With Azure RTOS complementing the extensive STM32Cube ecosystem providing free development tools, software bricks, and software expansion packages, STM32 users can also leverage the rich services of Azure RTOS, which meet the needs of tiny, smart, connected devices.

X-CUBE-AZRTOS-WL (Azure RTOS Software Expansion for STM32Cube) provides a full integration of Microsoft Azure RTOS in the STM32Cube environment for the STM32WL series of microcontrollers. Ready-to-run applicative examples are also provided for the NUCLEO-WL55JC evaluation board, thus reducing the learning curve and ensuring a smooth application development experience with Azure RTOS and STM32WL MCUs.

The scope of this package covers the following Azure RTOS middleware: RTOS (ThreadX), File System (FileX and LevelX) and Networking (NetXDuo).

Azure RTOS is a professional grade, highly reliable and market proven Middleware suite:

• Integrated and full featured RTOS. Learn more ThreadX.
• Industrial grade networking stack: optimized for performance coming with many IoT protocols. Learn more Netx Duo
• Advanced FS/FTL: fully featured to support NAND/NOR Flash memories. Learn more FileX and LevelX
• USB Host and Device stacks coming with multiple classes. Learn more USBX
• Safety pre-certifications (from Microsoft): IEC 61508 SIL4, IEC 62304 Class C and ISO 26262 ASIL D
• Security pre-certifications (from Microsoft): EAL4+ for TLS/DTLS, FIPS 140-2 for SW crypto lib
• STM32 granted production license: here

• FileX building require ThreadX as they are based on RTOS model.

One of the following toolchains:

• IAR Embedded Workbench for ARM (EWARM) toolchain 9.20.1 + ST-LINKV3.
• STM32CubeIDE V1.12.0 + ST-LINKV3
• RealView Microcontroller Development Kit (MDK-ARM) toolchain V5.37 + ST-LINKV3

• NUCLEO-WL55JC (MB1389-HIGHBAND-E01)

The STMicroelectronics GitHub X-CUBE-AZRTOS repository consists of the following repositories:

• Drivers: contains STM32WL CMSIS, HAL and BSP drivers
• Middlewares: contains ThreadX, NetX Duo, FileX, LevelX and USBX stacks including porting on STM32 hardware
• Projects: provides ready-to-run applicative examples for Azure RTOS on the supported boards. Projects are structured as follows:

More comprehensive documentation is available on STM32 MCU Wiki.

Azure RTOS is distributed by Microsoft under GitHub and under Microsoft license. STMicroelectronics include Azure RTOS in selected STM32Cube software packages, whether delivered by Microsoft under GitHub, or by STMicroelectronics through STM32 CubeFW packages on www.st.com or GitHub, proprietary license terms are the same between Microsoft and User:

• Source code is available
• User is granted modification
• User is granted redistribution of source (modified or not) and/or binary, provided he develops on an MCU/MPU that is listed officially by Microsoft
• User is granted production, provided he develops on an MCU that is listed officially by Microsoft: Licensed Hardware
• User is forbidden to reuse provided software to create a competing offer Whenever a new STM32 series includes support for Azure RTOS, it is added by Microsoft in the official list

By using STM32WL Series you inherit the “Distribution and Production Use” rights in Section 2 of the Microsoft Software License Terms for Azure RTOS.

For more details about license information relative to each component in this package, please refer to LICENSE

Details about the content of this release are available in the release note here.

Caution : The issues are strictly limited to submit problems or suggestions related to the software delivered in this repository.

For any other question related to the product, the hardware performance or characteristics, the tools, the environment, you can submit it to the ST Community on the STM32 MCUs related page.