Arduino LCD KeyPad Shield /* Analog 0Button (select, up, right, down and left) Digital 4DB4 Digital 5DB5 Digital 6DB6 Digital 7DB7 Digital 8RS (Data or Signal Display Selection) Digital 9Enable Digital 10Backlit Control */ // select the pins used on the LCD panel LiquidCrystal lcd(8, 9, 4, 5, 6, 7);