Bosch smoke alarm II (BSD-2) via Zigbee2MQTT experiences. Faulty alarms?

Hello everyone. I am looking for experience reports from people who use the smoke alarm II (ideally with z2m).

I am particularly interested in false alarms. By chance and unfortunately only after the purchase, I found many reports of faulty alarms in the Bosch forum. Interestingly, often in the middle of the night and I assume in connection with Bosch’s own smart home controller.

Now my hope is that these false alarms are perhaps more likely to occur in the complete Bosch system and may not just be due to the smoke detector itself.

Perhaps someone has these reliably in operation.

I have a bunch of these in operation for the past 2 years or so. Also have a few Twinguards.

In the beginning I used the Bosch hub with the Home Connect integration (I think it was) because it wasn’t yet integrated into Zigbee2MQTT due to the pairing issue.

So far, I’ve had 3 false alarms. All of them in the middle of the night. 2 of them was while using the Bosch hub and one with Zigbee2MQTT. The 3 false alarms came from 2 different devices. The device that had two of the false alarm have also had reported communication issues so I’m considering switching out that one just to be safe.

The only advantage with false alarms is that you can switch them off remotely. A real alarm requires that you pull out the batteries (tried that when I got a “real” alarm due to smoke while cooking)

Many thanks for the feedback. That you also had a false alarm with z2m is not nice. I hope I will be spared this for the most part.

I hope they don’t occur when Home Assistant and z2m as an addon are both shut down and restarted!

Really? Shouldn’t you just press the smoke detector (hardware, i.e. the device) itself? At least that’s what the Operating instructions say.

Never happened to me at least

Oups, maybe I have to read the user manual. Thought I read that the batteries have to be removed but it was a while ago and I probably only skimmed through it. That would be great if that’s true because some of mine are sitting 4 meter up making it annoying to get there.

From the manual:

After checking, initiate emergency measures. If there is no hazard, acknowledge the alarm on the detector which triggered it.

Unfortunately, you also have to touch the device to do this. But a broomstick could help. :sweat_smile: