using millis() in ultrasonic sensor program in tamil

Coding

#define trig 5

#define echo 4

void setup() {

  Serial.begin(9600);

  pinMode(trig,OUTPUT);

  pinMode(echo,INPUT);

  pinMode(13,OUTPUT);

  pinMode(12,OUTPUT);

  digitalWrite(12,HIGH);

  delay(2000);

}



void loop() {

  digitalWrite(13,HIGH);

  digitalWrite(12,LOW);

  delay(1000);

  digitalWrite(13,LOW);

  digitalWrite(12,HIGH);

  delay(2000);

 

  long duration , distance;

 

  digitalWrite(trig,LOW);

  delay(2);

  digitalWrite(trig,HIGH);

  delay(2);

  digitalWrite(trig,LOW);

 

  duration= pulseIn(echo,HIGH);

  distance=(duration/2)/29.1;

  Serial.println(distance);

}