UGREENUSB Serial Cable USB to RS232 DB9 9 pin Converter Cable for Connecting Cisco Routers and Switches,Celestron Telescope Nexstar hand Controller, Extron Crestron Products with PL2303 Chipset (2m)

Hmm, not much to say here. It works perfectly fine out of the box on Linux (not a given) so I doubt you'll have problems on Windows, maybe on Mac. Zero problems at all, does what it needs to - convert RS232 serial to USB. Have been using this with my Zoom dialup modem for tinkering but can be used for other things, such as connecting to the serial consoles of networking devices. Cheap and cheerful, and perfectly functional to boot.

It is functioning nicely as a means of controlling my NIR spectrometer via the spectrometer's parallel D25 serial connection, using a D25 to D9 serial adapter.My PC lacks the now scarce D9 serial port, so a USB to Serial D9 cable represents my only option. This Ugreen cable has a chip inside, in order for it to be recognised by Ubuntu 20.04 linux OS, which it is, natively.The NIR spectrometer software requires Windows XP or Windows 7 but a Virtualbox virtual machine (VM) runs both Windows OS's as guest OS's under Ubuntu 20.04 LTS host OS.This cable enables a serial connection on Virtualbox as serial host machine (not host pipe). Select the dummy guest Windows COM port, IRQ and address and save. Be sure to allow all users read access to the USB serial host device in a linux terminal, using: " sudo chmod 666 /dev/ttyUSB0".After setting up the VMs and configuring the serial connection it worked very well.I would have opted for a longer cable than the one metre length, had this been an option, but a Ugreen USB male to female extension cable privided the necessary reach from PC on my desk to table with NIR spectrometer.Overall a very useful cable indeed.

In summary, the best advice I can give you is to download the latest driver installation software from Prolific and use it to install the latest driver. If you then still have a problem, uninstall the driver and reinstall with 'run as administrator' selected.I bought this as an upgrade to another brand that used an earlier Prolific PL2303 chipset that worked well on Windows 7. However, on both versions of Windows 10 I had problems with installation.With Windows 10 Home it performed an automatic installation of the driver and looked like it had generated a viable COM port. However, when I tried using the Chipset Checking application it couldn't detect the type of PL2303 chip in use.With Windows 10 Pro I found that the driver did not automatically install. Even after downloading and installing the latest driver from Prolific manually, it was still listed in Device Manager as an 'Other device' without a driver. Looking at the error message available under the device properties in Device Manager gave me something to look for on the Internet. I eventually found that the device driver installation software needed to be 'run as administrator'. Once this was done the USB-RS232 adapter cable installed correctly when plugged-in. The Chipset Checking software identified the chipset as PL-2303GT.The driver version installed on the Windows 10 Pro PC was 5.1.3.0. On the Windows 10 Home PC the automatically installed driver version was 5.1.0.0. So I downloaded the latest driver installation software from Prolific and it installed the latest driver 5.1.3.0. This time, running the Chipset Checking software yielded the PL-2303GT chipset.Note that the Chipset Checking software is used to check that genuine Prolific chips have been used in the product and not counterfeit ones.

Works Perfectly, a download link to the driver would be helpful rather than the CD nowadays but once installed worked perfectly. Has kept our 25+ Year old clocking machine working like a dream! Thank you UGREEN!

Works very well with Windows 10 and 11. Used it to control a relay board

Always my go to make,

Confirming that this USB to serial port (RS232) adapter works with Windows 11 v24H2.This comes with a micro CD and on that in "<CD Drive letter>:\Windows\PL23XX_Prolific_DriverInstaller_v300(win11)" I ran "PL23XX-M_LogoDriver_Setup_v300_20210907.exe", it installed okay, works fine (using to update an old Marantz/Pronto programmable remote control).

Works fine, but I can't screw it to my Cisco serial to RJ45 cable, so I returned it. Came with a CD but I did not use it as I use Mac OS and it was plug and play.Wish I'd looked at the picture and known this 'cause otherwise it's a nicely made cable if you don't use Windows 7 and have to worry about drivers.