#include <Wire.h>                 // Library untuk I2C 
#include <LiquidCrystal_I2C.h>    
#include <DHT.h>                  // Library untuk sensor DHT22
#include <RTClib.h>                // Library untuk RTC DS3231
#include <SD.h>


// menentukan sensor dan pin LCD
#define DHTPIN 7  // Pin data DHT 22 terhubung ke pin 7 arduino
#define DHTTYPE DHT22   // Jenis sensor DHT22
#define CS_PIN A0

DHT dht(DHTPIN, DHTTYPE);

LiquidCrystal_I2C lcd(0x27, 20, 4);  // Alamat I2C LCD

int relayPin = 8; // Pin kontrol Relay CH1
int indicatorPin = 11; // Pin lampu indikator L1

int relayPin2 = 9; // Pin relay CH2
int indicatorPin2 = 12; // Pin lampu indikator L2

RTC_DS1307 rtc;
File dataFile;

const int chipSelect = 53; // Sesuaikan dengan pin CS pada modul MicroSD

void setup() {
  Serial.begin(9600);;

  dht.begin();
  lcd.init();
  lcd.backlight();
  rtc.begin();
  pinMode(relayPin, OUTPUT);
  pinMode(relayPin2, OUTPUT);
  pinMode(indicatorPin, OUTPUT);
  pinMode(indicatorPin2, OUTPUT);

  digitalWrite(relayPin2, LOW); // Matikan relay awalnya

  if (!rtc.isrunning()) {
    Serial.println("RTC tidak berjalan! Atur waktu pada RTC terlebih dahulu.");
  }
 

  if (!rtc.begin()) {
    Serial.println("Gagal menginisialisasi modul RTC.");
    while (1);
  }

// Inisialisasi kartu MicroSD
  if (!SD.begin(chipSelect)) {
    Serial.println("Gagal menginisialisasi kartu MicroSD.");
    return;
  }

 // Inisialisasi RTC DS1307
  Wire.begin();
  if (!rtc.begin()) {
    Serial.println("Gagal menginisialisasi modul RTC.");
    while (1);
  }

 // Cek apakah RTC berjalan
  if (!rtc.isrunning()) {
    Serial.println("RTC tidak berjalan! Atur waktu pada RTC terlebih dahulu.");
  }

  // Buka atau buat file untuk ditulis
  dataFile = SD.open("data.csv", FILE_WRITE);
  
  // Cek apakah file berhasil dibuka
  if (dataFile) {
    Serial.println("File berhasil dibuka.");
    // Menulis header ke file
    dataFile.println("Waktu");
    dataFile.close(); // Menutup file
  } else {
    Serial.println("Gagal membuka file.");
  }

}

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

  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(" %");

  DateTime now = rtc.now();

  lcd.setCursor(0, 2);
  lcd.print("Date: ");
  lcd.print(now.year(), DEC);
  lcd.print("/");
  lcd.print(now.month(), DEC);
  lcd.print("/");
  lcd.print(now.day(), DEC);

  lcd.setCursor(0, 3);
  lcd.print("Time: ");
  lcd.print(now.hour(), DEC);
  lcd.print(":");
  lcd.print(now.minute(), DEC);
  lcd.print(":");
  lcd.print(now.second(), DEC);

  delay(2000);  // Delay selama 2 detik sebelum pembacaan berikutnya

// Cek apakah sensor membaca data yang valid
  if (isnan(humidity) || isnan(temperature)) {
    Serial.println("Gagal membaca sensor DHT22!");
    return;
  }
 
  Serial.print("Suhu: ");
  Serial.print(temperature);
  Serial.println("°C");
  Serial.print("Kelembaban: ");
  Serial.print(humidity);
  Serial.println("%");

 // Atur kondisi untuk mengaktifkan atau menonaktifkan relay dan lampu indikator pada Shoes dryer deodorizing
  if (temperature >= 25.0) {
    digitalWrite(relayPin, HIGH); // Relay aktif
    digitalWrite(indicatorPin, HIGH); // Lampu indikator menyala
  } 
  else {
    digitalWrite(relayPin, LOW); // Relay non-aktif
    digitalWrite(indicatorPin, LOW); // Lampu indikator mati
  }

  delay(1000); // Interval pembacaan sensor (1 detik)

 // Kontrol kipas DC dan indikator berdasarkan suhu dan kelembaban
  if (temperature > 40 && humidity > 50) {
    digitalWrite(relayPin2, HIGH); // Hidupkan relay (nyalakan kipas DC)
    digitalWrite(indicatorPin2, HIGH);   // Nyalakan LED indikator
  } else {
    digitalWrite(relayPin2, LOW);  // Matikan relay (matikan kipas DC)
    digitalWrite(indicatorPin2, LOW);    // Matikan LED indikator
  }

  delay(1000); // Baca suhu dan kelembaban setiap 1 detik

 Serial.print("Tanggal dan Waktu: ");
  Serial.print(now.year(), DEC);
  Serial.print('/');
  Serial.print(now.month(), DEC);
  Serial.print('/');
  Serial.print(now.day(), DEC);
  Serial.print(" ");
  Serial.print(now.hour(), DEC);
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  Serial.println();

  if (dataFile) {
    dataFile.print(now.year(), DEC);
    dataFile.print('/');
    dataFile.print(now.month(), DEC);
    dataFile.print('/');
    dataFile.print(now.day(), DEC);
    dataFile.print(" ");
    dataFile.print(now.hour(), DEC);
    dataFile.print(':');
    dataFile.print(now.minute(), DEC);
    dataFile.print(':');
    dataFile.print(now.second(), DEC);
    dataFile.println();
  }

  delay(1000);

  Serial.print("Waktu: ");
  Serial.print(now.year(), DEC);
  Serial.print('/');
  Serial.print(now.month(), DEC);
  Serial.print('/');
  Serial.print(now.day(), DEC);
  Serial.print(" ");
  Serial.print(now.hour(), DEC);
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  Serial.println();

  // Menulis data waktu ke file di kartu MicroSD
  dataFile = SD.open("data.csv", FILE_WRITE);
  if (dataFile) {
    // Format data waktu sebagai CSV
    String waktu = String(now.year()) + "-" + String(now.month()) + "-" + String(now.day()) + " " + String(now.hour()) + ":" + String(now.minute()) + ":" + String(now.second());
    
    dataFile.println(waktu);
    dataFile.close();
    Serial.println("Data waktu telah disimpan di kartu MicroSD.");
  } else {
    Serial.println("Gagal membuka file.");
  }

  delay(1000); // Tunggu 1 detik sebelum membaca waktu lagi
}