What is a pivot firmware?

ANSWER

For Ewon Flexy and Cosy 131, and since firmware version 11.0, it is no longer required to perform an Ewon recovery to upgrade the firmware to another major version.
This major version update can be performed with a simple Ewon firmware update thanks to “Pivot firmware”. This means that the firmware can also be updated from remote.

By "pivot firmware", we define firmware versions that are mandatory to upgrade to before going any higher. In fact, all major versions (v12.0s0, v13.0s0, ...) are pivot firmware.

For example: if the firmware version is currently 11.2s2 and there's a wish to upgrade to v13, a first upgrade to v12 is required. Once the current firmware version is 12, then only can the upgrade to v13 be operated.

However, a firmware recovery is still possible and allows you to jump directly to the latest firmware version. Therefore you do not need to step through all different pivot firmware.
If you have a local access to the Ewon, then it is easier to perform directly an Ewon recovery