LCD displays are not the only option when we have to display content on an external screen through the I2C or SPI buses. There are also OLED dot matrixes that allow us to control a specific number of dots. In OLED dot matrices we have control over each dot, instead of controlling each character space. Some of them are grayscale and others RGB.
The key advantage of OLED dot matrixes is that we can display any kind of graphics and not just text. In fact, we can mix any kind of graphics and images with text. The Grove OLED Display 0.96" is an example of a 16 grayscale 96-by-96 dot matrix OLED display module that works with the I2C bus. The following URL provides detailed information about this breakout board: http://www.seeedstudio.com/depot/Grove-OLED-Display-096-p-824.html. The Xadow RGB OLED 96x24 is an example of an RGB color 96-by-64 dot matrix OLED display module that works with the SPI bus. The following URL provides detailed information about...