/**void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, Muthu");
  Serial.println("Let's Go!!");
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}


PIR output connectted in ESP pin 13

DHT22 output connectted in ESP pin 14

LED(assume LED as Buzzer) output connectted in ESP pin 15

Button output connectted in ESP pin 18

**/
#define BLYNK_TEMPLATE_ID "TMPL3PP98wbLx"
#define BLYNK_TEMPLATE_NAME "Home automation Version 1"
#define BLYNK_AUTH_TOKEN "2wjduz1ULBIH1fqyZxsbEgskupZX4swl"

#define BLYNK_PRINT Serial

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>

// Blynk Authentication Token
char auth[] = BLYNK_AUTH_TOKEN;

// WiFi credentials
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// DHT sensor settings
#define DHTPIN 14
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// PIR sensor pin
const int pirPin = 13;
// Buzzer pin
const int buzzerPin = 15;
// LED pin
const int ledPin = 16;
const int ledPin1 = 17;
// Button pin
const int buttonPin = 18;

// Variables
int pirState = LOW;
int buttonState = LOW;
int oldValue = HIGH; 

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

  // Initialize Blynk
  Blynk.begin(auth, ssid, pass);

  // Initialize DHT sensor
  dht.begin();

  // Initialize pins
  pinMode(pirPin, INPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(ledPin1, OUTPUT);
  pinMode(buttonPin, INPUT);
}

void loop() {
  Blynk.run();
  readSensors();
}

void readSensors() {
  // Read PIR sensor
  pirState = digitalRead(pirPin);
  if (pirState == HIGH) {
    Serial.println(pirState);
    digitalWrite(buzzerPin, HIGH);
    digitalWrite(ledPin, HIGH);
    delay(1000);
    Blynk.virtualWrite(V2, 1); // Trigger virtual pin for motion notification
  } else {
    digitalWrite(buzzerPin, LOW);
    digitalWrite(ledPin, LOW);
    delay(1000);
    Blynk.virtualWrite(V2, 0); // Reset virtual pin for motion notification
  }

  //Read button (door/window sensor)
  buttonState = digitalRead(buttonPin);
  /**
  if (buttonState == LOW) {
    digitalWrite(ledPin1, HIGH);
    delay(1000);
    Blynk.virtualWrite(V3, 1); // Trigger virtual pin for door/window notification
  } else {
    Blynk.virtualWrite(V3, 0); // Reset virtual pin for door/window notification
  }

**/

  int newValue = buttonState;

  // Check if the value was changed,
  // by comparing it with the previous value.
  if(newValue != oldValue)
  {
    if(newValue == LOW)
    {
      digitalWrite(ledPin1, HIGH);
      //delay(2000);
      Blynk.virtualWrite(V3, 1); // Trigger virtual pin for door/window notification
      delay(2000);
      Serial.println("The button is pressed.");
    }
    else
    {
      digitalWrite(ledPin1, LOW);
      Blynk.virtualWrite(V3, 0); // Reset virtual pin for door/window notification
      delay(2000);
      Serial.println("The button is released.");
    }
    // Remember the value for the next time.
    oldValue = newValue;
  }
  

  // Read DHT sensor
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  // Send sensor data to Blynk
  Blynk.virtualWrite(V0, t); // Temperature
  Blynk.virtualWrite(V1, h); // Humidity
  delay(100);
}