Hello there!
As I fix up my home, I am looking for a smart smoke detector that is able to alert me if I’m outside my home. But here’s the catch: I also want to be altered when I’m inside my home, on a different floor than the detector. That’s means that the detectors need to communicate together. If one goes off, all of them will alert the household. It seems that every smart detector is inept in this regard.

Are there any detectors that can serial connect and alert me outside of my home?