> Wi-Fi sensing as a broader technology could theoretically be used for surveillance if someone controlled devices on both sides of your walls.
Wi-Fi sensing is passive, i.e. only one side of the wall is needed.
Wi-Fi sensing is passive, i.e. only one side of the wall is needed.
There are also techniques that use one controlled device and leverage ambient Wi-Fi signals from uncontrolled sources (like a neighbor's router), but TOMMY explicitly disables all options for using devices outside your own network. It only works with ESP32s you've flashed and added to your system.