The HC-05, a Bluetooth to serial bridge, can be found for around $5 on the internet and therefore may be the cheapest way to add Bluetooth connectivity to your project. However, its default setting… ...

It all starts with the HC-05 Bluetooth module, which is meant to transfer serial data, but which can be converted into a general-purpose device costing ten times as much with a simple Flash ROM ...

You can access BT SPP in your Arduino code, treat it as a serial device and connect to your Edison project via Android phone with BT SPP App. This means you can control your Edison projects ...