Node-RED Q & A
Node-RED Questions and Answers. Node-RED is a flow-based (visual) programming tool. These pages have some information that may be currently missing from the documentation or may expand on it.
See the Node-RED website for more details about it. There are also sites for custom nodes and example flows, documentation, a blog and a discussion forum. There is also a Slack group. You can also find some questions and answers on StackOverflow.
Just as there are several possible ways to run Node-RED, there are several ways to access the log.
There are several possible ways to install Node-RED, this post provides an overview and some thoughts about when you might want to use which approach.
There are all sorts of reasons to want to run more than a single instance of Node-RED and several ways to do it.
For those not used to it, the terminology used in Node-RED can occasionally be confusing. Due in part to the overloading of some terms. So I’ve come up with this glossary to help keep myself from getting confused.
There are usually many ways to achieve something in Node-RED. A common question is whether or when to use a function node or a collection of core nodes to achieve an outcome.
JSONata is a syntax designed by IBM to help reformat and restructure JSON data in a similar vein to the way that XLST is used to transform XML data.
Node-RED’s admin UI has a built-in notification (toast) pop-up message feature. This article explains how to use it when creating custom nodes as it isn’t currently well documented.
Node-RED uses npm to manage package installations such as its nodes. Sometimes, you can get into a situation where you start getting lots of npm installation or removal issues and it feels like you are going round in circles trying to fix things. If so, time to call it a day and to get drastic! Here, I try to explain an easy way to fix things quickly and completely without side effects.
Node-RED is a powerful platform for prototyping and rapid development but it is complex. It has a lot of moving parts and it can be hard to know what might be causing performance bottlenecks. This article tries to give some hints and tips about analysing those bottlenecks and how to resolve them.
Node-RED allows us to create custom nodes to extend the features. While this is a great feature, actually writing the code can be tricky. In part because the code for the admin configuration panel is contained in an html file containing 3 script entries that are Node-RED specific. This post shows you a relatively easy way to split that into 3 files and combine them with a build step using an npm cross-platform script.
Generate certificates for Node-RED that are trusted by all modern browsers. This will let you access Node-RED (and other services) over an encrypted HTTPS link.
Node-RED is increasingly used in situations that require reasonable security. Up to now, however, the information required to secure it correctly has been fragmented. This article aims to give an end-to-end outline to enable anyone to secure their installation.
📖 Kb | 📎 Development, Internet of Things (IoT) | 🔖 node-red, internet of things, iot, heating, home automation
Drayton are a very widely used manufacturer of heating controls. They make the “Wiser” control system which is low cost and easily fitted. This article shows you how to use Node-RED to query and control the system.
Excellent work has been done to make sure that new nodes are discoverable. Here is a quick way to easily search from your browser.
Node-RED tried to pass messages by reference not copy. Sometimes though, a copy is needed.