/*
  Reading a serial ASCII-encoded string.

 This sketch demonstrates the Serial parseInt() function.
 It looks for an ASCII string of comma-separated values.
 It parses them into ints, and uses those to fade an RGB LED.

 Circuit: Common-Cathode RGB LED wired like so:
 * Red anode: digital pin 3
 * Green anode: digital pin 5
 * Blue anode: digital pin 6
 * Cathode : GND

 created 13 Apr 2012
 by Tom Igoe
 
 modified 14 Mar 2016
 by Arturo Guadalupi

 This example code is in the public domain.
 */


void setup() {
  // initialize serial:
  Serial.begin(9600);
  // make the pins outputs:
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, LOW);
}

void loop() {
    char inByte = Serial.read(); // read the incoming data
    if (inByte=='o'){
      digitalWrite(LED_BUILTIN, LOW);
    } else if (inByte=='c'){
      digitalWrite(LED_BUILTIN, HIGH);
    }
  
}