Question

In BLE communication, which component of the GATT architecture defines the specific data structure and permissions for a sensor reading?

Accepted Answer

In the Bluetooth Low Energy GATT architecture, the component that defines the specific data structure and permissions for a sensor reading is the GATT Characteristic. A GATT Characteristic is a data point containing a single value and any number of descriptors that describe the value. The characteristic holds the actual data, such as a temperature or heart rate value, and defines its structure using a unique identifier called a UUID. Permissions are attached to the characteristic to determine how a connected device can interact with that data, specifically specifying if a device can read the value to get the current sensor reading, write to the value to change settings, or subscribe to notifications to receive automatic updates when the sensor reading changes. These characteristics are logically grouped together inside a GATT Service, which acts as a container for related functionality.

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In BLE communication, which component of the GATT architecture defines the specific data structure and permissions for a sensor reading?

In the Bluetooth Low Energy GATT architecture, the component that defines the specific data structure and permissions for a sensor reading is the GATT Characteristic. A GATT Characteristic is a data point containing a single value and any number of descriptors that des....