"Hello World!" 跑馬燈

 #include <Wire.h>

#include <LiquidCrystal_I2C.h>

#define LCD_ADDRESS 0x27

#define LCD_COLUMNS 16

#define LCD_ROWS 2

// Initialize the LCD

LiquidCrystal_I2C lcd(LCD_ADDRESS, LCD_COLUMNS, LCD_ROWS);

void setup() {

  // Initialize the LCD

  lcd.init();

  // Turn on the backlight

  lcd.backlight();

  // Print initial message

  lcd.print("Hello World!");

}

void loop() {

  // Move "Hello World!" message to the left

  for (int i = 0; i < LCD_COLUMNS + 12; i++) { // Loop through the number of columns plus length of message

    lcd.scrollDisplayLeft(); // Scroll display left

    delay(200); // Delay for animation

  }

}