# Node-red-contrib-opcua-server

**URL:** <https://discourse.nodered.org/t/node-red-contrib-opcua-server/80134>\
**Category:** Industrial\
**Created:** [28 July 2023 10:45 UTC](https://discourse.nodered.org/t/node-red-contrib-opcua-server/80134 "2023-07-28T10:45:58Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![engrmyan](https://avatars.discourse-cdn.com/v4/letter/e/779978/32.png) [@engrmyan](https://discourse.nodered.org/u/engrmyan)\
**Post date:** [28 July 2023 10:45 UTC](https://discourse.nodered.org/t/node-red-contrib-opcua-server/80134/1 "2023-07-28T10:45:59Z")

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Hello,  
In my Raspberry Pi, I noticed that "CoreServer" is not recignised/defined in "nodered-opcua-server" node. I took example programmed node, but still same error is coming. So, I updated my node-red to version 3.0.2 and node.js to v18.17.0 (which is latest LTS supported version) but still below command "const opcua = coreServer.choreCompact.opcua" is not recognised in address space of "node-red-contrib-opcua-server" node.  
Please help me how I can solve this problem or is there any other node which I can use to send data to ArchestrA (Aveva) System Management Console (SMC) from Node-Red, Node should follow S7 or OPCUA Protocols?

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**Author:** ![tree-frog](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/tree-frog/32/89303_2.png) [@tree-frog](https://discourse.nodered.org/u/tree-frog)\
**Post date:** [15 September 2023 01:45 UTC](https://discourse.nodered.org/t/node-red-contrib-opcua-server/80134/2 "2023-09-15T01:45:34Z")

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I see you posted this in July. Have you had any luck on your own? Write back and let me know if this is still open.  
Thoughts on the subject. OPC-DA and OPC-UA are similar that the "server" offer up tag values to "clients". You should be able to run KEPWARE or the like to create test tags . you should be able to have Node-RED serve tags to your test client and then your test can act as a server to simulate the tag values to your client. This is a typical fashion to debug either the server or clients.

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [14 November 2023 01:46 UTC](https://discourse.nodered.org/t/node-red-contrib-opcua-server/80134/3 "2023-11-14T01:46:23Z")

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