How to burn firmware when Mircopython is in mass production

[yfyungit]

Mirco python has bin and.py script file. When the equipment is produced on a large scale, how to quickly burn these two files at once? Are there any tools that can be used?

The hardware in use is ESP8266 ESP32 RP2040 STM32

[andrewleech]

In this situation at work we always freeze our python application into the compiled firmware as per:

https://docs.micropython.org/en/latest/reference/manifest.html

[yfyungit]

@andrewleech After freezing, update the py file from the network to implement the FOTA function, and there will be multiple code files in flash.

[andrewleech]

Ok, you didn't mention you wanted ota firmware updates.
On stm I use mboot and DFU to send encrypted whole firmware updates ota to remote flash, but that only works on stm
There isn't a single standard way of implementing OTA updates on all platforms

[yfyungit]

scrubs mentioned using the vfsmmerge tool, which I think is a feasible solution.

[scruss]

To manage the multiple code files, there was a similar question last week: Include some python files in esp32 image without rebuilding · micropython · Discussion #16145

vfsmerge was suggested. It may not (yet?) handle all the architectures you need. There are instructions for installing vfsmerge using poetry

[Josverl]

Thanks Stewart,
I was thinking about merge_vfs as well - I have been meaning to include it in mpflash as well to make it simpler to use.
its on PYPI as well

It currently handles LFS filesystems in esp .bin files and any .uf2 files .

For that you can use a process like :

I did some research into FAT32, and it should be possible, but ive not yet implemented it.

stm32 , should/may be possible, but apart from the vfs type (LFS/FAT32) will depend on the tools available for the image file format as there are few cross platform conversion tools.

Depending on the boards it may/will need an update to a a lookup table after a manual lookup of the partition table or some additional code to simplify that.

[yfyungit]

Thank you very much, this seems to be a good solution