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  if(low_power_mode == 1)  {    standby(10);    HAL_RTCEx_DeactivateWakeUpTimer(&hrtc);      }void standby(int seconds) { /* Clear all related wakeup flags*/  __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WUF2);  rtc_set_wake_up_timer_s(seconds); HAL_PWR_Enter...