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

const byte rxPin=A1;
const byte txPin=A2;
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]={13,12,11,10};
byte colPins[COLS]={9,8,7,6};
Keypad keypad=Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
//const int rs=7, en=6, d4=5, d5=4, d6=3, d7=2;
LiquidCrystal lcd(7,6,5,4,3,2);
SoftwareSerial mySerial(rxPin, txPin);

bool dataEntered = true;

void setup()
 {
  char key;
  lcd.begin(16, 2); 
  lcd.clear();
  lcd.print("Enter a key:");
  mySerial.begin(9600);
}
void loop() {
  char key = keypad.getKey();
  if (key !=NO_KEY) {
    //lcd.clear();
    lcd.setCursor(0,1);
    lcd.print(key);
    
    if (key=='D') 
       {
      if(dataEntered)
      {
        sendDataForKey();
        if(key=='c')
        {
         lcd.clear();
         lcd.print("Enter a key");
        }
      }
      
    }
  }
}


void sendDataForKey() 
//first commom set
{
  mySerial.print(A5,HEX);
  mySerial.print(A5,HEX);
  mySerial.print(A5,HEX);
  mySerial.print(A5,HEX);
  mySerial.print(A5,HEX);
  mySerial.print(A5,HEX);
  mySerial.print(A5,HEX);
  mySerial.print(A5,HEX);
  mySerial.print(01,HEX);
  mySerial.print(00,HEX);
  mySerial.print(00,HEX);
  mySerial.print(80,HEX);
  mySerial.print(05,HEX);
  mySerial.print(00,HEX);
  mySerial.print(0xFE,HEX);
  mySerial.print(0xFF,HEX);
  mySerial.print(01,HEX);
  mySerial.print(00,HEX);
  mySerial.print(00,HEX);
  mySerial.print(00,HEX);
  mySerial.print(00,HEX);
  mySerial.print(84,HEX);
  mySerial.print(96,HEX);
  mySerial.print(00,HEX);
  mySerial.print(00,HEX);
  mySerial.print(00,HEX);
  mySerial.print(00,HEX);
  mySerial.print(00,HEX);
  mySerial.print(00,HEX);
  mySerial.print(00,HEX);


  if(keys=='1') 
  {
    mySerial.print(85,HEX);
    mySerial.print(0xCA,HEX);
    mySerial.print(0xD6,HEX);
  } 
  else if(keys=='2') 
  {
    mySerial.print(0xB8,HEX);
    mySerial.print(0x0A,HEX);
    mySerial.print(0x2B,HEX);
  }
   else if(keys=='3') 
  {
    mySerial.print(0xFC,HEX);
    mySerial.print(0x0A,HEX);
    mySerial.print(0x6F,HEX);
  } 
  else if (keys=='4') 
  {
    mySerial.print(0xC1,HEX);
    mySerial.print(0xCA,HEX);
    mySerial.print(92,HEX); 
  } 
  else if(keys=='5') 
  {
    mySerial.print(74,HEX);
    mySerial.print(0x0A,HEX);
    mySerial.print(0xE7,HEX);
  } 
  else if(keys=='6') 
  {
   mySerial.print(49,HEX);
   mySerial.print(0xCA,HEX);
   mySerial.print(0x1A,HEX);
  } 
  else if(keys=='7') 
  {
    mySerial.print(0x0D,HEX);
    mySerial.print(0xCA,HEX);
    mySerial.print(0x5E,HEX);
  } 
  else if (keys=='8') 
  {
    mySerial.print(30,HEX);
    mySerial.print(0x0A,HEX);
    mySerial.print(A3,HEX);
  } 
  else if(keys=='9') 
  {
    mySerial.print(64,HEX);
    mySerial.print(0x0B,HEX);
    mySerial.print(0xF6,HEX);
  }
   //second commom set
   mySerial.print(01,HEX);
   mySerial.print(A2,HEX);
   mySerial.print(0x0E,HEX);
   mySerial.print(0x0A,HEX);
   mySerial.print(00,HEX);
   mySerial.print(01,HEX);
   mySerial.print(01,HEX);
   mySerial.print(50,HEX);
   mySerial.print(30,HEX);
   mySerial.print(30,HEX);

   
  if(keys=='1') 
  {
    mySerial.print(30,HEX);
  } 
  else if(keys=='2') 
  {
    mySerial.print(31,HEX);
  } 
  else if(keys=='3') 
  {
    mySerial.print(32,HEX);
  } 
  else if(keys=='4')
  {
    mySerial.print(33,HEX); 
  } 
  else if(keys=='5') 
  {
    mySerial.print(34,HEX);
  } 
  else if(keys=='6') 
  {
    mySerial.print(35,HEX);
  } 
  else if(keys=='7') 
  {
    mySerial.print(36,HEX);
  } 
  else if(keys=='8') 
  {
    mySerial.print(37,HEX);
  }
   else if(keys=='9') 
  {
    mySerial.print(38,HEX);
  }
  //third common set
    mySerial.print(0xE8,HEX);
    mySerial.print(03,HEX);
    mySerial.print(00,HEX);
    mySerial.print(00,HEX);
}