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

LiquidCrystal_I2C lcd(0x27, 16, 2); // Alamat I2C LCD
OneWire oneWire(4); // Pin data DS18B20
DallasTemperature sensors(&oneWire);
DeviceAddress sensorDeviceAddress;

#define RELAY1_PIN 25
#define RELAY2_PIN 26
#define RELAY3_PIN 27
#define RELAY4_PIN 14

#define LED1_PIN 18
#define LED2_PIN 19

void setup() {
  Serial.begin(115200);
  Wire.begin();

  lcd.init();//inisialisasi lcd
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Suhu:");
  lcd.setCursor(12, 0);
  lcd.print("C");
  
  pinMode(RELAY1_PIN, OUTPUT);
  pinMode(RELAY2_PIN, OUTPUT);
  pinMode(RELAY3_PIN, OUTPUT);
  pinMode(RELAY4_PIN, OUTPUT);

  digitalWrite(RELAY1_PIN, LOW);
  digitalWrite(RELAY2_PIN, LOW);
  digitalWrite(RELAY3_PIN, LOW);
  digitalWrite(RELAY4_PIN, LOW);

  pinMode(LED1_PIN, OUTPUT);
  pinMode(LED2_PIN, OUTPUT);

  sensors.begin();
  sensors.getAddress(sensorDeviceAddress, 0);
  sensors.setResolution(sensorDeviceAddress, 12); // Resolusi suhu 12-bit (maksimum)
}

void loop() {
  sensors.requestTemperatures();
  float temperature = sensors.getTempCByIndex(0);

  String status = evaluateTemperature(temperature);

  updateLCD(temperature, status);
  controlRelays(temperature);
  controlLEDs();
}

String evaluateTemperature(float temperature) {
  if (temperature < 26.0) {
    return "SUHU SANGAT BAGUS";
  } else if (temperature >= 27.0 && temperature <= 29.0) {
    return "SUHU CUKUP BAGUS";
  } else if (temperature >= 30.0 && temperature <= 32.0) {
    return "SUHU MASIH BAGUS";
  } else {
    return "SUHU TIDAK BAGUS";
  }
}

void updateLCD(float temperature, String status) {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Suhu: ");
  lcd.print(temperature, 1);
  lcd.print("C");
  lcd.setCursor(0, 1);
  lcd.print(status);
}

void controlRelays(float temperature) {
  if (temperature < 26.0) {
    digitalWrite(RELAY1_PIN, HIGH);
    digitalWrite(RELAY2_PIN, LOW);
    delay(5000);
    digitalWrite(RELAY3_PIN, HIGH);
    delay(5000);
    digitalWrite(RELAY3_PIN, LOW);
    digitalWrite(RELAY4_PIN, LOW);
  } else if (temperature > 32.0) {
    digitalWrite(RELAY1_PIN, LOW);
    digitalWrite(RELAY2_PIN, HIGH);
    delay(5000);
    digitalWrite(RELAY3_PIN, HIGH);
    delay(5000);
    digitalWrite(RELAY3_PIN, LOW);
    digitalWrite(RELAY4_PIN, LOW);
  } else {
    digitalWrite(RELAY1_PIN, LOW);
    digitalWrite(RELAY2_PIN, LOW);
    digitalWrite(RELAY3_PIN, LOW);
    digitalWrite(RELAY4_PIN, LOW);
  }
}

void controlLEDs() {
  digitalWrite(LED1_PIN, HIGH);
  digitalWrite(LED2_PIN, HIGH);
}