Arduino 16x2 LCD

The official Arduino Starter Kit includes, among other things, a 15x2 Liquid Crystal Display (LCD) that can be used to show simple text output.

Wiring the Arduino 16x2 LCD

The Contrast pin (labeled VO) can be wired into a potentiometer for contrast control, or directly into the 5V rail which will maximize the contrast and may make the display difficult to read.

"Hello World" with Arduino 16x2 LCD and LiquidCrystal

#include <LiquidCrystal.h>

// LCD Configuration
const int
	LCD_PIN_RS = 11,
	LCD_PIN_EN = 12,
	LCD_PIN_D4 = 2,
	LCD_PIN_D5 = 3,
	LCD_PIN_D6 = 4,
	LCD_PIN_D7 = 5;

LiquidCrystal lcd(LCD_PIN_RS, LCD_PIN_EN, LCD_PIN_D4, LCD_PIN_D5, LCD_PIN_D6, LCD_PIN_D7);

void setup() {
  lcd.begin(16, 2);
  lcd.setCursor(0, 0);
  lcd.print("Hello World!");
}

void loop() {
  // Do nothing
}

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