void AlarmTest(void) {

HAL_RTC_GetTime(&RTCHandle, &RTC_TimeStructure, RTC_FORMAT_BIN);
HAL_RTC_GetDate(&RTCHandle, &RTC_DateStructure, RTC_FORMAT_BIN);

/* Set the alarm to current time + 5s */
RTC_AlarmStructure.Alarm = RTC_ALARM_A;
RTC_AlarmStructure.AlarmTime.TimeFormat = RTC_TimeStructure.TimeFormat;
RTC_AlarmStructure.AlarmTime.Hours = RTC_TimeStructure.Hours;
RTC_AlarmStructure.AlarmTime.Minutes = RTC_TimeStructure.Minutes;
RTC_AlarmStructure.AlarmTime.Seconds = (RTC_TimeStructure.Seconds + 5) % 60;
RTC_AlarmStructure.AlarmDateWeekDay = 31;
RTC_AlarmStructure.AlarmDateWeekDaySel = RTC_ALARMDATEWEEKDAYSEL_DATE;
RTC_AlarmStructure.AlarmMask = RTC_ALARMMASK_DATEWEEKDAY | RTC_ALARMMASK_HOURS | RTC_ALARMMASK_MINUTES;
RTC_AlarmStructure.AlarmSubSecondMask = RTC_ALARMSUBSECONDMASK_NONE;
if (HAL_RTC_SetAlarm_IT(&RTCHandle, &RTC_AlarmStructure, RTC_FORMAT_BIN) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}

/* Disable all used wakeup sources: WKUP pin */
HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN1);

/* Clear all related wakeup flags */
/* Clear PWR wake up Flag */
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);

/* Enable WKUP pin */
HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1);

/* Request to enter STANDBY mode */
HAL_PWR_EnterSTANDBYMode();
}