Yes, a lot of the pins don't work it seems unless you switch to the Rambo board type. That's a lot easier now that you can just put the URL they give you into the additional boards setting in the preferences and use the normal board manager.by arden - Controllers
Ok, following the comment at the end of this Github issue I managed to get things running clean: https://github.com/MarlinFirmware/Marlin/issues/4994 I haven't tested how low I can go for the delay yet but the display is clean at 800ns. I'm guessing this isn't the same problem for the text display you have but posting just in case it's related.by arden - Controllers
I'm going through the exact same issue but with the full graphic version. I actually wanted to use my MKS OLED display but the pins header for the Einsy doesn't set the DOGLCD define so I'd need to spend some time working out the pin outs. However the RepRap.org page for the Einsy talks about getting it working with the Full Graphic Smart Controller, it mentions setting some delays, details here.by arden - Controllers