FOTA update through Ethernet

[Selvarasu_K]

I am working on the STM32N6570-DK and would like to implement FOTA (Firmware Update) through Ethernet.

We are planning to perform the firmware update over a wired Ethernet connection, not through wireless or OTA.

Could you please suggest which protocol is better for firmware image update:

• UDP
• TCP
• HTTP

Kindly let me know the recommended approach for reliable firmware updates over Ethernet.

Also, if there are any example projects or reference code available for implementing firmware update over Ethernet on STM32N6570-DK, please share them. It will be very helpful for our development.

[Andrew Neil]

FOTA = Firmware Update Over The Air - so, if you’re using wired Ethernet, it’s not OTA.

 

 

[Selvarasu_K]

Yes, I understand that FOTA means Firmware Update Over The Air, and since we are using a wired Ethernet connection, it is technically not OTA.

However, I believe you understand what I am trying to achieve. I am looking for guidance or an example implementation for firmware update through Ethernet on the STM32N6570-DK.

If you have any reference code, example projects, or recommended implementation approach for Ethernet-based firmware update, kindly share them. It would be very helpful for our development.

[LCE]

I do this on a H733 with bare metal / lwIP / TCP / http / POST, works like a charm - except that the H733 has only 1 internal flash bank, so no read-while-write, which makes it a little “unresponsive” while updating, which got a little bit better after placing some functions into ITCM RAM.

Anyway, for something important like a firmware update, I would never choose UDP, then you have to implement some packet and error checking on your own.

It’s kinda funny how quick the POST file upload via a browser is, but then the internal erasing and flashing seems so slow.

[Andrew Neil]

There are various protocols specifically designed for “constrained” embedded devices; eg,

https://en.wikipedia.org/wiki/Constrained_Application_Protocol

https://en.wikipedia.org/wiki/OMA_LWM2M