Ruby on Rails : How to use TCP socket to connect with GPS Device -

ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-linux], rails 4.2.4

i using cloud9 ide , webrick server. project track gps in real time.

i want use tcp connection communicate gps tracking device requires transmit data in hexa decimal format 0x01. put following code in controller.

gps device protocol confidential. unable provide here.

my server running on port 8080. device sending data port.

but don't know how write code establish connection between our server , device , how transmit , view data sent device server.

i found on net . don't know whether correct or not.

 require 'socket'     server = tcpserver.new ("127.0.0.1",8080)     loop       thread.start(server.accept) |client|         client.puts "hello !"         client.puts "time #{time.now}"         client.close       end     end 

but causes following error.

address in use - bind(2) nil port 8080

if change port shows

bad gatewat error.502

kindly me. in advance.