AttributeError: 'NoneType' object has no attribute 'send' pigpiod

Question

所以我创建了另一个程序，可以运行步进电机顺时针和逆时针旋转，并在那里进行斜坡上升和斜坡下降，并在 GPIO 16 和 26 上添加限制器开关以停止 pi.wave_send_using_mode(wid2, pigpio.WAVE_MODE_ONE_SHOT_SYNC)给一个连锁波，这是我的代码：

import time
import pigpio

START_DELAY=600
FINAL_DELAY=500
STEP=1

GPIO=20

pi = pigpio.pi()

pi.set_mode(GPIO, pigpio.OUTPUT)
pi.set_mode(21, pigpio.OUTPUT)
pi.set_mode(26,pigpio.INPUT)
pi.set_mode(16,pigpio.INPUT)
#pi.write(21,1)
pi.wave_clear()

statee = 0
try:
    while True:

        pi.write(21,statee)
        pi.wave_clear()

        wf=[]
        offset = pi.wave_get_micros()
        for delay in range(START_DELAY, FINAL_DELAY, -STEP):
           wf.append(pigpio.pulse(1<<GPIO, 0,       delay))
           wf.append(pigpio.pulse(0,       1<<GPIO, delay))

        for i in range(500):
            wf.append(pigpio.pulse(1<<GPIO, 0,       FINAL_DELAY))
            wf.append(pigpio.pulse(0,       1<<GPIO, FINAL_DELAY))
        wf.append(pigpio.pulse(0, 0, offset))

        for delay in range(FINAL_DELAY, START_DELAY, STEP):
           wf.append(pigpio.pulse(1<<GPIO, 0,       delay))
           wf.append(pigpio.pulse(0,       1<<GPIO, delay))

        pi.wave_add_generic(wf)

        wid2 = pi.wave_create()

        #pi.wave_send_once(wid2)
        pi.wave_send_using_mode(wid2, pigpio.WAVE_MODE_ONE_SHOT_SYNC)

        if pi.read(26) == 0:
            pi. wave_tx_stop()
            pi.stop()
        if pi.read(16) == 0:
            pi.wave_tx_stop()
            pi.stop()

        time.sleep(0.75)
        if statee == 0:
            statee = 1
        elif statee == 1:
            statee = 0
except KeyboardInterrupt:
    print ("\nCtrl-C pressed.  Stopping PIGPIO and exiting...")
    pi.wave_tx_stop()
    pi.stop()

问题发生在电机运行大约 5 - 10 分钟时，我给出这样的错误消息：

Traceback (most recent call last):


File "/home/pi/Desktop/ramp.py", line 49, in <module>
    if pi.read(16) == 0:
  File "/usr/local/lib/python3.4/dist-packages/pigpio.py", line 1401, in read
    return _u2i(_pigpio_command(self.sl, _PI_CMD_READ, gpio, 0))
  File "/usr/local/lib/python3.4/dist-packages/pigpio.py", line 989, in _pigpio_command
    sl.s.send(struct.pack('IIII', cmd, p1, p2, 0))
AttributeError: 'NoneType' object has no attribute 'send'

那么，我的代码出错的原因是什么？这是 pi.read(26) 和 pi.read(16) 的原因吗？有没有其他方法可以在进程中间停止或终止 pi.wave_send_using_mode(wid2, pigpio.WAVE_MODE_ONE_SHOT_SYNC)？谢谢你小记：我通过follow（https://raspberrypi.stackexchange.com/questions/70568/how-to-run-pigpiod-on-boot KimSJ answer）设置了pigpiod daemon start on boot，是运行img pigpiod 的方法导致了这个错误吗？谢谢

更新：在我清除 pi.read(26) 和 pi.read(26) 上的 pi.stop() 并将 pigpiod 版本更新为 v68 后，所有内容运行正确无误

Answer 1

在我清除 pi.read(26) 和 pi.read(26) 上的 pi.stop() 并将 pigpio 版本更新到 v68 后，一切运行正确无误

AttributeError: 'NoneType' object has no attribute 'send' pigpiod

AttributeError: 'NoneType' object has no attribute 'send' pigpiod

python-3.x

raspberry-pi3

gpio