listen.js

var PORT = 6798;
var HOST = '0.0.0.0';

var dgram = require('dgram');
var request = require('request');

var server = dgram.createSocket('udp4');

server.on('listening', function () {
    var address = server.address();
    console.log('UDP Server listening on ' + address.address + ":" + address.port);
});

server.on('message', function (message, remote) {
    console.log(remote.address + ':' + remote.port +' - ' + message);
    request.post('http://192.168.0.16:3000/writetofile',{
        json: {
            time: +new Date(),
            text: ''+message
        }
    }, function (error, response, body) {
	// console.log(error, response, body);
        if (!error && response.statusCode == 200) {
            console.log(body)
        }
    });

});

server.bind(PORT, HOST);