azure - 如何将结构添加到 Azure IoT Central 自定义应用程序

Question

我在 Azure IoT Central 中有一个自定义应用程序。我已经创建了我的设备，并且可以使用基本数据类型（bool、float、int）发送数据。

从 C api 看起来有一种机制来声明一个结构，将其添加到模型中，然后发送该数据。所以我做到了，我看到确认我的消息正在发送和接收，但没有数据显示......所以我猜你不能真正声明一个结构并发送它，或者我没有它在 Azure 端正确配置，但我没有找到任何可以帮助的文档。

BEGIN_NAMESPACE(AzureModel);

DECLARE_STRUCT(MyData,
        int, num1,
        float, num2,
        int, num3);

DECLARE_MODEL(Azure1_t,
WITH_DATA(ascii_char_ptr, deviceId),
WITH_DATA(int, messageId),
WITH_DATA(MyData, myData),
WITH_DATA(EDM_DATE_TIME_OFFSET, ts),
/* Methods */
WITH_METHOD(Reboot),
WITH_METHOD(Quit),
WITH_METHOD(FirmwareUpdate, ascii_char_ptr, FwPackageUri),
/* Register Direct Methods with IoT Hub */
WITH_REPORTED_PROPERTY(ascii_char_ptr_no_quotes, SupportedMethods),
/* Telemetry Interval in Seconds... value from 1 to: 0xFFFF/2000 = About 30 Seconds */
WITH_REPORTED_PROPERTY(int,TelemetryInterval),
WITH_REPORTED_PROPERTY(ascii_char_ptr,AzureStatus),
WITH_REPORTED_PROPERTY(ascii_char_ptr, AzureFwVersion)
);

END_NAMESPACE(AzureModel);

Azure1_t *Azure1;

static void SendData(void)
{
     EVENT_INSTANCE *messages;
      unsigned char* destination;
      size_t destinationSize;
      time_t now;

      /* Read the Time  from RTC */
        now = TimingSystemGetSystemTime();
        /* Time Stamp */
        Azure1->ts = GetDateTimeOffset(now);

      messages = (EVENT_INSTANCE *) calloc(1,sizeof(EVENT_INSTANCE));
      if(messages==NULL) {
        AZURE_PRINTF("Err: Allocating Memory for messages to IoT Hub\r\n");
        HAL_NVIC_SystemReset();
      } else {
        messages->this = (void *)messages;
      }

      SentMessagesCount++;
      Azure1->messageId = messages->messageTrackingId = SentMessagesCount;

      if (SERIALIZE(&destination, &destinationSize,
                    Azure1->deviceId,
                    Azure1->messageId,
                    Azure1->myData,
                    Azure1->ts) != CODEFIRST_OK){
        AZURE_PRINTF("Err: Failed to serialize\r\n");
      }
      else
      {
          /* Only for Debug */
          //AZURE_PRINTF("MessageToSend=%.*s\r\n",destinationSize,destination);

          if ((messages->messageHandle = IoTHubMessage_CreateFromByteArray(destination, destinationSize)) == NULL) {
            AZURE_PRINTF("Err: iotHubMessageHandle is NULL!\r\n");
          } else {
            char msgText[32];
            MAP_HANDLE propMap = IoTHubMessage_Properties(messages->messageHandle);
            sprintf_s(msgText, sizeof(msgText), "PropMsg_%zu", SentMessagesCount);
            if (Map_AddOrUpdate(propMap, "PropName", msgText) != MAP_OK){
              AZURE_PRINTF("Err: Map_AddOrUpdate Failed!\r\n");
            }
            if (IoTHubClient_LL_SendEventAsync(iotHubClientHandle, messages->messageHandle, SendConfirmationCallback, messages) != IOTHUB_CLIENT_OK) {
              AZURE_PRINTF("Err: IoTHubClient_LL_SendEventAsync..........FAILED!\r\n");
            } else {
              AZURE_PRINTF("IoTHubClient_LL_SendEventAsync accepted message [%d] for transmission to IoT Hub.\r\n", SentMessagesCount);
            }
            free(destination);
          }
          IoTHubMessage_Destroy(messages->messageHandle);
      }
}

Azure 配置