The Apache 2.0-licensed, cross-platform, and versioned profile contained several frame types, including Eddystone-UID, Eddystone-URL, and Eddystone-TLM.
[2] The format was named after the Eddystone Lighthouse in the UK, motivated by the simplicity of a lighthouse-signal and its one-directional nature.
Eddystone also contains a telemetry frame (Eddystone-TLM) designed for reporting on a beacon's health, including, for example, battery level.
[13] In 2018, the security of the platform came under scrutiny from privacy advocates with concerns over how the audio component of the beacon is recorded, stored and ultimately filtered to just the ultrasonic portion of the signal.
[14] Without proper informed consent, users may find their conversations are illegally being recorded by beacons using the Eddystone protocol in collaboration with the Nearby Messages API.