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anthony11-Visitor
1-Visitor
June 25, 2015
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How to start a service from C SDK?

  • June 25, 2015
  • 1 reply
  • 1736 views

Hi,

I would like to call a service of my thing on Thingworx from my C program created with the model C SDK. I already tried to use the function "twApi_InvokeService" but it doesn't work. If someone can give me more explanations about this function.

I am using Thingworx 6.0.1 and the C SDK

Regards,

Anthony

      Best answer by christianb1

      Have you checked the debug output of the c application?

      Here is a simple example how to call a SteamSensors service named "CountDataCollectionTasks"

      ...

      // in void dataCollectionTask of SteamSensor example

      int res = 0;

      twInfoTable * values = NULL;

      twInfoTable * result = NULL;

      values = twInfoTable_Create(twDataShape_Create(twDataShapeEntry_Create("values", NULL, TW_INFOTABLE)));

      res = twApi_InvokeService(TW_THING, thingName, "CountDataCollectionTasks", values, &result, -1, FALSE);

      TW_LOG(TW_INFO, "invokeService: %d", res);

      // we are responsible to clean the result

      twInfoTable_Delete(values);

      twInfoTable_Delete(result);

      ...

      in api/twApi.c is an example how the twApi_PushProperties invokes the "UpdateSubscribedPropertyValues" service of the thing.

      Do not forget to create the service in TWX at your Thing.

      1 reply

      C
      christianb11-VisitorAnswer
      1-Visitor
      June 25, 2015

      Have you checked the debug output of the c application?

      Here is a simple example how to call a SteamSensors service named "CountDataCollectionTasks"

      ...

      // in void dataCollectionTask of SteamSensor example

      int res = 0;

      twInfoTable * values = NULL;

      twInfoTable * result = NULL;

      values = twInfoTable_Create(twDataShape_Create(twDataShapeEntry_Create("values", NULL, TW_INFOTABLE)));

      res = twApi_InvokeService(TW_THING, thingName, "CountDataCollectionTasks", values, &result, -1, FALSE);

      TW_LOG(TW_INFO, "invokeService: %d", res);

      // we are responsible to clean the result

      twInfoTable_Delete(values);

      twInfoTable_Delete(result);

      ...

      in api/twApi.c is an example how the twApi_PushProperties invokes the "UpdateSubscribedPropertyValues" service of the thing.

      Do not forget to create the service in TWX at your Thing.

      A
      anthony11-VisitorAuthor
      1-Visitor
      June 26, 2015

      Thank you, it works fine now .

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