LCD screen tutorial.

Hello,

I got that two lcd screens and want to use it with volumio but cant find andy detailed tutorial to run them. Can you please help me. how can i install and run them. Thanks.

20x4: geekbuying.com/item/I2C—II … 43390.html and
16x2: geekbuying.com/item/I2C—II … 43389.html