阿裡雲IoT Studio服務開發定時關燈功能示例Demo

概述

IoT Studio服務開發是一個物聯網業務邏輯的開發工具，通過編排服務節點的方式快速完成簡單的物聯網業務邏輯的設計。本文主要使用：定時觸發、裝置和釘釘機器人節點實作對燈泡的定時控制，并将控制後的結果發送給釘釘機器人。本文以官方文檔： 定時關燈 為基礎，針對文檔中缺少裝置屬性上報，釘釘機器人配置參考較老等問題，逐一介紹整個鍊路的完整實作。

Step By Step

1、建立産品和裝置，使用Code完成屬性上報

• 1.1 建立産品和裝置

• 1.2 使用開源Java MQTT SDK上報屬性，參考連結： 基于開源JAVA MQTT Client連接配接阿裡雲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-屬性上報topic
    private static String pubTopic = "/sys/" + productKey + "/" + deviceName + "/thing/event/property/post";
    // 物模型-屬性訂閱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);  //取消訂閱
            mqttClient.subscribe(subTopic); // 訂閱Topic
        } catch (MqttException e) {
            System.out.println("error:" + e.getMessage());
            e.printStackTrace();
        }

        // 設定訂閱監聽
        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())); //列印輸出消息payLoad
                // 訂閱到消息後即刻彙報
                System.out.println("收到雲端下發指令後向平台上行消息");
                mqttClient.publish(pubTopic, new MqttMessage((new String(mqttMessage.getPayload())).getBytes("utf-8")));
            }

            @Override
            public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {

            }
        });

    }

    /**
     * 初始化 Client 對象
     */
    private static void initAliyunIoTClient() {

        try {
            // 構造連接配接需要的參數
            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);
    }

    /**
     * 彙報屬性
     */
    private static void postDeviceProperties() {

        try {
            //上報資料
            //進階版 物模型-屬性上報payload
            System.out.println("上報屬性值");
            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 裝置狀态檢視

2、IoT Studio中進行産品和裝置綁定，完整服務開發子產品搭建

• 2.1 綁定産品和裝置

2.2 建立服務開發

2.3 釘釘機器人Webhook擷取

• 2.4 部署啟動定時任務

3 測試效果

• 3.1 釘釘群消息

• 3.2 程式運作日志

Sub message
Topic : /sys/a1Agp******/LightDevice1/thing/service/property/set
{"method":"thing.service.property.set","id":"50505571","params":{"LightSwitch":0},"version":"1.0.0"}
收到雲端下發指令後向平台上行消息           

參考連結

什麼是IoT Studio