code: def device_radio_str(self, resp, indent="  "):
          
          signal = resp.signal
          tx = resp.tx
          rx = resp.rx
          s = "Wifi Signal Strength (mW): {}\n".format(signal)
          s += indent + "Wifi TX (bytes): {}\n".format(tx)
          s += indent + "Wifi RX (bytes): {}\n".format(rx)
          return s
docs: Convenience to string method.