In the UK, that makes it cheaper than the Philips Hue PIR-based motion sensor, which is crazy. And while non-Zigbee, you could easily integrate it into an existing Hue setup.

It enables you to add more intelligence to your home automation because not only can it detect motion, if you offload the processing, it can enable object recognition.

So your cat doesn't trigger it. Or triggers a different action.

Because you can control the IR leds and filtering, you can mount it in a dome for ultra-cheap external pan and tilt with an external IR illuminator.

at weenect we're working on gps tracker for dogs and cat, we have a g-sensor that put the system in sleep when the tracker stop moving and wake it up after a certain threshold. but we need to find some good "threshold" that typically won't wake it up when the dog or the cat sleep and move a little, we have some good values but we still some moves on our tests animals (i.e the co-founders dogs and cat) during the night.

We would like to know if it's due do an actual "the cat wake up to go eat/play/whatever" or it's just "the cat is scratching itself"

so with that camera we could image the camera always recording a stream (or by chunk) and when a move over the threshold is detected, it call something on the camera it copy somewhere else the last N minutes so we can analyze it without staying up all nigh :)

Anything involving automated camering.