void zmain(void)
{
    RTC_Start(); // start real time clock

    RTC_TIME_DATE now;

    // set current time
    int hours = 0;
    int minutes = 0;

    printf("Hours: ");
    scanf("%d", &hours);
    now.Hour = hours;

    printf("\nMinutes: ");
    scanf("%d", &minutes);
    now.Min = minutes;

    now.Sec = 0;
    now.DayOfMonth = 0;
    now.Month = 0;
    now.Year = 2020;
    RTC_WriteTime(&now); // write the time to real time clock


    for(;;)
    {
        if(SW1_Read() == 0) {
            // read the current time
            RTC_DisableInt(); /* Disable Interrupt of RTC Component */
            now = *RTC_ReadTime(); /* copy the current time to a local variable */
            RTC_EnableInt(); /* Enable Interrupt of RTC Component */

            // print the current time
            printf("%2d:%02d.%02d\n", now.Hour, now.Min, now.Sec);
            print_mqtt("Zumo018/time:, %2d:%02d.", now.Hour, now.Min);

            // wait until button is released
            while(SW1_Read() == 0) vTaskDelay(50);
        }

        vTaskDelay(50);
    }
}

#endif