Javascript 连接nodejs和云mqtt

我正在做一个基于物联网的项目。所以我需要连接

cloudmqtt

和

nodejs

服务器

app.js

// Create a MQTT Client
var mqtt = require('mqtt');

// Create a client connection to CloudMQTT for live data
var client = mqtt.connect('xxxxxxxxxxx', {
  username: 'xxxxx',
  password: 'xxxxxxx' 
});

client.on('connect', function() { // When connected
    console.log("Connected to CloudMQTT");
  // Subscribe to the temperature
  client.subscribe('Motion', function() {
    // When a message arrives, do something with it
    client.on('message', function(topic, message, packet) {
      // ** Need to pass message out **
    });
  });

});

var mqtt = require('mqtt');
var options = {
    port: 15255,
    host: 'mqtt://m11.cloudmqtt.com',
    clientId: 'mqttjs_' + Math.random().toString(16).substr(2, 8),
    username: 'xxxxxxxxxxxxxxxxxx',
    password: 'xxxxxxxxxxxxxxxxxx',
    keepalive: 60,
    reconnectPeriod: 1000,
    protocolId: 'MQIsdp',
    protocolVersion: 3,
    clean: true,
    encoding: 'utf8'
};
var client = mqtt.connect('mqtt://m11.cloudmqtt.com', options);
client.on('connect', function() { // When connected
    console.log('connected');
    // subscribe to a topic
    client.subscribe('topic1/#', function() {
        // when a message arrives, do something with it
        client.on('message', function(topic, message, packet) {
            console.log("Received '" + message + "' on '" + topic + "'");
        });
    });

    // publish a message to a topic
    client.publish('topic1/#', 'my message', function() {
        console.log("Message is published");
        client.end(); // Close the connection when published
    });
});

---

然后启动了我的服务器。但是什么也没有发生（没有错误消息和警告）。请帮我解决这个问题？

可能是连接出错，尝试添加这个，我想您会看到一些东西：

client.on('error', function(err) {
    console.log(err);
});

---

请检查启动/配置MQTT服务器的IP和端口是否打开。可能这两个被防病毒防火墙或服务器防火墙阻止，我没有得到你的访问端口。请在连接云mqtt之前检查这些服务器设置

activemq.xml and jetty.xml

    name="openwire" uri="tcp://0.0.0.0:61616 (default)
    name="amqp" uri="amqp://0.0.0.0:5672 (default)
    name="stomp" uri="stomp://0.0.0.0:61613 (default)
    name="mqtt" uri="mqtt://0.0.0.0:1883 (default) (Android and Ios team)
    name="ws" uri="ws://0.0.0.0:61614 (default) (Php team)

访问url mqtt:

请关注物联网核心 如果您正在使用Node.js构建应用程序，则有Mosca（）

如果您正在使用Python构建应用程序，那么可以查看hbmqtt（）

开发者端代码共享，可能会有帮助：

if (!window.WebSocket) {
    $("#connect").html("\

            <p>\
            Your browser does not support WebSockets. This example will not work properly.<br>\
            Please use a Web Browser with WebSockets support (WebKit or Google Chrome).\
            </p>\
        ");
} else {
    function subscribeClient() {
        var currentDate = new Date();
        var mqtt_clientId = CURRENT_USER_ID + "-" + currentDate.getTime();     
        var mqtt_host = '00.000.00.000';
        var mqtt_port = '00000';
        var mqtt_user = 'xxxxx';
        var mqtt_password = 'xxxxx';
        $("#connect_clientId").val("example-" + (Math.floor(Math.random() * 100000)));
        var timeout = 3000 / 2;
        var keepAliveInterval = 3000;
        var maxMqqtConnectCount = 80;
        client = new Messaging.Client(mqtt_host, Number(mqtt_port), mqtt_clientId);
        client.onConnect = onConnect;
        client.onMessageArrived = onMessageArrived;
        client.onConnectionLost = onConnectionLost;
        // the client is notified when it is connected to the server.
        var onConnect = function (frame) {
            console.log('mqqt connected.');
            $("#chat_conn").val(1);
            $(".offline-alert").css("display", "none");
            // connecting client
            client.subscribe(topicId);
            //subscribing to multiple groups
            var groups = JSON.parse($("#current_user_groups").val());
            $(groups).each(function (index, element) {
                var group_id = element["GroupID"];
                var group_topic_id = getGroupTopicId(group_id);
                client.subscribe(group_topic_id);
            });

