Arduino Azure IoT hub communications

ArduinoAzure.c

// Define the Model
BEGIN_NAMESPACE(IoTSample);
DECLARE_MODEL
(LightSensorDataModel, 
WITH_DATA(ascii_char_ptr, deviceId), 
WITH_DATA(int, iotdata),
WITH_ACTION(DuckAction, int, light)
);
END_NAMESPACE(IoTSample);

// for recieving message from IoT hub add action
// Could be called when you send JSON like {"Name" : "DuckAction", "Parameters" : {"light":1}}
EXECUTE_COMMAND_RESULT DuckAction(LightSensorDataModel* device, int light)
{
    (void)printf("Duck action %d \r\n",light);
    digitalWrite(2, light);
    return EXECUTE_COMMAND_SUCCESS;
}


//  for sending message to IoT hub 
//  add into void simplesample_http_run(void)
while (1)
{
   myIoTdata->deviceId = "ArduinoAzureTwin";
   myIoTdata->iotdata = analogRead(1);  // getting some info from pin 1

   unsigned char* destination;
   size_t destinationSize;
   if (SERIALIZE(&destination, &destinationSize, myIoTdata->deviceId, myIoTdata->iotdata) != CODEFIRST_OK)
   {
       (void)printf("Failed to serializern");
   }
   else
   {
        sendMessage(iotHubClientHandle, destination, destinationSize);
   }
   IoTHubClient_LL_DoWork(iotHubClientHandle);
   ThreadAPI_Sleep(1000);
}

DESTROY_MODEL_INSTANCE(myIoTdata);