Node-RED comes with a core set of useful nodes, but there are a growing number of additional nodes available for install from both the Node-RED project as well as the wider community.

You can search for available nodes in the Node-RED library or on the npm repository.

To install an npm-packaged node, you can either install it locally within your user data directory (by default, $HOME/.node-red):

cd $HOME/.node-red
npm install <npm-package-name>

or globally alongside Node-RED:

sudo npm install -g <npm-package-name>

You will need to restart Node-RED for it to pick-up the new nodes.

It is also possible to install nodes by copying their .js and .html files into a nodes directory within your user data directory. If these nodes have any npm dependencies, they must be also be installed within the user data directory.