 256 KB
- **GPIO:** 23 pins
- **Power:** 5V via Micro USB or LiPo battery via JST connector
- **Dimensions:** 36mm × 17.8mm × 4.3mm

## Compatible Firmware

- circuitpython
- arduino

## Components

- **ATSAMD21G18** (mcu): 32-bit ARM Cortex M0+ at 48 MHz with 256 KB flash, 32 KB SRAM, native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FSAM-D21DA1-Family-Data-Sheet-DS40001882G.pdf&ref=openhardware.directory&product=adafruit-itsybitsy-m0-express&source=md-export)
- **W25Q16FW** (flash): 2 MB SPI NOR flash for CircuitPython code storage, accessible as USB drive. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.winbond.com%2Fresource-files%2Fw25q16fw%2520revj%252005182017%2520spi.pdf&ref=openhardware.directory&product=adafruit-itsybitsy-m0-express&source=md-export)
- **APA102 DotStar** (led): Built-in RGB DotStar LED for status indication and light effects. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F2343%2FSK9822_FINAL.pdf&ref=openhardware.directory&product=adafruit-itsybitsy-m0-express&source=md-export)

## Protocols

- **I2C**: SDA=D16, SCL=D17
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, SS=D10
- **UART**: TX=D0, RX=D1
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | TX | — | digital-input, digital-output |
| D1 | RX | — | digital-input, digital-output |
| D2 | GPIO | — | digital-input, digital-output |
| D3 | GPIO | — | digital-input, digital-output, pwm |
| D4 | GPIO | — | digital-input, digital-output |
| D5 | GPIO | — | digital-input, digital-output, pwm |
| D7 | GPIO | — | digital-input, digital-output |
| D9 | GPIO | — | digital-input, digital-output, pwm |
| D10 | SS | — | digital-input, digital-output, pwm |
| D11 | MOSI | — | digital-input, digital-output, pwm |
| D12 | MISO | — | digital-input, digital-output |
| D13 | SCK | — | digital-input, digital-output |
| D16 | SDA | — | digital-input, digital-output |
| D17 | SCL | — | digital-input, digital-output |
| A0 | ADC/DAC | — | digital-input, digital-output, analog-input, dac |
| A1 | ADC | — | digital-input, digital-output, analog-input |
| A2 | ADC | — | digital-input, digital-output, analog-input |
| A3 | ADC | — | digital-input, digital-output, analog-input |
| A4 | ADC | — | digital-input, digital-output, analog-input |
| A5 | ADC | — | digital-input, digital-output, analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3727&ref=openhardware.directory&product=adafruit-itsybitsy-m0-express&source=md-export) — 11.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3727&ref=openhardware.directory&product=adafruit-itsybitsy-m0-express&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3727&ref=openhardware.directory&product=adafruit-itsybitsy-m0-express&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fintroducing-itsy-bitsy-m0&ref=openhardware.directory&product=adafruit-itsybitsy-m0-express&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-ItsyBitsy-M0-Express-PCB&ref=openhardware.directory&product=adafruit-itsybitsy-m0-express&source=md-export)

## Tags

`circuitpython`, `arduino`, `atsamd21`, `cortex-m0`, `adafruit`, `itsybitsy`, `express`, `compact`, `usb-hid`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-itsybitsy-m0-express)

---

# Raspberry Pi Zero v1.3

> Ultra-compact $10 single-board Linux computer with BCM2835 ARM at 1 GHz, 512MB RAM, micro SD, mini HDMI, two micro USB ports, and camera connector — the original Raspberry Pi Zero with camera support added in v1.3.

## Quick Facts

- **Brand:** Raspberry Pi
- **Board Type:** dev-board
- **Price:** ~$10
- **CPU:** BCM2835 ARM11 @ 1 GHz
- **RAM:** 512 MB
- **Flash:** none (microSD)
- **Power:** 5V via Micro USB
- **Dimensions:** 65 × 31 × 5 mm

## Compatible Firmware

- Raspberry Pi OS

## Components

- **BCM2835** (soc): Broadcom BCM2835 single-core ARM11 at 1 GHz with VideoCore IV GPU, 512MB RAM, running full Linux from microSD — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fadafruit.com%2Fimages%2Fproduct-files%2F2885%2FBCM2835Datasheet.pdf&ref=openhardware.directory&product=raspberry-pi-zero-v1-3&source=md-export)

## Protocols

- **UART**: TX=GPIO14, RX=GPIO15
- **SPI**: MOSI=GPIO10, MISO=GPIO9, SCK=GPIO11, CE0=GPIO8, CE1=GPIO7
- **I2C**: SDA=GPIO2, SCL=GPIO3
- **USB OTG**
- **HDMI**
- **CSI Camera**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | SDA1 | — | digital-input, digital-output |
| GPIO3 | SCL1 | — | digital-input, digital-output |
| GPIO4 | GPIO4 / GPCLK0 | — | digital-input, digital-output |
| GPIO5 | GPIO5 / GPCLK1 | — | digital-input, digital-output |
| GPIO6 | GPIO6 / GPCLK2 | — | digital-input, digital-output |
| GPIO7 | CE1 (SPI0) | — | digital-input, digital-output |
| GPIO8 | CE0 (SPI0) | — | digital-input, digital-output |
| GPIO9 | MISO (SPI0) | — | digital-input, digital-output |
| GPIO10 | MOSI (SPI0) | — | digital-input, digital-output |
| GPIO11 | SCLK (SPI0) | — | digital-input, digital-output |
| GPIO12 | GPIO12 / PWM0 | — | digital-input, digital-output, pwm |
| GPIO13 | GPIO13 / PWM1 | — | digital-input, digital-output, pwm |
| GPIO14 | TXD0 | — | digital-input, digital-output |
| GPIO15 | RXD0 | — | digital-input, digital-output |
| GPIO16 | GPIO16 | — | digital-input, digital-output |
| GPIO17 | GPIO17 | — | digital-input, digital-output |
| GPIO18 | GPIO18 / PCM_CLK / PWM0 | — | digital-input, digital-output, pwm |
| GPIO19 | GPIO19 / PCM_FS / PWM1 | — | digital-input, digital-output, pwm |
| GPIO20 | GPIO20 / PCM_DIN | — | digital-input, digital-output |
| GPIO21 | GPIO21 / PCM_DOUT | — | digital-input, digital-output |
| GPIO22 | GPIO22 | — | digital-input, digital-output |
| GPIO23 | GPIO23 | — | digital-input, digital-output |
| GPIO24 | GPIO24 | — | digital-input, digital-output |
| GPIO25 | GPIO25 | — | digital-input, digital-output |
| GPIO26 | GPIO26 | — | digital-input, digital-output |
| GPIO27 | GPIO27 | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2885&ref=openhardware.directory&product=raspberry-pi-zero-v1-3&source=md-export) — 10.00

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2885&ref=openhardware.directory&product=raspberry-pi-zero-v1-3&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fadafruit.com%2Fimages%2Fproduct-files%2F2885%2FBCM2835Datasheet.pdf&ref=openhardware.directory&product=raspberry-pi-zero-v1-3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fintroducing-the-raspberry-pi-zero&ref=openhardware.directory&product=raspberry-pi-zero-v1-3&source=md-export)

## Tags

`raspberry-pi`, `linux`, `sbc`, `arm`, `bcm2835`, `single-board-computer`, `iot`, `embedded-linux`

---
[View full device page](https://openhardware.directory/s/1370/raspberry-pi-zero-v1-3)

---

# Raspberry Pi Zero W

> Ultra-compact single-board computer with BCM2835 ARM11 at 1 GHz, 512MB RAM, built-in 802.11b/g/n WiFi (BCM43143), Bluetooth 4.1 LE, mini HDMI, microSD, camera connector, and 40-pin GPIO header in a 65mm × 30mm footprint.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** sbc
- **Price:** ~$15
- **CPU:** Broadcom BCM2835 ARM11 @ 1 GHz
- **RAM:** 512MB
- **Flash:** none
- **Power:** 5V via Micro-USB
- **Dimensions:** 65 × 30.5 × 5 mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 4.1

## Compatible Firmware

- linux
- raspberry-pi-os
- circuitpython

## Components

- **BCM2835** (mcu): Broadcom BCM2835 ARM11 processor at 1GHz with VideoCore IV GPU, 512MB LPDDR2 RAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fbcm2835%2Fbcm2835-peripherals.pdf&ref=openhardware.directory&product=raspberry-pi-zero-w&source=md-export)
- **BCM43143** (wifi-module): Broadcom BCM43143 802.11b/g/n WiFi and Bluetooth 4.1 LE combined module. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fpizero%2Fraspberry-pi-zero-w-reduced-schematics.pdf&ref=openhardware.directory&product=raspberry-pi-zero-w&source=md-export)

## Protocols

- **SPI**: MOSI=GPIO10, MISO=GPIO9, SCK=GPIO11, CE0=GPIO8, CE1=GPIO7
- **I2C**: SDA=GPIO2, SCL=GPIO3
- **UART**: TX=GPIO14, RX=GPIO15
- **802.11 b/g/n**
- **Bluetooth 4.1**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO14 | TXD — UART Transmit (physical pin 8) | — | digital-input, digital-output |
| GPIO15 | RXD — UART Receive (physical pin 10) | — | digital-input, digital-output |
| GPIO2 | SDA — I2C Data (physical pin 3) | — | digital-input, digital-output |
| GPIO3 | SCL — I2C Clock (physical pin 5) | — | digital-input, digital-output |
| GPIO10 | MOSI — SPI MOSI (physical pin 19) | — | digital-input, digital-output |
| GPIO9 | MISO — SPI MISO (physical pin 21) | — | digital-input, digital-output |
| GPIO11 | SCLK — SPI Clock (physical pin 23) | — | digital-input, digital-output |
| GPIO8 | CE0 — SPI Chip Enable 0 (physical pin 24) | — | digital-input, digital-output |
| GPIO7 | CE1 — SPI Chip Enable 1 (physical pin 26) | — | digital-input, digital-output |
| GPIO17 | GPIO17 — General Purpose I/O (physical pin 11) | — | digital-input, digital-output |
| GPIO18 | GPIO18 — General Purpose / PWM (physical pin 12) | — | digital-input, digital-output, pwm |
| GPIO22 | GPIO22 — General Purpose I/O (physical pin 15) | — | digital-input, digital-output |
| GPIO23 | GPIO23 — General Purpose I/O (physical pin 16) | — | digital-input, digital-output |
| GPIO24 | GPIO24 — General Purpose I/O (physical pin 18) | — | digital-input, digital-output |
| GPIO25 | GPIO25 — General Purpose I/O (physical pin 22) | — | digital-input, digital-output |
| GPIO27 | GPIO27 — General Purpose I/O (physical pin 13) | — | digital-input, digital-output |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3400&ref=openhardware.directory&product=raspberry-pi-zero-w&source=md-export) — 15.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3400&ref=openhardware.directory&product=raspberry-pi-zero-w&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fproducts%2Fraspberry-pi-zero-w%2F&ref=openhardware.directory&product=raspberry-pi-zero-w&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fbcm2835%2Fbcm2835-peripherals.pdf&ref=openhardware.directory&product=raspberry-pi-zero-w&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fpizero%2Fraspberry-pi-zero-w-reduced-schematics.pdf&ref=openhardware.directory&product=raspberry-pi-zero-w&source=md-export)

## Tags

`raspberry-pi`, `zero-w`, `linux-sbc`, `wifi`, `bluetooth`, `arm11`, `camera`, `gpio`

---
[View full device page](https://openhardware.directory/s/1370/raspberry-pi-zero-w)

---

# Arduino Mega ADK

> The Arduino Mega R3 ADK is an ATmega2560-based development board with 54 digital I/O, 16 analog inputs, 4 hardware UARTs, and a USB Type-A host port (Android ADK) with a power boost converter — designed for interfacing with Android smartphones as a USB host for accessory development.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$84.95
- **CPU:** ATmega2560 @ 16MHz
- **RAM:** 8 KB SRAM
- **Flash:** 256 KB
- **Power:** 7–12V DC via barrel jack or USB
- **Dimensions:** 101.98mm × 53.63mm × 15.29mm

## Compatible Firmware

- arduino
- platformio

## Components

- **ATmega2560** (mcu): Microchip ATmega2560 8-bit AVR RISC at 16MHz, 256KB flash, 8KB SRAM, 4KB EEPROM, 54 I/O pins — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FATmega640-1280-1281-2560-2561-Datasheet-DS40002211A.pdf&ref=openhardware.directory&product=arduino-mega-adk&source=md-export)
- **MAX3421E** (usb-controller): Maxim MAX3421E USB host/peripheral controller enabling Android ADK (USB OTG host) functionality — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.maximintegrated.com%2Fen%2Fds%2FMAX3421E.pdf&ref=openhardware.directory&product=arduino-mega-adk&source=md-export)

## Protocols

- **I2C**: SDA=D20, SCL=D21
- **SPI**: MOSI=D51, MISO=D50, SCK=D52, SS=D53
- **UART**: TX=D1, RX=D0
- **PWM**
- **USB**
- **JTAG**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | D0 | — | GPIO, UART0 RX |
| D1 | D1 | — | GPIO, UART0 TX |
| D2 | D2 | — | GPIO, PWM, INT4 |
| D3 | D3 | — | GPIO, PWM, INT5 |
| D4 | D4 | — | GPIO, PWM |
| D5 | D5 | — | GPIO, PWM |
| D6 | D6 | — | GPIO, PWM |
| D7 | D7 | — | GPIO, PWM |
| D8 | D8 | — | GPIO, PWM |
| D9 | D9 | — | GPIO, PWM |
| D10 | D10 | — | GPIO, PWM |
| D11 | D11 | — | GPIO, PWM |
| D12 | D12 | — | GPIO, PWM |
| D13 | D13 | — | GPIO, PWM, LED |
| D14 | D14 | — | GPIO, UART3 TX |
| D15 | D15 | — | GPIO, UART3 RX |
| D16 | D16 | — | GPIO, UART2 TX |
| D17 | D17 | — | GPIO, UART2 RX |
| D18 | D18 | — | GPIO, UART1 TX |
| D19 | D19 | — | GPIO, UART1 RX |
| D20 | D20 | — | GPIO, I2C SDA |
| D21 | D21 | — | GPIO, I2C SCL |
| D50 | D50 | — | GPIO, SPI MISO |
| D51 | D51 | — | GPIO, SPI MOSI |
| D52 | D52 | — | GPIO, SPI CLK |
| D53 | D53 | — | GPIO, SPI SS |
| A0 | A0 | — | GPIO, ADC |
| A1 | A1 | — | GPIO, ADC |
| A2 | A2 | — | GPIO, ADC |
| A3 | A3 | — | GPIO, ADC |
| A4 | A4 | — | GPIO, ADC |
| A5 | A5 | — | GPIO, ADC |
| A6 | A6 | — | GPIO, ADC |
| A7 | A7 | — | GPIO, ADC |
| A8 | A8 | — | GPIO, ADC |
| A9 | A9 | — | GPIO, ADC |
| A10 | A10 | — | GPIO, ADC |
| A11 | A11 | — | GPIO, ADC |
| A12 | A12 | — | GPIO, ADC |
| A13 | A13 | — | GPIO, ADC |
| A14 | A14 | — | GPIO, ADC |
| A15 | A15 | — | GPIO, ADC |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F563&ref=openhardware.directory&product=arduino-mega-adk&source=md-export) — $84.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F563&ref=openhardware.directory&product=arduino-mega-adk&source=md-export)
- [docs](https://openhardware.directory/r?to=https%3A%2F%2Fwww.arduino.cc%2Fen%2FMain%2FArduinoBoardMegaADK&ref=openhardware.directory&product=arduino-mega-adk&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Farduino%2FArduino&ref=openhardware.directory&product=arduino-mega-adk&source=md-export)

## Tags

`arduino`, `mega`, `adk`, `android`, `atmega2560`, `usb-host`, `avr`, `arduino-compatible`

---
[View full device page](https://openhardware.directory/s/1370/arduino-mega-adk)

---

# ESP32-C6 DevKitC-1-N8

> Official Espressif development board featuring the ESP32-C6 — a RISC-V single-core MCU with WiFi 6, BLE 5.0, Zigbee 3.0, Thread 1.3, and native Matter support. 8MB flash, USB-C JTAG/serial.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$9.95
- **CPU:** RISC-V single-core LP @ 160MHz + ULP @ 20MHz (ESP32-C6)
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **USB:** USB-C 2.0 (JTAG/serial)
- **Power:** 5V

## Connectivity

WiFi 802.11ax WiFi 6 | Bluetooth BLE 5.0 | Zigbee Zigbee 3.0

## Compatible Firmware

- esp-idf
- arduino
- micropython
- zephyr
- matter

## Components

- **ESP32-C6** (mcu): ESP32-C6 SoC with RISC-V 32-bit core, WiFi 6, BLE 5.0, Zigbee 3.0, Thread 1.3, and Matter support — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=esp32-c6-devkitc-1&source=md-export)

## Protocols

- **I2C**: SDA=GPIO6, SCL=GPIO7
- **SPI**: MOSI=GPIO7, MISO=GPIO2, SCK=GPIO6, CS=GPIO10
- **UART**: TX=GPIO16, RX=GPIO17
- **PWM**
- **ADC**: ADC0=GPIO0, ADC1=GPIO1, ADC2=GPIO2, ADC3=GPIO3, ADC4=GPIO4, ADC5=GPIO5, ADC6=GPIO6

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | ADC0 | — | adc, digital-input, digital-output, pwm |
| GPIO1 | ADC1 | — | adc, digital-input, digital-output, pwm |
| GPIO2 | ADC2 / SPI MISO | — | adc, digital-input, digital-output, pwm |
| GPIO3 | ADC3 | — | adc, digital-input, digital-output, pwm |
| GPIO4 | ADC4 | — | adc, digital-input, digital-output, pwm |
| GPIO5 | ADC5 | — | adc, digital-input, digital-output, pwm |
| GPIO6 | ADC6 / I2C SDA / SPI SCK | — | adc, digital-input, digital-output, pwm |
| GPIO7 | I2C SCL / SPI MOSI | — | digital-input, digital-output, pwm |
| GPIO8 | GPIO8 | — | digital-input, digital-output, pwm |
| GPIO9 | GPIO9 | — | digital-input, digital-output, pwm |
| GPIO10 | SPI CS | — | digital-input, digital-output, pwm |
| GPIO11 | GPIO11 | — | digital-input, digital-output, pwm |
| GPIO12 | GPIO12 | — | digital-input, digital-output, pwm |
| GPIO13 | GPIO13 | — | digital-input, digital-output, pwm |
| GPIO14 | GPIO14 | — | digital-input, digital-output, pwm |
| GPIO15 | GPIO15 | — | digital-input, digital-output, pwm |
| GPIO16 | UART TX | — | digital-input, digital-output, pwm |
| GPIO17 | UART RX | — | digital-input, digital-output, pwm |
| GPIO18 | GPIO18 | — | digital-input, digital-output, pwm |
| GPIO19 | GPIO19 | — | digital-input, digital-output, pwm |
| GPIO20 | GPIO20 | — | digital-input, digital-output, pwm |
| GPIO21 | GPIO21 | — | digital-input, digital-output, pwm |
| GPIO22 | GPIO22 | — | digital-input, digital-output, pwm |
| GPIO23 | GPIO23 | — | digital-input, digital-output, pwm |

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5672&ref=openhardware.directory&product=esp32-c6-devkitc-1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-dev-kits&ref=openhardware.directory&product=esp32-c6-devkitc-1&source=md-export)

## Tags

`esp32-c6`, `risc-v`, `wifi6`, `zigbee`, `thread`, `matter`, `ble`, `espressif`, `devkit`

---
[View full device page](https://openhardware.directory/s/1370/esp32-c6-devkitc-1)

---

# ESP32-H2 DevKitM-1-N4S

> Official Espressif development board for the ESP32-H2 — a RISC-V MCU purpose-built for 802.15.4 wireless protocols: BLE 5.3, Zigbee 3.0, Thread 1.3, and Matter. No WiFi. 4MB flash, USB-C with CH343P.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$10
- **CPU:** RISC-V single-core @ 96MHz (ESP32-H2)
- **RAM:** 320KB SRAM
- **Flash:** 4MB
- **USB:** USB-C 2.0 (JTAG/serial via CH343P)
- **Power:** 5V

## Connectivity

Bluetooth BLE 5.3 | Zigbee Zigbee 3.0

## Compatible Firmware

- esp-idf
- arduino
- zephyr
- matter

## Components

- **ESP32-H2** (mcu): ESP32-H2 SoC with RISC-V 32-bit core at 96MHz, BLE 5.3, Zigbee 3.0, Thread 1.3, and Matter 1.0 — no WiFi radio — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-h2_datasheet_en.pdf&ref=openhardware.directory&product=esp32-h2-devkitm-1&source=md-export)

## Protocols

- **I2C**: SDA=GPIO12, SCL=GPIO22
- **SPI**: MOSI=GPIO5, MISO=GPIO0, SCK=GPIO4, CS=GPIO1
- **UART**: TX=GPIO24, RX=GPIO23
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | SPI MISO | — | adc, digital-input, digital-output, pwm |
| GPIO1 | SPI CS | — | adc, digital-input, digital-output, pwm |
| GPIO2 | GPIO2 | — | adc, digital-input, digital-output, pwm |
| GPIO3 | GPIO3 | — | adc, digital-input, digital-output, pwm |
| GPIO4 | SPI SCK | — | adc, digital-input, digital-output, pwm |
| GPIO5 | SPI MOSI | — | adc, digital-input, digital-output, pwm |
| GPIO6 | GPIO6 | — | digital-input, digital-output, pwm |
| GPIO7 | GPIO7 | — | digital-input, digital-output, pwm |
| GPIO8 | GPIO8 | — | digital-input, digital-output, pwm |
| GPIO9 | GPIO9 | — | digital-input, digital-output, pwm |
| GPIO10 | GPIO10 | — | digital-input, digital-output, pwm |
| GPIO11 | GPIO11 | — | digital-input, digital-output, pwm |
| GPIO12 | I2C SDA | — | digital-input, digital-output, pwm |
| GPIO13 | GPIO13 | — | digital-input, digital-output, pwm |
| GPIO14 | GPIO14 | — | digital-input, digital-output, pwm |
| GPIO15 | GPIO15 | — | digital-input, digital-output, pwm |
| GPIO16 | GPIO16 | — | digital-input, digital-output, pwm |
| GPIO17 | GPIO17 | — | digital-input, digital-output, pwm |
| GPIO22 | I2C SCL | — | digital-input, digital-output, pwm |
| GPIO23 | UART RX | — | digital-input, digital-output, pwm |
| GPIO24 | UART TX | — | digital-input, digital-output, pwm |
| GPIO25 | GPIO25 | — | digital-input, digital-output, pwm |
| GPIO26 | GPIO26 | — | digital-input, digital-output, pwm |
| GPIO27 | GPIO27 | — | digital-input, digital-output, pwm |

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5715&ref=openhardware.directory&product=esp32-h2-devkitm-1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-dev-kits&ref=openhardware.directory&product=esp32-h2-devkitm-1&source=md-export)

## Tags

`esp32-h2`, `risc-v`, `zigbee`, `thread`, `matter`, `ble`, `802154`, `espressif`, `devkit`

---
[View full device page](https://openhardware.directory/s/1370/esp32-h2-devkitm-1)

---

# Heltec HT-CT62

> Ultra-compact ESP32-C3 + SX1262 LoRa/LoRaWAN module with WiFi and BLE, designed for SMT integration into IoT devices. Features 10uA deep sleep, +21dBm TX power, and Meshtastic compatibility in a tiny 17.78mm stamp-hole package.

## Quick Facts

- **Brand:** Heltec Automation
- **Board Type:** module
- **Price:** ~$6.9
- **CPU:** RISC-V RV32IMC single-core @ 160MHz, HW crypto (AES-128,256, SHA, RSA, HMAC, ECDSA)
- **RAM:** 400KB SRAM
- **Flash:** 4MB SiP
- **USB:** None (requires external USB-to-UART bridge)
- **Power:** 3.3V
- **Dimensions:** 17.78 × 17.78 × 2.8mm

## Connectivity

WiFi 802.11 b/g/n 2.4GHz | Bluetooth BLE 5.0

## Components

- **ESP32-C3FN4** (mcu): Espressif ESP32-C3FN4 single-core RISC-V RV32IMC microcontroller at 160MHz with 400KB SRAM, 4MB SiP flash, WiFi 802.11 b/g/n, BLE 5.0, and hardware cryptographic acceleration (AES/SHA/RSA/HMAC/ECDSA). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-ht-ct62&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver supporting 150–960MHz frequency range with +22dBm maximum output power, -134dBm sensitivity, and TCXO for stable frequency reference. Supports LoRa and FSK modulation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F6%2Fb%2F5%2F1%2F4%2FSX1262_datasheet.pdf&ref=openhardware.directory&product=heltec-ht-ct62&source=md-export)

## Protocols

- **SPI** (SPI (LoRa)): SCK=GPIO10, MOSI=GPIO7, MISO=GPIO6, CS=GPIO8
- **UART** (UART0): TX=GPIO21, RX=GPIO20
- **I2C**: SDA=GPIO1, SCL=GPIO0
- **ADC**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | I2C SCL / ADC1_CH0 | — | digital-input, digital-output, adc, pwm, i2c |
| GPIO1 | I2C SDA / ADC1_CH1 | — | digital-input, digital-output, adc, pwm, i2c |
| GPIO2 | LED / ADC1_CH2 | — | digital-input, digital-output, adc, pwm |
| GPIO3 | LoRa DIO1 / ADC1_CH3 | — | digital-input, digital-output, adc, pwm |
| GPIO4 | LoRa BUSY / ADC1_CH4 | — | digital-input, digital-output, adc, pwm |
| GPIO5 | LoRa RESET / ADC2_CH0 | — | digital-input, digital-output, adc, pwm |
| GPIO6 | SPI MISO (LoRa) | — | digital-input, digital-output, pwm |
| GPIO7 | SPI MOSI (LoRa) | — | digital-input, digital-output, pwm |
| GPIO8 | SPI CS (LoRa) | — | digital-input, digital-output, pwm |
| GPIO9 | Boot Button | — | digital-input, digital-output, pwm, strapping |
| GPIO10 | SPI SCK (LoRa) | — | digital-input, digital-output, pwm |
| GPIO18 | USB D- | — | digital-input, digital-output |
| GPIO19 | USB D+ | — | digital-input, digital-output |
| GPIO20 | UART0 RX | — | digital-input, digital-output, pwm |
| GPIO21 | UART0 TX | — | digital-input, digital-output, pwm |

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-ct62%2F&ref=openhardware.directory&product=heltec-ht-ct62&source=md-export) — 6.90
- [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2F1005005442830223.html&ref=openhardware.directory&product=heltec-ht-ct62&source=md-export) — 6.60
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FEC-Buying-HT-CT62-Wireless-ESP32C3%2Fdp%2FB0CB3X6JWS&ref=openhardware.directory&product=heltec-ht-ct62&source=md-export) — $6.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-ct62%2F&ref=openhardware.directory&product=heltec-ht-ct62&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltecDocs&ref=openhardware.directory&product=heltec-ht-ct62&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.org%2Fen%2Fnode%2Fesp32%2Fht_ct62%2Findex.html&ref=openhardware.directory&product=heltec-ht-ct62&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-CT62%2FHT-CT62%28Rev1.1%29.pdf&ref=openhardware.directory&product=heltec-ht-ct62&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-CT62%2FHT-CT62_Schematic_Diagram.pdf&ref=openhardware.directory&product=heltec-ht-ct62&source=md-export)

## Tags

`esp32-c3`, `lora`, `lorawan`, `meshtastic`, `sx1262`, `iot`, `wifi`, `ble`, `risc-v`, `heltec`

---
[View full device page](https://openhardware.directory/s/1370/heltec-ht-ct62)

---

# Heltec HRI-4853

> ESP32-based RS-485 to Ethernet/LTE converter (DTU) with built-in web configuration, Modbus support, DIN-rail mounting, and ESPHome compatibility for industrial IoT and Home Assistant integration.

## Quick Facts

- **Brand:** Heltec Automation
- **Board Type:** DTU
- **Price:** ~$22.9
- **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, hardware crypto (AES/SHA)
- **RAM:** 520KB SRAM
- **Flash:** 4MB (QSPI)
- **USB:** None (UART-based programming)
- **Power:** 4.5-28V DC wide input
- **Dimensions:** 120 × 70 × 32mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 4.2, BLE | Ethernet 10/100 Mbps (RTL8201 PHY)

## Components

- **ESP32-D0WDQ6** (mcu): Espressif ESP32-D0WDQ6 dual-core Xtensa LX6 @ 240MHz with 520KB SRAM, WiFi 802.11 b/g/n, Bluetooth 4.2, and hardware AES/SHA crypto acceleration. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=heltec-hri-4853&source=md-export)
- **RTL8201** (ethernet-phy): Realtek RTL8201 single-chip 10/100 Mbps Ethernet PHY transceiver with RMII interface for wired network connectivity. — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Frealtek.info%2Fpdf%2Frtl8201.pdf&ref=openhardware.directory&product=heltec-hri-4853&source=md-export)
- **MAX3485** (rs-485-transceiver): Maxim MAX3485 3.3V low-power half-duplex RS-485/RS-422 transceiver with 10 Mbps data rate, fail-safe receiver, and thermal shutdown protection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fen%2Fproducts%2Fmax3485.html&ref=openhardware.directory&product=heltec-hri-4853&source=md-export)

## Protocols

- **Ethernet RMII**: MDC=GPIO23, MDIO=GPIO18, CLK=GPIO17
- **UART (Modbus RS-485)**: TX=GPIO33, RX=GPIO37
- **RS-485**: Power Control=GPIO16

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | HA Online LED | — | digital-input, digital-output, pwm, adc, touch |
| GPIO3 | Status LED | — | digital-input, digital-output, pwm |
| GPIO16 | MAX3485 Power Control | — | digital-input, digital-output, pwm |
| GPIO17 | Ethernet RMII CLK | — | digital-input, digital-output, pwm |
| GPIO18 | Ethernet MDIO | — | digital-input, digital-output, pwm |
| GPIO23 | Ethernet MDC | — | digital-input, digital-output, pwm |
| GPIO33 | Modbus UART TX | — | digital-input, digital-output, pwm, adc |
| GPIO37 | Modbus UART RX | — | input-only |

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Frs4853-tcp-udp-mqtt-converter%2F&ref=openhardware.directory&product=heltec-hri-4853&source=md-export) — 22.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Frs4853-tcp-udp-mqtt-converter%2F&ref=openhardware.directory&product=heltec-hri-4853&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.org%2Fen%2Fready_to_use%2Fhri-485x%2Findex.html&ref=openhardware.directory&product=heltec-hri-4853&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHRI-485X%2FHRI-485x.pdf&ref=openhardware.directory&product=heltec-hri-4853&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation&ref=openhardware.directory&product=heltec-hri-4853&source=md-export)

## Tags

`rs485`, `modbus`, `ethernet`, `dtu`, `industrial`, `esp32`, `esphome`, `home-assistant`, `din-rail`, `mqtt`

---
[View full device page](https://openhardware.directory/s/1370/heltec-hri-4853)

---

# NanoPi R2S

> Budget dual-GbE router board with RK3328 quad-core Cortex-A53 at 1.3GHz, 1GB DDR4, native + USB 3.0 Gigabit Ethernet, and USB-C power — the most affordable open-source OpenWrt router platform at just $27.

## Quick Facts

- **Brand:** FriendlyElec
- **Board Type:** sbc
- **Price:** ~$27
- **CPU:** ARM Cortex-A53 4x1.3GHz, RK3328
- **RAM:** 1GB DDR4
- **Flash:** none (microSD boot)
- **USB:** USB 2.0 Type-A,USB-C (power)
- **Power:** 5V/2A via USB-C
- **Dimensions:** 55.6 × 52mm

## Connectivity

Ethernet 2x Gigabit

## Compatible Firmware

- arduino

## Components

- **RK3328** (mcu): Rockchip RK3328 quad-core Cortex-A53 at 1.3GHz with Mali-450 GPU and USB 3.0 for second Ethernet. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fopensource.rock-chips.com%2Fimages%2Fd%2Fd7%2FRockchip_RK3328_Datasheet_V1.2-20170321.pdf&ref=openhardware.directory&product=nanopi-r2s&source=md-export)

## Protocols

- **UART**: notes=Debug UART 3-pin header

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | Debug TX | — | digital-output |
| GPIO2 | Debug RX | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D282&ref=openhardware.directory&product=nanopi-r2s&source=md-export) — $27.00
- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB0B6SDMS2W&ref=openhardware.directory&product=nanopi-r2s&source=md-export) — $35.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D282&ref=openhardware.directory&product=nanopi-r2s&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_R2S&ref=openhardware.directory&product=nanopi-r2s&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ffriendlyarm%2Fsd-fuse_rk3328&ref=openhardware.directory&product=nanopi-r2s&source=md-export)

## Tags

`friendlyelec`, `nanopi`, `rk3328`, `router`, `openwrt`, `budget`, `dual-gbe`

---
[View full device page](https://openhardware.directory/s/1370/nanopi-r2s)

---

# NanoPi Zero2

> Ultra-compact 45\u00d745mm Linux SBC with RK3528A quad-core Cortex-A53 at 1.8GHz, up to 2GB RAM, Gigabit Ethernet, M.2 WiFi slot, USB 2.0, 30-pin GPIO, and 4K HDMI — starting at just $18.

## Quick Facts

- **Brand:** FriendlyElec
- **Board Type:** sbc
- **Price:** ~$18
- **CPU:** ARM Cortex-A53 4x1.8GHz, RK3528A
- **RAM:** 1GB/2GB LPDDR4X
- **Flash:** 16MB SPI NOR,eMMC module
- **USB:** USB 2.0 Type-A,USB-C (power/device)
- **Power:** 5V/2A via USB-C or header
- **Dimensions:** 45 × 45mm

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- arduino

## Components

- **RK3528A** (mcu): Rockchip RK3528A quad-core Cortex-A53 at 1.8GHz with Mali-450 GPU, Gigabit Ethernet, and 4K video decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fuploads%2Fpdf%2F2023.03.17%2FRK3528A%2520Brief%2520Datasheet.pdf&ref=openhardware.directory&product=nanopi-zero2&source=md-export)

## Protocols

- **SPI**: notes=Via 30-pin FPC connector
- **I2C**: notes=Via 30-pin FPC connector
- **UART**: notes=4x UART via FPC + debug header
- **PWM**: notes=5x PWM via FPC connector

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | Digital I/O | — | digital-input, digital-output, pwm |
| GPIO2 | SPI/UART | — | digital-input, digital-output |
| GPIO3 | I2C/UART | — | digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D304&ref=openhardware.directory&product=nanopi-zero2&source=md-export) — $18.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D304&ref=openhardware.directory&product=nanopi-zero2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_Zero2&ref=openhardware.directory&product=nanopi-zero2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ffriendlyarm%2Fsd-fuse_rk3528&ref=openhardware.directory&product=nanopi-zero2&source=md-export)

## Tags

`friendlyelec`, `nanopi`, `rk3528a`, `compact`, `sbc`, `gbe`, `budget`

---
[View full device page](https://openhardware.directory/s/1370/nanopi-zero2)

---

# NanoPi R5S-LTS

> RK3568B2 router board with quad-core Cortex-A55 at 2.0GHz, up to 4GB RAM, 32GB eMMC, native GbE + dual 2.5GbE, M.2 PCIe, 2x USB 3.0, HDMI 4K, and USB-C PD — the mid-range OpenWrt router with long-term support.

## Quick Facts

- **Brand:** FriendlyElec
- **Board Type:** sbc
- **Price:** ~$87
- **CPU:** ARM Cortex-A55 4x2.0GHz, RK3568B2
- **RAM:** 2GB/4GB LPDDR4X
- **Flash:** 8GB/32GB eMMC 5.1
- **USB:** 2x USB 3.0 Type-A,USB-C PD
- **Power:** USB-C PD (5V/9V/12V)
- **Dimensions:** 62 × 90mm

## Connectivity

Ethernet 1x Gigabit, 2x 2.5 Gigabit

## Compatible Firmware

- arduino

## Components

- **RK3568B2** (mcu): Rockchip RK3568B2 quad-core Cortex-A55 at 2.0GHz with Mali-G52 GPU, 0.8 TOPS NPU, and PCIe 3.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fopensource.rock-chips.com%2Fimages%2F9%2F97%2FRockchip_RK3568_Datasheet_V1.3-20220309.pdf&ref=openhardware.directory&product=nanopi-r5s-lts&source=md-export)

## Protocols

- **UART**: notes=Debug UART 3-pin header

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | Debug TX | — | digital-output |
| GPIO2 | Debug RX | — | digital-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D287&ref=openhardware.directory&product=nanopi-r5s-lts&source=md-export) — $87.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D287&ref=openhardware.directory&product=nanopi-r5s-lts&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_R5S-LTS&ref=openhardware.directory&product=nanopi-r5s-lts&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ffriendlyarm%2Fsd-fuse_rk356x&ref=openhardware.directory&product=nanopi-r5s-lts&source=md-export)

## Tags

`friendlyelec`, `nanopi`, `rk3568`, `router`, `2.5gbe`, `openwrt`, `lts`

---
[View full device page](https://openhardware.directory/s/1370/nanopi-r5s-lts)

---

# BigTreeTech BTT Pi V1.2

> Single board computer by BigTreeTech with Allwinner H616 quad-core Cortex-A53, 1GB DDR3L RAM, WiFi, 100Mbps Ethernet, and 40-pin GPIO. Drop-in Raspberry Pi CM4 alternative for Klipper 3D printing.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Single Board Computer
- **CPU:** Allwinner H616 Quad-core Cortex-A53 @ 1.5GHz
- **RAM:** 1GB DDR3L
- **Flash:** None (microSD)
- **GPIO:** 40-pin pins
- **USB:** 3x USB 2.0,1x USB OTG
- **Power:** 5V/2A

## Connectivity

WiFi true | Ethernet true

## Compatible Firmware

- Klipper
- Armbian
- Debian

## Components

- **Allwinner H616** (cpu): Allwinner H616 quad-core ARM Cortex-A53 @ 1.5GHz with Mali-G31 GPU — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flinux-sunxi.org%2FH616&ref=openhardware.directory&product=bigtreetech-btt-pi-v1-2&source=md-export)
- **2.4G 802.11 b/g/n** (wifi): Integrated 2.4GHz 802.11 b/g/n WiFi module — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBTT-Pi&ref=openhardware.directory&product=bigtreetech-btt-pi-v1-2&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-btt-pi-v1-2&ref=openhardware.directory&product=bigtreetech-btt-pi-v1-2&source=md-export)

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBTT-Pi&ref=openhardware.directory&product=bigtreetech-btt-pi-v1-2&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-btt-pi-v1-2&ref=openhardware.directory&product=bigtreetech-btt-pi-v1-2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FCB1&ref=openhardware.directory&product=bigtreetech-btt-pi-v1-2&source=md-export)

## Tags

`single-board-computer`, `klipper`, `3d-printing`, `allwinner-h616`, `raspberry-pi-alternative`, `bigtreetech`, `arm-cortex-a53`, `gpio`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-btt-pi-v1-2)

---

# NanoPi R5C

> Compact dual 2.5GbE router with RK3568B2 quad-core Cortex-A55 at 2.0GHz, up to 4GB RAM, dual USB 3.2, HDMI, M.2, and 0.8 TOPS NPU in a tiny 58\u00d758mm form factor — the small-footprint 2.5G OpenWrt router.

## Quick Facts

- **Brand:** FriendlyElec
- **Board Type:** sbc
- **Price:** ~$61
- **CPU:** ARM Cortex-A55 4x2.0GHz, RK3568B2
- **RAM:** 1GB/2GB/4GB LPDDR4X
- **Flash:** 0/8GB/32GB eMMC
- **USB:** 2x USB 3.2 Gen1,USB-C (power)
- **Power:** USB-C (5V)
- **Dimensions:** 58 × 58mm

## Connectivity

Ethernet 2x 2.5 Gigabit

## Compatible Firmware

- arduino

## Components

- **RK3568B2** (mcu): Rockchip RK3568B2 quad-core Cortex-A55 at 2.0GHz with Mali-G52 GPU and 0.8 TOPS NPU. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fopensource.rock-chips.com%2Fimages%2F9%2F97%2FRockchip_RK3568_Datasheet_V1.3-20220309.pdf&ref=openhardware.directory&product=nanopi-r5c&source=md-export)

## Protocols

- **UART**: notes=Debug UART

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | Debug TX | — | digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D290&ref=openhardware.directory&product=nanopi-r5c&source=md-export) — $61.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D290&ref=openhardware.directory&product=nanopi-r5c&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_R5C&ref=openhardware.directory&product=nanopi-r5c&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ffriendlyarm%2Fsd-fuse_rk356x&ref=openhardware.directory&product=nanopi-r5c&source=md-export)

## Tags

`friendlyelec`, `nanopi`, `rk3568`, `router`, `2.5gbe`, `compact`

---
[View full device page](https://openhardware.directory/s/1370/nanopi-r5c)

---

# NanoPi R6C

> RK3588S router board with 4x Cortex-A76 + 4x Cortex-A53, up to 8GB RAM, 32GB eMMC, native GbE + 2.5GbE, M.2 NVMe, HDMI 8K, 6 TOPS NPU, and USB-C PD — the mid-range RK3588S router with NVMe storage support.

## Quick Facts

- **Brand:** FriendlyElec
- **Board Type:** sbc
- **Price:** ~$169
- **CPU:** ARM Cortex-A76 4x2.4GHz,Cortex-A53 4x1.8GHz, RK3588S
- **RAM:** 4GB/8GB LPDDR4X
- **Flash:** 32GB eMMC
- **USB:** USB 3.0,USB 2.0,USB-C PD
- **Power:** USB-C PD (5-20V)
- **Dimensions:** 62 × 90mm

## Connectivity

Ethernet 1x Gigabit, 1x 2.5 Gigabit

## Compatible Firmware

- arduino

## Components

- **RK3588S** (mcu): Rockchip RK3588S with 4x Cortex-A76 + 4x Cortex-A53, Mali-G610 MP4, 6 TOPS NPU. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fuploads%2Fpdf%2F2022.8.26%2F192%2FRK3588%2520Brief%2520Datasheet.pdf&ref=openhardware.directory&product=nanopi-r6c&source=md-export)

## Protocols

- **UART**: notes=Debug UART
- **PCIe**: notes=M.2 M-Key PCIe 2.1 x1 for NVMe

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | Debug TX | — | digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D291&ref=openhardware.directory&product=nanopi-r6c&source=md-export) — $169.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D291&ref=openhardware.directory&product=nanopi-r6c&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_R6C&ref=openhardware.directory&product=nanopi-r6c&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ffriendlyarm%2Fsd-fuse_rk3588&ref=openhardware.directory&product=nanopi-r6c&source=md-export)

## Tags

`friendlyelec`, `nanopi`, `rk3588s`, `router`, `2.5gbe`, `nvme`, `npu`

---
[View full device page](https://openhardware.directory/s/1370/nanopi-r6c)

---

# NanoPi R2S Plus

> Enhanced RK3328 dual-GbE router with quad-core Cortex-A53 at 1.4GHz, 1GB DDR4, 32GB eMMC onboard, dual Gigabit Ethernet, optional WiFi, and metal case — the R2S upgrade with built-in storage for reliable OpenWrt routing.

## Quick Facts

- **Brand:** FriendlyElec
- **Board Type:** sbc
- **Price:** ~$30
- **CPU:** ARM Cortex-A53 4x1.4GHz, RK3328
- **RAM:** 1GB DDR4
- **Flash:** 32GB eMMC 5.1
- **USB:** 2x USB 2.0,USB-C (power)
- **Power:** 5V/2A via USB-C
- **Dimensions:** 62.5 × 63.5mm (with case)

## Connectivity

Ethernet 2x Gigabit

## Compatible Firmware

- arduino

## Components

- **RK3328** (mcu): Rockchip RK3328 quad-core Cortex-A53 at 1.4GHz with Mali-450 GPU. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fopensource.rock-chips.com%2Fimages%2Fd%2Fd7%2FRockchip_RK3328_Datasheet_V1.2-20170321.pdf&ref=openhardware.directory&product=nanopi-r2s-plus&source=md-export)

## Protocols

- **UART**: notes=Debug UART via USB-C

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | Debug TX | — | digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D296&ref=openhardware.directory&product=nanopi-r2s-plus&source=md-export) — $30.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D296&ref=openhardware.directory&product=nanopi-r2s-plus&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_R2S-Plus&ref=openhardware.directory&product=nanopi-r2s-plus&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ffriendlyarm%2Fsd-fuse_rk3328&ref=openhardware.directory&product=nanopi-r2s-plus&source=md-export)

## Tags

`friendlyelec`, `nanopi`, `rk3328`, `router`, `openwrt`, `emmc`, `dual-gbe`

---
[View full device page](https://openhardware.directory/s/1370/nanopi-r2s-plus)

---

# BigTreeTech EBB SB2209 CAN Toolhead Board (RP2040)

> Toolhead board designed for the Voron StealthBurner. Powered by RP2040, supports CAN and USB, includes TMC2209, ADXL345 accelerometer, and PT100/PT1000 for Klipper 3D printers.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Toolhead Board
- **Price:** ~$25.68
- **CPU:** RP2040
- **RAM:** 264KB
- **Flash:** 2MB
- **USB:** USB Type-C
- **Power:** DC 12V-24V 9A

## Compatible Firmware

- Klipper

## Components

- **TMC2209** (stepper-driver): Onboard TMC2209 in UART mode for extruder control — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FTMC2209_datasheet_rev1.09.pdf&ref=openhardware.directory&product=bigtreetech-ebb-sb2209-can-toolhead-board-rp2040&source=md-export)
- **ADXL345** (accelerometer): Onboard ADXL345 for Klipper input shaping resonance compensation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FADXL345.pdf&ref=openhardware.directory&product=bigtreetech-ebb-sb2209-can-toolhead-board-rp2040&source=md-export)
- **MAX31865** (temperature-ic): Onboard MAX31865 for PT100/PT1000 RTD sensor support — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX31865.pdf&ref=openhardware.directory&product=bigtreetech-ebb-sb2209-can-toolhead-board-rp2040&source=md-export)
- **100K NTC** (thermistor): NTC 100K or PT1000 thermistor input — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.vishay.com%2Fdocs%2F29049%2Fntcle100.pdf&ref=openhardware.directory&product=bigtreetech-ebb-sb2209-can-toolhead-board-rp2040&source=md-export)
- **Triple Fan Output** (fan-output): FAN1, FAN2 CNC fan ports plus 4W_FAN 4-wire PWM fan port — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FEBB%2Ftree%2Fmaster%2FEBB%2520SB2209%2520CAN%2520%28RP2040%29&ref=openhardware.directory&product=bigtreetech-ebb-sb2209-can-toolhead-board-rp2040&source=md-export)
- **Hotend Heater Output** (heater-output): Hotend heater output port — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FEBB%2Ftree%2Fmaster%2FEBB%2520SB2209%2520CAN%2520%28RP2040%29&ref=openhardware.directory&product=bigtreetech-ebb-sb2209-can-toolhead-board-rp2040&source=md-export)

## Protocols

- **CAN Bus**
- **USB**
- **UART**
- **SPI**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-ebb-sb2209-can-v1-0&ref=openhardware.directory&product=bigtreetech-ebb-sb2209-can-toolhead-board-rp2040&source=md-export) — $25.68

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FEBB&ref=openhardware.directory&product=bigtreetech-ebb-sb2209-can-toolhead-board-rp2040&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-ebb-sb2209-can-v1-0&ref=openhardware.directory&product=bigtreetech-ebb-sb2209-can-toolhead-board-rp2040&source=md-export)

## Tags

`can-bus`, `toolhead-board`, `klipper`, `3d-printing`, `rp2040`, `tmc2209`, `adxl345`, `bigtreetech`, `voron`, `stealthburner`, `ebb-sb2209`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-ebb-sb2209-can-toolhead-board-rp2040)

---

# Pine64 Ox64

> Pico-sized RISC-V SBC powered by the Bouffalo Lab BL808 triple-core SoC with WiFi, BLE 5.0, and Zigbee. Features 64MB PSRAM, up to 16MB flash, microSD slot, USB-C with MIPI-CSI camera support, and 26 GPIO pins. Runs Linux, NuttX, and FreeRTOS. Priced from $6.

## Quick Facts

- **Brand:** Pine64
- **Board Type:** sbc
- **Price:** ~$6
- **CPU:** Bouffalo Lab BL808
- **RAM:** 64 MB PSRAM
- **Flash:** 16 MB,128 MB
- **GPIO:** 26 pins
- **USB:** USB-C (USB 2.0 OTG)
- **Power:** 5V via microUSB or USB-C
- **Dimensions:** 51 mm × 21 mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE 5.0 | Zigbee IEEE 802.15.4

## Compatible Firmware

- linux
- nuttx
- freertos
- arduino

## Components

- **BL808** (MCU): Triple-core RISC-V SoC: C906 64-bit @480MHz + E907 32-bit @320MHz + E902 @150MHz with WiFi/BLE/Zigbee and BLAI-100 NPU — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fraw.githubusercontent.com%2Fbouffalolab%2Fbl_docs%2Fmain%2FBL808_DS%2Fen%2FBL808_DS_1.2_en.pdf&ref=openhardware.directory&product=pine64-ox64&source=md-export)
- **GD25LQ16E** (flash): 16 Mbit XSPI NOR Flash (16MB variant) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Fdatasheet%2Fox64%2Fgd25lq16e_rev1.2_20210108.pdf&ref=openhardware.directory&product=pine64-ox64&source=md-export)
- **Chip Antenna** (antenna): 2.4GHz on-board chip antenna with u.FL footprint — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Fox64%2FPINE64_Ox64-Schematic-202221018.pdf&ref=openhardware.directory&product=pine64-ox64&source=md-export)

## Protocols

- **UART0**: TX=GPIO14, RX=GPIO15
- **UART3**: TX=GPIO16, RX=GPIO17
- **SPI0**: MISO=GPIO14, MOSI=GPIO13, SCLK=GPIO15, SS=GPIO12
- **JTAG**: TMS=GPIO6, TDO=GPIO7, TCLK=GPIO12, TDI=GPIO13

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO6 | ADC CH4 / JTAG TMS | — | digital-input, digital-output, adc, jtag |
| GPIO7 | JTAG TDO | — | digital-input, digital-output, jtag |
| GPIO11 | ADC CH3 | — | digital-input, digital-output, adc |
| GPIO12 | ADC CH6 / SPI SS / JTAG TCLK | — | digital-input, digital-output, adc, spi, jtag |
| GPIO13 | ADC CH7 / SPI MOSI / JTAG TDI | — | digital-input, digital-output, adc, spi, jtag |
| GPIO14 | UART0 TX / SPI MISO | — | digital-input, digital-output, uart, spi |
| GPIO15 | UART0 RX / SPI SCLK | — | digital-input, digital-output, uart, spi |
| GPIO16 | UART3 TX (Linux console) | — | digital-input, digital-output, uart |
| GPIO17 | UART3 RX (Linux console) | — | digital-input, digital-output, uart |
| GPIO18 | ADC CH9 | — | digital-input, digital-output, adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** Apache-2.0

## Where to Buy

- [Pine64 Store (16MB)](https://openhardware.directory/r?to=https%3A%2F%2Fpine64.com%2Fproduct%2F16mb-ox64-sbc-available-on-december-2-2022%2F&ref=openhardware.directory&product=pine64-ox64&source=md-export) — $6.00
- [Pine64 Store (128MB)](https://openhardware.directory/r?to=https%3A%2F%2Fpine64.com%2Fproduct%2F128mb-ox64-sbc-available-on-december-2-2022%2F&ref=openhardware.directory&product=pine64-ox64&source=md-export) — $8.00

## Available Software

- [OpenBouffalo Buildroot](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fopenbouffalo%2Fbuildroot_bouffalo&ref=openhardware.directory&product=pine64-ox64&source=md-export) (OS)
- [Bouffalo SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbouffalolab%2Fbouffalo_sdk&ref=openhardware.directory&product=pine64-ox64&source=md-export) (SDK)
- [Apache NuttX (Ox64)](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Flupyuen%2Fnuttx-ox64&ref=openhardware.directory&product=pine64-ox64&source=md-export) (RTOS)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fpine64.com%2Fproduct%2F128mb-ox64-sbc-available-on-december-2-2022%2F&ref=openhardware.directory&product=pine64-ox64&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fopenbouffalo%2Fbuildroot_bouffalo&ref=openhardware.directory&product=pine64-ox64&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.pine64.org%2Fwiki%2FOx64&ref=openhardware.directory&product=pine64-ox64&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fraw.githubusercontent.com%2Fbouffalolab%2Fbl_docs%2Fmain%2FBL808_DS%2Fen%2FBL808_DS_1.2_en.pdf&ref=openhardware.directory&product=pine64-ox64&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.pine64.org%2Fdoc%2Fox64%2FPINE64_Ox64-Schematic-202221018.pdf&ref=openhardware.directory&product=pine64-ox64&source=md-export)

## Tags

`risc-v`, `wifi`, `ble`, `zigbee`, `linux`, `bl808`, `pine64`, `sbc`

---
[View full device page](https://openhardware.directory/s/1370/pine64-ox64)

---

# Heltec MeshTower

> High-power Meshtastic relay/repeater kit with nRF52840 + SX1262 LoRa, 18V/10W solar panel, 3x2800mAh battery pack, IP66 aluminum enclosure, and 5.5dBi fiberglass antenna.

## Quick Facts

- **Brand:** Heltec
- **Board Type:** dev-board
- **Price:** ~$209
- **CPU:** nRF52840
- **RAM:** 256KB SRAM
- **Flash:** 1MB
- **Power:** Solar MPPT (18-25V), USB PD3.0, DC (18-25V)

## Connectivity

Bluetooth BLE 5.0, Bluetooth Mesh

## Compatible Firmware

- meshtastic

## Components

- **nRF52840** (mcu): Nordic Semiconductor nRF52840 ARM Cortex-M4 MCU with Bluetooth 5 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.nordicsemi.com%2Fbundle%2Fps_nrf52840%2Fpage%2Fkeyfeatures_html5.html&ref=openhardware.directory&product=heltec-meshtower&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver supporting 863-928 MHz with +22 dBm output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=heltec-meshtower&source=md-export)

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fheltec-meshtower-based-on-meshsolar&ref=openhardware.directory&product=heltec-meshtower&source=md-export) — $209

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fmeshtower%2F&ref=openhardware.directory&product=heltec-meshtower&source=md-export)

## Tags

`meshtastic`, `solar`, `lora`, `nrf52840`, `sx1262`, `outdoor`, `repeater`, `ip66`

---
[View full device page](https://openhardware.directory/s/1370/heltec-meshtower)

---

# TimeHAT I226 NIC with PPS In/Out for RPi5

> Open-source Raspberry Pi 5 PCIe HAT with Intel I226 2.5G Ethernet NIC, dual SMA connectors for 1PPS input/output, built-in TCXO, and M.2 slot for GNSS modules. Ideal for PTP grandmaster clocks.

## Quick Facts

- **Brand:** TimeAppliances
- **Board Type:** raspberry-pi-hat
- **Price:** ~$200
- **CPU:** None (HAT expansion board — uses host Raspberry Pi 5 BCM2712 processor)
- **RAM:** N/A (expansion board)
- **Flash:** N/A (expansion board)
- **Power:** 5V via RPi 5 GPIO header

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet 2.5 Gbps (Intel I226)

## Components

- **Intel I226-V** (ethernet-controller): 2.5 Gbps PCIe Ethernet controller with hardware IEEE 1588 PTP timestamping, TSN support, and four software-defined pins (SDP0-SDP3) for precision timing I/O. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdrdv2-public.intel.com%2F726883%2Fi225-i226-ethernet-controller-datasheet.pdf&ref=openhardware.directory&product=timehat-i226&source=md-export)
- **ECS TXO53-S3** (tcxo): Temperature-compensated crystal oscillator operating at 33.25 MHz with ±280 ppb frequency stability across the operating temperature range, providing precision clock reference and holdover capability. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fecsxtal.com%2Fstore%2Fpdf%2Ftxo53-s3.pdf&ref=openhardware.directory&product=timehat-i226&source=md-export)
- **sma-connector** (connector): Two SMA coaxial connectors for 1PPS timing signals — SDP0 for PPS output (aligned to PTP clock) and SDP1 for PPS input from external reference sources. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.te.com%2Fcommerce%2FDocumentDelivery%2FDDEController%3FAction%3Dshowdoc%26DocId%3DCustomer%2BDrawing%257F1050170%257FE1%257Fpdf%257FEnglish%257FENG_CD_1050170_E1.pdf&ref=openhardware.directory&product=timehat-i226&source=md-export)
- **ufl-connector** (connector): Spare U.FL coaxial connector providing unbuffered access to SDP3 for additional timing signal routing. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hirose.com%2Fproduct%2Fdocument%3Fclcode%3DCL0331-0471-6-00%26productname%3DU.FL-R-SMT-1%2880%29%26series%3DU.FL%26documenttype%3DCatalog%26lang%3Den%26documentid%3DD31696_en&ref=openhardware.directory&product=timehat-i226&source=md-export)
- **m2-2242-slot** (connector): OCP-compliant M.2 2242 expansion slot for GNSS timing modules (e.g., u-blox NEO-M9N or ZED-F9T) with UART connection to Pi and 1PPS connected to I226 SDP2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.jedec.org%2Fstandards-documents%2Fdocs%2Fmo-300&ref=openhardware.directory&product=timehat-i226&source=md-export)

## Protocols

- **PCIe**
- **PPS**
- **UART**
- **GPIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** CC-BY-NC-4.0

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Ftimeappliances%2Ftimehat-i226-nic-with-pps-inout-for-rpi5%2F&ref=openhardware.directory&product=timehat-i226&source=md-export) — $200.00

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Ftimeappliances%2Ftimehat-i226-nic-with-pps-inout-for-rpi5%2F&ref=openhardware.directory&product=timehat-i226&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FTime-Appliances-Project%2FTimeHAT&ref=openhardware.directory&product=timehat-i226&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdrdv2-public.intel.com%2F726883%2Fi225-i226-ethernet-controller-datasheet.pdf&ref=openhardware.directory&product=timehat-i226&source=md-export)

## Tags

`ptp`, `precision-timing`, `gnss`, `raspberry-pi-5`, `pcie`, `2.5g-ethernet`, `intel-i226`, `pps`, `tcxo`, `time-server`, `grandmaster-clock`, `open-hardware`, `ntp`, `linux-ptp`

---
[View full device page](https://openhardware.directory/s/1370/timehat-i226)

---

# UPduino v3.1

> A low-cost, fully open source FPGA development board built on the Lattice ICE40UP5K with 5.3K LUTs, on-board FTDI FT232H USB programmer, 4MB qSPI flash, and 39 GPIO pins on PMOD-compatible headers.

