def setUp(self):
# create a new ClientSettings instance and add the localhost to the URLs to discover
settings = pyuaf.client.settings.ClientSettings()
settings.discoveryUrls.append(ARGS.demo_url)
settings.applicationName = "client"
settings.logToStdOutLevel = ARGS.loglevel
self.client = pyuaf.client.Client(settings)
serverUri = ARGS.demo_server_uri
demoNsUri = ARGS.demo_ns_uri
plcOpenNsUri = "http://PLCopen.org/OpcUa/IEC61131-3/"
self.address_Scalar = Address(
ExpandedNodeId("Demo.Static.Scalar", demoNsUri, serverUri))
self.address_Byte = Address(
self.address_Scalar,
[RelativePathElement(QualifiedName("Byte", demoNsUri))])
self.address_Int32 = Address(
self.address_Scalar,
[RelativePathElement(QualifiedName("Int32", demoNsUri))])
self.address_Float = Address(
self.address_Scalar,
[RelativePathElement(QualifiedName("Float", demoNsUri))])
def setUp(self):
# create a new ClientSettings instance and add the localhost to the URLs to discover
settings = ClientSettings()
settings.discoveryUrls.append(ARGS.demo_url)
settings.applicationName = "client"
settings.logToStdOutLevel = ARGS.loglevel
self.client = pyuaf.client.Client(settings)
self.serverUri = ARGS.demo_server_uri
demoNsUri = ARGS.demo_ns_uri
plcOpenNsUri = "http://PLCopen.org/OpcUa/IEC61131-3/"
# define some addresses
self.addresses = [ Address(NodeId("Demo.SimulationSpeed", demoNsUri), self.serverUri),
Address(NodeId("Demo.SimulationActive", demoNsUri), self.serverUri) ]
self.address_Method = Address(ExpandedNodeId("Demo.Method", demoNsUri, self.serverUri))
self.address_Multiply = Address(ExpandedNodeId("Demo.Method.Multiply", demoNsUri, self.serverUri))
self.address_Alarms = Address(ExpandedNodeId("AlarmsWithNodes", demoNsUri, self.serverUri))
readResult = self.client.read(self.addresses)
self.values = [readResult.targets[0].data, readResult.targets[1].data]
del self.client
self.client = pyuaf.client.Client(settings)
def setUp(self):
# create a new ClientSettings instance and add the localhost to the URLs to discover
settings = pyuaf.client.settings.ClientSettings()
settings.discoveryUrls.append(ARGS.demo_url)
settings.applicationName = "client"
settings.logToStdOutLevel = ARGS.loglevel
self.client = MyClient(settings)
serverUri = ARGS.demo_server_uri
demoNsUri = ARGS.demo_ns_uri
self.address_Demo = Address(
ExpandedNodeId("Demo", demoNsUri, serverUri))
self.address_Method = Address(
self.address_Demo,
[RelativePathElement(QualifiedName("Method", demoNsUri))])
self.address_Multiply = Address(
self.address_Method,
[RelativePathElement(QualifiedName("Multiply", demoNsUri))])
self.address_SetSimulationSpeed = Address(self.address_Demo, [
RelativePathElement(QualifiedName("SetSimulationSpeed", demoNsUri))
])
self.request = AsyncMethodCallRequest(1)
self.request.targets[0].objectAddress = self.address_Method
self.request.targets[0].methodAddress = self.address_Multiply
self.request.targets[0].inputArguments.append(Double(2.0))
self.request.targets[0].inputArguments.append(Double(3.0))
def setUp(self):
# create a new ClientSettings instance and add the localhost to the URLs to discover
settings = pyuaf.client.settings.ClientSettings()
settings.discoveryUrls.append(ARGS.demo_url)
settings.applicationName = "client"
settings.logToStdOutLevel = ARGS.loglevel
self.client = pyuaf.client.Client(settings)
serverUri = ARGS.demo_server_uri
demoNsUri = ARGS.demo_ns_uri
plcOpenNsUri = "http://PLCopen.org/OpcUa/IEC61131-3/"
self.address_Demo = Address(ExpandedNodeId("Demo", demoNsUri, serverUri))
self.address_StartSimulation = Address(self.address_Demo, [RelativePathElement(QualifiedName("StartSimulation", demoNsUri))])
self.address_StopSimulation = Address(self.address_Demo, [RelativePathElement(QualifiedName("StopSimulation", demoNsUri))])
self.address_Scalar = Address(self.address_Demo, [RelativePathElement(QualifiedName("Dynamic", demoNsUri)),
RelativePathElement(QualifiedName("Scalar", demoNsUri))] )
self.address_Byte = Address(self.address_Scalar, [RelativePathElement(QualifiedName("Byte", demoNsUri))] )
self.address_Int32 = Address(self.address_Scalar, [RelativePathElement(QualifiedName("Int32", demoNsUri))] )
