Serial Port Programming using Win32 API

 https://www.xanthium.in/Serial-Port-Programming-using-Win32-API#account

 https://github.com/search?l=Pascal&q=tcomport&type=Code

 https://github.com/manashmandal/SerialPort

https://github.com/GCY/SerialPortLibrary

https://torry.net/pages.php?s=89

delphi comport library  asynchronous serial communications

 

 https://www.codeproject.com/Articles/992/Serial-library-for-C

Windows Std Serial Comm Lib for Delphi 5.4.1      Review     Screenshots     Technical   From: MarshallSoft Computing

5: Generation 2 Steam Heated Group Head - La Pavoni Lever Espresso Machine

 https://www.youtube.com/watch?v=qQaqW0SAJjs