Eddystone
Specification for Eddystone, an open beacon format from Google
...The standard includes unique identifier frames for asset tracking, telemetry frames for device health and battery, and a URL frame that points scanners directly to web content. A rotating, ephemeral identifier variant supports privacy-preserving deployments where beacons regularly change their broadcast identity. Reference code and documentation show how to craft frames, configure advertising intervals, and interpret signals on the receiver side. Eddystone helped catalyze “physical web” style experiences by making proximity signals easy to deploy and consume across ecosystems.