SerialPort 'close' event never fire


I'm using nodeJS's SerialPort Package for connecting to computer ports.

About Package's close event <a href="https://github.com/EmergingTechnologyAdvisors/node-serialport#module_serialport--SerialPort+event_close" rel="nofollow">here</a>.

I have created this code, I would like to know why close/disconnect event never fire when I disconnect the COM

const express = require('express'); const router = express.Router(); // const cors = require('cors'); router.use(cors()); // const SerialPort = require('serialport'); const Readline = SerialPort.parsers.Readline; const port = new SerialPort('COM7',function (err) { if (err) { return console.log('Error: ', err.message); } }); const parser = port.pipe(new Readline()); /* var lastresult = ''; var count = 0; */ port.on('open', function() { console.log('~Port is open.'); parser.on('data', console.log); }); port.on('disconnect', function () { console.log('disconnected'); }); port.on('close', function () { console.log('closed'); }); router.get('/', function (req, res) { res.send('index'); }); module.exports = router;

I'm trying to think if I use it wrong because I havn't saw example for using this event.

Thanks for the help :)


I have created timestamp every time I recive data from the COM, And check it with interval() every time.

setInterval(function () { if (Date.now() - lastDataTime > 1000 || !comStatus) { comStatus = false; port.close(); port = new SerialPort(comPort, function (err) { if (err) { error = 'Error: ' + err.message; return console.log(error); } }); } }, 1000);


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