#define TRIGGER_PIN 12
#define ECHO_PIN 14
#define OCCUPANCY_THRESHOLD 50 // Adjust this value based on your setup

void setup() {
  Serial.begin(9600);
  pinMode(TRIGGER_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
}

void loop() {
  long duration, distance;
  
  // Trigger ultrasonic sensor
  digitalWrite(TRIGGER_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGGER_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGGER_PIN, LOW);
  
  // Read the duration of the echo
  duration = pulseIn(ECHO_PIN, HIGH);
  
  // Calculate distance in centimeters
  distance = duration * 0.034 / 2;
  
  // Print distance to serial monitor
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");
  
  // Check if parking space is occupied
  if (distance < OCCUPANCY_THRESHOLD) {
    Serial.println("Parking space is occupied");
    // Add your code to perform actions when the parking space is occupied
  } else {
    Serial.println("Parking space is vacant");
    // Add your code to perform actions when the parking space is vacant
  }
  
  delay(1000); // Adjust the delay based on your requirements
}