Bluetooth 5.1’s Presence Detection Could Be the Future of Smarthome
 

Bluetooth 5.1 lets devices track each other down to the centimeter. But Bluetooth 5.1 isn’t just for finding your keys—this precise position tracking will let your smarthome know who you are and where you are in your home.
Your Smarthome Doesn’t Know Where You Are

Smarthomes are great for automating lights, climate control, or your coffee maker on a schedule, but they don’t act according to your general behavior. That’s because smarthomes are all based on schedules and commands and, for the most part, lack presence detection. Your home doesn’t know your precise location; it’s not aware of what room you spent the most time in, and without that, it can’t do things for you. At best it can do things at your command (even if it’s a scheduled command).

If you’re outside your home, the problem only gets worse. When you leave or arrive, any knowledge of your presence relies on geofencing. But geofencing can be inaccurate and trigger too late, too early, or worst of all when you’re aren’t near home at all. That last possibility is why many smart devices restrict their capabilities with geofencing; most smart locks won’t unlock a door based on geofencing for instance.

https://www.howtogeek.com/403611/blu...of-smart-home/