Hi Mark Yu,
I recently bought a BD Sensor, I connected everything correctly changed the pins and so far I do get a reading an calibration works to, unfortunately if I try to bed level or home axis it is crashing in my print bed. I already spend several days but I just can´t figure it out. Z endstop switch doesn't work any more but I guess this is intended if using the BD sensor as probe, because Z_MIN_ENDSTOP_INVERTING is set to false because Z_MIN_PROBE_ENDSTOP_INVERTING false needs to be set as false.
I read the Facebook posting from Jeremy Humphrey he also used a BTT SKR mini V3 and had a similar problem. But i could not figure out if he solved the problem the only thing he motioned was a "Range problem" I can´t understand what he meant by it.
I hope somebody can help me .