STM32WBA55 How to wake-up with USART2 event in stop mode

ledi7 · ‎2025-02-13

Hi,

i am using STM32WBA55 with BLE_p2pServer_ota example and want to wake-up over an USART2 event (start bit or rising edge) from stop mode. What is a good way to do this? I am using HSI16 with USART2 GPDMA1.

STTwo-32 · ‎2025-02-13

Hello @ledi7

You can use some of the USART2 interrupts to wake up the STM32WBA55 from STOP mode. To do that, you need to configure one of the interrupts that wake up from this low power mode. More details are available on the RM0493 parts 39.6 and 39.7.

Best regards.

STTwo-32

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