Alibaba cloud IOT platform data forwarding to function calculation example

1. Create product

2. Definition model

3. Add device

4. Using the SDK uplink message, refer to the link: Connect alicloud IoT based on open source JAVA MQTT Client

import com.alibaba.taro.AliyunIoTSignUtil; import com.google.common.util.concurrent.ThreadFactoryBuilder; import org.eclipse.paho.client.mqttv3.*; import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence; import java.util.HashMap; import java.util.Map; import java.util.concurrent.ScheduledExecutorService; import java.util.concurrent.ScheduledThreadPoolExecutor; import java.util.concurrent.TimeUnit; public class IoTDemoPubSubDemo { // Device triple information public static String productKey = "a16MX********"; public static String deviceName = "device1"; public static String deviceSecret = "YGLHxUr40E1JaWhk3IVAm0uk********"; public static String regionId = "cn-shanghai"; // Object model - attribute reporting topic private static String pubTopic = "/sys/" + productKey + "/" + deviceName + "/thing/event/property/post"; // User defined topic, defined in the product topic list location private static String subTopic = "/sys/" + productKey + "/" + deviceName + "/thing/event/property/post_reply"; private static MqttClient mqttClient; public static void main(String [] args){ initAliyunIoTClient(); ScheduledExecutorService scheduledThreadPool = new ScheduledThreadPoolExecutor(1, new ThreadFactoryBuilder().setNameFormat("thread-runner-%d").build()); scheduledThreadPool.scheduleAtFixedRate(()->postDeviceProperties(), 10,5, TimeUnit.SECONDS); try { mqttClient.subscribe(subTopic); // Subscribe to Topic } catch (MqttException e) { System.out.println("error:" + e.getMessage()); e.printStackTrace(); } // Set subscription listening 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())); //Printout message payLoad } @Override public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) { } }); } /** * Initialize Client object */ private static void initAliyunIoTClient() { try { // Parameters required to construct a connection 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(false); // connOpts.setCleanSession(true); connOpts.setCleanSession(false); connOpts.setUserName(mqttUsername); connOpts.setPassword(mqttPassword.toCharArray()); connOpts.setKeepAliveInterval(60); mqttClient.connect(connOpts); } /** * Reporting attributes */ private static void postDeviceProperties() { try { //Reporting data //Advanced version model - attribute reporting payload System.out.println("Escalation attribute value"); String payloadJson = "{\"params\":{\"CurrentTemperature\":13,\"Humidity\":10}}"; MqttMessage message = new MqttMessage(payloadJson.getBytes("utf-8")); message.setQos(1); mqttClient.publish(pubTopic, message); } catch (Exception e) { System.out.println(e.getMessage()); } } }

5. Operation status view

1. Create app

2. Apply add function below

3. Edit script

const https = require('https'); const accessToken = 'fill in accessToken，Nail robot webhook Of accessToken'; module.exports.handler = function(event, context, callback) { var eventJson = JSON.parse(event.toString()); console.log(event.toString()); //Pin message format const postData = JSON.stringify({ "msgtype": "markdown", "markdown": { "title": "Equipment temperature and humidity sensor", "text": "#### Temperature and humidity sensor report \ n "+ "> Equipment name:" + eventJson.deviceName+ "\n\n" + "> Real time temperature:" + eventJson.Temperature + "℃\n\n" + "> Relative humidity:" + eventJson.Humidity + "%\n\n" + "> ###### "+ eventJson.time +" publish by [Internet of things platform] (https://www.aliyun.com/product/iot) \n“ }, "at": { "isAtAll": false } }); const options = { hostname: 'oapi.dingtalk.com', port: 443, path: '/robot/send?access_token=' + accessToken, method: 'POST', headers: { 'Content-Type': 'application/json', 'Content-Length': Buffer.byteLength(postData) } }; const req = https.request(options, (res) => { res.setEncoding('utf8'); res.on('data', (chunk) => {}); res.on('end', () => { callback(null, 'success'); }); }); // Abnormal return req.on('error', (e) => { callback(e); }); // Write data req.write(postData); req.end(); };

To obtain the reference link of the accessToken of webhook, a nail robot: Alibaba cloud IoT Studio service development timed light off function example Demo : 2.3 acquisition part of the nail robot Webhook.

4. Quick test

1. Create rule engine

2. Configure processing data

SQL field

deviceName() as deviceName, items.Humidity.value as Humidity, items.CurrentTemperature.value as Temperature, timestamp('yyyy-MM-dd HH:mm:ss') as time

3. Configure forwarding data

4. Start the SDK on the device side, periodically send uplink messages, and view the notifications by pinning groups

5. Uplink log view

Report data from hygrometer to nail group robot

7 February 2020, 10:02 | Views: 9410