Qt OPC UA
The Qt OPC UA module implements a Qt API to interact with OPC UA on top of a 3rd party OPC UA stack.
The stacks are integrated as plugins and can be selected at runtime. Currently, the following implementations are supported:
- Open62541 v1.1, MPLv2
- Unified Automation C++ SDK (UACpp), Commercial
The QML API is still in development but are available as a technology preview. This means those parts are unstable, likely to change, and provided as a convenience only.
Using the Module
The QML types are available through the
QtOpcUa import. To use the types, add the following import statement to your .qml file:
import QtOpcUa as QtOpcUa
Using the C++ API requires linking against the module library, either directly or through other dependencies. Several build tools have dedicated support for this, including CMake and qmake.
Building with CMake
find_package() command to locate the needed module components in the Qt6 package:
find_package(Qt6 REQUIRED COMPONENTS OpcUa) target_link_libraries(mytarget Qt::OpcUa)
Building with qmake
To configure the module for building with qmake, add the module as a value of the QT variable in the project's .pro file:
QT += opcua
Articles and Guides
- Using the OpenSSL Dependency for GDS Support
- Building Qt OPC UA Open62541 Plugin
- Building Qt OPC UA UACPP Plugin
- OPC UA at the OPC foundation
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