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import sys

sys.path.insert(0, "..")

import time

import logging

from opcua import Client

from opcua import ua

class SubHandler(object):

"""

Client to subscription. It will receive events from server

"""

def datachange_notification(self, node, val, data):

print("Python: New data change event", node, val)

def event_notification(self, event):

print("Python: New event", event)

if __name__ == "__main__":

#from IPython import embed

logging.basicConfig(level=logging.DEBUG)

client = Client("opc.tcp://localhost:53530/OPCUA/SimulationServer/")

#client = Client("opc.tcp://olivier:olivierpass@localhost:53530/OPCUA/SimulationServer/")

#client.set_security_string("Basic256Sha256,SignAndEncrypt,certificate-example.der,private-key-example.pem")

try:

client.connect()

root = client.get_root_node()

print("Root is", root)

print("childs of root are: ", root.get_children())

print("name of root is", root.get_browse_name())

objects = client.get_objects_node()

print("childs og objects are: ", objects.get_children())

myfloat = client.get_node("ns=4;s=Float")

mydouble = client.get_node("ns=4;s=Double")

myint64 = client.get_node("ns=4;s=Int64")

myuint64 = client.get_node("ns=4;s=UInt64")

myint32 = client.get_node("ns=4;s=Int32")

myuint32 = client.get_node("ns=4;s=UInt32")

var = client.get_node(ua.NodeId("Random1", 5))

print("var is: ", var)

print("value of var is: ", var.get_value())

var.set_value(ua.Variant([23], ua.VariantType.Double))

print("setting float value")

myfloat.set_value(ua.Variant(1.234, ua.VariantType.Float))

print("reading float value: ", myfloat.get_value())

handler = SubHandler()

sub = client.create_subscription(500, handler)

handle = sub.subscribe_data_change(var)

device = objects.get_child(["2:MyObjects", "2:MyDevice"])

method = device.get_child("2:MyMethod")

result = device.call_method(method, ua.Variant("sin"), ua.Variant(180, ua.VariantType.Double))

print("Mehtod result is: ", result)

#embed()

time.sleep(3)

sub.unsubscribe(handle)

sub.delete()

#client.close_session()

finally:

client.disconnect()