Here’s a wired one for 10 dollars. It has a switch output but probably isn’t very secure as someone could remove the keypad, join the wires together and send the ‘open’ signal to openHAB.
An RF one that sent a coded signal would probably be more secure - unless someone read the signal and cloned it!
I have 2 (accidentally bought a second when I thought the first was busted… but it was a dead battery instead)
Could this work?
It ain’t “secure”, but then again… neither is my “locked garage door”. It’s a really old garage door opener that works fine and I’m a renter, not the homeowner and the “garage” is more of a car port.
I could have the keypad/rf bridge send a message to OH and then setup my own rules?