Difference between revisions of "NodeRED/en"

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* If you haven't installed Node.js yet download and install it here: https://nodejs.org/en/download/
 
* 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.
 
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* Use the command line to verify that Node.js has been installed correctly.
 
** To open the command line enter "cmd" in the Windows search bar and press the enter key.
 
** To open the command line enter "cmd" in the Windows search bar and press the enter key.
   
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[[Bild:install node-red helper.png|500px]]
 
[[Bild:install node-red helper.png|500px]]
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→ Now you have installed everything you need to do the tutorials below
   
 
= Tutorials =
 
= Tutorials =

Latest revision as of 10:07, 11 February 2020

Introduction[edit]

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.

Node-RED nodes.png

Preparations[edit]


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


Command line.png Commandline.png


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


Verify node version.png


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


Verify npm version.png


  • Internet connection available?

Installing Node-RED[edit]

  • Open command line


Commandline.png


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


Install node-red.png


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


Start node-red.png


  • 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


Open Node-RED Editor.png

→ Close the browser and the command line


  • Open a new command line

Commandline.png


  • Navigate to the .node-red folder created by the start of Node-RED
    • Enter "cd .node-red" and press the enter key


Node-red folder.png


  • Enter "npm install node-red-node-test-helper node-red --save-dev" and press the enter key
    • Make sure you are in the .node-red folder


Install node-red helper.png


→ Now you have installed everything you need to do the tutorials below

Tutorials[edit]



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