bdring

Have you tried measuring with with no servo attached? Can you try it with a different pin. You could have a damaged or overloaded pin.

Have you tried homing to clear the limit switch? Note: switch bounce could trigger a limit. The values of the r/c filter are not shown on the [schematic](https://github.com/makerbase-mks/MKS-TinyBee/blob/main/hardware/MKS%20TinyBee%20V1.0_003/MKS%20TinyBee%20V1.0_003%20SCH.pdf).

Without knowing any details, It seems like the resistance is rather high. You need to consider the values the LED wants. This is the controller side of the circuit. 

Thanks for uploading the info. There are no motors defined in your config. Try this one. I would like to create the perfect Zen Sand config file. If this works...

Actually, the file you uploaded was the Test Drive (no I/O).

1. I think the optical end stops need a 3.3v voltage source when used with the ESP32. There is no easy way to access that. 2. Homing on startup is...

You must use 3.3V, because that is all the ESP32 can handle unless you level shift one your own. The V1 ZenXY page appears to show normal switches as an...

We have these issues in our [tracking system](https://github.com/bdring/FluidNC/projects/1). At this time, most of our time is spent on new user support, so we are primarily working on issues and features...

The current electronics shortage makes a lot of parts hard to get. I have used plug in power supplies in the past.

Files for V2 have been added.