Migration of settings storage to external flash

[Emanuel Costa]

Hi guys,

I am currently working on a data migration of the settings storage to the external flash.

The problem I am facing is that after an OTA update, the device does not retain the Matter commissioning state. I did a raw copy of the older settings_storage to the new location (NOK), and then started to look into the option to copy by setting name but not sure if it is possible because as far as I know the settings names changed completely from Matter 1.0 to Matter 1.4.0.
For example, previously it was "chip/country-code" and now is "mt/cfg/country-code".

 

My question is, has anyone else tried to do something similar? Should I do a map of older settings names to new settings names and migrate the values that way? (would be a tough job to do and most likely will miss some settings).

Or should I live with the fact that if I do this memory layout change, the device has to be commissioned again?

Previous memory layout:

...
settings_storage:
  address: 0xfc000
  size: 0x4000
  region: flash_primary
...

New memory layout:

...
settings_storage:
  address: 0xef000
  size: 0x8000
  device: W25Q16
  region: external_flash
...

[AHaug]

Hello,

I see that this might be a question open to the forums as well, but I believe that if you're migrating versions where settings names have changed, you will have to rename those settings and thus recommission the device... This sounds quite tedious though, so I will look closer into this if this is the current only solution.

Kind regards,
Andreas