I have a garage door open closed indicator device.
Very simple when the door is open, a tilt sensor transmitter sends a signal and the red led turns off and the green led turns on.
The LEDs in the receiver are about 2.2 volts.
Is there a way to read the LED on off status?
A photo transistor or opto isolator type device.
The receiver itself is 12 volts DC so I can power the uni. I need a way to read the LEDs and trigger an event or post to mqtt.