MQTT通过angularJS中的tcp连接

Question

我无法连接到TCP地址，并且该代码仅连接到websocket。如何将我的代码转换为连接tcp地址？

    var app = angular.module('myApp', []);
app.controller('testMQTT', function ($scope) {
    var client = new Paho.MQTT.Client("10.218.68.81", Number(1883), "/Sensors/PIM-1/SensorData", "pim1");
    client.onConnectionLost = function (responseObject) {
        console.log("Connection Lost: " + responseObject.errorMessage);
    }
    client.onMessageArrived = function (message) {
        console.log("Message Arrived: " + message.payloadString);
        $scope.$apply();
        var jsonObject = JSON.parse(message.payloadString);
        console.log(jsonObject);
    }
    function onConnect() {
        $scope.Message = "Connected !";
        console.log("connected");
        var subscribeOptions = {
            qos: 2, // QoS
            invocationContext: {
                foo: true
            }, // Passed to success / failure callback
            onSuccess: onSuccessCallback,
            onFailure: onFailureCallback,
            timeout: 10
        };
        client.subscribe("/Sensors/PIM-1/SensorData", subscribeOptions);
        $scope.$apply();
    }
    function onSuccessCallback() {}
    function onFailureCallback() {}
    $scope.Messages = "Connecting !";
    // Connect the client, providing an onConnect callback
    client.connect({
        onSuccess: onConnect
    });
})