Mcu 'rpi': Unable to open port: [Errno 2] No such file or directory: '/tmp/klipper_host_mcu'

General Discussion
1

Basic Information:

Printer Model: Ender 3 Pro
MCU / Printerboard: Creality 4.2.2
klippy.log

Describe your issue:

I am trying to use rpi as second controller. I used the guide : RPi microcontroller - Klipper documentation

I keep getting the error :
“mcu ‘rpi’: Unable to open port: [Errno 2] No such file or directory: ‘/tmp/klipper_host_mcu’”

I checked the /tmp folder and do not see the file there.
klippy.log (3.0 MB)

2

Hi. Have you rebooted since you set up the klipper-mcu service? If not, check if the service is running:

service klipper-mcu status

If this returns anything else than “active”, try:

service klipper-mcu start

The klipper-mcu service needs to be running, otherwise you get a connection error.
If the klipper-mcu service doesn’t autostart at boot, rerun the systemclt command in the guide.

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