How to use the opcua.Node function in opcua

To help you get started, we’ve selected a few opcua examples, based on popular ways it is used in public projects.

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FreeOpcUa / python-opcua / tests / tests_server.py View on Github

def check_custom_type(test, type, base_type, node_class=None):
    base = opcua.Node(test.opc.iserver.isession, ua.NodeId(base_type))
    test.assertTrue(type in base.get_children())
    nodes = type.get_referenced_nodes(refs=ua.ObjectIds.HasSubtype, direction=ua.BrowseDirection.Inverse, includesubtypes=True)
    test.assertEqual(base, nodes[0])
    properties = type.get_properties()

    if node_class:
        test.assertEqual(node_class, type.get_node_class())

    test.assertIsNot(properties, None)
    test.assertEqual(len(properties), 2)
    test.assertTrue(type.get_child("2:PropertyNum") in properties)
    test.assertEqual(type.get_child("2:PropertyNum").get_data_value().Value.VariantType, ua.VariantType.Int32)
    test.assertTrue(type.get_child("2:PropertyString") in properties)
    test.assertEqual(type.get_child("2:PropertyString").get_data_value().Value.VariantType, ua.VariantType.String)

FreeOpcUa / opcua-asyncio / tests / tests_server.py View on Github

def check_custom_type(test, type, base_type):
    base = opcua.Node(test.opc.iserver.isession, ua.NodeId(base_type))
    test.assertTrue(type in base.get_children())
    nodes = type.get_referenced_nodes(refs=ua.ObjectIds.HasSubtype, direction=ua.BrowseDirection.Inverse, includesubtypes=True)
    test.assertEqual(base, nodes[0])
    properties = type.get_properties()
    test.assertIsNot(properties, None)
    test.assertEqual(len(properties), 2)
    test.assertTrue(type.get_child("2:PropertyNum") in properties)
    test.assertEqual(type.get_child("2:PropertyNum").get_data_value().Value.VariantType, ua.VariantType.Int32)
    test.assertTrue(type.get_child("2:PropertyString") in properties)
    test.assertEqual(type.get_child("2:PropertyString").get_data_value().Value.VariantType, ua.VariantType.String)

FreeOpcUa / python-opcua / opcua / common / shortcuts.py View on Github

def __init__(self, server):
        self.root = Node(server, ObjectIds.RootFolder)
        self.objects = Node(server, ObjectIds.ObjectsFolder)
        self.server = Node(server, ObjectIds.Server)
        self.types = Node(server, ObjectIds.TypesFolder)
        self.base_object_type = Node(server, ObjectIds.BaseObjectType)
        self.base_data_type = Node(server, ObjectIds.BaseDataType)
        self.base_event_type = Node(server, ObjectIds.BaseEventType)
        self.base_variable_type = Node(server, ObjectIds.BaseVariableType)
        self.folder_type = Node(server, ObjectIds.FolderType)
        self.enum_data_type = Node(server, ObjectIds.Enumeration)
        self.types = Node(server, ObjectIds.TypesFolder)
        self.data_types = Node(server, ObjectIds.DataTypesFolder)
        self.event_types = Node(server, ObjectIds.EventTypesFolder)
        self.reference_types = Node(server, ObjectIds.ReferenceTypesFolder)
        self.variable_types = Node(server, ObjectIds.VariableTypesFolder)
        self.object_types = Node(server, ObjectIds.ObjectTypesFolder)
        self.namespace_array = Node(server, ObjectIds.Server_NamespaceArray)
        self.opc_binary = Node(server, ObjectIds.OPCBinarySchema_TypeSystem)

