Finally an application for all those theoretical seeing-through-walls attacks!

This looks amazing, but unfortunately it's not open source due to understandable reasons:

A note on open source: There's been a lot of interest in having TOMMY as an open source project, which I fully understand. I'm reluctant to open source before reaching sustainability, as I'd love to work on this full time. However, privacy is verifiable - it's 100% local with no data collection (easily confirmed via packet sniffing or network isolation). Happy to help anyone verify this.

From: https://news.ycombinator.com/item?id=45684230

I was looking for the source before I jump on setting it up but maybe I'll have to think about network isolation before that.

Nice! I've got a bunch of ESP devices just sitting around to try it on.

Wtf? I thought this wasn't possible with the silicon in older ESPs. Is this a proprietary piece of software? I'd need access to the ESPhome component to use it in my house. (Edit: Ah I see, they use massive amounts of microcontrollers, so probably something basic like signal strength, not anything fancy like the modern Wifi-Sensing.)