Problems setting up rpi mcu

General Discussion
1

Basic Information:

Printer Model: Ender 3
MCU / Printerboard: SKR mini e3 V3
klippy.log klippy.zip (5.7 KB)

Describe your issue:

I have a fresh install of mainsail, I am trying to get input shaping running but keep getting the issue
mcu ‘mcu’: Unable to connect Once the underlying issue is corrected, use the “FIRMWARE_RESTART” command to reset the firmware, reload the config, and restart the host software. Error configuring printer

I have tried to run this setup Measuring Resonances - Klipper documentation on a raspberry pi but I have no idea what I have done wrong.

2

From line 811 in your klippy.log

[mcu]
serial = /dev/serial/by-id/usb-Klipper_stm32g0b1xx_4C000E001150415833323520-if00
	serial: /dev/ttyAMA0
	restart_method: command

Delete “serial: /dev/ttyAMA0” in your printer.cfg

Good luck, hcet14

1 Like
3

I tried this now but unfortunately I’m still experiencing the same problem. I’ve also no completely reinstalled klipper but using the same config file I have the same issue which makes me wonder if my config has other issues?

4

Your section looks like:

[mcu]
serial = /dev/serial/by-id/usb-Klipper_stm32g0b1xx_4C000E001150415833323520-if00
	serial: /dev/ttyAMA0
	restart_method: command

restart_method: command: [Errno 2] No such file or directory: '/dev/serial/by-id/usb-Klipper_stm32g0b1xx_4C000E001150415833323520-if00\nserial: /dev/ttyAMA0\nrestart_method: command'

Please change it to:

[mcu]
serial: /dev/serial/by-id/usb-Klipper_stm32g0b1xx_4C000E001150415833323520-if00
restart_method: command

Important is to remove the indents at the beginning of the additional lines!

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5

So I tried this but I still have the issue where uncomment

[mcu rpi]
serial: /tmp/klipper_host_mcu

results in klipper not being able to communicate with the printer anymore. Commenting this out allows the printer to work fine though.

6

I doubt that the printer will work fine without a communication with the RPi…
Can you please upload your latest printer.cfg?

1 Like
7

In general, please always provide a corresponding klippy.log file.

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8

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