Directly controlling an LCD alphanumeric display

Alternatively, you can also drive the screen directly from the Raspberry Pi with the following connections:

We are not using the I2C bus here.

LCD

VSS

VDD

V0

RS

RW

E

DB4

DB5

DB6

DB7

LCD Pin

1

2

3

4

5

6

11

12

13

14

Raspberry Pi GPIO

6 (GND)

2 (5V)

Contrast

11

13 (GND)

15

12

16

18

22

 

The preceding table lists the connections required between the Raspberry Pi and the HD44780-compatible, alphanumeric display module.

The contrast pin (V0) can be connected to a variable resistor as before (with one side connected to the 5 V supply and the other to GND); although, depending on the screen, you may find you can connect directly ...

Get Raspberry Pi 3 Cookbook for Python Programmers - Third Edition now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial