阿里云物联网平台远程配置功能JAVA 示例参考

概述

很多场景下，开发者需要更新设备的配置信息，包括设备的系统参数、网络参数、本地策略等。通常情况下，是通过固件升级的方式更新设备的配置信息。但是，这将加大固件版本的维护工作，并且需要设备中断运行以完成更新。为了解决上述问题，物联网平台提供了远程配置更新的功能，设备无需重启或中断运行即可在线完成配置信息的更新。本文主要演示如何使用JAVA SDK实现两种应用场景。

原理说明

1、物联网平台提供的远程配置功能，支持：

开启/关闭远程配置。在线编辑配置文件，并管理版本。批量更新设备配置信息。设备主动请求更新配置信息。

2、流程图

3、远程配置大致分为三部分：

生成配置文件：您在物联网平台控制台编辑并保存配置信息。推送配置文件：您在物联网平台控制台批量推送配置信息给设备。设备接收后，修改本地配置文件。设备主动请求配置信息：设备主动向云端请求新的配置文件，并进行更新。

远程配置使用分为两种场景，一种是云端推送配置信息给设备端，一种是设备端主动请求配置信息。根据场景的不同，远程配置的步骤也有所区别。

场景一：云端推送配置信息给设备端

1、设备端业务代码实现

import com.aliyun.alink.dm.api.DeviceInfo;import com.aliyun.alink.dm.api.InitResult;import com.aliyun.alink.dm.api.IoTApiClientConfig;import com.aliyun.alink.linkkit.api.ILinkKitConnectListener;import com.aliyun.alink.linkkit.api.IoTMqttClientConfig;import com.aliyun.alink.linkkit.api.LinkKit;import com.aliyun.alink.linkkit.api.LinkKitInitParams;import com.aliyun.alink.linksdk.cmp.connect.channel.MqttSubscribeRequest;import com.aliyun.alink.linksdk.cmp.core.base.AMessage;import com.aliyun.alink.linksdk.cmp.core.base.ConnectState;import com.aliyun.alink.linksdk.cmp.core.listener.IConnectNotifyListener;import com.aliyun.alink.linksdk.cmp.core.listener.IConnectSubscribeListener;import com.aliyun.alink.linksdk.tools.AError;public class DeviceCOTADemo1 {public static void main(String[] args) {String regionId = "cn-shanghai";DeviceInfo deviceInfo = new DeviceInfo();deviceInfo.productKey = "******";deviceInfo.deviceName = "******";deviceInfo.deviceSecret = "********";LinkKitInitParams params = new LinkKitInitParams();IoTMqttClientConfig config = new IoTMqttClientConfig();config.productKey = deviceInfo.productKey;config.deviceName = deviceInfo.deviceName;config.deviceSecret = deviceInfo.deviceSecret;config.channelHost = deviceInfo.productKey + ".iot-as-mqtt." + regionId + ".:1883";params.mqttClientConfig = config;params.connectConfig = new IoTApiClientConfig();params.deviceInfo = deviceInfo;/**建立连接**/LinkKit.getInstance().init(params, new ILinkKitConnectListener() {@Overridepublic void onError(AError aError) {System.out.println("初始化失败 " + aError.getMsg());}@Overridepublic void onInitDone(InitResult initResult) {System.out.println("初始化成功 " + initResult.tsl);String pd = deviceInfo.productKey + "/" + deviceInfo.deviceName;// 1、cota 请求 TopicString requestcotaTopic = "/sys/"+pd+"/thing/config/push";// 订阅TopicMqttSubscribeRequest upgradeTopicRequest = new MqttSubscribeRequest();upgradeTopicRequest.topic = requestcotaTopic;upgradeTopicRequest.isSubscribe = true;// 直接做Topic的订阅LinkKit.getInstance().subscribe(upgradeTopicRequest, new IConnectSubscribeListener(){@Overridepublic void onSuccess() {System.out.println("cota订阅成功");}@Overridepublic void onFailure(AError aError) {System.out.println("直接订阅失败" + aError.getMsg());}});// 注册ota下行监听LinkKit.getInstance().registerOnNotifyListener(new IConnectNotifyListener() {@Overridepublic void onNotify(String s, String s1, AMessage aMessage) {System.out.println("cota 监听响应:");System.out.println(new String((byte[])aMessage.getData()));}@Overridepublic boolean shouldHandle(String s, String s1) {return false;}@Overridepublic void onConnectStateChange(String s, ConnectState connectState) {System.out.println("连接状态发生变化 ：" + s + connectState);}});}});}}

2、管理门户配置远程控制，详细步骤参考链接。

3、启动设备端程序，管理门户批量更新，设备端获取信息(批量更新频率限制：一小时内仅允许操作一次)：

{"method":"thing.config.push","id":"1296799269","params":{"getType":"file","configId":"92eb82a17a7441111f7dcb830e93ed79","sign":"568e9211117eedc9eadbc2907719fe2086348f572ddd3f373d6f297ba5aba4d1","configSize":12,"signMethod":"Sha256","url":"https://otx-devicecenter-thing-config-cn-shanghai-online.oss-cn-/11zisMUtYDk/1567338668042_gz2Qs7hl?Expires=1567340568&OSSAccessKeyId=1111113rx5dg2JBm&Signature=S0LS9H%1111zJqTg%2Fphf19%2BfE%2F2bs%3D"},"version":"1.0"}

