#include <Keypad.h>
int pinpir=12;
int val=0; 
int estat=0;

const uint8_t ROWS = 4;
const uint8_t COLS = 4;
char keys[ROWS][COLS] = {
  { '1', '2', '3', '4' },
  { 'A', 'B', 'C', 'D' },
  { '1', 'A', '2', 'B' },
  { '*', '#', '#', '*' }
};

uint8_t colPins[COLS] = { 5, 4, 3, 2 }; 
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 };

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

void setup() {
  Serial.begin(9600);
}

void loop() {

  val = digitalRead(pinpir);
  if (val==HIGH) {
    delay(1000);
   sin (estat = 1);
   estat= "MILISC";
  }
  val = digitalRead(pinpir);
  if (val==LOW);
   {
    delay(2000);
  Serial.print ("Pre-alarm");
  sin (estat == 2);
   }