Ryan and I have been looking again at the tft35 touch screen firmware.
There have been a lot of updates from bigtree tech. I started from a fresh checkout and added logic to allow zero extruders.
If you load the firmware now, you will still see a lot of menu items about 3D printing. But they don’t send any unknown commands.
I hope this ends up in a more stable touch screen mode.
There may still be a few more tweaks in the next week or so. But if you want to check it out:
The precompiled binary and config files: