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 + ".aliyuncs.com:1883";
params.mqttClientConfig = config;
params.connectConfig = new IoTApiClientConfig();
params.deviceInfo = deviceInfo;
/**建立连接**/
LinkKit.getInstance().init(params, new ILinkKitConnectListener() {
@Override
public void onError(AError aError) {
System.out.println("初始化失败 " + aError.getMsg());
}
@Override
public void onInitDone(InitResult initResult) {
System.out.println("初始化成功 " + initResult.tsl);
String pd = deviceInfo.productKey + "/" + deviceInfo.deviceName;
// 1、cota 请求 Topic
String requestcotaTopic = "/sys/"+pd+"/thing/config/push";
// 订阅Topic
MqttSubscribeRequest upgradeTopicRequest = new MqttSubscribeRequest();
upgradeTopicRequest.topic = requestcotaTopic;
upgradeTopicRequest.isSubscribe = true;
// 直接做Topic的订阅
LinkKit.getInstance().subscribe(upgradeTopicRequest, new IConnectSubscribeListener(){
@Override
public void onSuccess() {
System.out.println("cota订阅成功");
}
@Override
public 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() {
@Override
public void onNotify(String s, String s1, AMessage aMessage) {
System.out.println("cota 监听响应:");
System.out.println(new String((byte[])aMessage.getData()));
}
@Override
public boolean shouldHandle(String s, String s1) {
return false;
}
@Override
public 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-shanghai.aliyuncs.com/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 + ".aliyuncs.com:1883";
params.mqttClientConfig = config;
params.connectConfig = new IoTApiClientConfig();
params.deviceInfo = deviceInfo;
/**建立连接**/
LinkKit.getInstance().init(params, new ILinkKitConnectListener() {
@Override
public void onError(AError aError) {
System.out.println("初始化失败 " + aError.getMsg());
}
@Override
public 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_reply
String requestcotaTopic = "/sys/"+pd+"/thing/config/get_reply";
MqttSubscribeRequest upgradeTopicRequest = new MqttSubscribeRequest();
upgradeTopicRequest.topic = requestcotaTopic;
upgradeTopicRequest.isSubscribe = true;
LinkKit.getInstance().subscribe(upgradeTopicRequest, new IConnectSubscribeListener(){
@Override
public void onSuccess() {
System.out.println("ota订阅成功");
}
@Override
public 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() {
@Override
public void onNotify(String s, String s1, AMessage aMessage) {
System.out.println("cota 监听响应:");
System.out.println(new String((byte[])aMessage.getData()));
}
@Override
public boolean shouldHandle(String s, String s1) {
return false;
}
@Override
public 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Topic
MqttPublishRequest 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() {
@Override
public void onResponse(ARequest aRequest, AResponse aResponse) {
System.out.println("请求发送成功 " + aResponse.getData());
}
@Override
public 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-shanghai.aliyuncs.com/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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