This is a fork of open62541, https://github.com/open62541/open62541

Julius Pfrommer a5162352b6 API improvements 9 years ago
bindings afc5c223a3 clean up binding generation 9 years ago
cmake b3a7b5845c 3rd try 9 years ago
deps a603409a5e reset queue.h to the original state and do the undef SLIST_ENTRY outside 9 years ago
doc 8ee327ac44 add introduction to UA to documentation. reset doxygen style until a more complete reskin is ready 9 years ago
examples a5162352b6 API improvements 9 years ago
include a5162352b6 API improvements 9 years ago
ports 3ed52fc0a2 fix wago port 9 years ago
src a5162352b6 API improvements 9 years ago
tests 22360d8aea fix travis again 9 years ago
tools 8861cc0679 improve build 9 years ago
.gitignore 9f6a679802 updated gitignore 9 years ago
.travis.yml f54522be6a amalgated source will be generated for Release and MinSizeRel build types, for other types, exclusive files will be compiled and used 9 years ago
AUTHORS c495d9b248 Update AUTHORS 9 years ago
CMakeLists.txt a8df8ec31e one more try to get stuff fixed 9 years ago
LICENSE 9310d323c9 changed .gitignore again 10 years ago
LICENSE-CC0 f8265df738 clean up include structure 9 years ago
README.md a5162352b6 API improvements 9 years ago

README.md

open62541

open62541 (http://open62541.org) is an open source and free implementation of OPC UA (OPC Unified Architecture). open62541 is a C-based library that contains all the necessary tools to set up a dedicated OPC UA server or to integrate OPC UA-based communication into existing applications (linking with C++ projects is possible). An example server implementation can be found in the /examples directory or further down on this page.

open62541 is licensed under the LGPL + static linking exception. That means open62541 can be freely used also in commercial projects, although changes to the open62541 library itself need to be released under the same license. The server and client implementations in the /examples directory are in the public domain (CC0 license). They can be used under any license and changes don't have to be published.

Ohloh Project Status Build Status Coverage Status Coverity Scan Build Status

Documentation

A general introduction to OPC UA and the open62541 documentation can be found at http://open62541.org/doc. Build instruction are here: https://github.com/acplt/open62541/wiki/Building-open62541.

For discussion and help, you can use

Contribute to open62541

As an open source project, we invite new contributors to help improving open62541. If you are a developer, your bugfixes and new features are very welcome. Note that there are ways to contribute even without deep knowledge of the project or the UA standard:

Example Server Implementation

#include <signal.h>

/* provided by the open62541 lib */
#include "ua_server.h"

/* provided by the user, implementations available in the /examples folder */
#include "logger_stdout.h"
#include "networklayer_tcp.h"

#define WORKER_THREADS 2 /* if multithreading is enabled */
#define PORT 16664

UA_Boolean running = UA_TRUE;
void signalHandler(int sign) {
	running = UA_FALSE;
}

int main(int argc, char** argv) {
    /* catch ctrl-c */
	signal(SIGINT, signalHandler);

    /* init the server */
	UA_Server *server = UA_Server_new();
    NetworklayerTCP *nl = ServerNetworkLayerTCP_new(UA_ConnectionConfig_standard, PORT);
    UA_Server_addNetworkLayer(server, nl);

    /* add a variable node */
    UA_Variant *myIntegerVariant = UA_Variant_new();
    UA_Int32 myInteger = 42;
    UA_Variant_copySetScalar(myIntegerVariant, &myInteger, &UA_TYPES[UA_TYPES_INT32]);
    UA_QualifiedName myIntegerName;
    UA_QUALIFIEDNAME_ASSIGN(myIntegerName, "the answer");
    UA_NodeId myIntegerNodeId = UA_NODEID_NULL; /* assign a random free nodeid */
    UA_NodeId parentNodeId = UA_NODEID_STATIC(0, UA_NS0ID_OBJECTSFOLDER);
    UA_NodeId parentReferenceNodeId = UA_NODEID_STATIC(0, UA_NS0ID_ORGANIZES);
    UA_Server_addVariableNode(server, myIntegerVariant, myIntegerName,
                              myIntegerNodeId, parentNodeId, parentReferenceNodeId);

    /* run the server loop */
    UA_StatusCode retval = UA_Server_run(server, WORKER_THREADS, &running);
	UA_Server_delete(server);
	return retval;
}