: Many of these devices use a CH340 or Prolific USB-to-Serial chip. If your computer doesn't recognize the device at all, you may need a CH340 serial driver .
To provide the most useful content, I have broken this down by the most likely devices. jp-80h driver
: A copy of the original driver CD (Version 6.33) is often available on GitHub repositories for those without a CD drive. Quick Setup Instructions Preparation : Many of these devices use a CH340