I have an Arduino sketch that takes a timet and when that timet is equal to the current time it sets the new timet to timet + 2.

For example:

 char* convert(char* x, String y)
 {
     int hour;
     int minute;

     sscanf(x, "%d:%d", &hour, &minute);

     char buf[6];

     if (y == "6")
     {
         if (hour > 17)
         {
             hour = (hour+6)%24;
             snprintf(buf, 10, "%d:%d", hour, minute );
         }
         else
             if (hour < 18)
             {
                 //hour = hour + 6;
                 minute = (minute + 2);
                 snprintf(buf, 10, "%d:%d", hour, minute);
             }
     }

     if (y == "12")
     {
         if (hour > 11)
         {
             hour = (hour+12)%24;
             snprintf(buf, 10, "%d:%d", hour, minute );
         }
         else
             if (hour < 12)
             {
                   hour = hour + 12;
                   snprintf(buf, 10, "%d:%d", hour, minute);
             }
     }

     if (y == "24")
     {
         hour = (hour+24)%24;
         snprintf(buf, 10, "%d:%d", hour, minute );
     }
     return buf;
}

The sketch starts for example at 1:00am. timet is set to 1:02, at system time 1:02 timet is equal to the system time.

My loops looks like this:

if (timet == currenttime)
{
    timet = convert(timet)
}

Whenever I check the value of timet it should equal 1:04, however I get the correct value at the first run after the execution of convert, however every time after that my timet value is blank.

I tried changing the code instead of using the if loop. I only run the convert function when I send for example t through the serial monitor. This works fine and outputs the correct timet after the execution of the convert function, So I figured the problem is in the if loop...

Any ideas?