readme and fix in structured mode

src/OpcUaRequester.py

@@ -17,7 +17,7 @@ class OpcUaRequester(threading.Thread):
         self.name = self.config['name']
         self.url = self.config['url']
         self.nodes = self.config['nodes']
-        self.delay = self.config['delay']
+        self.period = self.config['period']
         self.timeout = self.config['timeout']
         self.dataObjectType = self.config['type']
         self.flat = self.dataObjectType == 'flat'
@@ -49,7 +49,7 @@ class OpcUaRequester(threading.Thread):
                             logger.error(f"UaError in inner OPC-UA loop: {type(e)} {e}")
                     if not self.flat:
                         self.queue.put(dataObject)
-                await asyncio.sleep(self.delay)
+                await asyncio.sleep(self.period)
             except asyncio.exceptions.TimeoutError as e:
                 self.stats.incOpcUaTimeouts()
                 logger.error(f"Timeout in inner OPC-UA loop")

src/StructuredDataObject.py

@@ -6,10 +6,10 @@ from AbstractDataObject import AbstractDataObject
 class StructuredDataObject(AbstractDataObject):
     def __init__(self, topicPart):
         super().__init__(topicPart)
-        self.keyValuePairs = []
+        self.keyValuePairs = {}
 
     def add(self, key, value):
-        self.keyValuePairs.append({key: value})
+        self.keyValuePairs[key] =  value
 
     def getPayload(self):
         return json.dumps(self.keyValuePairs)

src/config.json

@@ -11,10 +11,10 @@
     "opcua": [
         {
             "enabled": "true",
-            "type": "flat",
+            "type": "structured",
             "url": "opc.tcp://172.16.3.60:4840",
             "name": "apl",
-            "delay": 1.0,
+            "period": 1.0,
             "timeout": 1.0,
             "nodes": [
                 { "ns": 0, "n": "i=345", "d": "pv" },
@@ -28,7 +28,7 @@
             "type": "flat",
             "url": "opc.tcp://192.168.254.5:4863",
             "name": "sh",
-            "delay": 1.0,
+            "period": 1.0,
             "timeout": 10.0,
             "nodes": [
                 { "ns": 1, "n": "s=t|SERVER::A201CD124/MOT_01.AV_Out#Value", "d": "A201CD124" },