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 type "cmd" in the Windows search bar and press the enter key.

• After you have opened the command line type "node --version" in.

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

• Enter "node-red" and press the enter key to start Node-RED

• 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

Node-RED Tutorial - Part 2

This tutorial will show you how to import Nodes from the Node-RED library into expecco

Preconditions

• Open the testsuite from tutorial - part 1
• Make sure you did the step Specify necessary paths from the first part of the tutorial before you make this part.

Collect Nodes from the Node-RED library

• Click on Operations → Collect List of Nodes in Attachment
  • The Node-RED library gets opened in a browser and the names of each node of the library get extracted and saved in the attatchment listOfNodes
  • Hint: Collecting the node names take a few minutes and offers the opportunity for a short coffee break

• Node-RED library

Installing Nodes

• Click on Operations → Install Nodes

• A window opens
  • Enter here the node name node-red-contrib-amazon-echo
  • Hint: If you want to install all nodes which contains e.g. smarthome in their names just enter *smarthome*

• The entered node will be installed
  • Information about the installation can be found in the lower left corner of the window

^

Importing the Node

• Click on Operations → Importing Nodes

• A small window opens
  • Click on the little house icon
  • Navigate to .node-red → node_modules
  • Search in this folder after a folder called node-red-contrib-amazon-echo
  • Select the file index.html, then click OK

• A new folder should have been created
  • Open this folder to see the just generated elementary blocks

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