#include <OneWire.h>
#include <DallasTemperature.h> //https://github.com/milesburton/Arduino-Temperature-Control-Library/tree/master
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

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

// Pin konfigurasi
#define ONE_WIRE_BUS 11
#define BUTTON_NORMAL 3
#define BUTTON_PANAS 4
#define BUTTON_DINGIN 5
#define RELAY_HEATER 6
#define RELAY_COOLER 7

// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);

// arrays to hold device address
DeviceAddress sensor;

// Variabel kontrol suhu
float suhu;
String jenis_suhu;
int setpoint = 25;

void setup() {
Serial.begin(9600);
  Serial.println("Dallas Temperature IC Control Library Demo");

  // locate devices on the bus
  Serial.print("Mencari sensor DS18B20...");
  sensors.begin();
  Serial.print("Ditemukan ");
  Serial.print(sensors.getDeviceCount(), DEC);
  Serial.println(" perangkat.");

  // report parasite power requirements
  Serial.print("Parasite power : ");
  if (sensors.isParasitePowerMode()) Serial.println("ON");
  else Serial.println("OFF");

  if (!sensors.getAddress(sensor, 0)) Serial.println("Tidak dapat menemukan sensor DS18B20");

  //atur resolusi suhu DS18B20 dengan resolusi 9-12 bit
  sensors.setResolution(sensor, 12); //kita gunakan 12 bit untuk mendapatkan presisi yang paling baik

  pinMode(BUTTON_NORMAL, INPUT_PULLUP);
  pinMode(BUTTON_PANAS, INPUT_PULLUP);
  pinMode(BUTTON_DINGIN, INPUT_PULLUP);
  pinMode(RELAY_HEATER, OUTPUT);
  pinMode(RELAY_COOLER, OUTPUT);
  
  lcd.begin(20, 4);
  lcd.backlight();
}

void loop() {
   //Ambil data suhu
  sensors.requestTemperatures(); // Send the command to get temperatures
  float suhu = sensors.getTempC(sensor);

  // Menentukan jenis suhu
  if (suhu >= 0 && suhu <= 15) {
    jenis_suhu = "Dingin";
  } else if (suhu >= 15 && suhu <= 20) {
    jenis_suhu = "Parsial";
  } else if (suhu >= 20 && suhu <= 30) {
    jenis_suhu = "Normal";
  } else if (suhu >= 30 && suhu <= 50) {
    jenis_suhu = "Parsial";
  } else if (suhu >= 50 && suhu <= 90) {
    jenis_suhu = "Panas";
  }
  
  // Menyesuaikan setpoint berdasarkan tombol yang ditekan
  if (digitalRead(BUTTON_NORMAL) == LOW) {
    setpoint = 25;
  } else if (digitalRead(BUTTON_PANAS) == LOW) {
    setpoint = 60;
  } else if (digitalRead(BUTTON_DINGIN) == LOW) {
    setpoint = 5;
  }
  
  // Tampilkan suhu dan jenis suhu pada LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Suhu: ");
  lcd.print(suhu);
  lcd.print(" C");
  lcd.setCursor(0, 1);
  lcd.print("J.Suhu: ");
  lcd.print(jenis_suhu);
  lcd.setCursor(0, 2);
  lcd.print("Setpoint: ");
  lcd.print(setpoint);
  lcd.print(" C");

  // Implementasi kontrol Heater & Cooler
  if (suhu < setpoint - 2) {
    digitalWrite(RELAY_HEATER, HIGH);
    digitalWrite(RELAY_COOLER, LOW);
  } else if (suhu > setpoint + 2) {
    digitalWrite(RELAY_COOLER, HIGH);
    digitalWrite(RELAY_HEATER, LOW);
  } else {
    digitalWrite(RELAY_HEATER, LOW);
    digitalWrite(RELAY_COOLER, LOW);
  }
  
  delay(1000);
}