Strange crashes + Wifly shield + RFID reader

Projects General Guidance
4

Get rid of this:

   //Every 5 minutes
  time = millis() % 300000L;
  if(time >= 0 && time <= 500) {
    software_Reset();
    delay(2000);
  }

Replace this:

char code[10];

with this:

const int CODE_LENGTH=10;
char code[CODE_LENGTH+1]; // +1 provides space for the terminating character

Replace this:

          code[bytesread] = val;         // add the digit           
          bytesread++;                   // ready to read next digit

with this:

          code[bytesread++] = val;         // add the digit           
          code[bytesread] = 0;                // terminate the string

In all the places in your code where you use the magic number 10 as the buffer length, replace it with CODE_LENGTH.