VC MFC C++ MQTT VC编译MQTT VC调用MQTT dll eclipse-paho-mqtt
系统：windows10 64bit
开发工具：UEdit64
运行环境：360安全浏览器 12.1
测试工具：MQTTBox
一、编写简单布局
布局效果：
布局代码：
<body style="margin: 0 auto;">
<div style="width: 500px;">服务器地址：<input style="float: right;width: 300px;" id="MQTT_ServerAdd" value="ws://www.passingworld.vip:8083/mqtt"></div>
<div style="width: 500px;">心跳时间 ：<input style="float: right;width: 300px;" id="MQTT_ConnHeartbeatTime" value="30"></div>
<div style="width: 500px;">用户名 ：<input style="float: right;width: 300px;" id="MQTT_UserName" value="admin"></div>
<div style="width: 500px;">密码 ：<input style="float: right;width: 300px;" id="MQTT_PassWord" value="public"></div>
<div>
<button onclick="MQTT_ConnServer()">连接服务器</button>
</div>
<div style="margin-top: 20px;">
订阅消息<input id="MQTT_Subscribe_Msg">
QoS<select id="MQTT_Subscribe_QoS">
<option>0_Almost_Once</option>
<option>1_Atleast_Once</option>
<option>2_Exactly_Once</option>
</select>
<button onclick="Add_MQTT_Subscribe()">添加订阅信息</button>
</div>
<div style="margin-top: 20px;">
订阅列表
</div>
<div>
<table style="padding: 1px;width: 700px;margin-top: 5px;" border="1">
<tr style="background-color: #919191;">
<td>订阅消息</td>
<td>QoS</td>
<td>操作</td>
</tr>
</table>
</div>
<div style="margin-top: 20px;">
接收消息
</div>
<div>
<textarea id="textareaid" rows="5" cols="30" class="message1" style="width: 100%;height: 300px; min-height: 100px;"></textarea>
</div>
<div>
发布点：<input id="MQTT_Publish_Text">
发布消息：<input id="MQTT_Publish_Msg">
<button onclick="Send_MQTT_Msg()">发送消息</button>
</div>
</body>二、编写JS代码
连接代码
function MQTT_Connect(serveradd,KeepAlive,UserName,PassWord) {
//MQTT连接的配置
MQTT_Options: {
protocolVersion: 4; //MQTT连接协议版本
clientId: 'miniTest22222';
clean: false;
keepalive: KeepAlive;
password: UserName;
username: PassWord;
reconnectPeriod: 1000; //1000毫秒，两次重新连接之间的间隔
connectTimeout: 10 * 1000; //1000毫秒，两次重新连接之间的间隔
resubscribe: true; //如果连接断开并重新连接，则会再次自动订阅已订阅的主题（默认true）
};
//开始连接
MQTT_Client = mqtt.connect(serveradd, this.MQTT_Options);
MQTT_Client.on('connect',
function (connack) {
console.log('MQTT连接成功')
})
//服务器下发消息的回调
MQTT_Client.on("message", function (topic, payload) {
console.log(" 收到 topic:" + topic + " , payload :" + payload)
var str = document.getElementById("textareaid").value;
document.getElementById("textareaid").value = str + "\n"+"收到 topic:" + topic + " , payload :" + payload;
})
//服务器连接异常的回调
MQTT_Client.on("error", function (error) { console.log("MQTT Server Error 的回调" + error) })
//服务器重连连接异常的回调
MQTT_Client.on("reconnect", function () { console.log("MQTT Server Reconnect的回调") })
//服务器连接异常的回调
MQTT_Client.on("offline", function (errr) { console.log("MQTT Server Offline的回调" + errr) })
};订阅一个主题代码
MQTT_SubOne = function(Topic) {
var ok = false;
if (MQTT_Client && MQTT_Client.connected) {
MQTT_Client.subscribe(Topic, function (err, granted) {
if (!err) {
console.log('订阅主题 ' + Topic + ' 成功')
ok = true;
}else { console.log('订阅主题 ' + Topic + ' 失败')
ok = false;
}
})
} else {
console.log('请先连接服务器')
ok = false;
}
return ok;
};订阅多个主题代码
function MQTT_SubMany() {
if (MQTT_Client && MQTT_Client.connected) {
MQTT_Client.subscribe({ 'Topic1': { qos: 0 }, 'Topic2': { qos: 1 } }, function (err, granted) {
if (!err) {
console.log('订阅多主题成功')
} else {
console.log('订阅多主题失败')
}
})
} else {
console.log('请先连接服务器')
}
};发布消息代码
MQTT_PubMsg = function(Topic, Msg) {
if (MQTT_Client && MQTT_Client.connected) {
MQTT_Client.publish(Topic, Msg);
console.log('发布成功->' + Topic + '->' + Msg)
} else {
console.log('请先连接服务器')
}
};取消订阅一个主题代码
function MQTT_UnSubOne(Topic) {
if (MQTT_Client && MQTT_Client.connected) {
MQTT_Client.unsubscribe(Topic);
} else {
console.log('请先连接服务器')
}
};取消订阅多个主题代码
function MQTT_unSubMany() {
if (MQTT_Client && MQTT_Client.connected) {
MQTT_Client.unsubscribe(['Topic1', 'Topic2']);
} else {
console.log('请先连接服务器')
}
};