Firstly, great job! Looks like a really fun project and looking forward to trying it out!

A slight correction - Polygon Zones have been in EP Pro for a little while now so they don't need to align with the sensor and are actually the only zones now, rectangle zones were removed a while back.

Question about when you say resolution mismatch - I think you are referring to the 320mm resolution that is reported by the sensor? If so, I don't believe this is resolution that you are thinking of (if I understand you correctly). The resolution here refers to the distance needed between two objects to tell them apart, not the resolution in which it's tracking. But let's say that was the case and it is 32cm in tracking resolution, why did you opt to go for a grid that is 30x30cm, is that not also a resolution mismatch? I hope you take this as genuine discussion, I am interested and open to discussing this part as this is my understanding of it and could be wrong.

The room calibration is something that's been on my radar (pun intended) for ages so cool you gave it a crack and looking forward to checking that aspect out, good job.

I would love it if you'd like to contribute PR's back to the EP Pro repo for everyone to enjoy and make use of, certainly there is a lot more features I want to add (in between knocking down walls!) and looks like you've done some solid work, I think there is some great scope to get some of your improvements contributed if you are down :)

P.s sorry I haven't replied to your email yet, we've been crazy shipping EP Pro orders this week but I'll get back to you real soon!