abek42 / nodeLSL

Node Bridge for LabStreamingLayer

##nodeLSL - Node Bridge for LabStreamingLayer

###Is this implementation for you? It is, if you:

• Have built node.js apps before
• Want to use a LSL-compatible device with node.js
• Want the implementation which is Java-lite and node-heavy (yet, async and non-blocking)
• Are a Java beginner/non-expert (some instructions below are written with non-experts in mind)
• At its core, nodelslserver uses node-java and a custom LSLWrapper class to port the functionality provided by LSL (the important bits?) and forwards the LSL Stream as json packets over websockets using promises to allow non-blocking async operation.

###Install instructions:

See IntallStep.md

###Usage

1. nodelslserver.js : Accepts command line arguments, run with -help flag for more details. It can record an incoming stream for later reuse by nodelslplayer.js
2. A basic bridge configuration consists of:

• <Your LSL EEG Device> streaming EEG or Quality or Markers streams
• nodelslserver.js recording and transmitting these streams over Websockets on Port 1337
• Visualizer.html available on Port 3000 or directly loaded from folder connected to ws:1337

3. nodelslserver.js can also record streams to plain text files. nodelslplayer.js can replay one stream per instance and replace the LSL EEG Device in the basic configuration above. It also accepts command line arguments e.g. node nodelslplayer -re -n 8 -t 250 -file Sample.txt sends the contents of Sample.txt at 250Hz, 8 channels as EEG data. (Sample.txt should contain tab-separated or comma-separated float values, 8 per line)