The OPC DA/AE/HDA Client SDK .NET Standard offers a fast and easy access to the OPC Classic Client technology. Develop OPC compliant DA, AE and HDA Clients with C#/VB.NET for the .NET 4.8, .NET 4.7.2 and .NET 4.6.2 framework.

The OPC DA/AE/HDA Client SDK .NET API defines classes which can be used to implement an OPC client capable to access OPC servers supporting different specifications with the same API. These classes manage client side state information; provide higher level abstractions for OPC tasks such as managing sessions and subscriptions or saving and restoring connection information for later use. The lower level API’s for OPC DA, OPC AE and OPC HDA defines classes which can be used to access OPC specification specific methods and properties.

The OPC DA/AE/HDA Client SDK .NET Standard follows a dual-license:

The OPC DA/AE/HDA Client SDK .NET Standard is licensed under the MIT License. A very liberal license that encourages both commercial and non-commercial use. This version features:

• Can be used for commercial purposes.
• Full featured without limitations or restrictions.
• There are no separate runtime fees or royalties needed.

Not available for this version are:

• Warranty of any kind. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
• Technical Support. See section Commercial Support for more information on how to get support.
• Updates and fixes.

Support for the SDK under the MIT License is only available via https://github.com/technosoftware-gmbh/opc-daaehda-client-net-standard/issues.

The OPC DA/AE/HDA Client SDK .NET Standard source code is available under a commercial source code license. There are no separate runtime fees or royalties. It can be purchased via https://technosoftware.com/product/opc-daaehda-client-sdk-net-standard/. After purchase you will get access to the repository at https://github.com/technosoftware-gmbh/opc-daaehda-client-net-standard-src.

Our Source Code License Agreement (https://technosoftware.com/documents/Source_License_Agreement.pdf) allows the use of the OPC DA/AE/HDA Client SDK .NET Standard source code to develop software on and for all supported operating system and hardware platforms.

Support for the SDK under the Source Code License is only available via https://github.com/technosoftware-gmbh/opc-daaehda-client-net-standard-src.