//Coded By: Nitin Rajput

const int tp=8;
const int ep=7;
long dur;
int disCM;

void setup() 
{
  pinMode(tp, OUTPUT);
  pinMode(ep, INPUT);
  Serial.begin(9600);
}

void loop() 
{
  digitalWrite(tp, LOW);
  delayMicroseconds(5);
  digitalWrite(tp, HIGH);
  delayMicroseconds(10);
  digitalWrite(tp, LOW);
  dur=pulseIn(ep,HIGH);
  disCM=dur*0.034/2;
  Serial.print("Distance in CM: ");
  Serial.println(disCM);
}