Academic framework for tracking personal BLE devices via Apple's Find My network (~13k stars, AGPL-3.0). It ships ESP32 (and nRF51822) firmware that advertises as a Find My beacon, so an ESP32 can act as a DIY 'AirTag', the AirTag/Find-My beacon spoof/emulation path on cheap hardware. Authorised research only; covertly placing a Find My beacon to track a person is unlawful.
Lifecycle not assessed: nobody has checked yet whether this tool is still maintained, sold or working. Check the project's own page before relying on it.