Sean Woods

For the interim, there is a pure-tcl module for tcllib to do roughly this task: http://core.tcl.tk/tcllib/doc/trunk/embedded/www/tcllib/files/modules/cron/cron.html

I am also running across this issue, with similar hardware. I have the same Creality 4.2.2 motherboard. My unit is a Ender 3d Pro, with BLTouch, the second z axis...

@theonethread I have the RET6 cpu 

Here is a video of the crash in progress https://user-images.githubusercontent.com/5579902/176673267-b54b1c49-0a8a-459e-befb-133035f34a89.mp4 And here is the model and the 2 different Gcodes I've generated from 2 different slicers: CE3PRO - Cura with...

Also, if it helps in debugging, here are 4 failed prints. From left to right: CE3PRO CE3PRO (again) PRUSA SIMPLE (The one in the video) 

> You have GD32 (a not fully compatible clone of a STM32 chip, also not supported by Marlin) model F303 also not supported by Marlin. > > Use manufacture provided...

So to summarize my issue: I have a knockoff processor, and my best/only option to make the beast work reliably is to replace the motherboard. Honestly, I really can't complain...

An update: I briefly tried the Creality provided firmware. Either it's completely bonkers, or I'm doing something wrong. The bed leveling system is indicated to be CR Touch, not BL...