Wifi: "no module connected" / default sample rate / Daisy usage

laerciosilvajuniorlaerciosilvajunior Brazil
edited September 2017 in Wifi Shield
Hi. I'd like to solve some problems that I had and ask some questions.

I
have tried to use the Wifi Shield with my Cyton board. I have set up
everything related to the network connection and when I use the
OpenBCI_GUI interface it's possible to find the Wifi Shield, but there
is message written that there is no module connected. Everything is
turned on accordind to the tutorial on the website, all the leds are ok
as well. What is the problem? Has someone had the same problem?

Other questions:
- The sample rate is 1000HZ using the Wifi Shield?
- Is it possible to use the Daisy Module? If yes, what is the sample rate?

Comments

  • wjcroftwjcroft Mount Shasta, CA
    Mentioning AJ @pushtheworld.
  • pushtheworldpushtheworld
    edited October 2017
    Hey did you update your Cyton firmware?

    Other questions:
    - The sample rate is 1000HZ using the Wifi Shield?
    The sample when using the GUI is 1000Hz, the cyton can do various other sample rates too.
    - Is it possible to use the Daisy Module? If yes, what is the sample rate?
    1000Hz on Daisy with as high as 20ms latency shall work 

  • pushtheworldpushtheworld
    No module connected means that no master device, the Cyton here, has polled the WiFi Shield. The Cyton polls the WiFi shield every 20ms to ask for data.

    This generally means that:
    1. Cyton or Ganglion firmware is outdated and must be updated
    2. If firmware is correct, then this can be from the wifi shield not being properly power on reset by the cyton. A power cycle should fix this. 

  • laerciosilvajuniorlaerciosilvajunior Brazil
    Hi @pushtheworld and @wjcroft.

    thank you for your answers.

    I have installed the newest version of the firmware and it worked! I still need to test the daisy module to verify the sample rate. As soon as possible I'll tell if it worked
  • pushtheworldpushtheworld
    laerciosilvajunior i'm happy to hear you were able to resolve the issue! Good luck! The Daisy module should be working fine now :)
  • rajaraja
    Hi @pushtheworld and @wjcroft.
    I tried the wifi shield with cyton board and daisy
     for some reason 8 channels from cyton boards the data is streaming at 1000hz
    but from the daisy channels I am getting data only at 250hz , I am using the GUI to record data.
    Is there something i might not be doing.
    raja

  • pushtheworldpushtheworld
    Whoa no that's not good! Sounds like a bug! Can you post why you think you're streaming at 250Hz. I'd say make sure to have the 1000Hz selected in the config window shown before connection to system is made.
  • rajaraja
    When i review the data , I am  getting daisy data(16 channel data)  only after every 3 readings of the cyton data(8 channel data)
    for eg

    I am getting  

    line 1 - 16 channel data
    line2 - 8 channel data
    line3 - 8 channel data
    line4 - 8 channel data
    line 5 - 16 channel data
    line6 - 8 channel data
    line7 - 8 channel data
    line8 - 8 channel data
    line 9 - 16 channel data

    I made sure the config is  set at 1000Hz

    (%OpenBCI Raw EEG Data
    %
    %Sample Rate = 1000.0 Hz
    %First Column = SampleIndex
    %Last Column = Timestamp 
    %Other Columns = EEG data in microvolts followed by Accel Data (in G) interleaved with Aux Data)

    any ideas why?
    raja
  • pushtheworldpushtheworld
    I bet this is actually good data but is not being written correctly. Can you open an issue:

    https://github.com/OpenBCI/OpenBCI_GUI/issues/new

    Please upload your saved data on the issue.
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