import select
import sys
import time
import machine
from picozero import LED


poll_obj = select.poll()
poll_obj.register(sys.stdin,1)
led=LED(27)

while True:
    if poll_obj.poll(0):
        dato = int(sys.stdin.readline())
        led.brightness = dato/255.0
    time.sleep(0.01)


'''


import processing.serial.*;

Serial myPort;  
int val;        

void setup()
{
  size(200, 200);
  String portName = Serial.list()[0];
  myPort = new Serial(this, portName, 115200);
}

void draw() {
  myPort.write(mouseX+"\r"); // hay que neviar un cambio de linea después del dato
}


'''