I got a zwave product that you mount next to your normal smoke detector. It listens for the alarm. When it hears it, it sends a zwave notification. Works great!

I got a zwave product that you mount next to your normal smoke detector. It listens for the alarm. When it hears it, it sends a zwave notification. Works great! I also have laser particulate sensors hooked to esp8266s for dramatically higher resolution smoke/air quality detection. They go over Mqtt to home assistant for graphing, automations, etc.