Node-RED

Node-RED is a visual programming environment that lets you build applications by connecting nodes together in a flow. Each node performs a specific task like reading sensor data, sending messages, or controlling devices. You work with a browser-based editor where you drag nodes from a palette and wire them together.

The tool is built on Node.js, which makes it lightweight and event-driven. This means it runs efficiently even on small devices. Node-RED supports many communication protocols used in industry like MQTT, Modbus, and OPC-UA. It also connects with popular services, databases, and APIs.

Because it is open source and free, anyone can use it, modify it, and share their work. There is a large community creating thousands of additional nodes you can install to extend functionality.

Getting started with Node-RED is straightforward:

• Install Node-RED on your computer, cloud server, or edge device. You can run it on Windows, Mac, Linux, or Raspberry Pi. Many industrial devices come with Node-RED already installed.

• Open your web browser and go to the Node-RED editor, usually at http://localhost:1880.

• Drag nodes from the left panel onto the workspace. Common starting nodes include inject nodes for triggering flows and debug nodes for viewing output.

• Connect nodes by dragging wires between their connection points to create your data flow.

• Double-click any node to set its properties and customize how it works.

• Click the Deploy button to run your flow and see results in the debug panel.

• Use the library to import example flows or install additional nodes from the palette manager to add more features.

• Visual drag-and-drop programming interface

• Over 4,000 community nodes available

• Industrial protocol support (MQTT, Modbus, OPC-UA)

• Built-in debugging and testing tools

• Git integration for version control

• Dashboard and UI building capabilities

• Function nodes for custom JavaScript

• Cloud and edge device compatible

• Real-time data processing

• Open source and completely free