Add built-in module

Node-RED have a global context that can be pre-populated with objects when Node-RED starts. This is defined in the main settings.js file under the functionGlobalContext property.

For example, the built-in os module can be made available to all functions:

functionGlobalContext: {
  osModule:require('os')
}

at which point, the module can be referenced within a function as global.get('osModule').

If any external module is "required", it must be installed manually in the user directory via npm.

cd ~/.node-red
npm i name_of_3rd_party_module_to_be_required

Update settings.js in Comongate

1. Open settings.js available in path ./comongate/usr/node-red/
2. Search functionGlobalContext
3. Add your module reference as below

Manual NPM installation in Comongate node-RED

1. Connect to portainer https://comongate_address/portainer/
2. Log in as admin user

3. Access to Containers

4. Click on shell >_ of the Node-RED container

5. Connect in Node-RED shell with Connect button

6. The shell is connected in the right place, just send the command npm i name_of_3rd_party_module_to_be_required

7. Click on Disconnect, go to containers details and restart Node-RED container

8. Node-RED is still ready for using your module

You can call your module inside Node-Red function with this syntax:

var os = global.get('osModule')