RTC Alarm B Configuration

mathiyazhagan · ‎2025-09-19

I am using stm32wle5jc ( LoRa Wio E5 mini board) with stm32wl FW stack. I tried lot ways to implement the RTC Alarm B (in BIN, MIXED and BCD mode). But is stops entire LoRa Process. How I fixed that?

STTwo-32 · ‎2025-09-19

Hello @mathiyazhagan and welcome to the ST Community

On the Wireless context, the RTC is reserved for the Sub-GHz part of the application. So, if you want to implement an alarm, you may use the HW timer server utility. More details available on the chapter 9.2 of the AN5406.

Best Regards.

STTwo-32

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STTwo-32 · ‎2025-09-19

Hello @mathiyazhagan and welcome to the ST Community

On the Wireless context, the RTC is reserved for the Sub-GHz part of the application. So, if you want to implement an alarm, you may use the HW timer server utility. More details available on the chapter 9.2 of the AN5406.

Best Regards.

STTwo-32

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

mathiyazhagan · ‎2025-09-19

Yeah! Timer Utilities are working. But I want Alarm B that runs on real time based alarm tracking ( like Alarm A as Timer utilities and Alarm B for real time and date track ). How configure this without disturbing other processes.?