October 2012
Intermediate to advanced
368 pages
10h 14m
English
Content preview from Bluetooth Low Energy: The Developer's HandbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 4. New Usage Models
All of the books in the world contain no more information than is broadcast as video in a single large American city in a single year. Not all bits have equal value.
—Carl Sagan
Bluetooth low energy enables a new way of using wireless technology. The main new models are based around the advertising model and include presence detection, broadcasting of data, and connectionless models. They also include gateways from devices to the Internet.
4.1. Presence Detection
The most interesting new wireless model enabled by Bluetooth low energy is presence. Presence means the state or fact of existing, occurring, or being present in a place or thing. Using the advertising model, devices can passively scan in the background for ...
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