readCharacteristic method
Performs service discovery on the peripheral and returns the discovered services.
This operation can only succeed when the host is connected
with the
peripheral. Only the success or failure of this operation should be propagated
to this stream. The read value is distributed to charValueUpdateStream.
Implementation
Stream<void> readCharacteristic(CharacteristicInstance characteristic) {
throw UnimplementedError('readCharacteristic has not been implemented.');
}