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Node-RED: Low-code Programming for Event-Driven Applications

Node-RED is a flow-based programming tool for wiring together hardware devices, APIs, and online services as part of the Internet of Things. It provides a browser-based editor that makes it easy to wire together flows using the wide range of nodes in the palette.

JavaScript
Added on 2025年6月28日
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Node-RED: Low-code Programming for Event-Driven Applications preview
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Project Introduction

Summary

Node-RED is a powerful open-source low-code programming tool designed for easily handling event-driven applications and connecting diverse systems using a visual programming approach. Built on Node.js, it enables users to wire together 'nodes' to create complex flows for data manipulation, integration, and automation.

Problem Solved

Connecting different systems, devices, and APIs together often requires significant coding effort and deep technical knowledge of multiple technologies. Node-RED simplifies this process through its visual, flow-based approach, dramatically reducing development time and complexity for integration tasks.

Core Features

Visual Programming Editor

Intuitive browser-based flow editor for easily connecting devices, services, and APIs.

Rich Palette of Nodes

A vast library of contributed nodes for connecting to various services, hardware, and protocols, easily installable via npm.

Lightweight Runtime

Lightweight runtime built on Node.js, making it suitable for deployment on low-cost hardware like Raspberry Pi as well as in the cloud.

Tech Stack

Node.js
JavaScript
HTML
CSS
npm

Use Cases

Node-RED's flexibility makes it suitable for a variety of use cases involving connecting systems and automating tasks based on events:

Home Automation

Details

Connect various smart home devices using protocols like MQTT, automate tasks based on sensor readings, and integrate with voice assistants or web services.

User Value

Simplifies complex home automation setups and allows for custom logic beyond standard off-the-shelf solutions.

Data Processing & Integration

Details

Build data processing pipelines by receiving data from devices or APIs, performing transformations, and sending data to databases, dashboards, or other services.

User Value

Enables rapid development of data ingestion, transformation, and routing logic without complex coding.

Prototyping Web Services

Details

Create simple web services, APIs, or dashboards by wiring together HTTP input nodes, function nodes, and output nodes.

User Value

Accelerates the development of proof-of-concept web services and interfaces.

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