You will need the Arduino IDE and Processing application. Download and install each using the following:

https://processing.org/download/

https://www.arduino.cc/en/Main/Software

This sketch requires the ControlP5 (Button elements) and Serial (data communication) libraries. 

Ensure the libraries are installed by navigating to Sketch -> Import Library -> Add Library

Plugin your Arduino Nano using a USB cable. If needed, install drivers. Once complete, select the appropriate Board Type and COM port under Tools

Verify that the provided .ino file compiles and upload the sketch

WORK IN PROGRESS

The following should be the path from to computer to chair

Computer -> USB Cable -> Arduino Nano -> DB9 Connector -> Serial Cable -> Wheelchair

Open the Processing sketch (openDrive.pde) and run the application. You should see that the chair is connected.