/*
 HC-SR04 Ping distance sensor
 VCC to arduino 5v GND to arduino GND
 Echos to Arduino pin 13 and 8, Trig to Arduino pin 12
 */

#define trigPin 12
#define echoPin 13
#define echoPin2 8

void setup() {
  Serial.begin (9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
   pinMode(echoPin2, INPUT);
}

void loop() {
  long duration, distance, distance2;
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(20);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration/2) / 29.1;
  duration = duration + pulseIn(echoPin2, HIGH);//maybe first duration should
  distance2 = (duration/2) / 29.1;//be added to second duration because
  if (distance >= 200 || distance <= 0){ //the sound is traveling all the time
    Serial.println("Out of range");
  }
  else {
    Serial.print(distance); //messy debugging
    Serial.println(" cm");
       Serial.print(distance2);
    Serial.println(" cm");
        Serial.println(" XXX");
  }
  delay(500);
}