HD44780 2004 LCD display 4x20 characters blue

This 20x4 LCD module with an integrated HD44780 controller allows the display of 20x4 characters in white font on a blue background. The display is controlled via an Arduino, Raspberry Pi, or similar. The display can be connected directly to the GPIO ports of the e.g. Arduino. 

The assignment of the 16 contacts is as follows: 

VSS: GND (ground 

VDD: +5V supply voltage 

V0: contrast voltage, this can be between 0V and 5V 

RS: register, selection 0:command register, 1: data register 

R/W: 1:Read/0:Write contacts 

E: Enable 

D0: Data line 

D1: Data line 

D2: Data line 

D3: Data line 

D4: Data line 

D5: Data line 

D6: Data line 

D7: Data line 

A: Anode of the backlight 

K: Cathode of the backlight