FreeOpcUa / python-opcua / opcua / common / shortcuts.py View on Github

def __init__(self, server):
        self.root = Node(server, ObjectIds.RootFolder)
        self.objects = Node(server, ObjectIds.ObjectsFolder)
        self.server = Node(server, ObjectIds.Server)
        self.types = Node(server, ObjectIds.TypesFolder)
        self.base_object_type = Node(server, ObjectIds.BaseObjectType)
        self.base_data_type = Node(server, ObjectIds.BaseDataType)
        self.base_event_type = Node(server, ObjectIds.BaseEventType)
        self.base_variable_type = Node(server, ObjectIds.BaseVariableType)
        self.folder_type = Node(server, ObjectIds.FolderType)
        self.enum_data_type = Node(server, ObjectIds.Enumeration)
        self.types = Node(server, ObjectIds.TypesFolder)
        self.data_types = Node(server, ObjectIds.DataTypesFolder)
        self.event_types = Node(server, ObjectIds.EventTypesFolder)
        self.reference_types = Node(server, ObjectIds.ReferenceTypesFolder)
        self.variable_types = Node(server, ObjectIds.VariableTypesFolder)
        self.object_types = Node(server, ObjectIds.ObjectTypesFolder)
        self.namespace_array = Node(server, ObjectIds.Server_NamespaceArray)
        self.opc_binary = Node(server, ObjectIds.OPCBinarySchema_TypeSystem)

FreeOpcUa / python-opcua / opcua / common / shortcuts.py View on Github

def __init__(self, server):
        self.root = Node(server, ObjectIds.RootFolder)
        self.objects = Node(server, ObjectIds.ObjectsFolder)
        self.server = Node(server, ObjectIds.Server)
        self.types = Node(server, ObjectIds.TypesFolder)
        self.base_object_type = Node(server, ObjectIds.BaseObjectType)
        self.base_data_type = Node(server, ObjectIds.BaseDataType)
        self.base_event_type = Node(server, ObjectIds.BaseEventType)
        self.base_variable_type = Node(server, ObjectIds.BaseVariableType)
        self.folder_type = Node(server, ObjectIds.FolderType)
        self.enum_data_type = Node(server, ObjectIds.Enumeration)
        self.types = Node(server, ObjectIds.TypesFolder)
        self.data_types = Node(server, ObjectIds.DataTypesFolder)
        self.event_types = Node(server, ObjectIds.EventTypesFolder)
        self.reference_types = Node(server, ObjectIds.ReferenceTypesFolder)
        self.variable_types = Node(server, ObjectIds.VariableTypesFolder)
        self.object_types = Node(server, ObjectIds.ObjectTypesFolder)
        self.namespace_array = Node(server, ObjectIds.Server_NamespaceArray)
        self.opc_binary = Node(server, ObjectIds.OPCBinarySchema_TypeSystem)

FreeOpcUa / opcua-asyncio / opcua / common / instanciate.py View on Github

ref = ua.AddReferencesItem()
    ref.IsForward = True
    ref.ReferenceTypeId = addnode.ReferenceTypeId
    ref.SourceNodeId = parentid
    ref.TargetNodeClass = addnode.NodeClass
    ref.TargetNodeId = addnode.RequestedNewNodeId

    refs.append(ref)
    server.add_references(refs)

    descs = node_type.get_children_descriptions(includesubtypes=False)  # FIXME: should be false
    print("node is", rdesc.NodeId, node_type, node_type.get_children())
    print("Children are: ", descs)
    for rdesc in descs:
        _instanciate_node(server, addnode.RequestedNewNodeId, rdesc, idx)
    return Node(server, addnode.RequestedNewNodeId)

FreeOpcUa / python-opcua / opcua / common / shortcuts.py View on Github

def __init__(self, server):
        self.root = Node(server, ObjectIds.RootFolder)
        self.objects = Node(server, ObjectIds.ObjectsFolder)
        self.server = Node(server, ObjectIds.Server)
        self.types = Node(server, ObjectIds.TypesFolder)
        self.base_object_type = Node(server, ObjectIds.BaseObjectType)
        self.base_data_type = Node(server, ObjectIds.BaseDataType)
        self.base_event_type = Node(server, ObjectIds.BaseEventType)
        self.base_variable_type = Node(server, ObjectIds.BaseVariableType)
        self.folder_type = Node(server, ObjectIds.FolderType)
        self.enum_data_type = Node(server, ObjectIds.Enumeration)
        self.types = Node(server, ObjectIds.TypesFolder)
        self.data_types = Node(server, ObjectIds.DataTypesFolder)
        self.event_types = Node(server, ObjectIds.EventTypesFolder)
        self.reference_types = Node(server, ObjectIds.ReferenceTypesFolder)
        self.variable_types = Node(server, ObjectIds.VariableTypesFolder)
        self.object_types = Node(server, ObjectIds.ObjectTypesFolder)
        self.namespace_array = Node(server, ObjectIds.Server_NamespaceArray)
        self.opc_binary = Node(server, ObjectIds.OPCBinarySchema_TypeSystem)

