Update 5-May-2007 If you’re having trouble installing the CH340 drivers, Connect your arduous up, via the USB cable. Press WIN+X. Select Device manager. Under the Ports category, it will show the unrecognized USB device. Right click the unrecognized device. Choose “Update Driver Software…” Choose the “Browse my computer for driver software” option to manually go to the folder there you unzipped / Extracted the CH340 (or CH341 downloaded driver) file. Click on the ‘root’ CH340 file and then OK. The computer should scan the files in that folder and find the appropriate folder. If not then choose the ‘root’ folder and repeat the search. If it still doesn’t work, try downloading a different driver source and then repeat the whole procedure. The one I have is called “CH341SER” and is 199kB.
14-Sept-2016. The makers of the WeMos (Arduino like ESP8266’s) provide the CH340g driver: http://www.wemos.cc/downloads/ (now apparently called the CH341 driver) for Windows, Mac and info about Linus driver too. “Browse my computer for driver software”
I don’t trust many .exe files (usually in the megabyte size region!!) claiming to contain the drivers. To me drivers should be small files in the kilobyte range, so I trust the one on Github: https://github.com/HobbyComponents/CH340-Drivers (click on the “Clone or Download button” If that doesn’t work then you can e-mail me and I’ll send you a copy.)
Sorry folks it’s only for windows 32 and 64 bit versions. But Github seems very fertile for Linux stuff so I’m sure a search on Github will turn something up pretty quickly.