Using a IR Probe on a BigTreeTech SKR 1.4 Board

Sometimes the best solutions…require out of the box thinking. Today, I was working on my 3D Printer and I was trying to adjust the IR Probe for use with the Z-Min Endstop probe. After running the M199 Comand ( get Endstop Status), I noticed that it would never trigger, even when the red LED status was on. The problem I was having was, “How come my Z-Endstop IR Probe will not trigger?” Directly from the Mini height Sensor board documentation, it mentions:

So…it says something about installing a pullup resistor. As you have to wait a week for shipping and you can’t purchase it from RadioShack as they went bankrupt back in the day, One solution that was posed was to change the pin-out to a port that i would likely never use. In this case i will simply change out the pins to a port in which does not have the 10K resistor installed…

and mainly change the Pins in my pins_BTT_SKR_V1_4.h file to use P1_25 instead of the original port of P1_27 in the documentation. That of course means i have to plug it into a different port…but it beats soldering!

Re-compiled the Firmware….and Presto!

As the Z-Endstop State was Triggered instead of being open, i have to just invert my Z-Endstop Logic State:

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