class DemoServer: def __init__(self): self.server = Server() self.server.set_endpoint('opc.tcp://0.0.0.0:51210/UA/SampleServer') self.server.set_server_name('Custom structure demo server') # idx name will be used later for creating the xml used in data type dictionary self._idx_name = 'http://examples.freeopcua.github.io' self.idx = self.server.register_namespace(self._idx_name) self.dict_builder = DataTypeDictionaryBuilder(self.server, self.idx, self._idx_name, 'MyDictionary') def __enter__(self): return self def __exit__(self, exc_type, exc_val, exc_tb): quit() def start_server(self): self.server.start() def create_structure(self, name): # save the created data type return self.dict_builder.create_data_type(name) def complete_creation(self): self.dict_builder.set_dict_byte_string()
def mymain(): # setup our server server = Server() server.set_endpoint("opc.tcp://0.0.0.0:4840/freeopcua/server/") # setup our own namespace, not really necessary but should as spec uri = "http://examples.freeopcua.github.io" idx = server.register_namespace(uri) # get Objects node, this is where we should put our nodes objects = server.get_objects_node() # populating our address space myobj = objects.add_object(idx, "MyObject") myvar = myobj.add_variable(idx, "MyVariable", 6.7) myvar.set_writable() # Set MyVariable to be writable by clients # starting! server.start() server.stop()
''' import sys sys.path.insert(0, "..") import time from asyncua import ua, Server if __name__ == "__main__": # setup our server server = Server() server.set_endpoint("opc.tcp://0.0.0.0:4840/freeopcua/server/") # setup our own namespace, not really necessary but should as spec uri = "http://examples.freeopcua.github.io" idx = server.register_namespace(uri) # get Objects node, this is where we should put our custom stuff objects = server.get_objects_node() # Example 1 - create a basic object #------------------------------------------------------------------------------- myobj = objects.add_object(idx, "MyObject") #------------------------------------------------------------------------------- # Example 2 - create a new object type and a instance of the new object type #------------------------------------------------------------------------------- types = server.get_node(ua.ObjectIds.BaseObjectType) object_type_to_derive_from = server.get_root_node().get_child( ["0:Types", "0:ObjectTypes", "0:BaseObjectType"])
async def _uaserver(): parser = argparse.ArgumentParser( description= "Run an example OPC-UA server. By importing xml definition and using uawrite command line, it is even possible to expose real data using this server" ) # we setup a server, this is a bit different from other tool so we do not reuse common arguments parser.add_argument( "-u", "--url", help="URL of OPC UA server, default is opc.tcp://0.0.0.0:4840", default='opc.tcp://0.0.0.0:4840', metavar="URL") parser.add_argument( "-v", "--verbose", dest="loglevel", choices=['DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL'], default='WARNING', help="Set log level") parser.add_argument( "-x", "--xml", metavar="XML_FILE", help="Populate address space with nodes defined in XML") parser.add_argument("-p", "--populate", action="store_true", help="Populate address space with some sample nodes") parser.add_argument( "-c", "--disable-clock", action="store_true", help= "Disable clock, to avoid seeing many write if debugging an application" ) parser.add_argument( "-s", "--shell", action="store_true", help="Start python shell instead of randomly changing node values") parser.add_argument("--certificate", help="set server certificate") parser.add_argument("--private_key", help="set server private key") args = parser.parse_args() logging.basicConfig(format="%(levelname)s: %(message)s", level=getattr(logging, args.loglevel)) server = Server() server.set_endpoint(args.url) if args.certificate: server.load_certificate(args.certificate) if args.private_key: server.load_private_key(args.private_key) server.disable_clock(args.disable_clock) server.set_server_name("FreeOpcUa Example Server") if args.xml: server.import_xml(args.xml) if args.populate: @uamethod def multiply(parent, x, y): print("multiply method call with parameters: ", x, y) return x * y uri = "http://examples.freeopcua.github.io" idx = server.register_namespace(uri) objects = server.nodes.objects myobj = objects.add_object(idx, "MyObject") mywritablevar = myobj.add_variable(idx, "MyWritableVariable", 6.7) mywritablevar.set_writable( ) # Set MyVariable to be writable by clients myvar = myobj.add_variable(idx, "MyVariable", 6.7) myarrayvar = myobj.add_variable(idx, "MyVarArray", [6.7, 7.9]) myprop = myobj.add_property(idx, "MyProperty", "I am a property") mymethod = myobj.add_method( idx, "MyMethod", multiply, [ua.VariantType.Double, ua.VariantType.Int64], [ua.VariantType.Double]) try: await server.init() async with server: if args.shell: embed() elif args.populate: count = 0 while True: await asyncio.sleep(1) myvar.write_value(math.sin(count / 10)) myarrayvar.write_value( [math.sin(count / 10), math.sin(count / 100)]) count += 1 else: while True: await asyncio.sleep(1) except OSError as e: print(e) sys.exit(1) except KeyboardInterrupt: pass sys.exit(0)