self.address_Int64 = Address(self.address_Scalar, [RelativePathElement(QualifiedName("Int64", demoNsUri))] )
self.address_Float = Address(self.address_Scalar, [RelativePathElement(QualifiedName("Float", demoNsUri))] )
self.address_Double = Address(self.address_Scalar, [RelativePathElement(QualifiedName("Double", demoNsUri))] )
# start the simulation (otherwise the dynamic variables won't change)
self.client.call(self.address_Demo, self.address_StartSimulation)
def setUp(self):
# create a new ClientSettings instance and add the localhost to the URLs to discover
settings = pyuaf.client.settings.ClientSettings()
settings.discoveryUrls.append(ARGS.demo_url)
settings.applicationName = "client"
settings.logToStdOutLevel = ARGS.loglevel
self.client = pyuaf.client.Client(settings)
serverUri = ARGS.demo_server_uri
demoNsUri = ARGS.demo_ns_uri
plcOpenNsUri = "http://PLCopen.org/OpcUa/IEC61131-3/"
# define some nodeids
self.id0 = NodeId(opcuaidentifiers.OpcUaId_Server_Auditing, 0)
self.id1 = NodeId(
opcuaidentifiers.
OpcUaId_Server_ServerCapabilities_MaxHistoryContinuationPoints, 0)
self.id2 = NodeId("Demo.SimulationSpeed", 2)
self.id3 = NodeId("Demo.SimulationActive", demoNsUri)
self.id4 = NodeId(opcuaidentifiers.OpcUaId_Server_ServerArray, 0)
# define some nodeids
self.address0 = Address(ExpandedNodeId(self.id0, serverUri))
self.address1 = Address(ExpandedNodeId(self.id1, serverUri))
self.address2 = Address(ExpandedNodeId(self.id2, serverUri))
self.address3 = Address(ExpandedNodeId(self.id3, serverUri))
self.address4 = Address(ExpandedNodeId(self.id4, serverUri))
# create some relative paths
self.id5 = NodeId("Demo.BoilerDemo.Boiler1", demoNsUri)
self.start5 = Address(ExpandedNodeId(self.id5, serverUri))
self.name5 = QualifiedName("TemperatureSetPoint", demoNsUri)
self.elem5 = RelativePathElement(self.name5)
self.path5 = [self.elem5]
self.address5 = Address(self.start5, self.path5)
self.start6 = Address(ExpandedNodeId("Demo", demoNsUri, serverUri))
self.elem6a = RelativePathElement(
QualifiedName("BoilerDemo", demoNsUri))
self.elem6b = RelativePathElement(QualifiedName("Boiler1", demoNsUri))
self.path6 = [self.elem6a, self.elem6b]
self.address6 = Address(self.start6, self.path6)
self.elem7a = RelativePathElement(
QualifiedName("TemperatureSensor", demoNsUri))
self.elem7b = RelativePathElement(
QualifiedName("Temperature", demoNsUri))
self.path7 = [self.elem7a, self.elem7b]
self.address7 = Address(self.address6, self.path7)
def setUp(self):
# create a new ClientSettings instance and add the localhost to the URLs to discover
settings = pyuaf.client.settings.ClientSettings()
settings.discoveryUrls.append(ARGS.demo_url)
settings.applicationName = "client"
settings.logToStdOutLevel = ARGS.loglevel
self.client = pyuaf.client.Client(settings)
serverUri = ARGS.demo_server_uri
demoNsUri = ARGS.demo_ns_uri
self.address_demo = Address(NodeId("Demo" , demoNsUri), serverUri)
self.address_startSim = Address(NodeId("Demo.StartSimulation" , demoNsUri), serverUri)
self.address_stopSim = Address(NodeId("Demo.StopSimulation" , demoNsUri), serverUri)
self.address_history = Address(NodeId("Demo.History" , demoNsUri), serverUri)
self.address_startLog = Address(NodeId("Demo.History.StartLogging" , demoNsUri), serverUri)
self.address_stopLog = Address(NodeId("Demo.History.StopLogging" , demoNsUri), serverUri)
self.address_byte = Address(NodeId("Demo.History.ByteWithHistory" , demoNsUri), serverUri)
self.address_double = Address(NodeId("Demo.History.DoubleWithHistory" , demoNsUri), serverUri)
# start the simulation and the logging
self.assertTrue( self.client.call(self.address_demo, self.address_startSim).overallStatus.isGood() )
self.client.call(self.address_history, self.address_startLog).overallStatus.isGood()
self.startTime = time.time()
# sleep a little more than a second, to make sure we have some historical data
time.sleep(2)
def __init__(self,addr):
self.a = addr
self.contained = {}
self.variables = {}
# execute browse
browse_result = client.browse([ self.a ])
for ri in xrange(len(browse_result.targets[0].references)):
