Android code for an Arduino UNO based Mobile robot controlled using Bluetooth. Robot uses the BC04 Bluetooth module
https://punkisnail.wordpress.com/2014/05/13/bluetooth-controlled-mobile-robot/
http://www.instructables.com/id/Mobile-robot-controlled-using-bluetooth/
Arduino Uno Code
https://github.com/shane-taurean/Bluetooth_Robot_Arduino_Code