## Quick Facts

- **Brand:** tinyVision.ai
- **Board Type:** FPGA
- **Price:** ~$36
- **CPU:** Lattice ICE40UP5K (5.3K LUT FPGA)
- **RAM:** 1Mbit SPRAM + 120Kbit DPRAM
- **Flash:** 4MB
- **GPIO:** 39 pins
- **USB:** Micro-USB
- **Power:** 5V

## Connectivity

WiFi No | Bluetooth No | Zigbee No | Ethernet No

## Compatible Firmware

- icestorm
- apio
- yosys

## Components

- **ICE40UP5K** (fpga): Lattice iCE40 UltraPlus 5K FPGA with 5280 LUTs, 1Mbit SPRAM, 120Kbit DPRAM, and 8 DSP multiplier blocks. Ultra-low-power programmable logic supporting open source IceStorm toolchain. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.latticesemi.com%2Fview_document%3Fdocument_id%3D51968&ref=openhardware.directory&product=upduino-v3-1&source=md-export)
- **FT232H** (usb-bridge): FTDI FT232H Hi-Speed USB 2.0 to multipurpose UART/FIFO/SPI/I2C/JTAG bridge IC with Multi-Protocol Synchronous Serial Engine (MPSSE). Used for FPGA programming and debug. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fftdichip.com%2Fwp-content%2Fuploads%2F2025%2F11%2FDS_FT232H.pdf&ref=openhardware.directory&product=upduino-v3-1&source=md-export)
- **W25Q32JV** (flash-memory): Winbond 4MB (32Mbit) serial NOR flash memory with quad SPI (qSPI) interface for FPGA bitstream storage and configuration. Supports up to 133MHz clock speed. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.winbond.com%2Fresource-files%2Fw25q32jv%2520revj%252005302016.pdf&ref=openhardware.directory&product=upduino-v3-1&source=md-export)
- **12MHz Oscillator** (tcxo): Dedicated 12MHz on-board oscillator providing stable clock source for FPGA designs. Accessible via jumper R16 for optional disconnection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fabracon.com%2FOscillators%2FASV.pdf&ref=openhardware.directory&product=upduino-v3-1&source=md-export)
- **RGB LED** (led-driver): On-board RGB LED driven by the ICE40UP5K's internal LED driver IP for status indication and visual output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.latticesemi.com%2Fview_document%3Fdocument_id%3D51968&ref=openhardware.directory&product=upduino-v3-1&source=md-export)

## Protocols

- **SPI**
- **JTAG**
- **QSPI**
- **PMOD**
- **USB**

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** MIT

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Ftinyvision_ai%2Fupduino-v31-low-cost-lattice-ice40-fpga-board%2F&ref=openhardware.directory&product=upduino-v3-1&source=md-export) — $36.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Ftinyvision_ai%2Fupduino-v31-low-cost-lattice-ice40-fpga-board%2F&ref=openhardware.directory&product=upduino-v3-1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ftinyvision-ai-inc%2FUPduino-v3.0&ref=openhardware.directory&product=upduino-v3-1&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fupduino.readthedocs.io&ref=openhardware.directory&product=upduino-v3-1&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ftinyvision-ai-inc%2FUPduino-v3.0%2Fblob%2Fmaster%2FBoard%2Fv3.0%2FUPduino_v3.0.pdf&ref=openhardware.directory&product=upduino-v3-1&source=md-export)

## Tags

`fpga`, `ice40`, `lattice`, `open-source-hardware`, `kicad`, `icestorm`, `yosys`, `risc-v`, `pmod`, `usb-programmer`, `dev-board`

---
[View full device page](https://openhardware.directory/s/1370/upduino-v3-1)

---

# DFRobot Xboard Relay

> Ethernet-controlled dual-relay board with ATmega32u4, WIZnet W5100 Ethernet, XBee socket, and two 10A relays for remote switching of AC/DC loads via web or MQTT, ideal for home automation.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** dev-board
- **Price:** ~$34.95
- **CPU:** ATmega32u4 @ 16MHz, single-core AVR
- **RAM:** 2.5KB SRAM
- **Flash:** 32KB (4KB bootloader)
- **USB:** Micro-USB
- **Power:** 7.2-12V DC or 5V Micro-USB
- **Dimensions:** 73.5 x 53.5mm

## Connectivity

Ethernet 10/100 Mbps (W5100)

## Components

- **ATmega32u4** (mcu): Atmel ATmega32u4 8-bit AVR microcontroller at 16MHz with 32KB flash, 2.5KB SRAM, and native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2Fdevicedoc%2Fatmel-7766-8-bit-avr-atmega16u4-32u4_datasheet.pdf&ref=openhardware.directory&product=dfrobot-xboard-relay&source=md-export)
- **W5100** (ethernet-controller): WIZnet W5100 Ethernet controller with hardwired TCP/IP stack, 10/100Mbps, supporting 4 simultaneous sockets. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wiznet.io%2Fwp-content%2Fuploads%2Fwiznethome%2FChip%2FW5100%2FDocument%2FW5100_Datasheet_v1.2.7.pdf&ref=openhardware.directory&product=dfrobot-xboard-relay&source=md-export)
- **HRS4H-S-DC5V** (relay): Two onboard 10A SPDT relays rated for 150VAC/24VDC with UL rating, 10ms operating time. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-837.html&ref=openhardware.directory&product=dfrobot-xboard-relay&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| A0 | Analog Input | — | digital-input, digital-output, adc |
| A1 | Analog Input | — | digital-input, digital-output, adc |
| D2 | Digital I/O | — | digital-input, digital-output |
| D3 | Digital I/O | — | digital-input, digital-output |
| D5 | Digital I/O | — | digital-input, digital-output |
| D6 | Digital I/O | — | digital-input, digital-output |
| SDA | I2C Data | — | digital-input, digital-output |
| SCL | I2C Clock | — | digital-input, digital-output |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-837.html&ref=openhardware.directory&product=dfrobot-xboard-relay&source=md-export) — 34.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-837.html&ref=openhardware.directory&product=dfrobot-xboard-relay&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FX-Board_Relay_SKU_DFR0222_&ref=openhardware.directory&product=dfrobot-xboard-relay&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-xboard-relay)

---

# Banana Pi M5

> Banana Pi M5 is a quad-core SBC powered by the Amlogic S905X3 SoC with 4GB LPDDR4 RAM, 16GB eMMC, four USB 3.0 ports, and Gigabit Ethernet, running Armbian Linux.

## Quick Facts

- **Brand:** Banana Pi
- **Board Type:** linux-sbc
- **Price:** ~$53
- **CPU:** Amlogic S905X3
- **RAM:** 4GB LPDDR4
- **Flash:** 16GB eMMC
- **USB:** 4x USB 3.0 Type-A
- **Power:** 12V DC barrel jack

## Connectivity

Ethernet Gigabit Ethernet (10/100/1000M)

## Compatible Firmware

- armbian

## Components

- **Amlogic S905X3** (soc): Amlogic S905X3 quad-core Cortex-A55 SoC at 2.0GHz with Mali-G31 GPU and 4K H.265 hardware decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amlogic.com%2F%23Products%2F393%2Findex.html&ref=openhardware.directory&product=bananapi-m5&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2F1005001833539893.html&ref=openhardware.directory&product=bananapi-m5&source=md-export) — $53.00

## Links

- [product](https://openhardware.directory/r?to=http%3A%2F%2Fwww.banana-pi.org%2Fen%2Fbanana-pi-sbcs%2F167.html&ref=openhardware.directory&product=bananapi-m5&source=md-export)
- [vendor](https://openhardware.directory/r?to=http%3A%2F%2Fwww.banana-pi.org%2Fen%2Fbanana-pi-sbcs%2F167.html&ref=openhardware.directory&product=bananapi-m5&source=md-export)

## Tags

`banana-pi`, `amlogic`, `s905x3`, `sbc`, `linux`, `armbian`, `nas`, `single-board-computer`, `usb3`, `gigabit-ethernet`

---
[View full device page](https://openhardware.directory/s/1370/bananapi-m5)

---

# Tinker Board / S

> Raspberry Pi form factor SBC by ASUS featuring the Rockchip RK3288 SoC, 2GB LPDDR3, WiFi 802.11n+Bluetooth 4.0, Gigabit Ethernet, and 4× USB 2.0. The S model adds 16GB eMMC.

## Quick Facts

- **Brand:** ASUS
- **Board Type:** linux-sbc
- **Price:** ~$139
- **CPU:** Quad-core Cortex-A17 @ 1.8GHz (Rockchip RK3288)
- **RAM:** 2GB LPDDR3
- **Flash:** 16GB eMMC (S model) / microSD only (standard)
- **USB:** 4× USB 2.0 Type-A
- **Power:** 5V via Micro-USB

## Connectivity

WiFi 802.11n (WiFi 4) | Bluetooth 4.0 | Ethernet Gigabit

## Compatible Firmware

- armbian

## Components

- **RK3288** (soc): Rockchip RK3288 quad-core Cortex-A17 @ 1.8GHz SoC with Mali-T764 GPU and hardware video decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK33_Series%2F2014%2F0929%2F663.html&ref=openhardware.directory&product=tinkerboard&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Tinkersphere](https://openhardware.directory/r?to=https%3A%2F%2Ftinkersphere.com%2Fraspberry-pi-orange-pi-boards%2F4153-asus-tinker-board-s-single-board-computer-rk3288.html&ref=openhardware.directory&product=tinkerboard&source=md-export) — $139.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.asus.com%2Fsingle-board-computer%2Ftinker-board%2F&ref=openhardware.directory&product=tinkerboard&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Ftinkerboard%2F&ref=openhardware.directory&product=tinkerboard&source=md-export)

## Tags

`media-center`, `desktop`, `rockchip`, `rk3288`, `wifi`, `gigabit`, `rpi-form-factor`

---
[View full device page](https://openhardware.directory/s/1370/tinkerboard)

---

# Arduino Mega 2560 R3

> High-pin-count Arduino board based on the ATmega2560 at 16 MHz with 256KB flash, 54 digital I/O pins, 16 analog inputs, and 4 hardware UARTs for complex projects.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$47.8
- **CPU:** ATmega2560 @ 16 MHz
- **RAM:** 8 KB
- **Flash:** 256 KB
- **Power:** 5V via USB or 7-12V DC barrel jack
- **Dimensions:** 101.52 × 53.3 mm

## Compatible Firmware

- arduino
- platformio

## Components

- **ATmega2560** (mcu): 8-bit AVR RISC microcontroller at 16 MHz with 256KB flash, 8KB SRAM, 4KB EEPROM, 54 digital I/O, 16 analog inputs — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F191%2FATmega640-1280-1281-2560-2561-Datasheet-DS40002211A.pdf&ref=openhardware.directory&product=arduino-mega-2560-r3&source=md-export)

## Protocols

- **UART**: TX0=D1, RX0=D0, TX1=D18, RX1=D19, TX2=D16, RX2=D17, TX3=D14, RX3=D15
- **SPI**: MOSI=D51, MISO=D50, SCK=D52, SS=D53
- **I2C**: SDA=D20, SCL=D21
- **ICSP**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX0 | — | digital-input, digital-output |
| D1 | TX0 | — | digital-input, digital-output |
| D2 | GPIO / INT4 / PWM | — | digital-input, digital-output, pwm, interrupt |
| D3 | GPIO / INT5 / PWM | — | digital-input, digital-output, pwm, interrupt |
| D4 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D7 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D8 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D9 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D10 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D11 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D12 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D13 | LED / PWM | — | digital-input, digital-output, pwm |
| D14 | TX3 | — | digital-input, digital-output |
| D15 | RX3 | — | digital-input, digital-output |
| D16 | TX2 | — | digital-input, digital-output |
| D17 | RX2 | — | digital-input, digital-output |
| D18 | TX1 / INT3 | — | digital-input, digital-output, interrupt |
| D19 | RX1 / INT2 | — | digital-input, digital-output, interrupt |
| D20 | SDA / INT1 | — | digital-input, digital-output, interrupt |
| D21 | SCL / INT0 | — | digital-input, digital-output, interrupt |
| D50 | MISO | — | digital-input, digital-output |
| D51 | MOSI | — | digital-input, digital-output |
| D52 | SCK | — | digital-input, digital-output |
| D53 | SS | — | digital-input, digital-output |
| A0 | Analog 0 / D54 | — | analog-input, digital-input, digital-output |
| A1 | Analog 1 / D55 | — | analog-input, digital-input, digital-output |
| A2 | Analog 2 / D56 | — | analog-input, digital-input, digital-output |
| A3 | Analog 3 / D57 | — | analog-input, digital-input, digital-output |
| A4 | Analog 4 / D58 | — | analog-input, digital-input, digital-output |
| A5 | Analog 5 / D59 | — | analog-input, digital-input, digital-output |
| A6 | Analog 6 / D60 | — | analog-input, digital-input, digital-output |
| A7 | Analog 7 / D61 | — | analog-input, digital-input, digital-output |
| A8 | Analog 8 / D62 | — | analog-input, digital-input, digital-output |
| A9 | Analog 9 / D63 | — | analog-input, digital-input, digital-output |
| A10 | Analog 10 / D64 | — | analog-input, digital-input, digital-output |
| A11 | Analog 11 / D65 | — | analog-input, digital-input, digital-output |
| A12 | Analog 12 / D66 | — | analog-input, digital-input, digital-output |
| A13 | Analog 13 / D67 | — | analog-input, digital-input, digital-output |
| A14 | Analog 14 / D68 | — | analog-input, digital-input, digital-output |
| A15 | Analog 15 / D69 | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Farduino-mega-2560-rev3&ref=openhardware.directory&product=arduino-mega-2560-r3&source=md-export) — $47.80
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Farduino-mega-2560-rev3&ref=openhardware.directory&product=arduino-mega-2560-r3&source=md-export) — €52.80
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FA000067%2F3476357&ref=openhardware.directory&product=arduino-mega-2560-r3&source=md-export) — $48.40
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FA000067&ref=openhardware.directory&product=arduino-mega-2560-r3&source=md-export) — $48.40
- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB0046AMGW0&ref=openhardware.directory&product=arduino-mega-2560-r3&source=md-export) — $48.40
- [SparkFun](https://openhardware.directory/r?to=https%3A%2F%2Fwww.sparkfun.com%2Farduino-mega-2560-r3.html&ref=openhardware.directory&product=arduino-mega-2560-r3&source=md-export) — $48.40
- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F191&ref=openhardware.directory&product=arduino-mega-2560-r3&source=md-export) — $48.50

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F191&ref=openhardware.directory&product=arduino-mega-2560-r3&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F191%2FATmega640-1280-1281-2560-2561-Datasheet-DS40002211A.pdf&ref=openhardware.directory&product=arduino-mega-2560-r3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fmega-2560&ref=openhardware.directory&product=arduino-mega-2560-r3&source=md-export)

## Tags

`arduino`, `atmega2560`, `avr`, `microcontroller`, `development-board`, `high-pin-count`

---
[View full device page](https://openhardware.directory/s/1370/arduino-mega-2560-r3)

---

# Arduino Micro

> Smallest official Arduino with native USB, based on ATmega32u4 at 16 MHz. Breadboard-friendly at 48×18mm with 20 I/O pins, 12 analog inputs, and USB HID/CDC emulation capability.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$21.8
- **CPU:** ATmega32u4 @ 16 MHz
- **RAM:** 2.5 KB
- **Flash:** 32 KB
- **Power:** 5V via Micro USB or 7-12V Vin pin
- **Dimensions:** 48 × 18 mm

## Compatible Firmware

- arduino
- platformio

## Components

- **ATmega32u4** (mcu): 8-bit AVR microcontroller with native USB at 16 MHz, 32KB flash, 2.5KB SRAM, 1KB EEPROM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=arduino-micro&source=md-export)

## Protocols

- **UART**: TX=D1, RX=D0
- **SPI**: MOSI=D16, MISO=D14, SCK=D15, SS=D10
- **I2C**: SDA=D2, SCL=D3
- **USB**
- **ICSP**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX / INT2 | — | digital-input, digital-output, interrupt |
| D1 | TX / INT3 | — | digital-input, digital-output, interrupt |
| D2 | SDA / INT1 | — | digital-input, digital-output, interrupt |
| D3 | SCL / INT0 / PWM | — | digital-input, digital-output, pwm, interrupt |
| D4 | GPIO / A6 | — | digital-input, digital-output, analog-input |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / A7 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D7 | GPIO / INT6 | — | digital-input, digital-output, interrupt |
| D8 | GPIO / A8 | — | digital-input, digital-output, analog-input |
| D9 | GPIO / A9 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D10 | SS / A10 / PWM | — | digital-input, digital-output, analog-input, pwm |
| D11 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D12 | GPIO / A11 | — | digital-input, digital-output, analog-input |
| D13 | LED / PWM | — | digital-input, digital-output, pwm |
| D14 | MISO | — | digital-input, digital-output |
| D15 | SCK | — | digital-input, digital-output |
| D16 | MOSI | — | digital-input, digital-output |
| A0 | Analog 0 / D18 | — | analog-input, digital-input, digital-output |
| A1 | Analog 1 / D19 | — | analog-input, digital-input, digital-output |
| A2 | Analog 2 / D20 | — | analog-input, digital-input, digital-output |
| A3 | Analog 3 / D21 | — | analog-input, digital-input, digital-output |
| A4 | Analog 4 / D22 | — | analog-input, digital-input, digital-output |
| A5 | Analog 5 / D23 | — | analog-input, digital-input, digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Farduino-micro&ref=openhardware.directory&product=arduino-micro&source=md-export) — $21.80
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Farduino-micro&ref=openhardware.directory&product=arduino-micro&source=md-export) — €24.10
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FA000053%2F4486332&ref=openhardware.directory&product=arduino-micro&source=md-export) — $23.50
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FA000053&ref=openhardware.directory&product=arduino-micro&source=md-export) — $23.50
- [Amazon US](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB00AFY2S56&ref=openhardware.directory&product=arduino-micro&source=md-export) — $23.50

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F1086&ref=openhardware.directory&product=arduino-micro&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fmicro&ref=openhardware.directory&product=arduino-micro&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=arduino-micro&source=md-export)

## Tags

`arduino`, `atmega32u4`, `native-usb`, `usb-hid`, `breadboard-friendly`, `compact`

---
[View full device page](https://openhardware.directory/s/1370/arduino-micro)

---

# Adafruit GEMMA v2

> Tiny 27mm round sewable wearable microcontroller with ATtiny85 at 8 MHz, 3 GPIO, Micro USB programming, 3.3V power, and reverse-polarity protection — ideal for small LED and NeoPixel wearable projects.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$9.95
- **CPU:** ATtiny85 @ 8 MHz
- **RAM:** 512 bytes
- **Flash:** 8 KB
- **Power:** 3.3V via Micro USB or battery (up to 16V)
- **Dimensions:** 27.98 mm diameter × 7.14 mm

## Compatible Firmware

- arduino

## Components

- **ATtiny85** (mcu): 8-bit AVR microcontroller at 8 MHz with 8KB flash, 512B SRAM, 512B EEPROM and 5 I/O pins — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FATtiny25-45-85-Datasheet-DS40002187A.pdf&ref=openhardware.directory&product=adafruit-gemma-v2&source=md-export)

## Protocols

- **I2C**: SDA=D0, SCL=D2
- **SPI**
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | SDA / PWM / A1 | — | digital-input, digital-output, pwm, analog-input |
| D1 | GPIO / PWM / LED | — | digital-input, digital-output, pwm |
| D2 | SCL / A1 | — | digital-input, digital-output, analog-input |
| D3 | USB- | — | digital-input, digital-output |
| D4 | USB+ / A2 | — | digital-input, digital-output, analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F1222&ref=openhardware.directory&product=adafruit-gemma-v2&source=md-export) — 9.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F1222&ref=openhardware.directory&product=adafruit-gemma-v2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fintroducing-gemma%2Fintroduction&ref=openhardware.directory&product=adafruit-gemma-v2&source=md-export)

## Tags

`wearable`, `sewable`, `attiny85`, `neopixel`, `tiny`, `adafruit`, `gemma`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-gemma-v2)

---

# Adafruit Trinket 3.3V

> Tiny 27×15mm Arduino-compatible microcontroller board with ATtiny85 at 8 MHz, 3.3V logic, 8KB flash, 3 GPIO pins, and Micro USB programming for minimal space-constrained projects.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$6.95
- **CPU:** ATtiny85 @ 8 MHz
- **RAM:** 512 bytes
- **Flash:** 8 KB
- **Power:** 3.3V via Micro USB or up to 16V external
- **Dimensions:** 27 × 15 mm

## Compatible Firmware

- arduino

## Components

- **ATtiny85** (mcu): 8-bit AVR microcontroller at 8 MHz with 8KB flash, 512B SRAM, 512B EEPROM and 5 I/O pins — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FATtiny25-45-85-Datasheet-DS40002187A.pdf&ref=openhardware.directory&product=adafruit-trinket-3v&source=md-export)

## Protocols

- **I2C**: SDA=D0, SCL=D2
- **SPI**
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | SDA / PWM / A0 | — | digital-input, digital-output, pwm, analog-input |
| D1 | GPIO / PWM / LED | — | digital-input, digital-output, pwm |
| D2 | SCL / A1 | — | digital-input, digital-output, analog-input |
| D3 | USB- / A3 | — | digital-input, digital-output, analog-input |
| D4 | USB+ / A2 | — | digital-input, digital-output, analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F1500&ref=openhardware.directory&product=adafruit-trinket-3v&source=md-export) — 6.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F1500&ref=openhardware.directory&product=adafruit-trinket-3v&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fintroducing-trinket&ref=openhardware.directory&product=adafruit-trinket-3v&source=md-export)

## Tags

`attiny85`, `tiny`, `3.3v`, `arduino-compatible`, `minimal`, `adafruit`, `trinket`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-trinket-3v)

---

# Adafruit Trinket 5V

> Tiny 31×15mm Arduino-compatible microcontroller with ATtiny85 at 8–16 MHz, 5V logic, 8KB flash, 3 GPIO pins, and Micro USB — the 5V variant for interfacing with 5V sensors and NeoPixel LEDs.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$6.95
- **CPU:** ATtiny85 @ 8-16 MHz
- **RAM:** 512 bytes
- **Flash:** 8 KB
- **Power:** 5V via Micro USB or up to 16V external
- **Dimensions:** 31 × 15.5 mm

## Compatible Firmware

- arduino

## Components

- **ATtiny85** (mcu): 8-bit AVR microcontroller configurable at 8-16 MHz with 8KB flash, 512B SRAM, 512B EEPROM and 5 I/O pins — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FATtiny25-45-85-Datasheet-DS40002187A.pdf&ref=openhardware.directory&product=adafruit-trinket-5v&source=md-export)

## Protocols

- **I2C**: SDA=D0, SCL=D2
- **SPI**
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | SDA / PWM / A0 | — | digital-input, digital-output, pwm, analog-input |
| D1 | GPIO / PWM / LED | — | digital-input, digital-output, pwm |
| D2 | SCL / A1 | — | digital-input, digital-output, analog-input |
| D3 | USB- / A3 | — | digital-input, digital-output, analog-input |
| D4 | USB+ / A2 | — | digital-input, digital-output, analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F1501&ref=openhardware.directory&product=adafruit-trinket-5v&source=md-export) — 6.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F1501&ref=openhardware.directory&product=adafruit-trinket-5v&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fintroducing-trinket&ref=openhardware.directory&product=adafruit-trinket-5v&source=md-export)

## Tags

`attiny85`, `tiny`, `5v`, `arduino-compatible`, `neopixel`, `adafruit`, `trinket`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-trinket-5v)

---

# Adafruit ItsyBitsy 32u4 3V 8MHz

> Ultra-compact 3.3V Arduino-compatible board with ATmega32u4 at 8MHz, native USB HID, 23 GPIO pins, 2KB RAM, 28KB flash, and Micro USB. Measures 35mm × 17mm — smaller than a Feather with equivalent AVR capability.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$9.95
- **CPU:** Atmel ATmega32u4 AVR
- **RAM:** 2 KB
- **Flash:** 28 KB
- **GPIO:** 23 pins
- **Power:** 3.3V via Micro USB or up to 6V via VIN pin
- **Dimensions:** 35mm × 17mm × 4.2mm

## Compatible Firmware

- arduino

## Components

- **ATmega32u4** (mcu): 8-bit AVR microcontroller at 8 MHz with 32KB flash, 2.5KB SRAM, native USB HID/CDC/MIDI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=adafruit-itsybitsy-32u4-3v&source=md-export)

## Protocols

- **I2C**: SDA=D2, SCL=D3
- **SPI**: MOSI=D16, MISO=D14, SCK=D15, SS=D10
- **UART**: TX=D1, RX=D0
- **USB-HID**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX | — | digital-input, digital-output |
| D1 | TX | — | digital-input, digital-output |
| D2 | SDA | — | digital-input, digital-output |
| D3 | SCL | — | digital-input, digital-output, pwm |
| D4 | GPIO | — | digital-input, digital-output |
| D5 | GPIO | — | digital-input, digital-output, pwm |
| D6 | GPIO | — | digital-input, digital-output, pwm |
| D7 | GPIO | — | digital-input, digital-output |
| D9 | GPIO | — | digital-input, digital-output, pwm |
| D10 | SS | — | digital-input, digital-output, pwm |
| D11 | GPIO | — | digital-input, digital-output, pwm |
| D12 | GPIO | — | digital-input, digital-output |
| D13 | LED | — | digital-input, digital-output |
| D14 | MISO | — | digital-input, digital-output |
| D15 | SCK | — | digital-input, digital-output |
| D16 | MOSI | — | digital-input, digital-output |
| A0 | ADC | — | digital-input, digital-output, analog-input |
| A1 | ADC | — | digital-input, digital-output, analog-input |
| A2 | ADC | — | digital-input, digital-output, analog-input |
| A3 | ADC | — | digital-input, digital-output, analog-input |
| A4 | ADC | — | digital-input, digital-output, analog-input |
| A5 | ADC | — | digital-input, digital-output, analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3675&ref=openhardware.directory&product=adafruit-itsybitsy-32u4-3v&source=md-export) — 9.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3675&ref=openhardware.directory&product=adafruit-itsybitsy-32u4-3v&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3675&ref=openhardware.directory&product=adafruit-itsybitsy-32u4-3v&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fintroducting-itsy-bitsy-32u4&ref=openhardware.directory&product=adafruit-itsybitsy-32u4-3v&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-ItsyBitsy-32u4-PCB&ref=openhardware.directory&product=adafruit-itsybitsy-32u4-3v&source=md-export)

## Tags

`arduino`, `atmega32u4`, `usb-hid`, `3v3`, `compact`, `adafruit`, `itsybitsy`, `avr`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-itsybitsy-32u4-3v)

---

# Adafruit Pro Trinket 5V

> Compact ATmega328P-based Arduino-compatible board at 16 MHz, 5V, with 28KB flash, 18 GPIO, Micro USB, FTDI header, and mounting holes — a miniaturized UNO with battery-friendly power management.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$9.95
- **CPU:** ATmega328P @ 16 MHz
- **RAM:** 2 KB
- **Flash:** 28 KB
- **Power:** 5V via Micro USB or up to 16V external
- **Dimensions:** 38 × 18 mm

## Compatible Firmware

- arduino
- platformio

## Components

- **ATmega328P** (mcu): 8-bit AVR RISC microcontroller at 16 MHz in QFN package, 32KB flash, 2KB SRAM — same chip as Arduino UNO — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf&ref=openhardware.directory&product=adafruit-pro-trinket-5v&source=md-export)

## Protocols

- **UART**: TX=D1, RX=D0
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, SS=D10
- **I2C**: SDA=A4, SCL=A5
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX | — | digital-input, digital-output |
| D1 | TX | — | digital-input, digital-output |
| D2 | USB D- (reserved) | — | digital-input, digital-output |
| D3 | GPIO / PWM | — | digital-input, digital-output, pwm, interrupt |
| D4 | GPIO | — | digital-input, digital-output |
| D5 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D6 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D7 | USB D+ (reserved) | — | digital-input, digital-output |
| D8 | GPIO | — | digital-input, digital-output |
| D9 | GPIO / PWM | — | digital-input, digital-output, pwm |
| D10 | SS / PWM | — | digital-input, digital-output, pwm |
| D11 | MOSI / PWM | — | digital-input, digital-output, pwm |
| D12 | MISO | — | digital-input, digital-output |
| D13 | SCK / LED | — | digital-input, digital-output |
| A0 | Analog 0 / D14 | — | analog-input, digital-input, digital-output |
| A1 | Analog 1 / D15 | — | analog-input, digital-input, digital-output |
| A2 | Analog 2 / D16 | — | analog-input, digital-input, digital-output |
| A3 | Analog 3 / D17 | — | analog-input, digital-input, digital-output |
| A4 | SDA / Analog 4 / D18 | — | analog-input, digital-input, digital-output |
| A5 | SCL / Analog 5 / D19 | — | analog-input, digital-input, digital-output |
| A6 | Analog 6 | — | analog-input |
| A7 | Analog 7 | — | analog-input |
| A8 | Analog 8 | — | analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2000&ref=openhardware.directory&product=adafruit-pro-trinket-5v&source=md-export) — 9.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2000&ref=openhardware.directory&product=adafruit-pro-trinket-5v&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fintroducing-pro-trinket&ref=openhardware.directory&product=adafruit-pro-trinket-5v&source=md-export)

## Tags

`atmega328p`, `5v`, `arduino-compatible`, `compact`, `adafruit`, `pro-trinket`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-pro-trinket-5v)

---

# Raspberry Pi Zero WH

> Raspberry Pi Zero W with pre-soldered 40-pin GPIO headers. BCM2835 single-core 1GHz ARM11, 512MB RAM, built-in 802.11 b/g/n WiFi (BCM43143), Bluetooth LE, Mini HDMI, Micro USB, and MicroSD. No soldering required.

## Quick Facts

- **Brand:** Raspberry Pi
- **Board Type:** dev-board
- **Price:** ~$16
- **CPU:** Broadcom BCM2835 ARM11 single-core
- **RAM:** 512 MB
- **Flash:** N/A (MicroSD card)
- **Power:** 5V via Micro USB power port
- **Dimensions:** 65mm × 31mm × 11.6mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 4.0 LE

## Compatible Firmware

- micropython

## Components

- **BCM2835** (mcu): Single-core ARM11 (ARMv6) SoC at 1 GHz with VideoCore IV GPU, 512MB LPDDR2 SDRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fbcm2835%2Fbcm2835-peripherals.pdf&ref=openhardware.directory&product=raspberry-pi-zero-wh&source=md-export)
- **BCM43143** (wireless-module): Cypress BCM43143 combination 802.11 b/g/n WiFi and Bluetooth LE chip. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.cypress.com%2Ffile%2F298811%2Fdownload&ref=openhardware.directory&product=raspberry-pi-zero-wh&source=md-export)

## Protocols

- **I2C**: SDA=GPIO2, SCL=GPIO3
- **SPI**: MOSI=GPIO10, MISO=GPIO9, SCK=GPIO11, CE0=GPIO8, CE1=GPIO7
- **UART**: TX=GPIO14, RX=GPIO15
- **I2S**: BCLK=GPIO18, LRCLK=GPIO19, DATA=GPIO21
- **PWM**: PWM0=GPIO18, PWM1=GPIO19

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | SDA | — | digital-input, digital-output |
| GPIO3 | SCL | — | digital-input, digital-output |
| GPIO4 | GPIO | — | digital-input, digital-output |
| GPIO9 | MISO | — | digital-input, digital-output |
| GPIO10 | MOSI | — | digital-input, digital-output |
| GPIO11 | SCK | — | digital-input, digital-output |
| GPIO14 | TX | — | digital-input, digital-output |
| GPIO15 | RX | — | digital-input, digital-output |
| GPIO17 | GPIO | — | digital-input, digital-output |
| GPIO18 | GPIO/PWM | — | digital-input, digital-output, pwm |
| GPIO22 | GPIO | — | digital-input, digital-output |
| GPIO23 | GPIO | — | digital-input, digital-output |
| GPIO24 | GPIO | — | digital-input, digital-output |
| GPIO25 | GPIO | — | digital-input, digital-output |
| GPIO27 | GPIO | — | digital-input, digital-output |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3708&ref=openhardware.directory&product=raspberry-pi-zero-wh&source=md-export) — 16

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3708&ref=openhardware.directory&product=raspberry-pi-zero-wh&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3708&ref=openhardware.directory&product=raspberry-pi-zero-wh&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fproducts%2Fraspberry-pi-zero-w%2F&ref=openhardware.directory&product=raspberry-pi-zero-wh&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fraspberrypi&ref=openhardware.directory&product=raspberry-pi-zero-wh&source=md-export)

## Tags

`raspberry-pi`, `linux`, `wifi`, `bluetooth`, `gpio-headers`, `sbc`, `compact`, `python`

## Certifications

FCC, CE, RoHS

---
[View full device page](https://openhardware.directory/s/1370/raspberry-pi-zero-wh)

---

# Heltec CubeCell 1/2AA Node (HTCC-AB02A)

> Ultra-low-power LoRa/LoRaWAN development node based on the ASR6502 SoC (ARM Cortex-M0+ @ 48MHz + SX1262), with a built-in 1/2AA battery holder, 3.5uA deep sleep, and Arduino compatibility. Ideal for remote sensor deployments.

## Quick Facts

- **Brand:** Heltec
- **Price:** ~$12.9
- **CPU:** ARM Cortex-M0,single-core @ 48MHz (PSoC 4000 series)
- **RAM:** 16KB SRAM
- **Flash:** 128KB
- **USB:** Micro-USB (CP2102)
- **Power:** Micro-USB 5V / 1/2AA 3.6V lithium battery
- **Dimensions:** 56.6 × 24 × 21.5mm

## Components

- **ASR6502** (mcu): PSoC 4000 series ARM Cortex-M0+ running at 48MHz with 128KB flash and 16KB SRAM, integrating the SX1262 LoRa transceiver for a single-chip LoRaWAN solution. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02A%2FAB02A.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export)
- **SX1262** (radio): Semtech SX1262 long-range, low-power sub-GHz RF transceiver supporting LoRa and (G)FSK modulation across 150-960MHz bands, with +22dBm output power and -135dBm receive sensitivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F6%2Fb%2F5%2F1%2F4%2FSX1262_datasheet.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export)
- **CP2102** (usb-serial): Silicon Labs CP2102 USB-to-UART bridge providing serial communication over Micro-USB for programming and debugging. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export)

## Protocols

- **UART** (UART1): TX=GPIO5 (P3_1), RX=GPIO5 (P3_0)
- **UART** (UART2): TX=GPIO (P4_5), RX=GPIO (P4_4)
- **SPI** (SPI0): SCK=P4_2, MOSI=P4_0, MISO=P4_1, SS=P4_3
- **SPI** (SPI1): SCK=GPIO3 (P6_2), MOSI=GPIO1 (P6_0), MISO=GPIO2 (P6_1)
- **I2C** (I2C0): SDA=P0_1, SCL=P0_0
- **I2C** (I2C1): SDA=GPIO9 (P7_1), SCL=GPIO8 (P7_0)
- **SWD**: SWDIO=SWDIO, SWCLK=SWCLK

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | SPI1 MOSI / Digital I/O | — | digital-input, digital-output |
| GPIO2 | SPI1 MISO / Digital I/O | — | digital-input, digital-output |
| GPIO3 | SPI1 CLK / PWM1 | — | digital-input, digital-output, pwm |
| GPIO4 | PWM2 / Digital I/O | — | digital-input, digital-output, pwm |
| GPIO5 | Vext Control (P3_4) | — | digital-input, digital-output |
| GPIO6 | Digital I/O (P3_6) | — | digital-input, digital-output |
| GPIO7 | Digital I/O (P3_7) | — | digital-input, digital-output |
| GPIO8 | I2C1 SCL | — | digital-input, digital-output |
| GPIO9 | I2C1 SDA | — | digital-input, digital-output |
| GPIO10 | Digital I/O (P7_2) | — | digital-input, digital-output |
| GPIO11 | Digital I/O (P0_2) | — | digital-input, digital-output |
| GPIO12 | Digital I/O (P0_3) | — | digital-input, digital-output |
| GPIO13 | LED / Digital I/O (P0_6) | — | digital-input, digital-output |
| GPIO14 | Digital I/O (P0_7) | — | digital-input, digital-output |
| ADC1 | 12-bit Analog Input (P2_0) | — | adc, digital-input |
| ADC2 | 12-bit Analog Input (P2_1) | — | adc, digital-input |

## Where to Buy

- [Heltec Official](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhtcc-ab02a%2F&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export) — 12.90
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-HTCC-AB02A-Applications-Development-902-928MHz%2Fdp%2FB0D2LD7ZTX&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export) — 12.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhtcc-ab02a%2F&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FCubeCell-Arduino&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fcubecell-series%2Fhtcc_ab02a%2F&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02A%2FAB02A.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02A%2FHTCC-AB02A_SchematicDiagram.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export)

## Tags

`lora`, `lorawan`, `iot`, `low-power`, `sensor-node`, `asr6502`, `sx1262`, `heltec`, `cubecell`, `arduino`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/heltec-cubecell-htcc-ab02a)

---

# Arduino Opta WiFi

> Industrial micro PLC with STM32H747 dual-core Cortex-M7/M4, WiFi, BLE, Ethernet, 4\u00d72.3kW relays, Modbus TCP/RTU, hardware security, DIN rail mount, and IEC 61131-3 PLC programming — co-developed with Finder for real industrial automation.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** industrial-controller
- **Price:** ~$168
- **CPU:** ARM Cortex-M7 @ 480MHz,Cortex-M4 @ 240MHz
- **RAM:** 1MB SRAM
- **Flash:** 2MB
- **USB:** USB-C
- **Power:** 12-24V DC industrial
- **Dimensions:** DIN rail (4 modules wide)

## Connectivity

WiFi 802.11 b/g/n | Bluetooth BLE | Ethernet 10/100 Mbps

## Compatible Firmware

- arduino

## Components

- **STM32H747XI** (mcu): STM32H747XI with Cortex-M7 at 480MHz and Cortex-M4 at 240MHz for real-time PLC control. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32h747xi.pdf&ref=openhardware.directory&product=arduino-opta-wifi&source=md-export)

## Protocols

- **Modbus TCP**: notes=Via Ethernet port
- **Modbus RTU**: notes=Via RS-485
- **Ethernet**: notes=RJ45 port
- **I2C**: notes=Via expansion port

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| I1 | Analog/Digital Input | — | digital-input, adc |
| I2 | Analog/Digital Input | — | digital-input, adc |
| I3 | Analog/Digital Input | — | digital-input, adc |
| I4 | Analog/Digital Input | — | digital-input, adc |
| I5 | Analog/Digital Input | — | digital-input, adc |
| I6 | Analog/Digital Input | — | digital-input, adc |
| I7 | Analog/Digital Input | — | digital-input, adc |
| I8 | Analog/Digital Input | — | digital-input, adc |
| R1 | Relay Output (2.3kW) | — | digital-output |
| R2 | Relay Output (2.3kW) | — | digital-output |
| R3 | Relay Output (2.3kW) | — | digital-output |
| R4 | Relay Output (2.3kW) | — | digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fopta-wifi&ref=openhardware.directory&product=arduino-opta-wifi&source=md-export) — $168.00
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fopta-wifi&ref=openhardware.directory&product=arduino-opta-wifi&source=md-export) — €185.23
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FAFX00002%2F17629432&ref=openhardware.directory&product=arduino-opta-wifi&source=md-export) — $195.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FAFX00002&ref=openhardware.directory&product=arduino-opta-wifi&source=md-export) — $195.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fopta-wifi&ref=openhardware.directory&product=arduino-opta-wifi&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fopta%2F&ref=openhardware.directory&product=arduino-opta-wifi&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FAFX00002-datasheet.pdf&ref=openhardware.directory&product=arduino-opta-wifi&source=md-export)

## Tags

`arduino`, `opta`, `plc`, `industrial`, `wifi`, `ethernet`, `modbus`, `relay`, `din-rail`

## Certifications

CE, UL

---
[View full device page](https://openhardware.directory/s/1370/arduino-opta-wifi)

---

# Arduino Opta Lite

> Entry-level industrial micro PLC with STM32H747 dual-core Cortex-M7/M4, Ethernet, 4\u00d72.3kW relays, Modbus TCP, hardware security, DIN rail mount, and IEC 61131-3 PLC programming — the affordable path to Arduino-powered industrial control.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** industrial-controller
- **Price:** ~$127
- **CPU:** ARM Cortex-M7 @ 480MHz,Cortex-M4 @ 240MHz
- **RAM:** 1MB SRAM
- **Flash:** 2MB
- **USB:** USB-C
- **Power:** 12-24V DC industrial
- **Dimensions:** DIN rail (4 modules wide)

## Connectivity

Ethernet 10/100 Mbps

## Compatible Firmware

- arduino

## Components

- **STM32H747XI** (mcu): STM32H747XI with Cortex-M7 at 480MHz and Cortex-M4 at 240MHz for real-time PLC control. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32h747xi.pdf&ref=openhardware.directory&product=arduino-opta-lite&source=md-export)

## Protocols

- **Modbus TCP**: notes=Via Ethernet port
- **Ethernet**: notes=RJ45 port
- **I2C**: notes=Via expansion port

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| I1 | Analog/Digital Input | — | digital-input, adc |
| I2 | Analog/Digital Input | — | digital-input, adc |
| I3 | Analog/Digital Input | — | digital-input, adc |
| I4 | Analog/Digital Input | — | digital-input, adc |
| I5 | Analog/Digital Input | — | digital-input, adc |
| I6 | Analog/Digital Input | — | digital-input, adc |
| I7 | Analog/Digital Input | — | digital-input, adc |
| I8 | Analog/Digital Input | — | digital-input, adc |
| R1 | Relay Output (2.3kW) | — | digital-output |
| R2 | Relay Output (2.3kW) | — | digital-output |
| R3 | Relay Output (2.3kW) | — | digital-output |
| R4 | Relay Output (2.3kW) | — | digital-output |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fopta-lite&ref=openhardware.directory&product=arduino-opta-lite&source=md-export) — $127.00
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fopta-lite&ref=openhardware.directory&product=arduino-opta-lite&source=md-export) — €140.76
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FAFX00003%2F17629433&ref=openhardware.directory&product=arduino-opta-lite&source=md-export) — $148.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FAFX00003&ref=openhardware.directory&product=arduino-opta-lite&source=md-export) — $148.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fopta-lite&ref=openhardware.directory&product=arduino-opta-lite&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fopta%2F&ref=openhardware.directory&product=arduino-opta-lite&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FAFX00003-datasheet.pdf&ref=openhardware.directory&product=arduino-opta-lite&source=md-export)

## Tags

`arduino`, `opta`, `plc`, `industrial`, `ethernet`, `modbus`, `relay`, `din-rail`

## Certifications

CE, UL

---
[View full device page](https://openhardware.directory/s/1370/arduino-opta-lite)

---

# BigTreeTech Octopus Max EZ V1.0

> High-end 32-bit 3D printer control board with STM32H723ZET6 MCU at 550MHz, 10 EZ-socket stepper driver slots, CAN bus, eFuse protection, and Marlin/Klipper firmware support.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$74.86
- **CPU:** STM32H723ZET6
- **RAM:** 564KB
- **Flash:** 1MB
- **USB:** USB Type-C
- **Power:** DC 12V or 24V (main); HV up to 56V (motor)
- **Dimensions:** 160 x 100 mm

## Compatible Firmware

- Marlin
- Klipper

## Components

- **STM32H723ZET6** (mcu): STMicroelectronics ARM Cortex-M7 at 550MHz, 1MB Flash, 564KB SRAM with DSP and FPU. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32h723ze.pdf&ref=openhardware.directory&product=bigtreetech-octopus-max-ez-v1-0&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**
- **CAN bus**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-btt-octopusmax-ez-for-3d-printer&ref=openhardware.directory&product=bigtreetech-octopus-max-ez-v1-0&source=md-export) — $74.86

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FOctopus-Max-EZ&ref=openhardware.directory&product=bigtreetech-octopus-max-ez-v1-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-btt-octopusmax-ez-for-3d-printer&ref=openhardware.directory&product=bigtreetech-octopus-max-ez-v1-0&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.bttwiki.com%2FOctopus%2520MAX%2520EZ.html&ref=openhardware.directory&product=bigtreetech-octopus-max-ez-v1-0&source=md-export)

## Tags

`3d-printer`, `control-board`, `stm32`, `stm32h723`, `marlin`, `klipper`, `ez-driver`, `stepper-driver`, `can-bus`, `efuse`, `bigtreetech`, `open-source`, `cortex-m7`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-octopus-max-ez-v1-0)

---

# pic0rick Pico Ultrasound Pulse-Echo System

> OSHWA-certified open-source ultrasound development kit built around the Raspberry Pi Pico (RP2040). Features a 60 Msps 10-bit ADC, AD8331 time-gain amplifier, and three-level bipolar pulser for NDT and education.

## Quick Facts

- **Brand:** kelu124
- **Board Type:** dev-board
- **Price:** ~$299
- **CPU:** RP2040 ARM Cortex-M0+ dual-core @ 133MHz
- **RAM:** 264 KB
- **Flash:** 2 MB (on Pico W)
- **GPIO:** 26 GPIO (RP2040) pins
- **USB:** Micro-USB (via Raspberry Pi Pico)
- **Power:** 5V

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet false

## Components

- **RP2040** (MCU): Dual-core ARM Cortex-M0+ microcontroller at 133 MHz with 264 KB SRAM and dual PIO blocks for high-speed ADC acquisition and VGA output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=pic0rick&source=md-export)
- **AD8331** (Amplifier): Ultralow noise variable-gain amplifier providing 7.5 dB to 55.5 dB continuous gain range with 120 MHz bandwidth for ultrasound time-gain compensation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FAD8331_8332_8334.pdf&ref=openhardware.directory&product=pic0rick&source=md-export)
- **MCP4812** (DAC): 10-bit dual-channel SPI DAC with internal voltage reference used to control the AD8331 gain via programmable analog voltage. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F20002249B.pdf&ref=openhardware.directory&product=pic0rick&source=md-export)
- **MD1210** (Pulser): High-speed ultrasound MOSFET driver for controlling the TC6320 complementary MOSFET pair in three-level pulse generation circuits. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F20005605A.pdf&ref=openhardware.directory&product=pic0rick&source=md-export)
- **TC6320** (Pulser): High-voltage complementary N/P-channel MOSFET pair for bipolar ultrasound pulse generation, driven by the MD1210. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F21571B.pdf&ref=openhardware.directory&product=pic0rick&source=md-export)

## Protocols

- **SPI**
- **PMOD**
- **ADC**
- **GPIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** TAPR-OHL

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fkelu124%2Fpic0rick-a-pico-ultrasound-pulse-echo-system%2F&ref=openhardware.directory&product=pic0rick&source=md-export) — $299.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fkelu124%2Fpic0rick-a-pico-ultrasound-pulse-echo-system%2F&ref=openhardware.directory&product=pic0rick&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fkelu124%2Fpic0rick&ref=openhardware.directory&product=pic0rick&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fun0rick.cc%2Fpic0rick&ref=openhardware.directory&product=pic0rick&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fkelu124%2Fpic0rick&ref=openhardware.directory&product=pic0rick&source=md-export)

## Tags

`ultrasound`, `pulse-echo`, `ndt`, `non-destructive-testing`, `rp2040`, `raspberry-pi-pico`, `open-hardware`, `oshwa`, `adc`, `tgc`, `signal-processing`, `pmod`

## Certifications

OSHWA

---
[View full device page](https://openhardware.directory/s/1370/pic0rick)

---

# Ai-Thinker Ra-09-DTU

> Intelligent wireless LoRaWAN DTU with isolated RS485 interface, powered by STM32WLE5CCU6 ARM Cortex-M4 MCU with integrated Sub-GHz radio. Wide 6-36V input for industrial deployment.

## Quick Facts

- **Brand:** Ai-Thinker
- **Board Type:** DTU
- **Price:** ~$4.32
- **CPU:** ARM Cortex-M4 @ 48MHz, FPU, DSP, AES-256 hardware crypto
- **RAM:** 64KB SRAM
- **Flash:** 256KB
- **USB:** none
- **Power:** 6-36V DC (wide voltage input)

## Compatible Firmware

- stm32cubewl

## Components

- **STM32WLE5CCU6** (mcu): STMicroelectronics STM32WLE5CCU6 — ARM Cortex-M4 @ 48MHz with integrated LoRa/FSK/MSK/BPSK sub-GHz transceiver (410-525MHz), 256KB flash, 64KB SRAM, AES-256 hardware encryption, 12-bit ADC/DAC, DMA, and deep sleep as low as 0.1µA. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32wle5c8.pdf&ref=openhardware.directory&product=ai-thinker-ra-09-dtu&source=md-export)
- **rs485-transceiver** (interface-ic): Electrically isolated RS485 transceiver for half-duplex serial communication, providing noise immunity and ground loop protection in industrial environments. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.ai-thinker.com%2Fen%2FRa-09%2F&ref=openhardware.directory&product=ai-thinker-ra-09-dtu&source=md-export)

## Protocols

- **RS-485**: A=RS485_A, B=RS485_B
- **UART**: TX=UART_TX, RX=UART_RX
- **LoRa**: ANT=IPEX connector

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LCSC Electronics](https://openhardware.directory/r?to=https%3A%2F%2Fwww.lcsc.com%2Fproduct-detail%2FC41368033.html&ref=openhardware.directory&product=ai-thinker-ra-09-dtu&source=md-export) — $4.32
- [Alibaba](https://openhardware.directory/r?to=https%3A%2F%2Fwww.alibaba.com%2Fproduct-detail%2FAi-Thinker-intelligent-wireless-data-communication_1601355973830.html&ref=openhardware.directory&product=ai-thinker-ra-09-dtu&source=md-export) — Contact seller

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fen.ai-thinker.com%2Fpro_view-164.html&ref=openhardware.directory&product=ai-thinker-ra-09-dtu&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FAi-Thinker-Open%2FAi-Thinker-LoRaWAN-Ra-09&ref=openhardware.directory&product=ai-thinker-ra-09-dtu&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.ai-thinker.com%2Fen%2FRa-09%2F&ref=openhardware.directory&product=ai-thinker-ra-09-dtu&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32wle5c8.pdf&ref=openhardware.directory&product=ai-thinker-ra-09-dtu&source=md-export)

## Tags

`lorawan`, `rs485`, `dtu`, `industrial-iot`, `stm32wl`, `sub-ghz`, `ai-thinker`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/ai-thinker-ra-09-dtu)

---

# LuckFox Pico WebBee

> Ultra-compact Rockchip RV1103 Linux micro development board in USB dongle form factor with 10/100Mbps Ethernet, 64MB DDR2, 128MB NAND flash, and ABS protective case. Ideal for lightweight web servers, USB scripting, and smart home IoT.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** dev-board
- **Price:** ~$19.99
- **CPU:** ARM Cortex-A7 @ 1.2GHz + RISC-V MCU, 0.5 TOPS NPU
- **RAM:** 64MB DDR2
- **Flash:** 128MB SLC NAND
- **USB:** USB Type-A 2.0 (Host/Device)
- **Power:** 5V via USB Type-A
- **Dimensions:** 61.5 × 22.9 × 15.1mm

## Connectivity

Ethernet 10/100 Mbps

## Components

- **RV1103** (soc): Rockchip RV1103 G1 SoC with single ARM Cortex-A7 @ 1.2GHz, RISC-V MCU co-processor, 0.5 TOPS NPU, 4MP ISP, integrated audio codec and 10/100M Ethernet MAC PHY. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Frockchips.net%2Fwp-content%2Fuploads%2F2025%2F03%2FRockchip-RV1103-Datasheet-V1.4-20230725.pdf&ref=openhardware.directory&product=waveshare-luckfox-webbee&source=md-export)
- **W25N01KV** (flash-memory): Winbond W25N01KV 128MB (1Gbit) SLC NAND flash memory for boot and system storage. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.winbond.com%2Fhq%2Fproduct%2Fcode-storage-flash-memory%2Fserial-nand-flash%2F%3F__locale%3Den%26partNo%3DW25N01KV&ref=openhardware.directory&product=waveshare-luckfox-webbee&source=md-export)

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-webbee.htm&ref=openhardware.directory&product=waveshare-luckfox-webbee&source=md-export) — 19.99
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FWaveshare-Development-Integrates-Cortex-A7-Protective%2Fdp%2FB0DPMSRQJR&ref=openhardware.directory&product=waveshare-luckfox-webbee&source=md-export) — 21.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-webbee.htm&ref=openhardware.directory&product=waveshare-luckfox-webbee&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=waveshare-luckfox-webbee&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Pico-WebBee&ref=openhardware.directory&product=waveshare-luckfox-webbee&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Frockchips.net%2Fwp-content%2Fuploads%2F2025%2F03%2FRockchip-RV1103-Datasheet-V1.4-20230725.pdf&ref=openhardware.directory&product=waveshare-luckfox-webbee&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-luckfox-webbee)

---

# Espressif ESP32-C6-DevKitC-1

> Official Espressif development board for the ESP32-C6, combining WiFi 6, BLE 5, and IEEE 802.15.4 (Thread/Zigbee/Matter) on a RISC-V single-core SoC — ideal for Matter-native IoT and smart home development.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$10
- **CPU:** RISC-V RV32IMAC single-core HP @ 160MHz + LP core @ 20MHz, hardware crypto (AES/SHA/RSA/ECC)
- **RAM:** 512KB SRAM + 16KB LP SRAM
- **Flash:** 8MB (QSPI)
- **USB:** USB-C 2.0 (native OTG, up to 12Mbps) + USB-C to UART bridge
- **Power:** 5V

## Connectivity

WiFi 802.11ax (WiFi 6, 2.4GHz) | Bluetooth BLE 5 | Zigbee Zigbee 3.0

## Components

- **ESP32-C6-WROOM-1** (mcu): Single-core RISC-V @ 160MHz with WiFi 6, BLE 5, and IEEE 802.15.4 (Thread/Zigbee/Matter). 8MB flash, hardware AES/SHA/RSA/ECC crypto, secure boot. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=espressif-esp32-c6-devkitc-1&source=md-export)
- **WS2812B** (led-driver): Single WS2812 addressable RGB LED on GPIO8 for visual status indication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=espressif-esp32-c6-devkitc-1&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | GPIO / ADC / SPI CLK | — | digital-input, digital-output, adc, pwm |
| GPIO1 | GPIO / ADC / SPI CS | — | digital-input, digital-output, adc, pwm |
| GPIO2 | GPIO / ADC / SPI MOSI | — | digital-input, digital-output, adc, pwm |
| GPIO3 | GPIO / ADC / SPI MISO | — | digital-input, digital-output, adc, pwm |
| GPIO4 | GPIO / ADC / MTMS | — | digital-input, digital-output, adc, strapping |
| GPIO5 | GPIO / ADC / MTDI | — | digital-input, digital-output, adc, strapping |
| GPIO6 | GPIO / ADC / MTCK | — | digital-input, digital-output, adc |
| GPIO7 | GPIO / ADC / MTDO | — | digital-input, digital-output, adc |
| GPIO8 | RGB LED / strapping | — | digital-output, strapping |
| GPIO9 | Boot button / strapping | — | digital-input, strapping |
| GPIO10 | GPIO / ADC | — | digital-input, digital-output, adc, pwm |
| GPIO11 | GPIO / ADC / VDD_SPI | — | digital-input, digital-output |
| GPIO12 | GPIO / SPI flash CLK | — | digital-input, digital-output |
| GPIO13 | GPIO / SPI flash Q | — | digital-input, digital-output |
| GPIO14 | GPIO / SPI flash WP | — | digital-input, digital-output |
| GPIO15 | GPIO / strapping | — | digital-input, digital-output, strapping |
| GPIO16 | UART TX | — | digital-output, pwm |
| GPIO17 | UART RX | — | digital-input, pwm |
| GPIO18 | GPIO / USB D- | — | digital-input, digital-output |
| GPIO19 | GPIO / USB D+ | — | digital-input, digital-output |
| GPIO22 | I2C SDA | — | digital-input, digital-output, pwm |
| GPIO23 | I2C SCL | — | digital-input, digital-output, pwm |

## Where to Buy

- [Espressif / AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fen%2Fcompany%2Fcontact%2Fbuy-a-sample&ref=openhardware.directory&product=espressif-esp32-c6-devkitc-1&source=md-export) — 10.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.espressif.com%2Fprojects%2Fesp-dev-kits%2Fen%2Flatest%2Fesp32c6%2Fesp32-c6-devkitc-1%2Fuser_guide.html&ref=openhardware.directory&product=espressif-esp32-c6-devkitc-1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-dev-kits%2Ftree%2Fmaster%2Fesp32-c6-devkitc-1&ref=openhardware.directory&product=espressif-esp32-c6-devkitc-1&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fdl.espressif.com%2Fdl%2Fschematics%2Fesp32-c6-devkitc-1-schematics_v1.4.pdf&ref=openhardware.directory&product=espressif-esp32-c6-devkitc-1&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6-wroom-1_wroom-1u_datasheet_en.pdf&ref=openhardware.directory&product=espressif-esp32-c6-devkitc-1&source=md-export)

## Tags

`esp32-c6`, `wifi6`, `matter`, `thread`, `zigbee`, `ble`, `risc-v`, `espressif`, `devkit`

---
[View full device page](https://openhardware.directory/s/1370/espressif-esp32-c6-devkitc-1)

---

# Radxa Rock 5B

> High-performance Rockchip RK3588 SBC from Radxa with up to 32GB LPDDR4X, NVMe M.2, WiFi 6, 2.5GbE, and USB-C PD power — a flagship Linux board in the Raspberry Pi 4 form factor.

