BT Robot Controller uses UART serial communication protocol to transmit data wirelessly to your robotic rover over a bluetooth connection. The app features 3 modes: 1. Remote Controller The Remote Controller has 5 buttons respectively for Forward, Backward, Left, Right and Stop. When a button is pressed, the app transmits a specific character corresponding to that button using bluetooth serial (UART) communication protocol. 2. Voice Controller The Voice Controller has a "Command" button. It