#include <Ultrasonic.h>

const int trigPin = 27;  // Trigger pin of the ultrasonic sensor
const int echoPin = 14;  // Echo pin of the ultrasonic sensor
const int buzzerPin = 26;  // Buzzer pin
const int ledPin = 12;  // LED pin

Ultrasonic ultrasonic(trigPin, echoPin);

void setup() {
  Serial.begin(115200);
  pinMode(buzzerPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  // Measure distance using the ultrasonic sensor
  int distance = ultrasonic.read();

  // Print distance to Serial Monitor
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  // Check if distance is less than or equal to 50cm
  if (distance <= 50) {
    // Trigger buzzer and LED
    digitalWrite(buzzerPin, HIGH);
    digitalWrite(ledPin, HIGH);
    delay(1000);  // Buzzer and LED ON for 1 second
    digitalWrite(buzzerPin, LOW);
    digitalWrite(ledPin, LOW);
  }

  delay(500);  // Add a small delay for stability
}