I am wanting to put downward facing motion sensors on both sides of every door to track people. For instance, if the outside sensor sees motion, followed by the inside sensor, then someone walked into the room, and I can set the room to “occupied”. I plan to have sensors with a view of the entire room as a backup. So, if a room turns to “unoccupied”, the lights go off (and if the lights in an “unoccupied” room are turned on manually, it would be set to “occupied”). If a room is “occupied”, the lights would turn off after maybe a half hour of no activity.
The advantage to doing it like this is it should allow tracking people, and turn on lights to the next room, and immediately turn them off when they’ve passed, or if they turn into a different room (or turn around).
I have experimented with some cheap Xiaomi sensors, and it seems to work in premise, except the sensors will only send a motion update about every 10 seconds. So, if anyone enters then immediately exits a room, the system couldn’t track that, which defeats the purpose. If I can’t trust the sensors over the doors, it would require an unworkable amount of code to track “occupied” versus “unoccupied”. If they sent an update more often, it would drain the batteries, but in this application, it wouldn’t matter - their “vision” would be limited to basically straight down.
TL;DR: Does anyone happen to know of any motion sensors that could be set or modded to send signals constantly? Prefer battery powered sensors, but will considered wired, if my only option. Alterantively, motion strips could achieve the same thing, if anyone knows if those are a thing. TIA!