Node: msg.payload msg.payload : undefined

General
1

Hi, I'm testing node red and I've created a signal called data from the prosys server, and I've connected it to this client, but I don't know why it doesn't read the number value. It detects the message but tells me: node: msg.payload msg.payload: undefined, so the value doesn´t appear in the client, as you can see in the following picture.

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It also appears a warning saying: msg : string[26]
"userIdentity is ANONYMOUS ", and I don´t understand why because when I created the OPC UA Client in node red, I didn´t put the anonymous clicked as you can see, and in the prosys neither.
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I´ve tried in UaExpert which is another different cliet, and in that client it works and appears the value and it updates itself every time, so I guess it´s a node red problem.

Thank you in advance, I´m really new so I don´t know how to fix it

2

Welcome to the forum @lidia.

Try changing your debug node to show the complete message object. There may be clues in the overall message structure.

I don't know where the warning comes from, but if msg is a string as it says, msg.payload is indeed undefined.

3

Thanks,i did what you say about showing the complete message and it appears this: {"error":null,"endpoint":"opc.tcp://ESVLCP-13KVW33.CorpDSB.com:53530/OPCUA/SimulationServer","status":"active reading","_msgid":"bccd989d863a8c11"} ?????

4

So there is no msg.payload.

Look in the documentation for your opcua nodes.
There may be something significant in the client node having 3 outputs while you are only wired up to the centre one.

5

I did it like that because of this video: OPC UA - Initiation - Les bases pour débuter avec Démo PROSYS Simulation / UA-EXpert / Node-RED , and it works for him tha´s why I´m confused it should be working

6

Read the side bar built in help - what does it say about the outputs? Alternately, add full debug nodes to all the outputs and see what you get?

7

The opcua client node in that video only has one output, yours has 3, it may be from a different set of contributed nodes.

Looking at Library - Node-RED, there are a few opcua nodes but by far the most popular seems to be node-red-contrib-opcua.
Which nodes did you install?

And as Steve says, connect all 3 outputs to debug nodes to scrutinise the outputs.