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

#define DHTPIN 15
#define DHTTYPE DHT22

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

bool displayTemperature = true;
unsigned long lastDisplayChange = 0;
unsigned long displayChangeInterval = 2000;

void setup() {
  Serial.begin(9600);
  dht.begin();
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("suhu : ");
}

void loop() {
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  if (isnan(humidity) || isnan(temperature)) {
    Serial.println("gagal membaca data dari DHT22");
    return;
  }

  unsigned long currentMillis = millis();

  if (currentMillis - lastDisplayChange >= displayChangeInterval) {
    lastDisplayChange = currentMillis;
    displayTemperature = !displayTemperature;
    lcd.clear();
    lcd.setCursor(0,0);
    if (displayTemperature) {
      lcd.print("suhu: ");
      lcd.print(temperature);
      lcd.print(" C");
    } else {
      lcd.print("Kelembaban: ");
      lcd.print(humidity);
      lcd.print(" %");
    }
  }

  Serial.print("Suhu: ");
  Serial.print(temperature);
  Serial.print(" C | Kelembaban: ");
  Serial.print(humidity);
  Serial.print(" %");

}