int ledPin = A3; // specify the pin for the LED light
bool led = 0;
int incomingByte;

void setup() {
  incomingByte = 0;
  Serial.begin(9600); // open serial communication at 9600 baud
  pinMode(ledPin, OUTPUT); // set the pin mode to output
  Serial.println();
}

void loop() {
  if (Serial.available() > 0) { // check if there is data available
    incomingByte = Serial.read();
    analogWrite(ledPin, incomingByte);
    Serial.println(incomingByte);
    /*String incoming = Serial.readString(); // read the data as a string
    if (incoming == "255") { // if the received data is "toggle"
      led = 1;
    }
    if (incoming == "0") { // if the received data is "toggle"
      led = 0;
    }
    digitalWrite(ledPin, led); // toggle the LED light*/
  }
  
}