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I know this is a year old, but I too am having a heck of a time with the bltouch and this board. I had to reverse the wiring of the plug JUST to get it to to the clicky clicky when booted. But any of the leveling commands pup up errors that it's UNKNOWN COMMAND. Very frustrating. Hope you got it to work. Playing with this, I had each and every issue that has been mentioned here.