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;


}

sketch starts for example at 1:00am timet is set to 1:02, at system time 1:02 timet == system time

my loops looks like this:

if (timet == currenttime){

timet = convert(timet)

}

From this now when ever I check the value of timet it should equal 1:04, however I am getting the correct value at the first run after the execution of convert however everytime 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?