Mcu 'mcu': Unable to connect Neptune 3 Pro

General Discussion
1

Basic Information:

Printer Model: Elegoo Neptun 3 Pro
Host / SBC: Raspberry pi 3b+

printer.cfg (4.7 KB)
klippy (2).log (14.5 KB)

Everything was working on these settings before.

A little backstory:
I had a clogged nozzle and when I cleaned it, the SBC stopped seeing the printer.
I tried to reflash everything, but it didn’t help.

Now it writes the following error: mcu ‘mcu’: Unable to connect

I Tried:

  1. Reflash the Raspberry PI
  2. Reflash the printer (configured the firmware file, named it differently than in the previous firmware downloaded to SD, inserted into the printer, turned on the printer, waited for a while, then restarted the printer and connected the cable to the Raspberry
    ).
  3. Replace the cable.

Please help to solve this problem.

2

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