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

#define DHTPIN 2
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);

int ledPin = 7;

void setup() {
  Serial.begin(9600);
  dht.begin();
  pinMode(ledPin, OUTPUT);
  lcd.begin(16, 2);
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Suhu: ");
}

void loop() {
  delay(2000);
  
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Gagal membaca data dari sensor DHT!");
    return;
  }
  
  Serial.print("Suhu: ");
  Serial.print(temperature);
  Serial.print(" °C, Kelembapan: ");
  Serial.print(humidity);
  Serial.println("%");
  
  lcd.setCursor(6, 0);
  lcd.print(temperature);
  lcd.print(" C ");
  
  if (temperature > 30) {
    digitalWrite(ledPin, HIGH);
  } else {
    digitalWrite(ledPin, LOW);
  }
}