//ULTRA2

#include <NewPing.h>

#define TRIGGER_PIN 9 // Arduino pin trigger     
#define ECHO_PIN 8    // Arduino pin echo
#define MAX_DISTANCE 600 
     
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); // Configura pines
 
void setup() 
        {
           Serial.begin(9600); // Open serial monitor a 9600 baud     
        }
 
void loop()
       {
           delay(50); 
       
           unsigned int uS = sonar.ping(); //Enviar ping, obtener tiempo de ping
                                           // en microseconds (uS)
           Serial.print("Ping: ");
           Serial.print(uS / US_ROUNDTRIP_CM); 
           Serial.println("cm");
       }