ref = browse_result.targets[0].references[ri]
print ref.displayName
# now we have information - node class
if ref.nodeClass == nodeclasses.Variable:
self.variables[str(ref.displayName.text())] = Address(ExpandedNodeId(ref.nodeId))
elif ref.nodeClass == nodeclasses.Object:
if unfold:
self.contained[str(ref.displayName.text())] = ObjectifiedNode( Address(ExpandedNodeId(ref.nodeId)) )
def connect():
global client
cs = ClientSettings("myClient", [server_address])
# Uncomment below for session logging
# cs.logToStdOutLevel = loglevels.Info
max_attempts = 40
num_attempts = 0
while (True):
print "Trying to connect to the OPC UA Server. Attempt #" + str(
num_attempts)
result = None
try:
client = Client(cs)
rootNode = Address(NodeId(opcuaidentifiers.OpcUaId_RootFolder, 0),
server_uri)
result = client.browse([rootNode])
except Exception as e:
print "Got exception: " + str(e)
num_attempts = num_attempts + 1
if num_attempts > max_attempts:
msg = 'Despite ' + str(
max_attempts
) + ' attempts couldnt establish OPC UA connection: exception is ' + str(
e)
print msg
dcs_test_utils.log_detail(False, msg, '')
raise msg
time.sleep(3)
continue
print 'Connected to OPC UA Server'
return
def get_attribute(client, expanded_node_id, attribute, context):
result = client.read([Address(expanded_node_id)], attribute)
if result.targets[0].status.isGood():
data = result.targets[0].data
if type(data) == LocalizedText:
attribute_value = data.text()
elif type(data) in [
primitives.Int32, primitives.Byte, primitives.Boolean
]:
attribute_value = data.value
elif type(data) == QualifiedName:
attribute_value = data.name()
elif type(data) == NodeId:
attribute_value = stringify_nodeid(data)
elif type(data) == type(None):
attribute_value = 'WARNING_attribute_value_is_none'
context['errors'] += 1
else:
raise Exception("Don't know what to do when typs is {0}".format(
str(type(data))))
else:
context['errors'] += 1
attribute_value = "ERROR_attribute_not_readable"
return attribute_value
def ADR(self):
if isinstance(self.__opcua_parent__, Address):
parentAddress = self.__opcua_parent__
else:
parentAddress = self.__opcua_parent__.ADR()
return Address(parentAddress, [RelativePathElement(QualifiedName(self.__opcua_name__, self.__opcua_ns__))])
def setUp(self):
# create a new ClientSettings instance and add the localhost to the URLs to discover
settings = pyuaf.client.settings.ClientSettings()
settings.discoveryUrls.append(ARGS.demo_url)
settings.applicationName = "client"
settings.logToStdOutLevel = ARGS.loglevel
self.client = pyuaf.client.Client(settings)
serverUri = ARGS.demo_server_uri
demoNsUri = ARGS.demo_ns_uri
plcOpenNsUri = "http://PLCopen.org/OpcUa/IEC61131-3/"
self.address_Demo = Address(ExpandedNodeId("Demo" , demoNsUri, serverUri))
self.address_StaticScalar = Address(ExpandedNodeId("Demo.Static.Scalar" , demoNsUri, serverUri))
self.address_DynamicScalar = Address(ExpandedNodeId("Demo.Dynamic.Scalar", demoNsUri, serverUri))
def build_objects(self, address):
o = Object(Node(self, address))
browse_result = self.client.browse([address])
for ri in xrange(len(browse_result.targets[0].references)):
ref = browse_result.targets[0].references[ri]
print ref.displayName
# now we have information - node class
if ref.nodeClass == nodeclasses.Variable:
o.variables[str(ref.displayName.text())] = Variable(
Node(self, Address(ExpandedNodeId(ref.nodeId))))
elif ref.nodeClass == nodeclasses.Method:
o.methods[str(ref.displayName.text())] = Method(
Node(self, Address(ExpandedNodeId(ref.nodeId))), o)
elif ref.nodeClass == nodeclasses.Object:
o.children_objects[str(
ref.displayName.text())] = self.build_objects(
Address(ExpandedNodeId(ref.nodeId)))
return o
def setUp(self):
# create a new ClientSettings instance and add the localhost to the URLs to discover
settings = pyuaf.client.settings.ClientSettings()
settings.discoveryUrls.append(ARGS.demo_url)
settings.applicationName = "client"
settings.logToStdOutLevel = ARGS.loglevel
self.client = pyuaf.client.Client(settings)
serverUri = ARGS.demo_server_uri
demoNsUri = ARGS.demo_ns_uri
self.address_Demo = Address(ExpandedNodeId("Demo", demoNsUri, serverUri))
