Code that runs on the arduino.
Rust backend. Communicates to arduino and runs a webserver where post requests can be sent to containing the points of a drawing.
Web app where a line is painted using the mouse cursor.
To connect the Wiimote to the PC, I've used Dolphin emulator. To control the mouse using a Wiimote, I've used Touchmote. (At some point this stopped working, idk why.)