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Descriptor Descriptors are defined attributes that describe a characteristic value.A characteristic can be thought of as a type, Characteristic A characteristic contains a single value and 0-n descriptors that describe theĬharacteristic's value.The attributes transported by ATTĪre formatted as characteristics and services. ID used to uniquely identify information.

Unique Identifier (UUID), which is a standardized 128-bit format for a string Each attribute is uniquely identified by a Universally To this end, it uses asįew bytes as possible. Attribute Protocol (ATT) GATT is built on top of the Attribute Protocol (ATT).For example, a device could contain a heart rate monitor and a Note that a device can implement more than one A profile is a specification for how a device works in a Profiles The Bluetooth SIG defines manyįor BLE devices.

All current BLEĪpplication profiles are based on GATT. Pieces of data known as "attributes" over a BLE link.

Generic Attribute Profile (GATT) The GATT profile is a general specification for sending and receiving short.

The following is a summary of key BLE terms and concepts: Needs to access the BluetoothAdapter and determine if Bluetooth is availableĪvailable, the device will scan for nearby BLEįound, the capabilities of the BLE device are discovered by connecting to theĬonnection is made, data can be transferred with the connected Once your app has permission to use Bluetooth, your app Use of the Bluetooth LE APIs requires you to Using BLE, the data that's communicated between the two devices isĪccessible to all apps on the user's device.įor this reason, if your app captures sensitive data, you should implementĪpp-layer security to protect the privacy of that data.įor BLE-enabled devices to transmit data between each other, they must firstįorm a channel of communication. Caution: When a user pairs their device with another device