self.address_Method = Address(self.address_Demo, [RelativePathElement(QualifiedName("Method", demoNsUri))] )
self.address_Multiply = Address(self.address_Method, [RelativePathElement(QualifiedName("Multiply", demoNsUri))] )
self.address_SetSimulationSpeed = Address(self.address_Demo, [RelativePathElement(QualifiedName("SetSimulationSpeed", demoNsUri))] )
def setUp(self):
# create a new ClientSettings instance and add the localhost to the URLs to discover
settings = pyuaf.client.settings.ClientSettings()
settings.discoveryUrls.append(ARGS.demo_url)
settings.applicationName = "client"
settings.logToStdOutLevel = ARGS.loglevel
self.client = MyClient(settings)
self.serverUri = ARGS.demo_server_uri
demoNsUri = ARGS.demo_ns_uri
plcOpenNsUri = "http://PLCopen.org/OpcUa/IEC61131-3/"
# define some nodeids
self.id = NodeId(opcuaidentifiers.OpcUaId_Server_Auditing, 0)
# define some addresses
self.address = Address(ExpandedNodeId(self.id, self.serverUri))
# define the namespace URI and server URI of the UaServerCPP demo server
demoServerUri = "urn:UnifiedAutomation:UaServerCpp"
demoNamespaceUri = "urn:UnifiedAutomation:CppDemoServer:BuildingAutomation"
# define the ClientSettings:
settings = ClientSettings()
settings.applicationName = "MyClient"
settings.discoveryUrls.append("opc.tcp://localhost:48010")
# create the client
myClient = Client(settings)
# define the address of the Structure which we would like to read
units_address = Address( NodeId("AirConditioner_1.Temperature.EngineeringUnits", demoNamespaceUri), demoServerUri )
range_address = Address( NodeId("AirConditioner_1.Temperature.EURange", demoNamespaceUri), demoServerUri )
# try to read a structure
result = myClient.read( [units_address, range_address] )
# we're expecting ExtensionObjects. Let's check this:
for i in xrange(2):
if isinstance(result.targets[i].data, ExtensionObject):
print("We received an ExtensionObject")
else:
raise Exception("Oops, we were expecting an ExtensionObject, but we received a: %s" %result.targets[0].data)
units_extensionObject = result.targets[0].data
range_extensionObject = result.targets[1].data
myClient.registerUntrustedServerCertificateCallback(myCallback)
print("")
print(
"==========================================================================================="
)
print("STEP 7: Read some variable using the configured secure session")
print(
"==========================================================================================="
)
print("")
# define the address of a node which we would like to read:
someAddress = Address(NodeId("Demo.SimulationSpeed", DEMOSERVER_NS_URI),
SERVER_URI)
result = myClient.read([someAddress], sessionSettings=sessionSettings)
# Note that instead of explicitly providing the sessionSettings **kwarg argument, we could also
# have done the following:
# clientSettings.defaultSessionSettings = sessionSettings
# myClient.setClientSettings(clientSettings)
# result = myClient.read( [someAddress] )
print("")
print("Read result:")
print(result)
print("")
# check the session that was used to read this address:
import pyuaf
from pyuaf.client import Client
from pyuaf.client.settings import ClientSettings
from pyuaf.client.requests import BrowseRequest, BrowseRequestTarget
from pyuaf.client.configs import BrowseConfig, SessionConfig
from pyuaf.util import Address, NodeId
from pyuaf.util import primitives
from pyuaf.util import opcuaidentifiers
from pyuaf.util.errors import UafError
# define the namespace URI and server URI of the UaServerCPP demo server
demoServerUri = "urn:UnifiedAutomation:UaServerCpp"
# define the address of the Root node which we would like to start browsing
rootNode = Address(NodeId(opcuaidentifiers.OpcUaId_RootFolder, 0),
demoServerUri)
# define the ClientSettings:
settings = ClientSettings()
settings.applicationName = "MyClient"
settings.discoveryUrls.append("opc.tcp://localhost:48010")
# create the client
myClient = Client(settings)
try:
print("")
print("First option: use the convenience function \"browse()\"")
print("===================================================")
