Very cool and fun project! I am a total dummy when it comes to this kind of hardware stuff and always admire people who do it.

A couple of questions:

* How / where did you get the inspiration for this? To me it's one of those things that seems "obvious" once I see it, but I wouldn't have thought of it on my own first.

* What does that thermal imaging camera "see?" Just heat? Could it detect a person vs. robot vacuum vs. house cat? (relevant for kitchen monitoring especially!)

* From the article, it looks like you're using Python? Are there good libraries available for other ecosystems as well?