HOME ALARM SYSTEM FINAL

#include <LiquidCrystal.h>
LiquidCrystal lcd (12, 11, 10, 9, 15, 16);
bool flag = false;
const int photoPin = A0;
const int piezoPin = 8;
const int SER = 5; // serial output to shift register
const int LATCH = 6; // shift register latch pin
const int CLK = 7; //shift register clock pin
const int motionPin = 13;
int val = 0;
int pirState = LOW;
int motion = 0;

void setup()
{
  pinMode (piezoPin, OUTPUT);
  pinMode (SER, OUTPUT);
  pinMode (LATCH, OUTPUT);
  pinMode (CLK, OUTPUT);
  digitalWrite (LATCH, LOW);
  shiftOut(SER, CLK, MSBFIRST, B00000000);
  digitalWrite (LATCH, HIGH);
  delay  (500);

  lcd.begin (16,2);
  lcd.print ( "Greetings" );
  lcd.setCursor (3,1);
  lcd.print ( "FAMILY");
  Serial.begin (9600);
  tone(piezoPin, 700);
  delay(30);
  noTone(piezoPin);


}

void loop()
{
    val = digitalRead(motionPin);
  if (val == HIGH)
  {            // check if the input is HIGH
          digitalWrite (LATCH, LOW);
      shiftOut(SER, CLK, MSBFIRST, B11111111);
      digitalWrite (LATCH, HIGH);
      tone(piezoPin, 700);
      delay(500);
      noTone(piezoPin);
lcd.clear();
      // we have just turned on
      lcd.println("Motion detected!");

      delay (500);
      // We only want to print on the output change, not state
      pirState = HIGH;

  }
  if (pirState == HIGH)
  {
          digitalWrite (LATCH, LOW);
      shiftOut(SER, CLK, MSBFIRST, B00000000);
      digitalWrite (LATCH, HIGH);
   lcd.clear();
      // we have just turned of
      lcd.println("Motion ended!");
      // We only want to print on the output change, not state
      pirState = LOW;
      delay (2000);
    }


}