#include <ESP32Servo.h>
#include <DHT.h>

// **Define Pins**
#define PIR_PIN 4
#define ULTRASONIC_TRIG 5
#define ULTRASONIC_ECHO 18
#define LED_PIN 19
#define BUZZER_PIN 21
#define SERVO_PIN 14
#define MQ_SENSOR_PIN 34
#define DHT_PIN 23
#define DHTTYPE DHT22

Servo doorServo;
DHT dht(DHT_PIN, DHTTYPE);

void setup() {
    Serial.begin(115200);
    
    pinMode(PIR_PIN, INPUT);
    pinMode(ULTRASONIC_TRIG, OUTPUT);
    pinMode(ULTRASONIC_ECHO, INPUT);
    pinMode(LED_PIN, OUTPUT);
    pinMode(BUZZER_PIN, OUTPUT);
    
    doorServo.attach(SERVO_PIN);
    doorServo.write(0); // Door starts closed
    
    dht.begin();
}

void loop() {
    int pirState = digitalRead(PIR_PIN);
    int smokeLevel = analogRead(MQ_SENSOR_PIN);
    float humidity = dht.readHumidity();
    float temperature = dht.readTemperature();
    
    // ** Automatic Light Control**
    digitalWrite(LED_PIN, pirState ? HIGH : LOW);
    Serial.print("PIR Sensor State: "); Serial.println(pirState);

    // ** Ultrasonic Sensor - Door Opening**
    digitalWrite(ULTRASONIC_TRIG, LOW);
    delayMicroseconds(2);
    digitalWrite(ULTRASONIC_TRIG, HIGH);
    delayMicroseconds(10);
    digitalWrite(ULTRASONIC_TRIG, LOW);
    
    long duration = pulseIn(ULTRASONIC_ECHO, HIGH, 30000); 
    int distance = (duration > 0) ? (duration * 0.034 / 2) : 100;

    Serial.print("Ultrasonic Distance: "); Serial.print(distance); Serial.println(" cm");

    if (distance < 30) { 
        Serial.println("Object Detected! Opening Door...");
        doorServo.write(90);
        delay(2000);
        doorServo.write(0);
    }

    // **Cloth Protection**
    Serial.print("Humidity: "); Serial.print(humidity); Serial.println("%");
    if (humidity > 85) {
        Serial.println("Rain Detected! Move Clothes Inside.");
    }

    // ** Smoke Detection **
    Serial.print("Smoke Level: "); Serial.println(smokeLevel);
    if (smokeLevel > 400) {
        digitalWrite(BUZZER_PIN, HIGH);
        Serial.println("Smoke Detected! Alert!");
    } else {
        digitalWrite(BUZZER_PIN, LOW);
    }
    
    delay(1000);
}