USB to RS323 CH340G convertor module is used to interface and program Arduino Pro Mini.
Link to code:
https://akuzechie.blogspot.com/2021/0...
Contents:
0:00 Introduction
0:18 USB-RS232 Convertor Module Specs
0:52 Convertor-to-Pro Mini Interface
1:23 Loading C++ Sketch into Pro Mini
1:36 Demonstration
1:57 Conclusion