        };

        function disconnectClient() {
            client.disconnect();
            $(".offline-alert").css("display", "block");
            $("#chat_conn").val(0);
        }

        function onFailure(failure) {
            console.log('mqqt connectinn failed');
            $("#chat_conn").val(0);
            $(".offline-alert").css("display", "block");
            connectMqtt();
        }

        function onConnectionLost(responseObject) {
            console.log('mqqt connectinn lost');
            $("#chat_conn").val(0);
            $(".offline-alert").css("display", "block");
            connectMqtt();
        }

        function onMessageArrived(message) {
            if (!message) {
                return false;
            }
            console.log(message.payloadString);

            }


        function connectMqtt()
        {
            var currentConnectionCount = getMqqtConnectionLostCount();
            if (currentConnectionCount <= maxMqqtConnectCount)
            {
                setMqqtConnectionLostCount();
                console.log('connecting mqqt ' + getMqqtConnectionLostCount() + ' times.');
                client.connect({
                    timeout: timeout, //seconds
                    keepAliveInterval: keepAliveInterval,
                    userName: mqtt_user,
                    useSSL: false, // for secure connection on https #added by Virendra Yadav ver1.1 on 2015-02-03 to set MQTT SSL use setting
                    password: mqtt_password,
                    onSuccess: onConnect,
                    onFailure: onFailure,
                });
            } else
            {

                console.log('mqqt unable to connect more than ' + maxMqqtConnectCount + ' times.');
                window.location.reload();
            }
        }
        connectMqtt();

        function setMqqtConnectionLostCount()
        {
            var currentConnectionLostCount = getMqqtConnectionLostCount();
            currentConnectionLostCount = parseInt(currentConnectionLostCount);
            currentConnectionLostCount = currentConnectionLostCount + 1;
            $('#mqqtReconnectConnectionCount').val(currentConnectionLostCount);
        }
        function getMqqtConnectionLostCount()
        {
            var countVal = $('#mqqtReconnectConnectionCount').val();
            return countVal;
        }
    }

if（！window.WebSocket）{
$（“#连接”）.html\
\
您的浏览器不支持WebSocket。此示例无法正常工作。
\
请使用支持WebSocket的Web浏览器（WebKit或Google Chrome）\
\
");
}否则{
函数subscribeClient（）{
var currentDate=新日期（）；
var mqtt_clientId=CURRENT_USER_ID+“-”+currentDate.getTime（）；
var mqtt_host='00.000.00.000'；
var mqtt_端口='00000'；
var mqtt_user='xxxxx'；
var mqtt_password='xxxxx'；
$（“#connect_clientId”）.val（“示例-”+（Math.floor（Math.random（）*100000））；
var超时=3000/2；
var keepAliveInterval=3000；
var maxmqtconnectcount=80；
client=new Messaging.client（mqtt_主机，编号（mqtt_端口），mqtt_客户端ID）；
client.onConnect=onConnect；
client.onMessageArrived=onMessageArrived；
client.onConnectionLost=onConnectionLost；
//客户端连接到服务器时会收到通知。
var onConnect=功能（帧）{
log（'mqqt已连接'）；
$（“chat#u conn”）.val（1）；
$（“.offline alert”）.css（“显示”、“无”）；
//连接客户端
客户。订阅（topicId）；
//订阅多个组
var groups=JSON.parse（$（“#当前_用户_组”）.val（）；
$（组）。每个（函数（索引、元素）{
var group_id=元素[“GroupID”]；
var group\u topic\u id=getGroupTopicId（group\u id）；
client.subscribe（组\主题\ id）；
});
};
函数disconnectClient（）{
client.disconnect（）；
$（“.offline alert”）.css（“显示”、“阻止”）；
$（“chat#u conn”）.val（0）；
}
功能失效（失效）{
log（'mqqt connectinn failed'）；
$（“chat#u conn”）.val（0）；
$（“.offline alert”）.css（“显示”、“阻止”）；
connectMqtt（）；
}
函数onConnectionLost（响应对象）{
log（'mqqt connectinn lost'）；
$（“chat#u conn”）.val（0）；
$（“.offline alert”）.css（“显示”、“阻止”）；
connectMqtt（）；
}
函数onMessageArrived（消息）{
如果（！消息）{
返回false；
}
console.log（message.payloadString）；
}
函数connectMqtt（）
{
var currentConnectionCount=getMqqtConnectionLostCount（）；
如果（currentConnectionCount我已经实现了云MQTT和NodeJs接口


