Script for Project 1

// Define pins for the Ultrasonic sensor

const int trigPin = 12;  // Trig pin connected to pin 9

const int echoPin = 11; // Echo pin connected to pin 10

// Variables to store the duration and distance

long duration;

int distance;

void setup() {

  // Initialize the Serial Monitor

  Serial.begin(9600);

  // Set the trigPin as OUTPUT and echoPin as INPUT

  pinMode(trigPin, OUTPUT);

  pinMode(echoPin, INPUT);

}

void loop() {

  // Clear the trigPin by setting it LOW for 2 microseconds

  digitalWrite(trigPin, LOW);

  delayMicroseconds(2);

  // Trigger the sensor by setting the trigPin HIGH for 10 microseconds

  digitalWrite(trigPin, HIGH);

  delayMicroseconds(10);

  digitalWrite(trigPin, LOW);

  // Read the echoPin, returns the time in microseconds

  duration = pulseIn(echoPin, HIGH);

  // Calculate the distance (duration / 2) / 29.1

  distance = duration * 0.034 / 2;

  // Print the distance to the Serial Monitor

  Serial.print(“Distance: “);

  Serial.print(distance);

  Serial.println(” cm”);

  // Wait for 1 second before repeating

  delay(1000);

}