Issue storing QR in EEPROM and transmitting over RS485

[b707]

@shai

instead the UUID is garbage

It seems that the if and else branches has swapped here:

@shai

 if (rc == '\n') { 
        // store until we hit '\n'
        uuid[ndx++] = rc;
        if (ndx >= numChars - 1) ndx = numChars - 1;
      } else {
        // terminate and flag
        uuid[ndx] = '\0';
        ndx = 0;
        newData = true;
      }