MB1355C firmware upgrade, FUS_STATE_IMG_NOT_AUTHENTIC

[Baochun]

I doubt if the ST-link has some setting problems?

Model:P-NUCLEO-WB55

           PNWB55$CU3

01:09:41 : Warning: FUS_STATE_IMG_NOT_FOUND, Flash already empty !
01:09:42 : Firmware delete Success
01:09:42 : Download Stack/FUS image at address 0x80EC000 ...
01:09:42 : Memory Programming ...
01:09:42 : Opening and parsing file: stm32wb5x_FUS_fw.bin
01:09:42 : File : stm32wb5x_FUS_fw.bin
01:09:42 : Size : 23.92 KB
01:09:42 : Address : 0x080EC000
01:09:42 : Erasing memory corresponding to segment 0:
01:09:42 : Erasing internal memory sectors [236 241]
01:09:42 : Download in Progress:
01:09:43 : File download complete
01:09:43 : Time elapsed during download operation: 00:00:00.627
01:09:43 : Firmware Upgrade process started ...
01:09:43 : Application is running, Please Hold on...
01:09:55 : Reconnecting...
01:09:55 : Reconnected !
01:09:55 : Error: FUS_STATE_IMG_NOT_AUTHENTIC: Firmware/FUS upgrade requested, image found, but its signature is not valid (wrong signature, wrong signature header)

[STTwo-32]

Hello @Baochun and welcome to the ST Community :smiling_face_with_smiling_eyes:.

In order to update the FUS from v0.5.3 on STM32WB55, you should use this binary stm32wb5x_FUS_fw_for_fus_0_5_3.bin. You can look this wiki page which describes how to update the wireless firmware.

Best Regards

STTwo-32