The software end of things consists of an Arduino sketch and an Android app ... One thing to note is that there are different firmwares for these HC-05 units. For more on that see this project.

[HC] took a gander around the Googles and saw a number of people trying to read NAND flash chips with an Arduino. It’s an interesting problem; at 16 Megahertz, [HC] is looking at about 60 ...