Node-RED¶

Node-RED is the gateway's flow-based programming tool — a browser-based editor for wiring together inputs, logic, and outputs ("nodes") into flows, without writing a full application by hand. On this gateway it's the integration layer: pulling data from PLCs (via the installed Modbus nodes), transforming it, and passing it on to wherever it needs to go — including tags in SCADash for visualization.

Reaching Node-RED¶

Open a browser and go to the gateway's IP address on port 1880, for example:

http://192.168.0.157:1880

No login by default

Like SCADash, Node-RED does not require a username and password unless it's been specifically configured to. Anyone who can reach port 1880 can view, edit, and deploy flows — which can read and write to any connected PLC. Treat network access to this port as admin access. Securing it (via Node-RED's adminAuth setting) is a server-side configuration change outside the editor itself, not covered by this manual.

What you can do with Node-RED¶

Build flows that read from and write to PLCs, including RTU devices — see Modbus / PLC integration, or, for Mitsubishi and Siemens PLCs specifically, Mitsubishi MC Protocol and Siemens S7 PLC integration
Run NPU-accelerated computer-vision inference (object detection) on EPG-002S/EPG-004S/EPG-AI — see AI Node
Run an MQTT broker on the gateway itself — see MQTT broker (Aedes)
Wire up logic, transformations, and outputs — see Building flows
Add more node types as needed — see Managing the palette
Adjust editor behavior and appearance — see User Settings

Continue to Getting started for a first look at the editor.