for the "USB Device Not Recognized" error often associated with this chip?
sudo usermod -a -G dialout $USER
Supports baud rates from 300 baud to 3 Mbaud . ft231x usb uart driver
The FT231X is a USB-to-serial UART interface IC from Future Technology Devices International (FTDI). Unlike its predecessor, the FT232R, the FT231X offers a smaller QFN-20 package and supports full-speed USB (12 Mbps) with a configurable I/O voltage range from 1.8V to 3.3V. The device appears to the host computer as a virtual COM port (VCP). The driver’s primary function is to translate USB packets—formatted according to the FTDI proprietary protocol—into standard operating system serial API calls (such as CreateFile on Windows or open on POSIX systems). In essence, the driver makes a USB device masquerade as a legacy RS-232 port, allowing software like PuTTY, Tera Term, or a custom Python script ( pySerial ) to interact with the FT231X as if it were a built-in COM port.
dmesg | tail -20
You will see lines like:
Are you connecting a specific device, like an or a telescope , that I can help you configure further? FT231X USB UART Driver - AliExpress for the "USB Device Not Recognized" error often
: Right-click the downloaded ZIP file and extract it to a folder on your desktop.
FTDI provides both a VCP driver and a D2XX direct driver (which bypasses the COM port emulation for higher performance). The VCP driver installs a virtual COM port in Device Manager, typically enumerated as COMx . Historically, Windows required manual driver installation, but modern versions can often fetch the driver via Windows Update when the device is first connected. The driver stack handles USB control transfers, bulk data transfers, and state management (baud rate, data bits, parity, stop bits). Unlike its predecessor, the FT232R, the FT231X offers
Includes 2048 bytes of on-chip memory to store custom device descriptors (like your company name or custom VID/PID). Logic Levels: Supports a wide range of I/O voltages from
Windows is the most common environment for driver issues due to automatic updates, driver signing, and legacy conflicts.