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1. Write the API to switch the bulb on. Once WSO2 IoTS receives the command it will call the API you have written to switch the bulb on.

   Info
   For more more information, see Writing Device APIs.

2. Define the operation type for the API in the <DEVICE_TYPE>SeviceImpl.java file. WSO2 IoTS supports the following 4 operation types.

   • POLICY
   • COMMAND
   • CONFIG
   • PROFILE

   Example: The RaspberryPiServiceImpl.java file has configured the bulb switching on and off API as a COMMAND operation.

   Code Block
   Operation commandOp = new CommandOperation(); commandOp.setCode("bulb"); commandOp.setType(Operation.Type.COMMAND); commandOp.setEnabled(true); commandOp.setPayLoad(actualMessage);

3. The command then get's stored in the database for monitoring purposes and gets sent to push notifications. 

   Note
   Don't he The default push notification providers in WSO2 IoT Server don't meet your requirement? You can If not, create your own push notification in WSO2 IoT Server. For more information, see Adding a New Push Notification Provider.

   • The push notification method is implemented in the device plugin deviceManagerService.java file.
     Example: RaspberrypiManagerService.java

     Code Block

     private PushNotificationConfig populatePushNotificationConfig() { DeviceManagementConfiguration deviceManagementConfiguration = RaspberrypiManagementDataHolder.getInstance() .getDeviceTypeConfigService().getConfiguration(RaspberrypiConstants.DEVICE_TYPE, RaspberrypiConstants.DEVICE_TYPE_PROVIDER_DOMAIN); org.wso2.carbon.device.mgt.iot.devicetype.config.PushNotificationConfig sourceConfig = deviceManagementConfiguration.getPushNotificationConfig(); Map < String, String > staticProps = new HashMap < > (); for (org.wso2.carbon.device.mgt.iot.devicetype.config.PushNotificationConfig.Property property: sourceConfig.getProperties()) { staticProps.put(property.getName(), property.getValue()); } return new PushNotificationConfig(sourceConfig.getPushNotificationProvider(), staticProps); }

     Info
     You can define the control type and other statistics for the push notification to take place.

   • Configure and save the file containing the statisticsProps configurations anywhere you prefer. 
     Example: The statisticProps for the virtual fire alarm are defined in the <IoTS_HOME>/repository/conf/etc/device-mgt-plugins/raspberrypi-config.xml file.

     Code Block

     <PushNotificationConfiguration> <!--MQTT Config--> <PushNotificationProvider>MQTT</PushNotificationProvider> <Properties> <Property Name="mqtt.adapter.name">raspberrypi.mqtt.adapter</Property> <Property Name="url">tcp://localhost:1883</Property> <Property Name="username">admin</Property> <Property Name="dcrUrl">https://localhost:9443/dynamic-client-web/register</Property> <Property Name="qos">0</Property> <Property Name="scopes" /> <Property Name="clearSession">true</Property> </Properties> </PushNotificationConfiguration>

     Note
     Make sure to define the dcURL for the transport.

4. The command is then sent to the device.
   Follow the steps given below to find out if the device received the command: 

   1. Sign in to the WSO2 IoTS device management console.

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      Panel borderColor #6A98FA bgColor #ffffff borderWidth 1 Insert excerpt Quick Start Guide Quick Start Guide nopanel true

   2. Click the device you sent the command. 
      Example: Click virtual fire alarm. 

   3. Click Operation logs, to view the status of the command you sent.

      Info

      The operation status can be any of the following values: IN-PROGRESS - The operation is processing on the IoTS server side and has not yet been delivered to the device. PENDING - The operation is delivered to the device but the response from the device is pending. COMPLETED - The operation is delivered to the device and the server has received a response back from the device. ERROR - An error has occurred while carrying out the operation.