FreeOpcUa / opcua-asyncio / opcua / common / instanciate.py View on Github

def _instanciate_node(server, parentid, rdesc, idx):
    """
    Instanciate a new node under 'parent' using a type
    """

    print("Instanciating: node %s in %s" % (rdesc, parentid))
    addnode = ua.AddNodesItem()
    addnode.RequestedNewNodeId = ua.NodeId()
    addnode.BrowseName = rdesc.BrowseName
    addnode.NodeClass = rdesc.NodeClass
    addnode.ParentNodeId = parentid
    addnode.ReferenceTypeId = ua.TwoByteNodeId(ua.ObjectIds.HasComponent)
    addnode.TypeDefinition = rdesc.TypeDefinition
    print("ADDNODE", addnode)

    node_type = Node(server, rdesc.NodeId)

    if rdesc.NodeClass in (ua.NodeClass.Object, ua.NodeClass.ObjectType):
        print(node_type, " is object")
        _read_and_copy_attrs(node_type, ua.ObjectAttributes(), addnode)
        #_add_object_attrs(addnode, rdesc, node_type)

    elif rdesc.NodeClass in (ua.NodeClass.Variable, ua.NodeClass.VariableType):
        print(node_type, " is variable")
        _read_and_copy_attrs(node_type, ua.VariableAttributes(), addnode)
        #_add_variable_attrs(addnode, rdesc, node_type)

    else:
        print("Node class not supported: ", rdesc.NodeClass)

    print("ADDNODE FINAL ", addnode)
    server.add_nodes([addnode])

FreeOpcUa / python-opcua / opcua / common / shortcuts.py View on Github

def __init__(self, server):
        self.root = Node(server, ObjectIds.RootFolder)
        self.objects = Node(server, ObjectIds.ObjectsFolder)
        self.server = Node(server, ObjectIds.Server)
        self.types = Node(server, ObjectIds.TypesFolder)
        self.base_object_type = Node(server, ObjectIds.BaseObjectType)
        self.base_data_type = Node(server, ObjectIds.BaseDataType)
        self.base_event_type = Node(server, ObjectIds.BaseEventType)
        self.base_variable_type = Node(server, ObjectIds.BaseVariableType)
        self.folder_type = Node(server, ObjectIds.FolderType)
        self.enum_data_type = Node(server, ObjectIds.Enumeration)
        self.types = Node(server, ObjectIds.TypesFolder)
        self.data_types = Node(server, ObjectIds.DataTypesFolder)
        self.event_types = Node(server, ObjectIds.EventTypesFolder)
        self.reference_types = Node(server, ObjectIds.ReferenceTypesFolder)
        self.variable_types = Node(server, ObjectIds.VariableTypesFolder)
        self.object_types = Node(server, ObjectIds.ObjectTypesFolder)
        self.namespace_array = Node(server, ObjectIds.Server_NamespaceArray)
        self.opc_binary = Node(server, ObjectIds.OPCBinarySchema_TypeSystem)

FreeOpcUa / opcua-client-gui / uaclient / mainwindow.py View on Github

def _subscribe(self, node=None):
        if not isinstance(node, Node):
            node = self.window.get_current_node()
            if node is None:
                return
        if node in self._subscribed_nodes:
            logger.warning("allready subscribed to node: %s ", node)
            return
        self.model.setHorizontalHeaderLabels(["DisplayName", "Value", "Timestamp"])
        text = str(node.get_display_name().Text)
        row = [QStandardItem(text), QStandardItem("No Data yet"), QStandardItem("")]
        row[0].setData(node)
        self.model.appendRow(row)
        self._subscribed_nodes.append(node)
        self.window.ui.subDockWidget.raise_()
        try:
            self.uaclient.subscribe_datachange(node, self._subhandler)
        except Exception as ex:

How to use the opcua.Node function in opcua

To help you get started, we’ve selected a few opcua examples, based on popular ways it is used in public projects.

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