const int trig=2;
const int echo=4;
long duration;
int distance;

void setup() 
{
Serial.begin(115200);
pinMode(trig , OUTPUT);
pinMode(echo, OUTPUT);
}

void loop()
 {
  digitalWrite(trig,LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  duration = pulseIn(echo,HIGH);
  distance = (duration*0.034/2)+1;
  Serial.println("distance" + String(distance));
}