Ender 3 V2 Neo: internal Pi Zero 2 W mod
Klipper on a Pi Zero 2W hidden in the printer base, powered and serial-fed from the stock 4.2.2 display header over UART. Full build, firmware rebuild, Pi host setup, and troubleshooting.
Klipper
Reverse-engineering the K2 Plus locked Klipper fork
Full system trace of the Creality K2 Plus: SoC, boot, IPC, the RS485 CFS bus, and the Cython-compiled Klipper modules - plus the techniques to read those modules without the source and rewrite them in Python.