But was wondering if there’s an HA-friendly option like that device that folks have been using to add monitoring for their “dumb, standalone” smoke and CO detectors? I’ve tried the First Alert Z-wave models and had so much trouble I ended up replacing all of them with regular non-smart devices.
I did see this idea:
But that looks like it requires detectors that have a dc-output of some kind, and I don’t think mine do. I was hoping for some type of “listening” device instead.
If you have Z-wave then definitely go with the Zooz smoke/CO detector. You don’t need dc-output. Just connect load, line and interconnect as per the drawing.