Arduino I2C LCD 20x4 lines Display

這來試試 LCD 20x4 lines, 利用Arduino加上 IO Board 接線方便許多!
可顯示的字元比 常用LCD 16x2 lines 多許多!

步驟一: 下載 I2C LCD library, 解壓縮後放入Arduino Libraries內

步驟二:  撰寫程式如下:

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

// set the LCD address to 0x20 for a 20 chars 4 line display

LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);  // Set the LCD I2C address
//假設 I2C address 0x27

void setup()   /*----( SETUP: RUNS ONCE )----*/
{
  Serial.begin(9600);  /

  lcd.begin(20,4);  
  for(int i = 0; i< 3; i++)
  {
    lcd.backlight();
    delay(250);
    lcd.noBacklight();
    delay(250);
  }
  lcd.backlight();

  lcd.setCursor(3,0); //Start at character 4 on line 0
  lcd.print("Motoduino Lab!");
  lcd.setCursor(2,1);
  lcd.print("www.motoduino.com");
  lcd.setCursor(0,2);
  lcd.print("20x4 LCD Display");
  lcd.setCursor(0,3);
  lcd.print("I2C Interface");

}/*--(end setup )---*/


void loop()
{

}