I’m moving into a townhouse that already has an older security system installed (GE/ITI “Concord 4” I believe). I found the control panel and four sensors: Three door, and one motion.
Question #1: What do these door sensors do, exactly? The more modern ones I’m familiar with have two pieces, but these old ones only appear to have one piece that sits above the door frame. Do they detect the metal in the door itself somehow, or are they missing the other contact part?
Question #2: From what I’ve read, in order to hook an older system like mine up to SmartThings I’ll need to disconnect each sensor from its “zone” terminal in the control box and instead connect it to a NodeMCU (or similar board). However, it does not appear the sensors are connected to any of the “zone” terminals currently. They are instead twisted around the wires going into the Touchpad terminals. What’s that all about?
Link to the pictures with captions:
If anyone can help me out here, that’d be fantastic!