U232 P9 Driver Windows 10 May 2026

Once the driver is installed, ensure your serial software (PuTTY, HyperTerminal, RealTerm) sees the adapter.

Advanced Settings (Latency): In Device Manager → Port Settings → Advanced → Set Latency Timer to 1 ms (for real-time data logging) or 16 ms (default for stability).

Right-click the problematic entry → Properties → General tab. Note the error code.

If you spend more than 30 minutes troubleshooting, consider this: genuine FTDI FT232 or Silicon Labs CP2102 adapters cost $10–15 and work natively on Windows 10 without driver hacks. The U232 P9 is legacy hardware from 2005–2010. While this guide will get it working, a modern adapter saves future headaches. u232 p9 driver windows 10