Seeking Advice on Implementing Firmware Update for STM32WL5MOC Microcontroller

[User2501]

Hello everyone,

I'm currently working on a project that involves the STM32WL5MOC microcontroller, and I need to implement a firmware update mechanism for it. I have some experience with microcontrollers, but this is my first time handling a firmware update process.

Could anyone provide guidance or share resources on how to implement a firmware update for the STM32WL5MOC? Specifically, I am looking for advice on the following:

1. Bootloader Design: How should I design a bootloader that can manage the firmware update process? Any example code or tutorials would be very helpful.
2. Update Methods: What are the common methods for performing firmware updates on this microcontroller? Should I consider using OTA (Over-The-Air) updates, or is a wired connection (e.g., USB or UART) more reliable?
3. Memory Management: How should I handle memory allocation for the new firmware image while ensuring that the current firmware remains functional during the update process?
4. Error Handling: What are the best practices for error handling and rollback mechanisms in case the firmware update fails?
5. Security: How can I ensure that the firmware update process is secure to prevent unauthorized updates or tampering?

I appreciate any advice, sample code, or references to relevant documentation or tutorials. Thank you in advance for your help!

Best regards,

[STTwo-32 · Accepted solution]

Bonjour @User2501 

For the Firmware upgrade, I suggest you follow the Methode of Firmware upgrade over the Air (FUOTA). For that, the AN5554 and those examples on the STM32CubeWL 13.0 under Project > NUCLEO-WL55JC> Application (they are for the Nucleo-WL55JC, but you can use them as source of inspiration).

Best Regards.

STTwo-32