# now browse the root node
# servers, they will be created according to the specified settings.
# If sessions need to be created to other servers, they will be created according to the
# defaultSessionSettings settings.
# configure a client ...
clientSettings = ClientSettings()
clientSettings.applicationName = "MyClient"
clientSettings.discoveryUrls.append("opc.tcp://10.133.78.42")
clientSettings.discoveryUrls.append("opc.tcp://10.133.78.81")
clientSettings.discoveryUrls.append("opc.tcp://10.134.25.16")
# ... and create the client
myClient = Client(clientSettings)
# define some addresses
temperature1 = Address(NodeId("temperature1", "MyCompanyNamespace"),
"Some/OPCUA/Server")
temperature2 = Address(NodeId("temperature2", "MyCompanyNamespace"),
"Some/OPCUA/Server")
pressure0005 = Address(NodeId("pressure0005", "MyCompanyNamespace"),
"My/Unreliable/Device/Server")
motorStatus3 = Address(NodeId("motorStatus3", "MyCompanyNamespace"),
"My/Reliable/PLC/Server")
# now we can read, write, ... any address(es) without worrying about the settings of the sessions!
# read the Value attribute of the 4 nodes
myReadResult = myClient.read(
[temperature1, temperature2, pressure0005, motorStatus3],
sessionConfig=cfg)
# write a new motor status
from pyuaf.client.settings import ClientSettings
from pyuaf.client.requests import ReadRequest, AsyncReadRequest, ReadRequestTarget
from pyuaf.client.configs import ReadConfig, SessionConfig
from pyuaf.util import Address, NodeId, RelativePathElement, QualifiedName, LocalizedText
from pyuaf.util import primitives
from pyuaf.util.errors import UafError
# define the namespace URI and server URI of the UaDemoServer
demoNsUri = "http://www.unifiedautomation.com/DemoServer"
demoServerUri = "urn:UnifiedAutomation:UaServerCpp"
# define some addresses of nodes of which we will read the Value attribute
# (you could also define addresses as Relative Paths to other addresses,
# see the example that shows you how to define addresses)
someDoubleNode = Address( NodeId("Demo.Static.Scalar.Double" , demoNsUri), demoServerUri )
someUInt32Node = Address( NodeId("Demo.Static.Scalar.UInt32" , demoNsUri), demoServerUri )
someStringNode = Address( NodeId("Demo.Static.Scalar.String" , demoNsUri), demoServerUri )
someLocalizedTextNode = Address( NodeId("Demo.Static.Scalar.LocalizedText" , demoNsUri), demoServerUri )
someSByteArrayNode = Address( NodeId("Demo.Static.Arrays.SByte" , demoNsUri), demoServerUri )
# define a function to print the readResult (which is of type pyuaf.client.results.ReadResult)
def printResult(readResult):
# overall result
print("The overall status is: %s" %str(readResult.overallStatus))
# target 0:
status = readResult.targets[0].status # 'status' has type pyuaf.util.Status
data = readResult.targets[0].data # 'data' has type pyuaf.util.primitives.Double
if status.isGood() and isinstance(data, primitives.Double):
print("The double is: %.3f" %data.value)
def addr(sa):
return Address(NodeId(sa, server_ns), server_uri)
def setUp(self):
# create a new ClientSettings instance and add the localhost to the URLs to discover
settings = pyuaf.client.settings.ClientSettings()
settings.discoveryUrls.append(ARGS.demo_url)
settings.applicationName = "client"
settings.logToStdOutLevel = ARGS.loglevel
self.client = MyClient(settings)
serverUri = ARGS.demo_server_uri
demoNsUri = ARGS.demo_ns_uri
opcUaNsIndex = 0 # the namespace index of nodes defined by the OPC UA specs is always 0
self.address_Demo = Address(
ExpandedNodeId("Demo", demoNsUri, serverUri))
self.address_Events = Address(
self.address_Demo,
[RelativePathElement(QualifiedName("Events", demoNsUri))])
