#include "Screen.h"


void setup() {
  initScreen();
}

void loop() {
  testScreen();
}

sketch.ino

diagram.json

#include "Screen.h"

void initScreen(){
  lcd.init();                   
  lcd.backlight();
}
void testScreen(){
  lcd.setCursor(0, 0);
  delay(1000);
  // clears the display to print new message
  lcd.clear();
  // set cursor to first column, second row
  lcd.setCursor(0,1);
  lcd.print("Hello, World!");
  delay(1000);
  lcd.clear(); 
}

Screen.cpp

#include <LiquidCrystal_I2C.h>

#ifndef Screen // include guard
#define Screen

int lcdColumns = 16;
int lcdRows = 2;
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows); 


void initScreen();
void testScreen();


#endif

Screen.h

# Wokwi Library List
# See https://docs.wokwi.com/guides/libraries

# Automatically added based on includes:
LiquidCrystal_I2C_Hangul