/*
  Switch statement  with serial input

  Demonstrates the use of a switch statement.  The switch
  statement allows you to choose from among a set of discrete values
  of a variable.  It's like a series of if statements.

  To see this sketch in action, open the Serial monitor and send any character.
  The characters a, b, c, d, and e, will turn on LEDs.  Any other character will turn
  the LEDs off.

  The circuit:
  * 5 LEDs attached to digital pins 2 through 6 through 220-ohm resistors

  created 1 Jul 2009
  by Tom Igoe
  modified 30 Apr 2013
  by Adrian Fernandez

  This example code is in the public domain.

 */

void setup() {
  // initialize serial communication:
  Serial.begin(9600);
  // initialize the LED pins:
  for (int thisPin = 2; thisPin < 7; thisPin++) {
    pinMode(thisPin, OUTPUT);
  }
}

void loop() {
  // read the sensor:
  if (Serial.available() > 0) {
    int inByte = Serial.read();
    // do something different depending on the character received.
    // The switch statement expects single number values for each case;
    // in this exmaple, though, you're using single quotes to tell
    // the controller to get the ASCII value for the character.  For
    // example 'a' = 97, 'b' = 98, and so forth:

    switch (inByte) {
    case 'a':
      digitalWrite(2, HIGH);
      break;
    case 'b':
      digitalWrite(3, HIGH);
      break;
    case 'c':
      digitalWrite(4, HIGH);
      break;
    case 'd':
      digitalWrite(5, HIGH);
      break;
    case 'e':
      digitalWrite(6, HIGH);
      break;
    default:
      // turn all the LEDs off:
      for (int thisPin = 2; thisPin < 7; thisPin++) {
        digitalWrite(thisPin, LOW);
      }
    }
  }
}