Hello all I am new to Arduino and C++. I have used Arduino to make a USB device that runs on Windows 10. I now would like this Arduino code to use system variables to help decide what commands it runs. I have read that Arduino can not do this. The suggestion is to add your Arduino code to a Makefile. I am up for this. However, I cannot find any good tutorials on the web on how to do this. To be clear not how to use system variables in your sketch logic, but how to include your current sketch in a Makefile. Could someone point me to some instructions on how this is done using a Windows Computer? Thanks