Understanding the CSV Headers of the new V5 GUI

AlejandroAlejandro Ireland
edited October 2020 in Software

Hi guys!
I've just shifted to the GUI v5 after been working a lot with the v4. I'm quite confused about the new file format, and I couldn't find any documentation on the headers. I normally use the board in different configurations (accelerometer, digital for triggers, and analog for pulse sensing, not all at the same time) .

Here a couple of questions:
1. Is the Accelerometer data now sampled at the same rate as the EEG data using Brainflow? The previous csv files had an accelerometer at reduced rates but now I see Accel Ch 0-1 with continuous data.
2. What does Other to Other 6 mean? on the v4 files I would expected 3 analog channels if the board was configured to analog or 5 digital channels if the board was configured to digital, but now instead there are 7 columns labeld Other that I cannot make sense of (it makes it difficult to update my script if I cannot know which columns are D11,D12, D13 D17, D18 in digital mode or A0 A1 A2 on analog mode)
3. There are the Analog Channels at the end and I believe that is intuitive enough to get it. But when analog mode is selected on the board, there is all sorts of values on the 'Other Columns' that make me wonder what is happening.
4. The first 'Other' Column is always saturated at 192 or 193, what is that about?

I'm attaching a couple of recordings in the different modes for you to see why I'm confused.

Thanks for the explanations of the new file headers!

Comments

  • wjcroftwjcroft Mount Shasta, CA

    Mentioning Richard @retiutut.

  • seventhseraphimseventhseraphim USA

    Any updates on this? I'm trying to learn more about the "other" Chanels and the analogs, but can't find much. Searching the forum for "other" gives no result.

  • wjcroftwjcroft Mount Shasta, CA

    The 'mode' of the 3 Aux channels is set with this SDK command:

    https://docs.openbci.com/docs/02Cyton/CytonSDK#board-mode

    GUI widget(s) allow mode to be set and read out.

    https://docs.openbci.com/docs/02Cyton/CytonDataFormat#binary-format

    https://docs.openbci.com/docs/06Software/01-OpenBCISoftware/GUIWidgets

    https://github.com/OpenBCI/OpenBCI_GUI/tree/master/OpenBCI_GUI
    [see W_DigitalRead, W_AnalogRead, W_PulseSensor, etc.]

  • seventhseraphimseventhseraphim USA

    Perfect, that answers it. Thanks for the quick reply.

  • retiututretiutut Louisiana, USA

    Just now seeing this post.

    I've made an issue to add this to the Docs ASAP.

    https://github.com/OpenBCI/Documentation/issues/56

  • hikinghiking CHINAc

    @Alejandro said:
    Hi guys!
    I've just shifted to the GUI v5 after been working a lot with the v4. I'm quite confused about the new file format, and I couldn't find any documentation on the headers. I normally use the board in different configurations (accelerometer, digital for triggers, and analog for pulse sensing, not all at the same time) .

    Here a couple of questions:
    1. Is the Accelerometer data now sampled at the same rate as the EEG data using Brainflow? The previous csv files had an accelerometer at reduced rates but now I see Accel Ch 0-1 with continuous data.
    2. What does Other to Other 6 mean? on the v4 files I would expected 3 analog channels if the board was configured to analog or 5 digital channels if the board was configured to digital, but now instead there are 7 columns labeld Other that I cannot make sense of (it makes it difficult to update my script if I cannot know which columns are D11,D12, D13 D17, D18 in digital mode or A0 A1 A2 on analog mode)
    3. There are the Analog Channels at the end and I believe that is intuitive enough to get it. But when analog mode is selected on the board, there is all sorts of values on the 'Other Columns' that make me wonder what is happening.
    4. The first 'Other' Column is always saturated at 192 or 193, what is that about?

    I'm attaching a couple of recordings in the different modes for you to see why I'm confused.

    Thanks for the explanations of the new file headers!

    Have you understood the meaning of the new file header, such as which header the D17 pin corresponds to in the digital reading mode? Thank you very much

  • wjcroftwjcroft Mount Shasta, CA

    Richard @retiutut, there are several new posts asking for the format of the CSV file. Can you respond?

  • hikinghiking CHINAc

    @wjcroft said:
    Richard @retiutut, there are several new posts asking for the format of the CSV file. Can you respond?

    Thank you very much for your reply. I have understood all the meanings of the csv file header. The D17 pin is in Other4

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