Klipper unable to connect to MCU after exhausting other support materials I could find

General Discussion
1

Basic Information:

Printer Model: Ender 3 V3 SE
MCU / Printerboard: Stock
Host / SBC: Raspberry Pi 4b, Raspberry Pi OS debian 12 (bookworm) base
klippy.log (168.7 KB)

Describe your issue:

I have been trying to get klipper working using a firmware that enables use of the stock display but I have run into issues with the MCU not being able to connect as shown in my klippy.log and can’t work out why, as in my printer.cfg I have the serial listed as below in my mcu section:

[mcu]
serial: /dev/serial/by-id/usb-1a86_USB_Serial-if00-port0
restart_method: command

and I have also ensured that the serial thing is correct by using.
ls -l /dev/serial/by-id/
and correctly entering into my printer.cfg so I have no idea where this

mcu 'mcu': Unable to open serial port: [Errno 2] could not open port /dev/serial/by-id/<your-mcu-id>: [Errno 2] No such file or directory: '/dev/serial/by-id/<your-mcu-id>'

is coming from.

Any suggestions would be greatly appreciated

2

Just as a check, try dropping back to Debian 11 (bullseye)

3

Will do, I’ll update if it works.

4

Got it working by doing another fresh klipper install, don’t know why it didn’t work the first 3 times, but thanks.

1 Like
5

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