August 2017
Intermediate to advanced
278 pages
6h 1m
English
With the advent of Bluetooth Low Energy, a technology which is rapidly maturing, it has already started to find its way into a variety of premises.
iTags are small Bluetooth Low Energy sensors, which can be planted on things or individuals (especially toddlers) to track whether the iTag is nearby or far away:

You can buy an iTag for a few Euros online or at a nearby electronics shop.
The Bluetooth implementation of an iTag usually consists of a Link Loss and Immediate Alert Service.