Firmware rollback / Where to get EU_V3.1.0_BF2-0

[Ohrenmann]

Hi,
I'd like to use some of the patches. According to the documentation:
"currently the latest version supported for all patches is EU_V3.1.0_BF2-0"

Unfortunately my TonieBox already received a newer firmware version ota before I started the experiments.
Is it possible to get the original firmware legally somewhere and perform a firmware downgrade?

If not, how can I learn to create patches for newer firmware on my own?

BR

[SciLor]

Hey there,
you usually have 3 different firmware versions on your box. Please make a full dump and check it with the firmware_info Tool.
Which firmware version do you have?

The latest known version is EU_V3.1.0_BF4, but it is defective, and the box always reverts to EU_V3.1.0_BF2.

To make your own patches you'll have to reverse engineer the firmware with Ghidra for example and then find the right spots to change the firmwares' behavior.

[Ohrenmann]

Many thanks for the answer. I already forgot that I did the backups.
First was EU_V3.1.0_BF4
Second and third were are version EU_V3.1.0_BF2.
Copied the second one from backup to sd:/revvox/boot/ng-ofw1.bin and sd:/revvox/boot/ng-ofw2.bin and edited the config to launch ng-ofw2.bin as default.

In theory that's it.