Hii arduino lovers. ;) I want to buy a new bluetooth module to drive my arduino Robot from PC or mobile(will develop an app soon) etc.. After a lot of research I am struck to choose one of these. The thing I am struck up at is the difference between these two modules,: one is bare HC-05 bluetooth module and the other one having an extra PCB soldered and attached to the lower side of HC-05.
http://www.rhydolabz.com/index.php?main_page=product_info&cPath=130_132&products_id=1169&zenid=b2daf55b4594ab9720c61f100abc7503 AND http://robokits.co.in/shop/index.php?main_page=product_info&cPath=7&products_id=354
what are the exact difference between these two boards and IF I can use the bare HC-05 module to interface directly with arduino(http://www.instructables.com/id/Cheap-2-Way-Bluetooth-Connection-Between-Arduino-a/) then why there is need to have other one..?? I wanted to know the exact technical difference between these two modules and which one I should go for and which one would be more advantageous..?? Please help with issue I am new to bluetooth protocols... :relaxed: