The input device is a modified bicylce. 

Sensor Calibration:
To calibrate the steering angle, press the calibrat button underneath the OLED screen.
The screen will tell you to move the handlebar to it's max positions (-100% left, 100% right).
Only move the handlebar to around 90 degrees, otherwise you might break something.
Center the handlebar and wait for the calibration to finish.

Flashing the Firmware:
The microcontroller is programmed using the Arduino IDE. 
The IDE has to be prepared beforehand in order to program the device as an X-Input device.
The XInput library page has a tutorial on that: https://github.com/dmadison/ArduinoXInput
After the Board has been configured as an X-Input device, it can not be programmed in the normal way.
To program the board hit upload in the Arduino IDE. When the IDE shows "uploading..." press the reset button (bottom of the control board) 2 times.
