Arduino - Έλεγχος χρώματος LED από console

#define blue 3
#define green 5
#define red 6

char blueC = "b";
char greenC = "g";
char redC = "r";


void setup() {
  // put your setup code here, to run once:
  pinMode(3, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
  char c;

  if(Serial.available()){
    c = Serial.read();
    if(c == 'r'){
      analogWrite(red, 0);
      analogWrite(blue, 255);
      analogWrite(green, 255);
    }else if(c == 'b'){
      analogWrite(blue, 0);
      analogWrite(red, 255);
      analogWrite(green, 255);
    }else if(c == 'g'){
      analogWrite(green, 0);
      analogWrite(blue, 255);
      analogWrite(red, 255);
    }else{
      Serial.println();
    }
  }

  delay(500);


}