// Include the necessary libraries
#include <WiFi.h>
#include <BlynkSimpleEsp32.h>

#define BLYNK_TEMPLATE_ID "TMPL3wHK-n7GF"
#define BLYNK_TEMPLATE_NAME "Security Based System"
// Replace with your network credentials
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// Replace with your Blynk authentication token
const char* auth = "xV7-WVvCyC2b_cSK7vUSHKyP-E0-yrIH";

// Pin connected to the PIR sensor
const int pirPin = 15;

// Pin connected to the buzzer
const int buzzerPin = 2;

// Pin connected to the LED
const int ledPin = 4;

// Variable to store the previous state of the PIR sensor
int previousState = LOW;

void setup() {
  // Initialize serial communication
  Serial.begin(115200);

  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  // Connect to Blynk
  Blynk.begin(auth, ssid, password);
  Serial.println("Connected to Blynk");

  // Configure PIR sensor pin
  pinMode(pirPin, INPUT);

  // Configure buzzer pin
  pinMode(buzzerPin, OUTPUT);
  noTone(buzzerPin);

  // Configure LED pin
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, LOW);

  // Initialize the Blynk virtual pins
  Blynk.virtualWrite(V1, LOW);
  Blynk.virtualWrite(V2, LOW); // Set the LED initially to OFF state
  #define BUZZER_STATUS_PIN V3 // Replace V3 with the desired virtual pin number
  Blynk.virtualWrite(BUZZER_STATUS_PIN, LOW); // Set the initial status for the buzzer (LOW for OFF)

}

void loop() {
  // Run Blynk
  Blynk.run();

  // Read the state of the PIR sensor
  int currentState = digitalRead(pirPin);

  // Check for motion detection
  if (currentState == HIGH && previousState == LOW) {
    // Motion detected
    Serial.println("Motion detected!");

    // Turn on the LED
    digitalWrite(ledPin, HIGH);
Serial.println("Motion Detected");
    // Activate the buzzer
    tone(buzzerPin, 1000, 500);
    // Send buzzer status to the Blynk app
    Blynk.virtualWrite(BUZZER_STATUS_PIN, HIGH); // Set buzzer status to HIGH (ON)

    // Send motion data to the Blynk app
    Blynk.virtualWrite(V1, 1);
    // Send LED control data to the Blynk app
    Blynk.virtualWrite(V2, HIGH); // Set LED to ON state
  } else if (currentState == LOW && previousState == HIGH) {
    // Motion stopped
    Serial.println("Motion stopped!");

    // Turn off the LED
    digitalWrite(ledPin, LOW);

    // Send motion data to the Blynk app
    Blynk.virtualWrite(V1, 0);
    // Send LED control data to the Blynk app
    Blynk.virtualWrite(V2, LOW); // Set LED to OFF state
    // Deactivate the buzzer
    noTone(buzzerPin);
    // Send buzzer status to the Blynk app
    Blynk.virtualWrite(BUZZER_STATUS_PIN, LOW); // Set buzzer status to LOW (OFF)
  }

  // Update the previous state
  previousState = currentState;
}