nRF programming interface ( SWD) easily accessible via test pads and can be unlocked.nRF needs at least ~1.9V battery voltage to boot up.BLE connection interval of 1 second when near its owner’s device.Transmits BLE advertisement every 2 seconds when away from its owner’s device.Samples the accelerometer every 0.5 seconds once motion is detected, for 20 seconds.Samples the accelerometer every 10 seconds when waiting for movement.Makes noise once every 6 hours while in lost mode and movement is detected.Goes into a lost mode exactly 3 days after being away from its owner’s device.Updates last byte of advertisement data every 15 minutes.Updates BLE address and public key once a day at 04:00am.Sleep current consumption of 2.3♚ gives over 10 years of potential battery life.The popular nRF52832 is used for BLE and NFC.Uses off the shelf components, apart from Apple’s U1 chip for UWB.Tweet me or view on GitHub to propose changes or corrections. It will be updated as more is discovered. It is a combination of my work and publicly available information. This page serves as a central resource for technical details of the AirTag: hacks, security research, modifications, teardowns and more.
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