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 ce

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 :)