These are some great DIY projects that you can do for cheap.

With the BlueDisplay library you create the GUI for your application, e.g. Graphics, Text, Buttons, Sliders and Charts on the Arduino itself. No Android programming required! The Arduino is connected ...

SSD1306 driver is Arduino style C/C++ library with unicode support. The library can be compiled for plain Linux (for example, raspberry spi), or you can use it with plain avr-gcc compiler without ...