#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
#include <Encoder.h>

LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 20 chars and 4 line display
Encoder myEnc(2, 3);
long oldPosition  = -999; 
int buttonPin = 4; // button input pin
int buttonState = 0; // variable to hold button state

// Menu Items
const char* menuItems[] = {"Option 1", "Option 2", "Option 3"};
int currentMenuItem = 0; // current selected menu item

void setup()
{
  lcd.init();                      // initialize the lcd 
  lcd.backlight(); // turn on backlight
  pinMode(buttonPin, INPUT); // set the button pin as input
}

void loop()
{
  long newPosition = myEnc.read()/4;
  if (newPosition != oldPosition) {
    oldPosition = newPosition;
    currentMenuItem = constrain(newPosition, 0, 2); // limit menu item selection between 0-2
    lcd.clear();
    lcd.setCursor(0,0); // go to the top left corner
    lcd.print(menuItems[currentMenuItem]); // print the current menu item
  }

  buttonState = digitalRead(buttonPin); // read the button state

  if (buttonState == HIGH) { // if button is pressed
    lcd.setCursor(0,1); // go to the second line
    lcd.print("Selected: ");
    lcd.print(menuItems[currentMenuItem]); // print the selected menu item
  }
}