self.address_Alarms = Address(
self.address_Events,
[RelativePathElement(QualifiedName("AlarmsWithNodes", demoNsUri))])
self.address_Alarm = Address(self.address_Alarms, [
RelativePathElement(QualifiedName("ExclusiveLevelAlarm",
demoNsUri))
])
self.address_Trigger = Address(self.address_Alarms, [
RelativePathElement(
QualifiedName("ExclusiveLevelAlarmTrigger", demoNsUri))
])
self.address_LowLow = Address(
self.address_Alarm,
[RelativePathElement(QualifiedName("LowLowLimit", opcUaNsIndex))])
self.address_Low = Address(
self.address_Alarm,
[RelativePathElement(QualifiedName("LowLimit", opcUaNsIndex))])
self.address_High = Address(
self.address_Alarm,
[RelativePathElement(QualifiedName("HighLimit", opcUaNsIndex))])
self.address_HighHigh = Address(self.address_Alarm, [
RelativePathElement(QualifiedName("HighHighLimit", opcUaNsIndex))
])
# start the simulation (otherwise the dynamic variables won't change)
res = self.client.read([
self.address_LowLow, self.address_Low, self.address_High,
self.address_HighHigh
])
self.assertTrue(res.overallStatus.isGood())
self.lowLowLimit = res.targets[0].data.value
self.lowLimit = res.targets[1].data.value
self.highLimit = res.targets[2].data.value
self.highHighLimit = res.targets[3].data.value
self.eventFilter = EventFilter()
self.eventFilter.selectClauses.resize(3)
self.eventFilter.selectClauses[0].attributeId = attributeids.Value
self.eventFilter.selectClauses[0].browsePath.append(
QualifiedName("Message", 0))
self.eventFilter.selectClauses[0].typeId = NodeId(
opcuaidentifiers.OpcUaId_BaseEventType, 0)
self.eventFilter.selectClauses[1].attributeId = attributeids.Value
self.eventFilter.selectClauses[1].browsePath.append(
QualifiedName("SourceName", 0))
self.eventFilter.selectClauses[1].typeId = NodeId(
opcuaidentifiers.OpcUaId_BaseEventType, 0)
self.eventFilter.selectClauses[2].attributeId = attributeids.Value
self.eventFilter.selectClauses[2].browsePath.append(
QualifiedName("Severity", 0))
self.eventFilter.selectClauses[2].typeId = NodeId(
opcuaidentifiers.OpcUaId_BaseEventType, 0)
# make sure the trigger has a default value
result = self.client.write([self.address_Trigger], [Double(50.0)])
# Check if the write failed due to a BadUserAccessDenied failure
# This appears to be the case for the UaServerCpp shipped with the Windows MSVS2008 demo SDK,
# probably a bug in the UaServerCpp.
if result.targets[0].status.opcUaStatusCode(
) == pyuaf.util.opcuastatuscodes.OpcUa_BadUserAccessDenied:
self.skipTest(
"Some old versions of the UaServerCpp have non-writeable triggers (bug in UaServerCpp?)"
)
Root_NodeId = NodeId(
OpcUaId_RootFolder,
OPCUA_NAMESPACE_URI) # namespace URI instead of namespace index
Root_NodeId = NodeId(OpcUaId_RootFolder, OPCUA_NAMESPACE_URI,
OPCUA_NAMESPACE_ID) # redundant namespace info, but valid
# NodeIds don't contain info about the server they are hosted by.
# If you specifically want to refer to a NodeId within a particular server, you need to
# use an ExpandedNodeId, which contains
# - a NodeId
# - and a serverUri
# Assume from now on that the particular nodes we want to refer to, are hosted by a server defined
# by the server URI "urn:UnifiedAutomation:UaDemoserver":
serverUri = "urn:UnifiedAutomation:UaDemoserver"
# Then we can refer to the Root node like this:
Root_Node = Address(Root_NodeId, serverUri)
# An absolute address can also be created directly from an ExpandedNodeId:
Root_Node = Address(
ExpandedNodeId(OpcUaId_RootFolder, OPCUA_NAMESPACE_ID, serverUri))
# within the Root folder, there is another standard node called the Objects folder:
Objects_Node = Address(NodeId(OpcUaId_ObjectsFolder, OPCUA_NAMESPACE_ID),
serverUri)
