Comment by saltminer

> lights turning on automatically when you enter a room

Was this really it? Or did they have some use-case not currently covered by motion sensors?

I can see some potential use for security (cheap REX sensors can be easily tricked, allowing unauthorized access into secure areas). The fix is obvious (stop cheaping out on your REX sensors) but I can envision someone trying to bill wifi sensing as the hip new solution for REX systems.