If your computer does not automatically install the correct driver and assign a com port number to your device, you will need to manually install a driver. CH340 is the most commonly used one. 


  1. Download the CH340 Driver
  2. Unzip the file
  3. Run the installer which you unzipped
  4. You will see a COM Port number assigned to your machine. In most cases the number is not important.

(Manufacturer’s Link)



CH340 for High Sierra (10.13) or Higher

CH340 for Sierra (10.12)

CH340 for Mavericks (10.9), Yosemite (10.10) and El Capitan (10.11)

Inside the zip file you will find a PDF and a “pkg” file, short version, double-click the pkg file, the PDF has some extra information.

See this uninstalling information if you experience issues.

(Manufacturer’s Link)


Drivers should be built into your Linux kernel already, and it should work as soon as you plug it in.  If not you can download the Linux CH340 Driver (updating your linux install, so the driver is included is suggested).

(Manufacturer’s Link)

Original Source:



Some applications will require an alternate driver. A recent example is a brand new 2021 Thinkpad with USB C hub - the following driver was required to recognize a CR-10S Pro V2. 

FTDI F232R Windows Driver

FTDI F232R Mac Driver

How to manually install Windows drivers:



These drivers are provided as a courtesy. They are as-is and do not come with a warranty or support from Tiny Machines 3D.


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