The HC-05, a Bluetooth to serial bridge, can be found for around $5 on the internet and therefore may be the cheapest way to add Bluetooth connectivity to your project. However, its default ...

[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 ...