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The installation works normally but it doesn't detect the USB device.
The solution was to install pyusb:
```bash
pip install pyusb
```
https://techoverflow.net/2019/08/08/how-to-fix-pyvisa-not-…
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pip install --upgrade https://github.com/pklaus/brother_ql/archive/master.zi fails at the point
Installing collected packages: pillow, pyusb, brother-ql
Running setup.py install for pillow ... e…
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I downloaded pyserial, pyusb, python 2.7, libusb, and got the vid and pid of the sign using libusb. When I try to run the code example on the alphasign api homepage, I get a core dump. :(
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Hi,
I am observing the following error with CMSIS-DAP v2 (WinUSB) devices either running DAPLink ver. 0254 or Cypress KitProg3:
> C:\Users\anjo>pyocd list
> Exception ignored in:
> Traceback …
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Go through all the files and prune unused code. Everything related to pyusb is dead code now and must go.
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After looking at successful transfers from my RIgol ds1054z (screen captures 30kbytes in size) on the NI backend, and comparing them with my Ubuntu pyvisa-py backend... I believe pyusb is messing-up s…
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The code below attempts to connect to a non-existent hislip instrument "hislip999" on the local machine. The call to 'open_resource' hangs.
To Reproduce
--------------
```python
import pyvisa
…
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It would be great if the script would check for dependencies. I had to install pyusb for instance.
Perhaps a quick check for the dependencies would be useful, even a prompt to run pip install?
kalpo updated
2 years ago
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I installed libusb-win32 and key "brother_ql -b pyusb discover"
It's display Found a label printer: usb//0x04f9:0x209c
My device model name is QL-810W
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I found I can get two different errors (`UsbToolsError` or `USBError`) in essentially the same place, when a USB disconnect occurs.
Underlying (hardware) problem is MiniUSB connector on FT4232 modu…