Hardwired Smoke/CO Detectors?

[MarkTr]

Other than Nest / Halo, the two options I’m aware of are:

1. Install new “dumb” hardwired detectors, adding the appropriate relay to listen to the wired interconnect and connecting it via a contact sensor with dry contacts:

Integrating Kidde Smoke / CO Sensors into SmartThings Properly

I’m sure this has been done before but I know I’ve seen lots of discussions on the best way to integrate existing smoke/CO sensors into SmartThings. After lots of research I did what I thought was the best way for my situation and figured I’d write up what I did in case it could help someone else. Cost me less then $100 and about 6 - 8 hours of work, probably less if I didn’t write this up and take pictures. The way I did it also does not interfere with the existing sensor operation which was my main concern. My house was built two years ago and has sensors to meet code. That means smoke in each of the three bedrooms, a combination smoke/CO in the upstairs hallway, a smoke in the first floor hallway near the kitchen, and another smoke in the basement. They are all Kidde brand and int…

2. Buy a LEEO / Ecolink FireFighter listening device which will alert ST if it hears an alarm tone from a dumb detector.

Adding Nest Interface to my Smartthings

as a current Halo owner, if i was looking currently, i’d get this. If you have interconnected smoke/co detectors, you only need this one unit. One downside is you can’t silence them from your phone.

I was hoping to install Halo one day since they seemed to have all the features I wanted, but they went belly-up before I got there and it doesn’t seem like a wise move to get one now that there’s no support…I’m waffling between the two options above now, my house is approaching 10 years old so it’s time to replace all the detectors put in by the builders. I could stick a relay in while I’m touching everything, but I have BRK / First Alert and the relay doesn’t distinguish between smoke / CO signals. It looks like the FireFighter does, so for a few dollars more and a couple hours less of my time it seems like a good option.