Using two ESP32-S3 modules you can get ~6000 packets per second with CSI data. I'm using this as a cheap replacement for specialty high-G gyroscope modules, but it could see use for this type of motion detection as well.
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This is an open-source (GPLv3) project that uses Wi-Fi signal analysis to detect motion using CSI data, and it has already garnered almost 2,000 stars in two weeks.
Key technical details:
- The system does NOT use Machine Learning, it relies purely on Math. — Runs in real-time on a super affordable chip like the ESP32. - It integrates seamlessly with Home Assistant via MQTT.