# 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. **20 device listed.** ## 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. [Details](https://openhardware.directory/devices/dfrobot-firebeetle-2-m0) | [Markdown](https://openhardware.directory/devices/dfrobot-firebeetle-2-m0/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) ## 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 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) ## 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. [Details](https://openhardware.directory/devices/arduino-mkr1000) | [Markdown](https://openhardware.directory/devices/arduino-mkr1000/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 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 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 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) ## 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) ## 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. [Details](https://openhardware.directory/devices/arduino-mkr-wifi-1010) | [Markdown](https://openhardware.directory/devices/arduino-mkr-wifi-1010/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) ## 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 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 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) ## 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. [Details](https://openhardware.directory/devices/arduino-uno-r4-wifi) | [Markdown](https://openhardware.directory/devices/arduino-uno-r4-wifi/md) ## 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. [Details](https://openhardware.directory/devices/arduino-uno-r4-minima) | [Markdown](https://openhardware.directory/devices/arduino-uno-r4-minima/md) ## 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. [Details](https://openhardware.directory/devices/arduino-nano-r4) | [Markdown](https://openhardware.directory/devices/arduino-nano-r4/md) ## 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. [Details](https://openhardware.directory/devices/arduino-mkr-wan-1310) | [Markdown](https://openhardware.directory/devices/arduino-mkr-wan-1310/md)