Aren’t there any European products? I believe they must be somehow certified in order to be accepted as the necessary sensors you are required to install in new homes.
I’m soon-ish moving into a new flat, so I’m already planning it home assistant wise, but I’m also not really far on fire alarms.
They would be nice to use as alarms as well.
Having a look here
https://www.zigbee2mqtt.io/devices/TS0601_smoke.html
and here
https://www.zigbee2mqtt.io/devices/JTYJ-GD-01LM_BW.html
there are quite some differences which values they expose.
So this is bringing me to the next point: How do I get them really connected so that
IF one-sensor-detects-smoke THEN all-sensors-give-alarm
?
What I understood is: Home Assistant could trigger any function is one sensor detects smoke. But what does it trigger then? Are there any smoke detectors where the siren can be triggered from outside?
Seems like those sensors
https://www.zigbee2mqtt.io/devices/SMSZB-120.html
https://www.zigbee2mqtt.io/devices/SA12IZL.html
https://www.zigbee2mqtt.io/devices/R7049.html
https://www.zigbee2mqtt.io/devices/JY-GZ-01AQ.html
can be used both as sensor and as a siren, correct?
I’m using 2 HEIMAN Zigbee Smoke detectors on conbee II which work pretty well
Do the Heiman sensors habe the option to use them as a siren? So detector #1 detects smoke, Home Assistant tells ALL sensors to make alarm?
I never tried this. Also not available in service siren.
On deconz, I see 2 clusters IAS WD to possibly sent a warning , siren or strobe and IAS Zone to define zone where I guess you can group sensors in the same. I don’t see those clusters translated into HA.
I use others methods like Google assistant, lights and smartphone notification
link to product (not taken from that store but same picture): https://www.aliexpress.com/item/4000136474999.html
Alternative to zigbee is to use standard linked detectors with a central relay control for monitoring:
Works well for me.
I notice Shelly have just launched wifi smoke alarms as well…
SA12IZL: It is AC powered, lacking router functionality. Not useful.
SMSZB-120: Seems to be sold as " frient Intelligent Smoke Sensor Zigbee" for 40.- € including the standard CR123 battery
R7049: Discontinued
JY-GZ-01AQ: Sold here https://de.aliexpress.com/item/1005004385184651.html excluding the expensive CR17450 battery
I use the Popp smoke alarm + siren: POPP Smoke Sensor with controllable Siren (701486) - popp.eu
You can use the siren independently from the smoke alarm (I use it also as an alarm system along with motion detectors). You can also turn off the alarm, once the siren is on, so you can silence it. Its Z-Wave, so you need a Z-Wave gateway too.
In my garage, I dont have Z-Wave, so I bought very recently a Shelly Smoke Plus, however it looks like one cannot turn off the alarm/siren once it triggers, however, you can perform other actions as soon as the Shelly Smoke Alarm triggers…
With the Popp alarm, can you turn off the siren through HA?
Yes you can
Yes I am using several different smoke sensors, the JY-GZ-01AQ in the rooms where somebody is likely to sleep, so where I want an alarm even if there is smoke in a different room.
What I like about this sensor is that it exposes a ton of entities, not only the option to start and mute the siren remotely.
However, it is too early to speak of an experience. My next step is to buy a smoke-detector-test-spray and actually test how good the detectors actually detect the smoke. So right now I would not say that I recommend any product or even have solid long-term experiences with it.
Thanks, I will look into that. Please let us know if you have some feedback after your testing 
Can someone already share some experiences? I’m looking to replace my old detectors and add a couple of new ones.
I wouldn’t trust Chinese brands for fire detection, they are also not certified for use in Europe, so if you want to use these you need other certified devices in your home to comply to local laws.
European laws don’t permit switching off a siren through just software, so there needs to be a physical button to turn of the siren. The digital turn off is only allowed for paired smoke detectors to disable the siren of the ones that didn’t detect smoke/fire.
I’ve used these in the past:
They work in Z2M and ZHA.
They are really small, so didn’t really fit on the holes of the original dumb smoke detectors. Never had a fire detection to see how they responded but also never got a false positive. So not sure if the digital siren turn off works when actual fire is detected or just for when you start the siren through Zigbee.
I’ve switched to ones from Bosch as those are normal sized and I’ve switched other devices to Bosch Smart Home as well.
The Bosch work in Z2M and ZHA, the siren will be controllable with Z2M soon. I am using it with the Bosch SHC II currently, as the ‘test’ method and linking is not yet supported on other implementations.
The Bosch BSD-2 have the switchable siren now in Z2M starting with 1.35.2 release.
I’ve recently stopped using the Bosch SHC II, it was just too limited for certain features and not fully implemented within HA components. So went back to a combination of Z2M and ZHA for my Zigbee devices.
Because of not being limited to just Bosch, I’ve recently switched back to the frient Heat detector for our shed, which was not good with the Bosch as it kept triggering when it was moist outside. For the moist/dusty environment you really need a Heat detector, and not (optical) Smoke detector.
Inside the house I’m keeping the Bosch, as the functionality is now the same for smoke detectors.
The new Nedis smoke detectors also work (image atached). To pair, use the pin in the packaging to push the reset buttin in the little hole on the side until the LED starts flashing green. It should show up in the HA Zigbee pairing screen then.
This popped up on DuckDuckGo when searching for what smoke detector to use with Home Assistant. I had to create a forum posting account just to ask: Am I the only one that thinks 30 smoke detectors is outrageous?
For me, the Nest Protect is almost perfect EXCEPT that it can’t trigger a signal on the hardwired signal line, which means it cannot be used with remote monitoring services (and thereby reduce your insurance cost). One other VERY useful feature of the hardwired (not battery) versions of the Nest Protect is that they have a built-in motion sensor for that room which works with Home Assistant. No additional sensors needed or cluttering up the room.
Every time I look for smart detectors, it seems like there isn’t quite a viable alternative. I’m on my second round of Nest Protect detectors in one house (after 10 years they hard stop and no longer work per NFPA’s 10-year recommendation on smoke sensor lifetime). I’m about to buy new detectors for another house and would love to have it remotely monitored.
Even if Nest just came out with an auxiliarry device that connected into an existing hardwired system (like the Zooz Bridge) that synchronized with the Nest’s wireless signal, that would rock. Obviously, you can setup HA automations for this, but that puts a semi-reliable intermediary in that path which for a critical safety device isn’t ideal.
Am I missing something in 2024?
