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Associate II
August 25, 2025
Solved

Cannot run any example on Nucleo-WB55RG board

  • August 25, 2025
  • 1 reply
  • 682 views

Hello @STTwo-32,

I was having the same issue and pressing the "start wireless stack" button did the trick for me. 

I was assuming after flashing the FUS & BLE Stack firmware, is that the CPU2 would be up and running already. So, does this mean that we need to manually start the CPU2 by pressing the button? 

Thanks!

This post is created based on a comment for this post.

Best answer by STTwo-32

Hello @Jopail12 

After the installation of a wireless stack, by default it starts running just after installation without the need for any user action. But if the user application sends two consecutive FUS_GET_STATE commands, the wireless stack boots again on FUS. From a user perspective, the wireless stack is installed but not running (FUS is running).

In that case, it is possible to launch the wireless stack execution by sending the FUS_START_WS command. This command switches from the Arm® Cortex®-MO+ execution to the wireless stack, and results in at least one system reset. 

Best Regards.

STTwo-32

1 reply

STTwo-32
STTwo-32Best answer
Technical Moderator
August 25, 2025

Hello @Jopail12 

After the installation of a wireless stack, by default it starts running just after installation without the need for any user action. But if the user application sends two consecutive FUS_GET_STATE commands, the wireless stack boots again on FUS. From a user perspective, the wireless stack is installed but not running (FUS is running).

In that case, it is possible to launch the wireless stack execution by sending the FUS_START_WS command. This command switches from the Arm® Cortex®-MO+ execution to the wireless stack, and results in at least one system reset. 

Best Regards.

STTwo-32

Jopail12Author
Associate II
August 26, 2025

Hello @STTwo-32,

Thanks for the clear explanation!

Appreciate it! 

Regards,
Jopail