Is this the only device that can be used in this situation? Any zigbee device that can send an on/off state back to HA?
After considering the eye-watering Clipsal Wiser range, and looking at other, sub-par, options in Australia, I’m desperate to get something working. I don’t feel happy leaving my dog at home until I can sort this out.
You can use a zigbess door/window sensor and hack it to put the relay output from one of these in place of the reed switch. Factoring in the effort you might as well buy a Zigbee smoke detector…
The “relay” option for smoke alarms usually outputs 0v when there is no alarm, and 110/220vac when there is an alarm. If you’re not sure, you can check this with a multimeter or voltage tester when you press the alarm’s test button.
You can use many sensors to detect this voltage change — typically anything with “switch inputs” or even dry contacts should work. I’ve used a ecolink zwave door sensor because it has wired contact inputs, but replaced it with a small zwave relay module because it fits inside the ceiling box (the down side is it has no battery). The Shelly i4 has switch inputs so works great as a WiFi option, and I’m sure there are Zigbee relays and sensors with switch inputs that work similarly.
So bit of an update. I went ahead and ordered a stand alone relay for the smoke alarms I’m using (Red R240P). I’ll connect this to one of the smoke alarms (all are connected via SDI interconnect wire) and then connect the Shelly i4 to the fire relay on the Red relay unit.
This should give me exactly what I am wanting.
To answer the question of why I didn’t get a Zigbee smoke alarm - I did. I bought the Clipsal Wiser smoke alarm that uses Zigbee, and a Zigbee coordinator. The 2 do not communicate properly. There also isn’t a shred of evidence on the web to confirm that they do. I’ve returned that and bought a relay and Shelly instead.
I hope this works out will and will update when I have tested.