Labjack and Python Drivers

[zacman55]

Hi,

I am looking to see if a device called Labjack can be used with Dasylab.   The interest is to interface with another project and also the ethernet connection on these devices.

I understand the script module supports python scripts and I have a python library provided by Labjack.  Are there any sample script drivers?  I really don't know where to start in terms of what to output in Dasylab and how to setup the channels, blocks, etc.    I read through the Dasylab documentation but it really doesn't get me started.

I really want to be able to use the high speed streaming function, but I would start with a modbus script just to get some understanding of how python works with Dasylab.

Anyone have anything they could offer?

https://labjack.com/support/software/examples/ljm/python

Thanks,

-Z

[stephan.gerhards]

Hello

Please have a look at out webseite at

https://www.measx.com/en/products/software/dasylab/examples

Here you can find more examples, some of them more extensive, which require at least a Dasylab 2016.

This download contains examples in the following areas:

• Dialog, user interface
• Channel types, channel flags
• Channel relation
• Channel flag “Short Block”
• Mathematics
• Access to global DASYLab variables

Please have a look at it.

Best regards

Stephan

[hw70]

Additionally, attached you can find two example scripts for data source modules.

serial_com.py asks a device for data, the device answers. The script parses that answer and outputs the example value.

eigene_zeitbasis.py (sorry, the comments are in German language) shows how to provide a time base, so other DASYLab data source modules can output their data synchronously.
The script uses a "virtual device" to generate data on its own. The interface is a simplified API, that provides some basic functions like Open(), Close(), CheckIfDataIsReady(), GetData().

I think you will be able to get the trick on how to talk to you own devices.

[zacman55]

Stephen,

Thank you for the fast response.  I did not notice the examples section of your website.

I tried to download the script example package but I get a 404 error, file not found.

hw70, 

Thanks for the example files, I will review.  Appreciate the help.

-Zac

[mrt501 · Accepted solution]

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@zacman55 wrote:

Stephen,

Thank you for the fast response.  I did not notice the examples section of your website.

I tried to download the script example package but I get a 404 error, file not found.

Should be fixed, now. https://www.measx.com/downloads/DL_Examples/examples_scriptmodule.14.0.0.480.en.dlp

[zacman55]

Thanks for the example files.  I was able to get data (from 1 AIN channel for now) from the labjack into dasylab.  I'm really shocked it started working (since I don't know anything about python), but satisfying to stop getting errors.

There are some pains with adding the library to the Dasylab python folder (since I couldn't get the local pip to work, bigger issues with my path since I have python also installed on the windows machine).

If anyone is interested in the code I can share.

[LabJackSupport]

LabJack has greatly expanded our support for DASYLab. Since you previously asked about DASYLab I wanted to bring it to your attention in case you missed our recent email newsletter or support updates.

https://labjack.com/support/software/examples/ljm/dasylab