Arduino-Tutorials/LCD Scroll at master · SamStans/Arduino-Tutorials · GitHub

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/* Setting up the LCD to the arduino:
 * Materials needed- LCD, potentiometer, bread board, arduino, wire, 220 ohm resistor
 * The LCD has 16 pins on it, so this little tutorial will teach you what pins to use and where to connect them to
 * (If your LCD doesn't have pre-soldered pins, you'll have to solder the wires on to there)
 * Step one- Place LCD horizontally on the horizontal bread board. Place potentiometer on the bread board, but out of the way of the LCD
 * Step two- connect LCD to bread board
 *    Pin 1- connect VSS to a ground rail on the bread board
 *    Pin 2- connect VDD to the positive rail on the bread board
 *    Pin 3- connect V0 to the middle pin of the potentiometer
 *    Pin 4- connect RS to digital pin 12(or any digital pin- does not have to be a PWM pin)
 *    Pin 5- connect RW to ground rail
 *    Pin 6- connect E to digital pin 11 (must be any PWM digital pin)
 *    Pin 16- connect K to ground rail
 *    Pin 15- connect A to the positive rail using a 220 ohm resistor
 *    Pin 14- connect D7 to digital pin 2 (or any digital pin- does not have to be a PWM pin)
 *    Pin 13- connect D6 to digital pin 3 (must be any PWM digital pin)
 *    Pin 12- connect D5 to digital pin 4 (or any digital pin- does not have to be a PWM pin)
 *    Pin 11- connect D4 to digital pin 5 (must be any PWM digital pin)
 * Step three- Connect one of the outside pins of the potentiometer to the ground rail and the other to the positive rail
 * Step four- Connect the ground rail to "GND" on your arduino and the positive rail to "5v"
 *
 * Adjusting the potentiometer will adjust the contrast of the symbols
 * If you switch the resistor with a potentiometer, that'll allow you to adjust the contrast of the backlight
 *
 * Look at this link for reference to the library: https://www.arduino.cc/en/Reference/LiquidCrystal
 */

#include <LiquidCrystal.h> /* Includes the LCD library which comes pre-loaded with the arduino software */

LiquidCrystal lcd(12, 11, 5, 4, 3, 2); /* Creates a variable of type LiquidCrystal. You can use 4 or 8 data lines. The order of the pin numbers doesn't matter: https://www.arduino.cc/en/Reference/LiquidCrystalConstructor
                                     * LiquidCrystal variableName(rs, enable, d4, d5, d6, d7); */


void setup() {

  lcd.begin(16,2); /* Initializes the interface to the LCD screen, and specifies the dimensions of the display. Must be the first thing in setup: https://www.arduino.cc/en/Reference/LiquidCrystalBegin
                    * variableName.begin(width, height); */

  lcd.print("Hello, world!"); /* Prints text to the LCD: https://www.arduino.cc/en/Reference/LiquidCrystalPrint
                               * variableName.print(data); */
  delay(500);

     // scroll 13 positions (string length) to the left
  // to move it offscreen left:
  for (int left = 0; left < 13; left++) {
    // scroll one position left:
    lcd.scrollDisplayLeft();
    // wait a bit:

  // scroll 29 positions (string length + display length) to the right
  // to move it offscreen right:
  for (int right = 0; right < 29; right++) {
    // scroll one position right:
    lcd.scrollDisplayRight();
    // wait a bit:
    delay(150);
    }
  }
}

void loop() {

  for (int left = 0; left < 13; left++) {
    lcd.scrollDisplayLeft();
    delay(500);
    if (int left >= 13);
      lcd.clear();

  }
}