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我无法读取运动传感器 (HC-SR501) 的输入，该传感器连接到我的 ai 语音套件的语音引擎盖上的扩展引脚的 PIN_A。

以下是代码和错误消息，请说明。

代码：

from gpiozero import MotionSensor
from aiy.pins import (PIN_A, PIN_B, PIN_C, PIN_D)
pir = MotionSensor(PIN_A)
pir.wait_for_motion()
print("Motion detected!")

错误信息：

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/gpiozero/input_devices.py", line 51, in __init__
    self.pin.pull = pull
  File "/usr/lib/python3/dist-packages/gpiozero/pins/__init__.py", line 279, in <lambda>
    lambda self, value: self._set_pull(value),
  File "/opt/aiy/projects-python/src/aiy/pins.py", line 569, in _set_pull
    'Only pull up is supported right now (%s)' % pull)
gpiozero.exc.PinFixedPull: Only pull up is supported right now (down)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "motion_sensor.py", line 4, in <module>
    pir = MotionSensor(PIN_A)
  File "/usr/lib/python3/dist-packages/gpiozero/devices.py", line 95, in __call__
    self = super(GPIOMeta, cls).__call__(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/gpiozero/input_devices.py", line 451, in __init__
    pin_factory=pin_factory
  File "/usr/lib/python3/dist-packages/gpiozero/input_devices.py", line 163, in __init__
    pin, pull_up, pin_factory=pin_factory
  File "/usr/lib/python3/dist-packages/gpiozero/mixins.py", line 164, in __init__
    super(EventsMixin, self).__init__(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/gpiozero/input_devices.py", line 53, in __init__
    self.close()
  File "/usr/lib/python3/dist-packages/gpiozero/input_devices.py", line 185, in close
    super(SmoothedInputDevice, self).close()
  File "/usr/lib/python3/dist-packages/gpiozero/devices.py", line 393, in close
    self.pin_factory.release_pins(self, self._pin.number)
AttributeError: 'HatPin' object has no attribute 'number'
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/gpiozero/devices.py", line 483, in _shutdown
    _devices_shutdown()
  File "/usr/lib/python3/dist-packages/gpiozero/devices.py", line 476, in _devices_shutdown
    dev.close()
  File "/usr/lib/python3/dist-packages/gpiozero/input_devices.py", line 185, in close
    super(SmoothedInputDevice, self).close()
  File "/usr/lib/python3/dist-packages/gpiozero/devices.py", line 393, in close
    self.pin_factory.release_pins(self, self._pin.number)
AttributeError: 'HatPin' object has no attribute 'number'
Exception ignored in: <object repr() failed>
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/gpiozero/devices.py", line 122, in __del__
    self.close()
  File "/usr/lib/python3/dist-packages/gpiozero/input_devices.py", line 185, in close
    super(SmoothedInputDevice, self).close()
  File "/usr/lib/python3/dist-packages/gpiozero/devices.py", line 393, in close
    self.pin_factory.release_pins(self, self._pin.number)
AttributeError: 'HatPin' object has no attribute 'number'
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1 回答 1

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你解决了吗？

通过查看API和您的错误消息，尝试更改代码的第 3 行

来自：

pir = MotionSensor(PIN_A)

至：

pir = MotionSensor(PIN_A, pull_up=True)
于 2020-02-21T13:57:34.187 回答