# Opc ua client - opc ua server

**URL:** https://discourse.nodered.org/t/opc-ua-client-opc-ua-server/101506
**Category:** General
**Created:** [21 July 2026 10:06 UTC](https://discourse.nodered.org/t/opc-ua-client-opc-ua-server/101506 "2026-07-21T10:06:45Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![luigica33](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/luigica33/32/108024_2.png) [@luigica33](https://discourse.nodered.org/u/luigica33)
#### Post date: [21 July 2026 10:06 UTC](https://discourse.nodered.org/t/opc-ua-client-opc-ua-server/101506/1 "2026-07-21T10:06:46Z")

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Hello everyone, I'm trying to create a project on Node Red that reads OPC data from a client and exposes it to an OPC server so it can be read by a SCADA.  
My SCADA reads OPC UA but doesn't see the variables because they're not in a folder. Therefore, I want to use Node Red to read the data from the machine and expose it in a folder so it can be read by the SCADA. This is my first time using Node Red and I can't seem to get it to work. Can anyone help me?

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### Author: ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [21 July 2026 11:32 UTC](https://discourse.nodered.org/t/opc-ua-client-opc-ua-server/101506/2 "2026-07-21T11:32:16Z")

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Hi, welcome to the forum.

There are a few OPC UA nodes in the catalog so you will need to be explicit if you want specific help.

First recommendation - watch the videos (see canned responses below). Tons of clues and cues that will definitely help in your learning.

Then, check the import (`CTRL-I`) → examples - the node package you installed may shp with built-in examples for you to build from!

* * *

I recommend watching this playlist: [Node-RED Essentials](https://www.youtube.com/playlist?list=PLyNBB9VCLmo1hyO-4fIZ08gqFcXBkHy-6). The videos are done by the developers of node-red. They're nice & short and to the point. You will understand a whole lot more in about 1 hour. A small investment for a lot of gain.

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### Author: ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [21 July 2026 12:25 UTC](https://discourse.nodered.org/t/opc-ua-client-opc-ua-server/101506/3 "2026-07-21T12:25:45Z")

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Does your SCADA support MQTT?