nml-wtf-mindrove 1.0.6

NML MindRove EMG tools, GUI apps, real-time decoding, and vendored MindRove Python drivers.

MindRove-EMG

For the EMG wristband from mindrove. See NML-GUI section for Quick Start instructions. For post-processing recordings in MATLAB, see the MATLAB section. Recommended Python version 3.10!

Installation (using pip)

This repository can be installed as a Python package using an editable install. This makes it easy to develop, modify source files, and immediately test changes without reinstalling. To simply use this package in another project, you can add it to requirements.txt as nml_wtf_mindrove. To install directly via pip from CLI, use:

pip install nml-wtf-mindrove

1. Clone the repository

Using SSH:

git clone [e-mail]:Neuro-Mechatronics-Interfaces/MindRove-EMG.git
cd MindRove-EMG

If you do not have SSH keys configured, you can also use HTTPS:

git clone https://github.com/Neuro-Mechatronics-Interfaces/MindRove-EMG.git
cd MindRove-EMG

2. Create and activate a virtual environment

Windows

Note: Python 3.12 will give you headaches with the pyqtgraph package, stick to 3.10 to be safe!

py -3.10 -m venv .venv
.venv\Scripts\activate

Linux/macOS

python3 -m venv .venv
source .venv/bin/activate

Your terminal prompt should show:

(.venv) C:\Your\Local\Project

3. Install the repository in editable mode

From inside the repo:

pip install -e .

This installs the package under the name:

nml_wtf_mindrove

All Python modules under nml/, mindrove/, and mindrove/ are now importable. Assets in assets/, lib/, and configurations/ are included automatically. Note that this includes static compiled libraries for ViGEM, which were built on a Windows-11 64-bit OS. ViGEM is built to run on Windows (so any GamepadController etc. that uses it, won't work on other platforms).

4. Run the main GUI application

python app.py

You can also import modules anywhere inside the same virtual environment:

from nml.application import Application

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Starter Scripts

If you installed via pip from PyPI, then after pip install nml-wtf-mindrove, you can test the install using a couple of scripts. First, make sure your band is on and connected to your computer via WiFi. Then, from the same terminal:

nwm-gui

This will launch a stream GUI with a view different interfaces you can click through as well as ways to save/log data.

nwm-demo-latch

This uses ViGEM to emulate an XBOX controller at kernel level on windows, which presses the A button when you flex, latching the assertion state and toggling it again when you flex again. There is a directional option from the combo box which then should only exit the asserted state if you flex in the opposite direction of the assertion.

nwm-demo-stretch

This has the same interface as nwm-demo-latch but has continuous decode outputs meant to connect via LSL to a receiver that controls a stretch robot in the lab.

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Installation (without pip)

Make sure you have your ssh key added to your GitHub account, and your ssh-agent is running in your local terminal environment.

git clone [e-mail]:Neuro-Mechatronics-Interfaces/MindRove-EMG.git && cd MindRove-EMG && .venv/Scripts/activate

Depending on your installed version of venv / Python, the ./.venv/Scripts/activate command may change slightly (it will also depend on what your terminal environment is).

• Note: if you have successfully activated the virtual environment, then your terminal should say (.venv) now.

Quick Start

Use the main app.py as an entry point:

python app.py

Compiling Libraries

If you need to compile the ViGEm libraries used by the Python API, you'll first need to download and install ViGEmClient from GitHub. Once you've compiled the libraries, you can compile from a MSVC Developer Command Terminal (I used MSVC 2022 but theoretically other versions should work). Use a comand like the following (note that this assumes you cloned ViGEmClient to C:\MyRepos\Libraries\ViGEmClient, that you built using CMake in C:\MyRepos\Libraries\ViGEmClient\build, and that you compiled the resulting Visual Studio Solution ALL_BUILD solution in Release mode):

cl /LD /I"C:\MyRepos\Libraries\ViGEmClient\include" /MD "src\vigem_gamepad.c" /Fo"lib\vigem_gamepad.obj" /Fe"lib\vigem_gamepad.dll" /link /LIBPATH:"C:\MyRepos\Libraries\ViGEmClient\build\Release" ViGEmClient.lib Setupapi.lib User32.lib

ViGEm Button Mapping Quick Reference

The hex code integers in the right column are bit masks for the corresponding button-press in the left column. The encoding/decoding of these masks can be handled by nml.vigem.ViGEmEnum static encode and decode methods, respectively.

Button	Code (Hex)
A	0x1000
B	0x2000
X	0x4000
Y	0x8000
LB	0x0100
RB	0x0200
Back	0x0020
Start	0x0010
Left Thumb	0x0040
Right Thumb	0x0080
D-Pad Up	0x0001
D-Pad Down	0x0002
D-Pad Left	0x0004
D-Pad Right	0x0008
ALL	0xFFFF

Use

After you install the MindRove SDK (the --recurse-submodules step in first line of installer instructions above), and activate your virtual environment (the third line in the installer instructions above)/install pip dependencies, you can use these preliminary tools.

