Adafruit bluetooth bluefruit low energy breakout board ble 4 0 adafruit 1697 p the adafruit bluefruit le nrf8001 breakout board acts as a simple serial link between your microcontroller and a bluetooth host device by handling the bluetooth communication part this board allows you to focus on your own software and hardware control your project from an app on your smartphone or tablet including reading the microcontroller analogue and digital inputs the bluetooth low energy isn t as encum