不少場景下,開發者須要更新設備的配置信息,包括設備的系統參數、網絡參數、本地策略等。一般狀況下,是經過固件升級的方式更新設備的配置信息。可是,這將加大固件版本的維護工做,而且須要設備中斷運行以完成更新。爲了解決上述問題,物聯網平臺提供了遠程配置更新的功能,設備無需重啓或中斷運行便可在線完成配置信息的更新。本文主要演示如何使用JAVA SDK實現兩種應用場景。html
一、物聯網平臺提供的遠程配置功能,支持:api
二、流程圖網絡
三、遠程配置大體分爲三部分:ide
遠程配置使用分爲兩種場景,一種是雲端推送配置信息給設備端,一種是設備端主動請求配置信息。根據場景的不一樣,遠程配置的步驟也有所區別。url
一、設備端業務代碼實現spa
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; /**創建鏈接**/ LinkKit.getInstance().init(params, new ILinkKitConnectListener() { @Override public void onError(AError aError) { System.out.println("初始化失敗 " + aError.getMsg()); } @Override public void onInitDone(InitResult initResult) { System.out.println("初始化成功 " + initResult.tsl); String pd = deviceInfo.productKey + "/" + deviceInfo.deviceName; // 一、cota 請求 Topic String requestcotaTopic = "/sys/"+pd+"/thing/config/push"; // 訂閱Topic MqttSubscribeRequest upgradeTopicRequest = new MqttSubscribeRequest(); upgradeTopicRequest.topic = requestcotaTopic; upgradeTopicRequest.isSubscribe = true; // 直接作Topic的訂閱 LinkKit.getInstance().subscribe(upgradeTopicRequest, new IConnectSubscribeListener(){ @Override public void onSuccess() { System.out.println("cota訂閱成功"); } @Override public void onFailure(AError aError) { System.out.println("直接訂閱失敗" + aError.getMsg()); } }); // 註冊ota下行監聽 LinkKit.getInstance().registerOnNotifyListener(new IConnectNotifyListener() { @Override public void onNotify(String s, String s1, AMessage aMessage) { System.out.println("cota 監聽響應:"); 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("鏈接狀態發生變化 :" + s + connectState); } }); } }); } }
二、管理門戶配置遠程控制,詳細步驟參考連接。3d
三、啓動設備端程序,管理門戶批量更新,設備端獲取信息(批量更新頻率限制:一小時內僅容許操做一次):code
{"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"}
一、設備端業務代碼實現htm
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; /**創建鏈接**/ LinkKit.getInstance().init(params, new ILinkKitConnectListener() { @Override public void onError(AError aError) { System.out.println("初始化失敗 " + aError.getMsg()); } @Override public void onInitDone(InitResult initResult) { System.out.println("初始化成功 " + initResult.tsl); String pd = deviceInfo.productKey + "/" + deviceInfo.deviceName; // 一、設備端訂閱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訂閱成功"); } @Override public void onFailure(AError aError) { System.out.println("直接訂閱失敗" + aError.getMsg()); } }); // 註冊下行監聽 LinkKit.getInstance().registerOnNotifyListener(new IConnectNotifyListener() { @Override public void onNotify(String s, String s1, AMessage aMessage) { System.out.println("cota 監聽響應:"); 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("鏈接狀態發生變化 :" + s + connectState); } }); // 四、設備經過Topic /sys/${productKey}/${deviceName}/thing/config/get主動查詢最新的配置信息 String requestTopic = "/sys/"+pd+"/thing/config/get"; System.out.println("發送消息" + requestTopic); // 訂閱Topic MqttPublishRequest request = new MqttPublishRequest(); request.topic = requestTopic; request.payloadObj = "{\"id\":\"123\",\"method\":\"thing.config.get\",\"params\":{\"getType\":\"file\",\"configScope\":\"product\"},\"version\":\"1.0\"}"; // 直接作Topic的發送 LinkKit.getInstance().publish(request, new IConnectSendListener() { @Override public void onResponse(ARequest aRequest, AResponse aResponse) { System.out.println("請求發送成功 " + aResponse.getData()); } @Override public void onFailure(ARequest aRequest, AError aError) { System.out.println("請求發送成功 " + aError.getMsg()); } }); } }); } }
二、運行結果(/sys/${productKey}/${deviceName}/thing/config/get_reply 訂閱獲取的內容)blog
{"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"}
原文連接 本文爲雲棲社區原創內容,未經容許不得轉載。