DIY AirTags: Introducing OpenHaystack

OpenHaystack is an open-source framework enabling you to build your own Bluetooth trackers leveraging Apple's Find My network. By reverse-engineering Apple's system, it cleverly uses Bluetooth broadcasts, public-key cryptography, and Apple's central database for location tracking. The project provides a macOS application and firmware, supporting various Bluetooth devices like BBC micro:bit and ESP32. While limitations exist, it offers a creative solution for personal item tracking.