# we could also refer to the Objects node via a relative path!
# We can do this, since the standard Object node has a standard BrowseName.
# The following are all valid ways to define the BrowseName of the Objects node
Objects_BrowseName = QualifiedName("Objects", OPCUA_NAMESPACE_ID)
Objects_BrowseName = QualifiedName(
"Objects", OPCUA_NAMESPACE_URI) # namespace URI instead of index
Objects_BrowseName = QualifiedName(
from pyuaf.util import Status
from pyuaf.util import RelativePathElement
from pyuaf.util import QualifiedName
from pyuaf.util import primitives
from pyuaf.util import opcuaidentifiers
from pyuaf.util import opcuastatuscodes
from pyuaf.util.errors import UafError
# define the namespace URI and server URI of the UaDemoServer
demoNsUri = "http://www.unifiedautomation.com/DemoServer"
demoServerUri = "urn:UnifiedAutomation:UaServerCpp"
# define the addresses of some useful nodes
# (demoAddress is an absolute address, all the others are relative ones)
demoAddress = Address( NodeId("Demo", demoNsUri), demoServerUri )
simulationActiveAddress = Address( demoAddress, [RelativePathElement(QualifiedName("SimulationActive", demoNsUri))] )
startSimulationAddress = Address( demoAddress, [RelativePathElement(QualifiedName("StartSimulation" , demoNsUri))] )
historyAddress = Address( demoAddress, [RelativePathElement(QualifiedName("History", demoNsUri))] )
loggingActiveAddress = Address( historyAddress, [RelativePathElement(QualifiedName("DataLoggerActive", demoNsUri))] )
startLoggingAddress = Address( historyAddress, [RelativePathElement(QualifiedName("StartLogging", demoNsUri))] )
doubleAddress = Address( historyAddress, [RelativePathElement(QualifiedName("DoubleWithHistory", demoNsUri))] )
# define the ClientSettings:
settings = ClientSettings()
settings.applicationName = "MyClient"
settings.discoveryUrls.append("opc.tcp://localhost:48010")
# create the client
myClient = Client(settings)
# created according to the specified settings.
# If subscriptions need to be created to other servers, they will be created according to the
# defaultSubscriptionSettings settings.
# First of all, configure a client ...
clientSettings = ClientSettings()
clientSettings.applicationName = "MyClient"
clientSettings.discoveryUrls.append("opc.tcp://10.133.78.42")
clientSettings.discoveryUrls.append("opc.tcp://10.133.78.81")
clientSettings.discoveryUrls.append("opc.tcp://10.134.25.16")
# ... and create the client
myClient = Client(clientSettings)
# define some node addresses
temperature1 = Address(NodeId("temperature1", "MyCompanyNamespace"),
"Some/OPCUA/Server")
temperature2 = Address(NodeId("temperature2", "MyCompanyNamespace"),
"Some/OPCUA/Server")
pressure0005 = Address(NodeId("pressure0005", "MyCompanyNamespace"),
"My/Slow/Device/Server")
motorStatus3 = Address(NodeId("motorStatus3", "MyCompanyNamespace"),
"My/Fast/PLC/Server")
safetyValve5 = Address(NodeId("safetyValve5", "MyCompanyNamespace"),
"My/Fast/PLC/Server")
# now we can monitor any variables or events without worrying about the settings of the subscriptions!
# monitor the 4 variables
myCreateMonitoredDataResult = myClient.createMonitoredData(
[temperature1, temperature2, pressure0005, motorStatus3],
subscriptionConfig=cfg)
for line in msg.message.splitlines():
f.write("%s: %s\n" % (logDetailsString, line))
# Example 0: create a client with the default settings and no logging callback
# --------------------------------------------------------------------------------------------------
client0 = Client()
# Example 1: create a client by specifying the settings
# --------------------------------------------------------------------------------------------------
client1 = Client(settings)
# Example 2: create a client by specifying the settings
# --------------------------------------------------------------------------------------------------
client2 = Client(settings, callback)
# Example 3: create a client by specifying only the logging callback
# --------------------------------------------------------------------------------------------------
client3 = Client(loggingCallback=callback)
# you can still provide settings and register a logging callback afterwards, but you'll need to use:
# client0.setClientSettings(settings)
# client0.registerLoggingCallback(callback)
# read the Value attribute of some non-existing node in order to have some Error output sent to the callback:
client2.read([
Address(NodeId("InvalidIdentifier", "InvalidNamespace"),
"InvalidServerURI")
])
f.close()
from pyuaf.client import Client
from pyuaf.client.settings import ClientSettings, SessionSettings
from pyuaf.util import Address, NodeId, opcuaidentifiers
import uao
server_uri = 'urn:CERN:QuasarOpcUaServer' # needs to match the factual server URI
server_address = 'opc.tcp://127.0.0.1:4841'
cs = ClientSettings("myClient", [server_address])
client = Client(cs)
# next 2 lines are not necessary but help to ensure good state of OPC-UA connectivity
rootNode = Address(NodeId(opcuaidentifiers.OpcUaId_RootFolder, 0), server_uri)
result = client.browse([rootNode])
session = uao.Session(client, server_uri)
obj = session.get_object('anObject',
2) # needs to match factuall existing object
print(
"Step 3: Specify the addresses to some nodes which we would like to read/write/browse/monitor/call/..."
