These are my new favorite contact sensors. I have been using them since last December without issue on my C-8. I even have one on the door to my camper parked beside the house (alerts me through homekit if the door is opened) and it has been perfect. When we go on trips and come back, it connects back like nothing happened. Also, while I'm sure it won't last 5 years on one battery, it seems to go for at least a year on a 2032, feels solid, and is cheap.
Download the Hubitat app
