PMSWPF

OPC UA Service

This project includes an OPC UA service implementation that provides the following functionalities:

Features

• Connect to OPC UA servers
• Browse nodes in the OPC UA address space
• Read and write values from/to OPC UA nodes
• Add subscriptions for monitoring node changes

Usage

// Create an instance of the OPC UA service
var opcUaService = new OpcUaService();

// Connect to an OPC UA server
await opcUaService.CreateSession("opc.tcp://localhost:4840");

// Check connection status
if (opcUaService.IsConnected())
{
    // Browse nodes
    var rootNodeId = ObjectIds.RootFolder;
    var references = opcUaService.BrowseNodes(rootNodeId);
    
    // Read a value
    var value = opcUaService.ReadValue(someNodeId);
    
    // Write a value
    opcUaService.WriteValue(someNodeId, newValue);
    
    // Add a subscription
    var subscription = opcUaService.AddSubscription("MySubscription");
}

// Disconnect when done
opcUaService.Disconnect();

Testing

Unit tests for the OPC UA service are included in the DMS.Infrastructure.UnitTests project. Run them using your preferred test runner.