1. DuoResources for the RedBear Duo IoT development board.
2. Nrf5xnRF51822 and nRF52832 based baords, e.g. BLE Nano, RBL_nRF51822, Nano 2 and Blend 2
3. Iot phatWiFi + Bluetooth, designed for the Raspberry Pi Zero
4. STM32-ArduinoUse Arduino IDE to develop STM32 MCU (e.g. RedBear Duo) firmware.