Bluetroller is a controller app for serial communication between your smartphone and other bluetooth devices (like HC06 HC05 or Arduino-controlled sensors) sending commands. Inside the application you can find several modes to do that: with the joystick mode you can send commands with a virtual joystick with the keyboard mode you can send text and overview all your communication flow with your device. This app can useful in context in which you use pre-programmed bluetooth devices and electronic controller like Arduino or similar.