def _address_space_fixes(self):
"""
Looks like the xml definition of address space has some error. This is a good place to fix them
"""
it = ua.AddReferencesItem()
it.SourceNodeId = ua.NodeId(ua.ObjectIds.BaseObjectType)
it.ReferenceTypeId = ua.NodeId(ua.ObjectIds.Organizes)
it.IsForward = False
it.TargetNodeId = ua.NodeId(ua.ObjectIds.ObjectTypesFolder)
it.TargetNodeClass = ua.NodeClass.Object
it2 = ua.AddReferencesItem()
it2.SourceNodeId = ua.NodeId(ua.ObjectIds.BaseDataType)
it2.ReferenceTypeId = ua.NodeId(ua.ObjectIds.Organizes)
it2.IsForward = False
it2.TargetNodeId = ua.NodeId(ua.ObjectIds.DataTypesFolder)
it2.TargetNodeClass = ua.NodeClass.Object
results = self.isession.add_references([it, it2])
params = ua.WriteParameters()
for nodeid in (
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerRead,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerHistoryReadData,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerHistoryReadEvents,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerWrite,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerHistoryUpdateData,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerHistoryUpdateEvents,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerMethodCall,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerBrowse,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerRegisterNodes,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerTranslateBrowsePathsToNodeIds,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerNodeManagement,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxMonitoredItemsPerCall
):
attr = ua.WriteValue()
attr.NodeId = ua.NodeId(nodeid)
attr.AttributeId = ua.AttributeIds.Value
attr.Value = ua.DataValue(ua.Variant(10000, ua.VariantType.UInt32),
ua.StatusCode(ua.StatusCodes.Good))
attr.Value.ServerTimestamp = datetime.utcnow()
params.NodesToWrite.append(attr)
result = self.isession.write(params)
result[0].check()
def set_attribute(self, attributeid, datavalue):
"""
Set an attribute of a node
"""
attr = ua.WriteValue()
attr.NodeId = self.nodeid
attr.AttributeId = attributeid
attr.Value = datavalue
params = ua.WriteParameters()
params.NodesToWrite = [attr]
result = self.server.write(params)
result[0].check()
async def set_node_attribute(self,
nodeId,
attribute,
value,
dataType=None):
"""
Sets node attribute based on given arguments.
Giving correct dataType for value and node speeds
up the write operation.
Arguments Example
nodeId: Target nodeId "ns=2;i=2"
attribute: Target attribute of node "Value"
value: Value for the attribute 1234
dataType: Data type of value "Int32"
Results
boolean: Indicates success True
writeTime: Time taken for write (ns) 12345678
"""
attr = ua.WriteValue()
if nodeId == "":
attr.NodeId = ua.NodeId.from_string(self.rootNodeId)
else:
attr.NodeId = ua.NodeId.from_string(nodeId)
attr.AttributeId = ua.AttributeIds[attribute]
if attribute == "Description":
dataValue = ua.LocalizedText(value)
else:
if dataType is None:
variantType = self.variant_type_finder(value, nodeId)
else:
variantType = ua.VariantType[dataType]
dataValue = ua.Variant(value, variantType)
attr.Value = ua.DataValue(dataValue)
params = ua.WriteParameters()
params.NodesToWrite.append(attr)
result, writeTime = await self.write(params)
if attribute == "Value":
return result[0].is_good(), writeTime
else:
return result[0].is_good()
