Your replication of the code then likely has issues. Are you sending the command to the Ganglion that tells it to enter impedance mode?

There is NO direct function in Brainflow to 'automatically' do all the steps to obtain the Ganglion impedance values. My suggestion would be to look at the GUI source code that does this, and attempt

Personally, I had problems with artefacts, unless I had really low impedance on my electrodes. Afraid I can't comment in enormous detail, as I only bought the off-brand Cyton to tide me over a few mon

I can check the impedances on the GANGLION board using OpenBCI GUI for Windows, i do the connection using the dongle.

If you are talking about the impedance check feature in the OpenBCI_GUI, it might be easiest to just use the GUI initially for a few minutes with the Impedance Widget. Then close that and open your Un

errors, railed time series channels, and poor impedance checks on certain channels even though all the electrodes are screwed in all the way. Hardware settings and filters are left at default, hopefu

http://wwe.eeginfo.com/research/ElectrodeImpedance.pdf

I have seen similar electrode-impedance matching recommendations. What is the reasoning behind it?

https://eeghacker.blogspot.com/2014/04/openbci-measuring-electrode-impedance.html

Is the impedance of an electrode checked with respect to another electrode? Or is the whole circuit impedance divided by two? Which one of the three combinations do the Cyton and Ganglion use to calcu

In biosensing applications, the most important metric is the skin-electrode impedance. And this is what Cyton and Ganglion report in the GUI and APIs. In general when you see the shorter term "el

I am learning about electrode impedance and have a couple of questions.

A gel free electrode cap is being used. I am using saline to measure the eeg, but I see the impedance seen when using a dry electode.

A gel free electrode cap is being used. I am using saline to measure the eeg, but I see the impedance seen when using a dry electode.

You mention 'saline', but electrodes using gel, paste or saline, generally get much lower impedance that what you show. This set of impedance looks more like dry electrodes.

In impedance measurement, the lower the better, but I have tried various things such as twisting the line, changing the line, changing the computer, checking the saline solution, and changing the devi

https://openbci.com/forum/index.php?p=/discussion/2517/expected-impedance-range-with-ultracortex-cyton-resolved

I get an impedance value of around 4500 - 5500 kOhms when conducting an impedance test on the GUI. When I select 'live' instead I am able to get the channels to read 'not railed'. Not sure why the tes

Normally with wet based electrodes (gel, paste, or saline), you want to use wet throughout. You COULD use the ear clips if you moistened a small piece of cloth with the saline, and then clipped it bet

(2) with the same settings, what should be the maximum impedance values for conducting research experiments that are suitable for creating large dataset and publications.