Get All Events Message - BaseEventType

[rafaelmoraes33]

Hello, I'm trying to find some way to read values from the BaseEventType variable type.

I have to create a routine where every minute I check if there is a new event and get the columns, Message, Time and Severity.

With normal variable type I can do it perfectly.

I would greatly appreciate the help.

Thanks

[schroeder-]

You need to use subscription of events. See https://github.com/FreeOpcUa/python-opcua/blob/master/examples/client-events.py

[rafaelmoraes33]

Hi!!

I'm using this example, but it's giving this error.

Would you help me?

Thanks

[schroeder-]

I condenst the example a bit more.... :

class SubHandler(object):

    """
    Subscription Handler. To receive events from server for a subscription
    data_change and event methods are called directly from receiving thread.
    Do not do expensive, slow or network operation there. Create another
    thread if you need to do such a thing
    """
    def event_notification(self, event):
        print("New event recived: ", event)


if __name__ == "__main__":

    client = Client("opc.tcp://localhost:4840/freeopcua/server/")
    # client = Client("opc.tcp://admin@localhost:4840/freeopcua/server/") #connect using a user
    try:
        client.connect()
        msclt = SubHandler()
        sub = client.create_subscription(100, msclt)
        handle = sub.subscribe_events()
        embed()
        sub.unsubscribe(handle)
        sub.delete()
    finally:
        client.disconnect()