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.

Select Update Driver. If Windows doesn't find a new driver, you can try looking for one on the device manufacturer's website and follow their instructions. Reinstall the device driver. In the search box on the taskbar, enter device manager, then select Device Manager. Right-click (or press and hold) the name of the device, and select Uninstall.
Download the latest drivers, firmware, and software for your HP LaserJet Pro MFP M126nw.This is HP’s official website that will help automatically detect and download the correct drivers free of cost for your HP Computing and Printing products for Windows and Mac operating system.

Open Start Settings Devices Printers & scanners. Select the name of the printer, and then choose Remove device. To reinstall the printer, select Add a printer or scanner and then select the name of the printer you want to add. If Windows doesn’t automatically find a new driver after the printer is added, look for one on the device.

Windows

(Manufacturer’s Chinese Info Link)

Download the Windows CH340 Driver
Unzip the file
Run the installer which you unzipped
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

~~Download the Windows CH340 Driver~~
~~Unzip the folder.~~
If you are running a 64Bit Windows: – run the SETUP_64.EXE installer.
If you are running a 32Bit Windows: – run the SETUP_32.EXE installer.
~~If you don’t know, try the 64 bit and if it doesn’t work, the 32 bit.~~
~~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.~~

~~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).

Uninstalling From Macinstosh

H-tronic Port Devices Driver Download For Windows 10 32-bit

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.

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

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

HomeUSB DriverDownload And Install Huawei USB Drivers For Windows

Huawei USB drivers is an important of all Huawei smartphones & tablets you can easily connect your device to a computer or laptop to sharing files & communicate between each other, when you installing Huawei USB drivers you will be able to update your Huawei to latest Android OS, and you can easily browse the file system on your Huawei & transfer your photos, videos messages contact… you can also take a back up to all your important data & you can restore it if you lost it.

It’s hard to connect a Huawei mobile with a computer without USB driver, but here you can download Huawei USB drivers & connect your Huawei with computer successfully.

Read Also: How to Flash Huawei P20 Stock Firmware – All Firmware

Notice: Huawei USB drivers compatible with Windows 7, Windows 8, Windows 10.

4How to Install Huawei CDC Driver

H-tronic port devices driver download for windows 10 pro

Download & Install Huawei USB Drivers:

Download Huawei USB Driver: USB Driver
Download Huawei ADB Driver: ADB Driver
Download Huawei CDC Driver: CDC Driver
Download Huawei VCOM Driver: VCOM Driver
Download Huawei Qualcomm Driver: Qualcomm Driver

How to Install Huawei ADB Driver

1- Open Device Manager in your PC Then Click on Action and choose to add the legacy hardware

2- Click Next & choose to Install the hardware that I manually select from the list (Advanced) then Click on Next

3- Tap on Show all devices, click on Next & click on Have disk

4- Select Browse Choose The Huawei USB driver file you downloaded and click OK

5- Choose the Android ADB interface and click on Next

6- The Huawei USB driver installation starts, click on Next, then click on Finish

How to Install Huawei Qualcomm USB Driver

1- Open Qualcomm USB Driver Setup File.exe

2- choose WWAN DHCP is not used to get IPAddress And Click Next

3- Then, Select Next

4- Choose I accept the terms in the license agreement and click Next

5- Click on Install To Begin The Installation

6- Click Finish.

How to Install Huawei CDC Driver

1- From the control panel launch Device Manager

H-tronic Port Devices Driver Download For Windows 10 64-bit

2- Click