Arduino Ultrasonic Sensor

    For this project, we will need an Arduino Uno r3 board, an HC-SR04 Ultrasonic Sensor, and some jumper wires. Below Is a model and the code of it.

Code:

    

const int trigPin = 9;

const int echoPin = 10;

long duration;

int distance;

void setup() {

  Serial.begin(9600);

  pinMode(trigPin, OUTPUT);

  pinMode(echoPin, INPUT);

}

void loop() {

  // Send trigger pulse

  digitalWrite(trigPin, LOW);

  delayMicroseconds(2);

  digitalWrite(trigPin, HIGH);

  delayMicroseconds(10);

  digitalWrite(trigPin, LOW);

  // Read echo pulse

  duration = pulseIn(echoPin, HIGH);

  // Convert time to distance (cm)

  distance = duration * 0.034 / 2;

  // Show on Serial Monitor

  Serial.print("Distance: ");

  Serial.print(distance);

  Serial.println(" cm");

  delay(500);

}