Node.js 如何收听AWS物联网阴影更新

我有一个东西和一个应用程序连接在一起使用AWS物联网，两者都使用。这个东西有一个可以设置的温度（

set_temp

）和一个温度传感器（

actual_temp

）

THING侦听

$aws/things/THING\u ID/shadow/updates/delta/

MQTT主题。应用程序在

$aws/things/things\u ID/shadow/updates/

主题上发布以下消息：

{
    "state": {
        "desired": {
            "set_temp": 38.7
        }
    }
}

此MQTT消息传播到对象阴影，然后传播到对象本身。但是，当THING在

$aws/things/THING\u ID/shadow/updates/

主题上报告以下内容时：

{
    "state": {
        "reported": {
            "set_temp": 38.7,
            "actual_temp": 32.4
        }
    }
}

。。。Thing Shadow接收到消息，但不会将消息传播到应用程序。这对于

set_temp

来说很好，因为它实际上不需要传播回应用程序。但是当

实际温度改变时，它应该传播回应用程序，但它永远不会

根据法律，这应该是有效的。他们甚至说要在邮件中包含“
所需：null
”

你怎么能“听”影子的东西而不轮询它呢？要么我做错了什么，要么AWS的物联网平台存在漏洞

更新（包括实际代码）：

App.js:

var awsIot = require('aws-iot-device-sdk');
var name = 'THING_ID';

var app = awsIot.device({
    keyPath: '../../certs/private.pem.key',
    certPath: '../../certs/certificate.pem.crt',
    caPath: '../../certs/root-ca.pem.crt',
    clientId: name,
    region: 'ap-northeast-1'
});

app.subscribe('$aws/things/' + name + '/shadow/update/accepted');

app.on('message', function(topic, payload) {
    // THIS LINE OF CODE NEVER RUNS
    console.log('got message', topic, payload.toString());
});

var awsIot = require('aws-iot-device-sdk');
var name = 'THING_ID';

var device = awsIot.device({
    keyPath: '../../certs/private.pem.key',
    certPath: '../../certs/certificate.pem.crt',
    caPath: '../../certs/root-ca.pem.crt',
    clientId: name,
    region: 'ap-northeast-1'
});

device.subscribe('$aws/things/' + name + '/shadow/update/delta');

device.on('message', function (topic, payload) {
    console.log('got message', topic, payload.toString());
});

// Publish state.reported every 1 second with changing temp
setInterval(function () {
    device.publish('$aws/things/' + name + '/shadow/update', JSON.stringify({
        'state': {
            'reported': {
                'actual_pool_temp': 20 + Math.random() * 10
            }
        }
    }));
}, 1000);

Device.js:

var awsIot = require('aws-iot-device-sdk');
var name = 'THING_ID';

var app = awsIot.device({
    keyPath: '../../certs/private.pem.key',
    certPath: '../../certs/certificate.pem.crt',
    caPath: '../../certs/root-ca.pem.crt',
    clientId: name,
    region: 'ap-northeast-1'
});

app.subscribe('$aws/things/' + name + '/shadow/update/accepted');

app.on('message', function(topic, payload) {
    // THIS LINE OF CODE NEVER RUNS
    console.log('got message', topic, payload.toString());
});

var awsIot = require('aws-iot-device-sdk');
var name = 'THING_ID';

var device = awsIot.device({
    keyPath: '../../certs/private.pem.key',
    certPath: '../../certs/certificate.pem.crt',
    caPath: '../../certs/root-ca.pem.crt',
    clientId: name,
    region: 'ap-northeast-1'
});

device.subscribe('$aws/things/' + name + '/shadow/update/delta');

device.on('message', function (topic, payload) {
    console.log('got message', topic, payload.toString());
});

// Publish state.reported every 1 second with changing temp
setInterval(function () {
    device.publish('$aws/things/' + name + '/shadow/update', JSON.stringify({
        'state': {
            'reported': {
                'actual_pool_temp': 20 + Math.random() * 10
            }
        }
    }));
}, 1000);

似乎是因为我对应用程序和其他东西使用了相同的
clientId
。它们不应该有相同的
clientId
。下面是我使用的代码，其中包含
clientId

var app = awsIot.device({
    keyPath: '../../certs/private.pem.key',
    certPath: '../../certs/certificate.pem.crt',
    caPath: '../../certs/root-ca.pem.crt',
    clientId: 'MY_ID',            // This needs to be different for all parties
    region: 'ap-southeast-2'
});

由于AWS的支持，这一问题得到了解答