// 16DTK22F1002 , 16DTK22F1006, 16DTK22F1007
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define MOTION_SENSOR_PIN 2 

int motion_state = LOW;
int prev_motion_state = LOW;

// Set the LCD address to 0x27 (or 0x3F depending on your display) for a 20x4 display
LiquidCrystal_I2C lcd(0x27, 20, 4);

void setup() 
{
  Serial.begin(9600);
  pinMode(MOTION_SENSOR_PIN, INPUT);
  
  // Initialize the LCD with columns and rows
  lcd.begin(20, 4);
  lcd.backlight();  // Turn on the backlight
  lcd.clear();  // Clear the display
  lcd.setCursor(0, 0);
  lcd.print("Motion Sensor Ready");
}

void loop() {
  prev_motion_state = motion_state;
  motion_state = digitalRead(MOTION_SENSOR_PIN);

  if (prev_motion_state == LOW && motion_state == HIGH ) {
    Serial.println("Motion detected!");
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Motion detected!");
  }
  else if (prev_motion_state == HIGH && motion_state == LOW) { 
    Serial.println("Motion Stopped!");
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Motion Stopped!");
  }
}