BluetoothRemoteGATTDescriptor

The BluetoothRemoteGATTDescriptor interface of the Web Bluetooth API provides a GATT Descriptor, which provides further information about a characteristic’s value.

interface BluetoothRemoteGATTDescriptor {
  readonly attribute BluetoothGATTCharacteristic characteristic;
  readonly attribute UUID uuid;
  readonly attribute ArrayBuffer? value;
  Promise<ArrayBuffer> readValue();
  Promise<void> writeValue(BufferSource value);
};

BluetoothRemoteGATTDescriptor.characteristicRead only

Returns the BluetoothRemoteGATTCharacteristic this descriptor belongs to.

BluetoothRemoteGATTDescriptor.uuidRead only

Returns the UUID of the characteristic descriptor, for example '00002902-0000-1000-8000-00805f9b34fb' for theClient Characteristic Configuration descriptor.

BluetoothRemoteGATTDescriptor.valueRead only

Returns the currently cached descriptor value. This value gets updated when the value of the descriptor is read.

BluetoothRemoteGATTDescriptor.readValue()

Returns a Promise that resolves to an ArrayBuffer holding a duplicate  of the value property if it is available and supported. Otherwise it throws an error.

BluetoothRemoteGATTDescriptor.writeValue()

Sets the value property to the bytes contained in an ArrayBuffer and returns a Promise.