[yesimahuman]

Funny, I was just thinking about building something like this since I bought a z-wave smoke alarm listener and it does not work with my first alert system and it really annoys me. It can't be that hard, right? Even something that just detects extremely loud sounds would be useful despite false positives

[pdubouilh]

I was in a similar situation, and it turns out that setting up new zigbee devices with zigbee2mqtt and a frontend was more work than just detecting the sound pattern with a few lines of Go ! Plus the fire-alarms are compulsory and already installed and managed by my building...

[BrandoElFollito]

After a few years using Z2M I moved to the native ZHA. It detects devices better in my case.

Device detection is a nightmare in Zigbee, I wish they made it more robust, predictable, ...

[amluto]

The First Alert RM4 is an officially supported first-party product and costs $25. It really ought to work reliably.