Arduino Mini Motion Sensor with LCD

PIR_LCD.ino

//Compatible with the Arduino IDE 1.0
//Library version:1.1
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

// Connection details for LCD:
// SDA --> A4
// SCL --> A5
// VCC --> 5V 
// lcd is initialized with 
//   IC2C slave address: 0x27
//   Columns: 20
//   Rows: 2
//   (optional) CharSize: LCD_5x8DOTS (default) or LCD5x10DOTS
LiquidCrystal_I2C lcd(0x27,20,2); 

// Connection details for PIR:
// OUT --> D2
// VCC --> 5V 
int pir = 2; 

// Initial state
int state = LOW;

// Holds the state of the PIR (0 or 1)
int val = 0;

void setup()
{
  lcd.init();
  pinMode(pir, INPUT);
}

void loop()
{
  val = digitalRead(pir);
  if (val == HIGH) {
    delay(100);
    if (state == LOW) {
      showMessage("Motion Detected!");
      state = HIGH;
    }
  } else {
    delay(200);
    if (state == HIGH) {
      hideMessage();
      state = LOW;
    }
  }
}

void showMessage(char message[]) {
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print(message);
}

void hideMessage() {
  lcd.clear();
  lcd.noBacklight();
}