NodeRED/en

Introduction

Node-RED is a graphical development tool. With Node-RED, use cases for the Internet of Things can be implemented according to a simple modular principle. In Node-RED there are so-called "nodes" which look like as follows. Each node fulfills a certain function e.g. making a HTTP-request.

Preparations

• If you haven't installed Node.js yet download and install it here: https://nodejs.org/en/download/

• Use the command line to verify that Nodejs has been installed correctly.
  • To open the command line enter "cmd" in the Windows search bar and press the enter key.

• After you have opened the command line enter "node --version"

• Also enter "npm --version" in the command line.
  • Hint: npm usually comes with Node.js

• Internet connection available?

Installing Node-RED

• Open command line

• Enter "npm install -g --unsafe-perm node-red" and press the enter key

• Enter "node-red" and press the enter key to start Node-RED
  • Essential step, because this creates the .node-red folder which we need for further steps

• After you have started Node-RED open your browser (Chrome, Firefox, Internet Explorer, ...)
  • Enter "localhost:1880" into the search bar of your browser and press the enter key

• Close the browser and the command line now

• Navigate to the .node-red folder
  • Enter "cd .node-red" and press the enter key

• Enter "npm install node-red-node-test-helper node-red --save-dev" and press the enter key

Tutorials

• Node-RED Tutorial - Part 1

• Node-RED Tutorial - Part 2

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