There’s a OH tutorial on FIND, too. It’s also coming preconfigured as part of openHABian.
FIND3 (no tutorial yet, sorry) now works with BT dongles, too, in addition to WiFi strength triangulation.
But I, too, haven’t understood what you want to do with the camera and why.
FWIW, there’s cameras to only record/stream on movement detection, and some you can use as movement detectors, too (see Foscam thread, I guess you’ll find it if you search for it).
