How to update STM32F401 firmware over LTE/GSM ?

[RNair.3]

Greetings.

For our data collection devices, we use STM32F401 as the microprocessor and Telit modems to communicate with the server. We are planning to have a feature to update the firmware on the STM32F401 over the air, if possible. Currently we use STM Cube IDE or ST Link Utility to update the firmware. Is there any support for this? Does STM32F401 has enough memory to support this or do we need another processor with a file system to achieve this?

[KnarfB]

It shall be possible. You basically partition the flash in 3 areas: boot loader, firmware1, firmware2. One firmware partition is the current/running firmware, the other will be overwritten with the next firmware update. The boot loader decides which one should run. There is some material around like a video series https://youtu.be/OkUQ3iMmiYQ and more, check the web for STM32 OTA (over the air) boot loader.

F4 series is not the latest and greatest concerning IoT features (crypto, security, trust zone,...) and the F401 flash might be a little small, but it is worth looking into it.

hth

KnarfB

[Viniciuspsc]

Hello,

I'm trying to do the same thing, receiving a firmware update for an STM32WB, via a Telit LTE module. Have you had success with this implementation?

Thank you

[Tesla DeLorean]

https://community.st.com/t5/stm32-mcus-wireless/how-to-update-stm32wb-firmware-over-lte-module/td-p/672350

I've updated my STM32 firmwares using Telit cellular modems..

Used HTTP to find if there is an update for current firmware, used that to pull a secondary .HEX with the new update.

[Viniciuspsc]

Did you do this using UART?
And did you need to create your own bootloader? Could you give more details on how you did it?

Thank you.

[Viniciuspsc]

Do you need to control Boot0 Pin to do that?

[Andrew Neil]

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@Viniciuspsc wrote:

Do you need to control Boot0 Pin to do that?

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The AN4657 approach? 

No.