IIC_LCD1602_display_module_Gadgeteer_Compatible___SKU_TOY0046_ - jimaobian/DFRobotWikiCn GitHub Wiki

//DFRobot.com
//Compatible with the Arduino IDE 1.0
//Library version:1.1


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

#if defined(ARDUINO) && ARDUINO >= 100
#define printByte(args)  write(args);
#else
#define printByte(args)  print(args,BYTE);
#endif

LiquidCrystal_I2C lcd(0x20,16,2);  // set the LCD address to 0x27 for a 16 chars and 2 line display

void setup(){

  lcd.init();                      // initialize the lcd
  lcd.backlight();

  lcd.home();

  lcd.print("Hello world...");
  lcd.setCursor(0, 1);
  lcd.print("dfrobot.com");

}

int backlightState = LOW;
long previousMillis = 0;
long interval = 1000;

void loop(){

  unsigned long currentMillis = millis();

  if(currentMillis - previousMillis > interval) {
    previousMillis = currentMillis;

    if (backlightState == LOW)
      backlightState = HIGH;
    else
      backlightState = LOW;

    if(backlightState == HIGH)  lcd.backlight();
    else lcd.noBacklight();
  }
}