First let me apologize if this issue has already been covered. I have searched the threads as best as I could but haven’t seen anything recent on this. If there is something out there, please just point me in the right direction.
Here is my situation. I have 10 smoke detectors in my home with several being both smoke and CO detectors. They are all hardwired and connected so that when one of them goes off, they all sound an alarm. I replaced them all about 3 years ago, before I was into SmartThings, with Kidde detectors that are hard-wired; so I am NOT looking for a solution where I replace them all at once again. What I would like is a solution where I can replace just on detector with one that connects to SmartThings and use the existing connections to the other detectors to trigger SmartThings from the one that is replaced. I will gradually upgrade additional detectors, but this will likely happen over a number of years.
I read through the entire post on the Halo detector and that sounded like the perfect solution, up until the point where they went out of business. I have looked at the wired Nest solution, but it doesn’t appear that it will connect to the other detectors. I am not real fond of the idea of the “listening” devices that you put next to the existing detectors and I don’t want to have to do the solution with the relay and the connected switch as I would like to be able to use SHM and the last I saw, this was not possible.
I already have a Z-Wave + network in the house so this would be my preferred connectivity option, but I would also entertain Zigbee or WiFi, If I could get the other capabilities above.
Does anyone have any thoughts on the best solution?