Stepper Calibration Zero point question

[sinful quail]

XPLANE-11 , 28byj stepper , running flap gauge , I have the usual issue of loosing zero point if MF connector is not stopped before shutdown or if a PC crash etc, or if I forget. I read somewhere that MF can support a zero switch or optical sensor to correct the zero point. Can anyone advise or point to how this is done?

[severe aspen]

You connect a switch located at the zero point to an Arduino pin and the other leg to GND. Uncheck the Autozero none box and specify the arduino pin you connected the switch.

The Mobiflight firmware will rotate the motor ccw until the switch is pressed.

Switch can be anything that will send GND to the designated arduino pin when the motor reaches the zero point.

[sinful quail]

Thank you Jaime! Great explanation

[brazen shard]

can you please share your setting page for the gauge thanks

[sinful quail]

Here you go ..there are some other switches in the config that I was testing

screenshots of settings