# 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.

**12 device listed.**

## 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.

[Details](https://openhardware.directory/devices/dfrobot-beetle-cm-32u4) | [Markdown](https://openhardware.directory/devices/dfrobot-beetle-cm-32u4/md)

## 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.

[Details](https://openhardware.directory/devices/dfrobot-beetle-esp32-c3) | [Markdown](https://openhardware.directory/devices/dfrobot-beetle-esp32-c3/md)

## 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.

[Details](https://openhardware.directory/devices/dfrobot-beetle-esp32) | [Markdown](https://openhardware.directory/devices/dfrobot-beetle-esp32/md)

## 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.

[Details](https://openhardware.directory/devices/dfrobot-beetle-rp2040) | [Markdown](https://openhardware.directory/devices/dfrobot-beetle-rp2040/md)

## 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.

[Details](https://openhardware.directory/devices/dfrobot-beetle-rp2350) | [Markdown](https://openhardware.directory/devices/dfrobot-beetle-rp2350/md)

## 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.

[Details](https://openhardware.directory/devices/dfrobot-beetle-ble) | [Markdown](https://openhardware.directory/devices/dfrobot-beetle-ble/md)

## 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.

[Details](https://openhardware.directory/devices/dfrobot-beetle-board) | [Markdown](https://openhardware.directory/devices/dfrobot-beetle-board/md)

## 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.

[Details](https://openhardware.directory/devices/waveshare-rp2040-ble) | [Markdown](https://openhardware.directory/devices/waveshare-rp2040-ble/md)

## 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.

[Details](https://openhardware.directory/devices/seeed-xiao-esp32c6) | [Markdown](https://openhardware.directory/devices/seeed-xiao-esp32c6/md)

## 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.

[Details](https://openhardware.directory/devices/wifi-lora-32-v3) | [Markdown](https://openhardware.directory/devices/wifi-lora-32-v3/md)

## 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.

[Details](https://openhardware.directory/devices/wifi-lora-32-v4) | [Markdown](https://openhardware.directory/devices/wifi-lora-32-v4/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)