//Add Header
#include <WiFi.h>
#include <DHT.h>
#include <LiquidCrystal_I2C.h>    //ex
#include <Adafruit_LiquidCrystal.h>
#include <Keypad.h>
//DHT
#define DHTPIN 4
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
//LED
#define REDPIN 2
#define YELPIN 14
#define GREPIN 27
//PIR(Motion)
#define PIRPIN 12
//Buzzer
#define BUZPIN 5
//LCD
Adafruit_LiquidCrystal lcd(0);
LiquidCrystal_I2C lcd2(0x27, 16, 2);   //ex

//Keypad Setting
const byte ROWS = 4;
const byte COLS = 4;
char keys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

byte rowpins[ROWS] = {16, 17, 18, 19};
byte colpins[COLS] = {25, 26, 32, 33};
Keypad keypad = Keypad(makeKeymap(keys), rowpins, colpins, ROWS, COLS);
//Password Setting
const String secretNum = "0712";
String inputNum = "";

void setup() {
  Serial.begin(115200);
  dht.begin();
  //Initialize LED Pins
  pinMode(REDPIN, OUTPUT);
  pinMode(YELPIN, OUTPUT);
  pinMode(GREPIN, OUTPUT); 
  //Initialize PIR
  pinMode(PIRPIN, INPUT);
  //Initialize Buzzer
  pinMode(BUZPIN, OUTPUT);
  //Initialize LCD
  lcd.begin(16, 2);
  lcd.setBacklight(LOW);
  //Initialize LCD2
  lcd2.begin(0);
  lcd2.backlight();      //ex
  //Initialize Display
  lcd.setCursor(0, 0);
  lcd.print("System Ready.");
}
void loop() {
  float t = dht.readTemperature();
  float h = dht.readHumidity();
  if(isnan(t) || isnan(h)) {
    Serial.println("Failed to read DHT sensor.");
    return;
  }
  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.print("*C /");
  Serial.print(" Humidity: ");
  Serial.print(h);
  Serial.println("%");
  //Control LED
  if(t >= 35 && h >= 70) {
    digitalWrite(REDPIN, HIGH);
    digitalWrite(YELPIN, LOW);
    digitalWrite(GREPIN, LOW);
  } else if(t >=27 && h >= 50) {
    digitalWrite(REDPIN, LOW);
    digitalWrite(YELPIN, HIGH);
    digitalWrite(GREPIN, LOW);
  } else {
    digitalWrite(REDPIN, LOW);
    digitalWrite(YELPIN, LOW);
    digitalWrite(GREPIN, HIGH);
  }
  //When a person is detected
  int priState = digitalRead(PIRPIN);
  
  lcd.clear();
  if(priState == HIGH) {
    lcd.setCursor(0, 0);
    lcd.print("Person detected.");
    Serial.println("Person detected.");
  } else {
    lcd.setCursor(0, 0);
    lcd.print("No Person Detected.");
    Serial.println("No Person Detected.");
  }
  //Keypad
  char key = keypad.getKey();
  if(key) {
    inputNum += key;
    Serial.println(inputNum);
  } 
  //If the number entered on the keypad is correct or incorrect
  if(inputNum.length() == secretNum.length()) {
    if(inputNum == secretNum) {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Door is open.");
      Serial.println("Door is open.");
      digitalWrite(BUZPIN, HIGH);
      delay(1000);
      digitalWrite(BUZPIN, LOW);
    } else {
      inputNum ="";
      lcd.print("Door is Close.");
      Serial.println("Door is Close.");
      delay(1000);
    }
  }
  delay(2000);
}