## Quick Facts

- **Brand:** Radxa
- **Board Type:** linux-sbc
- **Price:** ~$79.99
- **CPU:** Rockchip RK3588
- **RAM:** 4GB / 8GB / 16GB / 32GB LPDDR4X
- **Flash:** eMMC socket (optional)
- **Power:** 5V-20V via USB-C PD

## Connectivity

WiFi WiFi 6 (802.11ax) | Bluetooth BLE 5.0 | Ethernet 2.5 Gbps (RTL8125BG)

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arace Tech](https://openhardware.directory/r?to=https%3A%2F%2Farace.tech%2Fproducts%2Fradxa-rock-5b-blue&ref=openhardware.directory&product=radxa-rock-5b&source=md-export) — $79.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Frock5%2F5b&ref=openhardware.directory&product=radxa-rock-5b&source=md-export)
- [armbian](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Frock-5b%2F&ref=openhardware.directory&product=radxa-rock-5b&source=md-export)

## Tags

`radxa`, `rock5b`, `rk3588`, `sbc`, `linux`, `armbian`, `nvme`, `wifi6`, `2.5gbe`

---
[View full device page](https://openhardware.directory/s/1370/radxa-rock-5b)

---

# BeagleY-AI

> Raspberry Pi HAT-compatible edge AI SBC by BeagleBoard.org, powered by the TI AM67A SoC with 4 TOPS neural accelerator, 4GB LPDDR4, 16GB eMMC, WiFi, and Gigabit Ethernet.

## Quick Facts

- **Brand:** BeagleBoard.org
- **Board Type:** linux-sbc
- **Price:** ~$70
- **CPU:** Quad-core Cortex-A53 @ 1.4GHz + C7x DSP (TI AM67A)
- **RAM:** 4GB LPDDR4
- **Flash:** 16GB eMMC
- **USB:** USB-C 3.0
- **Power:** 5V

## Connectivity

WiFi 802.11ac (WiFi 5) | Bluetooth BLE 5.0 | Ethernet Gigabit

## Compatible Firmware

- armbian

## Components

- **AM67A** (soc): TI AM67A quad-core Cortex-A53 @ 1.4GHz with C7x DSP and 4 TOPS MMA neural accelerator for edge vision applications. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FAM67A&ref=openhardware.directory&product=beagley-ai&source=md-export)

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Fbeagleboard-by-seeed-studio%2F102991834%2F22532596&ref=openhardware.directory&product=beagley-ai&source=md-export) — $70.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.beagleboard.org%2Fboards%2Fbeagley-ai&ref=openhardware.directory&product=beagley-ai&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fbeagley-ai%2F&ref=openhardware.directory&product=beagley-ai&source=md-export)

## Tags

`ai`, `edge-ai`, `npu`, `raspberry-pi-compatible`, `hat`, `ti`, `beagle`, `vision`

---
[View full device page](https://openhardware.directory/s/1370/beagley-ai)

---

# BeagleBone Black

> Low-cost, community-supported ARM Cortex-A8 development platform with 512MB DDR3L, 4GB eMMC, HDMI, USB, 10/100M Ethernet, 2x PRUs, and expandable via BeagleBone capes. Boots Linux in under 10 seconds.

## Quick Facts

- **Brand:** BeagleBoard
- **Board Type:** Single Board Computer
- **Price:** ~$53.75
- **CPU:** TI Sitara AM3358 (ARM Cortex-A8 @ 1 GHz)
- **RAM:** 512MB DDR3L
- **Flash:** 4GB eMMC
- **GPIO:** 2x 46-pin headers (92 pins) pins
- **USB:** USB 2.0 (miniUSB client,Type-A host)
- **Power:** 5V DC via miniUSB or DC jack

## Connectivity

Ethernet 10/100M Ethernet

## Compatible Firmware

- Debian Linux

## Components

- **AM3358** (processor): Texas Instruments Sitara AM3358 SoC with 1GHz ARM Cortex-A8, SGX530 3D graphics, NEON accelerator, and 2x 200MHz PRUs for real-time I/O — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FAM3358&ref=openhardware.directory&product=beaglebone-black&source=md-export)
- **TPS65217C** (pmic): Texas Instruments single-chip PMIC with three step-down converters, four LDOs, and battery charger for system power regulation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FTPS65217&ref=openhardware.directory&product=beaglebone-black&source=md-export)
- **512MB DDR3L** (memory): 512MB DDR3L SDRAM at 800MHz for OS and application execution — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FAM3358&ref=openhardware.directory&product=beaglebone-black&source=md-export)
- **4GB eMMC** (storage): 4GB 8-bit embedded MMC flash storage pre-loaded with Linux for instant boot — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FAM3358&ref=openhardware.directory&product=beaglebone-black&source=md-export)

## Protocols

- **USB 2.0**
- **HDMI**
- **UART**
- **I2C**
- **SPI**
- **ADC**
- **PWM**
- **JTAG**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Fbeagleboard-by-seeed-studio%2F102110420%2F12719590&ref=openhardware.directory&product=beaglebone-black&source=md-export) — $53.75
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FBeagleBoard-by-Seeed-Studio%2F102110420%3Fqs%3DvmHwEFxEFR8FZOWBwz8ZDA%253D%253D&ref=openhardware.directory&product=beaglebone-black&source=md-export) — $53.75
- [Newark](https://openhardware.directory/r?to=https%3A%2F%2Fwww.newark.com%2Fbeagleboard%2F102110420%2Fbeaglebone-black%2Fdp%2F21AM0173&ref=openhardware.directory&product=beaglebone-black&source=md-export) — $53.75

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.beagleboard.org%2Fboards%2Fbeaglebone-black&ref=openhardware.directory&product=beaglebone-black&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fopenbeagle.org%2Fbeagleboard%2Fbeaglebone-black&ref=openhardware.directory&product=beaglebone-black&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.beagleboard.org%2Flatest%2Fboards%2Fbeaglebone%2Fblack%2F&ref=openhardware.directory&product=beaglebone-black&source=md-export)

## Tags

`beagleboard`, `arm-cortex-a8`, `single-board-computer`, `linux`, `open-hardware`, `education`, `pru`, `beginner-friendly`

---
[View full device page](https://openhardware.directory/s/1370/beaglebone-black)

---

# Libre Computer Renegade Elite

> Libre Computer Renegade Elite (ROC-RK3399-PC) — Rockchip RK3399 SBC with dual Cortex-A72 + quad Cortex-A53, 4GB LPDDR4, M.2 PCIe, DisplayPort 1.2, HDMI 2.0, and UEFI BIOS in a 120×72mm form factor.

## Quick Facts

- **Brand:** Libre Computer
- **Board Type:** Single Board Computer
- **Price:** ~$80
- **CPU:** Rockchip RK3399
- **RAM:** 4GB LPDDR4
- **Flash:** 128Mb SPI NOR,MicroSD,eMMC 5.x
- **USB:** 2× USB-C 3.0 (DP),3× USB 2.0 Type-A
- **Power:** USB-C PD

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- Ubuntu
- Debian
- Armbian
- Mainline Linux

## Components

- **Rockchip RK3399** (SoC): Dual Cortex-A72 @ 2GHz + Quad Cortex-A53 @ 1.8GHz with crypto extensions — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fopensource.rock-chips.com%2Fimages%2Fd%2Fd7%2FRockchip_RK3399_Datasheet_V2.1-20200323.pdf&ref=openhardware.directory&product=libre-computer-renegade-elite&source=md-export)
- **Mali-T860 MP4** (GPU): OpenGL ES 3.2, OpenCL 1.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.arm.com%2FProcessors%2FMali-T860&ref=openhardware.directory&product=libre-computer-renegade-elite&source=md-export)
- **RK3399 VPU** (Video Decoder): H.265/H.264/VP9 4K decode with dual output pipeline — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fopensource.rock-chips.com%2Fimages%2Fd%2Fd7%2FRockchip_RK3399_Datasheet_V2.1-20200323.pdf&ref=openhardware.directory&product=libre-computer-renegade-elite&source=md-export)
- **SPI NOR 128Mb** (Flash): 128Mb SPI NOR flash for UEFI BIOS firmware — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fopensource.rock-chips.com%2Fimages%2Fd%2Fd7%2FRockchip_RK3399_Datasheet_V2.1-20200323.pdf&ref=openhardware.directory&product=libre-computer-renegade-elite&source=md-export)

## Protocols

- **HDMI 2.0**
- **DisplayPort 1.2**
- **PCIe 2.0 x4**
- **USB 3.0**
- **USB 2.0**
- **eDP**
- **MIPI DSI**
- **I2C**
- **SPI**
- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [LoveRPi](https://openhardware.directory/r?to=https%3A%2F%2Fwww.loverpi.com%2Fproducts%2Flibre-computer-board-roc-rk3399-pc-pre-order&ref=openhardware.directory&product=libre-computer-renegade-elite&source=md-export) — $80.00
- [Libre Computer](https://openhardware.directory/r?to=https%3A%2F%2Flibre.computer%2Fproducts%2Froc-rk3399-pc%2F&ref=openhardware.directory&product=libre-computer-renegade-elite&source=md-export) — $80.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flibre.computer%2Fproducts%2Froc-rk3399-pc%2F&ref=openhardware.directory&product=libre-computer-renegade-elite&source=md-export)

## Tags

`sbc`, `single-board-computer`, `rockchip`, `rk3399`, `pcie`, `m2`, `displayport`, `hdmi`, `uefi`, `arm`, `cortex-a72`, `cortex-a53`, `libre-computer`

---
[View full device page](https://openhardware.directory/s/1370/libre-computer-renegade-elite)

---

# LILYGO T-BHI260AP

> Compact breakout board for the Bosch BHI260AP AI-powered IMU, featuring a 6-axis accelerometer and gyroscope with an onboard programmable AI neural network co-processor for motion pattern recognition and gesture detection.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** sensor-module
- **Price:** ~$4.58
- **CPU:** BHI260AP (AI Neural Network Co-Processor)
- **RAM:** 64KB
- **Flash:** 4MB
- **Power:** 3.3V

## Compatible Firmware

- arduino

## Components

- **BHI260AP** (accelerometer): Bosch 6-axis AI-powered IMU with onboard programmable neural network co-processor for gesture and activity recognition — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bhi260ap-ds000.pdf&ref=openhardware.directory&product=lilygo-t-bhi260ap&source=md-export)

## Protocols

- **I2C**
- **SPI**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-bhi260ap&ref=openhardware.directory&product=lilygo-t-bhi260ap&source=md-export) — $4.58

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-bhi260ap&ref=openhardware.directory&product=lilygo-t-bhi260ap&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO&ref=openhardware.directory&product=lilygo-t-bhi260ap&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bhi260ap-ds000.pdf&ref=openhardware.directory&product=lilygo-t-bhi260ap&source=md-export)

## Tags

`bhi260ap`, `bosch`, `imu`, `ai`, `accelerometer`, `gyroscope`, `motion-sensing`, `sensor-module`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-bhi260ap)

---

# LILYGO T-Bat

> Solar-capable power management module based on CN3065 for charging an 18650 Li-ion battery via Micro USB, solar panel input (5.3V+), or BAT input, with 5V/1A USB output for powering devices up to 1A current draw.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** Power Module
- **Price:** ~$3.56
- **CPU:** CN3065 (Power Management IC)
- **RAM:** none
- **Flash:** none
- **Power:** 5V + Solar

## Components

- **CN3065** (battery-charger): CN3065 power management IC supporting solar panel and USB input for 18650 Li-ion battery charging with 5V/1A output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.consonance-elec.com%2Fpdf%2Fdatasheet%2Fcn3065.pdf&ref=openhardware.directory&product=lilygo-t-bat&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-bat&ref=openhardware.directory&product=lilygo-t-bat&source=md-export) — $3.56

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-bat&ref=openhardware.directory&product=lilygo-t-bat&source=md-export)

## Tags

`power-management`, `solar`, `battery`, `cn3065`, `18650`, `charging`, `power-module`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-bat)

---

# Sonoff BasicR2

> WiFi smart switch based on ESP8285, widely used in the open-source home automation community. Easily flashable with Tasmota or ESPHome for local-only smart home control without cloud dependency.

## Quick Facts

- **Brand:** Sonoff
- **Board Type:** smart-switch
- **Price:** ~$4.9
- **CPU:** ESP8285
- **RAM:** 80KB
- **Flash:** 1MB
- **Power:** 100-240V AC

## Connectivity

WiFi 802.11 b/g/n

## Compatible Firmware

- tasmota
- esphome
- arduino

## Components

- **ESP8285** (MCU): Espressif ESP8285 — single-core Xtensa LX106 at 80MHz with built-in 1MB flash and WiFi 802.11 b/g/n. Pin-compatible with ESP8266 but with integrated flash. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2F0a-esp8285_datasheet_en.pdf&ref=openhardware.directory&product=sonoff-basicr2&source=md-export)
- **10A Relay** (Relay): Single-pole single-throw relay rated for 10A at 250V AC, used to switch mains-powered loads like lights and small appliances. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fdiy-smart-switches%2Fbasicr2%2F&ref=openhardware.directory&product=sonoff-basicr2&source=md-export)

## Protocols

- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fseeed-studio-sonoff-basicr2-wifi-smart-switch-smart-home-voice-control&ref=openhardware.directory&product=sonoff-basicr2&source=md-export) — $8.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fdiy-smart-switches%2Fbasicr2%2F&ref=openhardware.directory&product=sonoff-basicr2&source=md-export)

## Tags

`sonoff`, `esp8285`, `tasmota`, `esphome`, `smart-switch`, `smart-home`, `home-automation`, `wifi`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/sonoff-basicr2)

---

# BlueMicro PyKey60

> Open-source 60% mechanical keyboard PCB with RP2040 MCU, per-key RGB NeoPixel LEDs, Kailh hot-swap sockets, onboard buzzer, and USB-C. Runs KMK and CircuitPython firmware.

## Quick Facts

- **Brand:** BlueMicro
- **Board Type:** keyboard-pcb
- **Price:** ~$50
- **CPU:** ARM Cortex-M0+ dual-core @ 133MHz (RP2040)
- **RAM:** 264KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi No | Bluetooth No | Zigbee No | Ethernet No

## Compatible Firmware

- KMK
- circuitpython

## Components

- **RP2040** (mcu): Raspberry Pi dual-core ARM Cortex-M0+ microcontroller running at 133MHz with 264KB SRAM, 30 multifunction GPIO pins, programmable I/O (PIO), and native USB 1.1 support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=pykey60&source=md-export)
- **W25Q128JV** (flash): Winbond 128Mbit (16MB) serial NOR flash memory with SPI/Dual-SPI/Quad-SPI interface, operating at up to 133MHz for firmware and CircuitPython library storage. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.winbond.com%2Fresource-files%2Fw25q128jv%2520revf%252003272018%2520plus.pdf&ref=openhardware.directory&product=pykey60&source=md-export)
- **WS2812B** (led): Addressable RGB LED with integrated WS2812B driver IC, supporting daisy-chained single-wire serial control at 800Kbps for per-key underglow lighting effects. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=pykey60&source=md-export)
- **kailh-hot-swap-socket** (connector): PCB-mount hot-swap sockets allowing tool-free insertion and removal of Cherry MX-compatible mechanical keyboard switches without soldering. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.kailhswitch.com%2Fmechanical-keyboard-switches%2Fbox-switches%2Fhot-swap-pcb-socket.html&ref=openhardware.directory&product=pykey60&source=md-export)
- **piezo-buzzer** (audio): Onboard piezoelectric transducer providing audio feedback for keystrokes, layer changes, and configurable tone alerts. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.murata.com%2Fen-us%2Fproducts%2Fsound%2Fsounder%2Foverview&ref=openhardware.directory&product=pykey60&source=md-export)

## Protocols

- **USB**
- **SPI**
- **GPIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** CERN-OHL-W-2.0

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fjpconstantineau%2Fpykey60-rgb-keyboard-pcb-with-a-rp2040%2F&ref=openhardware.directory&product=pykey60&source=md-export) — $50.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fjpconstantineau%2Fpykey60-rgb-keyboard-pcb-with-a-rp2040%2F&ref=openhardware.directory&product=pykey60&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fjpconstantineau%2FPyKey60&ref=openhardware.directory&product=pykey60&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fpykey.jpconstantineau.com&ref=openhardware.directory&product=pykey60&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fjpconstantineau%2FPyKey60&ref=openhardware.directory&product=pykey60&source=md-export)

## Tags

`mechanical-keyboard`, `rp2040`, `circuitpython`, `kmk`, `rgb`, `hot-swap`, `60-percent`, `open-hardware`, `neopixel`, `gh60`

---
[View full device page](https://openhardware.directory/s/1370/pykey60)

---

# Waveshare RP2040-Zero

> Ultra-compact RP2040 microcontroller board in a tiny form factor. Features dual-core Cortex-M0+ at 133 MHz, USB-C, onboard WS2812 RGB LED, and castellated pads. Raspberry Pi Pico compatible.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$3.99
- **CPU:** RP2040
- **RAM:** 264 KB
- **Flash:** 2 MB
- **GPIO:** 29 pins
- **USB:** USB-C
- **Power:** 5V

## Compatible Firmware

- micropython
- circuitpython
- arduino
- C/C++ SDK

## Components

- **RP2040** (Processor): Raspberry Pi's custom dual-core ARM Cortex-M0+ microcontroller running at up to 133 MHz with 264 KB SRAM and programmable I/O. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=rp2040-zero&source=md-export)
- **WS2812B** (LED): Individually addressable RGB LED with integrated driver IC for colorful status indication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812.pdf&ref=openhardware.directory&product=rp2040-zero&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **PWM**
- **ADC**
- **PIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Frp2040-zero-a-pico&ref=openhardware.directory&product=rp2040-zero&source=md-export) — $3.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2040-zero.htm&ref=openhardware.directory&product=rp2040-zero&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRP2040-Zero&ref=openhardware.directory&product=rp2040-zero&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fraspberrypi%2Fpico-sdk&ref=openhardware.directory&product=rp2040-zero&source=md-export)

## Tags

`rp2040`, `micropython`, `circuitpython`, `compact`, `microcontroller`, `usb-c`

---
[View full device page](https://openhardware.directory/s/1370/rp2040-zero)

---

# TP4056 Charge Controller Module

> Li-Ion/LiPo battery charging module based on the TP4056 IC with built-in battery protection circuit. Mini USB 5V input, 1A charging current. Essential for portable and battery-powered IoT projects.

## Quick Facts

- **Brand:** OpenELAB
- **Board Type:** module
- **Price:** ~$2.79
- **CPU:** N/A (charge controller module)
- **RAM:** N/A
- **Flash:** N/A
- **Power:** 5V via Mini USB

## Components

- **TP4056** (Charge Controller): Complete constant-current/constant-voltage linear charger for single-cell lithium-ion batteries with 1A programmable charge current — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdlnmh9ip6v2uc.cloudfront.net%2Fdatasheets%2FPrototyping%2FTP4056.pdf&ref=openhardware.directory&product=tp4056-charge-controller&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Ftp4056-charge-controller&ref=openhardware.directory&product=tp4056-charge-controller&source=md-export) — $2.79

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Ftp4056-charge-controller&ref=openhardware.directory&product=tp4056-charge-controller&source=md-export)

## Tags

`battery-charger`, `lipo`, `li-ion`, `tp4056`, `power-management`

---
[View full device page](https://openhardware.directory/s/1370/tp4056-charge-controller)

---

# Home Assistant Connect ZWA-2

> Z-Wave 700 series USB stick for Home Assistant, based on Silicon Labs EFR32ZG23. Plug-and-play Z-Wave coordinator with long range support, designed by Nabu Casa for seamless Home Assistant integration.

## Quick Facts

- **Brand:** Nabu Casa
- **Board Type:** usb-dongle
- **Price:** ~$29.99
- **CPU:** EFR32ZG23
- **RAM:** 64 KB
- **Flash:** 512 KB
- **USB:** USB 2.0 Type-A
- **Power:** 5V

## Compatible Firmware

- z-wave-js

## Components

- **EFR32ZG23** (MCU): Silicon Labs EFR32ZG23 — ARM Cortex-M33 MCU with integrated Z-Wave 700 series radio and Z-Wave Long Range support — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2Fefr32zg23-datasheet.pdf&ref=openhardware.directory&product=home-assistant-connect-zwa-2&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fseeed-studio-home-assistant-connect-zwa-2&ref=openhardware.directory&product=home-assistant-connect-zwa-2&source=md-export) — $99.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.home-assistant.io%2Fconnect%2Fzwa-2&ref=openhardware.directory&product=home-assistant-connect-zwa-2&source=md-export)

## Tags

`z-wave`, `usb-dongle`, `home-assistant`, `nabu-casa`, `smart-home`, `coordinator`

## Certifications

FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/home-assistant-connect-zwa-2)

---

# Sonoff SNZB-01P

> Zigbee 3.0 wireless button and scene switch with single, double, and long press actions. Battery-powered with CR2477 lasting up to 5 years. Works with Home Assistant, Zigbee2MQTT, and eWeLink.

## Quick Facts

- **Brand:** Sonoff
- **Board Type:** smart-button
- **Price:** ~$12.85
- **CPU:** EFR32MG22
- **RAM:** 32 KB
- **Flash:** 512 KB
- **Power:** CR2477 battery

## Connectivity

Zigbee Zigbee 3.0

## Compatible Firmware

- zigbee2mqtt
- zha

## Components

- **EFR32MG22** (MCU): Silicon Labs EFR32MG22 Mighty Gecko — ARM Cortex-M33 MCU with integrated Zigbee 3.0, Thread, and Bluetooth 5.0 radio, optimized for battery-powered devices — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2Fefr32mg22-datasheet.pdf&ref=openhardware.directory&product=sonoff-snzb-01p&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fseeed-studio-sonoff-snzb-01p&ref=openhardware.directory&product=sonoff-snzb-01p&source=md-export) — $12.85

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fgateway-and-sensors%2Fsnzb-01p%2F&ref=openhardware.directory&product=sonoff-snzb-01p&source=md-export)

## Tags

`zigbee`, `smart-button`, `sonoff`, `scene-switch`, `battery-powered`, `home-automation`, `smart-home`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/sonoff-snzb-01p)

---

# RFID RC522 Kit

> NXP MFRC522-based 13.56MHz RFID reader/writer kit with SPI interface, including reader module, MIFARE 1K card, and key fob. Ideal for access control and identification projects.

## Quick Facts

- **Brand:** OpenELAB
- **Board Type:** module
- **Price:** ~$4.99
- **CPU:** MFRC522 embedded contactless front-end processor (no user-programmable CPU)
- **RAM:** N/A (peripheral module)
- **Flash:** N/A (peripheral module)
- **Power:** 3.3V DC

## Components

- **MFRC522** (rfid-reader): NXP MFRC522 contactless reader/writer IC supporting MIFARE and ISO/IEC 14443A cards at 13.56MHz with SPI, I2C, and UART interfaces. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FMFRC522.pdf&ref=openhardware.directory&product=rfid-rc522-kit&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Frfid-kit-rc522&ref=openhardware.directory&product=rfid-rc522-kit&source=md-export) — $4.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Frfid-kit-rc522&ref=openhardware.directory&product=rfid-rc522-kit&source=md-export)

## Tags

`rfid`, `rc522`, `mfrc522`, `13.56mhz`, `nfc`, `spi`, `access-control`, `mifare`, `arduino`, `raspberry-pi`

---
[View full device page](https://openhardware.directory/s/1370/rfid-rc522-kit)

---

# M5Stack UnitV2 AI Camera

> Linux-based standalone AI camera with SigmaStar SSD202D dual-core Cortex-A7, GC4653 4MP sensor, 128MB RAM, WiFi, and USB-C. Runs Python and V-Training for edge AI.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** ai-camera
- **Price:** ~$75
- **CPU:** SigmaStar SSD202D
- **RAM:** 128 MB
- **Flash:** 512 MB NAND
- **USB:** USB-C
- **Power:** 5V

## Connectivity

WiFi WiFi 4

## Components

- **SigmaStar SSD202D** (SoC): SigmaStar dual-core ARM Cortex-A7 @ 1.2GHz SoC with hardware ISP, H.264/H.265 encoding, designed for smart camera applications — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flinux-chenxing.org%2Finfinity2%2FSSD202D%2F&ref=openhardware.directory&product=m5stack-unitv2-ai-camera&source=md-export)
- **GC4653** (Camera Sensor): GalaxyCore 4-megapixel (2560x1440) CMOS image sensor with high sensitivity for AI vision applications — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.galaxycore.com.cn%2Fproduct%2FGC4653&ref=openhardware.directory&product=m5stack-unitv2-ai-camera&source=md-export)
- **128MB DDR3** (RAM): 128MB DDR3 RAM integrated for Linux OS and AI model inference — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flinux-chenxing.org%2Finfinity2%2FSSD202D%2F&ref=openhardware.directory&product=m5stack-unitv2-ai-camera&source=md-export)

## Protocols

- **WiFi**
- **USB**
- **I2C**
- **Grove**
- **UART**

## Where to Buy

- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Funitv2&ref=openhardware.directory&product=m5stack-unitv2-ai-camera&source=md-export) — $75.00
- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stack-unitv2-ai-camera&ref=openhardware.directory&product=m5stack-unitv2-ai-camera&source=md-export) — $47.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Funitv2&ref=openhardware.directory&product=m5stack-unitv2-ai-camera&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5Stack_Linux_Libs&ref=openhardware.directory&product=m5stack-unitv2-ai-camera&source=md-export)

## Tags

`ai-camera`, `machine-learning`, `edge-ai`, `linux`, `computer-vision`, `cortex-a7`, `m5stack`, `object-detection`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-unitv2-ai-camera)

---

# LuckFox Omni3576

> Rockchip RK3576 octa-core edge computing SBC with 6 TOPS NPU, dual Gigabit Ethernet, WiFi 6, dual MIPI CSI camera inputs, HDMI 2.1 4K@120Hz output, and M.2 NVMe slot. Supports Debian, Ubuntu, Android 14, and Buildroot.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** sbc
- **Price:** ~$129.99
- **CPU:** ARM Cortex-A72 4x @ 2.3GHz + Cortex-A53 4x @ 2.2GHz, Mali G52 MC3 GPU, 6 TOPS NPU
- **RAM:** 4GB LPDDR4X
- **Flash:** 32GB eMMC
- **USB:** USB-C (USB 3.2 Gen 1 + DP) + USB 3.2 Gen 1 + 3x USB 2.0
- **Power:** 5V DC
- **Dimensions:** 103 × 90.5mm

## Connectivity

WiFi WiFi 6 (802.11ax) 2.4/5GHz | Bluetooth BLE 5.0 | Ethernet 2x Gigabit (1x PoE IEEE 802.3af)

## Components

- **RK3576** (soc): Rockchip RK3576 8nm SoC with 4x Cortex-A72 @ 2.3GHz + 4x Cortex-A53 @ 2.2GHz, Mali G52 MC3 GPU, 6 TOPS NPU, 4K encode/decode, dual MIPI CSI/DSI, PCIe 2.1, USB 3.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.luckfox.com%2Fwiki%2FOmni3576%2FPDF%2FRockchip_RK3576_Datasheet_V1.1-20240430.pdf&ref=openhardware.directory&product=waveshare-luckfox-omni3576&source=md-export)
- **Mali G52 MC3** (gpu): ARM Mali G52 MC3 GPU integrated in RK3576, supporting OpenGL ES 1.1/2.0/3.2, OpenCL 2.0, and Vulkan 1.1 for 2D/3D graphics acceleration. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.arm.com%2FProcessors%2FMali-G52&ref=openhardware.directory&product=waveshare-luckfox-omni3576&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0_A0 | I2C0_SDA | — | digital-input, digital-output |
| GPIO0_A1 | I2C0_SCL | — | digital-input, digital-output |
| GPIO1_A0 | UART2_TX | — | digital-input, digital-output |
| GPIO1_A1 | UART2_RX | — | digital-input, digital-output |
| GPIO1_A2 | SPI0_MOSI | — | digital-input, digital-output |
| GPIO1_A3 | SPI0_MISO | — | digital-input, digital-output |
| GPIO1_A4 | SPI0_CLK | — | digital-input, digital-output |
| GPIO1_A5 | SPI0_CS0 | — | digital-input, digital-output |
| GPIO1_B0 | UART8_TX | — | digital-input, digital-output |
| GPIO1_B1 | UART8_RX | — | digital-input, digital-output |
| GPIO1_B2 | PWM0 | — | digital-input, digital-output, pwm |
| GPIO1_B3 | PWM1 | — | digital-input, digital-output, pwm |
| GPIO1_C0 | GPIO | — | digital-input, digital-output |
| GPIO1_C1 | GPIO | — | digital-input, digital-output |
| GPIO1_C2 | GPIO | — | digital-input, digital-output |
| GPIO1_C3 | GPIO | — | digital-input, digital-output |
| GPIO1_D0 | GPIO | — | digital-input, digital-output |
| GPIO1_D1 | GPIO | — | digital-input, digital-output |
| GPIO1_D2 | GPIO | — | digital-input, digital-output |
| GPIO1_D3 | GPIO | — | digital-input, digital-output |
| GPIO2_A0 | GPIO | — | digital-input, digital-output |
| GPIO2_A1 | GPIO | — | digital-input, digital-output |
| GPIO2_A2 | GPIO | — | digital-input, digital-output |
| GPIO2_A3 | GPIO | — | digital-input, digital-output |
| GPIO2_B0 | GPIO | — | digital-input, digital-output |
| GPIO2_B1 | GPIO | — | digital-input, digital-output |
| GPIO2_B2 | GPIO | — | digital-input, digital-output |
| GPIO2_B3 | GPIO | — | digital-input, digital-output |

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-omni3576.htm&ref=openhardware.directory&product=waveshare-luckfox-omni3576&source=md-export) — 129.99
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FComputing-Development-Octa-Core-Processor-Luckfox-Omni3576-04000%2Fdp%2FB0DQQ229NS&ref=openhardware.directory&product=waveshare-luckfox-omni3576&source=md-export) — 129.99
- [LuckFox Official](https://openhardware.directory/r?to=https%3A%2F%2Fwww.luckfox.com%2FEN-Luckfox-Omni3576&ref=openhardware.directory&product=waveshare-luckfox-omni3576&source=md-export) — 129.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fluckfox-omni3576.htm&ref=openhardware.directory&product=waveshare-luckfox-omni3576&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH&ref=openhardware.directory&product=waveshare-luckfox-omni3576&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Omni3576%2FLuckfox-Omni3576-Introduction%2F&ref=openhardware.directory&product=waveshare-luckfox-omni3576&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.luckfox.com%2Fwiki%2FOmni3576%2FPDF%2FRockchip_RK3576_Datasheet_V1.1-20240430.pdf&ref=openhardware.directory&product=waveshare-luckfox-omni3576&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Omni3576%2FDownload%2F&ref=openhardware.directory&product=waveshare-luckfox-omni3576&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-luckfox-omni3576)

---

# DFRobot FireBeetle ESP8266

> Compact ESP8266 WiFi IoT microcontroller with Tensilica L106 at 80/160MHz, 16MB flash, 50KB SRAM, 10 digital I/O, onboard LiPo charging, 46uA low-power mode, OTA updates, and Arduino/MicroPython support at just $7.50.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** dev-board
- **Price:** ~$7.5
- **CPU:** Tensilica L106 single-core @ 80MHz (max 160MHz)
- **RAM:** 50KB SRAM
- **Flash:** 16MB
- **USB:** Micro-USB
- **Power:** 5V via Micro-USB or 3.7V LiPo battery
- **Dimensions:** 58 x 29mm

## Connectivity

WiFi 802.11 b/g/n

## Components

- **ESP8266** (mcu): Espressif ESP8266 with Tensilica L106 32-bit processor at 80/160MHz, 50KB SRAM, 16MB SPI flash, WiFi 802.11 b/g/n. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2F0a-esp8266ex_datasheet_en.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-esp8266&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D2 | Digital I/O | — | digital-input, digital-output, pwm |
| D3 | Digital I/O | — | digital-input, digital-output, pwm |
| D4 | Digital I/O | — | digital-input, digital-output |
| D5 | Digital I/O | — | digital-input, digital-output, pwm |
| D6 | Digital I/O | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output |
| D8 | Digital I/O | — | digital-input, digital-output |
| D9 | Digital I/O | — | digital-input, digital-output |
| D10 | Digital I/O | — | digital-input, digital-output |
| D11 | Digital I/O | — | digital-input, digital-output |
| A0 | Analog In (10-bit) | — | adc |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1634.html&ref=openhardware.directory&product=dfrobot-firebeetle-esp8266&source=md-export) — $7.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1634.html&ref=openhardware.directory&product=dfrobot-firebeetle-esp8266&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FFireBeetle_ESP8266_IOT_Microcontroller_SKU_DFR0489&ref=openhardware.directory&product=dfrobot-firebeetle-esp8266&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-firebeetle-esp8266)

---

# LuckFox Pico Pro

> Linux SBC based on Rockchip RV1106G2 with ARM Cortex-A7 @ 1.2GHz, 0.5 TOPS NPU, 128MB DDR3L, 256MB SPI NAND Flash, 100M Ethernet (RJ45), MIPI CSI camera, 26 GPIO pins, and RTC battery header in Pico form factor.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** linux-sbc
- **Price:** ~$25.99
- **CPU:** Rockchip RV1106
- **RAM:** 128MB DDR3L
- **Flash:** 256MB SPI NAND
- **GPIO:** 26 pins
- **USB:** USB-C 2.0
- **Power:** 5V

## Connectivity

Ethernet 10/100 Mbps

## Compatible Firmware

- buildroot

## Components

- **RV1106** (soc): ARM Cortex-A7 @ 1.2GHz + RISC-V MCU + 0.5 TOPS NPU + ISP 3.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.luckfox.com%2Fwiki%2FLuckfox-Pico%2FPDF%2FRockchip%2520RV1106%2520Datasheet%2520V1.7-20231218.pdf&ref=openhardware.directory&product=luckfox-pico-pro&source=md-export)
- **W25N02KV** (flash): 256MB SLC NAND Flash for boot image and rootfs storage — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.winbond.com%2Fhq%2Fproduct%2Fcode-storage-flash-memory%2Fserial-nand-flash%2F%3F__locale%3Den%26partNo%3DW25N02KV&ref=openhardware.directory&product=luckfox-pico-pro&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **PWM**
- **ADC**
- **MIPI CSI**
- **USB 2.0**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fraspberry-pi%2Fboards-kits%2Fraspberry-pi-pico-cat%2Fluckfox-pico-pro.htm&ref=openhardware.directory&product=luckfox-pico-pro&source=md-export) — $25.99

## Available Software

- [LuckFox Pico SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-pico-pro&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fraspberry-pi%2Fboards-kits%2Fraspberry-pi-pico-cat%2Fluckfox-pico-pro.htm&ref=openhardware.directory&product=luckfox-pico-pro&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-pico-pro&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Pico-Pro-Max&ref=openhardware.directory&product=luckfox-pico-pro&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.luckfox.com%2Fwiki%2FLuckfox-Pico%2FPDF%2FRockchip%2520RV1106%2520Datasheet%2520V1.7-20231218.pdf&ref=openhardware.directory&product=luckfox-pico-pro&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Pico-RV1103%2FDownloads%2F&ref=openhardware.directory&product=luckfox-pico-pro&source=md-export)

## Tags

`linux`, `sbc`, `rockchip`, `rv1106`, `arm`, `npu`, `ethernet`, `ai-camera`, `mipi-csi`, `pico-form-factor`, `nand-flash`

---
[View full device page](https://openhardware.directory/s/1370/luckfox-pico-pro)

---

# LuckFox Pico Plus

> Linux SBC based on Rockchip RV1103 with ARM Cortex-A7 @ 1.2GHz, RISC-V MCU, 0.5 TOPS NPU, 64MB DDR2, 128MB NAND Flash, 10/100M Ethernet (RJ45), MIPI CSI camera, and 25 GPIO pins in a Pico form factor.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** linux-sbc
- **Price:** ~$15.99
- **CPU:** Rockchip RV1103
- **RAM:** 64MB DDR2
- **Flash:** 128MB SPI NAND
- **GPIO:** 25 pins
- **USB:** USB-C 2.0
- **Power:** 5V

## Connectivity

Ethernet 10/100 Mbps

## Compatible Firmware

- buildroot

## Components

- **RV1103** (soc): ARM Cortex-A7 @ 1.2GHz + RISC-V MCU + 0.5 TOPS NPU + ISP 3.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.luckfox.com%2Fwiki%2FLuckfox-Pico%2FPDF%2FRockchip%2520RV1103%2520Datasheet%2520V1.1-20220427.pdf&ref=openhardware.directory&product=luckfox-pico-plus&source=md-export)
- **W25N01KV** (flash): 128MB SLC NAND Flash for boot image and rootfs storage — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.winbond.com%2Fhq%2Fproduct%2Fcode-storage-flash-memory%2Fserial-nand-flash%2F%3F__locale%3Den%26partNo%3DW25N01KV&ref=openhardware.directory&product=luckfox-pico-plus&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **PWM**
- **ADC**
- **MIPI CSI**
- **USB 2.0**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fraspberry-pi%2Fboards-kits%2Fraspberry-pi-pico-cat%2Fluckfox-pico-plus.htm&ref=openhardware.directory&product=luckfox-pico-plus&source=md-export) — $15.99

## Available Software

- [LuckFox Pico SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-pico-plus&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fraspberry-pi%2Fboards-kits%2Fraspberry-pi-pico-cat%2Fluckfox-pico-plus.htm&ref=openhardware.directory&product=luckfox-pico-plus&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-pico-plus&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Pico-Plus-Mini&ref=openhardware.directory&product=luckfox-pico-plus&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.luckfox.com%2Fwiki%2FLuckfox-Pico%2FPDF%2FRockchip%2520RV1103%2520Datasheet%2520V1.1-20220427.pdf&ref=openhardware.directory&product=luckfox-pico-plus&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Pico-RV1103%2FDownloads%2F&ref=openhardware.directory&product=luckfox-pico-plus&source=md-export)

## Tags

`linux`, `sbc`, `rockchip`, `rv1103`, `arm`, `risc-v`, `npu`, `ethernet`, `ai-camera`, `mipi-csi`, `pico-form-factor`, `nand-flash`

---
[View full device page](https://openhardware.directory/s/1370/luckfox-pico-plus)

---

# Radxa ROCK 5B+

> RK3588 Pico-ITX SBC with up to 32GB LPDDR5, dual M.2 NVMe, WiFi 6, 2.5GbE PoE, four independent display outputs, and optional 4G/5G via SIM card slot — the upgraded Rock 5B for demanding edge and NAS deployments.

## Quick Facts

- **Brand:** Radxa
- **Price:** ~$70
- **CPU:** ARM Cortex-A76 ×4 @ 2.4GHz + Cortex-A55 ×4 @ 1.8GHz
- **RAM:** 4GB / 8GB / 16GB / 24GB / 32GB LPDDR5
- **Flash:** 0–256GB onboard eMMC + 2× M.2 NVMe (PCIe 3.0 x2) + SPI flash
- **USB:** 2× USB 3.1 Gen1 Type-A, 1× USB 3.1 Type-C (DP Alt Mode), 2× USB 2.0
- **Power:** 12V DC (USB-C port is data/DP only, not power input)
- **Dimensions:** 100 × 72mm (Pico-ITX)

## Connectivity

WiFi 802.11 a/b/g/n/ac/ax (WiFi 6, RTL8852BE) | Bluetooth Bluetooth 5.2 (RTL8852BE) | Ethernet 2.5 Gbps with PoE (RTL8852BE)

## Components

- **RK3588** (soc): Rockchip RK3588: 4× Cortex-A76 @ 2.4GHz + 4× Cortex-A55 @ 1.8GHz, Mali-G610 MP4 GPU, 6 TOPS NPU, 8K H.265/VP9 decode @ 60fps. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=radxa-rock-5b-plus&source=md-export)
- **RTL8852BE** (module): Realtek RTL8852BE providing onboard WiFi 6 (802.11ax), Bluetooth 5.2, and the 2.5 Gigabit Ethernet interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.realtek.com%2Fen%2Fproducts%2Fcommunications-network-ics%2Fitem%2Frtl8852be&ref=openhardware.directory&product=radxa-rock-5b-plus&source=md-export)
- **Mali-G610** (gpu): ARM Mali-G610 MP4 supporting OpenGL ES 3.2, OpenCL 2.2, and Vulkan 1.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.arm.com%2FProcessors%2FMali-G610&ref=openhardware.directory&product=radxa-rock-5b-plus&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| Pin 3 | I2C_SDA | — | digital-input, digital-output, i2c |
| Pin 5 | I2C_SCL | — | digital-input, digital-output, i2c |
| Pin 7 | GPIO | — | digital-input, digital-output |
| Pin 8 | UART_TX | — | digital-output, uart |
| Pin 10 | UART_RX | — | digital-input, uart |
| Pin 11 | GPIO | — | digital-input, digital-output |
| Pin 12 | GPIO | — | digital-input, digital-output |
| Pin 13 | GPIO | — | digital-input, digital-output |
| Pin 15 | GPIO | — | digital-input, digital-output |
| Pin 16 | GPIO | — | digital-input, digital-output |
| Pin 18 | GPIO | — | digital-input, digital-output |
| Pin 19 | SPI_MOSI | — | digital-output, spi |
| Pin 21 | SPI_MISO | — | digital-input, spi |
| Pin 22 | GPIO | — | digital-input, digital-output |
| Pin 23 | SPI_CLK | — | digital-input, digital-output, spi |
| Pin 24 | SPI_CSn0 | — | digital-output, spi |
| Pin 26 | SPI_CSn1 | — | digital-output, spi |
| Pin 27 | I2C_SDA (alt) | — | digital-input, digital-output, i2c |
| Pin 28 | I2C_SCL (alt) | — | digital-input, digital-output, i2c |
| Pin 29 | GPIO | — | digital-input, digital-output |
| Pin 31 | GPIO | — | digital-input, digital-output |
| Pin 32 | PWM | — | digital-output, pwm |
| Pin 33 | PWM | — | digital-output, pwm |
| Pin 35 | GPIO | — | digital-input, digital-output |
| Pin 36 | GPIO | — | digital-input, digital-output |
| Pin 37 | GPIO | — | digital-input, digital-output |
| Pin 38 | GPIO | — | digital-input, digital-output |
| Pin 40 | GPIO | — | digital-input, digital-output |

## Where to Buy

- [Radxa (AliExpress)](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Frock5%2F5bp%2F&ref=openhardware.directory&product=radxa-rock-5b-plus&source=md-export) — 70.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Frock5%2F5bp%2F&ref=openhardware.directory&product=radxa-rock-5b-plus&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.radxa.com%2FRock5%2F5b&ref=openhardware.directory&product=radxa-rock-5b-plus&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=radxa-rock-5b-plus&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fradxa&ref=openhardware.directory&product=radxa-rock-5b-plus&source=md-export)

## Tags

`rk3588`, `linux`, `arm`, `sbc`, `nas`, `wifi6`, `npu`, `radxa`, `pico-itx`, `lpddr5`, `nvme`

---
[View full device page](https://openhardware.directory/s/1370/radxa-rock-5b-plus)

---

# Orange Pi 4 LTS

> The Orange Pi 4 LTS is a capable single-board computer based on the Rockchip RK3399 hexa-core SoC, featuring 4GB LPDDR4 RAM, 16GB eMMC, integrated Wi-Fi and Bluetooth, and Gigabit Ethernet — a solid long-term support platform for Linux development.

## Quick Facts

- **Brand:** Xunlong
- **Price:** ~$55
- **CPU:** Rockchip RK3399 — 2x Cortex-A72 @ 1.8GHz + 4x Cortex-A53 @ 1.4GHz
- **RAM:** 4GB LPDDR4
- **Flash:** 16GB eMMC
- **USB:** 1x USB 3.0, 2x USB 2.0, 1x USB-C
- **Power:** USB-C

## Connectivity

WiFi 802.11 b/g/n/ac | Bluetooth BLE 5.0 | Ethernet Gigabit Ethernet

## Components

- **RK3399** (soc): Hexa-core SoC with 2x Cortex-A72 + 4x Cortex-A53, Mali-T860 GPU — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK33_Series%2F2016%2F0419%2F758.html&ref=openhardware.directory&product=orange-pi-4-lts&source=md-export)

## Where to Buy

- [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fstore%2F1553371&ref=openhardware.directory&product=orange-pi-4-lts&source=md-export) — 55.00

## Links

- [product](https://openhardware.directory/r?to=http%3A%2F%2Fwww.orangepi.org%2Fhtml%2FhardWare%2FcomputerAndMicrocontrollers%2Fdetails%2FOrange-Pi-4-LTS.html&ref=openhardware.directory&product=orange-pi-4-lts&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Forange-pi-4-lts%2F&ref=openhardware.directory&product=orange-pi-4-lts&source=md-export)

## Tags

`sbc`, `linux`, `rockchip`, `rk3399`, `arm64`, `emmc`, `wifi`, `armbian`, `lts`

---
[View full device page](https://openhardware.directory/s/1370/orange-pi-4-lts)

---

# Orange Pi One

> The Orange Pi One is a compact and affordable single-board computer powered by the Allwinner H3 quad-core Cortex-A7 SoC with 512MB DDR3 RAM, offering 100Mbps Ethernet and a full Linux experience at an entry-level price point.

## Quick Facts

- **Brand:** Xunlong
- **Price:** ~$12
- **CPU:** Allwinner H3 — 4x Cortex-A7 @ 1.6GHz, Mali-400 MP2 GPU
- **RAM:** 512MB DDR3
- **Flash:** none (microSD only)
- **USB:** 1x USB 2.0 Host, 1x USB OTG
- **Power:** DC 5V/2A barrel jack

## Connectivity

Ethernet 10/100 Mbps Ethernet

## Components

- **Allwinner H3** (soc): Quad-core Cortex-A7 SoC with Mali-400 MP2 GPU, popular in affordable Linux SBCs — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flinux-sunxi.org%2FH3&ref=openhardware.directory&product=orange-pi-one&source=md-export)

## Where to Buy

- [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fstore%2F1553371&ref=openhardware.directory&product=orange-pi-one&source=md-export) — 12.00

## Links

- [product](https://openhardware.directory/r?to=http%3A%2F%2Fwww.orangepi.org%2Fhtml%2FhardWare%2FcomputerAndMicrocontrollers%2Fdetails%2FOrange-Pi-One.html&ref=openhardware.directory&product=orange-pi-one&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Forange-pi-one%2F&ref=openhardware.directory&product=orange-pi-one&source=md-export)

## Tags

`sbc`, `linux`, `allwinner`, `h3`, `arm32`, `budget`, `armbian`, `gpio`

---
[View full device page](https://openhardware.directory/s/1370/orange-pi-one)

---

# Radxa Zero 3W

> Credit-card sized Rockchip RK3566 SBC with up to 4GB LPDDR4, eMMC, microSD, WiFi 5, Bluetooth 5.0, and USB-C OTG — a compact headless Linux board with no Ethernet port.

## Quick Facts

- **Brand:** Radxa
- **Board Type:** linux-sbc
- **Price:** ~$19.99
- **CPU:** Rockchip RK3566
- **RAM:** 1GB / 2GB / 4GB LPDDR4
- **Flash:** eMMC (8GB/16GB/32GB)
- **Power:** 5V

## Connectivity

WiFi WiFi 5 (802.11ac) | Bluetooth BLE 5.0

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arace Tech](https://openhardware.directory/r?to=https%3A%2F%2Farace.tech%2Fproducts%2Fradxa-zero-3w&ref=openhardware.directory&product=radxa-zero-3&source=md-export) — $19.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Fzeros%2Fzero3w&ref=openhardware.directory&product=radxa-zero-3&source=md-export)
- [armbian](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fradxa-zero-3%2F&ref=openhardware.directory&product=radxa-zero-3&source=md-export)

## Tags

`radxa`, `zero3w`, `rk3566`, `sbc`, `linux`, `armbian`, `compact`, `wifi`, `no-ethernet`

---
[View full device page](https://openhardware.directory/s/1370/radxa-zero-3)

---

# BeaglePlay

> Versatile open-source SBC by BeagleBoard.org featuring the TI AM625 SoC, 2GB LPDDR4, 16GB eMMC, WiFi 5, Bluetooth 5.0, 802.15.4 sub-GHz radio, and Gigabit Ethernet for IoT and home automation.

## Quick Facts

- **Brand:** BeagleBoard.org
- **Board Type:** linux-sbc
- **Price:** ~$99
- **CPU:** Quad-core Cortex-A53 @ 1.4GHz + Cortex-M4F (TI AM625)
- **RAM:** 2GB LPDDR4
- **Flash:** 16GB eMMC
- **USB:** USB-C + USB 2.0 Type-A
- **Power:** 5V

## Connectivity

WiFi 802.11ac (WiFi 5) | Bluetooth BLE 5.0 | Ethernet Gigabit

## Compatible Firmware

- armbian

## Components

- **AM625** (soc): TI AM625 quad-core Cortex-A53 @ 1.4GHz with Cortex-M4F real-time core, PowerVR GPU, and PRU-ICSS subsystem. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FAM625&ref=openhardware.directory&product=beagleplay&source=md-export)

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Fbeagleboard-by-seeed-studio%2F102110762%2F17398989&ref=openhardware.directory&product=beagleplay&source=md-export) — $99.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.beagleboard.org%2Fboards%2Fbeagleplay&ref=openhardware.directory&product=beagleplay&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fbeagleplay%2F&ref=openhardware.directory&product=beagleplay&source=md-export)

## Tags

`iot`, `home-automation`, `wifi`, `bluetooth`, `802.15.4`, `ti`, `beagle`, `gateway`

---
[View full device page](https://openhardware.directory/s/1370/beagleplay)

---

# PocketBeagle 2

> Ultra-compact open-source Linux SBC by BeagleBoard.org, powered by the TI AM625 SoC with 512MB LPDDR4, USB-C OTG, and microSD — designed for deeply embedded projects where minimal size matters.

## Quick Facts

- **Brand:** BeagleBoard.org
- **Board Type:** linux-sbc
- **Price:** ~$28
- **CPU:** Quad-core Cortex-A53 @ 1.4GHz + Cortex-M4F (TI AM625)
- **RAM:** 512MB LPDDR4
- **Flash:** microSD only
- **USB:** USB-C OTG
- **Power:** 5V

## Compatible Firmware

- armbian

## Components

- **AM625** (soc): TI AM625 quad-core Cortex-A53 @ 1.4GHz with Cortex-M4F real-time core, PowerVR GPU, and PRU-ICSS subsystem. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FAM625&ref=openhardware.directory&product=pocketbeagle-2&source=md-export)

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Crowd Supply](https://openhardware.directory/r?to=https%3A%2F%2Fwww.crowdsupply.com%2Fbeagleboard-org%2Fpocketbeagle-2&ref=openhardware.directory&product=pocketbeagle-2&source=md-export) — $28.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.beagleboard.org%2Fboards%2Fpocketbeagle-2&ref=openhardware.directory&product=pocketbeagle-2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fpocketbeagle-2%2F&ref=openhardware.directory&product=pocketbeagle-2&source=md-export)

## Tags

`compact`, `embedded`, `ti`, `beagle`, `usb-otg`, `minimal`, `custom-board`

---
[View full device page](https://openhardware.directory/s/1370/pocketbeagle-2)

---

# Radxa Dragon Q6A

> Radxa Dragon Q6A — Qualcomm QCM6490 industrial SBC with 5G modem, 8GB LPDDR5, 64GB/128GB eMMC, WiFi 6E, Bluetooth 5.2, and USB-C for industrial edge computing.

## Quick Facts

- **Brand:** Radxa
- **Board Type:** linux-sbc
- **Price:** ~$59.5
- **CPU:** qualcomm-qcm6490
- **RAM:** 8GB LPDDR5
- **Flash:** 64GB/128GB eMMC
- **USB:** USB-C 3.1
- **Power:** 5V

## Connectivity

WiFi 802.11ax (WiFi 6E) | Bluetooth BLE 5.2

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Arace Tech](https://openhardware.directory/r?to=https%3A%2F%2Farace.tech%2Fproducts%2Fradxa-dragon-q6a&ref=openhardware.directory&product=radxa-dragon-q6a&source=md-export) — $59.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Fdragon%2Fq6a%2F&ref=openhardware.directory&product=radxa-dragon-q6a&source=md-export)

## Tags

`linux-sbc`, `armbian`, `qualcomm`, `qcm6490`, `5g`, `industrial`, `radxa`, `wifi6e`, `edge-computing`

---
[View full device page](https://openhardware.directory/s/1370/radxa-dragon-q6a)

---

# Netduino Plus

> The Netduino Plus is an open-source .NET Micro Framework microcontroller board with built-in Ethernet, Arduino-compatible pinout, and microSD slot — enabling C# development for connected embedded projects.

## Quick Facts

- **Brand:** Netduino
- **Board Type:** dev-board
- **Price:** ~$60
- **CPU:** 32-bit ARM Cortex-M3 (.NET Micro Framework)
- **RAM:** 60 KB
- **Flash:** 128 KB
- **Power:** 5V via Micro-USB or DC jack (7-12V)

## Connectivity

Ethernet 10/100 Mbps

## Compatible Firmware

- dotnet-micro-framework

## Components

- **STM32 (Cortex-M3)** (mcu): 32-bit ARM Cortex-M3 microcontroller running .NET Micro Framework — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fnetduino.com%2Fnetduinoplus%2Fspecs.htm&ref=openhardware.directory&product=netduino-plus&source=md-export)
- **W5100 Ethernet Controller** (ethernet-controller): Wiznet W5100 hardwired TCP/IP Ethernet controller providing 10/100 Mbps connectivity — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wiznet.io%2Fproduct-item%2Fw5100%2F&ref=openhardware.directory&product=netduino-plus&source=md-export)

## Protocols

- **I2C**: SDA=A4, SCL=A5
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, CS=D10
- **UART**: TX=D1, RX=D0
- **PWM**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | D0 | — | GPIO, UART RX |
| D1 | D1 | — | GPIO, UART TX |
| D2 | D2 | — | GPIO |
| D3 | D3 | — | GPIO, PWM |
| D4 | D4 | — | GPIO |
| D5 | D5 | — | GPIO, PWM |
| D6 | D6 | — | GPIO, PWM |
| D7 | D7 | — | GPIO |
| D8 | D8 | — | GPIO |
| D9 | D9 | — | GPIO, PWM |
| D10 | D10 | — | GPIO, SPI CS |
| D11 | D11 | — | GPIO, SPI MOSI |
| D12 | D12 | — | GPIO, SPI MISO |
| D13 | D13 | — | GPIO, SPI CLK |
| A0 | A0 | — | GPIO, ADC |
| A1 | A1 | — | GPIO, ADC |
| A2 | A2 | — | GPIO, ADC |
| A3 | A3 | — | GPIO, ADC |
| A4 | A4 | — | GPIO, ADC, I2C SDA |
| A5 | A5 | — | GPIO, ADC, I2C SCL |

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F351&ref=openhardware.directory&product=netduino-plus&source=md-export) — $60.00

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F351&ref=openhardware.directory&product=netduino-plus&source=md-export)
- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F351&ref=openhardware.directory&product=netduino-plus&source=md-export)
- [docs](https://openhardware.directory/r?to=http%3A%2F%2Fnetduino.com&ref=openhardware.directory&product=netduino-plus&source=md-export)
- [community](https://openhardware.directory/r?to=http%3A%2F%2Fforums.netduino.com%2F&ref=openhardware.directory&product=netduino-plus&source=md-export)

## Tags

`netduino`, `dotnet`, `ethernet`, `arduino-compatible`, `microcontroller`, `csharp`, `tcp-ip`

---
[View full device page](https://openhardware.directory/s/1370/netduino-plus)

---

# PIC32 Pinguino

> The PIC32 Pinguino is an open-source Arduino-form-factor development board based on the Microchip PIC32MX440F256H 32-bit processor at 80MHz, with industrial-grade power input, LiPo battery support, and UEXT expansion connector.

