String inString = "";

void setup() {
    Serial.swap(1);// to use alternative Rx/Tx, because I connected the wrong ones on my board
    Serial.begin(9600);    // opens serial port, sets data rate to 9600 bps
}

void loop() {
    //for location10, 11 and 12, which are more than 1 byte
  while (Serial.available()>0) {
   int inChar = Serial.read();
    if (isDigit(inChar)) {
      // convert the incoming byte to a char and add it to the string:
      inString += (char)inChar;
    }
    // if you get a newline, print the string, then the string's value:
    if (inChar == '\n') {
      //Serial.print("Value:");
      int location = inString.toInt();
      //Serial.println(location);
      //Serial.print("String: ");
      //Serial.println(inString);
      // clear the string for new input:
      
      inString = "";//
      
      Serial.print("location: ");
      Serial.println(location);
   }
  }
 }