Summary: this is a WSGI web socket that allows OpenERP 6.1 web-POS to communicate with the selling machine LED Display (connected to a COM serial port), from javascript.

Basically It allows the OpenERP web-POS to run within the browser but still be able to communicate with the COM port and and local peripheral connected to the machine.

Any request, improvement or bug can be reported at: https://github.com/guerrerocarlos/OpenERP-ledDisplay/issues

It is released under the GPL v3 licence see file COPYING or visit http://www.gnu.org/licenses/gpl-3.0.html

• Download the latest .zip from https://github.com/guerrerocarlos/OpenERP-ledDisplay/downloads

• Unzip the file

• Execute:

   ServiceLauncher.exe -install
  

• Start it or/and configure to start automatically at Windows startup in the Windows Services Manager

• eventlet
• greenlet
• py2exe

The easiest way to install the dependences is grabbing the compiled installer at: http://www.lfd.uci.edu/~gohlke/pythonlibs/

Then execute

$ python setup.py py2exe

The Windows executable (Daemon) will be in the dist folder.

Add this function to your web-POS javascript file located in: addons_folder/point_of_sale/static/src/js/pos.js

    function ledDisplay(line1,line2){  
        try{  
            if (window.XMLHttpRequest)  
              {// code for IE7+, Firefox, Chrome, Opera, Safari  
              xmlhttp=new XMLHttpRequest();  
              }  
            else  
              {// code for IE6, IE5  
              xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");  
              }  
              xmlhttp.open("GET","http://localhost:8100/"+String(line1)+"___"+String(line2),false);  
              xmlhttp.send();  
            }catch(err){  
        }  
    }  

and use it however you want to show the progress in every sale for example this would generate something like in this README first image:

ledDisplay("OpenERP 6.1 POS","LED DISPLAY DAEMON");