hc-05 could be a terribly cool module which may add two-way full-duplex wireless practicality to your comes. you’ll use this module to speak between 2 micro controllers like arduino or communicate with any device with Bluetooth practicality sort of phone or laptop computer. There area unit several robot applications that area unit already accessible that makes this method heaps easier. The module communicates with the assistance of us art at 9600 information measure thus its simple to interface with any micro controller that supports us art. We will conjointly piece the default values of the module by victimization the command mode. therefore, if you trying to find a wireless module that would transfer information from your PC or movable to micro controller or contrariwise then this module may be the proper alternative for you. But don’t expect this module to transfer multimedia system like photos or songs; you would possibly get to cross-check the csr8645 module for thatch this text.