Nordic Information: Bluetooth Low Power Introduction (III)

ATT: Overview 1. ATT (Attribute Protocol)

• In BLE, it is mandatory and used for all data transmission
• Fast, simple, independent of the connection logic

2. Client-Server architecture

• The server is used to store data (for example, our Nordic NRF51 series of chips can be used for the role of the server)
• The client is responsible for requesting data (e.g. Bluetooth mobile phone terminal)
• The server is responsible for initiating notifications and instructions

3. Support fine-grained security (fine-grained)
ATT Transaction (Transaction)

HandleThe index value of the--att table for the PDU transaction of the ATT

UUID-Universal Unique identification code

Permissions-Read, write, certify, encrypt, etc.

Value--Read and write data through the client

From for notes (Wiz)

Nordic Information: Bluetooth Low Power Introduction (III)