I bought a 2x20 4bit lcd and a 4x20 4bit lcd. Both can also do 8bit. They both work with the HD44780 chip.
I want to use no more digital pins as absolutly needed. I had the idea 4bit work with only 4 data pins, but when i see a connection drawing... http://www.km5z.us/files/arduino-fm/4-bit-LCD_schematic.jpg Here I also see DI and enable. I understand you always need 6 pins on the arduino plus 5v power.
I'am new to Arduino, and never programmed a lcd. I see so many different codes, and a ton of librairies. Whats the best and easiest way to start working with my 4x20lcd? What librairies should I use? What are the differences, where can I see the most sample codes from? Whats smart to do here?