This is a clever approach to motion detection! Using Wi-Fi spectrum analysis is much more elegant than traditional PIR sensors or cameras for privacy-conscious setups.

The ESP32 is perfect for this - cheap, low power, and has the right hardware. I'm curious about the accuracy compared to traditional sensors. How well does it handle multiple people moving simultaneously? And what's the typical detection latency?

The Home Assistant integration is a nice touch. This could be really useful for automation triggers without needing line-of-sight or dealing with camera privacy concerns.