蓝牙 BLE GATT 剖析（一）
一.概述
The Generic Attribute Profile (GATT) defines a service framework using theAttribute Protocol. This framework defines proceduresand formats of services
and their characteristics. The proceduresdefined include discovering, reading,
writing, notifying and indicating characteristics, as well asconfiguring the
broadcast of characteristics.
二.架构
三.ATT属性table
四.GATT profile层次
1.SERVICE DEFINITION
2.INCLUDE DEFINITION
3.CHARACTERISTIC DEFINITION
1）Characteristic Declaration
Characteristic Declaration
2）Characteristic Value Declaration
3）Characteristic Descriptor Declarations
①Characteristic Extended Properties
②Characteristic User Description
③Client Characteristic Configuration
④Server Characteristic Configuration
⑤Characteristic Presentation Format
⑥Characteristic Aggregate Format
4.SUMMARY OF GATTPROFILE ATTRIBUTE TYPES
五.GATT FEATURE REQUIREMENTS
There are 11 features defined in the GATT Profile:1. Server Configuration
2. Primary Service Discovery
3. Relationship Discovery
4. Characteristic Discovery
5. Characteristic Descriptor Discovery
6. Reading a Characteristic Value
7. Writing a Characteristic Value
8. Notification of a Characteristic Value
9. Indication of a Characteristic Value
10.Reading a Characteristic Descriptor
11.Writing a Characteristic Descriptor
具体GATT feature交互参照core4.2
GATT PROCEDURE MAPPING TO ATT PROTOCOL OPCODES
