Arduino Code For Wireless Notice Board

 #include <LiquidCrystal.h>

LiquidCrystal lcd(2, 3, 4, 5, 6, 7);

char str;

int a=9;

int vo=10;

void setup() {

 lcd.begin(16,2);

Serial.begin(9600);

}

void loop() {

  analogWrite(a,700);

  analogWrite(vo,122);

  while(Serial.available())

  {

str = Serial.read();

if(str=='#')

{

 lcd.clear();

 delay(5);

}

else if(str=='*')

{

  lcd.setCursor(0, 1);

}

else if(str=='%')

{

  while(str!='!')

  {

    str=Serial.read();

 lcd.scrollDisplayLeft();

 delay(1000);

}

}

 else

 {

 lcd.print(str);

 delay(100);

}

}

}