The CH340 driver allows Windows computers to communicate with USB devices that use WCH CH340-series USB-to-serial chips. It is commonly required for USB-to-serial adapters, Arduino-compatible boards, development boards, and other hardware that uses a CH340 USB interface.
This page provides the CH340 USB driver for Windows 11 and Windows 10, including instructions for downloading, installing, and verifying the driver.
CH340 Driver for Windows 11 and Windows 10
If Windows does not automatically recognize a CH340-based USB device, installing the appropriate CH340 Windows 11 driver can add the required USB-to-serial interface support.
The driver is supplied by WCH (Nanjing Qinheng Microelectronics), the manufacturer of the CH340 family. WCH's official support information identifies CH341SER_EXE as the driver package for CH340/CH341 devices.
Official CH340 driver download:
WCH CH340/CH341 Driver Download
CH340 Driver Download
Download the official Windows driver package and install it on the computer before connecting or using your CH340-based hardware.
The driver is commonly referred to as:
- CH340 driver
- USB CH340 driver
- WCH CH340 driver
- CH340 chip driver
- CH340 Windows driver
- CH340 USB-to-serial driver
- CH341SER driver
The exact device shown in Windows may vary depending on the hardware manufacturer and CH340 variant.
How to Install the CH340 Driver in Windows 11
Installing the CH340 driver is straightforward.
- Download the CH340 driver from the official WCH download page.
- Extract the downloaded package if it is compressed.
- Run the CH340 driver installer and follow the on-screen instructions.
- Restart Windows if requested, then connect the CH340 USB device.
After installation, Windows should detect the USB-to-serial interface.
Verify the CH340 Driver Installation
You can check whether the CH340 driver installation was successful through Device Manager.
- Connect the CH340 device to a USB port.
- Right-click the Start button and select Device Manager.
- Expand Ports (COM & LPT).
- Look for an entry such as USB-SERIAL CH340 (COMx).
The COM number can be different on each computer. Applications that communicate with the device should use the COM port shown by Windows.
CH340 Driver Not Showing in Device Manager
If the CH340 does not appear correctly after installing the driver, try these steps:
- Disconnect and reconnect the USB device.
- Try another USB port.
- Restart Windows.
- Check Device Manager for an unknown USB or serial device.
- Uninstall an incorrect or damaged driver and reinstall the CH340 driver.
- Try the device on another computer to determine whether the problem follows the hardware.
WCH has also documented cases involving counterfeit CH340 chips where driver behavior can differ from genuine WCH hardware.
CH340 Driver Windows 11
Windows 11 can use CH340-based USB-to-serial devices when the appropriate driver is installed. If Windows does not automatically provide the required driver, download the CH340 driver for Windows 11 and install it manually.
The same general installation process applies to Windows 10.
CH340 Driver Windows 10
For Windows 10, install the WCH CH340/CH341 driver package and then reconnect the USB device. Once recognized, Windows normally assigns the adapter a COM port that can be selected by serial terminal and programming applications.
What Is the CH340?
The CH340 is a USB interface chip from WCH that provides USB-to-serial communication. It is commonly incorporated into inexpensive USB serial adapters, microcontroller development boards, Arduino-compatible boards, and other electronics.
WCH's USB chip index categorizes its products under USB-to-single-serial and multi-serial applications.
CH340 Driver Installer
The WCH package can be used as the CH340 driver installer on Windows. After downloading the package, run the installer and follow the prompts.
For OEMDrivers, I'd use the actual filename if that is the file you're hosting, rather than calling it a generic "driver installer." That makes the download page more useful and avoids ambiguity.
Frequently Asked Questions
Where can I download the CH340 driver?
The official CH340/CH341 Windows driver is available from WCH's download page.
Download the official WCH CH340 driver
Does CH340 work with Windows 11?
Yes. CH340-based USB-to-serial hardware can be used with Windows 11 when the appropriate driver is installed.
Do I need a CH340 driver for Windows 10?
You may need one if Windows does not automatically recognize your CH340-based USB device.
How do I install the CH340 driver?
Download the driver, run the installer, follow the prompts, reconnect the CH340 device, and verify the assigned COM port in Device Manager.
How do I know if the CH340 driver is installed?
Open Device Manager and expand Ports (COM & LPT). A correctly installed adapter commonly appears as USB-SERIAL CH340 (COMx).
Is the CH340 driver free?
The WCH driver is provided for download by WCH. Use the manufacturer's download rather than third-party driver-updater software.
