868/915 MHz LoRaWAN® module


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  • Description

    EMB-LRWL55 is the first ultra-low-power LoRaWAN® OEM module based on STM’s new system-on-chip, STM32WL55xx. It is based on Arm® Cortex®‐M4 and Cortex®-M0+ dual cores both running at 48 MHz, and a sub-GHz radio based-on Semtech’s SX126x. EMB-LRWL55 is a software open platform, which embeds a fully compliant LoRa® transceiver. The module can work with 868MHz EU ISM band and 915MHz US band both.

    The EMB-LRWL55 boasts a tiny form factor of 12.8 x 13.5 x 2.5 mm with 32 pins LGA pads. The module has both low and high-power RF outputs which are switchable and is optimized for battery-powered devices. EMB-LRWL55 can be configured as an embedded microsystem or simple data modem for low-power applications as well. This second application mode exploits EBI (Embit Binary Interface) commands, that can be sent via UART. Through them, all radio and network feature can be controlled and customized. EMB-LRWL55 module provides a wide range of serial interfaces such as LPUART, USART, SPI, and GPIOs which can be interfaced with external devices.

    EMB-LRWL55 supports full firmware updates & partial firmware update. Thanks to the Cortex-M0+, full management of the firmware security is implemented, enhancing data-security and prevention to illegal accesses. The flex power control in power management reduces the overall application consumption because of 8 different low-power modes such as Low-power run, Sleep, Low-power sleep, stop 0, Stop 1, Stop 2, STANDBY with RAM retention, Standby, and Shutdown modes. Each mode can be configured in many ways, providing several additional sub-modes. The antenna can be connected using the U.FL connector or adopting the Ground-Signal-Ground pads. These features make EMB-LRWL55 the perfect solution for small and battery-powered LoRaWAN® end-devices, with the possibility to interface any kind of sensors.

    The applications of EMB-LRWL55 are endless. Some, of the most popular real-time use cases, are as follows:

    Smart Agriculture

    Smart cities

    Smart Healthcare

    Smart Environment

    Smart Homes and Buildings

    Smart fire evacuation systems

    Smart Industrial Control

    Smart metering, supply chain, and logistics

  • Technical Specifications
    • Transceiver: Semtech SX126x
    • Memory: 256-Kbyte Flash memory, 64-Kbyte SRAM
    • Frequency: 150 MHz to 960 MHz
    • Tx output power: Low power mode – +15 dBm High power mode- +22 dBm
    • Rx Sensitivity: -137 dBm for LoRa® @SF12
    • Interfaces: I2C, LPUART, USATH, SPI, GPIOs
    • Antenna interface: U.FL or GSG configuration
    • Supply voltage: 1.8 V- 3.6V
    • Dimensions: 12.8 x 13.4 x 2.5mm
    • Temperature Range: –40 °C to +105 °C
    • Current Consumption: 15 mA in Tx @10 dBm 87 mA in Tx @20 dBm 5 mA in Rx 31 nA in Shutdown mode


  • Documentation

    Brochure: EMB-LRWL55

  • Ordering Information

    Part Numbers: EMB-LRWL55-UL/ EMB-LRWL55-PC

    For quotes, please contact our sales area at sales@embit.eu

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