mcu 'mcu': unable to connect Klipper Error in vMinion
The other day I decided to run a full software update on my vMinion printer. Immediately after the update I was able to complete several prints without any problems. I shut the printer down at the end of the day, and when I restarted it the next morning I received the following error message: mcu 'mcu': unable to connect. I've tried rebooting and restarting the printer but the error persists. It seems that something broke during the updating process. I've attached the moonraker.log and klipper.log files I'm able to download and the printer.cfg. I'd provide a debug.zip file but when I attempt to connect to the configurator page I receive a 502 bad gateway error screen. Does anyone have any suggestions on how to solve this problem? Thanks!
Solution:Jump to solution
I solved the problem via these steps: 1) Used SSH to find MCU serial path with the following command: ls /dev/serial/by-id/* and copied the path delivered by the command. 2) I then opened printer.cfg and added a mcu section. 3) I then pasted the serial path copied in step 1 into the mcu section as follows: serial: /dev/serial/by-id/usb-Klipper_stm32f429xx_btt-skr-2-429-if00. 4) I saved the printer.cfg and restarted the printer. On restart, connection problem was eliminated.
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Solution
I solved the problem via these steps: 1) Used SSH to find MCU serial path with the following command: ls /dev/serial/by-id/* and copied the path delivered by the command. 2) I then opened printer.cfg and added a mcu section. 3) I then pasted the serial path copied in step 1 into the mcu section as follows: serial: /dev/serial/by-id/usb-Klipper_stm32f429xx_btt-skr-2-429-if00. 4) I saved the printer.cfg and restarted the printer. On restart, connection problem was eliminated.
this will cause future problems because it is not the path that ratos is expecting. So, it now will no longer be able to do automatic flashing when there are updates