Monitor serial for commands

iTunesLCD.cpp

#include <LiquidCrystal.h>

// tell the library which pins the LCD is connected on
LiquidCrystal lcd(12,11,10,5,4,3,2);

void setup()
{
    // initialize the serial port to 9600 baud (it's fast enough)
    Serial.begin(9600);
    // initialize the lcd to 16 columns, 2 rows
    lcd.begin(16,2);
    lcd.autoscroll();
}

void loop()
{
    int input = 0;
    
    // if there is data available
    if (Serial.available())
    {
      // wait a bit for it all to arrive...
      delay(100);
      
      // clear the LCD
      lcd.clear();
      
      // enter a loop until there's no data left to read
      while (Serial.available() > 0)
      {
          // read a character off the serial port
          input = Serial.read();
          switch (input)
          { 
            case 1: // if it's a 1, set the cursor position to the upper left
              lcd.setCursor(0,0);
              break;
            case 2: // if it's a 2, set the cursor position to the lower left
              lcd.setCursor(0,1);
              break;
            case 0: // if it's a 0, we're at the end of the data anyway, just break
              break;
            default: // otherwise, just print the character
              lcd.write(input);
          }
      }
    }
}