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Stand-Alone LoRa Wireless Module Includes Low-Power Microcontroller Core

Microchip’s WLR089U0 is a certified radio module which provides a complete system for connecting to a LoRa® low-power wide-area network.

At the heart of this stand-alone module is an ATSAMR34J18, a wireless microcontroller which is based on an Arm® Cortex®-M0+ processor core, and which includes an 863-928MHz LoRa radio.

The module, housed in a compact 17mm x 13.5mm package, includes 256kbytes of Flash memory and 40kbytes of SRAM. The low-power LoRa radio protocol is ideal for use in battery-powered remote sensors, and the WLR089U0 module extends the power-saving capabilities of the technology, offering ultra-low Sleep current of 790nA.

The module features highly configurable peripherals including up to four serial communications blocks configurable as I2C, SPI, UART or LIN interfaces, seven 12-bit ADC channels, and two analog comparators.

It supports the LoRa, FSK, MSK and OOK radio modulation schemes and provides a large link budget, with Transmit power up to 18.6dBm and sensitivity of -136dBm.

The module is compatible with the Atmel Studio integrated development environment, and is backed by a detailed reference design package.


  • FCC, IC and RED certified
  • Operating current:
    • Transmit mode: 41.4mA at 868MHz, 114.6mA at 915MHz
    • Receive mode: 12.6mA
  • u.FL antenna connector
  • Supply-voltage range: 1.8V-3.5V
  • Operating-temperature range: -40°C to 85°C


  • IoT end-points
  • Remote and wireless sensors


Evaluation Kit

The WLR089 Xplained Pro Evaluation Kit features a WLR089U0 LoRa module with an on-board debugger, two extension headers for signal breakout and expansion boards, an on-board power management system with current monitoring, an external whip antenna and u.FL connector, and auxiliary 10-pin Cortex programming header.

Microchip - EV23M25A