It's not totally useless. At night, when you're asleep, you want the house to cool down and think it's "unoccupied" anyways with a more energy efficient profile.mrl14 wrote: ↑ The occupied room feature of these sensors is pointless at night. You don't move enough while sleeping so it'll just think the room is unoccupied. The only reason to get these is if you need to monitor a temperature in a room (ie. baby's room), but if you set a normally colder room to a certain temp, the rest of the house could get super hot. Basically there are a ton of usability/edge cases with these things that make them hard to understand and use.
Also the motion sensors can be useful for automations (I have them trigger things like night lights) and even notification for alarms if you're savvy enough.