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import asyncio |
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import logging |
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from asyncua import ua |
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from asyncua.server import Server, EventGenerator |
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logging.basicConfig(level=logging.INFO) |
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_logger = logging.getLogger('asyncua') |
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async def main(): |
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server = Server() |
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await server.init() |
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server.set_endpoint("opc.tcp://0.0.0.0:4840/freeopcua/server/") |
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# setup our own namespace, not really necessary but should as spec |
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uri = "http://examples.freeopcua.github.io" |
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idx = await server.register_namespace(uri) |
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# populating our address space |
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myobj = await server.nodes.objects.add_object(idx, "MyObject") |
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# Creating a custom event: Approach 1 |
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# The custom event object automatically will have members from its parent (BaseEventType) |
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etype = await server.create_custom_event_type( |
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idx, 'MyFirstEvent', ua.ObjectIds.BaseEventType, |
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[('MyNumericProperty', ua.VariantType.Float), |
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('MyStringProperty', ua.VariantType.String)] |
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) |
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myevgen = await server.get_event_generator(etype, myobj) |
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# Creating a custom event: Approach 2 |
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custom_etype = await server.nodes.base_event_type.add_object_type(2, 'MySecondEvent') |
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await custom_etype.add_property(2, 'MyIntProperty', ua.Variant(0, ua.VariantType.Int32)) |
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await custom_etype.add_property(2, 'MyBoolProperty', ua.Variant(True, ua.VariantType.Boolean)) |
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mysecondevgen = await server.get_event_generator(custom_etype, myobj) |
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async with server: |
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count = 0 |
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while True: |
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await asyncio.sleep(1) |
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myevgen.event.Message = ua.LocalizedText("MyFirstEvent %d" % count) |
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myevgen.event.Severity = count |
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myevgen.event.MyNumericProperty = count |
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myevgen.event.MyStringProperty = "Property %d" % count |
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myevgen.trigger() |
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mysecondevgen.trigger(message="MySecondEvent %d" % count) |
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count += 1 |
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if __name__ == "__main__": |
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asyncio.run(main()) |
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FreeOpcUa /
opcua-asyncio
