I like your design and engineering on the MPCNC. I ordered your hardware and electronics and printed my own parts. I’m overall quite pleased, so my hat’s off to you. I just cant get the darn SD reader to work so I can free up my laptop. I’m stumped. I’m hoping it’s something simple I can fix.
Since you have 2 screens switch one of them so you can verify where the problem is. Its either in the screen or somewhere else, but if you cam narrow it down a bit we can find the issue quicker. I’ll be in and out all day, building some shelves in my garage so I should be able to help every so often.
Okay so I finally got some time to mess with this and I uploaded the firmware for the discount smart controller from your website and used the other LCD (the little one) and it works and recognizes the SD card. So the large LCD one seems to be the issue.