Hub 控制

遵循資料模型的程式碼產生器中的指示來產生低階 C 程式碼。

遵循整合終端裝置 SDK 中的指示，以：

1. 設定建置環境

   在 Amazon Linux 2023/x86_64 上建置程式碼做為您的開發主機。安裝必要的建置相依性：

   dnf install make gcc gcc-c++ cmake

2. 開發硬體回呼函數

   實作硬體回呼函數之前，請先了解 API 的運作方式。此範例使用 On/Off 叢集和 OnOff 屬性來控制裝置函數。如需 API 詳細資訊，請參閱 低階 C-Function APIs。

   struct DeviceState
   {
     struct iotmiDev_Agent *agent;
     struct iotmiDev_Endpoint *endpointLight;
     /* This simulates the HW state of OnOff */
     bool hwState;   
   };
   
   /* This implementation for OnOff getter just reads
      the state from the DeviceState */
   iotmiDev_DMStatus exampleGetOnOff(bool *value, void *user)
   {
      struct DeviceState *state = (struct DeviceState *)(user);
     *value = state->hwState;
     return iotmiDev_DMStatusOk;
   }

3. 設定端點和掛接硬體回呼函數

   實作函數之後，請建立端點並註冊您的回呼。完成這些任務：

   1. 建立裝置代理程式

   2. 為您要支援的每個叢集結構填入回呼函數點

   3. 設定端點並註冊支援的叢集

   struct DeviceState
   {
       struct iotmiDev_Agent * agent;
       struct iotmiDev_Endpoint *endpoint1;
   
       /* OnOff cluster states*/
       bool hwState;
   };
   
   
   /* This implementation for OnOff getter just reads
      the state from the DeviceState */
   iotmiDev_DMStatus exampleGetOnOff( bool * value, void * user )
   {
       struct DeviceState * state = ( struct DeviceState * ) ( user );
       *value = state->hwState;
       printf( "%s(): state->hwState: %d\n", __func__, state->hwState );
       return iotmiDev_DMStatusOk;
   }
   
   iotmiDev_DMStatus exampleGetOnTime( uint16_t * value, void * user )
   {
       *value = 0;
       printf( "%s(): OnTime is %u\n", __func__, *value );
       return iotmiDev_DMStatusOk;
   }
   
   iotmiDev_DMStatus exampleGetStartUpOnOff( iotmiDev_OnOff_StartUpOnOffEnum * value, void * user )
   {
       *value = iotmiDev_OnOff_StartUpOnOffEnum_Off;
       printf( "%s(): StartUpOnOff is %d\n", __func__, *value );
       return iotmiDev_DMStatusOk;
   }
   
   void setupOnOff( struct DeviceState *state )
   {
       struct iotmiDev_clusterOnOff clusterOnOff = {
           .getOnOff = exampleGetOnOff,
           .getOnTime = exampleGetOnTime,
           .getStartUpOnOff = exampleGetStartUpOnOff,
       };
       iotmiDev_OnOffRegisterCluster( state->endpoint1,
                                       &clusterOnOff,
                                       ( void * ) state);
   }
   
   
   /* Here is the sample setting up an endpoint 1 with OnOff
      cluster. Note all error handling code is omitted. */
   void setupAgent(struct DeviceState *state)
   {
       struct iotmiDev_Agent_Config config = {
           .thingId = IOTMI_DEVICE_MANAGED_THING_ID,
           .clientId = IOTMI_DEVICE_CLIENT_ID,
       };
       iotmiDev_Agent_InitDefaultConfig(&config);
   
       /* Create a device agent before calling other SDK APIs */
       state->agent = iotmiDev_Agent_new(&config);
       
       /* Create endpoint#1 */
       state->endpoint1 = iotmiDev_Agent_addEndpoint( state->agent,
                                                       1,
                                                       "Data Model Handler Test Device",
                                                       (const char*[]){ "Camera" },
                                                       1 );
       setupOnOff(state);
   }
   

將程式碼產生的檔案移至 example 資料夾：

cp codegen/out/* example/dm

若要建置中樞控制，請執行下列命令：

cd <hub-control-root-folder>

mkdir build

cd build

cmake -DBUILD_EXAMPLE_WITH_MQTT_PROXY=ON -DIOTMI_USE_MANAGED_INTEGRATIONS_DEVICE_LOG=ON ..

cmake -build .

使用中樞上的 MQTTProxy 元件執行範例，並執行 HubOnboarding和 MQTTProxy元件。

./examples/iotmi_device_sample_camera/iotmi_device_sample_camera