Usb Serial Ch340 Com3

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The CH340 chip is used by a number of Arduino compatible boards to provide USB connectivity, you may need to install a driver, don’t panic, it’s easier than falling off a log, and much less painful.

Browse the list below to find the driver that meets your needs. To see more matches, use our custom search engine to find the exact driver. Tech Tip: If you are having trouble deciding which is the right driver, try the Driver Update Utility for USB SERIAL CH340.It is a software utility that will find the right driver for you - automatically. Oct 10, 2017  Things I've tried are getting the download from wcn.com and using CH340 driver. My ports are USB 3.0, as suggested I tried lowering the receive and transmit buffer in USB serial CH340 (COM3) properties Com3 is it worth getting a USB 2.0 buffer?


Windows

(Manufacturer’s Chinese Info Link)

  1. Download the Windows CH340 Driver
  2. Unzip the file
  3. Run the installer which you unzipped
  4. In the Arduino IDE when the CH340 is connected you will see a COM Port in the Tools > Serial Port menu, the COM number for your device may vary depending on your system.

Older Windows Driver Version and Instructions

  1. Download the Windows CH340 Driver
  2. Unzip the folder.
  3. If you are running a 64Bit Windows: – run the SETUP_64.EXE installer.
  4. If you are running a 32Bit Windows: – run the SETUP_32.EXE installer.
  5. If you don’t know, try the 64 bit and if it doesn’t work, the 32 bit.
  6. In the Arduino IDE when the CH340 is connected you will see a COM Port in the Tools > Serial Port menu, the COM number for your device may vary depending on your system.

Macintosh

(Manufacturer’s Chinese Info Link)

(V1.3) Download the CH340 Macintosh Signed Driver for Mavericks (10.9), Yosemite (10.10) and El Capitan (10.11) and Sierra (10.12)

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.

OSX Sierra (10.12) Note

A kindly user, Maarten Segers reports

FYI, the driver documented here WILL crash on OSX Sierra.

Usb
Make sure to use this one instead: https://github.com/MPParsley/ch340g-ch34g-ch34x-mac-os-x-driver

I can personally not test on MacOS and can not vouch for the above drivers at github, but there you go.

See uninstalling information at the bottom of the page if the driver causes problems for you.

Here is an older version of the Mac driver, NOT FOR 10.12 Sierra

(V1.0) Download the CH340 Macintosh Signed Driver for Mavericks (10.9), Yosemite (10.10) and El Capitan (10.11)

Linux

(Manufacturer’s Chinese Info Link)

Drivers are almost certainly built into your Linux kernel already and it will probably just work as soon as you plug it in. If not you can download the Linux CH340 Driver (but I’d recommend just upgrading your Linux install so that you get the “built in” one).

Usb Serial Ch340 Com3

Uninstalling From Macinstosh

Arduino Ch340 Driver

A couple of Mac users have said “the driver crashes my mac Sierra how do I uninstall”.

Firstly regards the crash make sure you installed the 1.3 version of the driver, not the old one. You could download it directly from the Manufacturers Website in case they have issued an update since I wrote this page.

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Secondly a quick google search reveals that this is how you uninstall:

  1. Open a terminal and type: cd /Library/Extensions/
  2. Verify that the .kext file is present: ls grep usbserial.kext
  3. Output should be: usbserial.kext
  4. Then type: sudo rm -R usbserial.kext
  5. Verify that the .kext file has been removed: ls grep usbserial.kext
  6. Output should be empty.
  7. After you should remove the files stored in receipts folder: cd /private/var/db/receipts/
  8. Find the enties: ls grep usbserial*
  9. Output should be: codebender.cc.ch34xinstaller.usbserial.pkg.bom codebender.cc.ch34xinstaller.usbserial.pkg.plist
  10. Remove each one of the files of the above list: sudo rm -r filename`