docs: def connection_made(self, transport):
          """Connect to device is successful.
  
          Start configuring RTSP session.
          Schedule time out handle in case device doesn't respond.
          """
          self.transport = transport
          self.transport.write(self.method.message.encode())
          self.time_out_handle = self.loop.call_later(
              TIME_OUT_LIMIT, self.time_out)