Arduino Goodness

// include the library code:
#include <LiquidCrystal.h>
#include <WString.h>

 // initialize the library with the numbers of the interface pins
 LiquidCrystal lcd(2, 3, 4, 9, 10, 11, 12);

 void setup(){
    // set up the LCD's number of rows and columns:
  analogWrite(5, 100);
  lcd.begin(16, 2);
  // initialize the serial communications:
  Serial.begin(9600);
  lcd.print("Begin.");
 }

int readserial(int a) {
  
  // Convert serial data to string
  String serstr = String(999);
  itoa(a, serstr, 10);
  
  String b = String(1);
  b = serstr.substring(0,1);

  //lcd.print(b);
  
  if (b == "2") {
    lcd.setCursor(0,1);
    lcd.print(b);
  }
  
  //lcd.print(a, BYTE);

}

 void loop()
 {
  // when characters arrive over the serial port...
  if (Serial.available()) {
    // wait a bit for the entire message to arrive
    delay(100);
    // clear the screen
    lcd.clear();
    // read all the available characters
    while (Serial.available() > 0) {

       readserial(Serial.read());

      // display each character to the LCD
      // lcd.write(Serial.read());
    }
  }
 }