This weekend, I started setting up my first HA instance. My first and main goal is to monitor the fridge and deep freeze sitting in my garage. Kids of cost me two expensive clean outs already. I setup an aqara door sensor, which are magnetic switches. While they do work, getting placement exact is not great. I am having an issue finding a position to get reliable readings, and not being able to leave the door just lightly cracked.
My thought is like a pin switch or similar. Hopefully, not having to create one from an esp32, though not out of the question. Does this exist in a purchasable form, or am I stuck to wiring and 3d-printing?
Check out Aqara water leak detectors. They have two external contacts that when they are bridged change the sensor state to ON. You can run wires to those contacts.
Interesting idea.