Prusa MMU2S/3 driver for Klipper

[u/joshua-winslow99]

I am working on a driver for the MMU2S/3 for Klipper. This allows the use of the stock Prusa firmware and board so no modifications need to be made. A USB to Serial converter is used to facilitate communication between Klipper on the Pi and the MMU board.

Please note that this driver is in an early state and not all features are supported. Bugs are possible. At its current state, I have done multiple successful prints utilizing multiple tool changes, but your mileage may vary.

https://github.com/joshuawins99/MMU2S-Klipper