U232 P9 Driver Windows 10 -

Use a terminal program like PuTTY or Tera Term:

Loopback test: Short TXD and RXD pins (pins 2 and 3 on DB9). Typing characters should echo back.

A: Yes – if you have a genuine Prolific PL-2303 HXD or newer chip, or an FTDI/Silicon Labs adapter. Old H or HX chips will fail. u232 p9 driver windows 10

When you plug a U232 P9 adapter into a Windows 10 PC (especially versions 1709 and later), you typically experience one of three scenarios:

The root cause: Microsoft updated its driver signing policy. Older Prolific drivers (pre-2012) lack proper SHA-2 signatures. Moreover, Prolific deliberately blocks counterfeit chips in newer official drivers. Since most U232 P9 adapters use cheap, cloned Prolific chips, the official driver refuses to work. Use a terminal program like PuTTY or Tera Term :

Some U232 P9 units use a WinChipHead chip. Try this if the Prolific driver still gives Code 10.

Step 1 – Identify the Chip

Step 2 – Install CH340 Driver

Step 3 – Verify