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|1 year ago
Device detection is a nightmare in Zigbee, I wish they made it more robust, predictable, ...