更多内容可参考 machine.Pin 。
example:
>>> from machine import Pin
>>>
>>> p_out = Pin(("X1", 33), Pin.OUT_PP)
>>> p_out.value(1) # set io high
>>> p_out.value(0) # set io low
>>>
>>> p_in = Pin(("X2", 32), Pin.IN, Pin.PULL_UP)
>>> p_in.value() # get value, 0 or 1