阿里云IoT Studio服务开发定时关灯功能示例Demo
概述 IoT Studio服务开发是一个物联网业务逻辑的开发工具，通过编排服务节点的方式快速完成简单的物联网业务逻辑的设计。本文主要使用：定时触发、设备和钉钉机器人节点实现对灯泡的定时控制，并将控制后的结果发送给钉钉机器人。本文以官方文档：定时关灯为基础，针对文档中缺少设备属性上报，钉钉机器人配置参考较老等问题，逐一介绍整个链路的完整实现。 Step By Step 1、创建产品和设备，使用Code完成属性上报 1.1 创建产品和设备 1.2 使用开源Java MQTT SDK上报属性，参考链接：基于开源JAVA MQTT Client连接阿里云IoT import com.alibaba.taro.AliyunIoTSignUtil; import org.eclipse.paho.client.mqttv3.*; import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence; import java.util.HashMap; import java.util.Map; public class IoTDemoPubSubDemo { public static String productKey = "a1Agp******"; public static String deviceName = "LightDevice1"; public static String deviceSecret = "RLHDiBljxC7YQE7opM**************"; public static String regionId = "cn-shanghai"; // 物模型-属性上报topic private static String pubTopic = "/sys/" + productKey + "/" + deviceName + "/thing/event/property/post"; // 物模型-属性订阅topic private static String subTopic = "/sys/" + productKey + "/" + deviceName + "/thing/service/property/set"; private static MqttClient mqttClient; public static void main(String [] args){ initAliyunIoTClient(); postDeviceProperties(); try { mqttClient.unsubscribe(pubTopic); //取消订阅 mqttClient.subscribe(subTopic); // 订阅Topic } catch (MqttException e) { System.out.println("error:" + e.getMessage()); e.printStackTrace(); } // 设置订阅监听 mqttClient.setCallback(new MqttCallback() { @Override public void connectionLost(Throwable throwable) { System.out.println("connection Lost"); } @Override public void messageArrived(String s, MqttMessage mqttMessage) throws Exception { System.out.println("Sub message"); System.out.println("Topic : " + s); System.out.println(new String(mqttMessage.getPayload())); //打印输出消息payLoad // 订阅到消息后即刻汇报 System.out.println("收到云端下发指令后向平台上行消息"); mqttClient.publish(pubTopic, new MqttMessage((new String(mqttMessage.getPayload())).getBytes("utf-8"))); } @Override public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) { } }); } /** * 初始化 Client 对象 */ private static void initAliyunIoTClient() { try { // 构造连接需要的参数 String clientId = "java" + System.currentTimeMillis(); Map<String, String> params = new HashMap<>(16); params.put("productKey", productKey); params.put("deviceName", deviceName); params.put("clientId", clientId); String timestamp = String.valueOf(System.currentTimeMillis()); params.put("timestamp", timestamp); // cn-shanghai String targetServer = "tcp://" + productKey + ".iot-as-mqtt."+regionId+".aliyuncs.com:1883"; String mqttclientId = clientId + "|securemode=3,signmethod=hmacsha1,timestamp=" + timestamp + "|"; String mqttUsername = deviceName + "&" + productKey; String mqttPassword = AliyunIoTSignUtil.sign(params, deviceSecret, "hmacsha1"); connectMqtt(targetServer, mqttclientId, mqttUsername, mqttPassword); } catch (Exception e) { System.out.println("initAliyunIoTClient error " + e.getMessage()); } } public static void connectMqtt(String url, String clientId, String mqttUsername, String mqttPassword) throws Exception { MemoryPersistence persistence = new MemoryPersistence(); mqttClient = new MqttClient(url, clientId, persistence); MqttConnectOptions connOpts = new MqttConnectOptions(); // MQTT 3.1.1 connOpts.setMqttVersion(4); connOpts.setAutomaticReconnect(true); // connOpts.setCleanSession(true); connOpts.setCleanSession(false); connOpts.setUserName(mqttUsername); connOpts.setPassword(mqttPassword.toCharArray()); connOpts.setKeepAliveInterval(60); mqttClient.connect(connOpts); } /** * 汇报属性 */ private static void postDeviceProperties() { try { //上报数据 //高级版 物模型-属性上报payload System.out.println("上报属性值"); String payloadJson = "{\"params\":{\"LightSwitch\":1}}"; MqttMessage message = new MqttMessage(payloadJson.getBytes("utf-8")); message.setQos(0); mqttClient.publish(pubTopic, message); } catch (Exception e) { System.out.println(e.getMessage()); } } } 1.3 设备状态查看 2、IoT Studio中进行产品和设备绑定，完整服务开发模块搭建 2.1 绑定产品和设备 2.2 创建服务开发 2.3 钉钉机器人Webhook获取 2.4 部署启动定时任务 3 测试效果 3.1 钉钉群消息 3.2 程序运行日志 Sub message Topic : /sys/a1Agp******/LightDevice1/thing/service/property/set {"method":"thing.service.property.set","id":"50505571","params":{"LightSwitch":0},"version":"1.0.0"} 收到云端下发指令后向平台上行消息 参考链接 什么是IoT Studio定时关灯
