usb.core.USBError: [Errno None] b'libusb0-dll:err [set_configuration] could not set config 1

Question

usb.core.USBError: [Errno None] b'libusb0-dll:err [set_configuration] could not set config 1

Closed this issue 2 years ago · 7 comments

OS: Windows 10
Python version: 3.9 64 bit
NXT-Python version: 3.0.1
Connection method: USB? Bluetooth? USB

Hi there. I am trying to connect my NXT brick to python using this library. But, it wasn't detecting it. I have updated my firmware to 1.31, but that didn't help. Also, I have found an article that said that I need to install libusb filters. But after installing them, the test program doesn't want to work at all.
Here is the error:

  File "C:\Users\username\test\test.py", line 2, in <module>
    with nxt.locator.find(name="NXT") as b:
  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\site-packages\nxt\locator.py", line 213, in find
    brick = next(iter_bricks(), None)
  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\site-packages\nxt\locator.py", line 191, in iter_bricks
    for brick in backend.find(name=name, host=host, **filters):
  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\site-packages\nxt\backend\usb.py", line 102, in find
    brick = sock.connect()
  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\site-packages\nxt\backend\usb.py", line 57, in connect
    self._dev.set_configuration()
  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\site-packages\usb\core.py", line 915, in set_configuration
    self._ctx.managed_set_configuration(self, configuration)
  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\site-packages\usb\core.py", line 113, in wrapper
    return f(self, *args, **kwargs)
  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\site-packages\usb\core.py", line 159, in managed_set_configuration
    self.backend.set_configuration(self.handle, cfg.bConfigurationValue)
  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\site-packages\usb\backend\libusb0.py", line 509, in set_configuration
    _check(_lib.usb_set_configuration(dev_handle, config_value))
  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\site-packages\usb\backend\libusb0.py", line 447, in _check
    raise USBError(errmsg, ret)
usb.core.USBError: [Errno None] b'libusb0-dll:err [set_configuration] could not set config 1: win error: \xcf\xe0\xf0\xe0\xec\xe5\xf2\xf0 \xe7\xe0\xe4\xe0\xed \xed\xe5\xe2\xe5\xf0\xed\xee.\r\n'

The symbols that start with \x are the symbols of my language, because windows reports errors on user's language.
Sorry for that.

Why is this happening? How can I fix this?

Answer 1 · 2022-04-19T19:29:22.000Z

What are those libusb filters? What is the article you refer to?

Can you translate the error message given in your langage?

Thanks.

Answer 2 · 2022-04-19T20:55:17.000Z

Hi. I don't know, the article said that I need to install it, so I did. The article is on russian, use translator please: http://nnxt.blogspot.com/2012/11/nxt-python-windows.html I would do that, If I could actually read it.. Can you give me decoded text? I don't know what encoding it is. Greetings, Emil.

Answer 3 · 2022-04-19T20:59:01.000Z

Also in the article they used Python 2, but I used python 3. Also I tried doing the beep with old version of this library that I have found somewhere in the internet, and it worked perfectly. I've needed this library for a project, but it would be nice if I can somehow bypass this error and work with fresh library and not release a project with 2 different versions of python(first part is on Python 3.9 and the nxt part is on 2.7)

Answer 4 · 2022-04-20T16:15:26.000Z

I tried this:

>>> b"\xcf\xe0\xf0\xe0\xec\xe5\xf2\xf0 \xe7\xe0\xe4\xe0\xed \xed\xe5\xe2\xe5\xf0\xed\xee".decode("cp1251")
'Параметр задан неверно'
>>>

According to translator: “Parameter set incorrectly”.

Can you try to comment out self._dev.set_configuration() in nxt/backend/usb.py and see if it works?

Answer 5 · 2022-04-20T16:19:37.000Z

You can also try commenting out the reset line above, some tests to do:

without set_configuration
without reset but with set_configuration
without neither reset nor set_configuration

Thanks.

Answer 6 · 2022-04-21T08:08:49.000Z

I tried this:
>>> b"\xcf\xe0\xf0\xe0\xec\xe5\xf2\xf0 \xe7\xe0\xe4\xe0\xed \xed\xe5\xe2\xe5\xf0\xed\xee".decode("cp1251")
'Параметр задан неверно'
>>>
According to translator: “Parameter set incorrectly”.

Can you try to comment out self._dev.set_configuration() in nxt/backend/usb.py and see if it works?

Hi. Now it outputs this:

  File "C:\Windows.old\Users\Username\Desktop\test\test.py", line 4, in <module>
    with nxt.locator.find() as b:
  File "C:\Users\Username\AppData\Local\Programs\Python\Python39\lib\site-packages\nxt\locator.py", line 213, in find
    brick = next(iter_bricks(), None)
  File "C:\Users\Username\AppData\Local\Programs\Python\Python39\lib\site-packages\nxt\locator.py", line 191, in iter_bricks
    for brick in backend.find(name=name, host=host, **filters):
  File "C:\Users\Username\AppData\Local\Programs\Python\Python39\lib\site-packages\nxt\backend\usb.py", line 102, in find
    brick = sock.connect()
  File "C:\Users\Username\AppData\Local\Programs\Python\Python39\lib\site-packages\nxt\backend\usb.py", line 58, in connect
    intf = self._dev.get_active_configuration()[(0, 0)]
  File "C:\Users\Username\AppData\Local\Programs\Python\Python39\lib\site-packages\usb\core.py", line 921, in get_active_configuration
    return self._ctx.get_active_configuration(self)
  File "C:\Users\Username\AppData\Local\Programs\Python\Python39\lib\site-packages\usb\core.py", line 113, in wrapper
    return f(self, *args, **kwargs)
  File "C:\Users\Username\AppData\Local\Programs\Python\Python39\lib\site-packages\usb\core.py", line 252, in get_active_configuration
    bConfigurationValue=self.backend.get_configuration(self.handle)
  File "C:\Users\Username\AppData\Local\Programs\Python\Python39\lib\site-packages\usb\backend\libusb0.py", line 519, in get_configuration
    ret = self.ctrl_transfer(
  File "C:\Users\Username\AppData\Local\Programs\Python\Python39\lib\site-packages\usb\backend\libusb0.py", line 601, in ctrl_transfer
    return _check(_lib.usb_control_msg(
  File "C:\Users\Username\AppData\Local\Programs\Python\Python39\lib\site-packages\usb\backend\libusb0.py", line 447, in _check
    raise USBError(errmsg, ret)
usb.core.USBError: [Errno None] b'libusb0-dll:err [control_msg] sending control message failed, win error: \xcd\xe5 \xf3\xe4\xe0\xe5\xf2\xf1\xff \xed\xe0\xe9\xf2\xe8 \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xf4\xe0\xe9\xeb.\r\n\n'

And I still have no idea how to convert these symbols into text that I can translate.

I've commented the reset line as you said, but left configuration sit still and it worked! Thanks!

Answer 7 · 2022-04-21T08:38:06.000Z

To convert, i pasted the error on a python3 interpreter and used the decode method:

% python3
Python 3.9.2 (default, Feb 28 2021, 17:03:44) 
[GCC 10.2.1 20210110] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> b'\xcd\xe5 \xf3\xe4\xe0\xe5\xf2\xf1\xff \xed\xe0\xe9\xf2\xe8 \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xf4\xe0\xe9\xeb'.decode('cp1251')
'Не удается найти указанный файл'
>>>

I can add a workaround for windows, I have seen old code skipping the reset for Windows.

@dbrown3562 could you confirm that you also need to comment out reset to make it work on Windows?