Download the CH341SER.ZIP file and extract its contents to a folder on your computer.
A: Check Tools → Port → correct COM. Also try pressing reset button on board right before upload starts. ch340 driver windows 11
Windows 11 has stricter security settings than Windows 10, so the installation process is slightly different. Download the CH341SER
Here's a brief summary of the CH340 driver for Windows 11: ch340 driver windows 11
For the most reliable and up-to-date version, you should download the driver directly from the manufacturer, .
No more "Unknown USB Device" 🔧