Detecting BLE Trackers for the price of a Gas Station Hot Dog

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Presented at ShmooCon 2025 by

Larry Pesce

Bil Swearingen

How many BLE beacons are stashed in your car? I have three that I know about. In this talk, we’ll show you how to turn a cheap-ass ESP32 into a personal spy device for uncovering hidden BLE trackers that you would be proud to hang from your Temu-purchased batman utility belt. The CYA Tracker Tracker project is the perfect entry point to dive into ESP32 development–it’s easier than you might expect! If you’ve ever wanted to get into custom hardware but weren’t sure where to start, this is your moment!