cannot solve pyserial dependencies in python 3 for Windows

[p-elsie]

I was not able to solve the dependency puzzle in 3.8 or 3.10. 

I gave up and used 2.7, where it works flawlessly.

I see that there was a similar issue in 2009. 

I was trying to compile this:

https://github.com/p-elsie/ttyUtil