Bluetooth Low Energy get characteristic description

Question

I have one bluetooth 4.0 sensor which send me many services and characteristics, like this draft example:

<service uuid="ServiceUUID" advertise="true">
  <description>Test Service</description>
     <characteristic uuid="CharacteristUUID" id="test_rate">
         <properties read="true" notify = "true"/>
            <value length="1" type="hex"></value>
            <description>Test Rate</description>
     </characteristic>
</service>

I start with android sample BluetoothLEGatt and I want get the characteristic description name for example (Test Rate) dynamically, because in sample they use SampleGattAttributes class to get the description programmatically.

Anyone know how it is possible?

Regards.

Answer 1

For BluetoothGatt dynamic data you have to follow below steps to create the call back methods

1. Create object of Bluetooth Device, device Address will be the one which you will get after connection

    BluetoothManager m = (BluetoothManager)context.getSystemService(Context.BLUETOOTH_SERVICE);
           m_adapter = m.getAdapter();
   BluetoothDevice device = m_adapter.getRemoteDevice(deviceAddress);
   

2. Create BluetoothGatt object

       private BluetoothGatt m_gatt;
       m_gatt = m_device.connectGatt(m_context, false, m_callback);
   

   3.Call back implementation

     private final BluetoothGattCallback m_callback = new BluetoothGattCallback()
    {        public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
       String testid = characteristic.getDescriptor(characteristic.getUuid()).getCharacteristic().getStringValue(0);
   };
                   }
   

Make sure for the bluetooth permission and other minor variable declaration.