#include <DHT.h>
#include <Servo.h>
#include <Wire.h>
#include <LiquidCrystal_PCF8574.h>  // Ganti dengan library PCF8574

#define DHTPIN 2          // Pin DHT22
#define DHTTYPE DHT22
#define ECHO_PIN 3        // Pin Echo pada HC-SR04
#define TRIG_PIN 4        // Pin Trig pada HC-SR04
#define BUZZER_PIN 5      // Pin Buzzer
#define SERVO_PIN 6       // Pin Servo

DHT dht(DHTPIN, DHTTYPE);
Servo myServo;
LiquidCrystal_PCF8574 lcd(0x27); // Menggunakan alamat I2C 0x27

void setup() {
    Serial.begin(9600);
    dht.begin();
    myServo.attach(SERVO_PIN);
    pinMode(TRIG_PIN, OUTPUT);
    pinMode(ECHO_PIN, INPUT);
    pinMode(BUZZER_PIN, OUTPUT);
    myServo.write(0);    // Set servo awal pada posisi 0 derajat

    // Inisialisasi LCD
    lcd.begin(20, 4);
    lcd.setBacklight(255);
    lcd.setCursor(0, 0);
    lcd.print("Initializing...");
    delay(2000);
    lcd.clear();
}

void loop() {
    // Baca suhu dan kelembaban dari DHT22
    float humidity = dht.readHumidity();
    float temperature = dht.readTemperature();
    
    // Baca jarak dari HC-SR04
    digitalWrite(TRIG_PIN, LOW);
    delayMicroseconds(2);
    digitalWrite(TRIG_PIN, HIGH);
    delayMicroseconds(10);
    digitalWrite(TRIG_PIN, LOW);
    long duration = pulseIn(ECHO_PIN, HIGH);
    float distance = duration * 0.034 / 2;

    // Kondisi 1: Cek kelembaban atau suhu
    if (humidity > 70 || temperature > 30) {
        myServo.write(90);  // Putar servo ke posisi 90 derajat
    } else {
        myServo.write(0);   // Kembalikan servo ke posisi awal
    }

    // Kondisi 2: Cek jarak objek
    if (distance < 10) {
        digitalWrite(BUZZER_PIN, HIGH);   // Nyalakan buzzer
    } else {
        digitalWrite(BUZZER_PIN, LOW);    // Matikan buzzer
    }

    // Tampilkan data pada LCD
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Temp: ");
    lcd.print(temperature);
    lcd.print(" C");

    lcd.setCursor(0, 1);
    lcd.print("Humidity: ");
    lcd.print(humidity);
    lcd.print(" %");

    lcd.setCursor(0, 2);
    lcd.print("Distance: ");
    lcd.print(distance);
    lcd.print(" cm");

    // Tampilkan status servo
    lcd.setCursor(0, 3);
    if (humidity > 70 || temperature > 30) {
        lcd.print("Servo: OPEN");
    } else {
        lcd.print("Servo: CLOSED");
    }

    delay(500);
}