Basic Information: Printer Model: Prusa i3MK3S+ MCU / Printerboard: Einsy Host / SBC RPi5 klippy.log Fill out above information and in all cases attach your klippy.log file (use zip to compress it, if too big). Pasting your printer.cfg is not needed Be sure to check our “Knowledge Base” Cat…

I can’t find anything suspicious during shutdown. The only suspicious thing that you have is a large number of invalid/retransmitted bytes. Probably it is the same: MCU 'mcu' shutdown error Did you update your USB2UART bridge firmware as suggested before?

Thanks for checking. How to update the USB2UART bridge firmware properly?

FYI, Arksine also provided another link describing the solution: Lost communication with MCU and MCU shutdown: Timer too close after updating - #3 by Arksine Note that print failures will continue to be a problem until the underlying issue with the usb chip is addressed. -Kevin

Firmware shutdown twice this morning so I tried to fix the usb chip using the link provided. GitHub - PrusaOwners/mk3-32u2-firmware: Updated Atmega 32u2 Firmware for the Einsy Rambo After connecting the wires between the i3MK3S+ board and the Arduino UNO, where do I enter the commands to backup th…

The tutorial link in the instructions is broken… [image] I think this is where it was supposed to go: https://support.arduino.cc/hc/en-us/articles/4733418441116-Upload-a-sketch-in-Arduino-IDE You need ArdiunoIDE on your PC to load the sketch onto the Uno. AFTER the sketch is loaded proceed with…

OK. I have flashed a new firmware to Einsy using the following steps up to Verify the installation. GitHub - PrusaOwners/mk3-32u2-firmware: Updated Atmega 32u2 Firmware for the Einsy Rambo It seems to have verfieid but when I clicked Print from OrcaSlicer, I still get the: Error uploading to pri…

MCU Shutdown Timer too close strange error

General Discussion

nefelim4ag October 23, 2025, 10:51pm 4

As mentioned in the: MCU 'mcu' shutdown error - #7 by koconnor

Probably this: Revive your Prusa Mk3s with Klipper 1/5 – Flash Bootloader – MyRigs

I never had such hardware.

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MCU Shutdown Timer too close strange error

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