#define BLYNK_TEMPLATE_ID "TMPL2ju_xMfb-"
#define BLYNK_TEMPLATE_NAME "samrt building"
#define BLYNK_AUTH_TOKEN "Lru4m-di5mMpaYYg9E30hMwRlO1zYahZ"
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "DHT.h"
#include <ESP32Servo.h>
#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#define BLYNK_PRINT Serial

// Define Pins
#define DHTPIN 4      // DHT sensor pin
#define ldrPin 27     // Smoke sensor pin
#define redLedPin 12  // Red LED pin
#define blueLedPin 2  // blue LED pin
#define greenLedPin 13// Green LED pin
#define buzzerPin 14  // Buzzer pin
#define SERVO_PIN 5     // Servo motor pin
#define PIR_PIN 15       // PIR sensor pin
// Define Pins Blynk serial

#define BLYNK_PRINT Serial
// LCD
LiquidCrystal_I2C lcd(0x27, 16, 3); 

// DHT Sensor
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
// Servo motor
Servo servo;
// connexion configuration 
char auth[] = "Lru4m-di5mMpaYYg9E30hMwRlO1zYahZ";
const char ssid[] = "Wokwi-GUEST";
const char password[] = "";
BlynkTimer timer;

// Variables for temperature and humidity
float temperature_, humidity;

void setup() {
    Serial.begin(9600); // Start the serial communication

    // Initialize LCD
    lcd.init();
    lcd.backlight();
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print(F("Starting..."));

    // Initialize DHT sensor
    dht.begin();
    servo.attach(SERVO_PIN); // Attach the servo to the corresponding pin
    // connect to Blynk
    Blynk.begin(auth, ssid, password);
    
    // Set pin modes for smoke detection system
    pinMode(redLedPin, OUTPUT);
    pinMode(greenLedPin, OUTPUT);
    pinMode(blueLedPin, OUTPUT);
    pinMode(buzzerPin, OUTPUT);
    pinMode(ldrPin, INPUT);
    pinMode(PIR_PIN, INPUT); // Set PIR sensor pin as input


    delay(500); // Short delay before starting the main loop
}

void loop() {
  
    // Read temperature and humidity from DHT sensor
    temperature_ = dht.readTemperature();
    humidity = dht.readHumidity();
    int initialServoPosition = 0;  // Position initiale du servo
    // Update LCD with temperature and humidity
    lcd.setCursor(0, 0);
    lcd.print("T:");
    lcd.print(temperature_, 1);
    lcd.print("C H:");
    lcd.print(humidity, 1);
    lcd.print("%");

     // Read PIR sensor state
    int motionState = digitalRead(PIR_PIN);
    int sensorValue;
    sensorValue = analogRead(ldrPin);
    Serial.print("LDR Value: ");
    Serial.println(sensorValue);

    // Send temperature and humidity data to the serial monitor and Blynk
    Serial.print("Temperature: ");
    Serial.print(temperature_);
    Blynk.virtualWrite(V0,temperature_);
    Serial.print("C, Humidity: ");
    Serial.print(humidity);
    Blynk.virtualWrite(V1,humidity);
    Serial.println("%");
    Serial.print("LDR: ");

    // Control the servo based on temperature
    if (temperature_ > 25.0) {
        // If temperature is above 25°C, turn on the fan continuously
         digitalWrite(blueLedPin, HIGH);
         lcd.setCursor(0, 1);
         lcd.print("Fan: ON ");
         Serial.println("Fan:ON");
    } else {
        // If temperature is below 25°C, turn off the fan
        digitalWrite(blueLedPin, LOW);
         lcd.setCursor(0, 1);
         lcd.print("Fan: OFF");
        }
    // fire detection logic
    if (sensorValue < 500) {
        digitalWrite(redLedPin, HIGH);
        digitalWrite(greenLedPin, LOW);
        tone(buzzerPin, 100);
         lcd.setCursor(0, 3);
         lcd.print("Fire detected ");
        Serial.print(sensorValue);
         Blynk.virtualWrite(V2,humidity);
        Serial.println(" Fire detected ");
          for (int angle = 0; angle <= 180; angle += 1) {
            servo.write(angle);
            delay(15); // Adjust the delay as needed for the speed of rotation
        }
    } else {
        digitalWrite(redLedPin, LOW);
        digitalWrite(greenLedPin, HIGH);
        noTone(buzzerPin);
        lcd.setCursor(0, 3);
        lcd.print("              ");
        Serial.println(" Nothing detected.");
        servo.write(initialServoPosition);
    }
    
    // Print motion detection to LCD
    lcd.setCursor(0, 2);
    if (motionState == HIGH) {
        lcd.print("Object Detected");
        Serial.println("Object Detected");
       Blynk.virtualWrite(V3,1);    
    } else {
        lcd.print("                  "); // Clear the line if no motion
        Blynk.virtualWrite(V3,0);    
    }    

    delay(1000); // Wait for 1 second before reading the sensor again.
}