String rojo;
String verde;
String azul;

int ledRojo = 11;
int ledVerde = 10;
int ledAzul = 9;

void setup() {
  // put your setup code here, to run once:
pinMode(ledRojo, OUTPUT);
pinMode(ledVerde, OUTPUT);
pinMode(ledAzul, OUTPUT);

Serial.begin(9600);
Serial.print("Serial iniciado: \n");
}

void loop() {
  // put your main code here, to run repeatedly:
/*analogWrite(ledRojo,255);
analogWrite(ledVerde,0);
analogWrite(ledAzul,0);

analogWrite(ledRojo,0);
analogWrite(ledVerde,255);
analogWrite(ledAzul,0);

analogWrite(ledRojo,0);
analogWrite(ledVerde,0);
analogWrite(ledAzul,255);*/

if (Serial.available() > 0) { // Verifica si hay datos disponibles en la terminal 
    String cadena = Serial.readStringUntil('\n');
    Serial.println(cadena);
    rojo = cadena.substring(0,3);
    Serial.println(rojo);
    verde = cadena.substring(4,7);
    Serial.println(verde);
    azul = cadena.substring(8,11);
    Serial.println(azul);

int r = rojo.toInt();
int g = verde.toInt();
int b = azul.toInt();

analogWrite(ledRojo,r);
analogWrite(ledVerde,g);
analogWrite(ledAzul,b);   

}
}