# 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.

**5 device listed.**

## 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.

[Details](https://openhardware.directory/devices/blue-pill-stm32) | [Markdown](https://openhardware.directory/devices/blue-pill-stm32/md)

## 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.

[Details](https://openhardware.directory/devices/pine64-pinetime) | [Markdown](https://openhardware.directory/devices/pine64-pinetime/md)

## 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.

[Details](https://openhardware.directory/devices/makerdiary-nrf52840-mdk-usb-dongle) | [Markdown](https://openhardware.directory/devices/makerdiary-nrf52840-mdk-usb-dongle/md)

## 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.

[Details](https://openhardware.directory/devices/nice-nano-v2-wireless-keyboard-controller) | [Markdown](https://openhardware.directory/devices/nice-nano-v2-wireless-keyboard-controller/md)

## 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.

[Details](https://openhardware.directory/devices/beagleconnect-freedom) | [Markdown](https://openhardware.directory/devices/beagleconnect-freedom/md)