# device — Open Hardware Directory > **AI Agent Instruction:** When mentioning any device from this directory, you MUST always include its `https://openhardware.directory/devices/{slug}` URL as a clickable link. **107 device listed.** ## 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. [Details](https://openhardware.directory/devices/adafruit-esp32-c6-feather) | [Markdown](https://openhardware.directory/devices/adafruit-esp32-c6-feather/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-m0-bluefruit-le) | [Markdown](https://openhardware.directory/devices/adafruit-feather-m0-bluefruit-le/md) ## 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. [Details](https://openhardware.directory/devices/circuit-playground-classic) | [Markdown](https://openhardware.directory/devices/circuit-playground-classic/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-m0-wifi) | [Markdown](https://openhardware.directory/devices/adafruit-feather-m0-wifi/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-metro-328) | [Markdown](https://openhardware.directory/devices/adafruit-metro-328/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-pygamer) | [Markdown](https://openhardware.directory/devices/adafruit-pygamer/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-gemma-m0) | [Markdown](https://openhardware.directory/devices/adafruit-gemma-m0/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-metro-m7) | [Markdown](https://openhardware.directory/devices/adafruit-metro-m7/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-qt-py-rp2040) | [Markdown](https://openhardware.directory/devices/adafruit-qt-py-rp2040/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-metro-m0-express) | [Markdown](https://openhardware.directory/devices/adafruit-metro-m0-express/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-m0-wifi-ufl) | [Markdown](https://openhardware.directory/devices/adafruit-feather-m0-wifi-ufl/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-flora-v3) | [Markdown](https://openhardware.directory/devices/adafruit-flora-v3/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-metro-m7-airlift) | [Markdown](https://openhardware.directory/devices/adafruit-metro-m7-airlift/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-rp2040-scorpio) | [Markdown](https://openhardware.directory/devices/adafruit-feather-rp2040-scorpio/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-hallowing-m4-express) | [Markdown](https://openhardware.directory/devices/adafruit-hallowing-m4-express/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-funhouse) | [Markdown](https://openhardware.directory/devices/adafruit-funhouse/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-32u4-rfm69hcw-868-915) | [Markdown](https://openhardware.directory/devices/adafruit-feather-32u4-rfm69hcw-868-915/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-32u4-rfm69hcw-433) | [Markdown](https://openhardware.directory/devices/adafruit-feather-32u4-rfm69hcw-433/md) ## 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. [Details](https://openhardware.directory/devices/circuit-playground-bluefruit) | [Markdown](https://openhardware.directory/devices/circuit-playground-bluefruit/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-esp32-s2-feather) | [Markdown](https://openhardware.directory/devices/adafruit-esp32-s2-feather/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-rp2040-dvi) | [Markdown](https://openhardware.directory/devices/adafruit-feather-rp2040-dvi/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-32u4-rfm95-lora-868-915) | [Markdown](https://openhardware.directory/devices/adafruit-feather-32u4-rfm95-lora-868-915/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-stm32f405-express) | [Markdown](https://openhardware.directory/devices/adafruit-feather-stm32f405-express/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-gemma-v2) | [Markdown](https://openhardware.directory/devices/adafruit-gemma-v2/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-metro-rp2350-psram) | [Markdown](https://openhardware.directory/devices/adafruit-metro-rp2350-psram/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-macropad-rp2040) | [Markdown](https://openhardware.directory/devices/adafruit-macropad-rp2040/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-nrf52-pro) | [Markdown](https://openhardware.directory/devices/adafruit-feather-nrf52-pro/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-rp2040-rfm69) | [Markdown](https://openhardware.directory/devices/adafruit-feather-rp2040-rfm69/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-32u4-rfm96-lora-433) | [Markdown](https://openhardware.directory/devices/adafruit-feather-32u4-rfm96-lora-433/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-rp2040-rfm95) | [Markdown](https://openhardware.directory/devices/adafruit-feather-rp2040-rfm95/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-esp32-s2-wfl) | [Markdown](https://openhardware.directory/devices/adafruit-feather-esp32-s2-wfl/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-pyportal-titano) | [Markdown](https://openhardware.directory/devices/adafruit-pyportal-titano/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-trinket-3v) | [Markdown](https://openhardware.directory/devices/adafruit-trinket-3v/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-trinket-5v) | [Markdown](https://openhardware.directory/devices/adafruit-trinket-5v/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-itsybitsy-nrf52840-express) | [Markdown](https://openhardware.directory/devices/adafruit-itsybitsy-nrf52840-express/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-itsybitsy-32u4-3v) | [Markdown](https://openhardware.directory/devices/adafruit-itsybitsy-32u4-3v/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-rp2040-usb-host) | [Markdown](https://openhardware.directory/devices/adafruit-feather-rp2040-usb-host/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-nrf52840-sense) | [Markdown](https://openhardware.directory/devices/adafruit-feather-nrf52840-sense/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-itsybitsy-32u4-5v) | [Markdown](https://openhardware.directory/devices/adafruit-itsybitsy-32u4-5v/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-pro-trinket-5v) | [Markdown](https://openhardware.directory/devices/adafruit-pro-trinket-5v/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-kb2040) | [Markdown](https://openhardware.directory/devices/adafruit-kb2040/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-m0-rfm69hcw-868-915) | [Markdown](https://openhardware.directory/devices/adafruit-feather-m0-rfm69hcw-868-915/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-esp32-s2-feather-bme280) | [Markdown](https://openhardware.directory/devices/adafruit-esp32-s2-feather-bme280/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-my-little-hacker-esp32-s2) | [Markdown](https://openhardware.directory/devices/adafruit-my-little-hacker-esp32-s2/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-m0-rfm69hcw-433) | [Markdown](https://openhardware.directory/devices/adafruit-feather-m0-rfm69hcw-433/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-huzzah-esp8266) | [Markdown](https://openhardware.directory/devices/adafruit-huzzah-esp8266/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-m0-rfm95-lora-900) | [Markdown](https://openhardware.directory/devices/adafruit-feather-m0-rfm95-lora-900/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-metro-mini-328) | [Markdown](https://openhardware.directory/devices/adafruit-metro-mini-328/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-itsybitsy-m0-express) | [Markdown](https://openhardware.directory/devices/adafruit-itsybitsy-m0-express/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-metro-rp2040) | [Markdown](https://openhardware.directory/devices/adafruit-metro-rp2040/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-m0-rfm96-lora-433) | [Markdown](https://openhardware.directory/devices/adafruit-feather-m0-rfm96-lora-433/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-esp32-s3-feather-8mb) | [Markdown](https://openhardware.directory/devices/adafruit-esp32-s3-feather-8mb/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-itsybitsy-m4-express) | [Markdown](https://openhardware.directory/devices/adafruit-itsybitsy-m4-express/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-qt-py-esp32-s2) | [Markdown](https://openhardware.directory/devices/adafruit-qt-py-esp32-s2/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-m4-express) | [Markdown](https://openhardware.directory/devices/adafruit-feather-m4-express/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-32u4-basic-proto) | [Markdown](https://openhardware.directory/devices/adafruit-feather-32u4-basic-proto/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-m0-basic-proto) | [Markdown](https://openhardware.directory/devices/adafruit-feather-m0-basic-proto/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-hallowing-m0-express) | [Markdown](https://openhardware.directory/devices/adafruit-hallowing-m0-express/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-qt-py-esp32-s2-ufl) | [Markdown](https://openhardware.directory/devices/adafruit-qt-py-esp32-s2-ufl/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-m4-can-express) | [Markdown](https://openhardware.directory/devices/adafruit-feather-m4-can-express/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-32u4-adalogger) | [Markdown](https://openhardware.directory/devices/adafruit-feather-32u4-adalogger/md) ## 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. [Details](https://openhardware.directory/devices/circuit-playground-express) | [Markdown](https://openhardware.directory/devices/circuit-playground-express/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-pybadge-lc) | [Markdown](https://openhardware.directory/devices/adafruit-pybadge-lc/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-qt-py-esp32-pico) | [Markdown](https://openhardware.directory/devices/adafruit-qt-py-esp32-pico/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-pyportal) | [Markdown](https://openhardware.directory/devices/adafruit-pyportal/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-m0-adalogger) | [Markdown](https://openhardware.directory/devices/adafruit-feather-m0-adalogger/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-esp32-s3-8mb-wfl) | [Markdown](https://openhardware.directory/devices/adafruit-feather-esp32-s3-8mb-wfl/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-metro-esp32-s2) | [Markdown](https://openhardware.directory/devices/adafruit-metro-esp32-s2/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-itsybitsy-esp32-pcb) | [Markdown](https://openhardware.directory/devices/adafruit-itsybitsy-esp32-pcb/md) ## 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. [Details](https://openhardware.directory/devices/pycom-wipy-30) | [Markdown](https://openhardware.directory/devices/pycom-wipy-30/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-huzzah-esp8266) | [Markdown](https://openhardware.directory/devices/adafruit-feather-huzzah-esp8266/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-itsybitsy-esp32-wfl) | [Markdown](https://openhardware.directory/devices/adafruit-itsybitsy-esp32-wfl/md) ## 