Connection schema

Klipper Configuration U2C

Used with BIGTREETECH U2C module.

1. Enter the command

sudo nano /etc/network/interfaces.d/can0

in the SSH terminal and execute

allow-hotplug can0
 iface can0 can static
   bitrate 1000000
   up ifconfig $IFACE txqueuelen 1024

Set the CAN-BUS speed to 1M (it must be consistent with the speed set in the firmware (1000000) CAN bus speed), save (Ctrl+S) and exit (Ctrl+X) after modification, and enter.

sudo reboot

to restart Raspberry Pi.

2. Each device on CAN bus will generate a canbus_uuid according to the UID of MCU, to find each microcontroller device ID, make sure the hardware is powered on and wired correctly, and then run:

~/klippy-env/bin/python ~/klipper/scripts/canbus_query.py can0

3. If an uninitialized CAN device is detected, the above command will report the device's canbus_uuid. Found canbus_uuid=0e0d81e4210c

4. If Klipper has been running normally and connected to this device, then canbus_uuid will not be reported, which is normal.