//pin definitions
int redPin = 7;
int greenPin = 5;
int bluePin = 6;
int buttonPin = 2;

//serial vars
char commandBuffer[512];
uint8_t buffPos = 0;
byte incomingByte = 0;
String line = "";
bool avail = false;

//button vars
int prev = LOW;
int reading = LOW;

void setup()
{
  Serial.begin(9600);

  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);

  pinMode(buttonPin, INPUT);

  analogWrite(redPin, 0);
  analogWrite(greenPin, 0);
  analogWrite(bluePin, 0);
}

void loop()
{

  SerialRead();

  if(avail){
    avail=false;
    if(line.equals("green"))
     digitalWrite(greenPin, HIGH);
    else if(line.equals("red")){
     digitalWrite(redPin, HIGH);
    else if(line.equals("yellow"))
     digitalWrite(bluePin, HIGH);


  }

  reading = digitalRead(buttonPin);

  if(reading!=prev){
    if(reading == HIGH)
      Serial.println("button_high");
    else
      Serial.println("button_low");
    prev = reading;
  }



}

void setColor(int red, int green, int blue)
{
  analogWrite(redPin, red);
  analogWrite(greenPin, green);
  analogWrite(bluePin, blue);
}

void serialRead(){
  if (Serial.available() > 0) {
    incomingByte = Serial.read();
    if (incomingByte == 13) {

      line = commandBuffer;
      line.trim();
      avail = true;

      memset(commandBuffer, 0, 100);
      buffPos = 0;
    }else{
      commandBuffer[buffPos] = incomingByte;
      buffPos++;
    }
  }
}