Resolved! STM32L051C8T6, standby mode using RTC to wake up,RTC clock choose the 37k LSI ,wakeup time problem
Use STM32L051C8T6 for low-power design. In standby mode, RTC is used to wake up. The RTC clock is internal 37K clock. After 1Hz frequency division, the program sets 180s to wake up. As a result, it wakes up at 160s. Please ask if there is a problem w...