如何解决aws-iot-device-sdk Thing Shadow 断开设备
我使用“aws-iot-device-sdk”为 AWS IoT 编写了代码。我能够创建一个设备并发布。设备不会在两者之间断开连接。 (独立) 我还可以创建影子设备并正确发布、订阅(独立)。
但是,当我连接 2 时,设备不断断开连接并重新连接。
下面是我写的代码。请建议我做错了什么
index.js
const fs = require('fs');
const Constants = require('./constants');
const Transmission = require('./transmission');
const ThingShadow = require('./thingShadow');
execute = () => {
ThingShadow.shadowing();
Transmission.transmit();
}
execute();
thingShadow.js
const awsIot = require('aws-iot-device-sdk');
const Constants = require('./constants');
const utils = require('./utils');
var thingShadows;
shadowing = () => {
thingShadows = awsIot.thingShadow({
keyPath: Constants.ACTUAL_KEY_PATH,certPath: Constants.ACTUAL_CERT_PATH,caPath: Constants.CA_PATH,clientId: Constants.THING_NAME,host: Constants.HOST
});
thingShadows.on('connect',function () {
thingShadows.register(Constants.THING_NAME);
});
thingShadows.on('status',function (thingName,stat,clientToken,stateObject) {
console.log('received ' + stat + ' on ' + thingName + ': ' +
JSON.stringify(stateObject));
});
thingShadows.on('delta',stateObject) {
console.log(`Delta received `);
});
thingShadows.on('timeout',clientToken) {
console.log('received timeout ' + ' on ' + operation + ': ' +
clientToken);
});
}
module.exports = {
shadowing
}
// shadowing();
transmission.js
const awsIot = require('aws-iot-device-sdk');
const Constants = require('./constants');
const utils = require('./utils');
let data = {
"records":{
"key1":"value1","key2":"value2","key3":"value3"
}
};
let device;
transmit = () => {
// create device
device = awsIot.device({
keyPath: Constants.ACTUAL_KEY_PATH,host: Constants.HOST
});
device.on('connect',function () {
console.log('Connected to AWS');
callPublisher();
});
device.on('error',function(err) {
console.log(error);
});
device.on('message',function (topic,payload) {
console.log(`Topic : ${topic}`);
console.log(`Payload : ${payload}`);
if (topic === `MyTopic`) {
device.publish(`MyTopic`,JSON.stringify(data));
} else {
console.log('Something else');
}
});
device
.on('close',function() {
console.log('close');
});
device
.on('reconnect',function() {
console.log('reconnect');
});
device
.on('offline',function() {
console.log('offline');
});
device
.on('error',function(error) {
console.log('error',error);
});
}
callPublisher = () => {
data.records.key1 = 10;
data.records.key2 = 20;
device.publish(`MyTopic`,JSON.stringify(data));
console.log(`Data sent : ${JSON.stringify(data)}`);
}
module.exports = {
transmit
}
// transmit();
下面是程序的输出
Connected to AWS
offline
close
reconnect
Data sent : {"records":{"key1":"10","key2":"20","key3":"value3"}}
如果有人有将 mqtt.js 与 nodejs 连接的链接/代码,请分享。
解决方法
谢谢@MehmetaliSaraç。问题是由于创建对象和阴影具有相同的客户端 ID。这导致重复客户端 ID 问题导致其中一个对象断开连接。我制作了一个对象和阴影都使用的单例对象。问题已解决。
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