MKS Skipr works with integrated CANbus only in one case now - MCU flashed firmware with USB to CAN bridge option and board connected usb itself from PI side to MCU side.
Problem is firmware compiler not have an option UART to CAN bridge. Originally PI side connects to MCU side of the board with UART and in this case you are unable to use internal canbus of MCU, firmware not have a translator. I make a post here about new feature request, but it ignored. I think need a pull request on github for support our board and new mode to compiler (uart to can bridge). I try manually edit config before compiling firmware to MCU but without succes, compilation stops with error about uart. i am not so expirienced with coding.
Now my system works in usb to can mode. Board connect itself from pi side to mcu side with usb cable, canbus connect directly from micromolex port of the board to mks thr42 toolhead with firmware compiled to toolhead and mcu from original klipper repository.
