Software supports LoRaWAN updates for STM32Cube

The STM32 LoRaWAN software expansion package for developers (I-Cube-LRWAN) now supports the latest firmware update over the air (FUOTA) specifications, STMicroelectronics has announced.

FUOTA cost-effectively future-proofs LoRa devices by simplifying application-layer updates and RF-stack updates to devices in the field, explains ST.

By supporting the full firmware update as described in the current set of LoRa Alliance specifications, I-Cube-LRWAN now enables STM32 developers to create LoRa endpoint devices that support FUOTA for STM32L4 microcontrollers taking benefits from the secure boot and secure firmware update (X-Cube-SBSFU) with open source crypto library. This adds new features to the STM32L4 built-in program and corrects potential issues, says ST. The update process is performed securely, to prevent unauthorised updates and access to confidential on-device data. The pack includes the LoRaWAN stack with hardware abstraction layers and sample application code for STM32L0, STM32L1, and STM32L4 microcontrollers for evaluation and development. A test application for LoRaWAN certification tests is also included.

ST’s I-Cube-LRWAN software can be used with LPWAN development boards and sensor expansion boards of the STM32 Nucleo ecosystem, such as the LoRa nodes included in the P-Nucleo-LRWAN2 and P-Nucleo-LRWAN3 developer packs.

The latest I-Cube-LRWAN expansion package with FUOTA support for STM32L4 can be downloaded immediately, free of charge, from

The LoRa Alliance has published three FUOTA LoRaWAN application specifications that together support and standardise FUOTA. These are Application Layer Clock Synchronisation, Remote Multi-cast Set-up and Fragmented Data Block Transport, for time synchronisation, sending messages to groups of end devices and data-file splitting, respectively.

Other network servers interoperable with the LoRaWAN protocol will be considered for integration at a later date.

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