CANBUS Mode

To put the H36 board into CAN mode (instead of USB mode) you simply need to make sure the Katapult and Klipper firmware settings (further down below) have the “GPIO pins to set at micro-controller startup” set correctly. For CAN mode this needs to be !PA2

120 ohm Termination Resistor

The H36 board has a 120 ohm termination resistor enabled by default. If you need to disable this you need desolder the bridge on the back of the board

DFU Mode

To put the H36 into DFU mode, connect it via USB to the Pi using the USB-C port then hold the BOOT0 button, press and release the RESET button, then count to 5 and release the BOOT0 button.

Katapult Config

Klipper Config

Sample Config

A sample config file can be found at https://github.com/FYSETC/H36_Combo/tree/main

More Info

More information can be found at the H36 wiki