## Quick Facts

- **Brand:** Pinguino
- **Board Type:** dev-board
- **Price:** ~$34.95
- **CPU:** PIC32MX440F256H @ 80MHz
- **RAM:** 32 KB
- **Flash:** 256 KB
- **Power:** 9–30V DC input or USB

## Compatible Firmware

- arduino

## Components

- **PIC32MX440F256H** (mcu): Microchip PIC32MX440F256H 32-bit MIPS processor at 80MHz with 256KB flash and 32KB RAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FPIC32-PINGUINO.pdf&ref=openhardware.directory&product=pic32-pinguino&source=md-export)

## Protocols

- **I2C**: SDA=A4, SCL=A5
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, CS=D10
- **UART**: TX=D1, RX=D0
- **USB**
- **UEXT**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | D0 | — | GPIO, UART RX |
| D1 | D1 | — | GPIO, UART TX |
| D2 | D2 | — | GPIO |
| D3 | D3 | — | GPIO, PWM |
| D4 | D4 | — | GPIO |
| D5 | D5 | — | GPIO, PWM |
| D6 | D6 | — | GPIO, PWM |
| D7 | D7 | — | GPIO |
| D8 | D8 | — | GPIO |
| D9 | D9 | — | GPIO, PWM |
| D10 | D10 | — | GPIO, SPI CS |
| D11 | D11 | — | GPIO, SPI MOSI |
| D12 | D12 | — | GPIO, SPI MISO |
| D13 | D13 | — | GPIO, SPI CLK |
| A0 | A0 | — | GPIO, ADC |
| A1 | A1 | — | GPIO, ADC |
| A2 | A2 | — | GPIO, ADC |
| A3 | A3 | — | GPIO, ADC |
| A4 | A4 | — | GPIO, ADC, I2C SDA |
| A5 | A5 | — | GPIO, ADC, I2C SCL |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F469&ref=openhardware.directory&product=pic32-pinguino&source=md-export) — $34.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F469&ref=openhardware.directory&product=pic32-pinguino&source=md-export)
- [docs](https://openhardware.directory/r?to=http%3A%2F%2Fwww.pinguino.cc%2F&ref=openhardware.directory&product=pic32-pinguino&source=md-export)
- [schematics](https://openhardware.directory/r?to=http%3A%2F%2Fwww.pinguino.cc%2F&ref=openhardware.directory&product=pic32-pinguino&source=md-export)

## Tags

`pic32`, `pinguino`, `arduino-compatible`, `32-bit`, `mips`, `industrial`, `lipo-charging`

---
[View full device page](https://openhardware.directory/s/1370/pic32-pinguino)

---

# Netduino Plus 2

> The Netduino Plus 2 is an Arduino R3-compatible .NET Micro Framework development board with a 168MHz ARM Cortex-M4 processor, built-in Ethernet, microSD slot, and 12-bit ADC — offering C# programming for connected embedded applications.

## Quick Facts

- **Brand:** Netduino
- **Board Type:** dev-board
- **Price:** ~$59.95
- **CPU:** STM32F427 ARM Cortex-M4 @ 168MHz
- **RAM:** 100+ KB
- **Flash:** 384 KB
- **Power:** 5V via Micro-USB or DC jack

## Connectivity

Ethernet 10/100 Mbps

## Compatible Firmware

- dotnet-micro-framework

## Components

- **STM32F427** (mcu): ST Microelectronics STM32F427 ARM Cortex-M4F at 168MHz with FPU, 384KB flash, 100KB+ RAM — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.netduino.com%2Fnetduinoplus2%2Fspecs.htm&ref=openhardware.directory&product=netduino-plus-2&source=md-export)

## Protocols

- **I2C**: SDA=A4, SCL=A5
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, CS=D10
- **UART**: TX=D1, RX=D0
- **PWM**
- **JTAG**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | D0 | — | GPIO, UART RX |
| D1 | D1 | — | GPIO, UART TX |
| D2 | D2 | — | GPIO |
| D3 | D3 | — | GPIO, PWM |
| D4 | D4 | — | GPIO |
| D5 | D5 | — | GPIO, PWM |
| D6 | D6 | — | GPIO, PWM |
| D7 | D7 | — | GPIO |
| D8 | D8 | — | GPIO |
| D9 | D9 | — | GPIO, PWM |
| D10 | D10 | — | GPIO, SPI CS, PWM |
| D11 | D11 | — | GPIO, SPI MOSI, PWM |
| D12 | D12 | — | GPIO, SPI MISO |
| D13 | D13 | — | GPIO, SPI CLK |
| A0 | A0 | — | GPIO, ADC |
| A1 | A1 | — | GPIO, ADC |
| A2 | A2 | — | GPIO, ADC |
| A3 | A3 | — | GPIO, ADC |
| A4 | A4 | — | GPIO, ADC, I2C SDA |
| A5 | A5 | — | GPIO, ADC, I2C SCL |

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F1104&ref=openhardware.directory&product=netduino-plus-2&source=md-export) — $59.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F1104&ref=openhardware.directory&product=netduino-plus-2&source=md-export)
- [docs](https://openhardware.directory/r?to=http%3A%2F%2Fwww.netduino.com%2Fnetduinoplus2%2Fspecs.htm&ref=openhardware.directory&product=netduino-plus-2&source=md-export)
- [community](https://openhardware.directory/r?to=http%3A%2F%2Fforums.netduino.com%2F&ref=openhardware.directory&product=netduino-plus-2&source=md-export)

## Tags

`netduino`, `dotnet`, `ethernet`, `arduino-compatible`, `cortex-m4`, `csharp`, `microsd`

---
[View full device page](https://openhardware.directory/s/1370/netduino-plus-2)

---

# Netduino 3 Ethernet

> The Netduino 3 Ethernet is a .NET Micro Framework board with an STM32F427VI ARM Cortex-M4 at 168MHz, wired Ethernet with full TCP/IP stack, microSD storage, Arduino shield compatibility, and 3 GOBUS ports for C# network-connected embedded projects.

## Quick Facts

- **Brand:** Netduino
- **Board Type:** dev-board
- **Price:** ~$59.95
- **CPU:** STM32F427 ARM Cortex-M4 @ 168MHz
- **RAM:** 164+ KB
- **Flash:** 1408 KB
- **Power:** 7.5–12V DC or USB
- **Dimensions:** 80.3mm × 53.3mm × 12.7mm

## Connectivity

Ethernet 10/100 Mbps

## Compatible Firmware

- dotnet-micro-framework

## Components

- **STM32F427VI** (mcu): ST Microelectronics STM32F427VI ARM Cortex-M4F at 168MHz with FPU, 1408KB flash, 164KB+ RAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F2682%2FDM00071990.pdf&ref=openhardware.directory&product=netduino-3-ethernet&source=md-export)

## Protocols

- **I2C**: SDA=A4, SCL=A5
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, CS=D10
- **UART**: TX=D1, RX=D0
- **PWM**
- **GOBUS**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | D0 | — | GPIO, UART RX |
| D1 | D1 | — | GPIO, UART TX |
| D2 | D2 | — | GPIO |
| D3 | D3 | — | GPIO, PWM |
| D4 | D4 | — | GPIO |
| D5 | D5 | — | GPIO, PWM |
| D6 | D6 | — | GPIO, PWM |
| D7 | D7 | — | GPIO |
| D8 | D8 | — | GPIO |
| D9 | D9 | — | GPIO, PWM |
| D10 | D10 | — | GPIO, SPI CS |
| D11 | D11 | — | GPIO, SPI MOSI |
| D12 | D12 | — | GPIO, SPI MISO |
| D13 | D13 | — | GPIO, SPI CLK |
| A0 | A0 | — | GPIO, ADC |
| A1 | A1 | — | GPIO, ADC |
| A2 | A2 | — | GPIO, ADC |
| A3 | A3 | — | GPIO, ADC |
| A4 | A4 | — | GPIO, ADC, I2C SDA |
| A5 | A5 | — | GPIO, ADC, I2C SCL |

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2683&ref=openhardware.directory&product=netduino-3-ethernet&source=md-export) — $59.95

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F2683&ref=openhardware.directory&product=netduino-3-ethernet&source=md-export)
- [docs](https://openhardware.directory/r?to=http%3A%2F%2Fforums.netduino.com%2F&ref=openhardware.directory&product=netduino-3-ethernet&source=md-export)

## Tags

`netduino`, `dotnet`, `ethernet`, `arduino-compatible`, `cortex-m4`, `csharp`, `stm32`, `tcp-ip`

---
[View full device page](https://openhardware.directory/s/1370/netduino-3-ethernet)

---

# Arduino UNO Mini Limited Edition

> Miniaturised collector's Arduino UNO with ATmega328P at 16 MHz in a 34.2 × 26.7 mm form factor with USB-C, individually numbered and signed by Arduino's founders.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$45
- **CPU:** ATmega328P @ 16 MHz
- **RAM:** 2 KB SRAM
- **Flash:** 32KB
- **Power:** 5V via USB-C or 6-12V input
- **Dimensions:** 34.2 × 26.7 mm

## Compatible Firmware

- arduino

## Components

- **ATmega328P** (mcu): Microchip ATmega328P 8-bit AVR microcontroller at 16 MHz with 32 KB Flash, 2 KB SRAM, 1 KB EEPROM, 14 digital I/O, and 6 analogue inputs. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf&ref=openhardware.directory&product=arduino-uno-mini-limited-edition&source=md-export)

## Protocols

- **I2C**: SDA=A4, SCL=A5
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, SS=D10
- **UART**: TX=D1, RX=D0
- **USB**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | D0/RX | — | UART, GPIO |
| D1 | D1/TX | — | UART, GPIO |
| D2 | D2 | — | GPIO, interrupt |
| D3 | D3 | — | GPIO, PWM, interrupt |
| D4 | D4 | — | GPIO |
| D5 | D5 | — | GPIO, PWM |
| D6 | D6 | — | GPIO, PWM |
| D7 | D7 | — | GPIO |
| D8 | D8 | — | GPIO |
| D9 | D9 | — | GPIO, PWM |
| D10 | D10/SS | — | SPI, GPIO, PWM |
| D11 | D11/MOSI | — | SPI, GPIO, PWM |
| D12 | D12/MISO | — | SPI, GPIO |
| D13 | D13/SCK | — | SPI, GPIO |
| A0 | A0 | — | ADC, GPIO |
| A1 | A1 | — | ADC, GPIO |
| A2 | A2 | — | ADC, GPIO |
| A3 | A3 | — | ADC, GPIO |
| A4 | A4/SDA | — | I2C, ADC, GPIO |
| A5 | A5/SCL | — | I2C, ADC, GPIO |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5333&ref=openhardware.directory&product=arduino-uno-mini-limited-edition&source=md-export) — 45

## Available Software

- [Arduino IDE](https://openhardware.directory/r?to=https%3A%2F%2Fwww.arduino.cc%2Fen%2Fsoftware&ref=openhardware.directory&product=arduino-uno-mini-limited-edition&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5333&ref=openhardware.directory&product=arduino-uno-mini-limited-edition&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Farduino%2FArduinoCore-avr&ref=openhardware.directory&product=arduino-uno-mini-limited-edition&source=md-export)
- [manufacturer](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Farduino-uno-mini&ref=openhardware.directory&product=arduino-uno-mini-limited-edition&source=md-export)

## Tags

`arduino`, `uno`, `atmega328p`, `limited-edition`, `mini`, `usb-c`, `collector`

---
[View full device page](https://openhardware.directory/s/1370/arduino-uno-mini-limited-edition)

---

# BigTreeTech ESP8266 WiFi Module

> ESP8266-based WiFi transceiver expansion module for BTT 3D printer control boards. Available in ESP12S and ESP-07 variants, enabling wireless connectivity and remote control via serial UART.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** wireless-module
- **Price:** ~$10.25
- **CPU:** ESP8266
- **RAM:** 80KB
- **Flash:** 4MB
- **USB:** No
- **Power:** 3.3V via mainboard expansion header

## Connectivity

WiFi 802.11 b/g/n 2.4GHz

## Compatible Firmware

- Marlin
- RepRapFirmware
- Klipper

## Components

- **ESP8266 WiFi SoC** (wireless): Espressif ESP8266 single-core WiFi SoC with integrated TCP/IP stack and UART interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2F0a-esp8266ex_datasheet_en.pdf&ref=openhardware.directory&product=bigtreetech-esp8266-wifi-module&source=md-export)

## Protocols

- **UART**
- **WiFi 802.11 b/g/n**
- **TCP/IP**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-esp8266&ref=openhardware.directory&product=bigtreetech-esp8266-wifi-module&source=md-export) — $10.25

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBTT-Expansion-module&ref=openhardware.directory&product=bigtreetech-esp8266-wifi-module&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-esp8266&ref=openhardware.directory&product=bigtreetech-esp8266-wifi-module&source=md-export)

## Tags

`esp8266`, `wifi`, `wireless-module`, `3d-printer`, `serial`, `bigtreetech`, `open-source`, `expansion-module`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-esp8266-wifi-module)

---

# CompuLab IOT-GATE-IMX8PLUS

> Industrial IoT edge gateway with NXP i.MX8M Plus quad-core Cortex-A53 at 1.8GHz, up to 8GB RAM, dual Ethernet (PoE), WiFi/BT, optional 4G LTE, 3x RS485/RS232, USB 3.0, TPM, and modular I/O expansion — designed for industrial-grade edge computing.

## Quick Facts

- **Brand:** CompuLab
- **Board Type:** IoT Controller
- **Price:** ~$495
- **CPU:** ARM Cortex-A53 4x1.8GHz, NXP i.MX8M Plus, 2 TOPS NPU
- **RAM:** 2GB/4GB/8GB LPDDR4
- **Flash:** 16GB/32GB/128GB eMMC
- **USB:** USB 3.0,2x USB 2.0
- **Power:** 12V DC or PoE

## Connectivity

WiFi 802.11ac | Bluetooth Bluetooth 5.0 | Ethernet 2x Gigabit (1x PoE)

## Compatible Firmware

- arduino

## Components

- **i.MX8M-Plus** (mcu): NXP i.MX8M Plus quad-core ARM Cortex-A53 at 1.8GHz with 2 TOPS NPU, dual camera ISP, and hardware crypto. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FIMX8MPLUSCEC.pdf&ref=openhardware.directory&product=compulab-iot-gate-imx8plus&source=md-export)

## Protocols

- **RS485**: notes=Up to 3x RS485 ports
- **RS232**: notes=Up to 3x RS232 ports
- **Ethernet**: notes=2x RJ45 Gigabit
- **I2C**: notes=Via expansion

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| DI1 | Digital Input | — | digital-input |
| DI2 | Digital Input | — | digital-input |
| DO1 | Digital Output | — | digital-output |
| DO2 | Digital Output | — | digital-output |

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [CompuLab Shop](https://openhardware.directory/r?to=https%3A%2F%2Fshop.compulab.com%2Fproduct%2Fiot-gate-imx8plus-evaluation-kit%2F&ref=openhardware.directory&product=compulab-iot-gate-imx8plus&source=md-export) — $495.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.compulab.com%2Fproducts%2Fiot-gateways%2Fiot-gate-imx8plus-industrial-arm-iot-gateway%2F&ref=openhardware.directory&product=compulab-iot-gate-imx8plus&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.compulab.com%2Fwp-content%2Fuploads%2F2023%2F10%2Fiot-gate-imx8plus_reference-guide_2023-10-19.pdf&ref=openhardware.directory&product=compulab-iot-gate-imx8plus&source=md-export)

## Tags

`compulab`, `iot-gateway`, `imx8m-plus`, `industrial`, `lte`, `poe`, `rs485`, `tpm`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/compulab-iot-gate-imx8plus)

---

# BIQU AJAX TD1S

> Filament Transmission Distance (TD) and HEX color measurement tool for 3D printing. Captures true filament color and TD values for HueForge integration to build accurate filament libraries and fix color shifts in multi-color prints.

## Quick Facts

- **Brand:** BIQU
- **Board Type:** measurement-tool
- **Price:** ~$79.99
- **CPU:** Embedded measurement MCU
- **RAM:** No
- **Flash:** No
- **USB:** USB Type-C
- **Power:** 5V

## Compatible Firmware

- HueForge

## Components

- **Color Sensor** (sensor): Precision optical sensor for capturing filament true HEX color and Transmission Distance (TD) values for HueForge filament library creation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-td1s&ref=openhardware.directory&product=biqu-ajax-td1s&source=md-export)
- **Calibrated Light Source** (led): Integrated calibrated light source for accurate filament color and transmission measurements — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-td1s&ref=openhardware.directory&product=biqu-ajax-td1s&source=md-export)

## Protocols

- **USB 2.0**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-td1s&ref=openhardware.directory&product=biqu-ajax-td1s&source=md-export) — $79.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-td1s&ref=openhardware.directory&product=biqu-ajax-td1s&source=md-export)

## Tags

`filament-measurement`, `hueforge`, `multi-color-printing`, `color-sensor`, `transmission-distance`, `biqu`, `3d-printing-tools`, `ajax`

---
[View full device page](https://openhardware.directory/s/1370/biqu-ajax-td1s)

---

# Libre Computer Solitude

> Libre Computer Solitude (AML-S905D3-CC) — Amlogic S905D3 quad-core Cortex-A55 SBC with 2/4GB LPDDR4, 1.2 TOPS NPU, 4× USB 3.0, Gigabit Ethernet with PoE, and 4K HDR HDMI 2.0 in a Pi-compatible layout.

## Quick Facts

- **Brand:** Libre Computer
- **Board Type:** Single Board Computer
- **Price:** ~$45
- **CPU:** Amlogic S905D3
- **RAM:** 2GB/4GB LPDDR4
- **Flash:** MicroSD,eMMC 5.x
- **GPIO:** 40-pin pins
- **USB:** 4× USB 3.0 Type-A,USB-C 2.0 OTG
- **Power:** 5V/3A USB-C

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- Ubuntu
- Debian
- Armbian
- Mainline Linux

## Components

- **Amlogic S905D3** (SoC): Quad Cortex-A55 @ 2.016GHz with integrated 1.2 TOPS NPU — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdn.odroid.com%2FS905D3%2FODROID-C4%2FAmlogic_S905D3_Datasheet_V0.2_Provisional.pdf&ref=openhardware.directory&product=libre-computer-solitude&source=md-export)
- **Mali-G31 MP2** (GPU): OpenGL ES 3.2, Vulkan 1.1, OpenCL 2.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.arm.com%2FProcessors%2FMali-G31&ref=openhardware.directory&product=libre-computer-solitude&source=md-export)
- **Amlogic NPU** (NPU): Integrated NPU for lightweight AI/ML inference — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdn.odroid.com%2FS905D3%2FODROID-C4%2FAmlogic_S905D3_Datasheet_V0.2_Provisional.pdf&ref=openhardware.directory&product=libre-computer-solitude&source=md-export)
- **Amlogic AVE10** (Video Decoder): H.265/H.264/VP9/JPEG 4K decode — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdn.odroid.com%2FS905D3%2FODROID-C4%2FAmlogic_S905D3_Datasheet_V0.2_Provisional.pdf&ref=openhardware.directory&product=libre-computer-solitude&source=md-export)

## Protocols

- **HDMI 2.0**
- **USB 3.0**
- **USB 2.0**
- **I2C**
- **SPI**
- **UART**
- **PWM**
- **SPDIF**
- **IR**

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Libre Computer](https://openhardware.directory/r?to=https%3A%2F%2Flibre.computer%2Fproducts%2Faml-s905d3-cc%2F&ref=openhardware.directory&product=libre-computer-solitude&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flibre.computer%2Fproducts%2Faml-s905d3-cc%2F&ref=openhardware.directory&product=libre-computer-solitude&source=md-export)

## Tags

`sbc`, `single-board-computer`, `amlogic`, `s905d3`, `npu`, `ai`, `4k`, `hdr`, `poe`, `arm`, `cortex-a55`, `raspberry-pi-compatible`, `libre-computer`

---
[View full device page](https://openhardware.directory/s/1370/libre-computer-solitude)

---

# LILYGO T-Radar

> LILYGO T-Radar is a radar sensor expansion module based on the Acconeer A121 pulsed coherent radar, designed for presence detection and distance measurement with LILYGO motherboards.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** sensor-module
- **Price:** ~$15.43
- **CPU:** Acconeer A121 (60GHz pulsed coherent radar)
- **Flash:** N/A (sensor module)
- **Power:** 3.3V

## Components

- **A121** (radar-sensor): Acconeer A121 pulsed coherent radar chip at 60 GHz, supports presence detection, distance measurement, and motion sensing over SPI — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.acconeer.com%2Fen%2Flatest%2Fdetectors%2Fa121%2Findex.html&ref=openhardware.directory&product=lilygo-t-radar&source=md-export)

## Protocols

- **SPI**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-radar&ref=openhardware.directory&product=lilygo-t-radar&source=md-export) — $15.43

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-radar&ref=openhardware.directory&product=lilygo-t-radar&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Radar&ref=openhardware.directory&product=lilygo-t-radar&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.acconeer.com%2Fen%2Flatest%2Fdetectors%2Fa121%2Findex.html&ref=openhardware.directory&product=lilygo-t-radar&source=md-export)

## Tags

`radar`, `acconeer`, `a121`, `presence-detection`, `60ghz`, `sensor-module`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-radar)

---

# Raspberry Pi Pico W

> Wireless microcontroller board featuring the RP2040 dual-core Cortex-M0+ processor with built-in WiFi 4 and Bluetooth 5.2 (BLE). Supports MicroPython, CircuitPython, and C/C++ development.

## Quick Facts

- **Brand:** Raspberry Pi
- **Board Type:** dev-board
- **Price:** ~$6
- **CPU:** RP2040
- **RAM:** 264 KB
- **Flash:** 2 MB
- **GPIO:** 26 pins
- **USB:** Micro-B
- **Power:** 5V

## Connectivity

WiFi WiFi 4 (2.4 GHz) | Bluetooth BLE 5.2

## Compatible Firmware

- micropython
- circuitpython
- arduino
- C/C++ SDK

## Components

- **RP2040** (Processor): Raspberry Pi's custom dual-core ARM Cortex-M0+ microcontroller running at up to 133 MHz with 264 KB SRAM and programmable I/O. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=raspberry-pi-pico-w&source=md-export)
- **Infineon CYW43439** (Wireless): Single-chip IEEE 802.11b/g/n WiFi and Bluetooth 5.2 combo device providing wireless connectivity for the Pico W. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.infineon.com%2Fdgdl%2FInfineon-CYW43439-DataSheet-v03_00-EN.pdf&ref=openhardware.directory&product=raspberry-pi-pico-w&source=md-export)

## Protocols

- **I2C**: SDA=GPIO4, SCL=GPIO5
- **SPI**: MOSI=GPIO19, MISO=GPIO16, SCK=GPIO18, CS=GPIO17
- **UART**: TX=GPIO0, RX=GPIO1
- **PWM**
- **ADC**: ADC0=GPIO26, ADC1=GPIO27, ADC2=GPIO28
- **PIO**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | UART0_TX — UART Transmit | — | uart, digital-input, digital-output, pwm |
| GPIO1 | UART0_RX — UART Receive | — | uart, digital-input, digital-output, pwm |
| GPIO2 | GPIO2 — General Purpose | — | digital-input, digital-output, pwm |
| GPIO3 | GPIO3 — General Purpose | — | digital-input, digital-output, pwm |
| GPIO4 | SDA — I2C0 Data | — | i2c, digital-input, digital-output, pwm |
| GPIO5 | SCL — I2C0 Clock | — | i2c, digital-input, digital-output, pwm |
| GPIO6 | GPIO6 — General Purpose | — | digital-input, digital-output, pwm |
| GPIO7 | GPIO7 — General Purpose | — | digital-input, digital-output, pwm |
| GPIO8 | UART1_TX — UART1 Transmit | — | uart, digital-input, digital-output, pwm |
| GPIO9 | UART1_RX — UART1 Receive | — | uart, digital-input, digital-output, pwm |
| GPIO10 | GPIO10 — General Purpose | — | digital-input, digital-output, pwm |
| GPIO11 | GPIO11 — General Purpose | — | digital-input, digital-output, pwm |
| GPIO12 | SPI1_RX — SPI1 MISO | — | spi, digital-input, digital-output, pwm |
| GPIO13 | GPIO13 — General Purpose | — | digital-input, digital-output, pwm |
| GPIO14 | SPI1_SCK — SPI1 Clock | — | spi, digital-input, digital-output, pwm |
| GPIO15 | SPI1_TX — SPI1 MOSI | — | spi, digital-input, digital-output, pwm |
| GPIO16 | SPI0_RX — SPI0 MISO | — | spi, digital-input, digital-output, pwm |
| GPIO17 | SPI0_CS — SPI0 Chip Select | — | spi, digital-input, digital-output, pwm |
| GPIO18 | SPI0_SCK — SPI0 Clock | — | spi, digital-input, digital-output, pwm |
| GPIO19 | SPI0_TX — SPI0 MOSI | — | spi, digital-input, digital-output, pwm |
| GPIO20 | I2C0_SDA — I2C0 Data (alt) | — | i2c, digital-input, digital-output, pwm |
| GPIO21 | I2C0_SCL — I2C0 Clock (alt) | — | i2c, digital-input, digital-output, pwm |
| GPIO22 | GPIO22 — General Purpose | — | digital-input, digital-output, pwm |
| GPIO26 | ADC0 — Analog Input 0 | — | adc, digital-input, digital-output |
| GPIO27 | ADC1 — Analog Input 1 | — | adc, digital-input, digital-output |
| GPIO28 | ADC2 — Analog Input 2 | — | adc, digital-input, digital-output |
| GPIO29 | ADC3 — VSYS Monitor (internal) | — | adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fraspberry-pi-pico-w-wireless-rp2040-mcu-board&ref=openhardware.directory&product=raspberry-pi-pico-w&source=md-export) — $6.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.raspberrypi.com%2Fproducts%2Fraspberry-pi-pico%2F&ref=openhardware.directory&product=raspberry-pi-pico-w&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Fpicow%2Fpico-w-datasheet.pdf&ref=openhardware.directory&product=raspberry-pi-pico-w&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fraspberrypi%2Fpico-sdk&ref=openhardware.directory&product=raspberry-pi-pico-w&source=md-export)

## Tags

`rp2040`, `wifi`, `bluetooth`, `micropython`, `circuitpython`, `iot`, `microcontroller`

---
[View full device page](https://openhardware.directory/s/1370/raspberry-pi-pico-w)

---

# Blue Pill STM32F103C8T6

> Popular low-cost development board based on the STM32F103C8T6 ARM Cortex-M3 microcontroller running at 72 MHz. Features 64 KB flash, 20 KB SRAM, and extensive peripheral support for embedded development.

## Quick Facts

- **Brand:** Generic
- **Board Type:** dev-board
- **Price:** ~$2.5
- **CPU:** STM32F103C8T6
- **RAM:** 20 KB
- **Flash:** 64 KB
- **GPIO:** 37 pins
- **USB:** Micro-B
- **Power:** 5V

## Compatible Firmware

- arduino
- STM32CubeIDE
- PlatformIO
- micropython
- Rust
- Zephyr RTOS

## Components

- **STM32F103C8T6** (Processor): STMicroelectronics 32-bit ARM Cortex-M3 MCU running at 72 MHz with 64 KB flash, 20 KB SRAM, and rich peripheral set including CAN, USB, and multiple timers. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32f103c8.pdf&ref=openhardware.directory&product=blue-pill-stm32&source=md-export)
- **8 MHz Crystal** (Crystal): External 8 MHz crystal oscillator providing the main clock source, multiplied by PLL to achieve the 72 MHz system clock. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32f103c8.pdf&ref=openhardware.directory&product=blue-pill-stm32&source=md-export)
- **32.768 kHz Crystal** (Crystal): Low-speed external crystal for the real-time clock (RTC) peripheral, enabling accurate timekeeping in low-power modes. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32f103c8.pdf&ref=openhardware.directory&product=blue-pill-stm32&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **CAN**
- **PWM**
- **ADC**
- **SWD**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fbluepilldevelopmentboard&ref=openhardware.directory&product=blue-pill-stm32&source=md-export) — $2.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fen%2Fmicrocontrollers-microprocessors%2Fstm32f103c8.html&ref=openhardware.directory&product=blue-pill-stm32&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32f103c8.pdf&ref=openhardware.directory&product=blue-pill-stm32&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fstm32duino%2FArduino_Core_STM32&ref=openhardware.directory&product=blue-pill-stm32&source=md-export)

## Tags

`stm32`, `arm`, `cortex-m3`, `microcontroller`, `arduino`, `embedded`, `swd`

---
[View full device page](https://openhardware.directory/s/1370/blue-pill-stm32)

---

# A4988 Stepper Motor Driver Module

> Allegro A4988-based stepper motor driver module with microstepping up to 1/16 step, handling up to 2A per coil. Includes heatsink. Essential for 3D printers, CNC machines, and precision robotics.

## Quick Facts

- **Brand:** OpenELAB
- **Board Type:** module
- **Price:** ~$4.95
- **CPU:** N/A (motor driver module)
- **RAM:** N/A
- **Flash:** N/A
- **Power:** 8-35V motor supply, 3.3-5V logic

## Components

- **Allegro A4988** (Motor Driver): DMOS microstepping driver with translator, capable of driving bipolar stepper motors in full, half, quarter, eighth, and sixteenth step modes with up to 2A output current per coil — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.allegromicro.com%2F%7E%2Fmedia%2FFiles%2FDatasheets%2FA4988-Datasheet.ashx&ref=openhardware.directory&product=a4988-stepper-motor-driver&source=md-export)

## Protocols

- **Step/Dir**

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fa4988stepmotordrivermodule&ref=openhardware.directory&product=a4988-stepper-motor-driver&source=md-export) — $4.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fa4988stepmotordrivermodule&ref=openhardware.directory&product=a4988-stepper-motor-driver&source=md-export)

## Tags

`stepper-motor`, `motor-driver`, `cnc`, `3d-printing`, `a4988`

---
[View full device page](https://openhardware.directory/s/1370/a4988-stepper-motor-driver)

---

# ChameleonUltra

> Open-source NFC/RFID multi-tool built on the nRF52840 SoC. Reads, writes, cracks, and emulates 13.56MHz and 125kHz cards in a compact key-fob form factor with BLE 5.0 connectivity.

## Quick Facts

- **Brand:** Dim6 Tech
- **Board Type:** nfc-rfid-tool
- **Price:** ~$39.9
- **CPU:** nRF52840
- **RAM:** 256KB SRAM
- **Flash:** 1MB
- **USB:** USB-C 2.0
- **Power:** 5V USB-C / 3.7V LiPo

## Connectivity

Bluetooth BLE 5.0

## Compatible Firmware

- chameleon-ultra-firmware

## Components

- **nRF52840** (mcu): ARM Cortex-M4F BLE 5.0 SoC @ 64MHz with 256KB RAM and 1MB Flash — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nordicsemi.com%2FProducts%2FnRF52840&ref=openhardware.directory&product=chameleon-ultra&source=md-export)
- **MFRC522** (nfc): 13.56MHz NFC/RFID reader/writer IC with MIFARE crypto support — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FMFRC522.pdf&ref=openhardware.directory&product=chameleon-ultra&source=md-export)

## Protocols

- **SPI**
- **USB**
- **BLE**
- **ISO 14443A**
- **EM4100**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** GPL-3.0

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fdim6%2Fchameleonultra-nfcrfid-readerwritersimulator%2F&ref=openhardware.directory&product=chameleon-ultra&source=md-export) — $39.90
- [Lab401](https://openhardware.directory/r?to=https%3A%2F%2Flab401.com%2Fproducts%2Fchameleon-ultra&ref=openhardware.directory&product=chameleon-ultra&source=md-export) — $69.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fdim6%2Fchameleonultra-nfcrfid-readerwritersimulator%2F&ref=openhardware.directory&product=chameleon-ultra&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FRfidResearchGroup%2FChameleonUltra&ref=openhardware.directory&product=chameleon-ultra&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FRfidResearchGroup%2FChameleonUltra%2Fwiki&ref=openhardware.directory&product=chameleon-ultra&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fraw.githubusercontent.com%2FRfidResearchGroup%2FChameleonUltra%2Fmain%2Fhardware%2Fultra%2FChameleon_nrf52_ultra_V1.0.pdf&ref=openhardware.directory&product=chameleon-ultra&source=md-export)

## Tags

`nfc`, `rfid`, `nrf52840`, `ble`, `security`, `penetration-testing`, `mifare`, `hid`, `em4100`, `card-emulation`

---
[View full device page](https://openhardware.directory/s/1370/chameleon-ultra)

---

# Waveshare RP2350B-Plus-W

> Compact Pico-form-factor development board featuring the Raspberry Pi RP2350B dual-architecture MCU with WiFi and Bluetooth 5.2 via the Raspberry Pi Radio Module 2, 16MB flash, 26 GPIO pins, and USB-C connectivity.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$10.99
- **CPU:** ARM Cortex-M33 / RISC-V Hazard3 dual-core @ 150MHz, FPU, DSP, TrustZone, 12 PIO state machines
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **USB:** USB-C (USB 1.1 host/device)
- **Power:** 5V
- **Dimensions:** 51 × 21mm

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 5.2

## Components

- **RP2350B** (mcu): Raspberry Pi RP2350B dual-core microcontroller with switchable ARM Cortex-M33 and Hazard3 RISC-V cores at 150MHz, 520KB SRAM, 48 GPIO, 12 PIO state machines, and hardware security features including TrustZone and secure boot. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2350b-plus-w&source=md-export)
- **CYW43439** (wifi-bluetooth-module): Infineon AIROC CYW43439 combo chip inside the Raspberry Pi Radio Module 2, providing single-band 2.4GHz WiFi 4 (802.11 b/g/n) and Bluetooth 5.2 with integrated PA, LNA, and TR switch. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.infineon.com%2Fpart%2FCYW43439&ref=openhardware.directory&product=waveshare-rp2350b-plus-w&source=md-export)
- **ME6217C33M5G** (voltage-regulator): Microne ME6217C33M5G low dropout regulator providing stable 3.3V output with up to 800mA current for powering the RP2350B and peripherals. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.lcsc.com%2Fdatasheet%2Flcsc_datasheet_1912111437_MICRONE-Nanjing-Micro-One-Elec-ME6217C33M5G_C427602.pdf&ref=openhardware.directory&product=waveshare-rp2350b-plus-w&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GP0 | UART0 TX / I2C0 SDA / SPI0 RX | — | digital-input, digital-output, pwm |
| GP1 | UART0 RX / I2C0 SCL / SPI0 CSn | — | digital-input, digital-output, pwm |
| GP2 | I2C1 SDA / SPI0 SCK | — | digital-input, digital-output, pwm |
| GP3 | I2C1 SCL / SPI0 TX | — | digital-input, digital-output, pwm |
| GP4 | UART1 TX / I2C0 SDA / SPI0 RX | — | digital-input, digital-output, pwm |
| GP5 | UART1 RX / I2C0 SCL / SPI0 CSn | — | digital-input, digital-output, pwm |
| GP6 | General GPIO | — | digital-input, digital-output, pwm |
| GP7 | General GPIO | — | digital-input, digital-output, pwm |
| GP8 | General GPIO | — | digital-input, digital-output, pwm |
| GP9 | General GPIO | — | digital-input, digital-output, pwm |
| GP10 | SPI1 SCK | — | digital-input, digital-output, pwm |
| GP11 | SPI1 TX | — | digital-input, digital-output, pwm |
| GP12 | SPI1 RX | — | digital-input, digital-output, pwm |
| GP13 | SPI1 CSn | — | digital-input, digital-output, pwm |
| GP14 | General GPIO | — | digital-input, digital-output, pwm |
| GP15 | General GPIO | — | digital-input, digital-output, pwm |
| GP16 | General GPIO | — | digital-input, digital-output, pwm |
| GP17 | General GPIO | — | digital-input, digital-output, pwm |
| GP18 | General GPIO | — | digital-input, digital-output, pwm |
| GP19 | General GPIO | — | digital-input, digital-output, pwm |
| GP20 | General GPIO | — | digital-input, digital-output, pwm |
| GP21 | General GPIO | — | digital-input, digital-output, pwm |
| GP22 | General GPIO | — | digital-input, digital-output, pwm |
| GP40 | ADC0 | — | digital-input, digital-output, adc |
| GP41 | ADC1 | — | digital-input, digital-output, adc |
| GP42 | ADC2 | — | digital-input, digital-output, adc |

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2350b-plus-w.htm&ref=openhardware.directory&product=waveshare-rp2350b-plus-w&source=md-export) — 10.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2350b-plus-w.htm&ref=openhardware.directory&product=waveshare-rp2350b-plus-w&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRP2350B-Plus-W&ref=openhardware.directory&product=waveshare-rp2350b-plus-w&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2350b-plus-w&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FRP2350B-Plus-W%2FRP2350B-Plus-W.pdf&ref=openhardware.directory&product=waveshare-rp2350b-plus-w&source=md-export)

## Certifications

FCC, CE

---
[View full device page](https://openhardware.directory/s/1370/waveshare-rp2350b-plus-w)

---

# Waveshare RP2040-PiZero

> A Raspberry Pi Zero form-factor development board based on the RP2040 dual-core Cortex-M0+ MCU with 16MB flash, Mini HDMI (DVI) output via PIO bitbanging, USB-C, PIO-USB host port, microSD card slot, LiPo battery charging, and a 40-pin Raspberry Pi-compatible GPIO header.

## Quick Facts

- **Brand:** Waveshare
- **Price:** ~$9.99
- **CPU:** ARM Cortex-M0+ dual-core @ 133MHz
- **RAM:** 264KB SRAM
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + LiPo

## Components

- **RP2040** (mcu): Raspberry Pi RP2040 dual-core ARM Cortex-M0+ processor at 133MHz with 264KB SRAM, 8 PIO state machines, and USB 1.1 support. PIO enables bitbanged DVI output and USB host functionality. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2040-pizero&source=md-export)
- **W25Q128JV** (flash-memory): Winbond 16MB (128Mbit) serial NOR flash memory with QSPI interface for firmware and data storage. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.winbond.com%2Fresource-files%2Fw25q128jv%2520spi%2520revc%252011162016.pdf&ref=openhardware.directory&product=waveshare-rp2040-pizero&source=md-export)

## Protocols

- **DVI** (PIO DVI (Mini HDMI)): D2+=GPIO16, D2-=GPIO17, D1+=GPIO18, D1-=GPIO19, D0+=GPIO20, D0-=GPIO21, CLK+=GPIO14, CLK-=GPIO15
- **SPI** (SPI0 (SD Card)): SCK=GPIO6, MOSI=GPIO7, MISO=GPIO4, CS=GPIO5
- **UART** (UART0): TX=GPIO0, RX=GPIO1
- **I2C** (I2C1): SDA=GPIO2, SCL=GPIO3

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | UART0 TX | — | digital-input, digital-output, pwm |
| GPIO1 | UART0 RX | — | digital-input, digital-output, pwm |
| GPIO2 | I2C1 SDA | — | digital-input, digital-output, pwm |
| GPIO3 | I2C1 SCL | — | digital-input, digital-output, pwm |
| GPIO4 | SPI0 MISO (SD) | — | digital-input, digital-output, pwm |
| GPIO5 | SPI0 CS (SD) | — | digital-input, digital-output, pwm |
| GPIO6 | SPI0 SCK (SD) | — | digital-input, digital-output, pwm |
| GPIO7 | SPI0 MOSI (SD) | — | digital-input, digital-output, pwm |
| GPIO8 | GPIO / PIO-USB D+ | — | digital-input, digital-output, pwm |
| GPIO9 | GPIO / PIO-USB D- | — | digital-input, digital-output, pwm |
| GPIO10 | GPIO | — | digital-input, digital-output, pwm |
| GPIO11 | GPIO | — | digital-input, digital-output, pwm |
| GPIO12 | GPIO | — | digital-input, digital-output, pwm |
| GPIO13 | GPIO | — | digital-input, digital-output, pwm |
| GPIO14 | DVI CLK+ | — | digital-input, digital-output, pwm |
| GPIO15 | DVI CLK- | — | digital-input, digital-output, pwm |
| GPIO16 | DVI D2+ | — | digital-input, digital-output, pwm |
| GPIO17 | DVI D2- | — | digital-input, digital-output, pwm |
| GPIO18 | DVI D1+ | — | digital-input, digital-output, pwm |
| GPIO19 | DVI D1- | — | digital-input, digital-output, pwm |
| GPIO20 | DVI D0+ | — | digital-input, digital-output, pwm |
| GPIO21 | DVI D0- | — | digital-input, digital-output, pwm |
| GPIO22 | GPIO | — | digital-input, digital-output, pwm |
| GPIO23 | GPIO | — | digital-input, digital-output, pwm |
| GPIO24 | VBUS Detect | — | digital-input |
| GPIO25 | LED | — | digital-input, digital-output, pwm |
| GPIO26 | ADC0 | — | digital-input, digital-output, pwm, adc |
| GPIO27 | ADC1 | — | digital-input, digital-output, pwm, adc |
| GPIO28 | ADC2 | — | digital-input, digital-output, pwm, adc |
| GPIO29 | ADC3 (VSYS/3) | — | digital-input, adc |

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2040-pizero.htm&ref=openhardware.directory&product=waveshare-rp2040-pizero&source=md-export) — 9.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2040-pizero.htm&ref=openhardware.directory&product=waveshare-rp2040-pizero&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fraspberrypi%2Fpico-examples&ref=openhardware.directory&product=waveshare-rp2040-pizero&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRP2040-PiZero&ref=openhardware.directory&product=waveshare-rp2040-pizero&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2040-pizero&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FRP2040-PiZero%2FRP2040-PiZero-Schematic.pdf&ref=openhardware.directory&product=waveshare-rp2040-pizero&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-rp2040-pizero)

---

# FriendlyElec NanoPi M5

> Compact 90×62mm RK3576 SBC with up to 16GB LPDDR5, dual Gigabit Ethernet, UFS 2.0 storage, M.2 NVMe, 6 TOPS NPU, and USB-C PD — FriendlyElec's octa-core edge AI developer board.

## Quick Facts

- **Brand:** FriendlyElec
- **Price:** ~$65
- **CPU:** ARM Cortex-A72 ×4 @ 2.2GHz + Cortex-A53 ×4 @ 1.8GHz
- **RAM:** 4GB LPDDR4X / 8GB or 16GB LPDDR5
- **Flash:** UFS 2.0 (optional) + 16MB SPI NOR + M.2 NVMe (PCIe)
- **USB:** 2× USB 3.2 Gen1 Type-A, 1× USB-C (PD 6–20V)
- **Power:** USB-C PD 6–20V
- **Dimensions:** 90 × 62 × 1.6mm

## Connectivity

Ethernet 2× Gigabit Ethernet

## Components

- **RK3576** (soc): Rockchip RK3576: 4× Cortex-A72 @ 2.2GHz + 4× Cortex-A53 @ 1.8GHz, Mali-G52 MC3 GPU, 6 TOPS NPU (INT4/8/16/FP16), 8K@30fps H.265/VP9 decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2024%2F0322%2F1299.html&ref=openhardware.directory&product=friendlyelec-nanopi-m5&source=md-export)
- **Mali-G52 MC3** (gpu): ARM Mali-G52 MC3 GPU supporting OpenGL ES 1.1/2.0/3.2, Vulkan 1.2, and OpenCL 2.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.arm.com%2FProcessors%2FMali-G52&ref=openhardware.directory&product=friendlyelec-nanopi-m5&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| Pin 3 | I2C0_SDA | — | digital-input, digital-output, i2c |
| Pin 5 | I2C0_SCL | — | digital-input, digital-output, i2c |
| Pin 8 | UART_TX | — | digital-output, uart |
| Pin 10 | UART_RX | — | digital-input, uart |
| Pin 11 | GPIO | — | digital-input, digital-output |
| Pin 13 | GPIO | — | digital-input, digital-output |
| Pin 15 | GPIO | — | digital-input, digital-output |
| Pin 16 | GPIO | — | digital-input, digital-output |
| Pin 18 | SPI_CLK | — | digital-output, spi |
| Pin 19 | SPI_MOSI | — | digital-output, spi |
| Pin 21 | SPI_MISO | — | digital-input, spi |
| Pin 22 | GPIO | — | digital-input, digital-output |
| Pin 24 | SPI_CSn | — | digital-output, spi |
| Pin 27 | I2C1_SDA | — | digital-input, digital-output, i2c |
| Pin 28 | I2C1_SCL | — | digital-input, digital-output, i2c |
| Pin 29 | GPIO | — | digital-input, digital-output |
| Pin 30 | GPIO | — | digital-input, digital-output |
| Pin 32 | PWM | — | digital-output, pwm |
| Pin 33 | PWM | — | digital-output, pwm |
| Pin 35 | I2S_SDI | — | digital-input, i2s |

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D309&ref=openhardware.directory&product=friendlyelec-nanopi-m5&source=md-export) — 65.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D309&ref=openhardware.directory&product=friendlyelec-nanopi-m5&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_M5&ref=openhardware.directory&product=friendlyelec-nanopi-m5&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2024%2F0322%2F1299.html&ref=openhardware.directory&product=friendlyelec-nanopi-m5&source=md-export)

## Tags

`rk3576`, `linux`, `arm`, `sbc`, `npu`, `friendlyelec`, `rockchip`, `edge-ai`, `lpddr5`

---
[View full device page](https://openhardware.directory/s/1370/friendlyelec-nanopi-m5)

---

# FriendlyElec NanoPi R3S LTS

> Compact 57×57mm dual-GbE router board with RK3566 quad-core Cortex-A55, up to 2GB RAM, 32GB eMMC, HDMI, and USB-C power — the long-term-support mini network appliance from FriendlyElec.

## Quick Facts

- **Brand:** FriendlyElec
- **Price:** ~$35
- **CPU:** ARM Cortex-A55 ×4 @ 1.8GHz
- **RAM:** 1GB / 2GB LPDDR4X
- **Flash:** 32GB eMMC (optional)
- **USB:** 1× USB 3.0 Type-A
- **Power:** USB-C 5V/2A
- **Dimensions:** 57 × 57 × 1.6mm

## Connectivity

Ethernet 1× Native GbE + 1× PCIe GbE (dual Gigabit)

## Components

- **RK3566** (soc): Rockchip RK3566 quad-core Cortex-A55 @ 1.8GHz with Mali-G52 2EE GPU, PCIe 2.1, and HDMI 2.0. Efficient mid-range SoC for compact Linux router and IoT gateway applications. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK33_Series%2F2021%2F0113%2F1194.html&ref=openhardware.directory&product=friendlyelec-nanopi-r3s-lts&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| MIPI-DSI Pin 1 | GPIO | — | digital-input, digital-output |
| MIPI-DSI Pin 3 | I2C_SDA | — | digital-input, digital-output, i2c |
| MIPI-DSI Pin 5 | I2C_SCL | — | digital-input, digital-output, i2c |
| MIPI-DSI Pin 7 | PWM | — | digital-output, pwm |
| MIPI-DSI Pin 9 | GPIO | — | digital-input, digital-output |
| MIPI-DSI Pin 11 | GPIO | — | digital-input, digital-output |

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2FNanoPi-R3S-p-1687.html&ref=openhardware.directory&product=friendlyelec-nanopi-r3s-lts&source=md-export) — 35.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2FNanoPi-R3S-p-1687.html&ref=openhardware.directory&product=friendlyelec-nanopi-r3s-lts&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_R3S&ref=openhardware.directory&product=friendlyelec-nanopi-r3s-lts&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK33_Series%2F2021%2F0113%2F1194.html&ref=openhardware.directory&product=friendlyelec-nanopi-r3s-lts&source=md-export)

## Tags

`rk3566`, `linux`, `arm`, `sbc`, `router`, `openwrt`, `friendlyelec`, `rockchip`, `network`, `lts`

---
[View full device page](https://openhardware.directory/s/1370/friendlyelec-nanopi-r3s-lts)

---

# Muse Pi Pro

> Raspberry Pi-sized RISC-V SBC with SpacemiT K1 octa-core @ 1.8GHz, 2 TOPS NPU, WiFi 6, Gigabit Ethernet, M.2 NVMe, mPCIe for 4G/5G, and a 40-pin GPIO header — a full-featured RISC-V Linux developer board.

## Quick Facts

- **Brand:** Muse
- **Price:** ~$122.42
- **CPU:** RISC-V X60 ×8 @ 1.8GHz
- **RAM:** 8GB / 16GB LPDDR4X
- **Flash:** 64GB / 128GB eMMC 5.1 + M.2 NVMe (M-Key 2230)
- **USB:** 4× USB 3.0 Type-A
- **Power:** USB-C
- **Dimensions:** 85 × 56mm

## Connectivity

WiFi 802.11 a/b/g/n/ac/ax (WiFi 6) | Bluetooth Bluetooth 5.3 | Ethernet Gigabit Ethernet

## Components

- **SpacemiT-K1** (soc): SpacemiT K1 (M1): 8× RISC-V X60 @ 1.8GHz, Imagination IMG BXE-2-32 GPU (Vulkan 1.2, OpenCL 3.0), 2 TOPS NPU (INT8), 1080p60 H.265/H.264 encode/decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.spacemit.com%2Fkey-stone-k1%2F&ref=openhardware.directory&product=muse-pi-pro&source=md-export)
- **IMG BXE-2-32** (gpu): Imagination Technologies IMG BXE-2-32 GPU with Vulkan 1.2, OpenGL ES 3.2, and OpenCL 3.0 support, delivering 20 GFLOPS (FP32). — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.imaginationtech.com%2Fproduct%2Fimg-bxe%2F&ref=openhardware.directory&product=muse-pi-pro&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| Pin 3 | I2C_SDA | — | digital-input, digital-output, i2c |
| Pin 5 | I2C_SCL | — | digital-input, digital-output, i2c |
| Pin 7 | GPIO | — | digital-input, digital-output |
| Pin 8 | UART_TX | — | digital-output, uart |
| Pin 10 | UART_RX | — | digital-input, uart |
| Pin 11 | GPIO | — | digital-input, digital-output |
| Pin 13 | GPIO | — | digital-input, digital-output |
| Pin 15 | GPIO | — | digital-input, digital-output |
| Pin 16 | GPIO | — | digital-input, digital-output |
| Pin 18 | GPIO | — | digital-input, digital-output |
| Pin 19 | SPI_MOSI | — | digital-output, spi |
| Pin 21 | SPI_MISO | — | digital-input, spi |
| Pin 22 | GPIO | — | digital-input, digital-output |
| Pin 23 | SPI_CLK | — | digital-output, spi |
| Pin 24 | SPI_CSn | — | digital-output, spi |
| Pin 27 | I2C_SDA (alt) | — | digital-input, digital-output, i2c |
| Pin 28 | I2C_SCL (alt) | — | digital-input, digital-output, i2c |
| Pin 29 | GPIO | — | digital-input, digital-output |
| Pin 31 | GPIO | — | digital-input, digital-output |
| Pin 32 | PWM | — | digital-output, pwm |
| Pin 33 | PWM | — | digital-output, pwm |
| Pin 35 | GPIO | — | digital-input, digital-output |
| Pin 36 | GPIO | — | digital-input, digital-output |
| Pin 37 | GPIO | — | digital-input, digital-output |
| Pin 38 | GPIO | — | digital-input, digital-output |
| Pin 40 | GPIO | — | digital-input, digital-output |

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.spacemit.com%2Fmuse-pi-pro&ref=openhardware.directory&product=muse-pi-pro&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.banana-pi.org%2Fen%2FBPI-F3%2FSpacemiT_K1&ref=openhardware.directory&product=muse-pi-pro&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.spacemit.com%2Fkey-stone-k1%2F&ref=openhardware.directory&product=muse-pi-pro&source=md-export)

## Tags

`risc-v`, `spacemit`, `k1`, `linux`, `sbc`, `npu`, `wifi6`, `edge-ai`, `open-isa`, `riscv`

---
[View full device page](https://openhardware.directory/s/1370/muse-pi-pro)

---

# Radxa ROCK 5T

> 110×80mm RK3588 SBC with dual 2.5GbE, dual M.2 NVMe, WiFi 6, four independent display outputs, HDMI input, 4G/5G SIM slot, and up to 32GB LPDDR5 — the ROCK 5 ITX feature set in a standard SBC footprint.

## Quick Facts

- **Brand:** Radxa
- **Price:** ~$139.5
- **CPU:** ARM Cortex-A76 ×4 @ 2.4GHz + Cortex-A55 ×4 @ 1.8GHz
- **RAM:** 4GB / 8GB / 16GB / 24GB / 32GB LPDDR5
- **Flash:** 16–128GB eMMC (optional) + 2× M.2 NVMe (PCIe 3.0 x2)
- **USB:** 2× USB 3.1 Gen1 Type-A, 2× USB 2.0 Type-A, 1× USB 3.1 Type-C (DP Alt Mode)
- **Power:** 12V DC
- **Dimensions:** 110 × 80mm

## Connectivity

WiFi 802.11 a/b/g/n/ac/ax (WiFi 6) | Bluetooth Bluetooth 5.2 | Ethernet 2× 2.5 Gbps Ethernet

## Components

- **RK3588** (soc): Rockchip RK3588: 4× Cortex-A76 @ 2.4GHz + 4× Cortex-A55 @ 1.8GHz, Mali-G610 MP4 GPU, 6 TOPS NPU, 8K H.265/VP9 decode @ 60fps. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=radxa-rock-5t&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| Pin 3 | I2C_SDA | — | digital-input, digital-output, i2c |
| Pin 5 | I2C_SCL | — | digital-input, digital-output, i2c |
| Pin 7 | GPIO | — | digital-input, digital-output |
| Pin 8 | UART_TX | — | digital-output, uart |
| Pin 10 | UART_RX | — | digital-input, uart |
| Pin 11 | GPIO | — | digital-input, digital-output |
| Pin 13 | GPIO | — | digital-input, digital-output |
| Pin 15 | GPIO | — | digital-input, digital-output |
| Pin 16 | GPIO | — | digital-input, digital-output |
| Pin 18 | GPIO | — | digital-input, digital-output |
| Pin 19 | SPI_MOSI | — | digital-output, spi |
| Pin 21 | SPI_MISO | — | digital-input, spi |
| Pin 22 | GPIO | — | digital-input, digital-output |
| Pin 23 | SPI_CLK | — | digital-output, spi |
| Pin 24 | SPI_CSn | — | digital-output, spi |
| Pin 27 | I2C_SDA (alt) | — | digital-input, digital-output, i2c |
| Pin 28 | I2C_SCL (alt) | — | digital-input, digital-output, i2c |
| Pin 29 | GPIO | — | digital-input, digital-output |
| Pin 31 | GPIO | — | digital-input, digital-output |
| Pin 32 | PWM | — | digital-output, pwm |
| Pin 33 | PWM | — | digital-output, pwm |
| Pin 35 | GPIO | — | digital-input, digital-output |
| Pin 36 | GPIO | — | digital-input, digital-output |
| Pin 37 | GPIO | — | digital-input, digital-output |
| Pin 38 | GPIO | — | digital-input, digital-output |
| Pin 40 | GPIO | — | digital-input, digital-output |

## Where to Buy

- [Arace Tech](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Frock5%2F5t%2F&ref=openhardware.directory&product=radxa-rock-5t&source=md-export) — 139.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Frock5%2F5t%2F&ref=openhardware.directory&product=radxa-rock-5t&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fradxa&ref=openhardware.directory&product=radxa-rock-5t&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=radxa-rock-5t&source=md-export)

## Tags

`rk3588`, `linux`, `arm`, `sbc`, `nas`, `2.5gbe`, `wifi6`, `npu`, `radxa`, `multi-display`, `nvme`

---
[View full device page](https://openhardware.directory/s/1370/radxa-rock-5t)

---

# Orange Pi 5 Plus

> The Orange Pi 5 Plus is an expanded version of the Orange Pi 5, featuring the full Rockchip RK3588 SoC with up to 32GB LPDDR4X RAM, dual Gigabit Ethernet, Wi-Fi 6, an M.2 NVMe slot, and two HDMI ports — designed for high-end desktop and server workloads.

## Quick Facts

- **Brand:** Xunlong
- **Price:** ~$90
- **CPU:** Rockchip RK3588 — 4x Cortex-A76 @ 2.4GHz + 4x Cortex-A55 @ 1.8GHz
- **RAM:** 4GB / 8GB / 16GB / 32GB LPDDR4X
- **Flash:** eMMC module + M.2 NVMe slot
- **USB:** 2x USB 3.0, 2x USB 2.0, 1x USB-C
- **Power:** USB-C Power Delivery

## Connectivity

WiFi Wi-Fi 6 (802.11 a/b/g/n/ac/ax) | Bluetooth BLE 5.0 | Ethernet 2x Gigabit Ethernet

## Components

- **RK3588** (soc): Octa-core SoC with 4x Cortex-A76 + 4x Cortex-A55, Mali-G610 GPU, 6 TOPS NPU, dual PCIe 3.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=orange-pi-5-plus&source=md-export)

## Where to Buy

- [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fstore%2F1553371&ref=openhardware.directory&product=orange-pi-5-plus&source=md-export) — 90.00

## Links

- [product](https://openhardware.directory/r?to=http%3A%2F%2Fwww.orangepi.org%2Fhtml%2FhardWare%2FcomputerAndMicrocontrollers%2Fdetails%2FOrange-Pi-5-plus.html&ref=openhardware.directory&product=orange-pi-5-plus&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Forange-pi-5-plus%2F&ref=openhardware.directory&product=orange-pi-5-plus&source=md-export)

## Tags

`sbc`, `linux`, `rockchip`, `rk3588`, `arm64`, `4k`, `8k`, `npu`, `nvme`, `wifi6`, `dual-ethernet`, `armbian`

---
[View full device page](https://openhardware.directory/s/1370/orange-pi-5-plus)

---

# ODROID HC4

> The ODROID HC4 is a NAS-focused single-board computer from Hardkernel with the Amlogic S905X3 SoC, 4GB DDR4 RAM, and two direct-connect SATA ports for dual-drive storage. It is purpose-built for home NAS and media server applications.

## Quick Facts

- **Brand:** Hardkernel
- **Price:** ~$65
- **CPU:** Amlogic S905X3 (Cortex-A55×4 @ 2.0 GHz)
- **RAM:** 4GB DDR4
- **Flash:** SPI flash (boot)
- **USB:** USB 3.0 ×1, USB 2.0 ×1
- **Power:** 12V/2A DC barrel jack
- **Dimensions:** 110 × 110 mm

## Connectivity

Ethernet Gigabit Ethernet (1000 Mbps)

## Components

- **Amlogic S905X3** (soc): Amlogic S905X3 quad-core Cortex-A55 SoC with Mali-G31 GPU, supporting 4K HDR decode at up to 2.0 GHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amlogic.com%2F%23Products%2F393%2Findex.html&ref=openhardware.directory&product=odroid-hc4&source=md-export)

## Where to Buy

- [Hardkernel](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hardkernel.com%2Fshop%2Fodroid-hc4%2F&ref=openhardware.directory&product=odroid-hc4&source=md-export) — 65.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hardkernel.com%2Fshop%2Fodroid-hc4%2F&ref=openhardware.directory&product=odroid-hc4&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.odroid.com%2Fodroid-hc4%2Fodroid-hc4&ref=openhardware.directory&product=odroid-hc4&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/odroid-hc4)

---

# TQ-Systems MBa8MPxL

> Full-featured industrial carrier board for TQ-Systems TQMa8MPxL SOM with NXP i.MX 8M Plus, 4GB LPDDR4, 16GB eMMC, PCIe, SATA, dual Gigabit Ethernet, and 12V DC supply, designed for demanding industrial Linux deployments.

