How to use NPN endstop as XYZ limit?

[pirateboston]

$5 can not do that.

I really need help

[MitchBradley]

We do not support or develop Grbl_Esp32 any more. We only support its successor FluidNC.

[dnmnsmith]

I have NPN proximity sensors. I had evil EMI issues. I ended up with everything opto-isolated and sensors & opto isolators running at 24V.

Upshot is the same though: NPN emitter tied to GND. Collector tied to your pin with pull up resistor, internal or external. When sensor fires, it pulls the pin to GND. Bread and butter stuff.

[bdring]

Try using FluidNC. It is the current name and version of Grbl_ESP32.