publish json data

opcua2mqtt/DataObject.py

@@ -1,5 +1,5 @@
 import re
-
+import json
 
 class InvalidDataObjectException(Exception):
     def __init__(self, message):
@@ -21,4 +21,10 @@ class DataObject(object):
         return self.serverName + '/' + str(self.nameSpaceIndex) + '/' + self.variableName
 
     def getPayload(self):
-        return self.value
+        payload = {
+            "serverName": self.serverName,
+            "nameSpaceIndex": self.nameSpaceIndex,
+            "variableName": self.variableName,
+            "value": self.value
+        }
+        return json.dumps(payload)

opcua2mqtt/OpcUaRequester.py

@@ -16,6 +16,7 @@ class OpcUaRequester(threading.Thread):
         self.url = self.config['url']
         self.nodes = self.config['nodes']
         self.delay = self.config['delay']
+        self.timeout = self.config['timeout']
 
         # consider this flag in the localLoop
         self.killBill = False
@@ -25,7 +26,7 @@ class OpcUaRequester(threading.Thread):
     async def opcUaRequesterInnerLoop(self):
         while not self.killBill:
             try:
-                async with Client(url=self.url, timeout=10.0) as client:
+                async with Client(url=self.url, timeout=self.timeout) as client:
                     for nodeSpec in self.nodes:
                         try:
                             logger.debug(f"Trying {self.name} {self.url} ns={nodeSpec['ns']};{nodeSpec['n']}")

opcua2mqtt/config.json

@@ -10,11 +10,12 @@
             "url": "opc.tcp://172.16.3.60:4840",
             "name": "apl",
             "delay": 1.0,
+            "timeout": 1.0,
             "nodes": [
                 { "ns": 0, "n": "i=345", "d": "pv" },
                 { "ns": 0, "n": "i=348", "d": "sv" },
                 { "ns": 0, "n": "i=351", "d": "tv" },
-                { "ns": 0, "n": "i=35400", "d": "qv" }
+                { "ns": 0, "n": "i=354", "d": "qv" }
             ]
         },
         {
@@ -22,6 +23,7 @@
             "url": "opc.tcp://192.168.254.5:4863",
             "name": "sh",
             "delay": 1.0,
+            "timeout": 10.0,
             "nodes": [
                 { "ns": 1, "n": "s=A201CD124/MOT_01.AV_Out#Value", "d": "A201CD124" },
                 { "ns": 1, "n": "s=A201CJ003/PID_01.PV_Out#Value", "d": "A201CJ003" },