Ganglion count-up of "Sample Index" values

ftaroftaro Japan
edited September 15 in OpenBCI_GUI

I would like to know about the data recorded by the OpenBCI GUI.
I have confirmed that the "Sample Index" counts up from 0-100, and then starts counting again from 0.
However, the count up is increasing by two, 1,1,2,2,2,3,3,3,4,4.
I tried moving the dongle closer to the board, but it didn't change.
Do you know the cause?


  • wjcroftwjcroft Mount Shasta, CA

    Hi Ftaro,

    This is normal. If you view the radio packet structure of Ganglion, you can see that the sample rate is 200 Hz. But two samples are sent per packet. So the packet rate is only 100 Hz.



  • Hi William,
    Thank you for your answer.
    I see that the behavior is specific to Ganglion board.
    I have solved the problem.

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