Driver can auto-download via Windows Update (Windows 7, 8, 8. Windows Vista, 7, 8, 8.1 Certified WHQL Driver Supports baud rates from 75bps to 12Mbps, multiple stop bit and parity types. Compatible with Windows 2000SP4 & Server2003 Easily add an RS-232 9-pin serial port to any computer with our PL2303-DB9 USB to Serial Adapter This adapter will let you connect older serial devices to modern computers, for terminal services, data transferring, remote control, and programming. Installer version & Build date: 1.12.0 () (For PL2303 HXA, XA, HXD, EA, RA, SA, TA, TB versions) Automatic handshake is supported at the Serial port. The USB bulk-type data is adopted for maximum data transfer. The two large on-chip buffers accommodate data flow from two different buses. This is the Prolific website read on the driver I installed:ĭownload File: PL2303_Prolific_DriverInstaller_v1.12.0.zip Prolific PL2303 USB to RS-232 Bridge Controller The PL-2303 operates as a bridge between one USB port and one standard RS232 Serial port. July for the ones from the download page) and so Windows prefers it over them. The problem is probably that the non-working driver is the newest (September 2021 vs. I had only one other entry, a 'ser2pl.inf' version ' 3.8.40.0'.ĭisconnect the device, and 'pnputil /delete-driver oemXY.inf' with the INF file you located in the previous step.Ĭonnect the device again, and it should work, at least, it does for me. Then 'pnputil /enum-drivers', and in the output look for Prolific drivers other than the ones from the previous step. It will add the two driver packages to the driver store and tell you what oemXY.inf files it has assigned to them. That is to say, you can install the right PL2303 driver like PL2303 3.3.2.102 via the system. What I did is this:įirst install the downloaded driver by unpacking the zip file and 'pnputil /add-driver *.inf /subdirs /install' (the /install is probably not necessary) from the extracted 'Win11_DCHU' directory. Getting it installed is a bit tricky, it seems. There is a working driver at, a bit down the page listed as 'DCHU (for PC Vendors)'.

Prolific pl2303 serial port driver