I’m currently experimenting to see if I can sense if curtains are closed using a window/door sensor, and some magnets above and below it (a few cm away) to hold the curtains closed around the sensor. It seems to work!

I’m currently experimenting to see if I can sense if curtains are closed using a window/door sensor, and some magnets above and below it (a few cm away) to hold the curtains closed around the sensor. It seems to work!