How to Build a Secure OPC-UA Server for PLCs in Node-RED • FlowFuse

This article is the second part of a series of OPC-UA content. In part one, we explained some basic concepts of OPC-UA as they apply to building a server in Node-RED, then walked through how to deploy an example OPC-UA Server. In this article, we will build on the foundation of our previous article and create a fully custom secure OPC-UA Server that creates an information model based on data coming from a PLC.

This is a companion discussion topic for the original entry at

Hi I appreciate your sample here.

But I would like to know how to handle for example a write of one varialble:

For example I have a bool variable from a plc and I would like to set it from my OPC-UA client, how to handle this and sent it the value to the plc.

Kind regards