Smart Blind stick Code

Code

int trigpin = 4;

int echopin = 5;

int buzzer= 3;

long duration;

int distance;

void setup()

{

  pinMode(3,OUTPUT);

  pinMode(trigpin, OUTPUT);

  pinMode(echopin, INPUT);

  

}

void loop()

{

  digitalWrite(trigpin, LOW);

  delayMicroseconds(2);

  digitalWrite(trigpin, HIGH);

  delayMicroseconds(10);

  digitalWrite(trigpin, LOW);

  

  duration = pulseIn(echopin, HIGH);

  distance = duration*0.034/2;

  Serial.print("Distance: ");

  Serial.println(distance);

  

  if(distance<30)

  {

    digitalWrite(3, HIGH);

  }

  else

  {

    digitalWrite(3, LOW);

  }

}