The new version V5.59 of our dataFEED UA C++ SDKs includes a first OPC UA Publisher / Subscriber implementation based on UDP. It fully complies to the OPC UA Specification V1.04. As we have been focussing on the SDK implementation with this release, the OPC UA Publisher / Subscriber sample application will be included in the next dataFEED UA C++ SDK release. In the meantime, please feel free to get in contact with us in case you want to use an OPC UA Publisher / Subscriber sample application. If you are new to the OPC UA Publisher / Subscriber functionality, our extensive documentation allows you to learn all you need to know about this topic.