Realtime Stream/Record

This will make squiggles for EMG channels play on the screen, assuming you've correctly connected to the device via Wi-Fi after turning it on.

python realtime_plot.py --file my_data.bin

TSV Log Structure

Based on the saved data structure, the channels probably are mapped something like this:

Column Index (0-indexed)	Data Type
0-7	EEG/EMG Channels
8-17	Resistance Channels
18	Battery
19	Beep (1), Boop (2)
20-22	Accelerometer
23-25	Gyroscope
26	Counter
27	Timestamp
28	Markers

NML GUI

To run the main NML GUI, use:

python app.py

If you plan to re-open a bunch of times and want to set the default subject stub in the filename, you can specify the file option, e.g.

python app.py --file=max --suffix=4

This example would default the filename textbox to data/max_2025_02_19 (as of writing this on 2025-02-19). The suffix (appended at end) would default to 4.

You can set the desired filename, and whether to save streamed data using the checkbox on the main interface.
To open the stream windows and see signals, click the button on the left middle part of the main GUI. Once you click this button, the game button for "Arrows" will be enabled. You can click this button to populate a prompt game with 4 directional arrows, which will start when you click the "Start" button and end when you click the "Stop" button. Event codes related to this game are on Markers (0-indexed) column 28 as described in the next section.

Synthetic Mode

To run synthetic data streams without any device, the default settings will change the board to sample at 250 samples/sec (with the EMG board the default is 500 samples/sec). It also changes the channel scalings/and labels slightly, which is partially accounted for in the GUI but not completely. However it can still be useful to use the synthetic board for test/development purposes. This can be done as follows:

python app.py --synth 1

Currently, the GUI is not configured to handle playback from previous data files.

Event Codes

Event	Code
Up Arrow Shown	2
Right Arrow Shown	3
Down Arrow Shown	4
Left Arrow Shown	5
Rest	6
Up Key Press	7
Right Key Press	8
Down Key Press	9
Left Key Press	10
Direction Game Start	11
Direction Game End	12
Pac-Man Game Open	13
Pac-Man Level Start	14
Pac-Man Pellet Consumed	15
Pac-Man Died	16
Pac-Man Consumed Powerup	17
Pac-Man Consumed Ghost	18
Pac-Man Level Clear	19
Pac-Man Level Up	20
Pac-Man Level Stop	21
Real-Time Plot Marker-0	30
Real-Time Plot Marker-1	31
Real-Time Plot Marker-2	32
Real-Time Plot Marker-3	33
Real-Time Plot Marker-4	34
Real-Time Plot Marker-5	35
Real-Time Plot Marker-6	36
Real-Time Plot Marker-7	37
Real-Time Plot Marker-8	38
Real-Time Plot Marker-9	39
Real-Time Rest Calibration Click	40
Real-Time Rest Calibration Start	41
Real-Time Rest Calibration End	42
Real-Time Threshold Calibration Click	43
Real-Time Threshold Calibration Start	44
Real-Time Threshold Calibration End	45
Fitts-Task Start	50
Fitts-Task Trial Start	51
Fitts-Task Move	52
Fitts-Task Rest	53
Fitts-Task Trial Complete	54
Fitts-Task Stop	55
Covariance-State Changed to 0	60
Covariance-State Changed to 1	61
Covariance-State Changed to 2	62
Covariance-State Changed to 3	63
Covariance-State Changed to 4	64
Covariance-State Changed to 5	65
Covariance-State Changed to 6	66
Covariance-State Changed to 7	67
Covariance-State Changed to 8	68
Covariance-State Changed to 9	69
WebSocket Message	1024 + [message_value: in range 0-256]
UDP State Message With Invalid "Value"	2047
UDP State Message	2048 + [message_value: in range 0-512: Default is the Counter value rem(sampleCounter,512) where sampleCounter is the latest sample counter value from SAGA-A]

• About WebSocket Messages: This is set up to make it easy to send game-keyed values from web-hosted Javascript tasks (like Max's https://reaction-task.nml.wtf "games"), via WebSocket interface if the MindRove band is running the main nml.application interface on the same device hosting the web task. Briefly:

  • Basic Reaction-Task: Codes are task states, which range from values of -3 to +4. The values are shifted over by adding 1027 to them before the transmission, so a received value of 1024 would correspond to Basic Reaction-Task state value of -3. A value of 1032 is sent at the beginning of this task and a value of 1033 is sent at the end of the taks. States are keyed as follows:

    • TIMEOUT (-3) = 1024
    • IDLE (-2) = 1025
    • READY (-1) = 1026
    • WAIT_ASSERTION_CUE (0) = 1027
    • WAIT_ASSERTION_REACTION (1) = 1028
    • WAIT_DEASSERTION_REACTION (2) = 1029
    • HOLD_ASSERTION (3) = 1030
    • DEBOUNCE (4) = 1031

  • About UDP State Messages: These are meant to synchronize acquisition loops in MATLAB (e.g. using Max's TMSi dual interface for poly5 acquisition) with the MindRove records.

MATLAB

In the MATLAB folder, there is an enumeration class (MindRoveCode) and a few utility functions for reading and plotting saved recordings. The main thing you might want to change in these utilities is options.InputRoot in the plot_mindrove_features.m file--it should default to the local relative path for data files but if you have saved your data elsewhere then you should update this option to make reading it easier.