Openbci_gui: Ganglion Impedance Not working(?)

Created on 9 Jan 2019 · 29Comments · Source: OpenBCI/OpenBCI_GUI

Problem

Multiple users say that they get data from Ganglion, but impedance check is not returning results. See:

https://openbci.com/forum/index.php?p=/discussion/1919/ganglion-impedance-check-not-functioning

This is not producing a Java error like issue #209. But does seem likely that the problem is in the GUI or Hub.

Expected

Impedance values to be shown.

Operating System and Version

? macOS/Windows/Linux

GUI Version

? The version is displayed on startup.

Running standalone app

Are you running the downloaded app or are you running from Processing 3

Type of OpenBCI Board

Ganglion

Are you using a WiFi Shield?

OpenBCIHub Related backend bled-112 related priority-high

Source

wjcroft

Most helpful comment

Hey guys I wanted to add to this issue with a small video capture we made. There was some discussion on the forum that a newer version of OpenBCI Hub would fix this problem. Curious if anyone has any update from my view this was fixed in February with v2.05. I ran the most recent version and as you'll see from the video below we were unable to check impedance. Does anyone have any insight? The YouTube video is shown below

alapo on 6 Jun 2019

👍2 🚀1

All 29 comments

I don't see this error when running the current _master_ or _dev_ branch 4.0.3.

retiutut on 9 Jan 2019

Me too :-)
However I remember there is an error of 2 (Ganglion) in displayed resistance value but this may depend on the circuit. (differential or single ended). I do not know if there is a resistor network proposed how to test the impedances.

jps2000 on 9 Jan 2019

I have confirmed the same phenomenon.
However, this phenomenon has been confirmed only when BLED 112 dongle is used.
Also, when I connect with Ganglion using CSR dongle, impedance can be measured without problems.

here is the environment of Gui, hub I use.
GUI v 4.0.4
Hub v2.0.5

Otemo on 3 Feb 2019

@Otemo, thanks for the details! Can you provide a screenshot also? You can take a screenshot of the GUI using lowercase 'm'.

retiutut on 3 Feb 2019

@retiututm, thank you!
I will show you screenshots.

BLED 112 dongle
https://drive.google.com/file/d/1uWV4fuKvC4t9PBPNJfIO1gwFpkJfRYe6/view?usp=sharing

CSR 4.0 dongle
https://drive.google.com/file/d/13GzTWZ_u0DHLjUr_WrBTSI9_BazLuv_i/view?usp=sharing

Otemo on 3 Feb 2019

https://drive.google.com/file/d/1uWV4fuKvC4t9PBPNJfIO1gwFpkJfRYe6/view?usp=sharing

@Otemo @jps2000 I have replicated the error above using GUI v4.1.0 and the BLED 112 Dongle for Windows 10 and OS X Mojave.

This is not producing a Java error like issue #209. But does seem likely that the problem is in the GUI or Hub.

@wjcroft is quite correct!

@daniellasry @produceconsumerobot This feature was working for built-in bluetooth on Mac, when I switched to using the BLED 112 Dongle, it broke. So this could possibly be a simple error in the Hub.

retiutut on 12 Feb 2019

👀1

Same Issue here on Windows Machine

nitinvasanth on 15 Mar 2019

👍1

Same for me

Ordepedro on 29 Mar 2019

Looking into this issue today!

retiutut on 1 Apr 2019

For now, it looks like there is an issue in the NodeJS Ganglion driver related to BLED112.

retiutut on 1 Apr 2019

alapo on 6 Jun 2019

👍2 🚀1

It seems that this problem has not been solved yet. I hope to resolve this issue as soon as possible.

Otemo on 6 Jun 2019

👍1

For now, it looks like there is an issue in the NodeJS Ganglion driver related to BLED112.

If anyone else wants to try a fix before me or Daniel have a chance, that's likely where the issue is.

The NodeJS Ganglion driver is part of the Hub. I can prioritize this issue.

retiutut on 6 Jun 2019

👍2

Could someone please tell me where is the documentation about the impedance check firmware?

EFilomena on 6 Jun 2019

FIXED! 🔥 🔥 🔥

The BLED112 needs up to two seconds to send the ImpedanceStart() command and get a real success message.

