With this app you can control your Arduino RC CAR using a bluetooth hc-05 or hc-06 module and your android phone. Here is a list of bluetooth signals which the app sends: Button - bluetooth command. Up - F. Down - B. Left - L. Right - R. Up+right - I. Up+left - G. Down+right - J. Down+left - H. Front Lights on: W. Front Lights off: w. Back lights on: U. Back lights off: u.