update

asyncua server.py

+import asyncio
+from asyncua import ua, Server
+import random
+
+async def main():
+    # create a server
+    server = Server()
+    await server.init()
+    # set endpoint information
+    url = "opc.tcp://localhost:4840/myopc/free"
+    server.set_endpoint(url)
+    # create a new address space
+    uri = "http://klopc.com"
+    idx = await server.register_namespace(uri)
+    obj = await server.nodes.objects.add_object(idx, "MyObject")
+    var = await obj.add_variable(idx, "MyVariable", 0)
+    await var.set_writable()
+
+    # start the server
+    await server.start()
+
+    try:
+        # keep the server running until interrupted
+        while True:
+            await var.write_value(random.randint(1, 100))
+            await asyncio.sleep(1)
+    finally:
+        # stop the server
+        await server.stop()
+
+if __name__ == "__main__":
+    asyncio.run(main())