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.

Inside the following (USBSER.EXE) archives are inf files with needed Other software. Files presented below will help you to solve Windows Vista / XP problems with your device. Latest Other drivers for your ports device will increase the performance of operating system and pc in general. Setelah update Windows 10, saya mengalami masalah dalam pengisian program ke IC Flash Windbond 25Q32 dengan keterangan write timeout. Kemungkinan besar penyebabnya adalah driver yang sudah tidak cocok dengan Windows 10. Bila ada rekan yang mengalami masalah yang sama, silakan didownload programmer dan driver barunya. CH341A Programmer; CH341A. Ch341ser Driver for Windows 7 32 bit, Windows 7 64 bit, Windows 10, 8, XP. Uploaded on 4/16/2019, downloaded 332 times, receiving a 97/100 rating by 188 users. 32 bits drivers don't work and 64 is not available. More over CH340 is not able to distinguish between board A or B. Easy for load ups but not easy if you want to connect with a specific board. If you want to work with CH340 on Windows you need a 32 bits system.

Here is a step by step manual guide for USB-SERIAL CH340 software installation process on Windows 7 / 8 / 8.1 / 10 / Vista / XP. 1 Download USB TO RS485 drive.EXE file for Windows 7 / 8 / 8.1 / 10 / Vista / XP, save and unpack it if needed. 2 Switch on your new ports hardware. 3 Right click on the My computer icon and push Properties tab then.

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)

The following github has up to day pkg files for 1.3, 1.4 and 1.5 at time of writing, thanks to Joshua Wallis for bringing this to my attention…

Direct Download Links (from the github repo above):

See the github link above for installation instructions if you need them.

Previous macinstosh downloads if the above doesn’t work for you…

(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.

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).

Uninstalling From Macinstosh

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

USB-SERIAL CH341 Drivers Download | Arduino Uno R3 Clone ...

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.

Ch341ser Driver Windows 10

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

Ch341ser Driver Windows 10 Kmspico

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`