Smallest imaginable OPC Unified Architecture (OPC UA) client library. Works with any .NET Standard conformant runtime. Does not depend on any OPC UA stack. Create and close sessions (opc.tcp), perform reads and writes, synchronously or asynchronously. No security, browing or subscriptions. Use OpcLabs.QuickOPC instead if you need an advanced, high-level OPC client toolkit.
$ dotnet add package OpcLabs.PicoOpcNo README available.