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

#define DHTPIN 2 // Pin data sensor DHT11
#define DHTTYPE DHT11 // Tipe sensor DHT11
#define BUZZER_PIN 3 // Pin untuk Buzzer

const int buzzerThreshold = 30; // Threshold suhu dalam derajat Celsius
const int defaultTemperature = 30; // Suhu default
const int defaultHumidity = 50; // Kelembaban default

DHT dht(DHTPIN, DHTTYPE);

const byte ROWS = 4; // Jumlah baris keypad
const byte COLS = 4; // Jumlah kolom keypad
char keys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte rowPins[ROWS] = {13, 12, 11, 10}; // Pin baris keypad
byte colPins[COLS] = {9, 8, 7, 6}; // Pin kolom keypad

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

LiquidCrystal_I2C lcd(0x27, 16, 2); // Address LCD I2C, Jumlah Kolom, Jumlah Baris

int currentTemperature = defaultTemperature;
int currentHumidity = defaultHumidity;

void setup() {
  lcd.init(); // Inisialisasi LCD
  lcd.backlight(); // Nyalakan backlight
  
  lcd.print("Temp: ");
  lcd.setCursor(0, 1);
  lcd.print("Humid: ");
  
  pinMode(BUZZER_PIN, OUTPUT);
  
  dht.begin();
}

void loop() {
  char key = keypad.getKey();
  
  if (key) {
    if (key == 'A') {
      // Masukkan fungsi untuk menyetel suhu manual
      setTemperature();
    } else if (key == 'B') {
      // Masukkan fungsi untuk menyetel kelembaban manual
      setHumidity();
    }
  }
  
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  if (isnan(temperature) || isnan(humidity)) {
    lcd.setCursor(6, 0);
    lcd.print("Error");
  } else {
    lcd.setCursor(6, 0);
    lcd.print(temperature);
    lcd.print(" C");

    lcd.setCursor(7, 1);
    lcd.print(humidity);
    lcd.print(" %");

    if (temperature > buzzerThreshold || humidity > buzzerThreshold) {
      digitalWrite(BUZZER_PIN, HIGH); // Aktifkan Buzzer
    } else {
      digitalWrite(BUZZER_PIN, LOW); // Matikan Buzzer
    }
  }

  delay(1000);
}

void setTemperature() {
  lcd.clear();
  lcd.print("Set Temp: ");
  while (true) {
    char key = keypad.getKey();
    if (key) {
      if (key == '#') {
        break;
      } else if (isdigit(key)) {
        currentTemperature = (currentTemperature * 10) + (key - '0');
        lcd.setCursor(10, 0);
        lcd.print(currentTemperature);
      }
    }
  }
  lcd.clear();
  lcd.print("Temp Set");
  delay(1000);
}

void setHumidity() {
  lcd.clear();
  lcd.print("Set Humid: ");
  while (true) {
    char key = keypad.getKey();
    if (key) {
      if (key == '#') {
        break;
      } else if (isdigit(key)) {
        currentHumidity = (currentHumidity * 10) + (key - '0');
        lcd.setCursor(11, 1);
        lcd.print(currentHumidity);
      }
    }
  }
  lcd.clear();
  lcd.print("Humid Set");
  delay(1000);
}