; Arguments in event
: DOMString ''address''
:: Address of the remote client.
: short ''requestId''
:: Request id of the attribute read request.
: BluetoothGattCharacteristic ''characteristic?''
:: The characteristic requested to read. Null if remote client requests to read a local descriptor.
: BluetoothGattDescriptor ''descriptor?''
:: The descriptor requested to read. Null if remote client requests to read a local characteristic.