A standard Bluetooth module has to have HID firmware installed. [Dastardly] makes a homemade daughterboard–er, shield–to connect it to the Arduino. The result is a nice little sandwich with a ...

It’s really just an ATTiny85 – a favorite of the crowd that’s just slightly above Arduino ... an HM-10 Bluetooth 4.0 Low Energy module. This board was developed as a means to connect sensors ...