Problem mcu ‘mcu’: Unable to connect

[brvnomartins]

Basic Information:

[v] Printer Model: Neptune 4 pro
[v] MCU / Printerboard:
Host / SBC
[v
klippy.log (65.0 KB)
] klippy.log

Hello everyone. I’m having this problem that started to occur overnight.
“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.”

in printer.cfg in mcu line i have this:
[mcu]
serial: /dev/ttyS0
restart_method: command

Anyone can help me pls?

[EddyMI3D]

Hello @brvnomartins !

Have you cheked the USB connection to the Printer for proper functionality?

[brvnomartins]

Hi @EddyMI3D.

Are you talking about the external USB port? If so, yes it is working. I did the fix patch and update to the new version of elegoo directly via USB 4 times. I also tried directly via SHH without success.

When the machine go on, it gives this attached image.