#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_PULLUP);
}

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)
int btn = digitalRead(buttonPin);

if (btn == LOW) {
  digitalWrite(ledPin1, HIGH);
  Blynk.virtualWrite(V3, 1); // Trigger virtual pin for door/window notification
  Serial.println("Button is pressed");
} else {
  digitalWrite(ledPin1, LOW);
  Blynk.virtualWrite(V3, 0); // Reset virtual pin for door/window notification
  Serial.println("Button is released");
}
delay(10); // this speeds up the simulation
  

  // 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);
}