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 (1m)

Used this to debug a device that only supported serial connections, you may need to install a usb driver to convert the serial to usb for mac or windows but the cable works.

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.

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.

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.

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).

Very pleased with USB cable, working fine on my Plotter

Good price and arrived within 2 days, well-packaged. I am using it for remote control of a Celestron telescope. Note that for some versions of Windows - I am using Windows 7 - the cable needs a driver installed from the supplied CD for it to work, but once this is done it becomes "plug and play". The instructions say that there is also a utility program to check the chip version (presumably because the chipset used is apparently widely counterfeited), but I could not find this on the supplied CD. I downloaded the driver from the website mentioned in the manual on the CD (it's always a good idea to check for a newer driver online anyway) and this did include the utility to check the chipset version. Apart from that little glitch, I would recommend the product and the service from the supplier.As an aside for those intending to use this to connect to a Celestron telescope, the instructions supplied with the telescope are to say the least a bit vague! You need to connect the lead supplied with the telescope to the RS232 socket on the end of this lead (obvious) - but the other end of the lead supplied with the scope goes into the socket hidden away in the base of the hand controller on the telescope, NOT into the "Aux" socket on the tripod, and NOT as I assumed at first into the socket on the tripod that the hardware hand controller is plugged into.

Works fine on Windows 10. I bought it to control a SkyWatcher telescope and that is just what it does. However I also want to use it with an older Vista laptop as I want the laptop outside and I will live with that system being occasionaly exposed to damp humid conditions. The drivers will not load on this system and although I had an email from Ugreen customer service telling how much they cared about their customers, emailing them about this brought absolutley no response hence 3 stars.