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.
- read, write, browse
- DataChange Events
- complete opc-ua address space generated from xml specification
- Method call from client
- Linux and Windows(VS13) support
Work in progress
- StatusChange Events
- Automatic generation of binary protocol from OPC schema files
- Methods on server side
Not implemented yet (patches are welcome)
- 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
Example minimal client in python
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()) client.disconnect()
Tested clients and servers with default settings
- uaexperts client application
- node-opcua (client and server tested)
- ignition server
- Beckhoff PLC (seems to be some issues, but mostly working)
- ignition open-source sdk (server tested)
- quickopc client sdk
- prosysopc demo client
- prosysopc demo server
- unified automation sdk (client and server tested)
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.
Using GNU autotools
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 -f docker/Dockerfile .
- 2 spaces not tab
- local variables start with small letter
- gobal/member variables starts with capital letters.
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/