#define echopin 2
#define trigpin 3
long duration;
int distance;

void setup()
{
  pinMode(trigpin, OUTPUT);
  pinMode(echopin, INPUT);
  Serial.begin(9600);
  Serial.println("Distance measurement using Arduino uno");
  delay(5000);
}

void loop()
{
  digitalWrite(trigpin, LOW);
  delayMicroseconds(1000); 
  digitalWrite(trigpin, HIGH);
  delayMicroseconds(1000);
  digitalWrite(trigpin, LOW);
  
  duration = pulseIn(echopin, HIGH);
  distance = duration * 0.0344 / 2;
  
  Serial.print("Distance:");
  Serial.print(distance);
  Serial.print(" cm");
  
  delay(1000);
}