USB Driver
CH340 / CH341 Windows Driver
Official WCH USB to Serial converter driver for Windows 11, 10, 8, and 7 (32/64-bit). Essential for Arduino UNO SMD & Nano clones.
Essential Driver
Download the CH341/CH340 Driver
The CH341/CH340 is a USB-to-serial converter chip used in many low-cost Arduino boards, especially the Arduino UNO SMD (Surface Mount Device) and NodeMCU ESP8266 versions.
Available Software, Drivers & Reference Docs
How to Install the CH340 / CH341 Driver
Follow these 3 simple steps if your computer fails to detect your Arduino or ESP32 board in Arduino IDE.
1
Download & Extract
Click the Download button above to get the CH341SER.ZIP package for Windows or .PKG for Mac, then extract the files to a folder.
2
Run SETUP.EXE as Admin
Open the extracted folder, right-click on SETUP.EXE, select "Run as administrator", and click the INSTALL button.
3
Connect & Select COM Port
Plug in your board with a data-compatible USB cable. Open Device Manager / Arduino IDE: your new USB-SERIAL CH340 (COMx) port will appear!