/products/arduino/arduino-projects/b/blog/posts/casio-caclulator-bidirectional-arduino-communication---data-logging-remote-control-and-moreA discovery from 2007 fully exploited in 2026 - hacking the Casio calculator serial protocol The Arduino Uno is the board most schools already own for senior classes. Using these as cross-curricula sensor units requires adding a display, a keypad, SDen-USTelligent Community 12