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You are here: Home » What is GATT (Generic Attribute Profile) of Bluetooth LE?

By Abhishek Ghosh February 2, 2020 11:34 am Updated on February 2, 2020

What is GATT (Generic Attribute Profile) of Bluetooth LE?

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Our goal is to make our developer readers aware of GATT. Previously, we have discussed about Bluetooth, iBeacon and some theories on Internet of Things (IoT) such as Communication Standards for Wearable Computing, Influence of the Internet of Things (IoT) on Retail which eventually talked around the topic Bluetooth LE.

“GATT Services are collections of characteristics and relationships to other services that encapsulate the behaviour of a part of a device.” (by bluetooth.com). The GATT protocol provides some commands for using in the client-server model.

GATT is the way to define how two Bluetooth Low Energy devices will transfer data using Services and Characteristics. GATT uses Attribute Protocol (ATT) to store Services, Characteristics as 16-bit IDs. GATT works when a dedicated connection has been established between two devices. Only one BLE peripheral only be connected to one central device at a time making the connections exclusive and avoiding confusion. GATT offers notifications and indications. So a client may request a notification from the server avoiding the need to poll the server which would need to be constantly operational.

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Characteristics are the main thing to understand when are interacting our BLE peripherals. They can be used to send data to the BLE peripheral. We can implement a UART-type interface for the TX and the RX channels.

What is GATT Generic Attribute Profile of Bluetooth LE

We do not need to learn a huge theory of GATT for working with ESP32, yet we must make our basics clear. Extensive information on GATT can be read from the official website for the developers :

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https://www.bluetooth.com/specifications/gatt/services/
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Those who will use ESP32 avoiding Arduino IDE, they will find the documentation useful :

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https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/bluetooth/esp_gatts.html
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To work with ESP32 Arduino, you can use the Android App named “nRF Connect for Mobile”. It is the standard app used for BLE development. Neil Kolban extensively worked behind ESP32 Arduino BLE libraries. I am not going more deeper into ESP32 topic but our actual intention of writing this article is ESP32 development.

Tagged With what is the gatt , gatt profile , hwhat is the gatt pro , what is ble gat profile , what is GATT on my computer

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Abhishek Ghosh

About Abhishek Ghosh

Abhishek Ghosh is a Businessman, Orthopaedic Surgeon, Author and Blogger. You can keep touch with him on Twitter - @AbhishekCTRL.

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About This Article

Cite this article as: Abhishek Ghosh, "What is GATT (Generic Attribute Profile) of Bluetooth LE?," in The Customize Windows, February 2, 2020, January 17, 2021, https://thecustomizewindows.com/2020/02/what-is-gatt-generic-attribute-profile-of-bluetooth-le/.

Source:The Customize Windows, JiMA.in

 

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