from machine import Pin
from time import sleep

def cmdNext():
  global io1, io2
  io1.value(1)
  sleep(0.1)
  io1.value(0)

def cmdPre():
  global io1, io2
  io2.value(1)
  sleep(0.1)
  io2.value(0)

def cmdVolM():
  global io1, io2
  io1.value(1)
  sleep(1)
  io1.value(0)

def cmdVolP():
  global io1, io2
  io2.value(1)
  sleep(1)
  io2.value(0)

io1 = Pin(17, Pin.OUT)
io2 = Pin(18, Pin.OUT)

sleep(10)

cmdPre()
sleep(1)
cmdNext()