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stm32wb FUS footer has empty word between magic word and version

YWor.1
Associate III

‎2025-09-01 10:55 AM - edited ‎2025-09-01 10:56 AM

Hi.

I'm working on stm32wb for some time, handling CPU2 updates of BLE stack application.

Lately, version 1.23 was published with new FUS version, so I tried updating it with my application running on user flash. I searched for the magic word but I found something strange, empty word in the middle of the footer:

YWor1_2-1756748422758.png

I compared it to previous version and it appear there also.

As described in AN5185, magic word is placed after FW version, so what am I missing?

Any help is welcome.

Thanks in advance.

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