To install, run the following command on Node-RED installation directory (~/.node-red by default) in your Terminal or cmd window. If the node-red folder doesn't exist, run node-red program on cmd/terminal to create it.
$ npm install node-red-contrib-emotiv-bci
or run this command for global installation:
$ npm install -g node-red-contrib-emotiv-bci
After the completion of this step, you should see the Emotiv-BCI nodes visible at the bottom of the nodes list on the left side of the Node-RED interface.