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

// Konfigurasi LCD 1604
#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

// Konfigurasi DHD22 (Sensor Temperatur/Kelembapan)
#define DHT_PIN      2
#define DHT_TYPE     DHT22
#define DHT_INTERVAL 1000
DHT dht(DHT_PIN, DHT_TYPE);

// Karakter derajat
uint8_t derajat[] = {
  0b01110,
  0b10001,
  0b10001,
  0b01110,
  0b00000,
  0b00000,
  0b00000,
  0b00000
};

float suhuCelcius, suhuFahrenheit, kelembapan;
uint32_t timerDHT = DHT_INTERVAL;
String dataSuhu;
String dataKelembapan;

// Mengambil data DHT22
void getDHTSensorData(){
  if((millis()-timerDHT)>DHT_INTERVAL){
    timerDHT=millis();

    // Membaca suhu dalam Celcius (default)
    suhuCelcius=dht.readTemperature();

    // Membaca suhu dalam Fahrenheit (isFahrenheit=true)
    suhuFahrenheit=dht.readTemperature(true);

    // Membaca kelembapan
    kelembapan=dht.readHumidity();

    // Cek jika terjadi kegagalan membaca sensor (langsung exit)
    if(isnan(suhuCelcius) || isnan(suhuFahrenheit) || isnan(kelembapan)){
      Serial.println("Gagal membaca sensor DHT");
      return;
    }
  }
}

void setup() {
  lcd.init();
  lcd.backlight();
  Serial.begin(9600);
  dht.begin();

  lcd.createChar(1, derajat);
  lcd.setCursor(3, 0);
  lcd.print("Temperature :");
  lcd.setCursor(3,2);
  lcd.print("Kelembapan  :");
}

void loop() {
  getDHTSensorData();
  dataSuhu=String(suhuCelcius)+"\1C"+"/"+String(suhuFahrenheit)+"\1F";
  dataKelembapan=String(kelembapan)+"%";
  lcd.setCursor(2,1);
  lcd.print(dataSuhu);
  lcd.setCursor(7,3);
  lcd.print(dataKelembapan);
}