# 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.

**3 device listed.**

## 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 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 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)