#include <Keypad.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#include <Wire.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);

const uint8_t x = 4;
const uint8_t y = 4;

uint8_t pinbaris [x] = {2, 3, 4, 5};
uint8_t pinkolom [y] = {6, 7, 8, 9};

char keys [x][y] = {{'1', '2', '3', 'A'},
                    {'4', '5', '6', 'B'}, 
                    {'7', '8', '9', 'C'}, 
                    {'*', '0', '#', 'D'}};

Keypad k = Keypad(makeKeymap(keys), pinbaris, pinkolom, x, y);

bool pinbenar = false;

String pinsimpan = "091001";
String pininput = "";

int dhtpin = A0;
int dhttype = DHT22;

DHT dht (dhtpin, dhttype);

void sugeng() {
  lcd.setCursor(2,0);
  lcd.print("SUGENG RAWUH");
  delay(2000);
  lcd.clear();
  lcd.setCursor(4,0);
  lcd.print("MASUKKAN");
  lcd.setCursor(0,1);
  lcd.print("PIN:");
}

void pin() {
  while (!pinbenar){
    char bacakey = k.getKey();
    if (bacakey != NO_KEY){
      Serial.print(bacakey);
      if (bacakey == 'D'){
        if (pinsimpan == pininput){
          pinbenar = true;
          Serial.println("\nBenar");
          lcd.clear();
          lcd.setCursor(1,0);
          lcd.print("LOGIN BERHASIL");
          delay(500);
          lcd.clear();
        }
        pininput = "";
      }
      else{
        pininput = pininput + bacakey;
        lcd.setCursor(5,1);
        lcd.print(pininput);
      }
    }
  }
}

void baca(){
  float t = dht.readTemperature();
  float h = dht.readHumidity();

  lcd.setCursor(0, 0);
  lcd.print("Suhu  :" + String(t) + (char)223 + "C  ");
  lcd.setCursor(0, 1);
  lcd.print("Humi  :" + String(h) + "%  ");

  Serial.println("Suhu     : " + String(t) + "°C");
  Serial.println("Humidity : " + String(h) + " %");
  Serial.println("==============");
}

void setup() {
  Serial.begin(115200);
  dht.begin();
  lcd.init();
  lcd.backlight();
  sugeng();
  pin();
}

void loop() {
  
  
  baca();
}