Node-RED is a versatile programming tool designed for connecting various hardware devices, APIs, and online services in innovative ways. Featuring a user-friendly, browser-based editor, it allows users to easily create flows by utilizing a diverse array of nodes available in its palette, which can be deployed to its runtime with just a single click. The platform supports the creation of JavaScript functions directly within the editor, enhanced by a rich text editor for ease of use. Additionally, a built-in library is available for users to save and reuse useful functions, templates, or flows, streamlining the development process. Built on Node.js, Node-RED leverages its lightweight runtime architecture, capitalizing on an event-driven and non-blocking model that makes it exceptionally suited for deployment on low-cost devices like the Raspberry Pi, as well as in cloud environments. This flexibility ensures that developers can operate efficiently regardless of the hardware they choose to use.