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client_to_kepware.py
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client_to_kepware.py
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import sys
sys.path.insert(0, "..")
import logging
from opcua import Client
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.WARN)
client = Client("opc.tcp://192.168.56.100:49320/OPCUA/SimulationServer/")
#client = Client("opc.tcp://192.168.56.100:4840/OPCUA/SimulationServer/")
#client = Client("opc.tcp://olivier:olivierpass@localhost:53530/OPCUA/SimulationServer/")
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())
tag1 = client.get_node("ns=2;s=Channel1.Device1.Tag1")
print("tag1 is: {0} with value {1} ".format(tag1, tag1.get_value()))
tag2 = client.get_node("ns=2;s=Channel1.Device1.Tag2")
print("tag2 is: {0} with value {1} ".format(tag2, tag2.get_value()))
handler = SubHandler()
sub = client.create_subscription(500, handler)
handle1 = sub.subscribe_data_change(tag1)
handle2 = sub.subscribe_data_change(tag2)
from IPython import embed
embed()
sub.unsubscribe(handle1)
sub.unsubscribe(handle2)
sub.delete()
finally:
client.disconnect()