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WLRS-591EVB Series

LoRa IoT Module Evaluation Board for 863-928MHz, SX1276


  • Chipset: Semtech SX1276
  • Interface: 1xmicro USB, 1xSMA Female, 1xReset button
  • MCU: STM32L073xZ ARM Coretex-M0+32-bit
  • Frequency:863~928 MHz ISM Band
  • Embedded memories (up to 192k bytes of Flash memory and 20k bytes of RAM)
  • Maximal output power100mW(20dBm)
  • Ultra-high sensitive receiving ability by LoRa spread spectrum modulation technology
Enquire Here Datasheet

Product Overview


This LPWAN WLRS-591EVB integrates WLRS-590 that provides ultra –long range spread spectrum communication and high interference immunity.


The WLRS-590 is designed & manufactured in a smallest form factor -SiP (System in Package). WLRS-590 integrates with Semtech SX1276 and a 32-bit ultra-low power Cortex M0+ MCU (STM32L073x), supporting 863-915MHz ISM-Bands.


This product is designed with multiple easy to use interfaces (I2C/SPI/UART/GPIO), For faster development, SparkLAN provides WLRS-591EVB. The EVB equips with a UART-To-USB bridge IC and can be powered by USB. Besides, a SMA antenna connector is also provided for easy antenna installation. WLRS-590 module provides a commands set interface that can use LoRa and LoRaWAN communication through UART interface.

Suitable Application



EU Region

Environmental Compliance


ROHS Reach



MCU STM32L073xZ  ARM Coretex-M0+32-bit
Chipset Semtech SX1276
Frequency 863~928 MHz ISM Band
Flash Memory/RAM 192k bytes / 20k bytes
Interface 1 x micro USB, 1 x SMA Female, 1xRest Button
Antenna SMA Female Connector
Transmitter Power 20dBm
Receive Sensitivity -137dBm
Temperature -40°C~85°C (Operating)

-50°C~105°C (Storage)

Humidity (No-Condensing) Operating: 10~95% (No-Condensing)

Storage: 5~95% (No-Condensing)

Input Voltage 3.3V
Dimension (mm)
L:48mm x W:25mm