Networking LSL AvgBandPower: only one band value is sent

[chris-zielinski]

Problem

When using the LSL networking protocol to send the AvgBandPower, the data output is only one single value.

Expected

Like for the other protocol, the expected output should be the 5 avg power value (one per band).
In the W_Networking.pde/sendNormalizedPowerBandData function, the loop across each frequency band is missing for the LSL case.

Operating System and Version

Windows

GUI Version

5.1.0

Running standalone app

downloaded app

Type of OpenBCI Board

Synthetic

Are you using a WiFi Shield?

No

Console Log

Thank you!

[retiutut]

Confirmed using Networking test kit. When this metric was added it was in support of OpenBCI team using UDP. Thanks for bringing this oversight to our attention. We will include the fix in the next version of the GUI.

[retiutut]

Actually the code in sendNormalizedPowerBandData() is fine, since we pass in a single dimension array, which is a valid option for LSL push_sample. What's wrong is the number of channels per sample, which should be 5 instead of 1.

In the screenshot, you'll see that this is now correct with 5 band powers whose sum is 1. The sampling rate is roughly equal to the framerate of the GUI (since that's when updates occur for a derivative metric).

Getting a PR for this in now since it's such an easy fix.