Update FUS to version 2.0.0 and BLE Stack via FOTA

[Novodes]

Hi,

We are using the STM32WB5 series. 
We have implemented a FOTA mechanism to update the BLE Stack and the FUS (both separately).

1. We have noticed a new version of the FUS (2.0.0), which, to our understanding, is not backward compatible with older versions of the BLE Stack. Is our understanding correct?
2. If we just update the FUS to version 2.0.0 without updating the BLE Stack to the matching version, will the BLE stop working? 
3. Is there any way to get the BLE to work anyway after just a FUS update to version 2.0.0 with some minor modifications so that we can continue to the next step with our FOTA update and update then the Newer BLE Stack? 

Thanks,
Eyal

[STTwo-32 · Accepted solution]

Hello @Novodes 

There is no mention that the FUS V2.1.0 is not backward compatible with older Stack version. But it is recommended to use the last stack versions to guarantee that you have the best working version. I've just done a test with the newest FUS and an old stack without BLE issues. So, i think you can keep working on your project.

Best Regards.

STTwo-32