Ultra-low power multi-modulation wireless STM32WLE5x microcontrollers

Based on an Arm® Cortex®‐M4 core running at 48 MHz, and a sub-GHz radio based-on Semtech SX126x, the STM32WLEx microcontroller is an open platform supporting LoRa®, (G)FSK, (G)MSK and BPSK modulations.

Thanks to a deep integration, the innovative and open architecture is optimized for LPWAN (Low-Power Wide Area Networks), legacy / proprietary protocols, flexible resource use, power management for a lower BOM cost, and a better user experience.

Developed using the same technology as our ultra-low-power STM32L4 microcontrollers, the STM32WL series provides a similar digital and analog peripheral set suitable for basic and complex applications requiring an extended battery life and a long RF range through a sub-GHz transceiver.

Wireless connectivity

STM32WLEx microcontrollers comply with the physical layer requirements of LoRaWAN® specifications released by the LoRa Alliance®.

Available LoRa®, (G)FSK, (G)MSK and BPSK modulations can also be used in legacy and proprietary protocols such as Sigfox™, W-MBUS and mioty® for instance.


The radio is suitable for systems targeting compliance with radio regulations including but not limited to ETSI EN 300 220, FCC CFR 47 Part 15, China regulatory requirements and the Japanese ARIB T-108. Continuous frequency coverage from 150 to 960 MHz enables the support of all major sub-GHz ISM bands around the world.

LoRaWAN® and Sigfox™ stacks are available in STM32CubeWL: have a look at their programming code here.

System peripherals

The STM32WLEx line includes a wide variety of communication features including up to 43 GPIOs, an integrated SMPS for power consumption optimization, multiple low-power modes to maximize battery life. A dual-power output and a wide linear frequency range ensure worldwide compatibility.

Security & ID

In addition to their wireless and ultra-low-power features, STM32WL microcontrollers include embedded security hardware functions such as 128- / 256-bit AES hardware encryption, PCROP read / write protection, and public-key cryptography with an elliptic curve encryption engine.

Development ecosystem

The STM32WL55 Nucleo board and STM32Cube Ecosystem form a consistent set of hardware and software development tools to quickly and easily start developing your application based on the whole STM32WL portfolio.

Package information and options

STM32WLEx microcontrollers provide designers with flexibility in terms of memory size.

Two ECOPACK2® compliant packages, featuring three different memory sizes, are available to address different levels of complexity to ensure a cost-efficient fit for application requirements.

Discover STM32WL latest news on the ST blog