Mcu 'mcu': Unable to open serial port

General Discussion
1

Basic Information:

Printer Model: Ender 3 S1
MCU / Printerboard: Creality Slient Board 4.2.7
klippy.log
klippy.log (18.6 KB)

Describe your issue: After one failed print and a firmware reset, Klipper says it cant find/locate MCU. I swapped out the Board, USB Cable, and uninstall klipper/Mainsail.The error would lead me to the same error. I used the “ls /dev/serial/by-id/” while SSH and it says it couldnt identify a MCU.

…

2

Hello @FruitSamuraG !

Have you checked the serial ID?

3

Hello, I found the root of the problem. This is related to an OS update which holds the Debian bug. I have SSH into it and revert it back to V3.

1 Like