open62541++

open62541++ is a C++ wrapper built on top of the amazing open62541 OPC UA (OPC Unified Architecture) library.

The documentation is available on https://open62541pp.readthedocs.io/en/latest/.

It aims to:

• safely wrap the open62541 UA_* types to prevent memory leaks.
• expose high level and easy to use Server, Client (TODO), and Node classes similar to the python-opcua API
• minimize code
• reduce the hurdle to get started with OPC UA
• use modern C++ (C++ 17) and best practices
• native open62541 objects can be accessed using the handle() method of the wrapping classes to give you all the power of open62541 (the open62541++ API is quite limited at the moment)

Dependencies

• open62541 (included as submodule)
• catch2 (included)

Build

The library is built using CMake. Please check out the open62541 build options here: https://open62541.org/doc/1.0/building.html

Example

#include <iostream>

#include "open62541pp/open62541pp.h"

int main() {
    opcua::Server server;

    const auto        myIntegerNodeId = opcua::NodeId("the.answer", 1);
    const std::string myIntegerName   = "the answer";

    // create node
    auto parentNode    = server.getObjectsNode();
    auto myIntegerNode = parentNode.addVariable(myIntegerNodeId, myIntegerName, opcua::Type::Int32);

    // set node attributes
    myIntegerNode.setDisplayName("the answer");
    myIntegerNode.setDescription("the answer");

    // write value
    myIntegerNode.write(42);

    // read value
    std::cout << "The answer is: " << myIntegerNode.read<int>() << std::endl;

    server.start();

    return 0;
}