The Organiser II, with its brand-new USB ... an RS-232 port was available back in the day, it’s become hard to find, inspiring [James] to design a completely new module based on an Arduino ...

[Hans Peter] wanted to move away from using full Arduino boards in his projects. One of the components he rarely used after the development stage is the USB hardware. Once the firmware is flashed ...

i'm trying to buy a USB to RS-232 adapter for use with my M1 Mac Mini ... And then there's good old hobbyist stuff like Arduino, ESP32, etc that can use a serial interface. The Apple world ...