How to use it with express and socketio

[augustine-lin]

How to use it with express and socketio ?

package.json

{
  "name": "mqtt-device-simulator",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "dependencies": {
    "mqtt-scripts": "^1.2.2",
    "express": "^4.17.1",
    "socket.io": "^2.3.0"
  },
  "devDependencies": {},
  "scripts": {
    "start": "node index.js && mqtt-scripts -u 'mqtt://10.99.253.133' -v 'debug' -d ./",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "Austin",
  "license": "ISC"
}

index.js

var mqtt = require('mqtt-scripts')

var io = require("socket.io");
var express = require("express");
var app = express();
app.use(express.static('www'));
var server = app.listen(3333);
var webSockerIO = io.listen(server);

const deviceName = "Kiosk-1";

let orderId = 0
let orderDetail = "nothing"

webSockerIO.on('connection', function (socket) {

    mqtt.subscribe("device/kiosk/2", (topic, val) => {
        console.log(topic)
        console.log(val)
        var data = val;
        
        if (data.method === "set") {
            switch (data.cmd) {
                case "orderId":
                    orderId = data.orderId;
                    socket.emit('mqtt', { 'msg': {'orderId': orderId} });
                    break;
                case "orderDetail":
                    orderDetail = data.orderDetail;
                    break;
            }
        } else {
            switch (data.cmd) {
                case "ping":
                    socket.emit('mqtt', { 'msg': 'pong' });
                    data.ping = "pong";
                    break;
                case "orderId":
                    data.orderId = orderId;
                    break;
                case "order":
                    data.order = deviceName;
                    break;
            }
        }
        mqtt.publish("ResponseTopic", JSON.stringify(data));
    });

});

error

> mqtt-device-simulator@1.0.0 start /Users/austin/Documents/company/edgeX/mqtt-device-simulator-kiosk
> node index.js && mqtt-scripts -u 'mqtt://10.99.253.133' -v 'debug' -d ./

2020-08-31 18:21:29.243 <info>  mqtt-scripts 1.2.2 starting
2020-08-31 18:21:29.581 <info>  mqtt connected mqtt://127.0.0.1
/Users/austin/Documents/company/edgeX/mqtt-device-simulator-kiosk/index.js:17
    mqtt.subscribe("device/kiosk/2", (topic, val) => {
         ^

TypeError: mqtt.subscribe is not a function
    at Namespace.<anonymous> (/Users/austin/Documents/company/edgeX/mqtt-device-simulator-kiosk/index.js:17:10)
    at Namespace.emit (events.js:315:20)
    at Namespace.EventEmitter.emit (domain.js:482:12)
    at Namespace.emit (/Users/austin/Documents/company/edgeX/mqtt-device-simulator-kiosk/node_modules/socket.io/lib/namespace.js:213:10)
    at /Users/austin/Documents/company/edgeX/mqtt-device-simulator-kiosk/node_modules/socket.io/lib/namespace.js:181:14
    at processTicksAndRejections (internal/process/task_queues.js:79:11)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! mqtt-device-simulator@1.0.0 start: `node index.js && mqtt-scripts -u 'mqtt://10.99.253.133' -v 'debug' -d ./`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the mqtt-device-simulator@1.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/austin/.npm/_logs/2020-08-31T10_21_32_982Z-debug.log