#include <LiquidCrystal.h>
#include <SoftwareSerial.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);//RS, EN, D4, D5, D6, D7

SoftwareSerial bt(10, 9); // TX,RX OF HC05


#define fan 8
#define light 7
#define out1 A1
# define out2 A2

int buzzer = 6;

int light_sensor_Pin = 0;// analog 0 for light sensor
int password[4] = {1,2,3,4};//correct password
int input;
int check = 0 ;
char command[1];// for light and fan  L,l for light and F,f for fan 


int ilight; // intensity of ight from sensor

int correct,wrong;// inputs from the helium board

void setup() {
  Serial.begin(9600);
  lcd.begin(16, 2);
  lcd.print("Locking the ");
  lcd.setCursor(0,1);
  lcd.print("Doors ");
  delay(1500);
  lcd.clear();
  lcd.print("Connecting with");
  lcd.setCursor(0,1);
  lcd.print("Appliances");
  delay(1000);
  lcd.clear();
  lcd.print("Securing the");
  lcd.setCursor(0,1);
  lcd.print("Mansion....");
  delay(1500);
   Serial.begin(9600);
  Serial.println("\n Bluetooth Module two-way communication with Phone or PC begins...");

pinMode(light_sensor_Pin, INPUT);
pinMode(out2, INPUT);
pinMode(out1, INPUT);
pinMode(fan, OUTPUT); 
pinMode(light, OUTPUT);
pinMode(buzzer,OUTPUT);
  digitalWrite(fan, HIGH);
  digitalWrite(light, LOW);
  digitalWrite(buzzer, LOW);
  bt.begin(9600);
 // delay(1000);
  
  bt.println("\nHello Bluetooth Device! /nThis is Home automation system calling via Bluetooth.");
  bt.println("Send the password for access");
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Enter Password");
 delay(1000);
}
void loop() 
{
//-----------------checking the outputs from the helium board---------
correct = digitalRead(out1);
wrong   = digitalRead(out2);
if (wrong = LOW) check = 2;
if(correct = LOW) {check = 5;Serial.println("hi");}
//if (wrong = HIGH) check = 2;

//---------------checking the amount of light in the room-----------
ilight = analogRead(light_sensor_Pin);
if( ilight >= 450)
{
  lcd.setCursor(0,1);
  lcd.print("Low Light");
  delay(1000);
bt.println("/nTheir is not enough light in the room.");
}


//-----------------if password entered is correct--------------------
 if ( check == 5 )
 {
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Access Granted!");
  
    delay(200);
  {
    command[0] = bt.read();
  }
  lcd.setCursor(0,1);
  lcd.print(command[0]);
  if(command[0] == 'f')digitalWrite(fan,HIGH);
  if(command[0] == 'l') digitalWrite(light,HIGH);
  if(command[0] == 'F')digitalWrite(fan,LOW);
  if(command[0] == 'L') digitalWrite(light,LOW);
  delay(1000);
  lcd.clear();
  
 }
//---------------if wrong password is entered------------------------ 
else if ( check == 2 )
{check = 1;
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Wrong Password");
  lcd.setCursor(0,1);
  lcd.print("Enter Again");
  digitalWrite(buzzer,HIGH);
  delay(500);
  digitalWrite(buzzer,LOW);
if(bt.available()) 
 { if(password[0] == bt.read()-48)    //for checking the ascii values we subtract 48
      if(password[1]==bt.read()-48)
        if(password[2]==bt.read()-48)
          if(password[3]==bt.read()-48)
                check=5;            
 }
else if (check = 1); 
{
if(bt.available()) 
 { if(password[0] == bt.read()-48)    //for checking the ascii values we subtract 48
      if(password[1]==bt.read()-48)
        if(password[2]==bt.read()-48)
          if(password[3]==bt.read()-48)
                check=5;            
 }  
}  
}
//-----------------------asking for password for the first time----------
else if (bt.available()) 
  {
  input = bt.read();
  lcd.clear();
  if(password[0] ==  input-48)
      if(password[1] == bt.read()-48)
        if(password[2] == bt.read()-48)
      if(password[3] == bt.read()-48)
      {
        check=5;
      }
  
    
else {check = 2;}
else {check = 2;}
else {check = 2;}
else {check = 2;}
 
  }
}