Upgrade your old projects with bluetooth and control them using virtual joystick. Using this app you can control your project using virtual joystick or bluetooth terminal. It works with any HC-05, HC-06 and other BT Serial modules.

Note: This app requires hardware (Arduino, HC-05 etc) to work properly. It is specifically for hobbyists and engineering students.
For complete tutorial and code check out this link: http://mhassaan.azurewebsites.net/2016/12/01/step-by-step-bluetooth-controlled-car/