STMicroelectronics has enhanced its STM32 LoRaWAN software expansion package for developers (I-CUBE-LRWAN) to support the latest Firmware Update Over The Air (FUOTA) specifications.
STMicroelectronics has enhanced its STM32 LoRaWAN® software expansion package for developers (I-CUBE-LRWAN) to support the latest Firmware Update Over The Air (FUOTA) specifications.
FUOTA cost-effectively future-proofs LoRa devices by simplifying applying application-layer updates and RF-stack updates to devices in the field, increasing the value of LoRa as a long-range, low-power technology for connecting IoT devices. The LoRa Alliance has published three FUOTA LoRaWAN application specifications (v1) that together support and standardize FUOTA: Application Layer Clock Synchronization, Remote Multicast Setup, and Fragmented Data Block Transport. They are respectively involved in time synchronization, sending messages to groups of end devices, and data-file splitting.
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 solution (X-CUBE-SBSFU) with open source crypto library. Indeed, this allows the update of the STM32L4 built-in program with new firmware versions, adding new features and correcting potential issues. The update process is performed in a secure way to prevent unauthorized 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 to ease evaluation and kick-start 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 www.st.com/i-cube-lrwan. It has been made interoperable with various Network Servers, including those from Actility and Senet.
Other network servers interoperable with the LoRaWAN protocol will be considered for integration as well. STMicroelectronics is also actively working on improving the performance of this FUOTA technology for future deliveries.