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 8. The Host/Controller Interface
The best way to predict the future is to invent it.
—Alan Kay
8.1. Introduction
As shown in Figure 3–1, the Host Controller Interface (HCI) is the interface between the host and the controller. It is responsible for two main functions: It sends commands to the controller and receives events back, and it sends and receives data from a peer device.
Typically, the host interface is both a physical and logical interface between devices. The logical interface defines a number of packet formats for commands, events, and data. The physical interface then defines how these packets can be transported between the host and controller.
8.2. Physical Interfaces
There are four defined physical interfaces in the Bluetooth ...
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