U232 P9 Driver Windows 10 May 2026
Complete Guide to the U232 P9 Driver for Windows 10: Installation, Troubleshooting, and Downloads
Meta Description: Struggling to connect your U232 P9 USB to Serial adapter on Windows 10? This guide covers driver download links, step-by-step installation, error fixes (Code 10, Code 31), and legacy COM port settings.
Pros and Cons
Assigning or Changing COM Port
Prolific USB-to-Serial Comm Port (COMx)
→ No yellow exclamation mark.
Method 2: CH340/CH341 Driver (If Method 1 Fails)
Some U232 P9 units use a WinChipHead chip. Try this if the Prolific driver still gives Code 10.
On Windows 10: plug device → open Device Manager (Win+X → Device Manager). Look under "Ports (COM & LPT)" or "Other devices" for unknown USB serial device. Right‑click → Properties → Details → select "Hardware Ids" to see VID_ and PID_ (e.g., VID_0403&PID_6001 for FTDI).
- Device not recognized by the operating system
- Serial communication errors
- Device malfunction
- Buy a new USB-to-serial adapter with FTDI FT232 or Silicon Labs CP2102 chip – they are fully Windows 10/11 compatible without hacks.
- Or use a USB-to-serial cable with built-in active electronics (e.g., Tripp Lite, Startech).
Installing and Updating U232 P9 Driver on Windows 10: A Comprehensive Guide