## Quick Facts

- **Brand:** TQ-Systems
- **Board Type:** linux-sbc
- **Price:** ~$742
- **CPU:** nxp-imx8mp
- **RAM:** 4GB LPDDR4
- **Flash:** 16GB eMMC
- **USB:** USB 3.0 + USB-C
- **Power:** 12V DC

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- armbian

## Where to Buy

- [TQ Embedded Shop](https://openhardware.directory/r?to=https%3A%2F%2Fembeddedshop.tq-group.com%2Fen%2F&ref=openhardware.directory&product=mba8mpxl&source=md-export) — $742.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fmba8mpxl%2F&ref=openhardware.directory&product=mba8mpxl&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/mba8mpxl)

---

# Banana Pi CM4 IO

> Banana Pi CM4 IO is an SBC carrier board for the BPI-CM4 compute module, featuring RK3566, 4GB LPDDR4, 32GB eMMC, WiFi 5, PCIe, HDMI, and Gigabit Ethernet.

## Quick Facts

- **Brand:** Banana Pi
- **Board Type:** linux-sbc
- **Price:** ~$15
- **CPU:** Rockchip RK3566
- **RAM:** 4GB LPDDR4
- **Flash:** 32GB eMMC
- **USB:** USB 3.0
- **Power:** 12V DC barrel jack

## Connectivity

WiFi WiFi 5 (802.11ac) | Bluetooth BT 5.0 | Ethernet Gigabit Ethernet (10/100/1000M)

## Compatible Firmware

- armbian

## Components

- **Rockchip RK3566** (soc): Rockchip RK3566 quad-core Cortex-A55 SoC at 1.8GHz with Mali-G52 GPU and 0.8 TOPS NPU for light AI inference. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2021%2F0113%2F1176.html&ref=openhardware.directory&product=bananapi-cm4-io&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2F1005005115415086.html&ref=openhardware.directory&product=bananapi-cm4-io&source=md-export) — $15.00

## Links

- [product](https://openhardware.directory/r?to=http%3A%2F%2Fwww.banana-pi.org%2Fen%2Fbanana-pi-sbcs%2F174.html&ref=openhardware.directory&product=bananapi-cm4-io&source=md-export)
- [vendor](https://openhardware.directory/r?to=http%3A%2F%2Fwww.banana-pi.org%2Fen%2Fbanana-pi-sbcs%2F174.html&ref=openhardware.directory&product=bananapi-cm4-io&source=md-export)

## Tags

`banana-pi`, `rockchip`, `rk3566`, `sbc`, `linux`, `armbian`, `compute-module`, `pcie`, `wifi5`, `single-board-computer`, `cm4`

---
[View full device page](https://openhardware.directory/s/1370/bananapi-cm4-io)

---

# Radxa E52C

> Compact Rockchip RK3582 router and gateway board with 4GB/8GB LPDDR4X, dual 2.5GbE, mini-PCIe with SIM slot, USB 3.0, and eMMC — ideal for network appliances and edge computing.

## Quick Facts

- **Brand:** Radxa
- **Board Type:** linux-sbc
- **Price:** ~$55
- **CPU:** Rockchip RK3582
- **RAM:** 4GB / 8GB LPDDR4X
- **Flash:** eMMC (onboard)
- **Power:** 12V DC barrel jack

## Connectivity

Ethernet 2x 2.5 GbE

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arace Tech](https://openhardware.directory/r?to=https%3A%2F%2Farace.tech%2Fproducts%2Fradxa-e52c&ref=openhardware.directory&product=radxa-e52c&source=md-export) — $55.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Fnetwork-computer%2Fe52c&ref=openhardware.directory&product=radxa-e52c&source=md-export)
- [armbian](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fradxa-e52c%2F&ref=openhardware.directory&product=radxa-e52c&source=md-export)

## Tags

`radxa`, `e52c`, `rk3582`, `gateway`, `router`, `2.5gbe`, `linux`, `armbian`, `mini-pcie`

---
[View full device page](https://openhardware.directory/s/1370/radxa-e52c)

---

# Banana Pi M4 Zero

> Banana Pi M4 Zero is a compact Zero-form-factor SBC powered by the Rockchip RK3528 quad-core SoC with up to 4GB DDR4, 16GB eMMC, WiFi 5, Bluetooth 5.0, and USB-C power.

## Quick Facts

- **Brand:** Banana Pi
- **Board Type:** linux-sbc
- **Price:** ~$29
- **CPU:** Rockchip RK3528
- **RAM:** 1GB/2GB/4GB DDR4
- **Flash:** 8GB/16GB eMMC
- **USB:** USB-C OTG + USB 2.0 Host
- **Power:** 5V

## Connectivity

WiFi WiFi 5 (802.11ac) | Bluetooth BT 5.0 | Ethernet Fast Ethernet (10/100M)

## Compatible Firmware

- armbian

## Components

- **Rockchip RK3528** (soc): Rockchip RK3528 quad-core Cortex-A53 SoC at 2.0GHz with Mali-450 GPU and 4K H.265 hardware video decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F1012%2F1681.html&ref=openhardware.directory&product=bananapi-m4-zero&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Banana Pi](https://openhardware.directory/r?to=https%3A%2F%2Fwww.banana-pi.org%2Fen%2Fbanana-pi-sbcs%2F171.html&ref=openhardware.directory&product=bananapi-m4-zero&source=md-export) — $29.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fbananapi-m4-zero%2F&ref=openhardware.directory&product=bananapi-m4-zero&source=md-export)
- [vendor](https://openhardware.directory/r?to=https%3A%2F%2Fwww.banana-pi.org%2Fen%2Fbanana-pi-sbcs%2F171.html&ref=openhardware.directory&product=bananapi-m4-zero&source=md-export)

## Tags

`banana-pi`, `rockchip`, `rk3528`, `sbc`, `linux`, `armbian`, `zero-form-factor`, `wifi5`, `bluetooth`, `usb-c`, `single-board-computer`, `compact`

---
[View full device page](https://openhardware.directory/s/1370/bananapi-m4-zero)

---

# TI SK-AM64B

> Texas Instruments SK-AM64B Starter Kit — dual Cortex-A53 + quad Cortex-R5F industrial evaluation board for automation, motor control, and time-sensitive networking.

## Quick Facts

- **Brand:** Texas Instruments
- **Board Type:** linux-sbc
- **Price:** ~$129
- **CPU:** ti-am64x
- **RAM:** 2GB DDR4
- **Flash:** none
- **USB:** USB-C, USB 3.0
- **Power:** 5V

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [TI Store](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FSK-AM64B%2Fpart-details%2FSK-AM64B&ref=openhardware.directory&product=ti-sk-am64b&source=md-export) — $129.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Ftool%2FSK-AM64B&ref=openhardware.directory&product=ti-sk-am64b&source=md-export)

## Tags

`linux-sbc`, `armbian`, `cortex-a53`, `cortex-r5f`, `industrial`, `texas-instruments`, `developer-kit`, `real-time`

---
[View full device page](https://openhardware.directory/s/1370/ti-sk-am64b)

---

# ODROID-C1

> Hardkernel ODROID-C1 — affordable quad-core Cortex-A5 SBC with 1GB DDR3, Fast Ethernet, and four USB 2.0 ports, one of the earliest Raspberry Pi competitors running Armbian.

## Quick Facts

- **Brand:** Hardkernel
- **Board Type:** linux-sbc
- **Price:** ~$35
- **CPU:** amlogic-s805
- **RAM:** 1GB DDR3
- **Flash:** eMMC
- **USB:** USB 2.0 ×4
- **Power:** 5V via micro-USB

## Connectivity

Ethernet 100Mbps

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hardkernel.com%2Fshop%2Fodroid-c1%2F&ref=openhardware.directory&product=odroid-c1&source=md-export)

## Tags

`linux-sbc`, `armbian`, `amlogic`, `cortex-a5`, `hardkernel`, `odroid`

---
[View full device page](https://openhardware.directory/s/1370/odroid-c1)

---

# Libre Computer Tritium H3

> Libre Computer Tritium H3 — Allwinner H3 quad-core SBC with 1GB DDR3, 8GB eMMC, 100Mbps Ethernet, and four USB 2.0 ports in a Raspberry Pi 2/3 compatible layout.

## Quick Facts

- **Brand:** Libre Computer
- **Board Type:** linux-sbc
- **Price:** ~$30
- **CPU:** allwinner-h3
- **RAM:** 1GB DDR3
- **Flash:** 8GB eMMC
- **USB:** USB 2.0 ×4
- **Power:** 5V via micro-USB

## Connectivity

Ethernet 100Mbps

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FLibre-Computer-Board-ALL-H3-CC-Tritium%2Fdp%2FB07D4KTRWR&ref=openhardware.directory&product=tritium-h3&source=md-export) — $30.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flibre.computer%2Fproducts%2Fall-h3-cc%2F&ref=openhardware.directory&product=tritium-h3&source=md-export)

## Tags

`linux-sbc`, `armbian`, `allwinner-h3`, `libre-computer`, `raspberry-pi-alternative`, `tritium`

---
[View full device page](https://openhardware.directory/s/1370/tritium-h3)

---

# Libre Computer Tritium H5

> Libre Computer Tritium H5 — Allwinner H5 quad-core 64-bit SBC with 1GB/2GB DDR4, 8GB eMMC, Gigabit Ethernet, and four USB 2.0 ports in a Raspberry Pi-compatible layout.

## Quick Facts

- **Brand:** Libre Computer
- **Board Type:** linux-sbc
- **Price:** ~$45
- **CPU:** allwinner-h5
- **RAM:** 1GB/2GB DDR4
- **Flash:** 8GB eMMC
- **USB:** USB 2.0 ×4
- **Power:** 5V via micro-USB

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flibre.computer%2Fproducts%2Fall-h5-cc%2F&ref=openhardware.directory&product=tritium-h5&source=md-export)

## Tags

`linux-sbc`, `armbian`, `allwinner-h5`, `libre-computer`, `raspberry-pi-alternative`, `tritium`, `64-bit`

---
[View full device page](https://openhardware.directory/s/1370/tritium-h5)

---

# Helios4

> Open-source 4-bay NAS server board by Kobol, powered by the Marvell Armada 388 SoC, 2GB DDR3, 4× SATA, Gigabit Ethernet, USB 3.0, and 12V DC — designed for self-hosted home and SMB network storage.

## Quick Facts

- **Brand:** Kobol
- **Board Type:** linux-sbc
- **Price:** ~$149
- **CPU:** Dual-core Cortex-A9 @ 1.6GHz (Marvell Armada 388)
- **RAM:** 2GB DDR3
- **Flash:** microSD only
- **USB:** USB 3.0 + USB 2.0
- **Power:** 12V DC

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- armbian

## Components

- **Marvell-Armada-388** (soc): Marvell Armada 388 (88F6828) dual-core Cortex-A9 @ 1.6GHz SoC with hardware crypto engine, optimized for networking and NAS. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.marvell.com%2Fproducts%2Finfrastructure-processors%2Fnetworking-and-gateway%2Farmada-38x.html&ref=openhardware.directory&product=helios4&source=md-export)

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fkobol.io%2Fhelios4%2F&ref=openhardware.directory&product=helios4&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fkobol-io%2Fhelios4&ref=openhardware.directory&product=helios4&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fhelios4%2F&ref=openhardware.directory&product=helios4&source=md-export)

## Tags

`nas`, `self-hosted`, `storage`, `marvell`, `armada`, `sata`, `open-hardware`, `home-server`

---
[View full device page](https://openhardware.directory/s/1370/helios4)

---

# Radxa NIO 12L

> Radxa NIO 12L — MediaTek Dimensity 1200 (MT8395) octa-core SBC with 8GB/16GB LPDDR4X, 64GB/128GB eMMC, WiFi 6, Gigabit Ethernet, and USB-C, running Armbian Linux.

## Quick Facts

- **Brand:** Radxa
- **Board Type:** linux-sbc
- **Price:** ~$99
- **CPU:** mediatek-mt8395
- **RAM:** 8GB/16GB LPDDR4X
- **Flash:** 64GB/128GB eMMC
- **USB:** USB-C 3.2 Gen 1
- **Power:** 5V

## Connectivity

WiFi 802.11ax (WiFi 6) | Bluetooth BLE 5.2 | Ethernet Gigabit

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Arace Tech](https://openhardware.directory/r?to=https%3A%2F%2Farace.tech%2Fproducts%2Fradxa-nio-12l&ref=openhardware.directory&product=radxa-nio-12l&source=md-export) — $99.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Fnio%2F12l%2F&ref=openhardware.directory&product=radxa-nio-12l&source=md-export)

## Tags

`linux-sbc`, `armbian`, `mediatek`, `dimensity-1200`, `radxa`, `wifi6`, `gigabit`

---
[View full device page](https://openhardware.directory/s/1370/radxa-nio-12l)

---

# Helios64

> Open-source 5-bay NAS server board by Kobol, powered by the Rockchip RK3399 SoC, 4GB LPDDR4, eMMC, WiFi 5+BT 5.0, 2.5GbE, 5× SATA, and 12V DC — a high-performance personal cloud storage platform.

## Quick Facts

- **Brand:** Kobol
- **Board Type:** linux-sbc
- **Price:** ~$189
- **CPU:** Dual Cortex-A72 @ 2GHz + Quad Cortex-A53 @ 1.5GHz (Rockchip RK3399)
- **RAM:** 4GB LPDDR4
- **Flash:** 16GB eMMC
- **USB:** USB 3.0 + USB-C
- **Power:** 12V DC

## Connectivity

WiFi 802.11ac (WiFi 5) | Bluetooth BLE 5.0 | Ethernet 2.5 Gigabit

## Compatible Firmware

- armbian

## Components

- **RK3399** (soc): Rockchip RK3399 hexa-core SoC with dual Cortex-A72 @ 2GHz + quad Cortex-A53 @ 1.5GHz and Mali-T860 MP4 GPU. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK33_Series%2F2016%2F0412%2F758.html&ref=openhardware.directory&product=helios64&source=md-export)

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fkobol.io%2Fhelios64%2F&ref=openhardware.directory&product=helios64&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fkobol-io%2Fhelios64&ref=openhardware.directory&product=helios64&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fhelios64%2F&ref=openhardware.directory&product=helios64&source=md-export)

## Tags

`nas`, `self-hosted`, `personal-cloud`, `rockchip`, `rk3399`, `5-bay`, `sata`, `2.5gbe`

---
[View full device page](https://openhardware.directory/s/1370/helios64)

---

# JetHub H1

> DIN-rail mountable Linux IoT hub by JetHome, powered by the Amlogic S905W SoC with 2GB DDR4, 8GB eMMC, WiFi 802.11n, Bluetooth 4.0, Gigabit Ethernet, and 12V DC — compact smart home controller for panel installation.

## Quick Facts

- **Brand:** JetHome
- **Board Type:** linux-sbc
- **Price:** ~$52
- **CPU:** Quad-core Cortex-A53 @ 1.2GHz (Amlogic S905W)
- **RAM:** 2GB DDR4
- **Flash:** 8GB eMMC
- **USB:** USB 2.0 + USB-C
- **Power:** 12V DC

## Connectivity

WiFi 802.11n (WiFi 4) | Bluetooth 4.0 | Ethernet Gigabit

## Compatible Firmware

- armbian

## Components

- **Amlogic-S905W** (soc): Amlogic S905W quad-core Cortex-A53 @ 1.2GHz SoC with Mali-450 GPU for media and IoT hub applications. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amlogic.com%2F%23Products%2F386%2Findex.html&ref=openhardware.directory&product=jethub-h1&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [JetHome](https://openhardware.directory/r?to=https%3A%2F%2Fjethome.ru%2Fh1%2F%3Fselected_section%3Dproduct_reviews%26sl%3Den&ref=openhardware.directory&product=jethub-h1&source=md-export) — $52.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fjethome.ru%2Fjethub-h1%2F&ref=openhardware.directory&product=jethub-h1&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fjethub-h1%2F&ref=openhardware.directory&product=jethub-h1&source=md-export)

## Tags

`home-automation`, `iot-gateway`, `din-rail`, `amlogic`, `smart-home`, `embedded-linux`

---
[View full device page](https://openhardware.directory/s/1370/jethub-h1)

---

# Adafruit Feather RP2040 SCORPIO

> RP2040 Feather board with 8 consecutive 5V-level-shifted PIO outputs dedicated to NeoPixel LED strip control, 8MB flash, USB-C, and LiPo charging.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** feather
- **Price:** ~$14.5
- **CPU:** RP2040
- **RAM:** 264 KB
- **Flash:** 8 MB
- **Power:** 5V + LiPo
- **Dimensions:** 50.8 x 22.8 x 7 mm

## Compatible Firmware

- circuitpython
- micropython
- arduino

## Components

- **RP2040** (mcu): Dual-core ARM Cortex-M0+ at 125 MHz with 264KB SRAM and PIO state machines. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=adafruit-feather-rp2040-scorpio&source=md-export)
- **WS2812B NeoPixel RGB LED** (led): Onboard addressable RGB NeoPixel on D4 for status indication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=adafruit-feather-rp2040-scorpio&source=md-export)

## Protocols

- **I2C**: SDA=GPIO24, SCL=GPIO25
- **SPI**: MOSI=GPIO11, MISO=GPIO12, SCK=GPIO13
- **UART**: TX=GPIO0, RX=GPIO1
- **PIO**: OUT0=GPIO16, OUT1=GPIO17, OUT2=GPIO18, OUT3=GPIO19, OUT4=GPIO20, OUT5=GPIO21, OUT6=GPIO22, OUT7=GPIO23

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | TX | — | uart-tx, digital |
| GPIO1 | RX | — | uart-rx, digital |
| GPIO2 | D2 | — | digital, pwm |
| GPIO3 | D3 | — | digital, pwm |
| GPIO4 | D4 | — | digital, pwm |
| GPIO5 | D5 | — | digital, pwm |
| GPIO6 | D6 | — | digital, pwm |
| GPIO7 | Bootloader Button | — | digital |
| GPIO8 | D8 | — | digital, pwm |
| GPIO9 | D9 | — | digital, pwm |
| GPIO11 | MOSI | — | spi-mosi, digital |
| GPIO12 | MISO | — | spi-miso, digital |
| GPIO13 | SCK / Red LED | — | spi-sck, digital |
| GPIO16 | NeoPixel Out 0 | — | digital, pio |
| GPIO17 | NeoPixel Out 1 | — | digital, pio |
| GPIO18 | NeoPixel Out 2 | — | digital, pio |
| GPIO19 | NeoPixel Out 3 | — | digital, pio |
| GPIO20 | NeoPixel Out 4 | — | digital, pio |
| GPIO21 | NeoPixel Out 5 | — | digital, pio |
| GPIO22 | NeoPixel Out 6 | — | digital, pio |
| GPIO23 | NeoPixel Out 7 | — | digital, pio |
| GPIO24 | SDA | — | i2c-sda, digital |
| GPIO25 | SCL | — | i2c-scl, digital |
| GPIO26 | A0 | — | analog, digital |
| GPIO27 | A1 | — | analog, digital |
| GPIO28 | A2 | — | analog, digital |
| GPIO29 | A3 | — | analog, digital |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5650&ref=openhardware.directory&product=adafruit-feather-rp2040-scorpio&source=md-export) — 14.5

## Available Software

- [NeoPXL8 Arduino Library](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_NeoPXL8&ref=openhardware.directory&product=adafruit-feather-rp2040-scorpio&source=md-export)
- [NeoPXL8 CircuitPython Library](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit_CircuitPython_NeoPxl8&ref=openhardware.directory&product=adafruit-feather-rp2040-scorpio&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5650&ref=openhardware.directory&product=adafruit-feather-rp2040-scorpio&source=md-export)
- [learn Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fintroducing-feather-rp2040-scorpio&ref=openhardware.directory&product=adafruit-feather-rp2040-scorpio&source=md-export)

## Tags

`adafruit`, `feather`, `rp2040`, `neopixel`, `led-driver`, `ws2812`, `circuitpython`, `pio`

## Certifications

RoHS

---
[View full device page](https://openhardware.directory/s/1370/adafruit-feather-rp2040-scorpio)

---

# Adafruit ItsyBitsy 32u4 5V 16MHz

> Ultra-compact 5V Arduino-compatible board with ATmega32u4 at 16MHz, native USB HID, 23 GPIO pins, 2KB RAM, 28KB flash, and Micro USB. Measures 35mm × 18mm — small form factor with full Arduino Leonardo capability.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$9.95
- **CPU:** Atmel ATmega32u4 AVR
- **RAM:** 2 KB
- **Flash:** 28 KB
- **GPIO:** 23 pins
- **Power:** 5V via Micro USB or up to 16V via VIN pin
- **Dimensions:** 35mm × 18mm × 4.1mm

## Compatible Firmware

- arduino

## Components

- **ATmega32u4** (mcu): 8-bit AVR microcontroller at 16 MHz with 32KB flash, 2.5KB SRAM, native USB HID/CDC/MIDI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=adafruit-itsybitsy-32u4-5v&source=md-export)

## Protocols

- **I2C**: SDA=D2, SCL=D3
- **SPI**: MOSI=D16, MISO=D14, SCK=D15, SS=D10
- **UART**: TX=D1, RX=D0
- **USB-HID**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | RX | — | digital-input, digital-output |
| D1 | TX | — | digital-input, digital-output |
| D2 | SDA | — | digital-input, digital-output |
| D3 | SCL | — | digital-input, digital-output, pwm |
| D4 | GPIO | — | digital-input, digital-output |
| D5 | GPIO | — | digital-input, digital-output, pwm |
| D6 | GPIO | — | digital-input, digital-output, pwm |
| D7 | GPIO | — | digital-input, digital-output |
| D9 | GPIO | — | digital-input, digital-output, pwm |
| D10 | SS | — | digital-input, digital-output, pwm |
| D11 | GPIO | — | digital-input, digital-output, pwm |
| D12 | GPIO | — | digital-input, digital-output |
| D13 | LED | — | digital-input, digital-output |
| D14 | MISO | — | digital-input, digital-output |
| D15 | SCK | — | digital-input, digital-output |
| D16 | MOSI | — | digital-input, digital-output |
| A0 | ADC | — | digital-input, digital-output, analog-input |
| A1 | ADC | — | digital-input, digital-output, analog-input |
| A2 | ADC | — | digital-input, digital-output, analog-input |
| A3 | ADC | — | digital-input, digital-output, analog-input |
| A4 | ADC | — | digital-input, digital-output, analog-input |
| A5 | ADC | — | digital-input, digital-output, analog-input |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3677&ref=openhardware.directory&product=adafruit-itsybitsy-32u4-5v&source=md-export) — 9.95

## Available Software


## Links

- [product Page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3677&ref=openhardware.directory&product=adafruit-itsybitsy-32u4-5v&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3677&ref=openhardware.directory&product=adafruit-itsybitsy-32u4-5v&source=md-export)
- [documentation](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fintroducting-itsy-bitsy-32u4&ref=openhardware.directory&product=adafruit-itsybitsy-32u4-5v&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-ItsyBitsy-32u4-PCB&ref=openhardware.directory&product=adafruit-itsybitsy-32u4-5v&source=md-export)

## Tags

`arduino`, `atmega32u4`, `usb-hid`, `5v`, `compact`, `adafruit`, `itsybitsy`, `avr`

---
[View full device page](https://openhardware.directory/s/1370/adafruit-itsybitsy-32u4-5v)

---

# Heltec Capsule Sensor V3

> Ultra-compact IP65 waterproof LoRa sensor capsule with ESP32-S3, SX1262 LoRa, GNSS, temperature/humidity, barometric pressure, and 3-axis accelerometer. Meshtastic-compatible with 250mAh battery and over 1 year battery life.

## Quick Facts

- **Brand:** heltec
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, vector instructions
- **RAM:** 512KB SRAM
- **Flash:** 8MB (QSPI)
- **USB:** None (WirelessBoot OTA via WiFi)
- **Power:** 3.7V lithium battery, 5V magnetic charging
- **Dimensions:** 26 × 26 × 47mm (cylindrical)

## Connectivity

WiFi 802.11 b/g/n 2.4GHz | Bluetooth BLE 5.0, Bluetooth Mesh

## Components

- **ESP32-S3FN8** (mcu): Espressif ESP32-S3FN8 dual-core Xtensa LX7 at 240MHz with 8MB flash, WiFi 802.11 b/g/n and BLE 5.0. Provides the main processing, wireless connectivity, and deep sleep power management. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=heltec-capsule-sensor-v3&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver supporting 150-960MHz frequency bands with +21dBm TX power and -135dBm receive sensitivity for long-range communication up to 6km+ line-of-sight. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1262&ref=openhardware.directory&product=heltec-capsule-sensor-v3&source=md-export)
- **L76K** (gps): Quectel L76K compact GNSS module supporting GPS, BeiDou, GLONASS, and QZSS with <2m CEP accuracy, cold start under 30s, and 5Hz update rate. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fupload%2Fd%2Fdb%2FQuectel_L76K_Hardware_Design_V1.0.pdf&ref=openhardware.directory&product=heltec-capsule-sensor-v3&source=md-export)
- **GXHTC3** (sensor): GXCAS GXHTC3 temperature and humidity sensor with ±0.3°C temperature accuracy, ±3% RH humidity accuracy, 16-bit digital output via I2C. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2Fsensor%2FGXHTC3_EN_V2.4.pdf&ref=openhardware.directory&product=heltec-capsule-sensor-v3&source=md-export)
- **BMP280** (pressure-sensor): Bosch BMP280 digital barometric pressure sensor with ±1 hPa absolute accuracy and ±1°C temperature accuracy, useful for altitude estimation and weather monitoring. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fproducts%2Fenvironmental-sensors%2Fpressure-sensors%2Fbmp280%2F&ref=openhardware.directory&product=heltec-capsule-sensor-v3&source=md-export)
- **DA217** (accelerometer): MiraMEMS DA217 3-axis MEMS accelerometer with 14-bit resolution, selectable ±2g/±4g/±8g/±16g range, I2C interface for motion detection, tilt sensing, and activity recognition. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fgaupen1186%2FDA217_Driver%2Fblob%2Fmain%2FMira_DA217.pdf&ref=openhardware.directory&product=heltec-capsule-sensor-v3&source=md-export)

## Protocols

- **SPI** (SPI0): SS=GPIO8, MOSI=GPIO10, MISO=GPIO11, SCK=GPIO9
- **I2C**: SDA=GPIO41, SCL=GPIO42
- **UART** (UART0): TX=GPIO43, RX=GPIO44
- **UART** (UART1): TX=GPIO4, RX=GPIO5

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | GPS PPS | — | digital-input, digital-output, adc, touch |
| GPIO3 | GPS Reset | — | digital-input, digital-output, adc, touch |
| GPIO4 | GPS TX | — | digital-input, digital-output, adc, touch, pwm |
| GPIO5 | GPS RX | — | digital-input, digital-output, adc, touch, pwm |
| GPIO7 | Battery ADC | — | digital-input, digital-output, adc, touch, pwm |
| GPIO8 | LoRa NSS (SPI CS) | — | digital-input, digital-output, touch, pwm |
| GPIO9 | LoRa SCK | — | digital-input, digital-output, touch, pwm |
| GPIO10 | LoRa MOSI | — | digital-input, digital-output, touch, pwm |
| GPIO11 | LoRa MISO | — | digital-input, digital-output, touch, pwm |
| GPIO12 | LoRa Reset | — | digital-input, digital-output, touch, pwm |
| GPIO13 | LoRa BUSY | — | digital-input, digital-output, touch, pwm |
| GPIO14 | LoRa DIO1 (IRQ) | — | digital-input, digital-output, touch, pwm |
| GPIO18 | User Button | — | digital-input, digital-output, pwm |
| GPIO21 | Vext Power Control | — | digital-input, digital-output, pwm |
| GPIO36 | Battery ADC Control | — | digital-input, digital-output, pwm |
| GPIO41 | I2C SDA (Sensors) | — | digital-input, digital-output, pwm |
| GPIO42 | I2C SCL (Sensors) | — | digital-input, digital-output, pwm |
| GPIO43 | UART TX (Debug) | — | digital-input, digital-output, pwm |
| GPIO44 | UART RX (Debug) | — | digital-input, digital-output, pwm |

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fheltec-capsule-sensor-v3%2F&ref=openhardware.directory&product=heltec-capsule-sensor-v3&source=md-export) — $25.90
- [AliExpress (Heltec Official)](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2F1005007033187034.html&ref=openhardware.directory&product=heltec-capsule-sensor-v3&source=md-export) — $25.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fheltec-capsule-sensor-v3%2F&ref=openhardware.directory&product=heltec-capsule-sensor-v3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltec_ESP32&ref=openhardware.directory&product=heltec-capsule-sensor-v3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fesp32-series%2Flora-32%2Fcapsule-sensor-v3%2F&ref=openhardware.directory&product=heltec-capsule-sensor-v3&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHeltec%2520Capsule%2520Sensor%2520V3%2FCapSule%2520Sensor%2520V3.pdf&ref=openhardware.directory&product=heltec-capsule-sensor-v3&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHeltec%2520Capsule%2520Sensor%2520V3%2FCapsule_Main_Esp32_Schematic_Diagram.pdf&ref=openhardware.directory&product=heltec-capsule-sensor-v3&source=md-export)

## Tags

`lorawan`, `meshtastic`, `esp32-s3`, `sx1262`, `gps`, `sensor`, `ip65`, `portable`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/heltec-capsule-sensor-v3)

---

# BeagleBone Black Industrial

> Industrial-rated BeagleBone Black with extended temperature range (-40°C to +85°C), TI Sitara AM3358 ARM Cortex-A8 at 1 GHz, full cape and software compatibility, for harsh environment deployments.

## Quick Facts

- **Brand:** BeagleBoard
- **Board Type:** Single Board Computer
- **Price:** ~$66.19
- **CPU:** TI Sitara AM3358 (ARM Cortex-A8 @ 1 GHz)
- **RAM:** 512MB DDR3L
- **Flash:** 4GB eMMC
- **GPIO:** 2x 46-pin headers (92 pins) pins
- **USB:** USB 2.0 (client,host)
- **Power:** 5V DC via USB or expansion header

## Connectivity

Ethernet 10/100M Ethernet

## Compatible Firmware

- Debian Linux

## Components

- **AM3358** (processor): Texas Instruments Sitara AM3358 industrial-grade SoC with 1GHz ARM Cortex-A8, SGX530 graphics, NEON accelerator, and 2x 200MHz PRUs, rated for -40°C to +85°C — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FAM3358&ref=openhardware.directory&product=beaglebone-black-industrial&source=md-export)
- **512MB DDR3L** (memory): 512MB DDR3L SDRAM rated for industrial temperature range — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FAM3358&ref=openhardware.directory&product=beaglebone-black-industrial&source=md-export)
- **4GB eMMC** (storage): 4GB embedded MMC flash storage for OS and applications — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FAM3358&ref=openhardware.directory&product=beaglebone-black-industrial&source=md-export)

## Protocols

- **USB 2.0**
- **HDMI**
- **UART**
- **I2C**
- **SPI**
- **ADC**
- **PWM**
- **JTAG**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Fbeagleboard-by-seeed-studio%2F102110423%2F12342853&ref=openhardware.directory&product=beaglebone-black-industrial&source=md-export) — $66.19
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FBeagleBoard-by-Seeed-Studio%2F102110423&ref=openhardware.directory&product=beaglebone-black-industrial&source=md-export) — $66.19
- [Element14](https://openhardware.directory/r?to=https%3A%2F%2Freferral.element14.com%2FOrderCodeView%3Ffsku%3D3520083%26nsku%3D88AH7403&ref=openhardware.directory&product=beaglebone-black-industrial&source=md-export) — $66.19

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.beagleboard.org%2Fboards%2Fbeaglebone-black-industrial&ref=openhardware.directory&product=beaglebone-black-industrial&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fopenbeagle.org%2Fbeagleboard%2Fbeaglebone-black&ref=openhardware.directory&product=beaglebone-black-industrial&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.beagleboard.org%2Flatest%2Fboards%2Fbeaglebone%2Fblack%2F&ref=openhardware.directory&product=beaglebone-black-industrial&source=md-export)

## Tags

`beagleboard`, `industrial`, `arm-cortex-a8`, `single-board-computer`, `linux`, `open-hardware`, `extended-temperature`, `rugged`

---
[View full device page](https://openhardware.directory/s/1370/beaglebone-black-industrial)

---

# Arduino Portenta X8

> Industrial-grade Linux SoM with NXP i.MX 8M Mini quad-core Cortex-A53 at 1.8GHz + STM32H747 dual-core Cortex-M7/M4, 2GB RAM, WiFi/BLE, NXP SE050 hardware security, Docker containers, and OTA updates for edge computing.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** compute-module
- **Price:** ~$202
- **CPU:** ARM Cortex-A53 quad-core @ 1.8GHz,Cortex-M7 @ 480MHz,Cortex-M4 @ 240MHz
- **RAM:** 2GB LPDDR4
- **Flash:** 16GB eMMC
- **USB:** USB-C
- **Power:** 5V
- **Dimensions:** 66.04 × 25.4mm

## Connectivity

WiFi 802.11 b/g/n/ac | Bluetooth BLE 5.1

## Compatible Firmware

- arduino
- micropython

## Components

- **i.MX8M-Mini** (mcu): NXP i.MX 8M Mini quad-core ARM Cortex-A53 at 1.8GHz running Linux with hardware video decode and 3D GPU. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FIMX8MMCEC.pdf&ref=openhardware.directory&product=arduino-portenta-x8&source=md-export)
- **STM32H747XI** (mcu): STM32H747 with Cortex-M7 at 480MHz + Cortex-M4 at 240MHz for Arduino sketch execution and real-time I/O. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32h747xi.pdf&ref=openhardware.directory&product=arduino-portenta-x8&source=md-export)
- **SE050C2** (sensor): NXP SE050C2 secure element for hardware key storage, crypto acceleration, X.509 certificates, and secure boot. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FSE050-DATASHEET.pdf&ref=openhardware.directory&product=arduino-portenta-x8&source=md-export)

## Protocols

- **SPI**: notes=Via high-density connectors
- **I2C**: notes=Via high-density connectors
- **UART**: notes=Via high-density connectors
- **CAN FD**: notes=Via high-density connectors

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Digital I/O | — | digital-input, digital-output, pwm |
| GPIO1 | Digital I/O | — | digital-input, digital-output, pwm |
| GPIO2 | Digital I/O | — | digital-input, digital-output, pwm |
| GPIO3 | Digital I/O | — | digital-input, digital-output, pwm |
| GPIO4 | Digital I/O | — | digital-input, digital-output, pwm |
| GPIO5 | Digital I/O | — | digital-input, digital-output, pwm |
| A0 | Analog Input | — | adc |
| A1 | Analog Input | — | adc |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fportenta-x8&ref=openhardware.directory&product=arduino-portenta-x8&source=md-export) — $202.00
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fportenta-x8&ref=openhardware.directory&product=arduino-portenta-x8&source=md-export) — €223.00
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FABX00049%2F16733929&ref=openhardware.directory&product=arduino-portenta-x8&source=md-export) — $223.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FABX00049&ref=openhardware.directory&product=arduino-portenta-x8&source=md-export) — $223.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fportenta-x8&ref=openhardware.directory&product=arduino-portenta-x8&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fportenta-x8%2F&ref=openhardware.directory&product=arduino-portenta-x8&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FABX00049-datasheet.pdf&ref=openhardware.directory&product=arduino-portenta-x8&source=md-export)

## Tags

`arduino`, `portenta`, `linux`, `industrial`, `imx8`, `stm32`, `docker`, `edge-computing`

---
[View full device page](https://openhardware.directory/s/1370/arduino-portenta-x8)

---

# BigTreeTech SKR Pico V1.0

> Compact 32-bit 3D printer control board powered by RP2040 @ 133MHz. Designed for Voron 0.1 and small printers. 4 TMC2209 sockets, USB-C, 12–24V input. Klipper and Marlin compatible.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$14.99
- **CPU:** RP2040
- **RAM:** 264KB
- **Flash:** 2MB (external)
- **USB:** USB Type-C
- **Power:** 12-24V DC

## Compatible Firmware

- Klipper
- Marlin

## Components

- **RP2040** (MCU): Raspberry Pi Foundation RP2040 dual-core ARM Cortex-M0+ microcontroller, 264KB SRAM, 2MB external flash, 133MHz, with programmable I/O state machines — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=bigtreetech-skr-pico-v1-0&source=md-export)
- **TMC2209 socket x4** (Stepper Driver Socket): 4x stepper driver sockets supporting TMC2209, TMC2208, and other popular drivers in UART/SPI mode — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.trinamic.com%2Ffileadmin%2Fassets%2FProducts%2FICs_Documents%2FTMC2209_Datasheet_V103.pdf&ref=openhardware.directory&product=bigtreetech-skr-pico-v1-0&source=md-export)
- **MicroSD slot** (Storage): MicroSD card slot for firmware and print file storage — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbtt-skr-pico-v1-0&ref=openhardware.directory&product=bigtreetech-skr-pico-v1-0&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbtt-skr-pico-v1-0&ref=openhardware.directory&product=bigtreetech-skr-pico-v1-0&source=md-export) — $14.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FSKR-Pico&ref=openhardware.directory&product=bigtreetech-skr-pico-v1-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbtt-skr-pico-v1-0&ref=openhardware.directory&product=bigtreetech-skr-pico-v1-0&source=md-export)

## Tags

`3d-printer`, `control-board`, `rp2040`, `klipper`, `marlin`, `bigtreetech`, `open-source`, `32-bit`, `tmc2209`, `voron`, `pico`, `compact`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-skr-pico-v1-0)

---

# BigTreeTech Octopus V1.1

> 32-bit 3D printer control board with STM32F446ZET6 MCU, 8 stepper driver slots (9 outputs), CAN bus via RJ11, USB-C, WiFi header, and support for Marlin and Klipper firmware.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$42.68
- **CPU:** STM32F446ZET6
- **RAM:** 128KB
- **Flash:** 512KB
- **USB:** USB Type-C
- **Power:** DC 12V or 24V
- **Dimensions:** 160 x 100 mm

## Compatible Firmware

- Marlin
- Klipper

## Components

- **STM32F446ZET6** (mcu): STMicroelectronics 32-bit ARM Cortex-M4 at 180MHz, 512KB Flash, 128KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32f446re.pdf&ref=openhardware.directory&product=bigtreetech-octopus-v1-1&source=md-export)
- **AT24C32** (eeprom): 32Kbit I2C serial EEPROM for persistent configuration storage. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2Fdoc0336.pdf&ref=openhardware.directory&product=bigtreetech-octopus-v1-1&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**
- **CAN bus**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-octopus-v1-1&ref=openhardware.directory&product=bigtreetech-octopus-v1-1&source=md-export) — $42.68

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBIGTREETECH-OCTOPUS-V1.0&ref=openhardware.directory&product=bigtreetech-octopus-v1-1&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-octopus-v1-1&ref=openhardware.directory&product=bigtreetech-octopus-v1-1&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.bttwiki.com%2FOctopus.html&ref=openhardware.directory&product=bigtreetech-octopus-v1-1&source=md-export)

## Tags

`3d-printer`, `control-board`, `stm32`, `stm32f446`, `marlin`, `klipper`, `stepper-driver`, `can-bus`, `voron`, `bigtreetech`, `open-source`, `cortex-m4`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-octopus-v1-1)

---

# NanoPC-T6 LTS

> Long-term support RK3588 SBC with 4x Cortex-A76 + 4x Cortex-A53 at 2.4GHz, up to 16GB LPDDR4X, NVMe PCIe 3.0 x4, dual 2.5GbE, dual HDMI, MIPI-CSI/DSI, 6 TOPS NPU, and 40-pin GPIO — the LTS variant for production deployments.

## Quick Facts

- **Brand:** FriendlyElec
- **Board Type:** sbc
- **Price:** ~$147
- **CPU:** ARM Cortex-A76 4x2.4GHz,Cortex-A53 4x1.8GHz, RK3588
- **RAM:** 4GB/8GB/16GB LPDDR4X
- **Flash:** 32GB/64GB eMMC
- **USB:** USB 3.0,2x USB 2.0,USB-C
- **Power:** 12V DC via barrel jack
- **Dimensions:** 110 × 80mm

## Connectivity

Ethernet 2x 2.5 Gigabit

## Compatible Firmware

- arduino

## Components

- **RK3588** (mcu): Rockchip RK3588 with 4x Cortex-A76 + 4x Cortex-A53, Mali-G610 MP4, 6 TOPS NPU, 8K video. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fuploads%2Fpdf%2F2022.8.26%2F192%2FRK3588%2520Brief%2520Datasheet.pdf&ref=openhardware.directory&product=nanopc-t6-lts&source=md-export)

## Protocols

- **SPI**: notes=Via 40-pin GPIO
- **I2C**: notes=Via 40-pin GPIO
- **UART**: notes=6x UART via GPIO + debug

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | Digital I/O | — | digital-input, digital-output |
| GPIO2 | SPI/UART | — | digital-input, digital-output |
| GPIO3 | I2C | — | digital-input, digital-output |
| GPIO4 | PWM | — | digital-input, digital-output, pwm |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D292&ref=openhardware.directory&product=nanopc-t6-lts&source=md-export) — $147.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D292&ref=openhardware.directory&product=nanopc-t6-lts&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPC-T6&ref=openhardware.directory&product=nanopc-t6-lts&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Ffriendlyarm%2Fsd-fuse_rk3588&ref=openhardware.directory&product=nanopc-t6-lts&source=md-export)

## Tags

`friendlyelec`, `nanopc`, `rk3588`, `sbc`, `lts`, `nvme`, `2.5gbe`, `npu`

---
[View full device page](https://openhardware.directory/s/1370/nanopc-t6-lts)

---

# BigTreeTech Octopus Pro V1.1

> High-voltage 3D printer control board with STM32H723ZE MCU, 8 stepper driver slots supporting up to 60V motor power, CAN bus, PT100/PT1000 support, and Marlin/Klipper/RRF firmware.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$49.86
- **CPU:** STM32H723ZET6
- **RAM:** 564KB
- **Flash:** 1MB
- **USB:** USB Type-C
- **Power:** DC 15V–28V (main); DC 12–60V (motor power)
- **Dimensions:** 160 x 100 mm

## Compatible Firmware

- Marlin
- Klipper
- RepRapFirmware

## Components

- **STM32H723ZET6** (mcu): STMicroelectronics ARM Cortex-M7 at 550MHz, 1MB Flash, 564KB SRAM with DSP and FPU. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32h723ze.pdf&ref=openhardware.directory&product=bigtreetech-octopus-pro-v1-1&source=md-export)
- **MAX31865** (temperature-sensor): Maxim MAX31865 RTD-to-digital converter supporting PT100 and PT1000 resistance temperature detectors. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.maximintegrated.com%2Fen%2Fds%2FMAX31865.pdf&ref=openhardware.directory&product=bigtreetech-octopus-pro-v1-1&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**
- **CAN bus**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-octopus-pro-v1-0-chip-f446&ref=openhardware.directory&product=bigtreetech-octopus-pro-v1-1&source=md-export) — $49.86

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBIGTREETECH-OCTOPUS-Pro&ref=openhardware.directory&product=bigtreetech-octopus-pro-v1-1&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-octopus-pro-v1-0-chip-f446&ref=openhardware.directory&product=bigtreetech-octopus-pro-v1-1&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.bttwiki.com%2FOctopus%2520Pro.html&ref=openhardware.directory&product=bigtreetech-octopus-pro-v1-1&source=md-export)

## Tags

`3d-printer`, `control-board`, `stm32`, `stm32h723`, `marlin`, `klipper`, `reprapfirmware`, `high-voltage`, `stepper-driver`, `can-bus`, `pt100`, `bigtreetech`, `open-source`, `cortex-m7`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-octopus-pro-v1-1)

---

# BigTreeTech SKRat V1.0

> Compact 32-bit 3D printer control board with STM32G0B1VET6 MCU, 5 stepper driver slots, CAN-FD bus, USB-C, and support for both Marlin and Klipper firmware.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$39
- **CPU:** STM32G0B1VET6
- **RAM:** 144KB
- **Flash:** 512KB
- **USB:** USB Type-C
- **Power:** DC 12V–24V
- **Dimensions:** 110 x 85 mm

## Compatible Firmware

- Marlin
- Klipper

## Components

- **STM32G0B1VET6** (mcu): STMicroelectronics 32-bit ARM Cortex-M0+ at 64MHz, 512KB Flash, 144KB SRAM with USB, CAN-FD, UART, and SPI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32g0b1re.pdf&ref=openhardware.directory&product=bigtreetech-skrat-v1-0&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**
- **CAN-FD**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreeetech-skrat-v1-0-control-board&ref=openhardware.directory&product=bigtreetech-skrat-v1-0&source=md-export) — $39.00

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FSKRat&ref=openhardware.directory&product=bigtreetech-skrat-v1-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreeetech-skrat-v1-0-control-board&ref=openhardware.directory&product=bigtreetech-skrat-v1-0&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fglobal.bttwiki.com%2FSKRat.html&ref=openhardware.directory&product=bigtreetech-skrat-v1-0&source=md-export)

## Tags

`3d-printer`, `control-board`, `stm32`, `stm32g0`, `marlin`, `klipper`, `stepper-driver`, `can-fd`, `compact`, `bigtreetech`, `open-source`, `cortex-m0+`, `skrat`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-skrat-v1-0)

---

# BigTreeTech EBB 36/42 CAN Bus Toolhead Board

> CAN bus toolhead board for 36/42mm stepper extruders. Features STM32G0B1 MCU, onboard TMC2209, ADXL345 accelerometer, PT100/PT1000 support, and USB/CAN connectivity for Klipper 3D printers.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Toolhead Board
- **Price:** ~$17.59
- **CPU:** STM32G0B1CBT6
- **RAM:** 144KB
- **Flash:** 128KB
- **USB:** USB Type-C
- **Power:** DC 12V-24V 6A

## Compatible Firmware

- Klipper

## Components

- **TMC2209** (stepper-driver): Onboard TMC2209 in UART mode, Rsense 0.11R, address 00 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FTMC2209_datasheet_rev1.09.pdf&ref=openhardware.directory&product=bigtreetech-ebb-36-42-can-bus-toolhead-board&source=md-export)
- **ADXL345** (accelerometer): Onboard ADXL345 for Klipper resonance compensation / input shaping — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FADXL345.pdf&ref=openhardware.directory&product=bigtreetech-ebb-36-42-can-bus-toolhead-board&source=md-export)
- **MAX31865** (temperature-ic): Onboard MAX31865 for PT100/PT1000 RTD support, selectable via DIP switch — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FMAX31865.pdf&ref=openhardware.directory&product=bigtreetech-ebb-36-42-can-bus-toolhead-board&source=md-export)
- **100K NTC** (thermistor): 1x NTC 100K or PT1000 thermistor input (TH0) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.vishay.com%2Fdocs%2F29049%2Fntcle100.pdf&ref=openhardware.directory&product=bigtreetech-ebb-36-42-can-bus-toolhead-board&source=md-export)
- **Dual CNC Fan Output** (fan-output): FAN0 and FAN1 CNC fan ports, 1A rated (1.5A peak) each, 2-pin JST — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FEBB%2Fblob%2Fmaster%2FREADME.md&ref=openhardware.directory&product=bigtreetech-ebb-36-42-can-bus-toolhead-board&source=md-export)
- **Hotend Heater Output** (heater-output): E0 hotend heater output, 5A maximum — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FEBB%2Fblob%2Fmaster%2FREADME.md&ref=openhardware.directory&product=bigtreetech-ebb-36-42-can-bus-toolhead-board&source=md-export)

## Protocols

- **CAN Bus**
- **USB**
- **UART**
- **SPI**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-ebb-36-42-can-bus-for-bigtreetech-ebb-36-42-can-bus-u2c-v2-1-for-connecting-klipper-expansion-device-support-pt1000connecting-klipper-expansion-device&ref=openhardware.directory&product=bigtreetech-ebb-36-42-can-bus-toolhead-board&source=md-export) — $17.59

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FEBB&ref=openhardware.directory&product=bigtreetech-ebb-36-42-can-bus-toolhead-board&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-ebb-36-42-can-bus-for-bigtreetech-ebb-36-42-can-bus-u2c-v2-1-for-connecting-klipper-expansion-device-support-pt1000connecting-klipper-expansion-device&ref=openhardware.directory&product=bigtreetech-ebb-36-42-can-bus-toolhead-board&source=md-export)

## Tags

`can-bus`, `toolhead-board`, `klipper`, `3d-printing`, `stm32`, `tmc2209`, `adxl345`, `bigtreetech`, `ebb36`, `ebb42`, `fdcan`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-ebb-36-42-can-bus-toolhead-board)

---

# BigTreeTech ADXL345 V2.0 Accelerometer Board

> RP2040-based ADXL345 accelerometer board for Klipper input shaping and resonance compensation on 3D printers. Connects via USB Type-C with ESD protection. Board size: 33.25 × 15.5mm.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** sensor-module
- **Price:** ~$9.99
- **CPU:** RP2040
- **RAM:** 264KB
- **Flash:** 2MB
- **USB:** USB Type-C 2.0
- **Power:** 5V via USB Type-C
- **Dimensions:** 33.25 × 15.5mm

## Compatible Firmware

- Klipper

## Components

- **ADXL345** (sensor): 3-axis digital accelerometer with up to ±16g range and 4-wire SPI interface, used for resonance measurement — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.analog.com%2Fmedia%2Fen%2Ftechnical-documentation%2Fdata-sheets%2FADXL345.pdf&ref=openhardware.directory&product=bigtreetech-adxl345-v2-0-accelerometer-board&source=md-export)

## Protocols

- **SPI**
- **USB 2.0**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fadxl-345-accelerometer-board-for-36-stepper-motors&ref=openhardware.directory&product=bigtreetech-adxl345-v2-0-accelerometer-board&source=md-export) — $9.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FADXL345&ref=openhardware.directory&product=bigtreetech-adxl345-v2-0-accelerometer-board&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fadxl-345-accelerometer-board-for-36-stepper-motors&ref=openhardware.directory&product=bigtreetech-adxl345-v2-0-accelerometer-board&source=md-export)

## Tags

`adxl345`, `accelerometer`, `klipper`, `input-shaping`, `rp2040`, `3d-printer`, `bigtreetech`, `open-source`, `resonance-compensation`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-adxl345-v2-0-accelerometer-board)

---

# BigTreeTech MicroProbe V2.0

> Compact automatic bed leveling probe for 3D printers including Ender-3, B1, and H2 extruder platforms. Supports Voron Stealthburner, EVA, and other popular toolhead mounts. Open source hardware.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** sensor-module
- **Price:** ~$18.99
- **CPU:** ATtiny13A (probe control MCU)
- **RAM:** 64B
- **Flash:** 1KB
- **USB:** No
- **Power:** 5V via mainboard probe connector

## Compatible Firmware

- Klipper
- Marlin

## Components

- **Servo-Actuated Probe** (probe): Servo-actuated probe tip for automatic bed leveling and Z-offset calibration, compatible with PNP and NPN signal — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FMicroProbe&ref=openhardware.directory&product=bigtreetech-microprobe-v2-0&source=md-export)

## Protocols

- **Digital I/O**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fmicroprobe-v1-0-for-b1-printers-h2-extruders-ender-3&ref=openhardware.directory&product=bigtreetech-microprobe-v2-0&source=md-export) — $18.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FMicroProbe&ref=openhardware.directory&product=bigtreetech-microprobe-v2-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fmicroprobe-v1-0-for-b1-printers-h2-extruders-ender-3&ref=openhardware.directory&product=bigtreetech-microprobe-v2-0&source=md-export)

## Tags

`bed-leveling`, `auto-leveling`, `probe`, `klipper`, `marlin`, `3d-printer`, `bigtreetech`, `open-source`, `ender-3`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-microprobe-v2-0)

---

# BigTreeTech BTT RRF WiFi V1.0 Module

> ESP8266-based WiFi expansion module for RepRapFirmware (Duet-style) boards. Adds wireless connectivity to BTT SKR V1.3, SKR V1.4 Turbo, and compatible boards running RRF or Marlin firmware.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** wireless-module
- **Price:** ~$14.5
- **CPU:** ESP8266 ESP-07S
- **RAM:** 80KB
- **Flash:** 4MB
- **USB:** No
- **Power:** 3.3V via mainboard WiFi expansion header

## Connectivity

WiFi 802.11 b/g/n 2.4GHz

## Compatible Firmware

- RepRapFirmware
- Marlin

## Components

- **ESP8266 ESP-07S** (wireless): Espressif ESP8266-based WiFi module with external antenna connector for improved range — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2F0a-esp8266ex_datasheet_en.pdf&ref=openhardware.directory&product=bigtreetech-btt-rrf-wifi-v1-0-module&source=md-export)

## Protocols

- **UART**
- **WiFi 802.11 b/g/n**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-btt-rrf-wifi-v1-0-module-expansion-board-3d-printer-parts-reprap-duet-firmware-for-skr-v1-3-skr-v1-4-turbo&ref=openhardware.directory&product=bigtreetech-btt-rrf-wifi-v1-0-module&source=md-export) — $14.50

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBTT-Expansion-module&ref=openhardware.directory&product=bigtreetech-btt-rrf-wifi-v1-0-module&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-btt-rrf-wifi-v1-0-module-expansion-board-3d-printer-parts-reprap-duet-firmware-for-skr-v1-3-skr-v1-4-turbo&ref=openhardware.directory&product=bigtreetech-btt-rrf-wifi-v1-0-module&source=md-export)

## Tags

`esp8266`, `wifi`, `reprapfirmware`, `duet-web-control`, `3d-printer`, `bigtreetech`, `open-source`, `skr`, `expansion-module`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-btt-rrf-wifi-v1-0-module)

---

# BigTreeTech Eddy Eddy Current Inductive Probe

> Eddy current inductive bed leveling probe for Klipper 3D printers. Offers 0.5μm precision, rapid bed mesh scanning, temperature compensation (USB), and works as Z-endstop. Mounts on standard Voron X carriage.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Expansion Board
- **Price:** ~$24.98
- **CPU:** RP2040
- **RAM:** 264KB
- **Flash:** 2MB
- **USB:** USB Type-C
- **Power:** 5V 30mA via USB

## Compatible Firmware

- Klipper

## Components

- **Eddy Current Coil** (sensor): Oscillating inductive coil for non-contact bed distance measurement with 0.5μm precision — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FEddy%2Fblob%2Fmaster%2FREADME.md&ref=openhardware.directory&product=bigtreetech-eddy-eddy-current-inductive-probe&source=md-export)

## Protocols

- **USB**
- **CAN Bus**
- **I2C**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-eddy&ref=openhardware.directory&product=bigtreetech-eddy-eddy-current-inductive-probe&source=md-export) — $24.98

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FEddy&ref=openhardware.directory&product=bigtreetech-eddy-eddy-current-inductive-probe&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-eddy&ref=openhardware.directory&product=bigtreetech-eddy-eddy-current-inductive-probe&source=md-export)

## Tags

`bed-leveling`, `inductive-probe`, `klipper`, `3d-printing`, `rp2040`, `eddy-current`, `bigtreetech`, `voron`, `bed-mesh`, `z-endstop`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-eddy-eddy-current-inductive-probe)

---

# BigTreeTech SKSM V1.0 Supercapacitor Power Module

> Supercapacitor-based power loss recovery module for Klipper 3D printers. Provides ~13 seconds of 5W backup power via dual 2.7V 20F supercaps, enabling safe shutdown on power failure.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Expansion Board
- **Price:** ~$18.99
- **CPU:** STM32 power management MCU
- **RAM:** 20KB
- **Flash:** 64KB
- **USB:** USB Type-C
- **Power:** DC 12V-24V input
- **Dimensions:** 40.8x32.9mm

## Compatible Firmware

- Klipper

## Components

- **2x 2.7V 20F Supercapacitor** (capacitor): Two 2.7V 20F supercapacitors providing energy backup for power loss recovery — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2Fdatasheet%2F2%2F257%2Fmec_s_a0003436001_1-2529526.pdf&ref=openhardware.directory&product=bigtreetech-sksm-v1-0-supercapacitor-power-module&source=md-export)
- **XH2.54mm 5-pin Signal Cable** (connector): 5-pin signal cable connecting to mainboard for power loss detection (PB0) and reset (PB1, PB2) signals — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.jst.com%2Fwp-content%2Fuploads%2F2021%2F01%2FeXH.pdf&ref=openhardware.directory&product=bigtreetech-sksm-v1-0-supercapacitor-power-module&source=md-export)

## Protocols

- **USB**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-sksm-v1-0&ref=openhardware.directory&product=bigtreetech-sksm-v1-0-supercapacitor-power-module&source=md-export) — $18.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FSKSM&ref=openhardware.directory&product=bigtreetech-sksm-v1-0-supercapacitor-power-module&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-sksm-v1-0&ref=openhardware.directory&product=bigtreetech-sksm-v1-0-supercapacitor-power-module&source=md-export)

## Tags

`power-module`, `supercapacitor`, `power-loss-recovery`, `klipper`, `3d-printing`, `bigtreetech`, `sksm`, `ups`, `backup-power`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-sksm-v1-0-supercapacitor-power-module)

---

# BigTreeTech CEB CAN Expansion Board

> CAN bus power distribution and expansion board for BigTreeTech toolhead boards. Provides multiple 24V + CAN pass-through ports to daisy-chain toolhead boards in Klipper 3D printer setups.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Expansion Board
- **Price:** ~$13.99
- **CPU:** Passive (no MCU)
- **RAM:** No
- **Flash:** No
- **Power:** 24V input pass-through

