#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>

// Konfigurasi DHT22
#define DHTPIN 4  // Gunakan GPIO4
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// Konfigurasi LCD I2C
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Konfigurasi LED
#define LED_BIRU 18 // NIEBIESKA
#define LED_MERAH 19 // CZERWONA

void setup() {
    Serial.begin(115200);
    dht.begin();
    lcd.init();
    lcd.backlight();
    pinMode(LED_BIRU, OUTPUT);
    pinMode(LED_MERAH, OUTPUT);
    
    lcd.setCursor(0, 0);
    lcd.print("Mengukur...");
    delay(1000); // Tunggu sensor siap
}

void loop() {
    float suhu = dht.readTemperature();
    float kelembaban = dht.readHumidity();
    
    if (isnan(suhu) || isnan(kelembaban)) {
        Serial.println("Gagal membaca DHT22! Periksa kabel.");
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Sensor Error!");
        lcd.setCursor(0, 1);
        lcd.print("Periksa kabel!");
        
        digitalWrite(LED_BIRU, LOW);
        digitalWrite(LED_MERAH, LOW);
    } else {
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Suhu");                 
        lcd.print(suhu);
        lcd.print("C");
        
        lcd.setCursor(0, 1);
        lcd.print("Humid: ");
        lcd.print(kelembaban);
        lcd.print("%");
        
        // LED niebieska reaguje na temperaturę
        if (suhu > 30.0) {
            digitalWrite(LED_BIRU, HIGH);
        } else {
            digitalWrite(LED_BIRU, LOW);
        }
        
        // LED czerwona reaguje na wilgotność
        if (kelembaban > 70.0) {
            digitalWrite(LED_MERAH, HIGH);
        } else {
            digitalWrite(LED_MERAH, LOW);
        }
    }
    
    delay(2000); // Update setiap 2 detik
}