#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <RTClib.h>
#include <DHT.h>
#include <OneWire.h>
#include <DallasTemperature.h>

// Deklarasi pin dan objek
LiquidCrystal_I2C lcd(0x27, 20, 4);
RTC_DS3231 rtc;

#define DHTPIN 13
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

#define ONE_WIRE_BUS 14
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

#define TDS_PIN 35             // Pin analog untuk sensor TDS
const float TDS_FACTOR = 0.5;  // Faktor konversi untuk sensor TDS
float voltage, tdsValue;

float calibration_value = 21.34;
int analogPin = 34;  // Pin analog untuk pH sensor
float ph_act;

// Deklarasi pin untuk relay
#define RELAY1_PIN 25
#define RELAY2_PIN 26

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

  // Inisialisasi pin relay sebagai output
  pinMode(RELAY1_PIN, OUTPUT);
  pinMode(RELAY2_PIN, OUTPUT);

  // Pastikan relay mati pada awal
  digitalWrite(RELAY1_PIN, LOW);
  digitalWrite(RELAY2_PIN, LOW);

  // Splash Screen
  lcd.clear();
  lcd.setCursor(0, 1);
  lcd.print("   Smart Farming   ");
  lcd.setCursor(0, 2);
  lcd.print("  Hydroponics  IoT   ");
  delay(1000);
  lcd.clear();

  // Display initializing with loading dots
  lcd.setCursor(0, 1);
  lcd.print(" Initializing");
  for (int i = 0; i < 3; i++) {
    delay(750);
    lcd.print(" .");
  }

  if (!rtc.begin()) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Couldn't find RTC");
    while (1)
      ;
  }

  if (rtc.lostPower()) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("RTC lost power");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));  // Set RTC to compile time
  }
}

void loop() {
  DateTime now = rtc.now();
  float humidity = dht.readHumidity();
  float tempDHT = dht.readTemperature();
  sensors.requestTemperatures();
  float tempDS = sensors.getTempCByIndex(0);

  int analogValue = analogRead(analogPin);
  float voltage = analogValue * (3.3 / 4095.0);
  ph_act = -5.70 * voltage + calibration_value;

  // Membaca data TDS
  int tdsAnalog = analogRead(TDS_PIN);
  voltage = tdsAnalog * (3.3 / 4095.0);
  tdsValue = (voltage * 1000) / TDS_FACTOR;

  bool relay1State = (tempDHT > 30.0);
  bool relay2State = (tempDS > 25.0);

  digitalWrite(RELAY1_PIN, relay1State ? HIGH : LOW);  // Kontrol relay 1
  digitalWrite(RELAY2_PIN, relay2State ? HIGH : LOW);  // Kontrol relay 2

  // Tampilkan tanggal, waktu, suhu, kelembaban, nilai pH, dan TDS
  lcd.clear();

  // Baris 1: Tanggal dan Waktu
  lcd.setCursor(0, 0);
  lcd.print(now.day(), DEC);
  lcd.print('/');
  lcd.print(now.month(), DEC);
  lcd.print('/');
  lcd.print(now.year(), DEC);
  lcd.print("       ");
  lcd.print(now.hour(), DEC);
  lcd.print(':');
  lcd.print(now.minute(), DEC);

  // Baris 2: Suhu dari DHT dan Kelembaban
  lcd.setCursor(0, 1);
  lcd.print("T=");
  lcd.print(tempDHT);
  lcd.print("*C H=");
  lcd.print(humidity);
  lcd.print("%");

  // Baris 3: Suhu dari DS18B20 dan pH
  lcd.setCursor(0, 2);
  lcd.print("TW=");
  lcd.print(tempDS);
  lcd.print("*C PPM=");
  lcd.print(tdsValue);

  // Baris 4: Nilai TDS
  lcd.setCursor(0, 3);
  lcd.print("PH=");
  lcd.print(ph_act);
  lcd.print(" R1:");
  lcd.print(relay1State ? "ON" : "OF");
  lcd.print(" R2:");
  lcd.print(relay2State ? "ON" : "OF");

  // Logika kontrol relay berdasarkan suhu
  if (tempDHT > 30.0) {
    digitalWrite(RELAY1_PIN, HIGH);  // Nyalakan relay 1 jika suhu DHT lebih dari 30°C
  } else {
    digitalWrite(RELAY1_PIN, LOW);  // Matikan relay 1 jika suhu DHT 30°C atau kurang
  }

  if (tempDS > 25.0) {
    digitalWrite(RELAY2_PIN, HIGH);  // Nyalakan relay 2 jika suhu DS18B20 lebih dari 25°C
  } else {
    digitalWrite(RELAY2_PIN, LOW);  // Matikan relay 2 jika suhu DS18B20 25°C atau kurang
  }

  delay(2000);
}