HC-03/05 SET ATCOMMANDS--------------http://elecfreaks.com/store/download/datasheet/Bluetooth/HC-0305%20serail%20module%20AT%20commamd%20set%20201104%20revised.pdf

HC Serial Bluetooth------------------http://www.exp-tech.de/service/datasheet/HC-Serial-Bluetooth-Products.pdf

modifiche possibili, NON PROVATE, ma magari utili--------------http://www.instructables.com/id/Cheap-2-Way-Bluetooth-Connection-Between-Arduino-a/