CODEWITHSUNDEEP
androidbluetoothsystembluetooth-lowenergy
Gurfuffle
Gurfuffle

Reputation: 784

Exact Process of Bluetooth Low Energy

I have been using Bluetooth Low energy to connect to a sensor. I would like to know the exact process by which connection and data transfer rates happen.

Could somebody verify that I have this process correct, or if not, please tell me where I am going wrong.

ATT - The framework for managing BLE connection

GATT - The process where either the server or client can request and accept pull requests, and the process with which data is stored from ATT

GAP - The data transfer back from the server to the client OR is it what establishes and manages connections between devices

Thanks in advance

Upvotes: 0

Views: 1003

Answers (1)

Vegar Westerlund
Vegar Westerlund

Reputation: 1624

Gap (Generic access protocol) is responsible for creating and managing connections. This includes start advertising, start scanning, create connection, updated connection parameters and establishing encrypted connections.

Att (Attribute protocol) is the attribute protocol. It defines the database that you query with the GATT client over a link. Attributes in BLE has a UUID defining the type of data stored, a handle and a value. Att also takes care of linking attributes together (a service attribute has a set of characteristics linked to it. A characteristic has a set of descriptors linked to it...)

Gatt (Generic Attribute profile) runs on top of the Att. A connected device can query the remote GATT server using it's local GATT client to retrieve the ATT attributes.

Hope that clarifies it a bit for you! Read more here for instance

Upvotes: 2

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