Question

错误：x_wmi：意外的COM错误（-2147217406，＆＃39; OLE错误0x80041002＆＃39;，无，无）

我试图让Windows PC检测到Ardunio的COM端口。代码有时会起作用，有时也不会，当它没有得到上面列出的错误时。

通过插入和删除Ardunio来测试代码（为Windows提供足够的时间来识别它被删除）。我试着搜索错误但没有出现。

编辑：通过更多搜索，我发现它与Object Not Found Error有关。当任何COM端口发生变化时（当我插入任何USB设备时）会发生这种情况。代码可以处理中途改变的列表，因此会抛出此错误。我不知道如何以这种方式处理错误，它允许USB设备改变。

langpy：

    import os
    import time
    import ctypes
    import wmi
    import thread
    import pythoncom
    import locale

    def lang():
            localelang = locale.getdefaultlocale()
            language = str(localelang)[2:7]
            #print (language)
            return language

    def port():
                    while True:
                            pythoncom.CoInitialize()
                            Ardport = ""
                            c = wmi.WMI()
                            wql = "Select * From Win32_USBControllerDevice"
                            for item in c.query(wql):
                                            s = str(item.Dependent.Caption)
                                            #print (item.Dependent.Caption)
                                            strfind = "Arduino"
                                            strignore = "bootloader"
                                            if (s.find(strfind) >= 0 and s.find(strignore) == -1):
                                                    Ardport = item.Dependent.Caption
                            time.sleep(1)
                            return Ardport

主要代码：

    # -*- coding: utf-8 -*-

    import time
    import thread
    import os
    import serial
    import sys
    import ctypes
    import wmi
    from langpy import lang
    from langpy import port
    import pythoncom




    class service_test:
            def __init__(self):
                    thread.start_new(self.check_for_Ardunio, tuple())

            def check_for_Ardunio(self):
                    comp = ""
                    reply = ""
                    j1 = -1
                    while True:
                            plang = (str(lang()))
                            pport = (str(port()))
                            if (pport != ""):
                                    j1 = pport[-2:-1]
                                    comp = ('COM' + j1)
                                    if (reply == "reply" and j1 < 0):
                                            ser = serial.Serial(comp, 9600, timeout=1)
                                            if(ser.isOpen()):
                                                ser.write(lang)
                                                print ("sent message")
                            else:
                                    time.sleep(1)
                                    reply = ""
                                    j1 = -1
                                    comp = 'COM'
                    #DEBUGGING
                            print(comp)
                            print(plang)
                            print(pport)
                            print (j1)
                            print (str(reply)) 
                            print ("")

    if __name__ == "__main__":
            tst = service_test()

完整错误报告：

Unhandled exception in thread started by <bound method service_test.check_for_Ardunio of <__main__.service_test instance at 0x01FEE6C0>>
Traceback (most recent call last):
  File "C:\Users\LeakDetectSys\Desktop\Keyboard\testing\application\test1wc.py", line 27, in check_for_Ardunio
    pport = (str(port()))
  File "C:\Users\LeakDetectSys\Desktop\Keyboard\testing\application\langpy.py", line 25, in port
    s = str(item.Dependent.Caption)
  File "C:\Python27\lib\site-packages\wmi.py", line 555, in __getattr__
    return WMI (moniker=value)
  File "C:\Python27\lib\site-packages\wmi.py", line 1290, in connect
    handle_com_error ()
  File "C:\Python27\lib\site-packages\wmi.py", line 241, in handle_com_error
    raise klass (com_error=err)
wmi.x_wmi: <x_wmi: Unexpected COM Error (-2147217406, 'OLE error 0x80041002', None, None)>

x_wmi：意外的COM错误（获取COM端口地址）Python2.7

0 个答案: