Protect NVM from being overwritten during reflash

[Brian]

I'm using the pstorage driver on the nRF51 to maintain several NVM variables. The NVM functions correctly and maintains state between power cycles. However, when I reflash the device using OTA reflash (application only, not SoftDevice), all of my NVM variables are reset to 0xFF. How do I prevent reflashing from modifying my NVM variables?

This is the command line I'm using to generate the zip file used for OTA reflash -

nrfutil dfu genpkg myProgram.zip --application myProgram.hex --application-version 0xffff --dev-revision 0xffff --dev-type 0xffff --sd-req 0xfffe

Thanks

Brian

[FormerMember]

The "Preserving application data" section in the bootloader documentation explains what to do to avoid loosing data during the DFU operation.

[FormerMember]

Do you use single bank or dual bank DFU?