Controlling electronics with the Commodore 64 user port - Part 4 of 4 with Arduino and LCD and OLED

Part four of four of a series where I explore the possibility to use the user port on an old Commodore 64 8-bit computer from the 80-s, to communicate with other electronic devices, self made or for example an Arduino device.

In this part I program the C64 using basic to send text messages to an LCD display via an Arduino. I also program the C64 to use a joystick to draw on an OLED display via an Arduino. I explain how the communication works, show how to connect everything, and how to program it in both the Arduino and the Commodore.

Electronicts kits I have purchased:
Arduino Starter Kit: https://www.kjell.com/no/produkter/el...
Jumper wire kit: https://www.ebay.com/itm/283551710430
UNO R3 basic kit: https://www.ebay.com/itm/143443111179
Electronics Component Basic Starter Kit: https://www.ebay.com/itm/283679804520