#include<Keypad.h>
#include<LiquidCrystal_I2C.h>
#include<string.h>
#define ledpin 15
LiquidCrystal_I2C lcd(0x27,20,4);
const byte ROW=4;   //hexadecimal
const byte COLS=4;
int pir=12;
int state=0;
int buzzer=16;
int data=0;
char datapin [5];
char keys[4][4]={
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'},
  
};
byte rowpin[ROWS]={3,4,5,6};
byte colspin[COLS]={7,8,9,10};
Keypad keypad=

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}