    var mqtt = require('mqtt'),url = require('url')
    var client = mqtt.createClient(PORTNO,"m10.cloudmqtt.com",
    {
        username: "xxxxxxxxx",
        password: "xxxxxxxxx"
    });

    client.on('connect',function()
    {
        client.publish("Hello",function()
        {
            client.end();
        })
    })
    
现在，
cloudmqtt
和
nodejs
服务器通过提供诸如clientId、keepalive、protocolVersion等额外参数进行连接

app.js

// Create a MQTT Client
var mqtt = require('mqtt');

// Create a client connection to CloudMQTT for live data
var client = mqtt.connect('xxxxxxxxxxx', {
  username: 'xxxxx',
  password: 'xxxxxxx' 
});

client.on('connect', function() { // When connected
    console.log("Connected to CloudMQTT");
  // Subscribe to the temperature
  client.subscribe('Motion', function() {
    // When a message arrives, do something with it
    client.on('message', function(topic, message, packet) {
      // ** Need to pass message out **
    });
  });

});

var mqtt = require('mqtt');
var options = {
    port: 15255,
    host: 'mqtt://m11.cloudmqtt.com',
    clientId: 'mqttjs_' + Math.random().toString(16).substr(2, 8),
    username: 'xxxxxxxxxxxxxxxxxx',
    password: 'xxxxxxxxxxxxxxxxxx',
    keepalive: 60,
    reconnectPeriod: 1000,
    protocolId: 'MQIsdp',
    protocolVersion: 3,
    clean: true,
    encoding: 'utf8'
};
var client = mqtt.connect('mqtt://m11.cloudmqtt.com', options);
client.on('connect', function() { // When connected
    console.log('connected');
    // subscribe to a topic
    client.subscribe('topic1/#', function() {
        // when a message arrives, do something with it
        client.on('message', function(topic, message, packet) {
            console.log("Received '" + message + "' on '" + topic + "'");
        });
    });

    // publish a message to a topic
    client.publish('topic1/#', 'my message', function() {
        console.log("Message is published");
        client.end(); // Close the connection when published
    });
});

请注意，密码是一个缓冲区，您可以传递选项上的任何属性：

var options = { username: 'strUserName',
                password: new Buffer('strPassword')};

var client = mqtt.connect('mqtt://m11.cloudmqtt.com', options);

感谢您的快速响应。我已经添加了这行代码。但是同样的事情再次发生。您有任何示例吗？感谢您的快速响应。我从哪里得到这个文件？请检查您的conf文件夹..\apache-activemq-5.11.1\conf以及防火墙设置开放端口或IP的入站和出站答案不应该都是代码块，请重新选择把它垫起来，这样它就可读了。这不像，我在提供解决方案！！据我所知，我在尝试帮助这个男孩。不要再这样评论了。现在不行。使用这个解决方案有什么问题吗？我试过了，但总是出错-失败：在WebSocket握手时出错：net:：ERR\u连接_RESET@Muhsin我有一个我在这里通过几个谷歌搜索。也许你可以给我一些指导。我正在从我的javascript客户端连接到mqtt，并从javascript设置用户名/密码作为示例。但是你知道从浏览器检查这些凭据非常简单。你如何防止这种情况？或者可能有一些不同的“安全”解决方案从浏览器连接到mqtt？如果任何人在连接到Cloudmqtt Websockets API时仍遇到此问题，并且出现连接重置错误，请将主机更改为
wss://soldier.cloudmqtt.com:38190/mqtt
相应地更改URL和端口。