If your cheap Arduino clone stopped working recently you’re probably experiencing FTDIgate 2.0. I won’t go in deep details here because I already spent too many hours solving...
Category - Software
Arduino Nano v3.0 clones (How-to & Review)
If you need a breadboard-friendy, well documented and supported Arduino board, your best choice is a Nano. Unfortunately an original Arduino Nano could cost you around $30 plus shipping so...