)
print(
"################################################################################################################"
)
print("")
# There are *many* ways how you can identify (address) a node, see the examples below:
# 1) absolute address to the standard OPC UA "RootFolder" node (notice the standard OPC UA index 0)
# 2) absolute address to the non-standard "Demo" node (notice the demo server namespace URI)
# 3) absolute address to the non-standard "BoilerDemo" node (notice that we use an ExpandedNodeId this time)
# 4) relative address to the "Boiler1" node (relative to the previous address)
# 5) relative address to the "TemperatureSetpoint" Double variable (relative to the previous relative (!!!) address)
# 6) relative address to the "HeaterStatus" node (relative to the standard "Root" folder)
address_Root = Address(NodeId(OpcUaId_RootFolder, 0), demoServerUri)
address_Demo = Address(NodeId("Demo", demoNsUri), demoServerUri)
address_BoilerDemo = Address(
ExpandedNodeId("Demo.BoilerDemo", demoNsUri, demoServerUri))
address_Boiler1 = Address(
address_BoilerDemo,
[RelativePathElement(QualifiedName("Boiler1", demoNsUri))])
address_TSetpoint = Address(
address_Boiler1,
[RelativePathElement(QualifiedName("TemperatureSetPoint", demoNsUri))])
address_HeaterStatus = Address(address_Root, [
RelativePathElement(QualifiedName("Objects", 0)),
RelativePathElement(QualifiedName("Demo", demoNsUri)),
RelativePathElement(QualifiedName("BoilerDemo", demoNsUri)),
RelativePathElement(QualifiedName("Boiler1", demoNsUri)),
RelativePathElement(QualifiedName("HeaterStatus", demoNsUri))
)
print(
"# #"
)
print(
"# 2) Read a matrix #"
)
print(
"# #"
)
print(
"#******************************************************************************#"
)
# define the address of the matrix which we would like to read
address = Address(NodeId("Demo.Static.Matrix.Int32", demoNamespaceUri),
demoServerUri)
# try to read it
result = myClient.read([address])
if not result.overallStatus.isGood():
sys.exit("The matrix could not be read: %s" % result.targets[0].status)
# ok we expect to have a matrix:
matrix = result.targets[0].data
if not type(matrix) == Matrix:
sys.exit("Wrong type: %s" % type(matrix))
# print the matrix:
printMatrix(matrix)
from pyuaf.client import Client
from pyuaf.client.settings import ClientSettings
from pyuaf.util import EventFilter
from pyuaf.util import Address, NodeId, QualifiedName
from pyuaf.util import ExtensionObject, ModelChangeStructureDataType
from pyuaf.util import primitives
from pyuaf.util.errors import UafError
from pyuaf.util import opcuaidentifiers
# define the namespace URI and server URI of the UaDemoServer
demoNsUri = "http://www.unifiedautomation.com/DemoServer"
demoServerUri = "urn:UnifiedAutomation:UaServerCpp"
# define some addresses which will be used later on
address_Server = Address( NodeId(opcuaidentifiers.OpcUaId_Server , 0), demoServerUri )
address_Dynamic = Address( NodeId("Demo.DynamicNodes" , demoNsUri), demoServerUri )
address_Create = Address( NodeId("Demo.DynamicNodes.CreateDynamicNode", demoNsUri), demoServerUri )
address_Delete = Address( NodeId("Demo.DynamicNodes.DeleteDynamicNode", demoNsUri), demoServerUri )
# define the ClientSettings:
settings = ClientSettings()
settings.applicationName = "MyClient"
settings.discoveryUrls.append("opc.tcp://localhost:48010")
# create the client
myClient = Client(settings)
# define the event filter to only receive the GeneralModelChangeEventType events
eventFilter = EventFilter()
eventFilter.selectClauses.resize(1)
# examples/pyuaf/client/easiest_client_example.py
# Start the demo server ($SDK/bin/uaservercpp) of Unified Automation before running this script!
import pyuaf
from pyuaf.util import Address, NodeId
from pyuaf.client import Client
from pyuaf.client.settings import ClientSettings
# create a client named "myClient", and provide the discovery URL of the server (uaservercpp):
myClient = Client(ClientSettings("myClient", ["opc.tcp://localhost:48010"]))
# specify the address of the node of which we would like to read its Value attribute:
# (here we're using an absolute address, i.e. a NodeId(<identifier>, <namespace URI>) and a <server URI>)
someAddress = Address(
NodeId(
"Demo.SimulationSpeed", # NodeId identifier
"http://www.unifiedautomation.com/DemoServer"), # NodeId namespace URI
"urn:UnifiedAutomation:UaServerCpp") # server URI
# read the Value attribute of the node that we just addressed:
result = myClient.read([someAddress])
print("The value is %d" % result.targets[0].data.value)
