Cannot Find the Ocean HDX Spectrometer

[CL1002]

Dear all,
I want to use the updated version seabreeze to access to an Ocean HDX spectrometer through python. Therefore, I have run the code beneath.

import seabreeze
seabreeze.use('pyseabreeze')
from seabreeze.spectrometers import Spectrometer
devices = list_devices()
spec = Spectrometer.from_first_available()

However, it cannot find my Ocean HDX spectrometer and report the error as follows:

C:\Users\ezzcl1\PycharmProjects\EndoTrachealProject\venv\Scripts\python.exe C:/Users/ezzcl1/PycharmProjects/EndoTrachealProject/ControlSoftwareInterface/Test2.py
Traceback (most recent call last):
  File "C:/Users/ezzcl1/PycharmProjects/EndoTrachealProject/ControlSoftwareInterface/Test2.py", line 7, in <module>
    spec = Spectrometer.from_first_available()
  File "C:\Users\ezzcl1\PycharmProjects\EndoTrachealProject\venv\lib\site-packages\seabreeze\spectrometers.py", line 91, in from_first_available
    raise cls._backend.SeaBreezeError("No unopened device found.")
seabreeze.pyseabreeze.exceptions.SeaBreezeError: No unopened device found.

Process finished with exit code 1

I have searched online, and found that a libusb driver was possibly required. Therefore, I have used libusb-win32 to create an inf file for the HDX spectrometer. Then, I have a run a simple code (beneath) and found the device this time. But when I run the seabreeze code again, it still reported "No unopened device found". Does any one has any idea? Thank you very much.

import time
import usb.core
import usb.util

VID = 0x2457
PID = 0x101E

dev = usb.core.find(idVendor=VID, idProduct=PID)
if not dev:
    print('Could not find the device')
else:
    print('Find the device')

@ap-- Andreas, Thanks a lot for replying my inappropriate comments in the issue #60. I won't ask questions in any closed issue again.

Cheers,
Chong

[ap--]

Hi Chong,

The code snippet you posted defines PID as 0x101E which, if I am not mistaken, is not the product Id of the HDX. Do you have other ocean optics spectrometers connected to this PC?

Cheers,
Andreas

[CL1002]

Hi Andreas,

Sorry for misleading you. Yes, I have another spectrometer (USB2000+). Since I cannot connect my HDX spectrometer, I have tried to connect the USB2000+ in order to eliminate the other problems (i.e. Pyusb or connection problems). When I used seabreeze.use('pyseabreeze') backend , it could not identify my USB2000+ spectrometer either. However, when I used seabreeze.use('cseabreeze') backend, it could identify my USB2000+ (but cannot find HDX as well). Thus, I thought that a special driver was required. Then I have generated the drivers for both USB2000+ and HDX.

The code I used to find out the HDX spectrometer is as follows:

import time
import usb.core
import usb.util

VID = 0x2457
PID = 0x2003

dev = usb.core.find(idVendor=VID, idProduct=PID)
if not dev:
    print('Could not find the device')
else:
    print('Find the device')

Apologise again for attaching the wrong code.

Thanks very much.

Cheers,
Chong

[ap--]

Hi Chong,
that is very useful information.
So if I understand correctly, when you only connect the USB2000+ and run the following code, it does not find a spectrometer?:

import seabreeze
seabreeze.use('pyseabreeze')
from seabreeze.spectrometers import Spectrometer
devices = list_devices()
spec = Spectrometer.from_first_available()

If that is is true, then there must be another error somewhere. Because the USB2000+ is guaranteed to work with pyseabreeze under windows.
I would try to get the USB2000+ running with the code above. It could be that you haven't installed the libusb driver correctly.

Try this tool: https://zadig.akeo.ie/ to install the WinUSB driver for the USB2000+ and see if you can get it to work.