场景二：设备主动请求配置信息

1、设备端业务代码实现

import com.aliyun.alink.dm.api.DeviceInfo;import com.aliyun.alink.dm.api.InitResult;import com.aliyun.alink.dm.api.IoTApiClientConfig;import com.aliyun.alink.linkkit.api.ILinkKitConnectListener;import com.aliyun.alink.linkkit.api.IoTMqttClientConfig;import com.aliyun.alink.linkkit.api.LinkKit;import com.aliyun.alink.linkkit.api.LinkKitInitParams;import com.aliyun.alink.linksdk.cmp.connect.channel.MqttPublishRequest;import com.aliyun.alink.linksdk.cmp.connect.channel.MqttSubscribeRequest;import com.aliyun.alink.linksdk.cmp.core.base.AMessage;import com.aliyun.alink.linksdk.cmp.core.base.ARequest;import com.aliyun.alink.linksdk.cmp.core.base.AResponse;import com.aliyun.alink.linksdk.cmp.core.base.ConnectState;import com.aliyun.alink.linksdk.cmp.core.listener.IConnectNotifyListener;import com.aliyun.alink.linksdk.cmp.core.listener.IConnectSendListener;import com.aliyun.alink.linksdk.cmp.core.listener.IConnectSubscribeListener;import com.aliyun.alink.linksdk.tools.AError;public class DeviceCOTADemo2 {public static void main(String[] args) {String regionId = "cn-shanghai";DeviceInfo deviceInfo = new DeviceInfo();deviceInfo.productKey = "******";deviceInfo.deviceName = "******";deviceInfo.deviceSecret = "********";LinkKitInitParams params = new LinkKitInitParams();IoTMqttClientConfig config = new IoTMqttClientConfig();config.productKey = deviceInfo.productKey;config.deviceName = deviceInfo.deviceName;config.deviceSecret = deviceInfo.deviceSecret;config.channelHost = deviceInfo.productKey + ".iot-as-mqtt." + regionId + ".:1883";params.mqttClientConfig = config;params.connectConfig = new IoTApiClientConfig();params.deviceInfo = deviceInfo;/**建立连接**/LinkKit.getInstance().init(params, new ILinkKitConnectListener() {@Overridepublic void onError(AError aError) {System.out.println("初始化失败 " + aError.getMsg());}@Overridepublic void onInitDone(InitResult initResult) {System.out.println("初始化成功 " + initResult.tsl);String pd = deviceInfo.productKey + "/" + deviceInfo.deviceName;// 1、设备端订阅Topic：/sys/${productKey}/${deviceName}/thing/config/get_replyString requestcotaTopic = "/sys/"+pd+"/thing/config/get_reply";MqttSubscribeRequest upgradeTopicRequest = new MqttSubscribeRequest();upgradeTopicRequest.topic = requestcotaTopic;upgradeTopicRequest.isSubscribe = true;LinkKit.getInstance().subscribe(upgradeTopicRequest, new IConnectSubscribeListener(){@Overridepublic void onSuccess() {System.out.println("ota订阅成功");}@Overridepublic void onFailure(AError aError) {System.out.println("直接订阅失败" + aError.getMsg());}});// 注册下行监听LinkKit.getInstance().registerOnNotifyListener(new IConnectNotifyListener() {@Overridepublic void onNotify(String s, String s1, AMessage aMessage) {System.out.println("cota 监听响应:");System.out.println(new String((byte[])aMessage.getData()));}@Overridepublic boolean shouldHandle(String s, String s1) {return false;}@Overridepublic void onConnectStateChange(String s, ConnectState connectState) {System.out.println("连接状态发生变化 ：" + s + connectState);}});// 4、设备通过Topic /sys/${productKey}/${deviceName}/thing/config/get主动查询最新的配置信息String requestTopic = "/sys/"+pd+"/thing/config/get";System.out.println("发送消息" + requestTopic);// 订阅TopicMqttPublishRequest request = new MqttPublishRequest();request.topic = requestTopic;request.payloadObj = "{\"id\":\"123\",\"method\":\"thing.config.get\",\"params\":{\"getType\":\"file\",\"configScope\":\"product\"},\"version\":\"1.0\"}";// 直接做Topic的发送LinkKit.getInstance().publish(request, new IConnectSendListener() {@Overridepublic void onResponse(ARequest aRequest, AResponse aResponse) {System.out.println("请求发送成功 " + aResponse.getData());}@Overridepublic void onFailure(ARequest aRequest, AError aError) {System.out.println("请求发送成功 " + aError.getMsg());}});}});}}

2、运行结果(/sys/${productKey}/${deviceName}/thing/config/get_reply 订阅获取的内容)

{"code":200,"data":{"configId":"a9415f2d6e444d7f9e60a3d46f11d566","configSize":18,"getType":"file","sign":"112f38e7345a2ac46d9f80a401886727f27de96ebf1c82b6825df4b31116ab02","signMethod":"Sha256","url":"https://otx-devicecenter-thing-config-cn-shanghai-online.oss-cn-/11D8NwXCe56/1567337893929_gpUFnE69?Expires=1567339979&OSSAccessKeyId=11AIRY3rx5dg2JBm&Signature=1112qy8bOsa48elOQFt4qHQGaqk%3D"},"id":"123","method":"thing.config.get","version":"1.0"}

原文链接

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