Hi guys! So in my efforts to make a long range drive way / pool alarm, I think I finally found a good solution. I’m using a 1/2 beam system which transmits to a receiver inside my house. The system by HTZSAFE (although it’s just a cheap Chinese unit that I’ve seen rebranded) has relays out into that can go into an alarm panel. If I’m regeading their instructions right (and a little help from their support) their relays can be normally open and normally closed. Also, if im not mistaken, these outputs actually present voltage of up to 24v. (In fact their picture send to me is showing a resistor on the hot side of the circuit.)
So, my goal is to now integrate that with my Smartthings shield and theres where im.having the problem of not 100% understanding how that works. I’ve got my normal sensors in there, which I thought was just a basic loop. My assumption is that the system puts a small current through one side and returns back to common ground. (Probably something less than 5v but that’s my question) when theres a break in the circuit, the system no longer reads voltage and changes from closed to open.
So thars where I’m stuck, I’m missing how to wire this up to get it to detect when the system triggers the board to send a state change.
Any advice or help?