uint trig=0;
uint echo=2;

long sonuc=0;
long mesafe=0;

 void setup(){

 pinMode(trig,OUTPUT);
 pinMode(echo,INPUT);   

 }

 void loop(){

digitalWrite(trig,0);
delayMicroseconds(2);
digitalWrite(trig,1);
delayMicroseconds(10);
digitalWrite(trig,0);
sonuc=pulseIn(echo,2);
mesafe=(sonuc/2)*29.1;
Serial.print("Mesafe =");
Serial.println(mesafe);

 }