int r,g,b;
char colors[3];
String str;
boolean can_change = true;

int redPin = 9;
int greenPin = 10;
int bluePin = 11;

void setup() {
  Serial.begin(115200);
}

void loop() {
    str = Serial.readString();

    r = getValue(str, ':', (int)0).toInt();
    g = getValue(str, ':', (int)1).toInt();
    b = getValue(str, ':', (int)2).toInt();
    setColor(r,g,b);

    Serial.println("can_send");

}

void setColor(int red, int green, int blue)
{
  #ifdef COMMON_ANODE
    red = 255 - red;
    green = 255 - green;
    blue = 255 - blue;
  #endif
  analogWrite(redPin, red);
  analogWrite(greenPin, green);
  analogWrite(bluePin, blue);
}


 String getValue(String data, char separator, int index)
{
  int found = 0;
  int strIndex[] = {0, -1};
  int maxIndex = data.length()-1;

  for(int i=0; i<=maxIndex && found<=index; i++){
    if(data.charAt(i)==separator || i==maxIndex){
        found++;
        strIndex[0] = strIndex[1]+1;
        strIndex[1] = (i == maxIndex) ? i+1 : i;
    }
  }

  return found>index ? data.substring(strIndex[0], strIndex[1]) : "";
}