Open Source C++ OPC-UA Server and Client Library
LGPL OPC-UA server and client library written in C++ and with a lot of code auto-generated from xml specification using python.
Python bindings can be found in the python directory.
mailing list: https://groups.google.com/forum/#!forum/freeopcua
Currently supported: * read, write, browse * translateBrowsePathToNodeId * DataChange Events * Events * Subscriptions * complete opc-ua address space generated from xml specification * Method call from client * Linux and Windows(VS13) support
Work in progress * StatusChange Events * Filtering * Documentation * Automatic generation of binary protocol from OPC schema files * * Methods on server side
Not implemented yet (patches are welcome) * History * Security: Authentication, Certificates handling, ..
Documentation is sparse but several examples are availables:
C++ examples in https://github.com/FreeOpcUa/freeopcua/tree/master/src/examples
Python examples in https://github.com/FreeOpcUa/freeopcua/tree/master/python/src
https://github.com/FreeOpcUa/freeopcua/blob/master/python/tests/test_highlevel.py can also be a usefull source of information
client = opcua.Client(False) client.connect("opc.tcp://10.10.10.4:4841/OPCUA/AnyServer/")
objects = client.get_objects_node() print("Children of objects are: ", objects.get_children())
var = objects.get_child(["3:AnObject", "AVariable"]) print("Value of variable is: ", var.get_value())
An environment supporting c++11 is necessary: gcc-4.8+, clang 3.4 or VS2013
There is a script debian.soft in the root for installing all required soft to build all repositories.
autoreconf -f -i ./configure --prefix=/path/to/server make make check make install cd /path/to/server LD_LIBRARY_PATH=./lib ./bin/opcuaserver
mkdir build cd build cmake .. make make test
Boost and libxml2 are necessary
rem compiling mkdir build cd build cmake .. -DBOOST_ROOT=c:\boost_1_56 cmake --build ctest -C Debug cd bin\Debug example_server.exe
docker build .
C++ style * 2 spaces not tab * CamelCase * Local variables start with small letter * Global/member variables starts with capital letters * Use provided automatic formatter (Artistic Style) by invoking
python code and API should follows PEP8 (many places should be fixed)
Address space and most protocol code are auto-generated and should not be modified directly. Every auto-generated file starts with a mention that it should not be edited. There's a lot of old hand written protocol code left that should use the auto-generated code. This is done by uncommenting struct names in schemas/generate_protocol.py and removing old code and files in src/protocol and include/opc/ua/protocol/