STM32WB55 BLE stack not working

[mnoro.1]

Hi,

I have a problem on my custom STM32WB board. It was working properly, but suddenly now it's BLE functions not working. The M4 core is OK, but APP_BLE_Init function return error and it fall in Error_Handler. When I checked the source of error, I reached to SHCI_C2_BLE_Init that return 0xFE. This error code is unknown.

I checked my board in STM32CubeProg. This picture shows option bytes of that:

Any one can help me?

Thank you.

[ALimb.1]

This comment is probably too late. I'm replying, just in case someone else has this issue in the future.

I had the same issue after upgrading BLE stack. For my case, I had to ensure that wireless stack was running and not the FUS. Please see AN5185 (section 2.3, Wireless stack start) to see how to start wireless stack.