#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x3F,16,2);  // set the LCD address to 0x3F for a 16 chars and 2 line display
int ledPin = 13;                // choose the pin for the LED
int inputPin = 8;               // choose the input pin (for PIR sensor)
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;                    // variable for reading the pin status
  
void setup() {

  lcd.init();                      // initialize the lcd 
  lcd.backlight();
  Serial.begin(9600);
  pinMode(ledPin, OUTPUT);      // declare LED as output
  pinMode(inputPin, INPUT);     // declare sensor as input
  
  Serial.begin(9600);
}
  
void loop(){
  val = digitalRead(inputPin);  // read input value
   
  if (val == HIGH)  // check if the input is HIGH
  {            
    digitalWrite(ledPin, HIGH);  // turn LED ON
     
    if (pirState == LOW) 
    {
       delay(10);
    // clear the screen
    lcd.clear();
    // read all the available characters
   
      // display each character to the LCD
      lcd.write("Motion detected!");
      Serial.println("Motion detected!");   // print on output change
      pirState = HIGH;
    }
  } 
  else
  {
    digitalWrite(ledPin, LOW); // turn LED OFF
     
    if (pirState == HIGH)
    {
      Serial.println("Motion ended!");  // print on output change
      pirState = LOW;
    delay(10);
    // clear the screen
    lcd.clear();
    // read all the available characters
   
      // display each character to the LCD
      lcd.write("Motion ended!");
    }
  }
    
  
}