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

// Inisialisasi LCD I2C
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Pin konfigurasi
#define DHTPIN 2      // Pin sensor DHT22
#define DHTTYPE DHT22 // Jenis sensor DHT22
#define BUTTON_NORMAL 3
#define BUTTON_PANAS 4
#define BUTTON_DINGIN 5
#define RELAY_HEATER 6
#define RELAY_COOLER 7

// Inisialisasi sensor DHT22
DHT dht(DHTPIN, DHTTYPE);

// Variabel kontrol suhu
float suhu;
int setpoint = 20;  // Default suhu normal 20°C

void setup() {
  pinMode(BUTTON_NORMAL, INPUT_PULLUP);
  pinMode(BUTTON_PANAS, INPUT_PULLUP);
  pinMode(BUTTON_DINGIN, INPUT_PULLUP);
  pinMode(RELAY_HEATER, OUTPUT);
  pinMode(RELAY_COOLER, OUTPUT);
  
 lcd.init();
  lcd.clear();
  lcd.backlight();
  dht.begin();
  Serial.begin(9600);
}

void loop() {
  // Membaca input tombol
  if (digitalRead(BUTTON_NORMAL) == LOW) {
    setpoint = 20;
  } else if (digitalRead(BUTTON_PANAS) == LOW) {
    setpoint = 50;
  } else if (digitalRead(BUTTON_DINGIN) == LOW) {
    setpoint = 0;
  }
  
  // Membaca suhu dari DHT22
  suhu = dht.readTemperature();
  Serial.print("Suhu: ");
  Serial.print(suhu);
  Serial.println(" °C");
  Serial.print("Setpoint: ");
  Serial.print(setpoint);
  Serial.println(" °C");
  
  // Tampilkan suhu pada LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Suhu: ");
  lcd.print(suhu);
  lcd.print(" C");
  lcd.setCursor(0, 1);
  lcd.print("Setpoint: ");
  lcd.print(setpoint);
  lcd.print(" C");

  // Implementasi Fuzzy Logic sederhana
  float heaterOutput = fuzzyHeater(suhu, setpoint);
  float coolerOutput = fuzzyCooler(suhu, setpoint);
  
  // Matikan heater dan cooler jika suhu mendekati setpoint
  if (abs(suhu - setpoint) <= 1) {
    heaterOutput = 0;
    coolerOutput = 0;
  }

  // Mengontrol Heater
  digitalWrite(RELAY_HEATER, heaterOutput > 0 ? HIGH : LOW);
  
  // Mengontrol Cooler
  digitalWrite(RELAY_COOLER, coolerOutput > 0 ? HIGH : LOW);
  
  // Menampilkan status kontrol pada Serial Monitor
  Serial.print("Heater: ");
  Serial.println(heaterOutput > 0 ? "ON" : "OFF");
  Serial.print("Cooler: ");
  Serial.println(coolerOutput > 0 ? "ON" : "OFF");

  delay(1000);
}

// Fuzzy Logic untuk Heater
float fuzzyHeater(float suhu, int setpoint) {
  if (suhu >= 0 && suhu <= 15) {
    return 1.0;  // Heater menyala penuh
  } else if (suhu >= 16 && suhu <= 19) {
    return 0.5;  // Heater setengah daya
  } else if (suhu >= 20 && suhu <= 30) {
    return 0.0;  // Heater mati
  } else if (suhu >= 31 && suhu <= 49) {
    return 0.5;  // Heater setengah daya
  } else if (suhu >= 50 && suhu <= 90) {
    return 1.0;  // Heater menyala penuh
  } else {
    return 0.0;
  }
}

// Fuzzy Logic untuk Cooler
float fuzzyCooler(float suhu, int setpoint) {
  if (suhu >= 50 && suhu <= 90) {
    return 1.0;  // Cooler menyala penuh
  } else if (suhu >= 31 && suhu <= 49) {
    return 0.5;  // Cooler setengah daya
  } else if (suhu >= 20 && suhu <= 30) {
    return 0.0;  // Cooler mati
  } else if (suhu >= 16 && suhu <= 19) {
    return 0.5;  // Cooler setengah daya
  } else if (suhu >= 0 && suhu <= 15) {
    return 1.0;  // Cooler menyala penuh
  } else {
    return 0.0;
  }
}