Is there proximity detection besides connected SSIDs and NFC? I guess blue tooth devices could work. I'm not sure the range on them. I like how when I get in my

Is there proximity detection besides connected SSIDs and NFC? I guess blue tooth devices could work. I'm not sure the range on them. I like how when I get in my car, my music automatically starts playing (bluetooth) seems like cheao unique bluetooth devices for determining where exactly you are at could be useful. One for the kitchen, bedroom, etc.