#define  echo 2 
#define trig 3

long duration;
int distance;
void setup() {
  // put your setup code here, to run once:
pinMode(trig, OUTPUT);
pinMode(echo, INPUT);
Serial.begin(115200);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(trig, LOW);
delayMicroseconds(2);

digitalWrite(trig, HIGH);
delayMicroseconds(10);
digitalWrite(trig, LOW);

duration = pulseIn(echo,HIGH);

distance = (duration*0.034)/2;

Serial.println("Distance: ");
Serial.println(distance);

delay(1000);
}