Express server does not receive request, http module server does - node.js

Question

I am making a HTTP server for a Biometric device. I cannot make changes to the devices firmware. I can just add the server ip.
So I first made an express server to receive requests, but it didnt receive any. Later I made a server using http module of Nodejs and voila it was able to do so.
The problem is writing a server for a very big application in http module would be difficult and there is very less support available for it. I'd prefer to user Express. Any Ideas why express is failing?
Edit:
So someone asked for code here they are:
http module
var http = require('http');
var port = 7005;
var s = http.createServer();
s.on('request', function(request, response) {
response.writeHead(200);
console.log(request.method);
console.log(request.headers);
console.log(request.data);
response.write('hi');
response.end();
});
s.listen(port);
console.log('Browse to http://127.0.0.1:' + port);
Express Server:
var express = require('express')
var app = express()
var bodyParser = require('body-parser');
app.use(bodyParser.json()); // for parsing application/json
app.use(bodyParser.urlencoded({ extended: true })); // for parsing application/x-www-form-urlencoded
// respond with "hello world" when a GET request is made to the homepage
app.all('/', function (req, res) {
res.send('hello world')
console.log(req.method + " Request Aayi");
console.log(req.body);
});
app.listen(7005);