Modified in the OpenBCI_Hub code directly using simple setTimeout:

const _processImpedanceGanglion = (msg, client) => {
  switch (msg.action) {
    case kTcpActionStart:
      setTimeout(() => {
        console.log('start impedance check');
        ganglionBLE
          .impedanceStart()
          .then(() => {
            ganglionBLE.on(
              k.OBCIEmitterImpedance,
              impedanceFunction.bind(null, client)
            );
            writeCodeToClientOfType(
              client,
              kTcpTypeImpedance,
              kTcpCodeSuccess,
              {
                action: kTcpActionStart
              }
            );
          })
          .catch(err => {
            writeCodeToClientOfType(
              client,
              kTcpTypeImpedance,
              kTcpCodeErrorImpedanceCouldNotStart,
              {
                message: err.message
              }
            );
          });
      }, 2000);
      break;
    case kTcpActionStop:
      setTimeout(() => {
        console.log('stop impedance check');
        ganglionBLE
          .impedanceStop()
          .then(() => {
            ganglionBLE.removeAllListeners(k.OBCIEmitterImpedance);
            writeCodeToClientOfType(
              client,
              kTcpTypeImpedance,
              kTcpCodeSuccess,
              {
                action: kTcpActionStop
              }
            );
          })
          .catch(err => {
            writeCodeToClientOfType(
              client,
              kTcpTypeImpedance,
              kTcpCodeErrorImpedanceCouldNotStop,
              {
                message: err.message
              }
            );
          });
      }, 2000);
      break;
  }
};

retiutut on 6 Jun 2019

👍1

Hi retiutut, Thank you very much for your immediate solution to this issue.

Otemo on 7 Jun 2019

🎉1

Hub version pushed to 2.0.9 and a PR has been made. Closing this issue! Fix has been tested on two Macs and one Windows machine.

retiutut on 7 Jun 2019

Hub version pushed to 2.0.9 and a PR has been made. Closing this issue! Fix has been tested on two Macs and one Windows machine.

Thanks for your help @retiutut I am not very familiar with building from source. Would you have a compiled version to share until 2.0.9 gets released? We want to get this working to run some tests before spending 10K on the larger Cython board.

As I understand it I would simply copy/paste the OpenBCI_Hub files into OpenBCI_GUI/data/OpenBCIHub directory. Correct?

If you arent able to share the files, when do you think 2.0.9 will get released?

Thanks again.

alapo on 10 Jun 2019

👍1

That's correct! Check https://github.com/OpenBCI/OpenBCI_Hub/releases tonight or tomorrow! We will get 2.0.9 packaged and released!

retiutut on 10 Jun 2019

🎉1

I'm still not seeing impedence. Using Windows 10, BLED112, Ganglion, OpenBCI GUI beta 4.1.3, Hub 2.0.9.
One gold cup lead attached with paste, one reference lead and one ground lead (on each ear).

Video capture:
https://youtu.be/KLOC0MuslHg

ElliotMebane on 13 Jul 2019

👍1

Happens in standalone, not happening when I run the Hub using VSCode.

ganglionimpedancecheck

retiutut on 13 Jul 2019

Working in standalone in Mac

retiutut on 13 Jul 2019

Working again on Windows!!!!

Fixed by doing the following:

Test on Mac first - No problems
Deleting my clone of the Hub repo on Windows machine
npm install and npm install -g npm
npm run release
run the newly built Hub from the build folder
run the GUI without auto-launching the hub
WORKS
place Hub in the GUI folder and try again
WORKS
Remake OpenBCI GUI on Windows with fresh Hub and test fresh standalone
WORKS
Upload fresh windows 4.1.3-beta.3 64/32bit apps to release page
For good measure: Update the OpenBCIHub 2.0.9 windows release

Updating the windows build for 4.1.3-beta.3 now

retiutut on 13 Jul 2019

@ElliotMebane Please try the updated 4.1.3-beta.3 release, it is uploading now. It should work for you.

https://github.com/OpenBCI/OpenBCI_GUI/releases/tag/v4.1.3-beta.3

retiutut on 13 Jul 2019

Yes, it's working. Thanks!

ElliotMebane on 14 Jul 2019

👍1

Hey I just uploaded the version with a signed 64bit Hub and signed 64bit GUI for Windows. I also had to make sure the 32bit windows GUI has a 32bit Hub.

retiutut on 14 Jul 2019

I'm not sure if your comment about just uploading the new version was a response to my test.

More details: My successful test uses the Windows 64 bit: v4.1.3-beta.3 downloaded from this link a few minutes before reporting my success:
https://github.com/OpenBCI/OpenBCI_GUI/releases/download/v4.1.3-beta.3/openbcigui_v4.1.3-beta.3_windows64.zip

It was date stamped "2 days ago" but I tried anyway.

To confirm, in the GUI I go to Update and see:
Local: v4.1.3-beta.3 GitHub: v4.1.2.

I left the hub as it was before, 2.0.9.

ElliotMebane on 14 Jul 2019

👍1

Just wanted to make sure you get a copy with the Signed Hub. I had uploaded a fix earlier without signing it. 4.1.3-beta.3 is good to go now. Let us know if you notice anything before we make a stable release!

retiutut on 14 Jul 2019

OK. Well, I don't know if the GUI package I downloaded tonight includes the new signed Hub or if the 2.0.9 hub I am running is a result of the Hub I installed yesterday directly from the Hub repo. If you'd like me to uninstall/reinstall/test anything let me know how I can help. Otherwise, what I have is working.

ElliotMebane on 14 Jul 2019

👍1

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