Matt Keveney

Perhaps what he means is a pinout that's compatible with the AUX1 connector on MKS-SBASE? See the board layout here, in case it helps. https://www.aliexpress.com/store/product/3Dpriter-control-board-MKS-SBase-V1-0-32-s-Motherboard-compatible-Smoothieware-open-source-firmware-support/1047297_32384368763.html

> Hi, it may be due to the enlargement of the bootloader in idf 3.3.1 I'm using 3.3.1 in both cases. The code is the same. The difference is sdkconfig;...

I've gone into this a bit deeper. I no longer suspect the sdkconfig file difference. They're arranged differently, but funcitonally they seem to be identical, except for the documented differences...

The main .bin file _is_ slightly different, but by less than 1K. I'm not sure why. I did notice that some of the error messages incorporate the source path, which...