#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
#include <Servo.h>

//lcd parámetros
#define I2C_ADDR 0x27
#define LCD_COLUMNS 20
#define LCD_LINES 4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES); 

char pass[1][4]{
{'1', '2', '3', 'A'}
};
//Servo
Servo ser;
//Keypad
const byte lineas = 4;
const byte columnas = 4; 

byte PinColumna[columnas] = {A0,A1,A2,A3};
byte PinLineas[lineas] = {7,6,5,4};

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

Keypad keypad = Keypad(makeKeymap(keys),PinLineas,PinColumna,lineas,columnas );


void setup(){
lcd.init();
lcd.backlight();
lcd.clear();
ser.attach(11);
close();
}

void loop() {
char key = keypad.getKey();
}

void open(){
  ser.write(90);
}
void close(){
  ser.write(0);
}