New Symphony Radio Modules For IoT


The new Symphony Link protocol based long-distance radio module for machine-to-machine and IoT systems aim to achieve more than 15km in rural and 2km to5 km in a dense urban environment. The Symphony Link is a novel method developed by Link Labs for wirelessly communicating with devices at very long range and with low power consumption that allow connecting hundreds or thousands of sensors over a wide area or single gateway. The Symphony’s range is 100x that of WiFi.

According to the press release, “The Link Labs LL-RLP-20 radio module features the Renesas RX111 microcontroller (MCU) and the Semtech SX1276 LoRa long distance radio transceiver technology. The low-power RX111 MCU in radio module provides low sleep current, small physical footprint and multiple peripherals. Further, the RX family’s complex instruction set allows for DSP-like flexibility to perform encryption/decryption algorithms to secure the wireless protocol. The RX111 MCU also features the ability to read/write to the DataFlash without stopping the main processor execution.”

Commenting on the collaboration of Renesas with Link Labs for developing strong IoT ecosystem, Vin D’Agostino, Vice President General Purpose Unit, Renesas Electronics America Inc said, “Link Labs’ Symphony Link system and the LL-RLP-20 module take full advantage of the flexibility of our RX111 MCU and offer a balance of range, interference immunity, and energy consumption, that make it ideal for low-power connected sensors and edge nodes in an IoT infrastructure.”


Key features of LL-RLP-20 radio module as listed:

  • Receiver sensitivity: -140dBm
  • Transmit power: 70mW
  • TX Peak Current: 122mA
  • RX Peak Current: 10mA
  • Sleep current: <1μA (regulated/direct), 10μA (unregulated)
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As per the company release, wide range, energy-efficient and cost-effective offering of LL-RLP-20 is ideally suited for integration in products like security monitoring devices, agricultural monitors, parking sensors, home automation and smartmeters.



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