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Creating Nodes

Node-BLUE can be easily extended by creating new nodes. New nodes can be written in four programming languages:

  1. C++
  2. PHP
  3. Python
  4. JavaScript

This guide describes how to write new nodes in each of them. As the Node-BLUE frontend is based on Node-RED, this documentation is largely based on and citing the Node-RED documentation as well.

Please click on the sections you want to read:

General guidance

When developing new nodes, please follow the following principles:

  • Nodes should be simple to use, regardless how complex the underlying functionality is.
  • When a node outputs data, the main information should always be encoded in msg.payload.
  • It should never be required to use a function node in combination with nodes.
  • Nodes should have a good documentation.
  • Errors should always be catched, otherwise they might crash the whole process.


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