Reboot persistence

[mcserved]

Summary:

All applications will start anew, meaning it does not matter what the reason for a reset it, it will just reboot. This can cause issues when devices are stationed that have configurations done at run-time (with downlinks for instance) as any reboot can return to their old configs without it being expected by the user. Related to #208.

Why do we need this?

It helps with some applications where some configurations should be kept after reboots.

What is already there? What do you see now?

Any configs made by the user are not saved at all.

What is missing? What do you want to see?

Some configs that can be saved after a reboot.

How do you propose to implement this?

All RAM is cleared, so these configs should be stored on the flash (on the MCU or the external flash).

Environment:

Bare metal

Acceptance Criteria:

Some form of reboot persistence exist for the devices.

What can you do yourself and what do you need help with?

All

[elsalahy]

@marnixcro have you done any development for this issue, if yes, please share the branch.

[mcserved]

@marnixcro have you done any development for this issue, if yes, please share the branch.

I pushed it to feature/feature-reboot (although there was not a lot of progression on this).