## Compatible Firmware

- Klipper

## Components

- **CAN + 24V Distribution Ports** (connector): Multiple JST CAN + 24V pass-through ports for distributing CAN bus signal and power to toolhead boards — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FCEB%2Fblob%2Fmaster%2FHardware%2FCEB%2520V1.0-Pin.png&ref=openhardware.directory&product=bigtreetech-ceb-can-expansion-board&source=md-export)

## Protocols

- **CAN Bus**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-ceb&ref=openhardware.directory&product=bigtreetech-ceb-can-expansion-board&source=md-export) — $13.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FCEB&ref=openhardware.directory&product=bigtreetech-ceb-can-expansion-board&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-ceb&ref=openhardware.directory&product=bigtreetech-ceb-can-expansion-board&source=md-export)

## Tags

`can-bus`, `expansion-board`, `klipper`, `3d-printing`, `bigtreetech`, `ceb`, `power-distribution`, `can-hub`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-ceb-can-expansion-board)

---

# BigTreeTech K-Hub V1.0

> 4-port USB 2.0 hub for Klipper-based 3D printers with dual 24V/5V power input support. Expands a single USB host port to connect multiple peripherals like ADXL345, EBB boards, and cameras simultaneously.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** usb-hub
- **Price:** ~$17.99
- **CPU:** USB 2.0 Hub Controller
- **RAM:** No
- **Flash:** No
- **USB:** 4× USB-A 2.0 downstream; 1× USB upstream
- **Power:** DC 24V or 5V USB input

## Compatible Firmware

- Klipper

## Components

- **USB 2.0 Hub Controller** (hub): USB 2.0 hub controller providing 4 downstream ports from a single upstream host connection — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FK-Hub&ref=openhardware.directory&product=bigtreetech-k-hub-v1-0&source=md-export)

## Protocols

- **USB 2.0**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-k-hub-v1-0&ref=openhardware.directory&product=bigtreetech-k-hub-v1-0&source=md-export) — $17.99

## Links

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FK-Hub&ref=openhardware.directory&product=bigtreetech-k-hub-v1-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-k-hub-v1-0&ref=openhardware.directory&product=bigtreetech-k-hub-v1-0&source=md-export)

## Tags

`usb-hub`, `klipper`, `3d-printer`, `bigtreetech`, `open-source`, `usb-2-0`, `peripheral-expansion`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-k-hub-v1-0)

---

# Waveshare RP2350-One

> Ultra-compact USB-A plug-and-play development board with the Raspberry Pi RP2350A dual-architecture MCU, 4MB flash, WS2812 RGB LED, castellated module design, and 29 GPIO pins in a tiny 18 x 25.5mm form factor.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$4.99
- **CPU:** ARM Cortex-M33 / RISC-V Hazard3 dual-core @ 150MHz, FPU, DSP, TrustZone, 12 PIO state machines
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-A (USB 1.1 host/device)
- **Power:** 5V via USB-A plug
- **Dimensions:** 18 × 25.5mm

## Components

- **RP2350A** (mcu): Raspberry Pi RP2350A dual-core microcontroller with switchable ARM Cortex-M33 and Hazard3 RISC-V cores at 150MHz, 520KB SRAM, 30 GPIO, 12 PIO state machines, and TrustZone security. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2350-one&source=md-export)
- **WS2812B** (led-driver): WS2812 addressable RGB LED on GP16 providing programmable status indication and visual feedback via single-wire protocol. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812.pdf&ref=openhardware.directory&product=waveshare-rp2350-one&source=md-export)
- **RT9013-33GB** (voltage-regulator): Richtek RT9013-33GB 500mA LDO voltage regulator providing stable 3.3V power from the 5V USB supply. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.richtek.com%2Fassets%2Fproduct_file%2FRT9013%2FDS9013-18.pdf&ref=openhardware.directory&product=waveshare-rp2350-one&source=md-export)
- **W25Q32JVSSIQ** (flash-memory): Winbond W25Q32JVSSIQ 4MB serial NOR flash memory storing firmware and user data via SPI/Quad-SPI interface. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.winbond.com%2Fresource-files%2Fw25q32jv%2520revj%252005302016.pdf&ref=openhardware.directory&product=waveshare-rp2350-one&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GP0 | SPI0 RX / I2C0 SDA / UART0 TX | — | digital-input, digital-output, pwm |
| GP1 | SPI0 CSn / I2C0 SCL / UART0 RX | — | digital-input, digital-output, pwm |
| GP2 | SPI0 SCK / I2C1 SDA | — | digital-input, digital-output, pwm |
| GP3 | SPI0 TX / I2C1 SCL | — | digital-input, digital-output, pwm |
| GP4 | SPI0 RX / I2C0 SDA / UART1 TX | — | digital-input, digital-output, pwm |
| GP5 | SPI0 CSn / I2C0 SCL / UART1 RX | — | digital-input, digital-output, pwm |
| GP6 | SPI0 SCK | — | digital-input, digital-output, pwm |
| GP7 | SPI0 TX | — | digital-input, digital-output, pwm |
| GP8 | SPI1 RX / I2C0 SDA / UART1 TX | — | digital-input, digital-output, pwm |
| GP9 | SPI1 CSn / I2C0 SCL / UART1 RX | — | digital-input, digital-output, pwm |
| GP10 | SPI1 SCK / I2C1 SDA | — | digital-input, digital-output, pwm |
| GP11 | SPI1 TX / I2C1 SCL | — | digital-input, digital-output, pwm |
| GP12 | SPI1 RX / I2C0 SDA / UART0 TX | — | digital-input, digital-output, pwm |
| GP13 | SPI1 CSn / I2C0 SCL / UART0 RX | — | digital-input, digital-output, pwm |
| GP14 | I2C1 SDA / SPI1 SCK | — | digital-input, digital-output, pwm |
| GP15 | I2C1 SCL / SPI1 TX | — | digital-input, digital-output, pwm |
| GP16 | WS2812 DIN (onboard RGB LED) | — | digital-input, digital-output, pwm |
| GP17 | SPI0 CSn / I2C0 SCL / UART0 RX | — | digital-input, digital-output, pwm |
| GP18 | SPI0 SCK / I2C1 SDA | — | digital-input, digital-output, pwm |
| GP19 | SPI0 TX / I2C1 SCL | — | digital-input, digital-output, pwm |
| GP20 | I2C0 SDA | — | digital-input, digital-output, pwm |
| GP21 | I2C0 SCL | — | digital-input, digital-output, pwm |
| GP22 | General GPIO | — | digital-input, digital-output, pwm |
| GP23 | General GPIO | — | digital-input, digital-output, pwm |
| GP24 | General GPIO | — | digital-input, digital-output, pwm |
| GP25 | General GPIO | — | digital-input, digital-output, pwm |
| GP26 | ADC0 | — | digital-input, digital-output, adc |
| GP27 | ADC1 | — | digital-input, digital-output, adc |
| GP28 | ADC2 | — | digital-input, digital-output, adc |
| GP29 | ADC3 | — | digital-input, digital-output, adc |

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2350-one.htm&ref=openhardware.directory&product=waveshare-rp2350-one&source=md-export) — 4.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2350-one.htm&ref=openhardware.directory&product=waveshare-rp2350-one&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRP2350-One&ref=openhardware.directory&product=waveshare-rp2350-one&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2350-one&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FRP2350-One%2FRP2350_One_Schematic.pdf&ref=openhardware.directory&product=waveshare-rp2350-one&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-rp2350-one)

---

# DFRobot W5500 Ethernet PoE Board

> Arduino Leonardo-compatible IoT board with WIZnet W5500 hardwired TCP/IP Ethernet (10/100Mbps), 802.3af PoE power input, ATmega32u4 MCU, 20 digital I/O pins, and 6 analog inputs for wired IoT applications.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** dev-board
- **Price:** ~$44.9
- **CPU:** ATmega32u4 @ 16MHz, single-core AVR
- **RAM:** 2KB SRAM
- **Flash:** 32KB (4KB bootloader)
- **USB:** Micro-USB
- **Power:** 7-20V DC or 48V PoE (802.3af)
- **Dimensions:** 73.5 x 53.5 x 15mm

## Connectivity

Ethernet 10/100 Mbps (W5500)

## Components

- **ATmega32u4** (mcu): Atmel ATmega32u4 8-bit AVR microcontroller at 16MHz with 32KB flash, 2KB SRAM, 1KB EEPROM, and native USB. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2Fdevicedoc%2Fatmel-7766-8-bit-avr-atmega16u4-32u4_datasheet.pdf&ref=openhardware.directory&product=dfrobot-w5500-ethernet-poe&source=md-export)
- **W5500** (ethernet-controller): WIZnet W5500 Ethernet controller with hardwired TCP/IP stack, 10/100Mbps, 8 simultaneous sockets, SPI interface up to 80MHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FArduinolibrary%2FDFRobot_W5500_Ethernet_POE_mainboard%2Fraw%2Fmaster%2FW5500%2520datasheet.pdf&ref=openhardware.directory&product=dfrobot-w5500-ethernet-poe&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | Digital I/O / RX | — | digital-input, digital-output |
| D1 | Digital I/O / TX | — | digital-input, digital-output |
| D2 | Digital I/O | — | digital-input, digital-output |
| D3 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| D4 | Digital I/O | — | digital-input, digital-output |
| D5 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| D6 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output |
| D8 | Digital I/O | — | digital-input, digital-output |
| D9 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| D10 | Digital I/O / PWM / W5500 SS | — | digital-input, digital-output, pwm |
| D11 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| D12 | Digital I/O | — | digital-input, digital-output |
| D13 | Digital I/O / PWM | — | digital-input, digital-output, pwm |
| A0 | Analog Input | — | digital-input, digital-output, adc |
| A1 | Analog Input | — | digital-input, digital-output, adc |
| A2 | Analog Input | — | digital-input, digital-output, adc |
| A3 | Analog Input | — | digital-input, digital-output, adc |
| A4 | Analog Input | — | digital-input, digital-output, adc |
| A5 | Analog Input | — | digital-input, digital-output, adc |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1286.html&ref=openhardware.directory&product=dfrobot-w5500-ethernet-poe&source=md-export) — 44.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1286.html&ref=openhardware.directory&product=dfrobot-w5500-ethernet-poe&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FWiznet%2FWIZ_Ethernet_Library&ref=openhardware.directory&product=dfrobot-w5500-ethernet-poe&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FW5500_Ethernet_with_POE_Mainboard_SKU__DFR0342&ref=openhardware.directory&product=dfrobot-w5500-ethernet-poe&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FArduinolibrary%2FDFRobot_W5500_Ethernet_POE_mainboard%2Fraw%2Fmaster%2FW5500%2520datasheet.pdf&ref=openhardware.directory&product=dfrobot-w5500-ethernet-poe&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FArduinolibrary%2FDFRobot_W5500_Ethernet_POE_mainboard%2Fraw%2Fmaster%2FW5500%2520Schematic.pdf&ref=openhardware.directory&product=dfrobot-w5500-ethernet-poe&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-w5500-ethernet-poe)

---

# Renegade

> Libre Computer Renegade — Rockchip RK3328 SBC with up to 4GB DDR4, 32GB eMMC, USB 3.0, USB-C power, and 4K HDR output, offering strong mainline Linux support at an affordable price.

## Quick Facts

- **Brand:** Libre Computer
- **Price:** ~$45
- **CPU:** Rockchip RK3328 (Cortex-A53×4 @ 1.4GHz)
- **RAM:** 1GB / 2GB / 4GB DDR4
- **Flash:** 8GB / 16GB / 32GB eMMC
- **USB:** USB 3.0, USB 2.0×2, USB-C
- **Power:** 5V/3A USB-C

## Connectivity

Ethernet Gigabit Ethernet

## Components

- **Rockchip RK3328** (soc): Rockchip RK3328 quad-core Cortex-A53 SoC with Mali-450 GPU, 4K H.265 decode, Gigabit Ethernet PHY. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK33_Series%2F2017%2F0118%2F829.html&ref=openhardware.directory&product=libre-computer-renegade&source=md-export)

## Where to Buy

- [LoveRPi](https://openhardware.directory/r?to=https%3A%2F%2Fwww.loverpi.com%2Fproducts%2Flibre-computer-board-roc-rk3328-cc&ref=openhardware.directory&product=libre-computer-renegade&source=md-export) — $45.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flibre.computer%2Fproducts%2Froc-rk3328-cc%2F&ref=openhardware.directory&product=libre-computer-renegade&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fhub.libre.computer%2Ft%2Flibre-computer-board-roc-rk3328-cc-renegade-support-thread%2F&ref=openhardware.directory&product=libre-computer-renegade&source=md-export)

## Tags

`sbc`, `rockchip`, `rk3328`, `libre-computer`, `4k`, `linux-sbc`, `media`, `usb3`

---
[View full device page](https://openhardware.directory/s/1370/libre-computer-renegade)

---

# Rock 2A

> Radxa Rock 2A — Rockchip RK3528A SBC with up to 4GB LPDDR4X, 32GB eMMC, WiFi 5, Bluetooth 5.0, Gigabit Ethernet, and USB-C power in a compact, affordable form factor.

## Quick Facts

- **Brand:** Radxa
- **Price:** ~$15
- **CPU:** Rockchip RK3528A (Cortex-A53×4 @ 2.0GHz)
- **RAM:** 1GB / 2GB / 4GB LPDDR4X
- **Flash:** 8GB / 16GB / 32GB eMMC
- **USB:** USB 3.0, USB 2.0, USB-C OTG
- **Power:** 5V/3A USB-C

## Connectivity

WiFi 802.11ac (WiFi 5) | Bluetooth BLE 5.0 | Ethernet Gigabit Ethernet

## Components

- **Rockchip RK3528A** (soc): Rockchip RK3528A quad-core Cortex-A53 SoC with integrated Mali-450 GPU and 4K decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2023%2F0306%2F1844.html&ref=openhardware.directory&product=radxa-rock-2a&source=md-export)

## Where to Buy

- [Arace Tech](https://openhardware.directory/r?to=https%3A%2F%2Farace.tech%2Fproducts%2Fradxa-rock-2a&ref=openhardware.directory&product=radxa-rock-2a&source=md-export) — $15.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Frock2%2F2a%2F&ref=openhardware.directory&product=radxa-rock-2a&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.radxa.com%2Fen%2Frock2%2Frock2a&ref=openhardware.directory&product=radxa-rock-2a&source=md-export)

## Tags

`sbc`, `rockchip`, `rk3528a`, `radxa`, `wifi5`, `bluetooth5`, `linux-sbc`, `affordable`

---
[View full device page](https://openhardware.directory/s/1370/radxa-rock-2a)

---

# Khadas VIM4

> Amlogic A311D2 SBC with 8GB LPDDR4X, WiFi 6, HDMI 2.1 output + input, 3.2 TOPS NPU, and a 40-pin GPIO header — Khadas's flagship single-board computer for AI, media, and smart home applications.

## Quick Facts

- **Brand:** Khadas
- **Price:** ~$219.9
- **CPU:** ARM Cortex-A73 ×4 @ 2.2GHz + Cortex-A53 ×4 @ 2.0GHz
- **RAM:** 8GB LPDDR4X @ 2016MHz
- **Flash:** 32GB eMMC 5.1 + 32MB SPI Flash
- **USB:** 1× USB 3.0 Type-A, 1× USB 2.0 Type-A, 1× USB 2.0 OTG Type-C
- **Power:** 5–20V via USB-C
- **Dimensions:** 82 × 58 × 11.5mm

## Connectivity

WiFi 802.11 a/b/g/n/ac/ax (WiFi 6), 2×2 MIMO (AP6275S) | Bluetooth Bluetooth 5.1 (AP6275S) | Ethernet Gigabit Ethernet (10/100/1000M)

## Components

- **Amlogic-A311D2** (soc): Amlogic A311D2: 4× Cortex-A73 @ 2.2GHz + 4× Cortex-A53 @ 2.0GHz, Mali-G52 MP8 GPU, 3.2 TOPS NPU, 4K H.265/H.264 decode/encode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amlogic.com%2F%23Products%2F393%2Findex.html&ref=openhardware.directory&product=khadas-vim4&source=md-export)
- **AP6275S** (module): AMPAK AP6275S dual-band WiFi 6 (802.11ax) + Bluetooth 5.1 module with 2×2 MIMO and built-in PCB antenna. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ampak.com.tw%2Fupload%2FAP6275S_DS_Rev.1.0_20210903.pdf&ref=openhardware.directory&product=khadas-vim4&source=md-export)
- **Mali-G52 MP8** (gpu): ARM Mali-G52 MP8 (8EE) GPU up to 800MHz, supporting OpenGL ES 3.2, Vulkan 1.1, and OpenCL 2.0. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdeveloper.arm.com%2FProcessors%2FMali-G52&ref=openhardware.directory&product=khadas-vim4&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| Pin 3 | I2C_SDA | — | digital-input, digital-output, i2c |
| Pin 5 | I2C_SCL | — | digital-input, digital-output, i2c |
| Pin 7 | GPIO | — | digital-input, digital-output |
| Pin 8 | UART_TX | — | digital-output, uart |
| Pin 10 | UART_RX | — | digital-input, uart |
| Pin 11 | GPIO | — | digital-input, digital-output |
| Pin 12 | I2S_CLK | — | digital-output, i2s |
| Pin 13 | GPIO | — | digital-input, digital-output |
| Pin 15 | GPIO | — | digital-input, digital-output |
| Pin 16 | GPIO | — | digital-input, digital-output |
| Pin 18 | GPIO | — | digital-input, digital-output |
| Pin 19 | SPI_MOSI | — | digital-output, spi |
| Pin 21 | SPI_MISO | — | digital-input, spi |
| Pin 22 | GPIO | — | digital-input, digital-output |
| Pin 23 | SPI_CLK | — | digital-output, spi |
| Pin 24 | SPI_CSn | — | digital-output, spi |
| Pin 27 | I2C_SDA (alt) | — | digital-input, digital-output, i2c |
| Pin 28 | I2C_SCL (alt) | — | digital-input, digital-output, i2c |
| Pin 29 | GPIO | — | digital-input, digital-output |
| Pin 31 | GPIO | — | digital-input, digital-output |
| Pin 32 | PWM | — | digital-output, pwm |
| Pin 33 | PWM | — | digital-output, pwm |
| Pin 35 | I2S_SDI | — | digital-input, i2s |
| Pin 36 | GPIO | — | digital-input, digital-output |
| Pin 37 | GPIO | — | digital-input, digital-output |
| Pin 38 | I2S_SDO | — | digital-output, i2s |
| Pin 40 | I2S_SYNC | — | digital-output, i2s |

## Where to Buy

- [Khadas](https://openhardware.directory/r?to=https%3A%2F%2Fwww.khadas.com%2Fvim4&ref=openhardware.directory&product=khadas-vim4&source=md-export) — 219.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.khadas.com%2Fvim4&ref=openhardware.directory&product=khadas-vim4&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.khadas.com%2Fproducts%2Fsbc%2Fvim4%2Fstart&ref=openhardware.directory&product=khadas-vim4&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdl.khadas.com%2Fproducts%2Fvim4%2Fspecs%2Fvim4-specs.pdf&ref=openhardware.directory&product=khadas-vim4&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fkhadas&ref=openhardware.directory&product=khadas-vim4&source=md-export)

## Tags

`amlogic`, `a311d2`, `linux`, `arm`, `sbc`, `wifi6`, `npu`, `khadas`, `media`, `ai`

---
[View full device page](https://openhardware.directory/s/1370/khadas-vim4)

---

# TQ-Systems MBa8MP-RAS314

> Industrial carrier board for TQ-Systems TQMa8MPxL SOM, featuring NXP i.MX 8M Plus with quad-core Cortex-A53 + Cortex-M7, up to 4GB LPDDR4, 16GB eMMC, Gigabit Ethernet, WiFi 5, USB 3.0, and 12V DC input for industrial Linux applications.

## Quick Facts

- **Brand:** TQ-Systems
- **Board Type:** linux-sbc
- **Price:** ~$342
- **CPU:** nxp-imx8mp
- **RAM:** 2GB/4GB LPDDR4
- **Flash:** 8GB/16GB eMMC
- **USB:** USB 3.0 + USB-C
- **Power:** 12V DC

## Connectivity

WiFi 802.11ac (WiFi 5) | Bluetooth BLE 5.0 | Ethernet Gigabit

## Compatible Firmware

- armbian

## Where to Buy

- [TQ Embedded Shop](https://openhardware.directory/r?to=https%3A%2F%2Fembeddedshop.tq-group.com%2FMBa8MP-RAS314-AB%2F354658.0101&ref=openhardware.directory&product=mba8mp-ras314&source=md-export) — $342.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fmba8mp-ras314%2F&ref=openhardware.directory&product=mba8mp-ras314&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/mba8mp-ras314)

---

# LILYGO T-Lora Dual

> LILYGO T-Lora Dual is a compact board featuring dual LR1121 multi-band LoRa radios supporting both sub-GHz and 2.4 GHz bands, with ExpressLRS support for long-range RC and telemetry applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$19.04
- **CPU:** LR1121 (dual, radio processor)
- **Flash:** N/A (radio module)
- **Power:** 3.3V

## Components

- **LR1121** (radio): Semtech LR1121 multi-band LoRa transceiver supporting sub-GHz (830–940 MHz) and 2.4 GHz bands with LoRa and GFSK modulation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2Fds_lr1121.pdf&ref=openhardware.directory&product=lilygo-t-lora-dual&source=md-export)
- **LR1121 #2** (radio): Second Semtech LR1121 multi-band LoRa transceiver enabling dual concurrent radio operation for full-duplex or multi-band applications — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2Fds_lr1121.pdf&ref=openhardware.directory&product=lilygo-t-lora-dual&source=md-export)

## Protocols

- **SPI**
- **GPIO**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-lora-dual&ref=openhardware.directory&product=lilygo-t-lora-dual&source=md-export) — $19.04

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-lora-dual&ref=openhardware.directory&product=lilygo-t-lora-dual&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Lora-Dual&ref=openhardware.directory&product=lilygo-t-lora-dual&source=md-export)

## Tags

`lr1121`, `lora`, `dual-radio`, `expresslrs`, `sub-ghz`, `2.4ghz`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-lora-dual)

---

# Holybro Pixhawk 6C

> Open-source flight controller based on the Pixhawk FMUv6C standard. Features STM32H743 processor, dual redundant IMUs, barometer, and magnetometer. Runs ArduPilot or PX4 autopilot firmware.

## Quick Facts

- **Brand:** Holybro
- **Board Type:** flight-controller
- **Price:** ~$140.99
- **CPU:** STM32H743
- **RAM:** 1MB
- **Flash:** 2MB
- **USB:** USB-C
- **Power:** 4.75-6V

## Compatible Firmware

- ardupilot
- px4

## Components

- **STM32H743** (MCU): 32-bit ARM Cortex-M7 @ 480MHz, 2MB flash, 1MB SRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32h743vi.pdf&ref=openhardware.directory&product=holybro-pixhawk-6c&source=md-export)
- **STM32F103** (MCU): IO co-processor, ARM Cortex-M3 @ 72MHz, 64KB SRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32f103c8.pdf&ref=openhardware.directory&product=holybro-pixhawk-6c&source=md-export)
- **ICM-42688-P** (IMU): 6-axis accelerometer and gyroscope — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fwp-content%2Fuploads%2F2020%2F04%2Fds-000347_icm-42688-p-datasheet.pdf&ref=openhardware.directory&product=holybro-pixhawk-6c&source=md-export)
- **BMI088** (IMU): 6-axis accelerometer and gyroscope (redundant) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bmi088-ds001.pdf&ref=openhardware.directory&product=holybro-pixhawk-6c&source=md-export)
- **IST8310** (Magnetometer): 3-axis digital magnetometer for compass heading — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fintofpv.com%2Fattachment.php%3Faid%3D8104&ref=openhardware.directory&product=holybro-pixhawk-6c&source=md-export)
- **MS5611** (Barometer): High-resolution barometric pressure sensor for altitude estimation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.te.com%2Fcommerce%2FDocumentDelivery%2FDDEController%3FAction%3Dshowdoc%26DocId%3DData%2BSheet%257FMS5611-01BA03%257FB3%257Fpdf%257FEnglish%257FENG_DS_MS5611-01BA03_B3.pdf&ref=openhardware.directory&product=holybro-pixhawk-6c&source=md-export)

## Protocols

- **UART**
- **I2C**
- **SPI**
- **CAN**
- **PWM**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Holybro Official](https://openhardware.directory/r?to=https%3A%2F%2Fholybro.com%2Fproducts%2Fpixhawk-6c&ref=openhardware.directory&product=holybro-pixhawk-6c&source=md-export) — $140.99
- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fpixhawk-6c&ref=openhardware.directory&product=holybro-pixhawk-6c&source=md-export) — €245.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fholybro.com%2Fproducts%2Fpixhawk-6c&ref=openhardware.directory&product=holybro-pixhawk-6c&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FPX4%2FPX4-Autopilot&ref=openhardware.directory&product=holybro-pixhawk-6c&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.px4.io%2Fmain%2Fen%2Fflight_controller%2Fpixhawk6c.html&ref=openhardware.directory&product=holybro-pixhawk-6c&source=md-export)

## Tags

`pixhawk`, `flight-controller`, `drone`, `autopilot`, `fmuv6c`, `holybro`, `px4`, `ardupilot`, `open-source`

---
[View full device page](https://openhardware.directory/s/1370/holybro-pixhawk-6c)

---

# SLAMTEC RPLiDAR A1

> 360-degree 2D laser scanner with 12m range and 8000 samples per second. Widely used for ROS robotics, SLAM mapping, and autonomous navigation applications.

## Quick Facts

- **Brand:** SLAMTEC
- **Board Type:** sensor-module
- **Price:** ~$99
- **CPU:** Embedded MCU (proprietary)
- **RAM:** N/A (proprietary)
- **Flash:** N/A (proprietary firmware)
- **Power:** 5V via USB or UART adapter

## Components

- **Laser Rangefinder** (sensor): Infrared laser triangulation rangefinder providing 12m range at 8000 samples/sec for 2D point cloud generation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.slamtec.com%2Fen%2FLidar%2FA1Spec&ref=openhardware.directory&product=slamtec-rplidar-a1&source=md-export)
- **Brushless DC Motor** (motor): Brushless DC motor that spins the laser assembly at 5.5Hz for full 360-degree scanning, speed adjustable via PWM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.slamtec.com%2Fen%2FLidar%2FA1Spec&ref=openhardware.directory&product=slamtec-rplidar-a1&source=md-export)

## Protocols

- **UART**
- **USB**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwaveshare-slamtec-rplidar-a1-laser-sensor&ref=openhardware.directory&product=slamtec-rplidar-a1&source=md-export) — $99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.slamtec.com%2Fen%2FLidar%2FA1&ref=openhardware.directory&product=slamtec-rplidar-a1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FSlamtec%2Frplidar_ros&ref=openhardware.directory&product=slamtec-rplidar-a1&source=md-export)
- [datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.slamtec.com%2Fen%2Flidar%2Fa1spec&ref=openhardware.directory&product=slamtec-rplidar-a1&source=md-export)

## Tags

`lidar`, `laser-scanner`, `slam`, `ros`, `robotics`, `360-degree`, `rangefinder`

---
[View full device page](https://openhardware.directory/s/1370/slamtec-rplidar-a1)

---

# DFRobot Solar Power Manager for 12V Lead-Acid Battery

> DFRobot solar energy harvesting and battery management module with MPPT for 12V lead-acid batteries. Designed for outdoor IoT deployments, environmental monitoring stations, and off-grid solar-powered systems.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** module
- **Price:** ~$29.88
- **CPU:** N/A (power management module)
- **RAM:** N/A
- **Flash:** N/A
- **Power:** Solar panel 15-18V input

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fdfrobot-solar-power-manager&ref=openhardware.directory&product=dfrobot-solar-power-manager&source=md-export) — $29.88

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1795.html&ref=openhardware.directory&product=dfrobot-solar-power-manager&source=md-export)

## Tags

`solar`, `power-management`, `mppt`, `lead-acid`, `dfrobot`, `outdoor-iot`

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-solar-power-manager)

---

# DFRobot Maqueen Plus V3

> Advanced micro:bit STEM robot with 8x8 matrix laser ranging, 5 line-tracking sensors with intersection recognition, magnetic encoders, PID control, and 6 RGB LEDs. Programmable via MakeCode and MicroPython.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** robot
- **Price:** ~$69.9
- **CPU:** Nordic nRF52833 (via micro:bit)
- **RAM:** 128KB
- **Flash:** 512KB
- **Power:** AA batteries (2.4-3.0V) or 18650 (3.5-4.2V)

## Connectivity

Bluetooth BLE (via micro:bit)

## Compatible Firmware

- MakeCode
- micropython
- Mind+

## Components

- **TMF8821 Matrix Laser Ranging** (Sensor): Time-of-flight matrix laser ranging sensor with 64-point depth sensing, 20-4000mm range, ±11mm accuracy at close range, 60° FOV, and 60Hz update rate — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fams.com%2Ftmf8820-tmf8821-tmf8828&ref=openhardware.directory&product=dfrobot-maqueen-plus-v3&source=md-export)
- **5-Channel Line Tracker** (Sensor): 5-channel line-tracking sensor array with digital and analog output, dedicated calibration button, and built-in recognition for 4 intersection types — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_MBT0050-AA&ref=openhardware.directory&product=dfrobot-maqueen-plus-v3&source=md-export)
- **Ambient Light Sensors** (Sensor): Two analog light sensors with 0-1023 data range for ambient light detection — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_MBT0050-AA&ref=openhardware.directory&product=dfrobot-maqueen-plus-v3&source=md-export)
- **IR Receiver** (Sensor): Infrared receiver for remote control functionality using standard IR protocols — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_MBT0050-AA&ref=openhardware.directory&product=dfrobot-maqueen-plus-v3&source=md-export)
- **N20 Metal Geared Motor** (Motor): Two detachable N20 metal geared motors with independent 5V voltage regulation for reliable drive performance — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_MBT0050-AA&ref=openhardware.directory&product=dfrobot-maqueen-plus-v3&source=md-export)
- **Magnetic Induction Encoder** (Encoder): Two magnetic induction encoders with 4-line resolution enabling PID-controlled precise distance and angle management — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_MBT0050-AA&ref=openhardware.directory&product=dfrobot-maqueen-plus-v3&source=md-export)
- **WS2812 RGB LEDs** (LED): 4x WS2812 full-spectrum ambient RGB LEDs plus 2x programmable RGB headlights for visual feedback and light effects — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812.pdf&ref=openhardware.directory&product=dfrobot-maqueen-plus-v3&source=md-export)
- **Buzzer** (Audio): Onboard buzzer for audio feedback, alarms, and simple melody playback — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_MBT0050-AA&ref=openhardware.directory&product=dfrobot-maqueen-plus-v3&source=md-export)

## Protocols

- **I2C**
- **UART**
- **USB**
- **GPIO**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenElab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fdfrobot-maqueen-plusv3-stem-robot&ref=openhardware.directory&product=dfrobot-maqueen-plus-v3&source=md-export) — $69.90
- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2935.html&ref=openhardware.directory&product=dfrobot-maqueen-plus-v3&source=md-export) — $69.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2935.html&ref=openhardware.directory&product=dfrobot-maqueen-plus-v3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FSKU_MBT0050_Maqueen_Plus_V3&ref=openhardware.directory&product=dfrobot-maqueen-plus-v3&source=md-export)

## Tags

`micro-bit`, `stem`, `line-following`, `laser-ranging`, `education`, `pid-control`, `encoders`, `rgb-led`, `dfrobot`

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-maqueen-plus-v3)

---

# DFRobot Pan-Tilt HAT

> 2-axis servo-driven pan-tilt platform HAT for Raspberry Pi and NVIDIA Jetson Nano, ideal for camera tracking, FPV, and robotics head movement projects.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** module
- **Price:** ~$21.95
- **CPU:** N/A (mechanical servo module)
- **RAM:** N/A
- **Flash:** N/A
- **Power:** 5V DC

## Components

- **Pan Servo** (Actuator): Horizontal rotation servo for 180-degree pan movement — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fdfrobot-pan-tilt-hat&ref=openhardware.directory&product=dfrobot-pan-tilt-hat&source=md-export)
- **Tilt Servo** (Actuator): Vertical rotation servo for tilt movement — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fdfrobot-pan-tilt-hat&ref=openhardware.directory&product=dfrobot-pan-tilt-hat&source=md-export)

## Protocols

- **PWM**
- **I2C**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fdfrobot-pan-tilt-hat&ref=openhardware.directory&product=dfrobot-pan-tilt-hat&source=md-export) — $21.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-2198.html&ref=openhardware.directory&product=dfrobot-pan-tilt-hat&source=md-export)

## Tags

`pan-tilt`, `servo`, `raspberry-pi`, `camera`, `robotics`, `dfrobot`, `hat`

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-pan-tilt-hat)

---

# M5Stack GPS Module V2.1

> ATGM336H-based GPS/GNSS module supporting GPS, BeiDou, Galileo, GLONASS with external active antenna, DIP switch for TX/RX config, and PPS output.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** module
- **Price:** ~$21.9
- **CPU:** AT6668 GNSS SoC
- **RAM:** N/A
- **Flash:** N/A
- **Power:** 5V DC
- **Dimensions:** 54.0 x 63.6 x 13.1 mm

## Components

- **ATGM336H** (GNSS Receiver): 50-channel GNSS receiver supporting GPS, BeiDou, Galileo, GLONASS, and QZSS with <1.5m accuracy and up to 10Hz update rate — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.icofchina.com%2Fd%2Ffile%2Fxiazai%2F2022-12-19%2FATGM336H-5N-7X%2520Specification.pdf&ref=openhardware.directory&product=m5stack-gps-module-v21&source=md-export)
- **External Active GPS Antenna** (Antenna): External active GPS antenna operating at 1555-1580MHz with 1m cable and SMA connector — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fgps-module-v2-1-with-antenna-atgm336h&ref=openhardware.directory&product=m5stack-gps-module-v21&source=md-export)
- **Super Capacitor** (Capacitor): 20000uF 3.3V super capacitor providing power backup for fast hot start (1 second) satellite acquisition — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fgps-module-v2-1-with-antenna-atgm336h&ref=openhardware.directory&product=m5stack-gps-module-v21&source=md-export)

## Protocols

- **UART**
- **NMEA0183**

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stack-gps-module-v2-1-atgm336h&ref=openhardware.directory&product=m5stack-gps-module-v21&source=md-export) — $21.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stack-gps-module-v2-1-atgm336h&ref=openhardware.directory&product=m5stack-gps-module-v21&source=md-export)

## Tags

`gps`, `gnss`, `navigation`, `location`, `m5stack`, `module`, `atgm336h`, `positioning`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-gps-module-v21)

---

# Holybro Pixhawk 4

> Open-source flight controller based on the Pixhawk FMUv5 standard. Features STM32F765 processor at 216MHz, triple redundant IMUs, barometer, and magnetometer. Runs ArduPilot or PX4 autopilot firmware.

## Quick Facts

- **Brand:** Holybro
- **Board Type:** flight-controller
- **Price:** ~$124.99
- **CPU:** STM32F765
- **RAM:** 512KB SRAM
- **Flash:** 2MB
- **USB:** USB-C
- **Power:** 4.9-5.5V via power module
- **Dimensions:** 44x84x12mm

## Compatible Firmware

- ardupilot
- px4

## Components

- **STM32F765** (MCU): 32-bit ARM Cortex-M7 @ 216MHz, 2MB flash, 512KB SRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32f765vi.pdf&ref=openhardware.directory&product=holybro-pixhawk-4&source=md-export)
- **STM32F100** (MCU): IO co-processor, ARM Cortex-M3 @ 24MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32f100cb.pdf&ref=openhardware.directory&product=holybro-pixhawk-4&source=md-export)
- **ICM-20689** (IMU): 6-axis accelerometer and gyroscope — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fwp-content%2Fuploads%2F2016%2F06%2FDS-000143-ICM-20689-v2.1.pdf&ref=openhardware.directory&product=holybro-pixhawk-4&source=md-export)
- **BMI055** (IMU): 6-axis accelerometer and gyroscope (redundant) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.bosch-sensortec.com%2Fmedia%2Fboschsensortec%2Fdownloads%2Fdatasheets%2Fbst-bmi055-ds000.pdf&ref=openhardware.directory&product=holybro-pixhawk-4&source=md-export)
- **IST8310** (Magnetometer): 3-axis digital magnetometer for compass heading — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fintofpv.com%2Fattachment.php%3Faid%3D8104&ref=openhardware.directory&product=holybro-pixhawk-4&source=md-export)
- **MS5611** (Barometer): High-resolution barometric pressure sensor for altitude estimation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.te.com%2Fcommerce%2FDocumentDelivery%2FDDEController%3FAction%3Dshowdoc%26DocId%3DData%2BSheet%257FMS5611-01BA03%257FB3%257Fpdf%257FEnglish%257FENG_DS_MS5611-01BA03_B3.pdf&ref=openhardware.directory&product=holybro-pixhawk-4&source=md-export)

## Protocols

- **UART**
- **I2C**
- **SPI**
- **CAN**
- **PWM**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Holybro Official](https://openhardware.directory/r?to=https%3A%2F%2Fholybro.com%2Fproducts%2Fpixhawk-4&ref=openhardware.directory&product=holybro-pixhawk-4&source=md-export) — $124.99
- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fpixhawk-4&ref=openhardware.directory&product=holybro-pixhawk-4&source=md-export) — €219.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fholybro.com%2Fproducts%2Fpixhawk-4&ref=openhardware.directory&product=holybro-pixhawk-4&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FPX4%2FPX4-Autopilot&ref=openhardware.directory&product=holybro-pixhawk-4&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.px4.io%2Fmain%2Fen%2Fflight_controller%2Fholybro_pixhawk4.html&ref=openhardware.directory&product=holybro-pixhawk-4&source=md-export)

## Tags

`pixhawk`, `flight-controller`, `drone`, `autopilot`, `fmuv5`, `holybro`, `px4`, `ardupilot`, `open-source`, `stm32`

---
[View full device page](https://openhardware.directory/s/1370/holybro-pixhawk-4)

---

# LuckFox Pico Mini

> Tiny Linux SBC (28x21mm) based on Rockchip RV1103 with ARM Cortex-A7 @ 1.2GHz, RISC-V MCU, 0.5 TOPS NPU, 64MB DDR2, MIPI CSI camera, 17 GPIO pins, and castellated-hole design for direct soldering.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** linux-sbc
- **Price:** ~$8.99
- **CPU:** Rockchip RV1103
- **RAM:** 64MB DDR2
- **Flash:** microSD (TF)
- **GPIO:** 17 pins
- **USB:** USB-C 2.0
- **Power:** 5V
- **Dimensions:** 28 x 21mm

## Compatible Firmware

- buildroot

## Components

- **RV1103** (soc): ARM Cortex-A7 @ 1.2GHz + RISC-V MCU + 0.5 TOPS NPU + ISP 3.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.luckfox.com%2Fwiki%2FLuckfox-Pico%2FPDF%2FRockchip%2520RV1103%2520Datasheet%2520V1.1-20220427.pdf&ref=openhardware.directory&product=luckfox-pico-mini&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **PWM**
- **ADC**
- **MIPI CSI**
- **USB 2.0**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fraspberry-pi%2Fboards-kits%2Fraspberry-pi-pico-cat%2Fluckfox-pico-min.htm&ref=openhardware.directory&product=luckfox-pico-mini&source=md-export) — $8.99

## Available Software

- [LuckFox Pico SDK](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-pico-mini&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.luckfox.com%2FLuckfox-Pico-Mini-A&ref=openhardware.directory&product=luckfox-pico-mini&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH%2Fluckfox-pico&ref=openhardware.directory&product=luckfox-pico-mini&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Pico-Plus-Mini&ref=openhardware.directory&product=luckfox-pico-mini&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.luckfox.com%2Fwiki%2FLuckfox-Pico%2FPDF%2FRockchip%2520RV1103%2520Datasheet%2520V1.1-20220427.pdf&ref=openhardware.directory&product=luckfox-pico-mini&source=md-export)

## Tags

`linux`, `sbc`, `rockchip`, `rv1103`, `arm`, `risc-v`, `npu`, `ai-camera`, `mipi-csi`, `castellated-holes`, `ultra-compact`, `vision-processor`

---
[View full device page](https://openhardware.directory/s/1370/luckfox-pico-mini)

---

# LuckFox Core3576 Module

> Rockchip RK3576 SO-DIMM compute module with octa-core A72+A53, 6 TOPS NPU, Mali G52 GPU, up to 8GB LPDDR4X, 64GB eMMC, triple display output (HDMI 2.1 + eDP + MIPI DSI), triple camera input, dual Gigabit Ethernet, PCIe 2.1, and 260-pin connector. Module-only for custom carrier board integration.

## Quick Facts

- **Brand:** LuckFox
- **Board Type:** module
- **Price:** ~$104.99
- **CPU:** ARM Cortex-A72 4x @ 2.2GHz + Cortex-A53 4x @ 1.8GHz, Mali G52 GPU, 6 TOPS NPU
- **RAM:** 4GB LPDDR4X
- **Flash:** 32GB eMMC
- **Power:** 5V DC
- **Dimensions:** 69.6 × 45mm

## Connectivity

WiFi WiFi 6 (802.11ax) 2.4/5GHz | Bluetooth Bluetooth 5.2 | Ethernet 2x Gigabit

## Components

- **RK3576** (soc): Rockchip RK3576 8nm SoC with 4x Cortex-A72 @ 2.2GHz + 4x Cortex-A53 @ 1.8GHz, Mali G52 MC3 GPU, 6 TOPS NPU, 16MP ISP, triple display output, triple camera input. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.luckfox.com%2Fwiki%2FOmni3576%2FPDF%2FRockchip_RK3576_Datasheet_V1.1-20240430.pdf&ref=openhardware.directory&product=waveshare-luckfox-core3576-module&source=md-export)

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fcore3576-module.htm&ref=openhardware.directory&product=waveshare-luckfox-core3576-module&source=md-export) — 104.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fproduct%2Fluckfox%2Fboards-modules%2Fcore3576-module.htm&ref=openhardware.directory&product=waveshare-luckfox-core3576-module&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FLuckfoxTECH&ref=openhardware.directory&product=waveshare-luckfox-core3576-module&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.luckfox.com%2FLuckfox-Omni3576%2FLuckfox-Omni3576-quick-start&ref=openhardware.directory&product=waveshare-luckfox-core3576-module&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.luckfox.com%2Fwiki%2FOmni3576%2FPDF%2FRockchip_RK3576_Datasheet_V1.1-20240430.pdf&ref=openhardware.directory&product=waveshare-luckfox-core3576-module&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-luckfox-core3576-module)

---

# M5Stack NanoH2

> Ultra-compact ESP32-H2 dev module with Thread 1.4, Zigbee 3.0, Matter, and BLE 5 — featuring a Grove port, IR transmitter, and RGB LED in a stamp-sized 23.5×12mm form factor.

## Quick Facts

- **Brand:** m5stack
- **Board Type:** stamp-module
- **Price:** ~$6.95
- **CPU:** RISC-V RV32IMAC single-core @ 96MHz, IEEE 802.15.4 radio, hardware secure boot
- **RAM:** 320KB SRAM
- **Flash:** 4MB
- **USB:** USB-C 2.0
- **Power:** 5V
- **Dimensions:** 23.5 × 12.0 × 9.5mm

## Connectivity

Bluetooth BLE 5 | Zigbee Zigbee 3.0

## Components

- **ESP32-H2FH4S** (mcu): Single-core RISC-V @ 96MHz with 4MB flash, IEEE 802.15.4, BLE 5, hardware secure boot, and flash encryption. Supports Thread, Zigbee, and Matter natively. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-h2_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-nanoh2&source=md-export)
- **WS2812B** (led-driver): Single WS2812 RGB LED for visual status indication, controllable via single-wire protocol. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=m5stack-nanoh2&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | IR Transmitter | — | digital-output, pwm |
| GPIO8 | WS2812 RGB LED | — | digital-output |
| GPIO0 | Grove SDA / GPIO | — | digital-input, digital-output, adc |
| GPIO1 | Grove SCL / GPIO | — | digital-input, digital-output, adc |
| GPIO4 | GPIO / ADC | — | digital-input, digital-output, adc |
| GPIO5 | GPIO / ADC | — | digital-input, digital-output, adc |
| GPIO10 | GPIO / ADC | — | digital-input, digital-output, adc, pwm |
| GPIO11 | GPIO / ADC | — | digital-input, digital-output, adc, pwm |
| GPIO12 | GPIO / SPI CLK | — | digital-input, digital-output, pwm |
| GPIO13 | GPIO / SPI MOSI | — | digital-input, digital-output, pwm |
| GPIO14 | GPIO / SPI MISO | — | digital-input, digital-output, pwm |
| GPIO15 | GPIO / SPI CS | — | digital-input, digital-output, pwm |
| GPIO22 | UART TX | — | digital-output |
| GPIO23 | UART RX | — | digital-input |

## Where to Buy

- [M5Stack Store](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stack-nanoh2-dev-kit-esp32-h2&ref=openhardware.directory&product=m5stack-nanoh2&source=md-export) — 6.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fm5stack-nanoh2-dev-kit-esp32-h2&ref=openhardware.directory&product=m5stack-nanoh2&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-h2_datasheet_en.pdf&ref=openhardware.directory&product=m5stack-nanoh2&source=md-export)

## Tags

`esp32-h2`, `matter`, `thread`, `zigbee`, `ble`, `m5stack`, `stamp-module`, `grove`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-nanoh2)

---

# Inovato Quadra

> $29 Allwinner H6 mini PC running Armbian with 2GB RAM, 16GB eMMC, HDMI 2.0, WiFi 4, USB 3.0, and a fanless aluminum enclosure — the most affordable ARM Linux computer with Armbian Platinum support.

## Quick Facts

- **Brand:** Inovato
- **Price:** ~$29
- **CPU:** ARM Cortex-A53 ×4 @ 1.7GHz
- **RAM:** 2GB
- **Flash:** 16GB eMMC
- **USB:** 1× USB 3.0 Type-A, 1× USB 2.0 Type-A
- **Power:** 5V/2A (included in box)
- **Dimensions:** 92 × 92 × 22mm

## Connectivity

WiFi 802.11 b/g/n (WiFi 4, 2.4GHz) | Ethernet Fast Ethernet (100 Mbps)

## Components

- **Allwinner-H6** (soc): Allwinner H6 quad-core ARM Cortex-A53 @ 1.7GHz with Mali-T720 GPU, USB 3.0, and HDMI 2.0 support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.allwinnertech.com%2Findex.php%3Fc%3Dproduct%26a%3Dindex%26id%3D68&ref=openhardware.directory&product=inovato-quadra&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| USB 3.0 | USB 3.0 Host | — | digital-input, digital-output |
| USB 2.0 | USB 2.0 Host | — | digital-input, digital-output |

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Finovato.com%2F&ref=openhardware.directory&product=inovato-quadra&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.armbian.com%2F&ref=openhardware.directory&product=inovato-quadra&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.allwinnertech.com%2Findex.php%3Fc%3Dproduct%26a%3Dindex%26id%3D68&ref=openhardware.directory&product=inovato-quadra&source=md-export)

## Tags

`allwinner`, `h6`, `linux`, `arm`, `sbc`, `armbian`, `budget`, `mini-pc`, `cortex-a53`

---
[View full device page](https://openhardware.directory/s/1370/inovato-quadra)

---

# PhytiumPi

> Chinese Linux SBC by Phytium Technology featuring the domestic E2000Q quad-core Cortex-A55 compatible processor, up to 8GB DDR4, 32GB eMMC, Gigabit Ethernet, USB 3.0, and 12V DC, running Armbian for embedded Linux development.

## Quick Facts

- **Brand:** Phytium
- **Board Type:** linux-sbc
- **Price:** ~$82
- **CPU:** phytium-e2000q
- **RAM:** 4GB/8GB DDR4
- **Flash:** 16GB/32GB eMMC
- **USB:** USB 3.0,USB 2.0,USB-C
- **Power:** 12V DC

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- armbian

## Where to Buy

- [Phytium](https://openhardware.directory/r?to=https%3A%2F%2Fwww.phytium.com.cn%2Fhomepage%2Fphytium_pie%2F&ref=openhardware.directory&product=phytiumpi&source=md-export) — $82.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.phytium.com.cn%2Fhomepage%2Fphytium_pie%2F&ref=openhardware.directory&product=phytiumpi&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/phytiumpi)

---

# BeagleBone AI-64

> Open-source SBC powered by the TI TDA4VM automotive AI SoC with 8 TOPS neural accelerator, 4GB LPDDR4, and Gigabit Ethernet, designed for robotics and edge AI development.

## Quick Facts

- **Brand:** BeagleBoard.org
- **Board Type:** linux-sbc
- **Price:** ~$185.63
- **CPU:** Dual Cortex-A72 @ 2GHz + Dual Cortex-R5F @ 1GHz (TI TDA4VM)
- **RAM:** 4GB LPDDR4
- **Flash:** microSD only
- **USB:** USB-C 3.0 + USB 2.0 Type-A
- **Power:** 5V

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- armbian

## Components

- **TDA4VM** (soc): TI TDA4VM automotive-grade SoC with dual Cortex-A72 @ 2GHz + dual Cortex-R5F @ 1GHz and 8 TOPS MMA neural accelerator. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Fproduct%2FTDA4VM&ref=openhardware.directory&product=beaglebone-ai64&source=md-export)

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Ftexas-instruments%2FBEAGL-BONE-AI-64%2F21283880&ref=openhardware.directory&product=beaglebone-ai64&source=md-export) — $185.63

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.beagleboard.org%2Fboards%2Fbeaglebone-ai-64&ref=openhardware.directory&product=beaglebone-ai64&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fbeaglebone-ai64%2F&ref=openhardware.directory&product=beaglebone-ai64&source=md-export)

## Tags

`ai`, `robotics`, `edge-ai`, `beaglebone`, `arm`, `ti`, `automotive`, `npu`

---
[View full device page](https://openhardware.directory/s/1370/beaglebone-ai64)

---

# TI SK-AM69

> Texas Instruments SK-AM69 Starter Kit — octa-core Cortex-A72 evaluation board with 32GB LPDDR4 and 64 TOPS AI accelerator for high-performance edge AI and autonomous systems.

## Quick Facts

- **Brand:** Texas Instruments
- **Board Type:** linux-sbc
- **Price:** ~$299
- **CPU:** ti-am69
- **RAM:** 32GB LPDDR4
- **Flash:** eMMC
- **USB:** USB-C, USB 3.0
- **Power:** 12V DC

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [TI Store](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Ftool%2FSK-AM69&ref=openhardware.directory&product=ti-sk-am69&source=md-export) — $299.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Ftool%2FSK-AM69&ref=openhardware.directory&product=ti-sk-am69&source=md-export)

## Tags

`linux-sbc`, `armbian`, `cortex-a72`, `industrial`, `texas-instruments`, `developer-kit`, `edge-ai`, `autonomous`

---
[View full device page](https://openhardware.directory/s/1370/ti-sk-am69)

---

# BIGTREETECH CB1 V2.2

> Compact Linux compute module by BIGTREETECH, powered by the Allwinner H616 SoC with 1GB DDR3, 100M WiFi + 100M Ethernet, and microSD — designed as a drop-in Raspberry Pi CM4 replacement for 3D printer boards running Klipper.

## Quick Facts

- **Brand:** BIGTREETECH
- **Board Type:** linux-sbc
- **Price:** ~$25
- **CPU:** Quad-core Cortex-A53 @ 1.5GHz (Allwinner H616)
- **RAM:** 1GB DDR3
- **Flash:** microSD only
- **USB:** USB 2.0 (via carrier board)
- **Power:** 5V via carrier board
- **Dimensions:** 55mm x 40mm

## Connectivity

WiFi 802.11n (WiFi 4) 100Mbps | Ethernet 100Mbps (via carrier board)

## Compatible Firmware

- armbian

## Components

- **Allwinner-H616** (soc): Allwinner H616 quad-core Cortex-A53 @ 1.5GHz SoC with Mali-G31 GPU and 4K H.265 decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Flinux-sunxi.org%2FH616&ref=openhardware.directory&product=bigtreetech-cb1&source=md-export)

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [BIQU Equipment (Official)](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fcollections%2Fcb1-family&ref=openhardware.directory&product=bigtreetech-cb1&source=md-export) — ~$25.00
- [KB-3D](https://openhardware.directory/r?to=https%3A%2F%2Fkb-3d.com%2Fstore%2Fcontrollers-displays-drivers%2F1099-bigtreetech-cb1-compute-module-v22-1gb-1710077134247.html&ref=openhardware.directory&product=bigtreetech-cb1&source=md-export) — $22.39
- [3D Lab Tech](https://openhardware.directory/r?to=https%3A%2F%2Fwww.3dlabtech.ca%2Fproduct%2Fbigtreetech-cb1%2F&ref=openhardware.directory&product=bigtreetech-cb1&source=md-export) — CAD $29.95
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FBIGTREETECH-Ethernet-Compatible-Raspberry-Motherboard%2Fdp%2FB0BLN7TYH6&ref=openhardware.directory&product=bigtreetech-cb1&source=md-export) — ~$28.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fcollections%2Fcb1-family&ref=openhardware.directory&product=bigtreetech-cb1&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fbigtreetech-cb1%2F&ref=openhardware.directory&product=bigtreetech-cb1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FCB1&ref=openhardware.directory&product=bigtreetech-cb1&source=md-export)

## Tags

`3d-printing`, `klipper`, `compute-module`, `allwinner`, `wifi`, `rpi-cm4-compatible`

---
[View full device page](https://openhardware.directory/s/1370/bigtreetech-cb1)

---

# Clearfog PRO

> Industrial-grade network computing SBC by SolidRun, powered by the Marvell Armada 388 SoC, 1GB DDR3, 4GB eMMC, dual Gigabit Ethernet + SFP, mPCIe, SATA, and 12V DC power for router and NAS applications.

## Quick Facts

- **Brand:** SolidRun
- **Board Type:** linux-sbc
- **Price:** ~$169
- **CPU:** Dual-core Cortex-A9 @ 1.6GHz (Marvell Armada 388)
- **RAM:** 1GB DDR3
- **Flash:** 4GB eMMC
- **USB:** USB 3.0 + USB 2.0
- **Power:** 12V DC

## Connectivity

Ethernet Dual Gigabit + SFP

## Compatible Firmware

- armbian

## Components

- **Marvell-Armada-388** (soc): Marvell Armada 388 (88F6828) dual-core Cortex-A9 @ 1.6GHz SoC with hardware crypto engine, optimized for networking and NAS. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.marvell.com%2Fproducts%2Finfrastructure-processors%2Fnetworking-and-gateway%2Farmada-38x.html&ref=openhardware.directory&product=clearfog-pro&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fsolidrun.com%2Fproduct%2Fclearfog-pro%2F&ref=openhardware.directory&product=clearfog-pro&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fclearfog%2F&ref=openhardware.directory&product=clearfog-pro&source=md-export)

## Tags

`router`, `nas`, `networking`, `sfp`, `marvell`, `armada`, `vpn`, `sata`

---
[View full device page](https://openhardware.directory/s/1370/clearfog-pro)

---

# JetHub D1 / D1+

> DIN-rail mountable Linux IoT hub by JetHome, powered by the Amlogic S905W2 SoC with up to 4GB DDR4, 16GB eMMC, WiFi 5, Bluetooth 5.0, Gigabit Ethernet, and 12V DC — designed for home automation and industrial IoT.

## Quick Facts

- **Brand:** JetHome
- **Board Type:** linux-sbc
- **Price:** ~$95
- **CPU:** Quad-core Cortex-A35 @ 2GHz (Amlogic S905W2)
- **RAM:** 2GB or 4GB DDR4
- **Flash:** 16GB eMMC
- **USB:** USB 2.0 + USB-C
- **Power:** 12V DC

## Connectivity

WiFi 802.11ac (WiFi 5) | Bluetooth BLE 5.0 | Ethernet Gigabit

## Compatible Firmware

- armbian

## Components

- **Amlogic-S905W2** (soc): Amlogic S905W2 quad-core Cortex-A35 @ 2GHz SoC with Mali-G31 GPU and neural network engine for media and IoT applications. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amlogic.com%2F%23Products%2F393%2Findex.html&ref=openhardware.directory&product=jethub-d1&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2F1005010431713721.html&ref=openhardware.directory&product=jethub-d1&source=md-export) — $95.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fjethome.ru%2Fjethub-d1%2F&ref=openhardware.directory&product=jethub-d1&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Fjethub-d1%2F&ref=openhardware.directory&product=jethub-d1&source=md-export)

## Tags

`home-automation`, `iot-gateway`, `din-rail`, `amlogic`, `wifi`, `embedded-linux`, `industrial`

---
[View full device page](https://openhardware.directory/s/1370/jethub-d1)

---

# Heltec HT1303

> A mini-PCIe LoRaWAN concentrator module based on Semtech SX1303 + SX1250, enabling easy integration of LPWAN gateway capabilities into routers, Raspberry Pi, or other platforms with standard mini-PCIe slots.

## Quick Facts

- **Brand:** Heltec
- **Board Type:** LoRa Concentrator Module
- **Price:** ~$49
- **CPU:** SX1303,SX1250
- **RAM:** N/A (host-dependent)
- **Flash:** N/A (host-dependent)
- **Power:** 3.3V via mini-PCIe slot
- **Dimensions:** 51 × 30 × 10.5 mm

## Components


## Protocols

- **undefined**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht1303%2F&ref=openhardware.directory&product=heltec-ht1303&source=md-export)
- [manufacturer](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org&ref=openhardware.directory&product=heltec-ht1303&source=md-export)

## Tags

`lorawan`, `gateway`, `concentrator`, `mini-pcie`, `sx1303`, `sx1250`, `lpwan`

---
[View full device page](https://openhardware.directory/s/1370/heltec-ht1303)

---

# BeagleV-Fire

> RISC-V + FPGA single board computer powered by Microchip PolarFire MPFS025T with 4x RV64GC U54 cores at 667MHz, 23K FPGA logic elements, 2GB LPDDR4, 16GB eMMC, Gigabit Ethernet, M.2 E-Key, and BeagleBone cape headers.

