This component passively monitors the R10RF 433Mhz RF network and exposes alarm events to Home Assistant as standard entities, thus allowing you to send yourself notifications or trigger events if your house is on fire.
The github features the details of reverse engineering the 433Mhz protocol.
If you have a red smoke alarm system (or any RF subGhz smoke alarm) it would be great to get more codes and devices included in the software!