Printer completely disconnects after changing any config and only reconnects if i turn the host off

General Discussion
1

Basic Information:

Printer Model: custom
MCU / Printerboard: creality 4.2.2 gdf303
Host / SBC bigtreetch pi
klippy.log
klippy(10).log (3.4 MB)

Describe your issue:

…

was configuring a custom printer i made using a ender 3 v2 board and after some errors, managed to get it to connect, configured all files, macros, fluidd, printer.cfg, everything, and it was all working fine, did pid tunes, saved configs, etc but when i went to run a z offset calibration it gave the ‘‘move exceeds maximum…’’ on Z, so i went to add the position min line, went to the ‘‘save and restart’’ command, and it does save and restart, but once it restarts, it wont connect again, always giving the ‘‘unable to restart mcu/mcu lost connection’’ it only reconnects if i turn off the btt pi and turn it back on, then everything connects and goes back to normal, until i try to update any config.

extra info:
it’s a custom printer using the frame and board of a ender 3 v2, so i am currently using the basic ender 3 v2 printer.cfg that i had, since it works fine, the printer doesnt have much differences to a v2

i’m running this printer on a brand new btt pi, together with another printers, a s1 pro, wich is working fine and doesn’t have the same issue

2

tried starting a print again, works fine, even adjusted the live z offset, stopped the print, manually typed the save config command and it worked fine, rebooted and connected back on for some reason

3

ok, another test, if i manually click to reboot my klipper instance (the second instance, being used with this printer) it reboots and connects back on

4

Add:

[mcu]
...
restart_method: command

and check if this fixes your issue. If not, post a new klippy.log

5

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