First time person detect after absence

I’d like an alert when a person appears after no person there for a certain time. For example, if there is no-one in the room for an hour (or 5 minutes so it needs a setting I can adjust), I’d like an alert when someone returns. But not continuous alerts while they are there. Also, if no person for > X minutes, one alert.

Example application: Get an alert when someone comes into the kitchen for the first time that day so I can go and assist.

Um, it would have to successfully detect people first. :wink:

That’s true, maybe the same algorithm should be available for movement. Or is there already a way to set a “timeout” so that I only get one alert per 12 hours (for example)?