code: def open_streaming_interface(self):
          
  
          super(ReferenceDevice, self).open_streaming_interface()
  
          self.rpc(8, rpcs.SG_GRAPH_INPUT, 8, streams.COMM_TILE_OPEN)
          return []
docs: Called when someone opens a streaming interface to the device.
  
          This method will automatically notify sensor_graph that there is a
          streaming interface opened.
  
          Returns:
              list: A list of IOTileReport objects that should be sent out
                  the streaming interface.