|TTL-USB cable picture stolen from ebay|
The thing was I couldn't make it to work in Windows 8.1. I discovered it is based on a Prolific chip and that there were a series of those which weren't supported by W8 nor W8.1.
|Shit Prolific says in its website|
|Prolific CheckChipVersion saying I bough shit|
Eventually, I made it to work with the following driver. It should work for W 7/8/8.1/10.