Extract and save the SPR key separately

[RMAZANIELLO]

During the factory reset of the device, we want to erase network data (NVM) to rejoin the network as a new device with new ipv6, (designed successfully) but at the same time, we want to keep SRP configuration (also stored in NVM).

So, would it be possible to provide NVM content specification?
What do the various fields of NVM represent?
We want to extract and save the SRP key separately.

Thanks

Regis MAZANIELLO

[jwhui]

The documentation in include/openthread/platform/settings.h provides details on the information OpenThread stores in non-volatile. Note the keys with prefix OT_SETTINGS_KEY_SRP_*.

[abtink]

You can also check the common/settings.hpp definitions (e.g., SrpEcdsaKey). Every item saved in non-volatile Settings has a corresponding class/struct in this header file which specifies its "value" format.