This chapter gives guidance in implementing common tasks when dealing with data made available over OPC UA PubSub. You achieve these tasks mainly by calling methods on the EasyUASubscriber object. Depending on what you need, see:
Subscribing to Information (OPC UA PubSub)
The features discussed here, or some of them, may not be available in all editions of the product. Check the
Product Editions page for differences between the editions. The trial license has all features enabled (and is limited in period for which it provides valid data), but licenses for specific commercial editions may have functionality limitations.
OPC UA PubSub is a large specification, and not all its parts are commonly used and have the same significance. OPC Data Client implements the parts that are relevant for its purpose. Some parts OPC UA PubSub functionality is not available in OPC Data Client. The parts that are not (yet) available include:
- Publisher and server functionality.
- JSON message mapping.
- AMQP transport protocol mapping.
- MQTT transport protocol mapping.
- Support for message signing and encryption.
- Custom data types.
- PubSub discovery.
- PubSub security key service model.
- Write access to PubSub configuration.
- Parts of PubSub configuration that relate to subscriber configuration.
Most of the OPC UA PubSub examples work with the
OPC UA Demo Publisher that is installed with the product, or can be downloaded separately. It supports Windows, Linux and macOS.
See Also
Examples - OPC UA PubSub
Reference
