Hi,

I’m trying to set up my WinCC RT Unified V18 application as a OPCUA server. 

I managed to get it to work with UaExpert. I'm now trying to set it up with nodered(node js version 18 and node red v3.0.2) both locally(for testing only) and in a separate IOT device(IOT2050). however, it is giving invalid endpoint error (node-red-contrib-opcua-0.2.339).

I suspect this has something to do with certificate because I struggled with UAExpert client on this. It did not automatically get generated in the rejected or trusted folder. I had to manually transfer it from UaExpert. I'm not sure how to do this in a debian/nodered setup. 

Additionally, if possible to setup wincc RT unified to allows no security mode/policy? This way I dont need a certificate. I watched this video(https://www.youtube.com/watch?v=shQFuXEK2Gc) but the content of the OpcuaServerRTIL.xml file much different than mine to edit. So im not sure how to do this.

Please assist. 

thank you

Im able to now communicate from WinCC Unified OPC UA to node red opcua client. I think I missed the step  to manually trust the certificate in Simatic Runtime manager as you mentioned earlier. In Wincc 18, I think no certificate will be generated in the trust/rejected of PKI folder.

thank you