## Quick Facts

- **Brand:** BeagleBoard
- **Board Type:** Single Board Computer
- **Price:** ~$149
- **CPU:** Microchip PolarFire MPFS025T (4x RV64GC U54,1x RV64IMAC E51 @ 667 MHz)
- **RAM:** 2GB LPDDR4
- **Flash:** 16GB eMMC,128Mbit SPI flash,128KB eNVM
- **GPIO:** 2x 46-pin BeagleBone cape headers with ADC pins
- **USB:** USB Type-C (High-Speed 480Mbps, dual-role)
- **Power:** USB-C 5V or screw terminal 5V

## Connectivity

Ethernet Gigabit Ethernet

## Compatible Firmware

- Ubuntu Linux
- Debian Linux

## Components

- **MPFS025T** (processor): Microchip PolarFire MPFS025T with 1x RV64IMAC E51 boot core + 4x RV64GC U54 application cores at 667MHz, plus 23K FPGA logic elements, 68 math blocks, and 4 SerDes lanes at 12.7Gbps — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.microchip.com%2Fen-us%2Fproducts%2Ffpgas-and-plds%2Fsystem-on-chip-fpgas%2Fpolarfire-soc-fpgas&ref=openhardware.directory&product=beaglev-fire&source=md-export)
- **16GB Kingston eMMC** (storage): 16GB Kingston eMMC for OS and application storage plus 128Mbit SPI flash for FPGA configuration — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.kingston.com%2Fen%2Fflash%2Femmc&ref=openhardware.directory&product=beaglev-fire&source=md-export)
- **2GB LPDDR4** (memory): 2GB LPDDR4 with 36-bit DDR4 memory controller featuring SECDED ECC for reliability — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.microchip.com%2Fen-us%2Fproducts%2Ffpgas-and-plds%2Fsystem-on-chip-fpgas%2Fpolarfire-soc-fpgas&ref=openhardware.directory&product=beaglev-fire&source=md-export)

## Protocols

- **USB 2.0 (High-Speed)**
- **PCIe Gen2 (2x)**
- **CSI (22-pin)**
- **SYZYGY**
- **UART**
- **I2C**
- **SPI**
- **CAN 2.0**
- **JTAG**
- **ADC**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Fbeagleboard-by-seeed-studio%2F102110898%2F21706497&ref=openhardware.directory&product=beaglev-fire&source=md-export) — $149.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FBeagleBoard-by-Seeed-Studio%2F102110898%3Fqs%3DHoCaDK9Nz5eU8X3%25252BpFx5gw%253D%253D&ref=openhardware.directory&product=beaglev-fire&source=md-export) — $149.00
- [Element14](https://openhardware.directory/r?to=https%3A%2F%2Freferral.element14.com%2FOrderCodeView%3Ffsku%3D4262565%26nsku%3D83AK1343&ref=openhardware.directory&product=beaglev-fire&source=md-export) — $149.00
- [Farnell UK](https://openhardware.directory/r?to=https%3A%2F%2Fuk.farnell.com%2Fbeagleboard%2F102110898%2Fbeaglev-fire%2Fdp%2F4262565&ref=openhardware.directory&product=beaglev-fire&source=md-export) — $149.00

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.beagleboard.org%2Fboards%2Fbeaglev-fire&ref=openhardware.directory&product=beaglev-fire&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fopenbeagle.org%2Fbeaglev%2Ffire&ref=openhardware.directory&product=beaglev-fire&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.beagleboard.org%2Flatest%2Fboards%2Fbeaglev%2Ffire%2F&ref=openhardware.directory&product=beaglev-fire&source=md-export)

## Tags

`beagleboard`, `risc-v`, `fpga`, `polarfire`, `single-board-computer`, `linux`, `open-hardware`, `pcie`, `syzygy`

---
[View full device page](https://openhardware.directory/s/1370/beaglev-fire)

---

# BIQU RGBDuino UNO V1.2

> Arduino UNO-compatible development board based on ATmega328P-AU at 16MHz/5V, featuring RGB LED indicators. Available in Geek Duck (V1.1) and Jenny (V1.2) variants for maker and education projects.

## Quick Facts

- **Brand:** BIQU
- **Board Type:** microcontroller
- **Price:** ~$7.3
- **CPU:** ATmega328P-AU
- **RAM:** 2KB
- **Flash:** 32KB
- **USB:** USB Type-B
- **Power:** 5V via USB Type-B or 7-12V via DC barrel jack

## Compatible Firmware

- Arduino

## Components

- **RGB LED** (led): Onboard RGB LED indicators for visual status feedback — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.microchip.com%2Fen-us%2Fproduct%2FATmega328P&ref=openhardware.directory&product=biqu-rgbduino-uno-v1-2&source=md-export)
- **16MHz Crystal** (oscillator): External 16MHz crystal providing accurate clock for the MCU — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.microchip.com%2Fen-us%2Fproduct%2FATmega328P&ref=openhardware.directory&product=biqu-rgbduino-uno-v1-2&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **PWM**

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Frgbduino-uno-v1-1-geek-duck-rgbduino-uno-v1-2-jenny-atmega328p-au-chip-16mhz-5v-development-board&ref=openhardware.directory&product=biqu-rgbduino-uno-v1-2&source=md-export) — $7.30

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Frgbduino-uno-v1-1-geek-duck-rgbduino-uno-v1-2-jenny-atmega328p-au-chip-16mhz-5v-development-board&ref=openhardware.directory&product=biqu-rgbduino-uno-v1-2&source=md-export)

## Tags

`arduino-compatible`, `atmega328p`, `rgb`, `development-board`, `5v`, `avr`, `biqu`, `open-source`, `education`

---
[View full device page](https://openhardware.directory/s/1370/biqu-rgbduino-uno-v1-2)

---

# CompuLab IOT-DIN-IMX8PLUS

> DIN-rail industrial IoT gateway with NXP i.MX8M Plus quad-core Cortex-A53 at 1.8GHz, up to 8GB RAM, dual LAN, CAN bus, RS485/RS232, optional LTE, stackable I/O modules (up to 12x serial, 32x DI/DO, ADC), and 15-year availability.

## Quick Facts

- **Brand:** CompuLab
- **Board Type:** industrial-controller
- **Price:** ~$309
- **CPU:** ARM Cortex-A53 4x1.8GHz, NXP i.MX8M Plus, 2 TOPS NPU
- **RAM:** 2GB/4GB/8GB LPDDR4
- **Flash:** 16GB/32GB/128GB eMMC
- **USB:** USB 3.0
- **Power:** 12-24V DC industrial

## Connectivity

WiFi 802.11ax (WiFi 6, optional) | Bluetooth Bluetooth 5.3 BLE (optional) | Ethernet 2x Gigabit

## Compatible Firmware

- arduino

## Components

- **i.MX8M-Plus** (mcu): NXP i.MX8M Plus quad-core ARM Cortex-A53 at 1.8GHz with 2 TOPS NPU for edge AI inference. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FIMX8MPLUSCEC.pdf&ref=openhardware.directory&product=compulab-iot-din-imx8plus&source=md-export)

## Protocols

- **RS485**: notes=Built-in + expandable up to 12x
- **RS232**: notes=Built-in + expandable
- **CAN**: notes=CAN bus interface
- **Modbus TCP**: notes=Via Ethernet
- **Modbus RTU**: notes=Via RS485

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| DI1 | Digital Input | — | digital-input |
| DI2 | Digital Input | — | digital-input |
| DO1 | Digital Output | — | digital-output |
| DO2 | Digital Output | — | digital-output |

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [CompuLab Shop (WiFi+LTE)](https://openhardware.directory/r?to=https%3A%2F%2Fshop.compulab.com%2Fproduct%2Fiot-din-imx8plus-4gb-ram-32gb-emmc-wifi-lte%2F&ref=openhardware.directory&product=compulab-iot-din-imx8plus&source=md-export) — $378.00
- [CompuLab Shop (LTE)](https://openhardware.directory/r?to=https%3A%2F%2Fshop.compulab.com%2Fproduct%2Fiot-din-imx8plus-4gb-ram-32gb-emmc-lte%2F&ref=openhardware.directory&product=compulab-iot-din-imx8plus&source=md-export) — $352.00
- [CompuLab Shop (base)](https://openhardware.directory/r?to=https%3A%2F%2Fshop.compulab.com%2Fproduct%2Fiot-din-imx8plus-2gb-ram-16gb-emmc-lte%2F&ref=openhardware.directory&product=compulab-iot-din-imx8plus&source=md-export) — $309.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.compulab.com%2Fproducts%2Fiot-gateways%2Fiot-din-imx8plus-industrial-iot-gateway%2F&ref=openhardware.directory&product=compulab-iot-din-imx8plus&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.compulab.com%2Fwp-content%2Fuploads%2F2024%2F05%2Fiot-din-imx8plus_user-manual_2024-05-05.pdf&ref=openhardware.directory&product=compulab-iot-din-imx8plus&source=md-export)

## Tags

`compulab`, `din-rail`, `iot-gateway`, `imx8m-plus`, `industrial`, `can-bus`, `rs485`, `modbus`, `lte`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/compulab-iot-din-imx8plus)

---

# DFRobot FireBeetle 328P BLE 4.1

> Low-power Arduino-compatible board with ATmega328P and Dialog BLE 4.1 chip, featuring 14 digital I/O, 6 analog inputs, wireless OTA programming, 25uA deep sleep, onboard LiPo charging, and dual interrupt wakeup in a compact 58x29mm form factor.

## Quick Facts

- **Brand:** DFRobot
- **Board Type:** dev-board
- **Price:** ~$18.9
- **CPU:** AVR 8-bit single-core @ 8MHz
- **RAM:** 2KB SRAM
- **Flash:** 32KB
- **USB:** Micro-USB
- **Power:** 5V via Micro-USB or 3.7V LiPo battery
- **Dimensions:** 58 x 29mm

## Connectivity

Bluetooth BLE 4.1

## Components

- **ATmega328P** (mcu): Atmel ATmega328P 8-bit AVR microcontroller running at 8MHz with 32KB flash, 2KB SRAM, 1KB EEPROM, Arduino Pro/Pro Mini compatible. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf&ref=openhardware.directory&product=dfrobot-firebeetle-328p-ble&source=md-export)
- **Dialog BLE 4.1** (mcu): Dialog Semiconductor BLE 4.1 chip supporting central and peripheral modes, up to 4-device cascade, P2P wireless programming, and 4 KB/s throughput. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FFireBeetle_Board-328P_with_BLE4.1_SKU__DFR0492&ref=openhardware.directory&product=dfrobot-firebeetle-328p-ble&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX | — | digital-input, digital-output |
| D1 | UART TX | — | digital-input, digital-output |
| D2 | INT0 (wakeup) | — | digital-input, digital-output, pwm |
| D3 | INT1 (wakeup) | — | digital-input, digital-output, pwm |
| D4 | Digital I/O | — | digital-input, digital-output |
| D5 | Digital I/O | — | digital-input, digital-output, pwm |
| D6 | Digital I/O | — | digital-input, digital-output, pwm |
| D7 | Digital I/O | — | digital-input, digital-output |
| D8 | Digital I/O | — | digital-input, digital-output |
| D9 | Digital I/O | — | digital-input, digital-output, pwm |
| D10 | SPI SS | — | digital-input, digital-output, pwm |
| D11 | SPI MOSI | — | digital-input, digital-output |
| D12 | SPI MISO | — | digital-input, digital-output |
| D13 | SPI SCK / LED | — | digital-input, digital-output |
| A0 | Analog In | — | digital-input, digital-output, adc |
| A1 | Analog In | — | digital-input, digital-output, adc |
| A2 | Analog In | — | digital-input, digital-output, adc |
| A3 | Analog In | — | digital-input, digital-output, adc |
| A4 | I2C SDA | — | digital-input, digital-output, adc |
| A5 | I2C SCL | — | digital-input, digital-output, adc |

## Where to Buy

- [DFRobot](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1646.html&ref=openhardware.directory&product=dfrobot-firebeetle-328p-ble&source=md-export) — $18.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.dfrobot.com%2Fproduct-1646.html&ref=openhardware.directory&product=dfrobot-firebeetle-328p-ble&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.dfrobot.com%2FFireBeetle_Board-328P_with_BLE4.1_SKU__DFR0492&ref=openhardware.directory&product=dfrobot-firebeetle-328p-ble&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/dfrobot-firebeetle-328p-ble)

---

# NanoPi K2

> FriendlyElec NanoPi K2 — Amlogic S905 SBC with 2GB DDR3, WiFi 802.11n, Bluetooth 4.0, 4× USB 2.0, Gigabit Ethernet, and HDMI for media and IoT Linux projects.

## Quick Facts

- **Brand:** FriendlyElec
- **Price:** ~$39.99
- **CPU:** Amlogic S905 (Cortex-A53×4 @ 1.5GHz)
- **RAM:** 2GB DDR3
- **Flash:** 8GB eMMC
- **USB:** USB 2.0×4, USB-C
- **Power:** 12V DC barrel jack

## Connectivity

WiFi 802.11b/g/n | Bluetooth 4.0 | Ethernet Gigabit Ethernet

## Components

- **Amlogic S905** (soc): Amlogic S905 quad-core Cortex-A53 SoC with Mali-450 GPU, one of the first popular 64-bit ARM media processors. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdn.odroid.com%2FS905%2FDataSheet%2FS905_Public_Datasheet_V1.1.4.pdf&ref=openhardware.directory&product=friendlyelec-nanopi-k2&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D188&ref=openhardware.directory&product=friendlyelec-nanopi-k2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_K2&ref=openhardware.directory&product=friendlyelec-nanopi-k2&source=md-export)

## Tags

`sbc`, `amlogic`, `s905`, `friendlyelec`, `nanopi`, `wifi`, `bluetooth`, `media`, `linux-sbc`

---
[View full device page](https://openhardware.directory/s/1370/friendlyelec-nanopi-k2)

---

# DC Boarduino

> The DC Boarduino is a slim, breadboard-friendly Arduino-compatible development board based on the ATmega328 at 16MHz, with a 2.1mm DC barrel jack for 7–17V input, USB-TTL serial header, ICSP programming port, and a form factor optimized for direct breadboard insertion.

## Quick Facts

- **Brand:** Adafruit
- **Board Type:** dev-board
- **Price:** ~$17.5
- **CPU:** ATmega328P @ 16MHz
- **RAM:** 2 KB SRAM
- **Flash:** 32 KB
- **Power:** 7–17V DC via 2.1mm barrel jack
- **Dimensions:** 76mm × 20.3mm × 1.65mm

## Compatible Firmware

- arduino

## Components

- **ATmega328P** (mcu): Microchip ATmega328P 8-bit AVR RISC at 16MHz, 32KB flash, 2KB SRAM, 1KB EEPROM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf&ref=openhardware.directory&product=dc-boarduino&source=md-export)

## Protocols

- **I2C**: SDA=A4, SCL=A5
- **SPI**: MOSI=D11, MISO=D12, SCK=D13, SS=D10
- **UART**: TX=D1, RX=D0
- **PWM**
- **ADC**
- **JTAG**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | D0 | — | GPIO, UART RX |
| D1 | D1 | — | GPIO, UART TX |
| D2 | D2 | — | GPIO, INT0 |
| D3 | D3 | — | GPIO, PWM, INT1 |
| D4 | D4 | — | GPIO |
| D5 | D5 | — | GPIO, PWM |
| D6 | D6 | — | GPIO, PWM |
| D7 | D7 | — | GPIO |
| D8 | D8 | — | GPIO |
| D9 | D9 | — | GPIO, PWM |
| D10 | D10 | — | GPIO, PWM, SPI SS |
| D11 | D11 | — | GPIO, PWM, SPI MOSI |
| D12 | D12 | — | GPIO, SPI MISO |
| D13 | D13 | — | GPIO, SPI CLK, LED |
| A0 | A0 | — | GPIO, ADC |
| A1 | A1 | — | GPIO, ADC |
| A2 | A2 | — | GPIO, ADC |
| A3 | A3 | — | GPIO, ADC |
| A4 | A4 | — | GPIO, ADC, I2C SDA |
| A5 | A5 | — | GPIO, ADC, I2C SCL |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F72&ref=openhardware.directory&product=dc-boarduino&source=md-export) — $17.50

## Available Software


## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F72&ref=openhardware.directory&product=dc-boarduino&source=md-export)
- [docs](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fboarduino-kits&ref=openhardware.directory&product=dc-boarduino&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit&ref=openhardware.directory&product=dc-boarduino&source=md-export)

## Tags

`boarduino`, `arduino-compatible`, `atmega328`, `breadboard`, `avr`, `diy-kit`, `ftdi`, `adafruit`

---
[View full device page](https://openhardware.directory/s/1370/dc-boarduino)

---

# Heltec CubeCell AM02 Module Plus

> Ultra-compact LoRa/LoRaWAN module based on the ASR6502 SoC (ARM Cortex-M0+ @ 48MHz + SX1262), designed for SMT integration into custom IoT sensor nodes with 3.5uA deep sleep current.

## Quick Facts

- **Brand:** Heltec Automation
- **Board Type:** module
- **Price:** ~$11.9
- **CPU:** ARM Cortex-M0,single-core @ 48MHz
- **RAM:** 16KB SRAM
- **Flash:** 128KB
- **GPIO:** 16 pins
- **USB:** none (module)
- **Power:** 1.8V-3.6V via VDD pin
- **Dimensions:** 20.4 × 20.4 × 3mm

## Components

- **ASR6502** (mcu): Integrated SoC combining a PSoC 4000 series ARM Cortex-M0+ MCU at 48MHz with 128KB flash and 16KB SRAM, plus a Semtech SX1262 LoRa transceiver. Features 8-channel DMA, 12-bit ADC, and 3.5uA deep sleep. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AM02_Module%2FAM02.pdf&ref=openhardware.directory&product=heltec-cubecell-am02-module-plus&source=md-export)
- **SX1262** (radio): Semtech SX1262 long-range, low-power sub-GHz RF transceiver supporting LoRa and FSK modulation from 150MHz to 960MHz. Maximum TX power +22dBm with -148dBm sensitivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F6%2Fb%2F5%2F1%2F4%2FSX1262_datasheet.pdf&ref=openhardware.directory&product=heltec-cubecell-am02-module-plus&source=md-export)

## Protocols

- **UART** (UART1): TX=GPIO18, RX=GPIO17
- **UART** (UART2): TX=GPIO30, RX=GPIO29
- **SPI** (SPI1): MOSI=GPIO9, MISO=GPIO8, CLK=GPIO23, NSS=any GPIO
- **I2C** (I2C0): SCL=GPIO39, SDA=GPIO40
- **I2C** (I2C1): SCL=GPIO36, SDA=GPIO37
- **SWD**: SWCLK=GPIO20, SWD=GPIO19
- **PWM**: PWM1=GPIO23, PWM2=GPIO23

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | ADC2 — Analog Input | — | adc, digital-input, digital-output |
| GPIO2 | ADC3 — Analog Input | — | adc, digital-input, digital-output |
| GPIO3 | ADC1 — Analog Input | — | adc, digital-input, digital-output |
| GPIO4 | General Purpose I/O | — | digital-input, digital-output |
| GPIO5 | General Purpose I/O | — | digital-input, digital-output |
| GPIO6 | General Purpose I/O | — | digital-input, digital-output |
| GPIO7 | General Purpose I/O | — | digital-input, digital-output |
| GPIO8 | SPI1 MISO / SCL1 | — | digital-input, digital-output |
| GPIO9 | SPI1 MOSI / SDA1 | — | digital-input, digital-output |
| GPIO10 | General Purpose I/O | — | digital-input, digital-output |
| GPIO11 | General Purpose I/O | — | digital-input, digital-output |
| GPIO12 | General Purpose I/O | — | digital-input, digital-output |
| GPIO13 | General Purpose I/O | — | digital-input, digital-output |
| GPIO14 | General Purpose I/O | — | digital-input, digital-output |
| GPIO15 | SWD Debug | — | digital-input, digital-output |
| GPIO16 | SWCLK Debug | — | digital-input, digital-output |

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhtcc-am02%2F&ref=openhardware.directory&product=heltec-cubecell-am02-module-plus&source=md-export) — 11.90
- [Eckstein Shop](https://openhardware.directory/r?to=https%3A%2F%2Feckstein-shop.de%2FHeltec-CubeCell-AM02-Module-Plus-EN&ref=openhardware.directory&product=heltec-cubecell-am02-module-plus&source=md-export) — 12.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhtcc-am02%2F&ref=openhardware.directory&product=heltec-cubecell-am02-module-plus&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FCubeCell-Arduino&ref=openhardware.directory&product=heltec-cubecell-am02-module-plus&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fcubecell-series%2Fhtcc_am02%2F&ref=openhardware.directory&product=heltec-cubecell-am02-module-plus&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AM02_Module%2FAM02.pdf&ref=openhardware.directory&product=heltec-cubecell-am02-module-plus&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AM02_Module%2Fsch_pcb_package.zip&ref=openhardware.directory&product=heltec-cubecell-am02-module-plus&source=md-export)

## Tags

`lora`, `lorawan`, `iot`, `module`, `low-power`, `cubecell`, `asr6502`, `sx1262`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/heltec-cubecell-am02-module-plus)

---

# Heltec CubeCell AB01 Dev-Board (V2)

> Ultra-low power LoRa/LoRaWAN development board based on the ASR6502 SiP (ARM Cortex-M0+ @ 48MHz + SX1262), with USB-C, solar panel support, and 3.5uA deep sleep current. Ideal for remote environmental sensing and battery-powered IoT nodes.

## Quick Facts

- **Brand:** Heltec
- **Board Type:** dev-board
- **Price:** ~$13.9
- **CPU:** ARM Cortex-M0,single-core @ 48MHz
- **RAM:** 16KB SRAM
- **Flash:** 128KB
- **USB:** USB-C (via CP2102 serial bridge)
- **Power:** 5V via USB-C,3.7V LiPo,5.5-7V Solar
- **Dimensions:** 40.64 × 22.86 × 7.6mm

## Components

- **ASR6502** (mcu): ASR Micro ASR6502 System-in-Package integrating a 48MHz ARM Cortex-M0+ MCU with Semtech SX1262 LoRa transceiver, 128KB flash, and 16KB SRAM. Based on Cypress PSoC 4000 series. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.asrmicro.com%2Fen%2Fgoods%2Fproinfo%2F22.html&ref=openhardware.directory&product=heltec-cubecell-ab01-v2&source=md-export)
- **SX1262** (radio): Semtech SX1262 long-range, low-power sub-GHz RF transceiver supporting LoRa and (G)FSK modulation across 150-960MHz. Delivers +22dBm TX power with -138dBm sensitivity at SF12/125kHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F6%2Fb%2F5%2F1%2F4%2FSX1262_datasheet.pdf&ref=openhardware.directory&product=heltec-cubecell-ab01-v2&source=md-export)
- **CP2102** (usb-serial): Silicon Labs CP2102 USB 2.0 full-speed to UART bridge, providing serial programming and debug access via USB-C connector. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=heltec-cubecell-ab01-v2&source=md-export)
- **SK6812** (led-driver): SK6812 individually addressable RGB LED with integrated control circuit for programmable status indication. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F2757%2Fp2757_SK6812RGBW_REV01.pdf&ref=openhardware.directory&product=heltec-cubecell-ab01-v2&source=md-export)

## Protocols

- **I2C**: SDA=GPIO4, SCL=GPIO5
- **SPI**: MOSI=SPI_MOSI, MISO=SPI_MISO, SCK=SPI_SCK
- **UART**: TX=UART_TX, RX=UART_RX
- **SWD**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | Digital I/O | — | digital-input, digital-output |
| GPIO1 | Digital I/O / ADC | — | digital-input, digital-output, adc |
| GPIO2 | Digital I/O / ADC | — | digital-input, digital-output, adc |
| GPIO3 | Digital I/O / ADC | — | digital-input, digital-output, adc |
| GPIO4 | I2C SDA | — | digital-input, digital-output |
| GPIO5 | I2C SCL | — | digital-input, digital-output |
| GPIO6 | Digital I/O | — | digital-input, digital-output |
| GPIO7 | ADC_CTRL / Digital I/O | — | digital-input, digital-output |
| Vext | External sensor power control (3.3V switchable) | — | digital-output |
| RST | Reset | — | digital-input |
| RX | UART RX | — | digital-input |
| TX | UART TX | — | digital-output |

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhtcc-ab01-v2%2F&ref=openhardware.directory&product=heltec-cubecell-ab01-v2&source=md-export) — 13.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhtcc-ab01-v2%2F&ref=openhardware.directory&product=heltec-cubecell-ab01-v2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FCubeCell-Arduino&ref=openhardware.directory&product=heltec-cubecell-ab01-v2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fcubecell-series%2Fhtcc_ab01%2F&ref=openhardware.directory&product=heltec-cubecell-ab01-v2&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB01_V2%2FHTCC-AB01_V2%28Rev1.1%29.pdf&ref=openhardware.directory&product=heltec-cubecell-ab01-v2&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB01_V2%2FHTCC-AB01_V2_Schematic_Diagram.pdf&ref=openhardware.directory&product=heltec-cubecell-ab01-v2&source=md-export)

## Tags

`lorawan`, `lora`, `iot`, `low-power`, `solar`, `cubecell`, `asr6502`, `sx1262`, `heltec`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/heltec-cubecell-ab01-v2)

---

# CUBEEK CubeSat Educational Kit

> Open-source 1U CubeSat educational kit powered by Arduino Pro Mini with LoRa communication, multi-sensor payload (IMU, barometer, GPS, temperature), solar-powered EPS, and ground station dashboard for learning satellite engineering.

## Quick Facts

- **Brand:** Orion Space
- **Board Type:** cubesat-kit
- **Price:** ~$220
- **CPU:** ATmega328P @ 16MHz
- **RAM:** 2KB SRAM
- **Flash:** 32KB
- **USB:** Micro-USB (FT232R)
- **Power:** 5V via Micro-USB / 3.7V Li-ion (solar charging)
- **Dimensions:** 100 x 100 x 100 mm (1U CubeSat)

## Connectivity

WiFi false | Bluetooth false | Zigbee false | Ethernet false

## Compatible Firmware

- arduino

## Components

- **ATmega328P** (mcu): On-Board Computer (OBC) based on the Arduino Pro Mini with ATmega328P running at 16MHz, with built-in FT232R USB programmer and real-time clock. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FAtmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf&ref=openhardware.directory&product=cubeek-cubesat-educational-kit&source=md-export)
- **RA-02** (radio): Ai-Thinker RA-02 LoRa transceiver based on Semtech SX1278 operating at 433MHz for satellite-to-ground communication link. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.ai-thinker.com%2F_media%2Flora%2Fdocs%2Fra-02_v1.1_datasheet.pdf&ref=openhardware.directory&product=cubeek-cubesat-educational-kit&source=md-export)
- **RFM26W** (radio): HopeRF RFM26W ISM transceiver supporting CW, FSK, and GFSK modulation with external dipole antenna. Available in the CUBEEK-CW variant. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hoperf.com%2Fdata%2Fupload%2Fportal%2F20190307%2FRFM26W.pdf&ref=openhardware.directory&product=cubeek-cubesat-educational-kit&source=md-export)
- **MPU6050** (imu): InvenSense MPU-6050 6-axis inertial measurement unit combining a 3-axis accelerometer and 3-axis gyroscope for attitude determination. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finvensense.tdk.com%2Fwp-content%2Fuploads%2F2015%2F02%2FMPU-6000-Datasheet1.pdf&ref=openhardware.directory&product=cubeek-cubesat-educational-kit&source=md-export)
- **BMP085** (barometer): Bosch BMP085 digital barometric pressure sensor measuring 300-1100 hPa with temperature output for altitude estimation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FBMP085_DataSheet_Rev.1.0_01July2008.pdf&ref=openhardware.directory&product=cubeek-cubesat-educational-kit&source=md-export)
- **DS18B20** (temperature-sensor): Maxim/Dallas DS18B20 1-Wire digital temperature sensor measuring -55 to +125 degrees C with +/-0.5 degree accuracy for thermal monitoring. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.maximintegrated.com%2Fen%2Fds%2FDS18B20.pdf&ref=openhardware.directory&product=cubeek-cubesat-educational-kit&source=md-export)
- **TEMT6000** (light-sensor): Vishay TEMT6000 ambient light sensor with spectral response matching the human eye for illumination measurement. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.vishay.com%2Fdocs%2F81579%2Ftemt6000.pdf&ref=openhardware.directory&product=cubeek-cubesat-educational-kit&source=md-export)
- **NEO-6M** (gps): u-blox NEO-6M GPS receiver with 50-channel acquisition engine and -161 dBm tracking sensitivity for position and time data. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcontent.u-blox.com%2Fsites%2Fdefault%2Ffiles%2Fproducts%2Fdocuments%2FNEO-6_DataSheet_%28GPS.G6-HW-09005%29.pdf&ref=openhardware.directory&product=cubeek-cubesat-educational-kit&source=md-export)
- **INA219** (power-monitor): Texas Instruments INA219 bidirectional I2C current and power monitor for EPS housekeeping telemetry, measuring solar panel and battery performance. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fina219.pdf&ref=openhardware.directory&product=cubeek-cubesat-educational-kit&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **1-Wire**
- **ADC**
- **LoRa**

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No
- **License:** MIT

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Forionspace%2Fcubeek-cubesat-educational-kit%2F&ref=openhardware.directory&product=cubeek-cubesat-educational-kit&source=md-export) — $220.00

## Available Software

- [CUBEEK Dashboard](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Forionspacenepal%2Fcubeek-public%2Ftree%2Fmain%2FCUBEEK-Dashboard&ref=openhardware.directory&product=cubeek-cubesat-educational-kit&source=md-export)
- [Cubeek Flight Firmware](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Forionspacenepal%2Fcubeek-public&ref=openhardware.directory&product=cubeek-cubesat-educational-kit&source=md-export)
- [Ground Station Firmware](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Forionspacenepal%2Fcubeek-public&ref=openhardware.directory&product=cubeek-cubesat-educational-kit&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Forionspace%2Fcubeek-cubesat-educational-kit%2F&ref=openhardware.directory&product=cubeek-cubesat-educational-kit&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Forionspacenepal%2Fcubeek-public&ref=openhardware.directory&product=cubeek-cubesat-educational-kit&source=md-export)

## Tags

`cubesat`, `arduino`, `lora`, `satellite`, `education`, `stem`, `open-source`, `gps`, `imu`, `telemetry`, `ground-station`, `nepal`

---
[View full device page](https://openhardware.directory/s/1370/cubeek-cubesat-educational-kit)

---

# Sonoff ZBMini

> Zigbee 3.0 two-way smart switch in a tiny form factor that fits behind existing wall switches. Supports external switch input and works with Home Assistant, SmartThings, and other Zigbee hubs.

## Quick Facts

- **Brand:** Sonoff
- **Board Type:** smart-switch
- **Price:** ~$9.99
- **CPU:** EFR32MG21
- **RAM:** 96 KB
- **Flash:** 1024 KB
- **Power:** 100-240V AC

## Connectivity

Zigbee Zigbee 3.0

## Compatible Firmware

- zigbee2mqtt
- zha

## Components

- **EFR32MG21** (MCU): Silicon Labs EFR32MG21 Mighty Gecko — ARM Cortex-M33 MCU with integrated Zigbee 3.0, Thread, and Bluetooth 5.0 radio — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2Fefr32mg21-datasheet.pdf&ref=openhardware.directory&product=sonoff-zbmini&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fseeed-studio-sonoff-zbmini-zigbee3-0-two-way-smart-switch-smart-home-voice-control&ref=openhardware.directory&product=sonoff-zbmini&source=md-export) — $19.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fsonoff.tech%2Fproduct%2Fdiy-smart-switches%2Fzbmini%2F&ref=openhardware.directory&product=sonoff-zbmini&source=md-export)

## Tags

`zigbee`, `smart-switch`, `sonoff`, `home-automation`, `smart-home`, `behind-wall`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/sonoff-zbmini)

---

# Micro Journal Rev.3: Nadia

> A 48-key ortholinear mechanical keyboard designed as a distraction-free writing companion for phones and tablets, powered by RP2040 with QMK/Vial firmware and dual rotary encoders.

## Quick Facts

- **Brand:** un-kyu-lee
- **Board Type:** keyboard-pcb
- **Price:** ~$99
- **CPU:** RP2040
- **RAM:** 264KB
- **Flash:** 2MB
- **GPIO:** 18 pins
- **USB:** USB-C
- **Power:** 5V

## Compatible Firmware

- qmk
- vial

## Components

- **RP2040** (mcu): Raspberry Pi RP2040 dual-core ARM Cortex-M0+ microcontroller at 133MHz with 264KB SRAM and 8 PIO state machines — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=micro-journal-rev3-nadia&source=md-export)
- **EC11** (rotary-encoder): Alps Alpine EC11 incremental rotary encoder with push-button switch — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ftech.alpsalpine.com%2Fe%2Fproducts%2Fdetail%2FEC11E15244G1%2F&ref=openhardware.directory&product=micro-journal-rev3-nadia&source=md-export)
- **1N4148** (diode): High-speed switching diode for keyboard matrix anti-ghosting — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.vishay.com%2Fdocs%2F81857%2F1n4148.pdf&ref=openhardware.directory&product=micro-journal-rev3-nadia&source=md-export)

## Protocols

- **USB HID**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GP2 | Matrix Row 0 | — | — |
| GP3 | Matrix Row 1 | — | — |
| GP4 | Matrix Row 2 | — | — |
| GP5 | Matrix Row 3 | — | — |
| GP6 | Matrix Col 0 | — | — |
| GP7 | Matrix Col 1 | — | — |
| GP8 | Matrix Col 2 | — | — |
| GP9 | Matrix Col 3 | — | — |
| GP10 | Matrix Col 4 | — | — |
| GP11 | Matrix Col 5 | — | — |
| GP12 | Matrix Col 6 | — | — |
| GP13 | Matrix Col 7 | — | — |
| GP14 | Matrix Col 8 | — | — |
| GP15 | Matrix Col 9 | — | — |
| GP16 | Matrix Col 10 | — | — |
| GP17 | Matrix Col 11 | — | — |
| GP18 | Matrix Row 4 | — | — |
| GP19 | Encoder 1 Pin A | — | — |
| GP20 | Encoder 1 Pin B | — | — |
| GP21 | Encoder 2 Pin A | — | — |
| GP22 | Encoder 2 Pin B | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** Yes

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Funkyulee%2Fmicro-journal-rev3-nadia%2F&ref=openhardware.directory&product=micro-journal-rev3-nadia&source=md-export) — $99.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Funkyulee%2Fmicro-journal-rev3-nadia%2F&ref=openhardware.directory&product=micro-journal-rev3-nadia&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Funkyulee%2Fmicro-journal&ref=openhardware.directory&product=micro-journal-rev3-nadia&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=micro-journal-rev3-nadia&source=md-export)

## Tags

`mechanical-keyboard`, `distraction-free-writing`, `ortholinear`, `rp2040`, `qmk`, `vial`, `cherry-mx`, `usb-hid`, `writerdeck`, `raspberry-pi-pico`

---
[View full device page](https://openhardware.directory/s/1370/micro-journal-rev3-nadia)

---

# Waveshare RP2350-ETH-8DI-8RO

> Industrial DIN-rail RP2350B controller with 8-channel relay outputs (10A/250VAC), 8 optocoupler-isolated digital inputs, W5500 Ethernet (optional PoE), isolated RS485, RTC, microSD, and 7-36V wide-voltage power input in a robust ABS enclosure.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** industrial-controller
- **Price:** ~$41.99
- **CPU:** ARM Cortex-M33 / RISC-V Hazard3 dual-core @ 150MHz, FPU, DSP, TrustZone, 12 PIO state machines
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **USB:** USB-C (USB 1.1 host/device)
- **Power:** 7-36V DC (screw terminal) or 5V USB-C
- **Dimensions:** 175 × 90 × 40mm

## Connectivity

Ethernet 10/100 Mbps (W5500)

## Components

- **RP2350B** (mcu): Raspberry Pi RP2350B dual-core microcontroller with switchable ARM Cortex-M33 and Hazard3 RISC-V cores at 150MHz, 520KB SRAM, and 12 PIO state machines. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2350-eth-8di-8ro&source=md-export)
- **W5500** (ethernet-phy): WIZnet W5500 hardwired TCP/IP embedded Ethernet controller with SPI interface, 8 simultaneous sockets, and 10/100Mbps connectivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2Fcommon%2FW5500_datasheet_v1.0.2_1.pdf&ref=openhardware.directory&product=waveshare-rp2350-eth-8di-8ro&source=md-export)
- **PCF85063ATL** (rtc): NXP PCF85063A tiny RTC with I2C interface, alarm function, and CR1220 backup battery holder for accurate timekeeping during power loss. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FPCF85063A.pdf&ref=openhardware.directory&product=waveshare-rp2350-eth-8di-8ro&source=md-export)
- **WS2812B** (led-driver): WS2812 programmable RGB LED providing visual status indication for system state and diagnostics. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812.pdf&ref=openhardware.directory&product=waveshare-rp2350-eth-8di-8ro&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| DI1 | Digital Input 1 (optocoupler isolated, 5-36V) | — | digital-input |
| DI2 | Digital Input 2 (optocoupler isolated, 5-36V) | — | digital-input |
| DI3 | Digital Input 3 (optocoupler isolated, 5-36V) | — | digital-input |
| DI4 | Digital Input 4 (optocoupler isolated, 5-36V) | — | digital-input |
| DI5 | Digital Input 5 (optocoupler isolated, 5-36V) | — | digital-input |
| DI6 | Digital Input 6 (optocoupler isolated, 5-36V) | — | digital-input |
| DI7 | Digital Input 7 (optocoupler isolated, 5-36V) | — | digital-input |
| DI8 | Digital Input 8 (optocoupler isolated, 5-36V) | — | digital-input |
| RO1 | Relay Output 1 (10A/250VAC, 1NO+1NC) | — | digital-output |
| RO2 | Relay Output 2 (10A/250VAC, 1NO+1NC) | — | digital-output |
| RO3 | Relay Output 3 (10A/250VAC, 1NO+1NC) | — | digital-output |
| RO4 | Relay Output 4 (10A/250VAC, 1NO+1NC) | — | digital-output |
| RO5 | Relay Output 5 (10A/250VAC, 1NO+1NC) | — | digital-output |
| RO6 | Relay Output 6 (10A/250VAC, 1NO+1NC) | — | digital-output |
| RO7 | Relay Output 7 (10A/250VAC, 1NO+1NC) | — | digital-output |
| RO8 | Relay Output 8 (10A/250VAC, 1NO+1NC) | — | digital-output |

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2350-eth-8di-8ro.htm&ref=openhardware.directory&product=waveshare-rp2350-eth-8di-8ro&source=md-export) — 41.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2350-eth-8di-8ro.htm&ref=openhardware.directory&product=waveshare-rp2350-eth-8di-8ro&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRP2350-ETH-8DI-8RO&ref=openhardware.directory&product=waveshare-rp2350-eth-8di-8ro&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2350-eth-8di-8ro&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-rp2350-eth-8di-8ro)

---

# FriendlyElec NanoPi R76S

> Ultra-compact 58×58mm dual 2.5GbE router board with RK3576 octa-core, up to 4GB LPDDR4X, 32GB eMMC, and USB-C 5V power — a high-throughput mini network appliance for home lab and edge networking.

## Quick Facts

- **Brand:** FriendlyElec
- **Price:** ~$55
- **CPU:** ARM Cortex-A72 ×4 @ 2.2GHz + Cortex-A53 ×4 @ 1.8GHz
- **RAM:** 2GB / 4GB LPDDR4X
- **Flash:** 32GB eMMC
- **USB:** 1× USB 3.2 Gen1 Type-A
- **Power:** USB-C 5V
- **Dimensions:** 58 × 58 × 1.6mm

## Connectivity

Ethernet 2× 2.5 Gbps (PCIe)

## Components

- **RK3576** (soc): Rockchip RK3576: 4× Cortex-A72 @ 2.2GHz + 4× Cortex-A53 @ 1.8GHz, Mali-G52 MC3 GPU, 6 TOPS NPU. 8K@30fps H.265/VP9 decode, 4K@60fps H.264 encode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2024%2F0322%2F1299.html&ref=openhardware.directory&product=friendlyelec-nanopi-r76s&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| FPC Pin 1 | UART_TX | — | digital-output, uart |
| FPC Pin 2 | UART_RX | — | digital-input, uart |
| FPC Pin 3 | I2C_SDA | — | digital-input, digital-output, i2c |
| FPC Pin 4 | I2C_SCL | — | digital-input, digital-output, i2c |
| FPC Pin 5 | GPIO | — | digital-input, digital-output |
| FPC Pin 6 | GPIO | — | digital-input, digital-output |
| FPC Pin 7 | GPIO | — | digital-input, digital-output |
| FPC Pin 8 | GPIO | — | digital-input, digital-output |

## Where to Buy

- [FriendlyElec](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2FNanoPi-R76S-p-1749.html&ref=openhardware.directory&product=friendlyelec-nanopi-r76s&source=md-export) — 55.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2FNanoPi-R76S-p-1749.html&ref=openhardware.directory&product=friendlyelec-nanopi-r76s&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_R76S&ref=openhardware.directory&product=friendlyelec-nanopi-r76s&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2024%2F0322%2F1299.html&ref=openhardware.directory&product=friendlyelec-nanopi-r76s&source=md-export)

## Tags

`rk3576`, `linux`, `arm`, `sbc`, `router`, `openwrt`, `2.5gbe`, `friendlyelec`, `rockchip`, `network`

---
[View full device page](https://openhardware.directory/s/1370/friendlyelec-nanopi-r76s)

---

# Mekotronics R58-4X4

> RK3588 Arm PC with 4×HDMI inputs (4K@60Hz each), 1×HDMI 2.1 output (8K@60Hz), WiFi 6, GbE, M.2 NVMe, 4G LTE support, and up to 16GB RAM — a dedicated multi-source HDMI capture and digital signage computer.

## Quick Facts

- **Brand:** Mekotronics
- **Price:** ~$189
- **CPU:** ARM Cortex-A76 ×4 @ 2.4GHz + Cortex-A55 ×4 @ 1.8GHz
- **RAM:** 4GB / 8GB / 16GB LPDDR4X
- **Flash:** 32GB / 64GB / 128GB eMMC 5.1 + M.2 NVMe (PCIe)
- **USB:** 2× USB 3.0, 2× USB 2.0, 1× USB Type-C
- **Power:** 12V DC (aluminum enclosure)

## Connectivity

WiFi 802.11 a/b/g/n/ac/ax (WiFi 6) | Ethernet Gigabit Ethernet

## Components

- **RK3588** (soc): Rockchip RK3588: 4× Cortex-A76 @ 2.4GHz + 4× Cortex-A55 @ 1.8GHz, Mali-G610 MP4 GPU, 6 TOPS NPU, 8K H.265/VP9 decode @ 60fps, 8K HDMI 2.1 output. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=mekotronics-r58-4x4&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| USB 3.0 x2 | USB 3.0 Host | — | digital-input, digital-output |
| USB 2.0 x2 | USB 2.0 Host | — | digital-input, digital-output |
| HDMI IN x4 | 4× HDMI Input (4K@60Hz) | — | digital-input |
| HDMI OUT | HDMI 2.1 Output (8K@60Hz) | — | digital-output |

## Where to Buy

- [Mekotronics](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mekotronics.com%2F&ref=openhardware.directory&product=mekotronics-r58-4x4&source=md-export) — 189.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mekotronics.com%2F&ref=openhardware.directory&product=mekotronics-r58-4x4&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=mekotronics-r58-4x4&source=md-export)

## Tags

`rk3588`, `linux`, `arm`, `hdmi-input`, `digital-signage`, `mekotronics`, `video-capture`, `rockchip`, `embedded-pc`

---
[View full device page](https://openhardware.directory/s/1370/mekotronics-r58-4x4)

---

# ODROID M1

> The ODROID M1 is a maker-focused single-board computer from Hardkernel powered by the Rockchip RK3568 quad-core SoC with up to 8GB LPDDR4 RAM and M.2 NVMe support. It combines industrial-grade features with broad Armbian Linux support.

## Quick Facts

- **Brand:** Hardkernel
- **Price:** ~$76
- **CPU:** Rockchip RK3568 (Cortex-A55×4 @ 2.0 GHz)
- **RAM:** 4GB or 8GB LPDDR4
- **Flash:** none (eMMC module slot + M.2 NVMe)
- **USB:** USB 3.0 ×2, USB 2.0 ×2
- **Power:** 12V/2A DC barrel jack

## Connectivity

Ethernet Gigabit Ethernet (1000 Mbps)

## Components

- **Rockchip RK3568** (soc): Rockchip RK3568 quad-core Cortex-A55 SoC at 2.0 GHz with Mali-G52 GPU and 1 TOPS NPU for edge AI. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2021%2F0113%2F1274.html&ref=openhardware.directory&product=odroid-m1&source=md-export)

## Where to Buy

- [Hardkernel](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hardkernel.com%2Fshop%2Fodroid-m1-with-8gbyte-ram%2F&ref=openhardware.directory&product=odroid-m1&source=md-export) — 80.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hardkernel.com%2Fshop%2Fodroid-m1-with-8gbyte-ram%2F&ref=openhardware.directory&product=odroid-m1&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.odroid.com%2Fodroid-m1%2Fodroid-m1&ref=openhardware.directory&product=odroid-m1&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/odroid-m1)

---

# Le Potato

> Libre Computer Le Potato — Amlogic S905X SBC with 2GB DDR4, 4K HDMI output, and Raspberry Pi-compatible 85.6×56.5mm form factor, supported by mainline Linux, Armbian, and Raspbian-compatible images.

## Quick Facts

- **Brand:** Libre Computer
- **Price:** ~$45
- **CPU:** Amlogic S905X (Cortex-A53×4 @ 2.0GHz)
- **RAM:** 2GB DDR4
- **Flash:** 8GB eMMC
- **USB:** USB 2.0×4
- **Power:** 5V/2A micro-USB

## Connectivity

Ethernet Gigabit Ethernet

## Components

- **Amlogic S905X** (soc): Amlogic S905X quad-core Cortex-A53 @ 2.0GHz SoC with Mali-450 GPU, supports 4K H.265 decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdn.odroid.com%2FS905X%2FODROID-C2%2FAmlogic_S905X_Public_Datasheet_V1.1.4.pdf&ref=openhardware.directory&product=libre-computer-le-potato&source=md-export)

## Where to Buy

- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FLibre-Computer-AML-S905X-CC-Potato-64-bit%2Fdp%2FB074P6BNGZ&ref=openhardware.directory&product=libre-computer-le-potato&source=md-export) — $45.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flibre.computer%2Fproducts%2Faml-s905x-cc%2F&ref=openhardware.directory&product=libre-computer-le-potato&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fhub.libre.computer%2Ft%2Flibre-computer-board-aml-s905x-cc-le-potato-support-thread%2F&ref=openhardware.directory&product=libre-computer-le-potato&source=md-export)

## Tags

`sbc`, `amlogic`, `s905x`, `libre-computer`, `raspberry-pi-compatible`, `4k`, `media`, `linux-sbc`

---
[View full device page](https://openhardware.directory/s/1370/libre-computer-le-potato)

---

# Sweet Potato

> Libre Computer Sweet Potato — Amlogic S905X3 SBC with up to 4GB DDR4, 32GB eMMC, 4× USB 3.0, USB-C power, and 4K HDR output — a powerful upgrade over the Le Potato.

## Quick Facts

- **Brand:** Libre Computer
- **Price:** ~$60
- **CPU:** Amlogic S905X3 (Cortex-A55×4 @ 2.0GHz)
- **RAM:** 2GB / 4GB DDR4
- **Flash:** 8GB / 32GB eMMC
- **USB:** USB 3.0×4, USB-C
- **Power:** 5V/3A USB-C

## Connectivity

Ethernet Gigabit Ethernet

## Components

- **Amlogic S905X3** (soc): Amlogic S905X3 quad-core Cortex-A55 SoC with Mali-G31 GPU, supports 4K HDR decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdn.odroid.com%2FS905X3%2FODROID-HC4%2FAmlogic_S905X3_Datasheet_V0.1_Public.pdf&ref=openhardware.directory&product=libre-computer-sweet-potato&source=md-export)

## Where to Buy

- [LoveRPi](https://openhardware.directory/r?to=https%3A%2F%2Fwww.loverpi.com%2Fproducts%2Flibre-computer-board-aml-s905x-cc-v2&ref=openhardware.directory&product=libre-computer-sweet-potato&source=md-export) — $60.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flibre.computer%2Fproducts%2Faml-s905x3-cc%2F&ref=openhardware.directory&product=libre-computer-sweet-potato&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fhub.libre.computer%2Ft%2Flibre-computer-board-aml-s905x3-cc-sweet-potato%2F&ref=openhardware.directory&product=libre-computer-sweet-potato&source=md-export)

## Tags

`sbc`, `amlogic`, `s905x3`, `libre-computer`, `4k`, `media`, `linux-sbc`, `usb3`

---
[View full device page](https://openhardware.directory/s/1370/libre-computer-sweet-potato)

---

# LILYGO T-MixRF

> LILYGO T-MixRF is a multi-protocol RF development board combining SX1262 LoRa sub-GHz radio with CC1101 FSK/OOK transceiver for versatile wireless protocol support and RF experimentation.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$16.34
- **CPU:** SX1262 + CC1101 (radio module)
- **Flash:** N/A (radio module)
- **Power:** 3.3V

## Components

- **SX1262** (radio): Semtech SX1262 sub-GHz LoRa transceiver supporting 868/915 MHz for long-range communication with LoRa modulation — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-mixrf&source=md-export)
- **CC1101** (radio): Texas Instruments CC1101 low-power sub-GHz RF transceiver supporting FSK, GFSK, OOK, MSK modulations from 300 to 928 MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Fcc1101.pdf&ref=openhardware.directory&product=lilygo-t-mixrf&source=md-export)

## Protocols

- **SPI**
- **GPIO**

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-mixrf&ref=openhardware.directory&product=lilygo-t-mixrf&source=md-export) — $16.34

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-mixrf&ref=openhardware.directory&product=lilygo-t-mixrf&source=md-export)

## Tags

`sx1262`, `cc1101`, `lora`, `fsk`, `multi-protocol-rf`, `development-board`

---
[View full device page](https://openhardware.directory/s/1370/lilygo-t-mixrf)

---

# M5Stack ENV III Unit

> I2C environmental sensor unit with SHT30 temperature/humidity and QMP6988 barometric pressure sensors. Grove connector, compatible with M5Stack ecosystem.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** sensor-module
- **Price:** ~$8.5
- **CPU:** N/A (passive I2C sensor module)
- **RAM:** N/A
- **Flash:** N/A
- **Power:** 3.3V via Grove I2C
- **Dimensions:** 32.0 x 24.0 x 8.0 mm

## Components

- **SHT30** (Temperature/Humidity Sensor): Sensirion digital temperature (±0.2°C) and humidity (±2% RH) sensor with I2C interface at address 0x44 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsensirion.com%2Fproducts%2Fcatalog%2FSHT30-DIS-B&ref=openhardware.directory&product=m5stack-env-iii-unit&source=md-export)
- **QMP6988** (Pressure Sensor): High-accuracy barometric pressure sensor measuring 300-1100 hPa with ±3.9 Pa accuracy, I2C address 0x70 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fm5stack.oss-cn-shenzhen.aliyuncs.com%2Fresource%2Fdocs%2Fdatasheet%2Funit%2Fenviii%2FQMP6988%2520Datasheet.pdf&ref=openhardware.directory&product=m5stack-env-iii-unit&source=md-export)

## Protocols

- **I2C**
- **Grove**

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fenv-iii-unit&ref=openhardware.directory&product=m5stack-env-iii-unit&source=md-export) — $8.50

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fenv-iii-unit&ref=openhardware.directory&product=m5stack-env-iii-unit&source=md-export)

## Tags

`environmental-sensor`, `temperature`, `humidity`, `barometric-pressure`, `i2c`, `grove`, `m5stack`, `sensor-module`

---
[View full device page](https://openhardware.directory/s/1370/m5stack-env-iii-unit)

---

# HeishaMon Communication PCB

> Open-source ESP-based communication PCB for local monitoring and control of Panasonic Aquarea heat pumps via MQTT and HTTP, with Home Assistant integration and S0 energy metering support.

## Quick Facts

- **Brand:** TheHogNL
- **Board Type:** communication-pcb
- **Price:** ~$20
- **CPU:** ESP8266EX
- **RAM:** 80KB
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V USB-C or heat pump CN-CNT 5V

## Connectivity

WiFi 802.11 b/g/n | Ethernet 10/100 Mbps (W5500, large board only)

## Compatible Firmware

- heishamon
- arduino
- esphome

## Components

- **ESP8266EX** (mcu): Espressif ESP8266EX single-core Xtensa L106 WiFi SoC @ 80/160MHz with 802.11 b/g/n — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2F0a-esp8266ex_datasheet_en.pdf&ref=openhardware.directory&product=heishamon-communication-pcb&source=md-export)
- **level-shifter** (voltage-regulator): 5V to 3.3V bidirectional level shifter for Panasonic heat pump UART communication — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftxb0102.pdf&ref=openhardware.directory&product=heishamon-communication-pcb&source=md-export)
- **DS18B20** (temperature-sensor): Supported external 1-Wire digital temperature sensors connected to GPIO4 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.maximintegrated.com%2Fen%2Fds%2FDS18B20.pdf&ref=openhardware.directory&product=heishamon-communication-pcb&source=md-export)
- **W5500** (ethernet-phy): WIZnet W5500 10/100 Mbps hardwired TCP/IP Ethernet controller via SPI (large board only) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.wiznet.io%2Fimg%2Fproducts%2Fw5500%2FW5500_ds_v110e.pdf&ref=openhardware.directory&product=heishamon-communication-pcb&source=md-export)

## Protocols

- **UART**: GPIO13 (TX), GPIO15 (RX)
- **1-Wire**: GPIO4
- **S0 Pulse**: GPIO12 (meter 1), GPIO14 (meter 2)
- **SPI**: W5500 Ethernet (large board)
- **MQTT**
- **HTTP**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO2 | Debug LED | — | — |
| GPIO4 | 1-Wire (DS18B20 temperature sensors) | — | — |
| GPIO12 | S0 pulse meter input 1 | — | — |
| GPIO13 | UART TX to heat pump | — | — |
| GPIO14 | S0 pulse meter input 2 | — | — |
| GPIO15 | UART RX from heat pump | — | — |

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes
- **License:** GPL-3.0

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fthehognl%2Fheishamon-communication-pcb%2F&ref=openhardware.directory&product=heishamon-communication-pcb&source=md-export) — $20.00

## Available Software

- [HeishaMon Web Dashboard](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FEgyras%2FHeishaMon&ref=openhardware.directory&product=heishamon-communication-pcb&source=md-export)
- [Home Assistant Integration](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fkamaradclimber%2Fheishamon-homeassistant&ref=openhardware.directory&product=heishamon-communication-pcb&source=md-export)
- [Node-RED Control Flow](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fedterbak%2FNodeRed_Heishamon_control&ref=openhardware.directory&product=heishamon-communication-pcb&source=md-export)

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fthehognl%2Fheishamon-communication-pcb%2F&ref=openhardware.directory&product=heishamon-communication-pcb&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FEgyras%2FHeishaMon&ref=openhardware.directory&product=heishamon-communication-pcb&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FEgyras%2FHeishaMon%2Fwiki&ref=openhardware.directory&product=heishamon-communication-pcb&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FEgyras%2FHeishaMon%2Ftree%2Fmaster%2FSchematics&ref=openhardware.directory&product=heishamon-communication-pcb&source=md-export)

## Tags

`heat-pump`, `panasonic-aquarea`, `hvac`, `mqtt`, `home-assistant`, `esp8266`, `esp32-s3`, `energy-monitoring`, `1-wire`, `s0-pulse`

---
[View full device page](https://openhardware.directory/s/1370/heishamon-communication-pcb)

---

# TI SK-TDA4VM

> Texas Instruments SK-TDA4VM Starter Kit — automotive ADAS evaluation board with dual Cortex-A72, six Cortex-R5F real-time cores, and 8 TOPS MMA accelerator for autonomous driving prototyping.

## Quick Facts

- **Brand:** Texas Instruments
- **Board Type:** linux-sbc
- **Price:** ~$249
- **CPU:** ti-tda4vm
- **RAM:** 4GB LPDDR4
- **Flash:** none
- **USB:** USB-C
- **Power:** 12V DC

## Connectivity

Ethernet Gigabit

## Compatible Firmware

- armbian

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Where to Buy

- [TI Store](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Ftool%2FSK-TDA4VM&ref=openhardware.directory&product=ti-sk-tda4vm&source=md-export) — $249.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Ftool%2FSK-TDA4VM&ref=openhardware.directory&product=ti-sk-tda4vm&source=md-export)

## Tags

`linux-sbc`, `armbian`, `cortex-a72`, `cortex-r5f`, `automotive`, `adas`, `texas-instruments`, `developer-kit`

---
[View full device page](https://openhardware.directory/s/1370/ti-sk-tda4vm)

---

# Khadas VIM3

> High-performance single-board computer with the Amlogic A311D hexa-core SoC, up to 4GB DDR4 RAM, 5 TOPS NPU for AI inference, Wi-Fi 5, and USB-C PD — supported by Armbian.

