#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <ESP32Servo.h>

// --- KONFIGURASI PIN & HARDWARE ---
#define PIN_SUHU 4      // Konfigurasi: Pin Data DS18B20
#define PIN_RELAY 12    // Konfigurasi: Pin Relay (Heater)
#define PIN_SERVO 13    // Konfigurasi: Pin Data Servo
#define LCD_ADDR 0x27   // Konfigurasi: Alamat I2C LCD
#define SDA_PIN 22      // Konfigurasi: Pin SDA Custom
#define SCL_PIN 23      // Konfigurasi: Pin SCL Custom

// --- KONFIGURASI WAKTU ---
const long intervalMakan = 10000; // Konfigurasi: Interval pakan (ms)

LiquidCrystal_I2C lcd(LCD_ADDR, 16, 2);
OneWire oneWire(PIN_SUHU);
DallasTemperature sensors(&oneWire);
Servo myServo;

unsigned long previousMillis = 0;

void setup() {
  Serial.begin(115200);
  
  Wire.begin(SDA_PIN, SCL_PIN);
  
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("System Starting...");

  sensors.begin();

  myServo.setPeriodHertz(50); 
  myServo.attach(PIN_SERVO, 500, 2400); 
  myServo.write(0); 

  pinMode(PIN_RELAY, OUTPUT);
  digitalWrite(PIN_RELAY, LOW); 

  delay(2000);
  lcd.clear();
}

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

  Serial.print("Suhu Air: ");
  Serial.println(suhuAir);

  lcd.setCursor(0, 0);
  lcd.print("Suhu: ");
  lcd.print(suhuAir);
  lcd.print(" C  ");

  if (suhuAir < 25.0) {
    digitalWrite(PIN_RELAY, HIGH); 
    lcd.setCursor(0, 1);
    lcd.print("Heater: ON ");
  } else {
    digitalWrite(PIN_RELAY, LOW); 
    lcd.setCursor(0, 1);
    lcd.print("Heater: OFF");
  }

  unsigned long currentMillis = millis();
  
  if (currentMillis - previousMillis >= intervalMakan) {
    previousMillis = currentMillis;
    
    lcd.setCursor(0, 1);
    lcd.print("Feeding Time!");
    Serial.println("Feeding...");
    
    myServo.write(90); 
    delay(1000);        
    myServo.write(0);  
    
    Serial.println("Done.");
  }
  
  delay(1000); 
}