Back to Arduino Support

Classic Nano is detected as unknown FT232R USB UART (Windows)

When connecting an FTDI FT232R-based device such as a classic official Arduino Nano to a Windows computer, it may show as a generic “FT232R USB UART” device with a warning sign in the Device Manager.

FT232R USB UART device with warning sign, under 'Other devices' in Device Manager

The problem can be solved by downloading and installing the latest FTDI driver.

  • Last edited:
Was this article helpful?
Do you want to contribute? Visit the Github repository
Return to top

Didn’t find what you were looking for?

Arduino Docs

Tutorials, data sheets, guides and other technical documentation.

Arduino Forum

Connect with the community, get help with your project, and discuss everything Arduino.

Arduino Discord

There are a lot of Arduino enthusiasts who are more than willing to help out. Head over Discord to start a discussion.

Contact Arduino

Need help with a product, need to make an exchange, or can't find a question answered? Email us and we'll answer as soon as possible.