Managing the palette¶
Open the hamburger menu → Manage palette to see what's installed and add more node types:
The Nodes tab lists every installed package. On this gateway:
| Package | Adds |
|---|---|
| node-red (core) | The standard 50 built-in nodes (inject, debug, function, switch, http request, mqtt in/out, and so on) |
| node-red-contrib-aedes | An embeddable MQTT broker node, so the gateway itself can act as an MQTT broker — see MQTT broker (Aedes) |
| node-red-contrib-modbus | The Modbus node set — see Modbus / PLC integration |
Each package can be disabled (disable all) or removed (remove) without leaving the dialog.
Installing more nodes¶
Switch to the Install tab to search the public Node-RED node registry and install additional node types directly from the editor — useful if a project needs a protocol or integration beyond what's here (an OPC UA client, a specific cloud SDK, and so on). For PLCs that don't speak Modbus, this is how you'd add Mitsubishi MC Protocol or Siemens S7 PLC integration support.
Note
Installing a node package requires the gateway to reach the npm registry over the internet. On an isolated plant network, you may need to stage the package another way.