How to set the OPC source timestamp with writeValue()?

Dear MATLAB community,

I am currently trying to establish a connection between MATLAB's OPC toolbox and a python OPC-UA server (aysncua). When manipulating variables on the server, it is very helpful to provide the local UTC time of the client as a source timestamp.

Apparently, MATLAB does not send a source timestamp when using writeValue(uaClient, node, value), as can be seen in Wireshark:

I tried various things and studied the docs but could not find advice on how to send the current system time. Can anybody give me a hint?

Answer 1

[Martin Kosch]

I found the solution myself: It was no MATLAB issue. Instead, the FreeOpcUa python server I am using does not support setting time stamps.