char ch;
void setup()
{
  Serial.begin(9600);
  Serial.println("press any key ");
}

void loop()
{
  if (Serial.available())
  {
    ch = Serial.read();
    if (ch != '\n')
    {
      Serial.print("Ascii code in decimal: ");
      Serial.println(ch, DEC);
      Serial.print("Ascii code in hexa: ");
      Serial.println(ch, HEX);
      Serial.print("Ascii code in OCT : ");
      Serial.println(ch, OCT);
      Serial.print("Ascii code in BIN  : ");
      Serial.println(ch, BIN );
    }
  }
}