subscription experiments

snippets/test4.py

@@ -0,0 +1,32 @@
+import asyncio
+from asyncua import Client
+
+
+
+NODE_IDS = [
+    'ns=0;i=345',
+    'ns=0;i=348',
+    'ns=0;i=351',
+    'ns=0;i=354'
+]
+URL = 'opc.tcp://172.16.3.60:4840'
+
+
+class SubscriptionHandler:
+    def datachange_notification(self, node, val, data):
+        print(f"received: {node=}, {val=}, {data=}")
+
+async def test():
+    client = Client(url=URL, timeout=10.0)
+    # await client.set_security_string('')
+    async with client:
+        subscription = await client.create_subscription(500, SubscriptionHandler())
+        nodes = [ client.get_node(n) for n in NODE_IDS ]
+        await subscription.subscribe_data_change(nodes)
+        await asyncio.sleep(300)
+        await subscription.delete()
+
+
+
+asyncio.run(test())
+

src/config.json

@@ -11,7 +11,7 @@
     "opcua": [
         {
             "enabled": "true",
-            "type": "flat",
+            "type": "structured",
             "url": "opc.tcp://172.16.3.60:4840",
             "name": "apl",
             "period": 1.0,