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Decodes QRCode using PureJS.

This node is part of project node-red-contrib-viseo powered by VISEO Technologies. Please find the node documentation in the Node-RED info tab.

Here is a French Article on Bot Ecosystem and more.

Quick Start

npm install node-red-contrib-viseo-qrcode

Build the Node-RED Flow

The qrDecode node

  • retrieve a Buffer or an URL from the given input,
  • if it's an URL, download the Buffer
  • retrieve and decode the Buffer QRCode
  • parse encoded data to a JSON object
  • If data is an URL, convert it's querystring to a JSON object

Best Practices

ZXing webservice can be use to generate a QRCode.

Generated QRCode should contains an URL with parameters.

  • Anyone using the QRCode will be redirected to that URL (that could explain the webservice)
  • Decoding the QRCode will still works

Getting Help

A documentation is available on this Wiki.

For further help, or general discussion, please use the github issue tracker and in order to be labeled with question tag please specify :

  • Your message is a question / discussion
  • The module or node name


This project adheres to the Contributor Covenant 1.4. By participating, you are expected to uphold this code. Please report unacceptable behavior to any of the project's core team.


This project is a creation of VISEO Technology.

Copyright and license

Copyright 2016-2019 VISEO under the Apache 2.0 license. Copyright 2012-2019 SARAH under the Apache 2.0 license.

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