String android;
int pwm1=9;
int led13=13;

void setup() {
  Serial.begin(9600);
  pinMode(pwm1,OUTPUT);
   //pinMode(led13,OUTPUT);//Se eu declara-lo, não ativará a decisão

void loop() {
  
    //Serial.print(":");
    //delay(500);
  
  if (Serial.available()>0){
      android = Serial.readString();

      if(android.startsWith("pwm1")){
        android.replace("pwm1","");
        analogWrite(pwm1,android.toInt());
      delay(20);
        Serial.println(android);
      }
 }//fim loop

  void serialEvent() {
    while (Serial.available()) {
    char CharSerialRX = (char)Serial.read();
    delay(10);
        if (CharSerialRX =='A'){
       
            digitalWrite(led13,HIGH); 
         } 
         if (CharSerialRX =='D'){
       
            digitalWrite(led13,LOW); 
         } 
         
    Serial.print("Recebido: ");
    Serial.print(CharSerialRX); 
  }
}