/*
author  : Rajeev TR
date    : 04/09/2024
https://github.com/HoNtErBoT
*/


#define trigPin 23
#define echoPin 22



void setup()
{
  Serial.begin (9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
 
}

void loop() 
{
  long duration, distance;
  digitalWrite(trigPin, LOW);     // Added this line
  delayMicroseconds(2);           // Added this line
  digitalWrite(trigPin, HIGH);
                                  //  delayMicroseconds(1000); - Removed this line
  delayMicroseconds(10);          // Added this line
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration/2) / 29.1;
  
  if (distance >= 390 || distance <= 3)
  {
    Serial.println("Out of range");
  }
  else 
   {
    Serial.print(distance);
    Serial.println(" cm");
  }
  delay(500);
}