Modbus Test Kit: a python implementation of the modbus protocol for testing purpose
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  License for use and distribution
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  Modbus TestKit Copyright
  (C)2009 - Luc Jean - luc.jean@gmail.com
  (C)2009 - Apidev - http://www.apidev.fr
 
  This is distributed under GNU LGPL license (see copying.txt for details)

  GNU LGPL information
  --------------------

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  Apidev www.apidev.fr., hereby disclaims all copyright interest in the
  library 'Modbus Test Kit' written by Luc JEAN.
  
  Apidev
  Luc JEAN
  296 rue Saint Pierre
  42810 Rozier en Donzy
  France