Cheers,
Andreas 😃

[CL1002]

Hi Andreas,

I have installed the WinUSB drive for the USB2000+ using the zadig tool as follows:

Then, my USB2000+ spectrometer shown in the device list as follows:

I have then run the following code:

import seabreeze
seabreeze.use('pyseabreeze')
from seabreeze.spectrometers import Spectrometer
devices = list_devices()
spec = Spectrometer.from_first_available()

What I have got is as follows:

C:\Users\ezzcl1\PycharmProjects\EndoTrachealProject\venv\Scripts\python.exe C:/Users/ezzcl1/PycharmProjects/EndoTrachealProject/ControlSoftwareInterface/Test2.py
Traceback (most recent call last):
  File "C:/Users/ezzcl1/PycharmProjects/EndoTrachealProject/ControlSoftwareInterface/Test2.py", line 5, in <module>
    spec = Spectrometer.from_first_available()
  File "C:\Users\ezzcl1\PycharmProjects\EndoTrachealProject\venv\lib\site-packages\seabreeze\spectrometers.py", line 91, in from_first_available
    raise cls._backend.SeaBreezeError("No unopened device found.")
seabreeze.pyseabreeze.exceptions.SeaBreezeError: No unopened device found.

Process finished with exit code 1

What's more, it cannot find the USB2000+ even I usedcseabreezebackend this time. 😂 Do you have any ideas ?

Sorry for bothering you a lot on this and thanks very much for your help.

Cheers,
Chong

[ap--]

Hi Chong,

no worries, I just got back from a holiday :)
So the result you posted shows, that pyusb works on this machine. Could you connect the usb2000+ to this PC and try running this code:

import seabreeze
seabreeze.use('pyseabreeze')
from seabreeze.spectrometers import Spectrometer
devices = list_devices()
spec = Spectrometer.from_first_available()

If that works, then I would try the HDX next with the same PC and the same code.

Cheers,
Andreas

[CL1002]

Hi Andreas,

Hope you have a good holiday. :D
I have tried the code as follows:

import seabreeze
seabreeze.use('pyseabreeze')
from seabreeze.spectrometers import Spectrometer, list_devices
devices = list_devices()
print(devices)
spec = Spectrometer.from_first_available()

The result I got is as follows:

C:\Users\Chong\PychamProjects\pythonProject\venv\Scripts\python.exe C:/Users/Chong/PycharmProjects/pythonProject/main.py
[]
Traceback (most recent call last):
   File "C:/Users/Chong/PycharmProjects/pythonProject/main.py", line 23, in <module>
      spec = Spectrometer.from_first_available()
   File"C:\Users\Chong\PycharmProjects\pythonProject\venv\lib\site-packages\seabreeze\spectrometers.py", line 91, in from first avilable
      raise cls._backend.SeaBreezeError("No unopened device found.")
seabreeze.pyseabreeze.exceptions.SeaBreezeError: No unopened device found.

Process finished with exit code 1

According to the result, this PC cannot find the USB2000+ spectrometer as well. I have replaced seabreeze.use('pyseabreeze') with code seabreeze.use('cseabreeze') as previous. It works, and the result is listed below:

C:\Users\Chong\PychamProjects\pythonProject\venv\Scripts\python.exe C:/Users/Chong/PycharmProjects/pythonProject/main.py
[<SeaBreezeDevice USB2000PLUS:USB2+H14073>]

Process finished with exit code 0

Could be this problem caused by the IDE I used (Pycharm Community Edition 2020.3.2 x64)?

Thanks.

Best regards,
Chong Liu

[ap--]

Hi Chong,

It's very strange that this doesn't work on your machine.
The USB2000+ is probably the best tested Spectrometer on the different OSes for python-seabreeze.
Your IDE shouldn't be the problem.

Without having direct access, I'm running a bit out of ideas what the problem could be.
Other things you might try are:

• Are you keeping OceanView open while you try running the Python code? (If so, please close it.)
• Have you run seabreeze_os_setup after installing seabreeze? (If not, please run it.)
• Use anaconda and create a conda environment with seabreeze installed and try if it works with that.
• Try creating the virtual env and running the code in a terminal with admin rights

Cheers,
Andreas

[CL1002]

Hi Andreas,

Sorry for such late reply. I was just back from my annual leave.

I will try to use these methods. My line manager decided to purchase the ocean direct development kit. If I still could not drive HDX by using the pyseabreeze, I will use the ocean direct development kit then.

Thank you very much. I really appreciate all of your help. You are really kind and patient. Wish we could find the reason for the problem in the future. And I am looking forward to discussing with you about other python programs in the future.

Best regards,
Chong Liu

[ap--]

Hi Chong,

No worries ☺️
There's been quite a few reported user issues now with the HDX under Windows.
It'll probably require more debugging in the future until someone finds the root cause for this.
As soon as that happens I will release a new version of seabreeze.

Have a great day!
Cheers,
Andreas 😃