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NodeId in Async read callback.

Curious Mind

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09/05/2018 - 07:20

I am trying to read values from OPC UA server asynchronously. In the callback of the read async, how can i get the details of the NodeId. I get the values read from the server but unable to get the NodeId details namespaceIndex, indentifierType, identifier. Is there any example i can look for.

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Randy Armstrong

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09/05/2018 - 16:11

You need to save that information when you make the call. The server does not return information that the client provided in the request.

Curious Mind

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09/06/2018 - 05:29

Suppose i send request to read 5 values with a vector of 5 NodeIds in the read request, and when i get the response is a vector of 5 DataValue, if the NodeIds are not returned then how to associate DataValue with respective NodeIds?

Randy Armstrong

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09/06/2018 - 10:40