It’s hard to imagine an easier way to set up communications between an Android device and an Arduino ... Hardware for the project comes in a couple of parts. The Bluetooth module wants 3.3v ...

The project uses ... it to work on 5V. An Arduino mini pro provides the brains. A FT-232 USB to serial board is used to program the Arduino. A standard Bluetooth module has to have HID firmware ...

Arduino boards get a Bluetooth Smart dev kit from Nordic Semiconductor. The SDK is compatible with a range of Arduino, ChipKIT shields that employ the nRF8001 Bluetooth Smart connectivity device.