esp8266: split twin callback for device settings and ease ESP WD

ESP8266/src/iotc/arduino/iotc.cpp

@@ -213,13 +213,15 @@ int getHubHostName(IOTContextInternal* internal, const char* dpsEndpoint,
   int retval = 0;
   if ((retval = _getOperationId(internal, dpsEndpoint, scopeId, deviceId,
                                 *authHeader, *operationId, NULL)) == 0) {
-    WAITMS(5000);
+    WAITMS(2500);
     IOTC_LOG(F("- iotc.dps : getting host name..."));
+    WAITMS(2500);
     for (int i = 0; i < 5; i++) {
       retval = _getOperationId(internal, dpsEndpoint, scopeId, deviceId,
                                *authHeader, *operationId, hostName);
       if (retval == 0) break;
       WAITMS(3000);
+      IOTC_LOG(F("- iotc.dps : getting host name...")); // re-trigger WD
     }
   }
 

ESP8266/src/iotc/common/iotc_internal.cpp

@@ -334,9 +334,13 @@ static void deviceTwinGetStateCallback(AzureIOT::StringBuffer &topicName,
     return;
   }
 
-  jsobject_t desired;
+  jsobject_t desired, outDesired, outReported;
   jsobject_initialize(&desired, *payload, payload.getLength());
 
+  if (jsobject_get_object_by_name(&desired, "desired", &outDesired) != -1 &&
+      jsobject_get_object_by_name(&desired, "reported", &outReported) != -1) {
+    callDesiredCallback(internal, topicName, "twin", payload);
+  } else {
     for (unsigned i = 0, count = jsobject_get_count(&desired); i < count;
         i += 2) {
       char *itemName = jsobject_get_name_at(&desired, i);
@@ -345,8 +349,10 @@ static void deviceTwinGetStateCallback(AzureIOT::StringBuffer &topicName,
       }
       if (itemName) IOTC_FREE(itemName);
     }
-
+  }
+  jsobject_free(&outReported);
   jsobject_free(&desired);
+  jsobject_free(&outDesired);
 }
 
 void handlePayload(char *msg, unsigned long msg_length, char *topic,