If you're not a fan of Flock Safety cameras and other unknown sources watching you in public areas, SquachWatch might just have what you need. It is free, open-source firmware that turns an ESP32-2432S028R (AKA the "Cheap Yellow Display") into a standalone detector for surveillance gear and trackers.
MakeUseOf
Turn an ESP32 into a surveillance detector that spots Flock cameras and Meta glasses
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