Which is why [Ahmad Byagowi] has started a project that aims to not only collect all the available schematics and datasheets that pertain to the machine, but to reverse engineer all of the ...

This repository contains a MicroPython library for commanding a HD44780 Liquid Crystal Display (LCD) controller via a PCF8574T GPIO expander. A PCF8574 GPIO expander can be accessed via a I2C bus.

This project includes a 12-button keypad interfaced with a host MCU via I2C or UART, designed to serve as a mini keyboard for embedded systems. The STM32L010K4T6 handles debouncing and key scanning, ...