Octoprint-LCD-HD44780/README.md

Octoprint-LCD-HD44780

This Plugin allows you to connect a HD44780-compatible LCD screen to your Raspberry Pi running OctoPrint.

Currently, the screen size is fixed to 20x4 characters. The used GPIO pins are fixed, too.

Wiring

LCD PIN         | RasPi GPIO
----------------+-----------
Register Select | 15
Enable          | 16
Data 4          | 21
Data 5          | 22
Data 6          | 23
Data 7          | 24

See kunsi/rpi-atx-lcd-breakout for a breakout board which connects all the pins.