uint trig=0;
uint echo=2;

 long sonuc=0 ;
 long mesafe=0;
  
  void setup() {
    pinMode(trig, OUTPUT);
    pinMode(echo, INPUT);
    Serial.begin(9600);
}

 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);

}