## Quick Facts

- **Brand:** Khadas
- **Price:** ~$129
- **CPU:** Amlogic A311D
- **RAM:** 2GB / 4GB DDR4
- **Flash:** 16GB / 32GB eMMC
- **USB:** 3× USB-A + 1× USB-C + 1× USB-C (PD)
- **Power:** 5V–20V USB-C PD

## Connectivity

WiFi 802.11 a/b/g/n/ac (Wi-Fi 5, dual-band) | Bluetooth BLE 5.0 | Ethernet Gigabit Ethernet

## Components

- **Amlogic A311D** (soc): Amlogic A311D hexa-core SoC (Cortex-A73×4 + Cortex-A53×2) with Mali-G52 MP4 GPU and 5 TOPS NPU for AI tasks. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amlogic.com%2F%23Products%2F383%2Findex.html&ref=openhardware.directory&product=khadas-vim3&source=md-export)

## Where to Buy

- [Khadas](https://openhardware.directory/r?to=https%3A%2F%2Fwww.khadas.com%2Fproduct-page%2Fvim3&ref=openhardware.directory&product=khadas-vim3&source=md-export) — $129.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.khadas.com%2Fvim3&ref=openhardware.directory&product=khadas-vim3&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.khadas.com%2Fproducts%2Fsbc%2Fvim3%2F&ref=openhardware.directory&product=khadas-vim3&source=md-export)

## Tags

`sbc`, `amlogic`, `armbian`, `linux`, `ai`, `edge-ai`, `khadas`

---
[View full device page](https://openhardware.directory/s/1370/khadas-vim3)

---

# Rock 2F

> Radxa Rock 2F — ultra-compact Rockchip RK3528A SBC with 512MB/1GB/2GB DDR4, WiFi 4, Bluetooth 5.0, and 5V USB-C — the smallest and most affordable board in the Rock 2 family, with no built-in Ethernet.

## Quick Facts

- **Brand:** Radxa
- **Price:** ~$9.9
- **CPU:** Rockchip RK3528A (Cortex-A53×4 @ 2.0GHz)
- **RAM:** 512MB / 1GB / 2GB DDR4
- **Flash:** 4GB / 8GB / 16GB eMMC
- **USB:** USB 2.0, USB-C
- **Power:** 5V/2A USB-C

## Connectivity

WiFi 802.11n (WiFi 4) | Bluetooth BLE 5.0

## Components

- **Rockchip RK3528A** (soc): Rockchip RK3528A quad-core Cortex-A53 SoC with integrated Mali-450 GPU and 4K decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2023%2F0306%2F1844.html&ref=openhardware.directory&product=radxa-rock-2f&source=md-export)

## Where to Buy

- [Arace Tech](https://openhardware.directory/r?to=https%3A%2F%2Farace.tech%2Fproducts%2Fradxa-rock-2f&ref=openhardware.directory&product=radxa-rock-2f&source=md-export) — $9.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fradxa.com%2Fproducts%2Frock2%2F2f%2F&ref=openhardware.directory&product=radxa-rock-2f&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.radxa.com%2Fen%2Frock2%2Frock2f&ref=openhardware.directory&product=radxa-rock-2f&source=md-export)

## Tags

`sbc`, `rockchip`, `rk3528a`, `radxa`, `wifi4`, `bluetooth5`, `linux-sbc`, `compact`, `affordable`

---
[View full device page](https://openhardware.directory/s/1370/radxa-rock-2f)

---

# Heltec HT-M7603 Indoor LoRa Gateway

> Cost-effective 8-channel indoor LoRaWAN gateway based on MT7628 + SX1303/SX1250, supporting WiFi and Ethernet uplink with web-based configuration for TTN, ChirpStack, and custom MQTT servers.

## Quick Facts

- **Brand:** Heltec Automation
- **Board Type:** lorawan-gateway
- **Price:** ~$89
- **CPU:** MIPS 24KEc single-core @ 580MHz, HW crypto (AES-128/256)
- **RAM:** 64MB DDR2
- **Flash:** 16MB SPI NOR
- **USB:** USB 2.0 Host
- **Power:** 5V via DC adapter (included)
- **Dimensions:** 116 × 65 × 30mm

## Connectivity

WiFi 802.11 b/g/n 2.4GHz | Ethernet 10/100 Mbps

## Components

- **MT7628** (mcu): MediaTek MT7628 system-on-chip with MIPS 24KEc core at 580MHz, integrated 2T2R 802.11n WiFi, 5-port 10/100 Ethernet PHY, USB 2.0, PCIe, and AES-128/256 hardware crypto engine. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.seeedstudio.com%2Fproducts%2F114992470%2FMT7628_datasheet.pdf&ref=openhardware.directory&product=heltec-ht-m7603&source=md-export)
- **SX1303** (lora-baseband): Semtech SX1303 digital baseband processor for LoRa gateways, supporting 8 simultaneous channels with SF5-SF12 demodulation, fine timestamp capability for TDOA geolocation, and compatibility with SX1250/SX1255/SX1257 front-ends. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FpdfDocs%2FSemtech_DS_SX1303_W_APP_V12.pdf&ref=openhardware.directory&product=heltec-ht-m7603&source=md-export)
- **SX1250** (rf-transceiver): Semtech SX1250 half-duplex RF transceiver covering 150-960 MHz ISM bands with up to +22 dBm output power, built-in differential LNA, and SPI interface. Serves as the analog front-end for the SX1303 baseband processor. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2Fdatasheet%2F2%2F761%2FSemtech_10072019_DS_SX1250_V1.2-1660181.pdf&ref=openhardware.directory&product=heltec-ht-m7603&source=md-export)

## Protocols

- **Ethernet**: RJ45=Integrated 10/100 Mbps
- **WiFi**: Antenna=Built-in 2T2R
- **SPI**: SX1303=Internal
- **USB**: USB=USB 2.0 Host

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-m7603%2F&ref=openhardware.directory&product=heltec-ht-m7603&source=md-export) — 89.00
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-HT-M7603-Ethernet-Standard-915MHz%2Fdp%2FB0D3X1JDSN&ref=openhardware.directory&product=heltec-ht-m7603&source=md-export) — 89.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-m7603%2F&ref=openhardware.directory&product=heltec-ht-m7603&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltecDocs&ref=openhardware.directory&product=heltec-ht-m7603&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.org%2Fen%2Fgateway%2Fht-m7603%2Findex.html&ref=openhardware.directory&product=heltec-ht-m7603&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-M7603%2FHT-M7603.pdf&ref=openhardware.directory&product=heltec-ht-m7603&source=md-export)

## Tags

`lorawan`, `gateway`, `iot`, `lora`, `sx1303`, `mt7628`, `heltec`, `indoor`, `8-channel`

---
[View full device page](https://openhardware.directory/s/1370/heltec-ht-m7603)

---

# CubeCell AM01 Module V2 (HTCC-AM01)

> Ultra-compact 18x18mm LoRa/LoRaWAN module based on the ASR6502 SiP with integrated ARM Cortex-M0+ MCU and Semtech SX1262 transceiver. Features 3.5uA deep sleep, Arduino compatibility, and CE/FCC certification. Designed for SMT integration into custom IoT sensor nodes.

## Quick Facts

- **Brand:** Heltec
- **Board Type:** module
- **Price:** ~$9.9
- **CPU:** ARM Cortex-M0,single-core @ 48MHz
- **RAM:** 16KB SRAM
- **Flash:** 128KB
- **USB:** No
- **Power:** 3.3V
- **Dimensions:** 18 × 18 × 3mm

## Components

- **ASR6502** (mcu): ASR Micro ASR6502 System-in-Package integrating a 48MHz ARM Cortex-M0+ MCU (PSoC 4000 series) with Semtech SX1262 LoRa transceiver, 128KB flash, 16KB SRAM, and 8-channel DMA engine. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AM01_V2%2FHTCC-AM01_V2%28Rev1.1%29.pdf&ref=openhardware.directory&product=heltec-cubecell-am01-v2&source=md-export)
- **SX1262** (radio): Semtech SX1262 long-range, low-power sub-GHz RF transceiver integrated into the ASR6502 SiP, supporting 150-960MHz ISM bands with +22dBm TX power and LoRa/FSK modulation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F6%2Fb%2F5%2F1%2F4%2FSX1262_datasheet.pdf&ref=openhardware.directory&product=heltec-cubecell-am01-v2&source=md-export)

## Protocols

- **SPI**: SCK=GPIO1, MISO=GPIO2, MOSI=GPIO3
- **I2C**: SDA=GPIO4, SCL=GPIO5
- **UART**: TX=GPIO6, RX=GPIO7
- **SWD**: SWCLK=SWCLK, SWDIO=SWDIO
- **ADC**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO1 | SPI SCK / Digital IO | — | digital-input, digital-output, pwm |
| GPIO2 | SPI MISO / Digital IO | — | digital-input, digital-output, pwm |
| GPIO3 | SPI MOSI / Digital IO | — | digital-input, digital-output, pwm |
| GPIO4 | I2C SDA / Digital IO | — | digital-input, digital-output, pwm |
| GPIO5 | I2C SCL / Digital IO | — | digital-input, digital-output, pwm |
| GPIO6 | UART TX / Digital IO | — | digital-input, digital-output, pwm |
| GPIO7 | UART RX / Digital IO | — | digital-input, digital-output, pwm |
| ADC | 12-bit Analog Input | — | adc, digital-input |

## Where to Buy

- [Heltec Official](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhtcc-am01-v2%2F&ref=openhardware.directory&product=heltec-cubecell-am01-v2&source=md-export) — 9.90
- [Alibaba](https://openhardware.directory/r?to=https%3A%2F%2Fwww.alibaba.com%2Fproduct-detail%2FHeltec-iot-CubeCell-Module-HTCC-AM01_1600286671803.html&ref=openhardware.directory&product=heltec-cubecell-am01-v2&source=md-export) — 9.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhtcc-am01-v2%2F&ref=openhardware.directory&product=heltec-cubecell-am01-v2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FCubeCell-Arduino&ref=openhardware.directory&product=heltec-cubecell-am01-v2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.org%2Fen%2Fnode%2Fasr650x%2Fhtcc_am01%2Findex.html&ref=openhardware.directory&product=heltec-cubecell-am01-v2&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AM01_V2%2FHTCC-AM01_V2%28Rev1.1%29.pdf&ref=openhardware.directory&product=heltec-cubecell-am01-v2&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AM01_V2%2FHTCC-AM01_V2_Schematic_Diagram.pdf&ref=openhardware.directory&product=heltec-cubecell-am01-v2&source=md-export)

## Tags

`lora`, `lorawan`, `iot`, `low-power`, `asr6502`, `sx1262`, `cubecell`, `heltec`, `module`

## Certifications

CE, FCC

---
[View full device page](https://openhardware.directory/s/1370/heltec-cubecell-am01-v2)

---

# Brain BioAmp Band

> A stretchable, wearable multi-channel EEG electrode band by Upside Down Labs for recording brain signals. Available in 2-channel and 6-channel variants, it connects to BioAmp EXG Pill for brain-computer interface projects.

## Quick Facts

- **Brand:** Upside Down Labs
- **Board Type:** Wearable Sensor
- **Price:** ~$7.95
- **CPU:** N/A (passive accessory)
- **RAM:** N/A
- **Flash:** N/A
- **Power:** Passive (no power required)
- **Dimensions:** 15.5 inches (stretches to 31 inches)

## Components

- **EEG Snap Electrodes** (Sensor): Snap-style dry electrodes for EEG brain signal acquisition, available in 2-channel and 6-channel configurations — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fupsidedownlabs&ref=openhardware.directory&product=brain-bioamp-band&source=md-export)

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Where to Buy

- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fupsidedownlabs%2Fbrain-bioamp-band-multi-channel-eeg-band%2F&ref=openhardware.directory&product=brain-bioamp-band&source=md-export) — $7.95

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fupsidedownlabs%2Fbrain-bioamp-band-multi-channel-eeg-band%2F&ref=openhardware.directory&product=brain-bioamp-band&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fupsidedownlabs&ref=openhardware.directory&product=brain-bioamp-band&source=md-export)

## Tags

`eeg`, `brain-computer-interface`, `bci`, `neuroscience`, `wearable`, `biopotential`, `open-source-hardware`, `electrode-band`

---
[View full device page](https://openhardware.directory/s/1370/brain-bioamp-band)

---

# Waveshare RP2350-PiZero

> Raspberry Pi Zero-shaped development board with RP2350B MCU, 16MB flash, mini-HDMI DVI output, microSD card slot, PIO-USB port, lithium battery header, and 40-pin Raspberry Pi HAT-compatible GPIO header.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$9.99
- **CPU:** ARM Cortex-M33 / RISC-V Hazard3 dual-core @ 150MHz, FPU, DSP, TrustZone, HSTX, 12 PIO state machines
- **RAM:** 520KB SRAM
- **Flash:** 16MB
- **USB:** USB-C (USB 1.1 host/device) + PIO-USB
- **Power:** 5V via USB-C / 3.7V LiPo battery
- **Dimensions:** 65 x 30mm (estimated Pi Zero form factor)

## Components

- **RP2350B** (mcu): Raspberry Pi RP2350B dual-core microcontroller with switchable ARM Cortex-M33 and Hazard3 RISC-V cores at 150MHz, 520KB SRAM, 48 GPIO, HSTX for DVI output, 12 PIO state machines, and TrustZone security. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2350-pizero&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GP0 | UART0 TX / I2C0 SDA | — | digital-input, digital-output, pwm |
| GP1 | UART0 RX / I2C0 SCL | — | digital-input, digital-output, pwm |
| GP2 | I2C1 SDA / SPI0 SCK | — | digital-input, digital-output, pwm |
| GP3 | I2C1 SCL / SPI0 TX | — | digital-input, digital-output, pwm |
| GP4 | UART1 TX / SPI0 RX | — | digital-input, digital-output, pwm |
| GP5 | UART1 RX / SPI0 CSn | — | digital-input, digital-output, pwm |
| GP6 | SPI0 SCK | — | digital-input, digital-output, pwm |
| GP7 | SPI0 TX | — | digital-input, digital-output, pwm |
| GP8 | General GPIO | — | digital-input, digital-output, pwm |
| GP9 | General GPIO | — | digital-input, digital-output, pwm |
| GP10 | SPI1 SCK | — | digital-input, digital-output, pwm |
| GP11 | SPI1 TX | — | digital-input, digital-output, pwm |
| GP12 | SPI1 RX | — | digital-input, digital-output, pwm |
| GP13 | SPI1 CSn | — | digital-input, digital-output, pwm |
| GP14 | General GPIO | — | digital-input, digital-output, pwm |
| GP15 | General GPIO | — | digital-input, digital-output, pwm |
| GP16 | General GPIO | — | digital-input, digital-output, pwm |
| GP17 | General GPIO | — | digital-input, digital-output, pwm |
| GP18 | General GPIO | — | digital-input, digital-output, pwm |
| GP19 | General GPIO | — | digital-input, digital-output, pwm |
| GP20 | General GPIO | — | digital-input, digital-output, pwm |
| GP21 | General GPIO | — | digital-input, digital-output, pwm |
| GP22 | General GPIO | — | digital-input, digital-output, pwm |
| GP23 | General GPIO | — | digital-input, digital-output, pwm |
| GP24 | General GPIO | — | digital-input, digital-output, pwm |
| GP25 | General GPIO | — | digital-input, digital-output, pwm |
| GP26 | ADC0 | — | digital-input, digital-output, adc |
| GP27 | ADC1 | — | digital-input, digital-output, adc |

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2350-pizero.htm&ref=openhardware.directory&product=waveshare-rp2350-pizero&source=md-export) — 9.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2350-pizero.htm&ref=openhardware.directory&product=waveshare-rp2350-pizero&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRP2350-PiZero&ref=openhardware.directory&product=waveshare-rp2350-pizero&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2350-pizero&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FRP2350-PiZero%2FRP2350-PiZero.pdf&ref=openhardware.directory&product=waveshare-rp2350-pizero&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-rp2350-pizero)

---

# Waveshare RP2040-LoRa

> A compact RP2040-based LoRa module with SX1262 transceiver, available in 410-525MHz (LF) and 850-930MHz (HF) variants, featuring 2MB flash, 20 GPIO pins, IPEX antenna connector, and castellated edge design for embedded integration.

## Quick Facts

- **Brand:** Waveshare
- **Price:** ~$12.99
- **CPU:** ARM Cortex-M0+ dual-core @ 133MHz
- **RAM:** 264KB SRAM
- **Flash:** 2MB
- **USB:** USB-C (via adapter board)
- **Power:** 3.3V
- **Dimensions:** 21 × 41mm

## Components

- **RP2040** (mcu): Raspberry Pi RP2040 dual-core ARM Cortex-M0+ processor at 133MHz with 264KB SRAM, 8 PIO state machines, and USB 1.1 support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2040-lora&source=md-export)
- **SX1262** (radio): Semtech SX1262 long-range LoRa transceiver with +22dBm TX power, -148dBm sensitivity, supporting LoRa/FSK/GFSK modulation up to 256-byte packets. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fupload%2Fe%2Fe1%2FDS_SX1261-2_V1.2.pdf&ref=openhardware.directory&product=waveshare-rp2040-lora&source=md-export)

## Protocols

- **SPI** (SPI1 (LoRa)): SCK=GPIO14, MOSI=GPIO15, MISO=GPIO24, CS=GPIO13
- **UART** (UART0): TX=GPIO0, RX=GPIO1
- **I2C** (I2C0): SDA=GPIO4, SCL=GPIO5

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | UART0 TX | — | digital-input, digital-output, pwm |
| GPIO1 | UART0 RX | — | digital-input, digital-output, pwm |
| GPIO4 | I2C0 SDA | — | digital-input, digital-output, pwm |
| GPIO5 | I2C0 SCL | — | digital-input, digital-output, pwm |
| GPIO13 | SX1262 CS | — | digital-input, digital-output, pwm |
| GPIO14 | SX1262 SCK | — | digital-input, digital-output, pwm |
| GPIO15 | SX1262 MOSI | — | digital-input, digital-output, pwm |
| GPIO16 | SX1262 DIO1 | — | digital-input, digital-output, pwm |
| GPIO17 | SX1262 ANT SW | — | digital-input, digital-output, pwm |
| GPIO18 | SX1262 BUSY | — | digital-input |
| GPIO23 | SX1262 RST | — | digital-input, digital-output, pwm |
| GPIO24 | SX1262 MISO | — | digital-input, digital-output, pwm |
| GPIO26 | ADC0 | — | digital-input, digital-output, pwm, adc |
| GPIO27 | ADC1 | — | digital-input, digital-output, pwm, adc |
| GPIO28 | ADC2 | — | digital-input, digital-output, pwm, adc |
| GPIO29 | ADC3 | — | digital-input, digital-output, pwm, adc |

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2040-lora.htm&ref=openhardware.directory&product=waveshare-rp2040-lora&source=md-export) — 12.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2040-lora.htm&ref=openhardware.directory&product=waveshare-rp2040-lora&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2FPico_MircoPython_Examples&ref=openhardware.directory&product=waveshare-rp2040-lora&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRP2040-LoRa&ref=openhardware.directory&product=waveshare-rp2040-lora&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fupload%2Fe%2Fe1%2FDS_SX1261-2_V1.2.pdf&ref=openhardware.directory&product=waveshare-rp2040-lora&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FRP2040-LoRa%2FRp2040-lora-sch.pdf&ref=openhardware.directory&product=waveshare-rp2040-lora&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-rp2040-lora)

---

# Waveshare RP2350-CAN

> Pico-compatible development board with RP2350A MCU, onboard CAN V2.0B bus interface (XL2515 controller + SIT65HVD230DR transceiver), 4MB flash, 26 GPIO pins, castellated module design, and USB-C connectivity for automotive and industrial CAN bus applications.

## Quick Facts

- **Brand:** Waveshare
- **Board Type:** dev-board
- **Price:** ~$9.99
- **CPU:** ARM Cortex-M33 / RISC-V Hazard3 dual-core @ 150MHz, FPU, DSP, TrustZone, 12 PIO state machines
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C (USB 1.1 host/device)
- **Power:** 5V

## Components

- **RP2350A** (mcu): Raspberry Pi RP2350A dual-core microcontroller with switchable ARM Cortex-M33 and Hazard3 RISC-V cores at 150MHz, 520KB SRAM, 30 GPIO, and 12 PIO state machines. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2350-can&source=md-export)
- **XL2515** (can-controller): XL2515 stand-alone CAN controller with SPI interface, fully supporting CAN V2.0B specification with up to 1 Mbps data rate, multiple receive buffers, and mask/filter matching. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2Fcommon%2FXL2515_DataSheet_EN.pdf&ref=openhardware.directory&product=waveshare-rp2350-can&source=md-export)
- **SIT65HVD230DR** (can-transceiver): SIT65HVD230DR 3.3V CAN bus transceiver providing the physical differential bus interface between the XL2515 controller and the CAN bus wiring. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2Fcommon%2FSIT65HVD230DR_DataSheet_EN.pdf&ref=openhardware.directory&product=waveshare-rp2350-can&source=md-export)

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GP0 | UART0 TX / I2C0 SDA | — | digital-input, digital-output, pwm |
| GP1 | UART0 RX / I2C0 SCL | — | digital-input, digital-output, pwm |
| GP2 | I2C1 SDA / SPI0 SCK | — | digital-input, digital-output, pwm |
| GP3 | I2C1 SCL / SPI0 TX | — | digital-input, digital-output, pwm |
| GP4 | UART1 TX / SPI0 RX | — | digital-input, digital-output, pwm |
| GP5 | UART1 RX / SPI0 CSn | — | digital-input, digital-output, pwm |
| GP6 | General GPIO | — | digital-input, digital-output, pwm |
| GP7 | General GPIO | — | digital-input, digital-output, pwm |
| GP8 | General GPIO | — | digital-input, digital-output, pwm |
| GP9 | General GPIO | — | digital-input, digital-output, pwm |
| GP10 | SPI1 SCK | — | digital-input, digital-output, pwm |
| GP11 | SPI1 TX | — | digital-input, digital-output, pwm |
| GP12 | SPI1 RX | — | digital-input, digital-output, pwm |
| GP13 | SPI1 CSn | — | digital-input, digital-output, pwm |
| GP14 | General GPIO | — | digital-input, digital-output, pwm |
| GP15 | General GPIO | — | digital-input, digital-output, pwm |
| GP16 | General GPIO | — | digital-input, digital-output, pwm |
| GP17 | General GPIO | — | digital-input, digital-output, pwm |
| GP18 | General GPIO | — | digital-input, digital-output, pwm |
| GP19 | General GPIO | — | digital-input, digital-output, pwm |
| GP20 | General GPIO | — | digital-input, digital-output, pwm |
| GP21 | General GPIO | — | digital-input, digital-output, pwm |
| GP22 | General GPIO | — | digital-input, digital-output, pwm |
| GP26 | ADC0 | — | digital-input, digital-output, adc |
| GP27 | ADC1 | — | digital-input, digital-output, adc |
| GP28 | ADC2 | — | digital-input, digital-output, adc |

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2350-can.htm&ref=openhardware.directory&product=waveshare-rp2350-can&source=md-export) — 9.99

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2350-can.htm&ref=openhardware.directory&product=waveshare-rp2350-can&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRP2350-CAN&ref=openhardware.directory&product=waveshare-rp2350-can&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2350%2Frp2350-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2350-can&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FRP2350-CAN%2FRP2350-CAN-Schematic.pdf&ref=openhardware.directory&product=waveshare-rp2350-can&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-rp2350-can)

---

# Waveshare RP2040-BLE

> A compact RP2040-based module with Bluetooth 5.1 dual-mode (BLE + Classic SPP) connectivity, 2MB flash, 14 GPIO pins, ceramic antenna, and castellated edge design for embedded Bluetooth applications.

## Quick Facts

- **Brand:** Waveshare
- **Price:** ~$6.49
- **CPU:** ARM Cortex-M0+ dual-core @ 133MHz
- **RAM:** 264KB SRAM
- **Flash:** 2MB
- **USB:** USB-C (via adapter board)
- **Power:** 5V via VBUS pin or FPC connector
- **Dimensions:** 33.5 × 21mm

## Connectivity

Bluetooth Bluetooth 5.1 (BLE + Classic SPP)

## Components

- **RP2040** (mcu): Raspberry Pi RP2040 dual-core ARM Cortex-M0+ processor at 133MHz with 264KB SRAM, 8 PIO state machines, and USB 1.1 support. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2040-ble&source=md-export)

## Protocols

- **UART** (UART1 (Bluetooth)): TX=GPIO20, RX=GPIO21, STATUS=GPIO15
- **UART** (UART0): TX=GPIO0, RX=GPIO1
- **I2C** (I2C0): SDA=GPIO4, SCL=GPIO5
- **SPI** (SPI0): SCK=GPIO6, MOSI=GPIO7, MISO=GPIO4, CS=GPIO5

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | UART0 TX | — | digital-input, digital-output, pwm |
| GPIO1 | UART0 RX | — | digital-input, digital-output, pwm |
| GPIO2 | GPIO | — | digital-input, digital-output, pwm |
| GPIO3 | GPIO | — | digital-input, digital-output, pwm |
| GPIO4 | I2C0 SDA / SPI0 MISO | — | digital-input, digital-output, pwm |
| GPIO5 | I2C0 SCL / SPI0 CS | — | digital-input, digital-output, pwm |
| GPIO6 | SPI0 SCK | — | digital-input, digital-output, pwm |
| GPIO7 | SPI0 MOSI | — | digital-input, digital-output, pwm |
| GPIO15 | BLE Status | — | digital-input |
| GPIO20 | BLE UART TX | — | digital-input, digital-output, pwm |
| GPIO21 | BLE UART RX | — | digital-input, digital-output, pwm |
| GPIO26 | ADC0 | — | digital-input, digital-output, pwm, adc |
| GPIO27 | ADC1 | — | digital-input, digital-output, pwm, adc |
| GPIO28 | ADC2 | — | digital-input, digital-output, pwm, adc |

## Where to Buy

- [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2040-ble.htm&ref=openhardware.directory&product=waveshare-rp2040-ble&source=md-export) — 6.49

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Frp2040-ble.htm&ref=openhardware.directory&product=waveshare-rp2040-ble&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam%2FPico_MircoPython_Examples&ref=openhardware.directory&product=waveshare-rp2040-ble&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FRP2040-BLE&ref=openhardware.directory&product=waveshare-rp2040-ble&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheets.raspberrypi.com%2Frp2040%2Frp2040-datasheet.pdf&ref=openhardware.directory&product=waveshare-rp2040-ble&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FRP2040-BLE%2FRP2040-BLE.pdf&ref=openhardware.directory&product=waveshare-rp2040-ble&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/waveshare-rp2040-ble)

---

# Orange Pi 5

> The Orange Pi 5 is a high-performance single-board computer powered by the Rockchip RK3588S octa-core SoC, offering up to 16GB LPDDR4X RAM with USB 3.0, PCIe M.2, and 4K video output — ideal for demanding embedded Linux applications.

## Quick Facts

- **Brand:** Xunlong
- **Price:** ~$60
- **CPU:** Rockchip RK3588S — 4x Cortex-A76 @ 2.4GHz + 4x Cortex-A55 @ 1.8GHz
- **RAM:** 4GB / 8GB / 16GB LPDDR4X
- **Flash:** eMMC module + M.2 slot (NVMe/SATA)
- **USB:** 1x USB 3.0, 2x USB 2.0, 1x USB-C
- **Power:** USB-C Power Delivery

## Connectivity

WiFi Optional via M.2 module (AP6275P: 802.11 a/b/g/n/ac/ax) | Bluetooth Optional via M.2 module (BT 5.0) | Ethernet Gigabit Ethernet

## Components

- **RK3588S** (soc): Octa-core SoC with 4x Cortex-A76 + 4x Cortex-A55, Mali-G610 GPU, 6 TOPS NPU — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=orange-pi-5&source=md-export)

## Where to Buy

- [AliExpress](https://openhardware.directory/r?to=https%3A%2F%2Fwww.aliexpress.com%2Fstore%2F1553371&ref=openhardware.directory&product=orange-pi-5&source=md-export) — 60.00

## Links

- [product](https://openhardware.directory/r?to=http%3A%2F%2Fwww.orangepi.org%2Fhtml%2FhardWare%2FcomputerAndMicrocontrollers%2Fdetails%2FOrange-Pi-5.html&ref=openhardware.directory&product=orange-pi-5&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.armbian.com%2Forangepi-5%2F&ref=openhardware.directory&product=orange-pi-5&source=md-export)

## Tags

`sbc`, `linux`, `rockchip`, `rk3588s`, `arm64`, `4k`, `npu`, `nvme`, `armbian`

---
[View full device page](https://openhardware.directory/s/1370/orange-pi-5)

---

# Khadas VIM1

> Compact single-board computer powered by the Amlogic S905X quad-core SoC with 2GB DDR4 RAM, Wi-Fi, Bluetooth, and Gigabit Ethernet — supported by Armbian.

## Quick Facts

- **Brand:** Khadas
- **Price:** ~$49
- **CPU:** Amlogic S905X
- **RAM:** 2GB DDR4
- **Flash:** 8GB / 16GB eMMC
- **USB:** 2× USB-A + 1× USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 b/g/n | Bluetooth Bluetooth 4.1 | Ethernet Gigabit Ethernet

## Components

- **Amlogic S905X** (soc): Amlogic S905X quad-core Cortex-A53 @ 2.0GHz SoC with Mali-450 GPU, supports 4K H.265 decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amlogic.com%2F%23Products%2F93%2Findex.html&ref=openhardware.directory&product=khadas-vim1&source=md-export)

## Where to Buy

- [Khadas](https://openhardware.directory/r?to=https%3A%2F%2Fwww.khadas.com%2Fproduct-page%2Fkhadas-vim1&ref=openhardware.directory&product=khadas-vim1&source=md-export) — $49.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.khadas.com%2Fvim1&ref=openhardware.directory&product=khadas-vim1&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.khadas.com%2Fproducts%2Fsbc%2Fvim1%2F&ref=openhardware.directory&product=khadas-vim1&source=md-export)

## Tags

`sbc`, `amlogic`, `armbian`, `linux`, `media-center`, `khadas`

---
[View full device page](https://openhardware.directory/s/1370/khadas-vim1)

---

# ODROID N2+

> The ODROID N2+ is a powerful single-board computer from Hardkernel featuring the Amlogic S922X hexa-core SoC, 4GB DDR4 RAM, and Gigabit Ethernet. It excels as a media center, home automation hub, or general-purpose desktop replacement.

## Quick Facts

- **Brand:** Hardkernel
- **Price:** ~$65
- **CPU:** Amlogic S922X (Cortex-A73×4 @ 1.8GHz + Cortex-A53×2 @ 1.9GHz)
- **RAM:** 4GB DDR4
- **Flash:** none (eMMC module slot + SPI flash)
- **USB:** USB 3.0 ×4
- **Power:** 12V/2A DC barrel jack
- **Dimensions:** 90 × 90 mm

## Connectivity

Ethernet Gigabit Ethernet (1000 Mbps)

## Components

- **Amlogic S922X** (soc): Amlogic S922X hexa-core SoC with Cortex-A73×4 + Cortex-A53×2 cores and Mali-G52 GPU, supporting 4K HDR video decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amlogic.com%2F%23Products%2F383%2Findex.html&ref=openhardware.directory&product=odroid-n2-plus&source=md-export)

## Where to Buy

- [Hardkernel](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hardkernel.com%2Fshop%2Fodroid-n2-with-4gbyte-ram-2%2F&ref=openhardware.directory&product=odroid-n2-plus&source=md-export) — 65.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hardkernel.com%2Fshop%2Fodroid-n2-with-4gbyte-ram-2%2F&ref=openhardware.directory&product=odroid-n2-plus&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.odroid.com%2Fodroid-n2%2Fodroid-n2&ref=openhardware.directory&product=odroid-n2-plus&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/odroid-n2-plus)

---

# ODROID C4

> The ODROID C4 is a capable single-board computer from Hardkernel powered by the Amlogic S905X3 quad-core Cortex-A55 SoC with 4GB DDR4 RAM. It offers USB 3.0, Gigabit Ethernet, and eMMC support at an affordable price point.

## Quick Facts

- **Brand:** Hardkernel
- **Price:** ~$50
- **CPU:** Amlogic S905X3 (Cortex-A55×4 @ 2.0 GHz)
- **RAM:** 4GB DDR4
- **Flash:** none (eMMC module slot)
- **USB:** USB 3.0 ×1, USB 2.0 ×3
- **Power:** 12V/2A DC barrel jack

## Connectivity

Ethernet Gigabit Ethernet (1000 Mbps)

## Components

- **Amlogic S905X3** (soc): Amlogic S905X3 quad-core Cortex-A55 SoC with Mali-G31 GPU, supporting 4K HDR decode at up to 2.0 GHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amlogic.com%2F%23Products%2F393%2Findex.html&ref=openhardware.directory&product=odroid-c4&source=md-export)

## Where to Buy

- [Hardkernel](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hardkernel.com%2Fshop%2Fodroid-c4%2F&ref=openhardware.directory&product=odroid-c4&source=md-export) — 50.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hardkernel.com%2Fshop%2Fodroid-c4%2F&ref=openhardware.directory&product=odroid-c4&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.odroid.com%2Fodroid-c4%2Fodroid-c4&ref=openhardware.directory&product=odroid-c4&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/odroid-c4)

---

# Khadas VIM3L

> Affordable single-board computer with the Amlogic S905D3 quad-core SoC, up to 4GB DDR4 RAM, Wi-Fi 5, Gigabit Ethernet, and USB-C PD power — supported by Armbian.

## Quick Facts

- **Brand:** Khadas
- **Price:** ~$99
- **CPU:** Amlogic S905D3
- **RAM:** 2GB / 4GB DDR4
- **Flash:** 16GB / 32GB eMMC
- **USB:** 3× USB-A + 1× USB-C
- **Power:** 5V–20V USB-C PD

## Connectivity

WiFi 802.11 a/b/g/n/ac (Wi-Fi 5, dual-band) | Bluetooth BLE 5.0 | Ethernet Gigabit Ethernet

## Components

- **Amlogic S905D3** (soc): Amlogic S905D3 quad-core Cortex-A55 SoC with Mali-G31 GPU, supports 4K AV1 decode. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amlogic.com%2F%23Products%2F384%2Findex.html&ref=openhardware.directory&product=khadas-vim3l&source=md-export)

## Where to Buy

- [Khadas](https://openhardware.directory/r?to=https%3A%2F%2Fwww.khadas.com%2Fproduct-page%2Fvim3l-bare-board&ref=openhardware.directory&product=khadas-vim3l&source=md-export) — $99.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.khadas.com%2Fvim3l&ref=openhardware.directory&product=khadas-vim3l&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.khadas.com%2Fproducts%2Fsbc%2Fvim3l%2F&ref=openhardware.directory&product=khadas-vim3l&source=md-export)

## Tags

`sbc`, `amlogic`, `armbian`, `linux`, `media-center`, `khadas`

---
[View full device page](https://openhardware.directory/s/1370/khadas-vim3l)

---

# Khadas VIM1S

> Compact single-board computer with the Amlogic S905Y4 quad-core SoC, 4GB LPDDR4, 32GB eMMC, Wi-Fi 5, Bluetooth 5.1, and 100Mbps Ethernet — supported by Armbian.

## Quick Facts

- **Brand:** Khadas
- **Price:** ~$79
- **CPU:** Amlogic S905Y4
- **RAM:** 4GB LPDDR4
- **Flash:** 32GB eMMC
- **USB:** 1× USB-C + 1× USB-A
- **Power:** 5V

## Connectivity

WiFi 802.11 a/b/g/n/ac (Wi-Fi 5, dual-band) | Bluetooth Bluetooth 5.1 | Ethernet 100Mbps Ethernet

## Components

- **Amlogic S905Y4** (soc): Amlogic S905Y4 quad-core Cortex-A55 @ 2.0GHz SoC with Mali-G31 GPU, eMMC-only design. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amlogic.com%2F%23Products%2F386%2Findex.html&ref=openhardware.directory&product=khadas-vim1s&source=md-export)

## Where to Buy

- [Khadas](https://openhardware.directory/r?to=https%3A%2F%2Fwww.khadas.com%2Fproduct-page%2Fvim1s&ref=openhardware.directory&product=khadas-vim1s&source=md-export) — $79.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.khadas.com%2Fvim1s&ref=openhardware.directory&product=khadas-vim1s&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.khadas.com%2Fproducts%2Fsbc%2Fvim1s%2F&ref=openhardware.directory&product=khadas-vim1s&source=md-export)

## Tags

`sbc`, `amlogic`, `armbian`, `linux`, `media-center`, `khadas`

---
[View full device page](https://openhardware.directory/s/1370/khadas-vim1s)

---

# ODROID C2

> The ODROID C2 is a 64-bit single-board computer from Hardkernel featuring the Amlogic S905 quad-core Cortex-A53 SoC with 2GB DDR3 RAM and Gigabit Ethernet. It was one of the first affordable 64-bit ARM SBCs and remains supported by Armbian.

## Quick Facts

- **Brand:** Hardkernel
- **Price:** ~$46
- **CPU:** Amlogic S905 (Cortex-A53×4 @ 1.5 GHz)
- **RAM:** 2GB DDR3
- **Flash:** none (eMMC module slot)
- **USB:** USB 2.0 ×4
- **Power:** 5V/2A DC barrel jack

## Connectivity

Ethernet Gigabit Ethernet (1000 Mbps)

## Components

- **Amlogic S905** (soc): Amlogic S905 quad-core Cortex-A53 SoC at 1.5 GHz with Mali-450 GPU, one of the first popular 64-bit ARM media processors. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amlogic.com%2F%23Products%2F358%2Findex.html&ref=openhardware.directory&product=odroid-c2&source=md-export)

## Where to Buy

- [Hardkernel](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hardkernel.com%2Fshop%2Fodroid-c2%2F&ref=openhardware.directory&product=odroid-c2&source=md-export) — 46.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hardkernel.com%2Fshop%2Fodroid-c2%2F&ref=openhardware.directory&product=odroid-c2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.odroid.com%2Fodroid-c2%2Fodroid-c2&ref=openhardware.directory&product=odroid-c2&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/odroid-c2)

---

# NanoPi R6S

> FriendlyElec NanoPi R6S — compact RK3588S router SBC with triple Ethernet ports (2× 2.5GbE + 1× GbE), 4GB/8GB LPDDR4X RAM, and 32GB eMMC for high-performance network routing and edge computing.

## Quick Facts

- **Brand:** FriendlyElec
- **Price:** ~$167
- **CPU:** Rockchip RK3588S (Cortex-A76×4 @ 2.4GHz + Cortex-A55×4 @ 1.8GHz)
- **RAM:** 4GB / 8GB LPDDR4X
- **Flash:** 32GB eMMC
- **USB:** USB 3.0, USB-C
- **Power:** 12V DC barrel jack

## Connectivity

Ethernet 2× 2.5 Gigabit + 1× Gigabit Ethernet

## Components

- **Rockchip RK3588S** (soc): Rockchip RK3588S octa-core SoC (Cortex-A76×4 + Cortex-A55×4) with Mali-G610 GPU and 6 TOPS NPU. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=friendlyelec-nanopi-r6s&source=md-export)

## Where to Buy

- [FriendlyELEC](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D289&ref=openhardware.directory&product=friendlyelec-nanopi-r6s&source=md-export) — $167.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D289&ref=openhardware.directory&product=friendlyelec-nanopi-r6s&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_R6S&ref=openhardware.directory&product=friendlyelec-nanopi-r6s&source=md-export)

## Tags

`router`, `sbc`, `rk3588s`, `networking`, `friendlyelec`, `nanopi`, `linux-sbc`

---
[View full device page](https://openhardware.directory/s/1370/friendlyelec-nanopi-r6s)

---

# NanoPi M4 V2

> FriendlyElec NanoPi M4 V2 — RK3399 SBC with 4GB LPDDR4, 4× USB 3.0, M.2 expansion slot, eMMC module support, and 40-pin GPIO for demanding Linux desktop and NAS builds.

## Quick Facts

- **Brand:** FriendlyElec
- **Price:** ~$80
- **CPU:** Rockchip RK3399 (Cortex-A72×2 @ 1.8GHz + Cortex-A53×4 @ 1.5GHz)
- **RAM:** 4GB LPDDR4
- **Flash:** eMMC module slot (8–128GB optional)
- **USB:** USB 3.0×4, USB-C
- **Power:** 12V DC barrel jack

## Connectivity

Ethernet Gigabit Ethernet

## Components

- **Rockchip RK3399** (soc): Rockchip RK3399 hexa-core SoC (Cortex-A72×2 + Cortex-A53×4) with Mali-T860 GPU. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK33_Series%2F2016%2F0208%2F776.html&ref=openhardware.directory&product=friendlyelec-nanopi-m4-v2&source=md-export)

## Where to Buy

- [FriendlyELEC](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D268&ref=openhardware.directory&product=friendlyelec-nanopi-m4-v2&source=md-export) — $80.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D268&ref=openhardware.directory&product=friendlyelec-nanopi-m4-v2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_M4V2&ref=openhardware.directory&product=friendlyelec-nanopi-m4-v2&source=md-export)

## Tags

`sbc`, `rk3399`, `friendlyelec`, `nanopi`, `m4`, `m.2`, `linux-sbc`, `nas`

---
[View full device page](https://openhardware.directory/s/1370/friendlyelec-nanopi-m4-v2)

---

# Khadas VIM2

> Powerful single-board computer with the Amlogic S912 octa-core SoC, 3GB DDR4 RAM, dual-band Wi-Fi ac, Bluetooth 5.0, and Gigabit Ethernet — supported by Armbian.

## Quick Facts

- **Brand:** Khadas
- **Price:** ~$89.9
- **CPU:** Amlogic S912
- **RAM:** 3GB DDR4
- **Flash:** 16GB / 32GB eMMC
- **USB:** 2× USB-A + 1× USB-C
- **Power:** 5V

## Connectivity

WiFi 802.11 a/b/g/n/ac (dual-band) | Bluetooth BLE 5.0 | Ethernet Gigabit Ethernet

## Components

- **Amlogic S912** (soc): Amlogic S912 octa-core Cortex-A53 @ 1.5GHz SoC with Mali-T820 GPU, supports 4K H.265. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amlogic.com%2F%23Products%2F92%2Findex.html&ref=openhardware.directory&product=khadas-vim2&source=md-export)

## Where to Buy

- [Khadas](https://openhardware.directory/r?to=https%3A%2F%2Fwww.khadas.com%2Fproduct-page%2Fnew-vim2&ref=openhardware.directory&product=khadas-vim2&source=md-export) — $89.90

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.khadas.com%2Fvim2&ref=openhardware.directory&product=khadas-vim2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.khadas.com%2Fproducts%2Fsbc%2Fvim2%2F&ref=openhardware.directory&product=khadas-vim2&source=md-export)

## Tags

`sbc`, `amlogic`, `armbian`, `linux`, `media-center`, `khadas`

---
[View full device page](https://openhardware.directory/s/1370/khadas-vim2)

---

# NanoPi R4S

> FriendlyElec NanoPi R4S — RK3399-powered dual-Gigabit Ethernet router SBC with up to 4GB LPDDR4 RAM, 16GB eMMC, and microSD, popular for OpenWRT and home network gateway builds.

## Quick Facts

- **Brand:** FriendlyElec
- **Price:** ~$55
- **CPU:** Rockchip RK3399 (Cortex-A72×2 @ 1.8GHz + Cortex-A53×4 @ 1.5GHz)
- **RAM:** 1GB / 4GB LPDDR4
- **Flash:** 16GB eMMC
- **USB:** USB 3.0, USB-C
- **Power:** 12V DC barrel jack

## Connectivity

Ethernet 2× Gigabit Ethernet

## Components

- **Rockchip RK3399** (soc): Rockchip RK3399 hexa-core SoC (Cortex-A72×2 + Cortex-A53×4) with Mali-T860 GPU. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK33_Series%2F2016%2F0208%2F776.html&ref=openhardware.directory&product=friendlyelec-nanopi-r4s&source=md-export)

## Where to Buy

- [FriendlyELEC](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D284&ref=openhardware.directory&product=friendlyelec-nanopi-r4s&source=md-export) — $55.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.friendlyelec.com%2Findex.php%3Froute%3Dproduct%2Fproduct%26product_id%3D284&ref=openhardware.directory&product=friendlyelec-nanopi-r4s&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.friendlyelec.com%2Fwiki%2Findex.php%2FNanoPi_R4S&ref=openhardware.directory&product=friendlyelec-nanopi-r4s&source=md-export)

## Tags

`router`, `sbc`, `rk3399`, `networking`, `friendlyelec`, `nanopi`, `openwrt`, `linux-sbc`

---
[View full device page](https://openhardware.directory/s/1370/friendlyelec-nanopi-r4s)

---

# La Frite

> Libre Computer La Frite — ultra-compact Amlogic S805X SBC with 512MB/1GB DDR4, 8GB eMMC, and 5V micro-USB power in a credit-card form factor for lightweight Linux and IoT applications.

## Quick Facts

- **Brand:** Libre Computer
- **Price:** ~$25
- **CPU:** Amlogic S805X (Cortex-A35×4 @ 1.2GHz)
- **RAM:** 512MB / 1GB DDR4
- **Flash:** 8GB eMMC
- **USB:** USB 2.0
- **Power:** 5V/2A micro-USB

## Connectivity

Ethernet 100Mbps Ethernet

## Components

- **Amlogic S805X** (soc): Amlogic S805X quad-core Cortex-A35 SoC with Mali-450 GPU, designed for ultra-low-power embedded Linux. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amlogic.com%2F%23Products%2F369%2Findex.html&ref=openhardware.directory&product=libre-computer-la-frite&source=md-export)

## Where to Buy

- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FLibre-Computer-AML-S805X-AC-Frite-Single%2Fdp%2FB07T583QZ8&ref=openhardware.directory&product=libre-computer-la-frite&source=md-export) — $25.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flibre.computer%2Fproducts%2Faml-s805x-ac%2F&ref=openhardware.directory&product=libre-computer-la-frite&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fhub.libre.computer%2Ft%2Flibre-computer-board-aml-s805x-ac-la-frite-support-thread%2F&ref=openhardware.directory&product=libre-computer-la-frite&source=md-export)

## Tags

`sbc`, `amlogic`, `s805x`, `libre-computer`, `compact`, `linux-sbc`, `low-power`, `iot`

---
[View full device page](https://openhardware.directory/s/1370/libre-computer-la-frite)

---

# Heltec HT-M2802 Indoor LoRa Gateway

> Indoor edge computing LoRaWAN gateway with Rockchip RK3566 quad-core Cortex-A55 processor, SX1303+SX1250 8-channel LoRa radio, 2GB DDR4, 32GB eMMC, Gigabit Ethernet, dual-band WiFi, Bluetooth 4.0, and pre-installed Debian Linux with Docker support.

## Quick Facts

- **Brand:** Heltec Automation
- **Price:** ~$199
- **CPU:** ARM Cortex-A55 quad-core @ 1.8GHz, Mali-G52 GPU, 1 TOPS NPU
- **RAM:** 2GB DDR4
- **Flash:** 32GB eMMC 5.1
- **USB:** USB Type-C (firmware flashing)
- **Power:** 4.5-17V DC (12V 1.3A adapter included)
- **Dimensions:** 120 x 115 x 35mm

## Connectivity

WiFi 802.11 b/g/n 2.4GHz/5GHz | Bluetooth BT 4.0 (HS), BLE | Ethernet Gigabit (10/100/1000M)

## Components

- **RK3566** (soc): Rockchip RK3566 quad-core ARM Cortex-A55 @ 1.8GHz with Mali-G52 GPU, 1 TOPS NPU, running Debian 10 Linux with Docker pre-installed. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fuploads%2Fpdf%2F2022.8.26%2F192%2FRK3566%2520Brief%2520Datasheet.pdf&ref=openhardware.directory&product=heltec-ht-m2802&source=md-export)
- **SX1303** (lora-baseband): Semtech SX1303 digital baseband chip for LoRa gateways, supporting 8-channel simultaneous reception, Fine Timestamp for TDOA geolocation, and -139dBm sensitivity at SF12/125kHz. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2Fdatasheet%2F2%2F761%2FSemtech_DS_SX1303_W_APP_V1_2-1919724.pdf&ref=openhardware.directory&product=heltec-ht-m2802&source=md-export)
- **SX1250** (radio): Semtech SX1250 multi-band sub-GHz RF front-end (150-960MHz) designed for LoRa gateways, supporting up to +22dBm TX power in half-duplex mode with SX1303 baseband. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2Fdatasheet%2F2%2F761%2FSemtech_10072019_DS_SX1250_V1.2-1660181.pdf&ref=openhardware.directory&product=heltec-ht-m2802&source=md-export)

## Protocols

- **Ethernet**: RJ45=10/100/1000M Gigabit
- **SPI**
- **USB**: USB-C=Firmware flashing port

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-m2802%2F&ref=openhardware.directory&product=heltec-ht-m2802&source=md-export) — 199.00
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-HT-M2802-Gateway-Ethernet-US915%2Fdp%2FB0DJR4SZK7&ref=openhardware.directory&product=heltec-ht-m2802&source=md-export) — 199.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-m2802%2F&ref=openhardware.directory&product=heltec-ht-m2802&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation&ref=openhardware.directory&product=heltec-ht-m2802&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Florawan-application%2Flora-gateway%2Fht-m2802%2Fquick_start&ref=openhardware.directory&product=heltec-ht-m2802&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-2802%2FHT-M2802%2520Indoor%2520LoRa%2520Gateway.pdf&ref=openhardware.directory&product=heltec-ht-m2802&source=md-export)

## Tags

`lorawan`, `lora-gateway`, `iot`, `edge-computing`, `heltec`, `sx1303`, `rockchip`

---
[View full device page](https://openhardware.directory/s/1370/heltec-ht-m2802)

---

# Heltec HT-M02 Edge LoRa Gateway (V2)

> IP66 waterproof edge computing LoRaWAN gateway with Rockchip RK3566 quad-core Cortex-A55 SoC, SX1303+SX1250 8-channel LoRa concentrator, 2GB DDR4, 32GB eMMC, pre-installed Debian Linux with Docker, and optional LTE/WiFi/PoE connectivity.

## Quick Facts

- **Brand:** Heltec Automation
- **Board Type:** lorawan-gateway
- **Price:** ~$229
- **CPU:** ARM Cortex-A55 quad-core @ 1.8GHz, 64-bit ARMv8-A, NEON SIMD, VFPv4 FPU, Crypto Extensions, 0.8 TOPS NPU
- **RAM:** 2GB DDR4
- **Flash:** 32GB eMMC 5.1
- **USB:** USB 2.0 (firmware update)
- **Power:** 5V + PoE
- **Dimensions:** 125 × 125 × 52mm (165mm with mounting bracket)

## Connectivity

WiFi 802.11 b/g/n (optional) | Ethernet Gigabit

## Components

- **RK3566** (sbc): Rockchip RK3566 quad-core Cortex-A55 @ 1.8GHz with 0.8 TOPS NPU, Mali-G52 MP2 GPU, hardware crypto (AES/SHA), running Debian 10 Linux with Docker pre-installed. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fuploads%2Fpdf%2F2022.8.26%2F192%2FRK3566%2520Brief%2520Datasheet.pdf&ref=openhardware.directory&product=heltec-ht-m02-v2&source=md-export)
- **SX1303** (lora-baseband): Semtech SX1303 digital baseband processor with 8-channel simultaneous LoRa reception (SF5-SF12), Fine Timestamp for TDOA geolocation, and (G)FSK modem. Pin-compatible with SX1302. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2Fdatasheet%2F2%2F761%2FSemtech_DS_SX1303_W_APP_V1_2-1919724.pdf&ref=openhardware.directory&product=heltec-ht-m02-v2&source=md-export)
- **SX1250** (radio): Semtech SX1250 multi-band sub-GHz RF front end covering 150-960MHz with built-in LNA, up to +22dBm TX power, paired with SX1303 baseband for 8-channel gateway operation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2Fdatasheet%2F2%2F761%2FSemtech_10072019_DS_SX1250_V1.2-1660181.pdf&ref=openhardware.directory&product=heltec-ht-m02-v2&source=md-export)

## Protocols

- **Ethernet**: RJ45=10/100/1000 Mbps
- **UART**: TX=Debug TX, RX=Debug RX, GND=GND
- **SPI**
- **USB**: USB=USB 2.0

## Where to Buy

- [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-m02-v2%2F&ref=openhardware.directory&product=heltec-ht-m02-v2&source=md-export) — 229.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-m02-v2%2F&ref=openhardware.directory&product=heltec-ht-m02-v2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltecDocs&ref=openhardware.directory&product=heltec-ht-m02-v2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Florawan-application%2Flora-gateway%2Fht-m02_v2%2Fquick_start&ref=openhardware.directory&product=heltec-ht-m02-v2&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-M02_V2%2FHT-M02_Edge_LoRa_Gateway_V1.1.pdf&ref=openhardware.directory&product=heltec-ht-m02-v2&source=md-export)

## Tags

`lorawan`, `gateway`, `lora`, `iot`, `edge-computing`, `outdoor`, `ip66`, `linux`, `docker`, `rockchip`

---
[View full device page](https://openhardware.directory/s/1370/heltec-ht-m02-v2)

---

# Heltec HT-H7608 V2

> WiFi HaLow (802.11ah) router and IoT gateway with 2.4GHz dual-band, up to 1km+ range, mesh networking, Ethernet, and OpenWrt-compatible MT7628 SoC.

## Quick Facts

- **Brand:** Heltec Automation
- **Board Type:** router-gateway
- **Price:** ~$79
- **CPU:** MIPS 24KEc single-core @ 580MHz, AES128,256 HW crypto
- **RAM:** 128MB DDR2
- **Flash:** 32MB SPI
- **USB:** USB-C (power,network)
- **Power:** 5V
- **Dimensions:** 109 × 66 × 30.5mm

## Connectivity

WiFi 802.11ah (WiFi HaLow) + 802.11b/g/n (2.4GHz) | Ethernet 10/100 Mbps (RJ45)

## Components

- **MT7628** (soc): MediaTek MT7628 system-on-chip with 580MHz MIPS 24KEc CPU, 2T2R 802.11n WiFi radio, 5-port Fast Ethernet switch, USB 2.0 host, PCIe, and AES128/256 hardware crypto engine. Runs Linux/OpenWrt. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.seeedstudio.com%2Fproducts%2F114992470%2FMT7628_datasheet.pdf&ref=openhardware.directory&product=heltec-ht-h7608&source=md-export)
- **MM6108** (wifi-module): Morse Micro MM6108 IEEE 802.11ah WiFi HaLow SoC providing sub-1 GHz operation (850-950MHz), up to 32.5 Mbps data rate, 1/2/4/8 MHz channel bandwidth, with ultra-long range PA and high-linear LNA. Packaged in the HT-HC01 module. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.morsemicro.com%2Fwp-content%2Fuploads%2F2024%2F12%2FMM6108-Data-Sheet-v4.pdf&ref=openhardware.directory&product=heltec-ht-h7608&source=md-export)

## Protocols

- **Ethernet**: RJ45=10/100 Mbps
- **USB**: USB-C=USB 2.0 (power + network)
- **UART**
- **SPI**
- **I2C**
- **SDIO**: SDIO=SDIO 2.0 to HT-HC01 HaLow module

## Where to Buy

- [Heltec Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-h7608%2F&ref=openhardware.directory&product=heltec-ht-h7608&source=md-export) — 79.00
- [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHT-H7608-802-11ah-Dual-Band-Transmission-902-928MHz%2Fdp%2FB0F2HT6ZFX&ref=openhardware.directory&product=heltec-ht-h7608&source=md-export) — 79.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fht-h7608%2F&ref=openhardware.directory&product=heltec-ht-h7608&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FHeltecDocs&ref=openhardware.directory&product=heltec-ht-h7608&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fwifi-halow%2Fht-h7608%2F&ref=openhardware.directory&product=heltec-ht-h7608&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FHT-H7608%2FHT-H7608_1.0.pdf&ref=openhardware.directory&product=heltec-ht-h7608&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/heltec-ht-h7608)

---

# ODROID M2

> The ODROID M2 is Hardkernel's high-performance SBC featuring the Rockchip RK3588S octa-core SoC with up to 16GB LPDDR4X RAM, 2.5GbE networking, and M.2 NVMe storage. It targets demanding workloads including desktop computing, AI inference, and high-throughput network storage.

## Quick Facts

- **Brand:** Hardkernel
- **Price:** ~$109
- **CPU:** Rockchip RK3588S (Cortex-A76×4 @ 2.4 GHz + Cortex-A55×4 @ 1.8 GHz)
- **RAM:** 4GB / 8GB / 16GB LPDDR4X
- **Flash:** none (M.2 NVMe slot)
- **USB:** USB 3.0 ×2, USB 2.0 ×2
- **Power:** 12V/2A DC barrel jack

## Connectivity

Ethernet 2.5 Gigabit Ethernet (2500 Mbps)

## Components

- **Rockchip RK3588S** (soc): Rockchip RK3588S octa-core SoC (Cortex-A76×4 + Cortex-A55×4) with Mali-G610 GPU and 6 TOPS NPU. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.rock-chips.com%2Fa%2Fen%2Fproducts%2FRK35_Series%2F2022%2F0926%2F1660.html&ref=openhardware.directory&product=odroid-m2&source=md-export)

## Where to Buy

- [Hardkernel](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hardkernel.com%2Fshop%2Fodroid-m2-with-8gbyte-ram%2F&ref=openhardware.directory&product=odroid-m2&source=md-export) — 109.00

## Links

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.hardkernel.com%2Fshop%2Fodroid-m2-with-8gbyte-ram%2F&ref=openhardware.directory&product=odroid-m2&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.odroid.com%2Fodroid-m2%2Fodroid-m2&ref=openhardware.directory&product=odroid-m2&source=md-export)

---
[View full device page](https://openhardware.directory/s/1370/odroid-m2)

---
[View search results on Open Hardware Directory](https://openhardware.directory/devices/search/esp32-all-in-one-display-audio-buttons)