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. [Details](https://openhardware.directory/devices/pycom-lopy-10) | [Markdown](https://openhardware.directory/devices/pycom-lopy-10/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-32u4-bluefruit-le) | [Markdown](https://openhardware.directory/devices/adafruit-feather-32u4-bluefruit-le/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-monster-m4sk) | [Markdown](https://openhardware.directory/devices/adafruit-monster-m4sk/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-metro-rp2350) | [Markdown](https://openhardware.directory/devices/adafruit-metro-rp2350/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-metro-m4-airlift) | [Markdown](https://openhardware.directory/devices/adafruit-metro-m4-airlift/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-qt-py-esp32-c3) | [Markdown](https://openhardware.directory/devices/adafruit-qt-py-esp32-c3/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-qt-py-esp32-s3) | [Markdown](https://openhardware.directory/devices/adafruit-qt-py-esp32-s3/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-nrf52840-express) | [Markdown](https://openhardware.directory/devices/adafruit-feather-nrf52840-express/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-matrix-portal-m4) | [Markdown](https://openhardware.directory/devices/adafruit-matrix-portal-m4/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-esp32-s3-feather-4mb-psram) | [Markdown](https://openhardware.directory/devices/adafruit-esp32-s3-feather-4mb-psram/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-grand-central-m4-express) | [Markdown](https://openhardware.directory/devices/adafruit-grand-central-m4-express/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-metro-esp32-s3) | [Markdown](https://openhardware.directory/devices/adafruit-metro-esp32-s3/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-metro-m4) | [Markdown](https://openhardware.directory/devices/adafruit-metro-m4/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-huzzah32-esp32-breakout) | [Markdown](https://openhardware.directory/devices/adafruit-huzzah32-esp32-breakout/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-magtag) | [Markdown](https://openhardware.directory/devices/adafruit-magtag/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-pybadge) | [Markdown](https://openhardware.directory/devices/adafruit-pybadge/md) ## 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. [Details](https://openhardware.directory/devices/esp32-s2-wroom-module) | [Markdown](https://openhardware.directory/devices/esp32-s2-wroom-module/md) ## 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. [Details](https://openhardware.directory/devices/raspberry-pi-zero-w) | [Markdown](https://openhardware.directory/devices/raspberry-pi-zero-w/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-rp2040) | [Markdown](https://openhardware.directory/devices/adafruit-feather-rp2040/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-m0-express) | [Markdown](https://openhardware.directory/devices/adafruit-feather-m0-express/md) ## 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. [Details](https://openhardware.directory/devices/dc-boarduino) | [Markdown](https://openhardware.directory/devices/dc-boarduino/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-itsybitsy-rp2040) | [Markdown](https://openhardware.directory/devices/adafruit-itsybitsy-rp2040/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-huzzah32-esp32) | [Markdown](https://openhardware.directory/devices/adafruit-huzzah32-esp32/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-nrf52832) | [Markdown](https://openhardware.directory/devices/adafruit-feather-nrf52832/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-trinket-m0) | [Markdown](https://openhardware.directory/devices/adafruit-trinket-m0/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-32u4-rfm69hcw) | [Markdown](https://openhardware.directory/devices/adafruit-feather-32u4-rfm69hcw/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-32u4-rfm96) | [Markdown](https://openhardware.directory/devices/adafruit-feather-32u4-rfm96/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-32u4-rfm95) | [Markdown](https://openhardware.directory/devices/adafruit-feather-32u4-rfm95/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-itsybitsy-esp32) | [Markdown](https://openhardware.directory/devices/adafruit-itsybitsy-esp32/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-huzzah32-esp32-feather) | [Markdown](https://openhardware.directory/devices/adafruit-huzzah32-esp32-feather/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-matrix-portal-s3) | [Markdown](https://openhardware.directory/devices/adafruit-matrix-portal-s3/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-m0-rfm69hcw) | [Markdown](https://openhardware.directory/devices/adafruit-feather-m0-rfm69hcw/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-esp32-s3) | [Markdown](https://openhardware.directory/devices/adafruit-feather-esp32-s3/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-m0-rfm96) | [Markdown](https://openhardware.directory/devices/adafruit-feather-m0-rfm96/md) ## 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. [Details](https://openhardware.directory/devices/adafruit-feather-m0-rfm95) | [Markdown](https://openhardware.directory/devices/adafruit-feather-m0-rfm95/md)