STM32WB5MMG does not respond to interrupt in low power mode and disabled debugger

[ljw]

I am using the STM32WB5MMG processor with SDK version 1.20.0. The basic operation involves periodically reading sensor data in response to interrupts generated by the sensor, and then transmitting this data via BLE. To reduce power consumption, we are utilizing low-power mode. With this setup, the overall functionality worked well.

However, when we tried to further reduce power consumption by changing CFG_DEBUGGER_SUPPORTED = 0, the device no longer seems to recognize interrupts from the sensor. Of course, reverting CFG_DEBUGGER_SUPPORTED = 1 resolves the issue, and the device operates without problems.

Have there been any reported instances of this kind of behavior? I'd appreciate any information you can provide regarding what to check or if there are any known solutions.

Best regards,

[STTwo-32]

Hello @ljw and welcome to the ST Community.

I think this post is discussing a similar behavior. It should help you.

Best Regards.

STTwo-32

[Honista Apk]

Thanks for sharing this issue and solution. Low-power mode behavior can sometimes be tricky on STM32WB devices, especially when debugger-related configurations affect interrupt handling. Discussions like this are very helpful for developers troubleshooting embedded systems and optimizing performance. I also enjoy reading technical guides and Android app resources on Honista Blog (https://honista.blog/), where detailed tutorials and updates are regularly shared. Looking forward to more insights from the community on this topic.