UGREEN USB to RS232 DB9 9-Pin Serial Cable, PL2303 Chipset, 2m

Like many people, I rarely need an RS-232 serial connection these days—but when you do need one, nothing else will do. I bought this specifically to update the firmware on my Denon DN-500AV, which requires a traditional serial connection. Modern laptops obviously don't include RS-232 ports anymore, so this adapter was exactly what I needed. The installation was straightforward, my Mac recognised the adapter without any issues, and the firmware update completed successfully on the first attempt. When you're updating firmware, the last thing you want is an unreliable connection, so I was pleased that it worked flawlessly. The adapter itself feels well made, with a decent-quality cable and solid connectors that don't feel loose or flimsy. I've gradually become a fan of UGREEN accessories over the years. In fact, while travelling in Guangzhou, China, I even made a point of visiting one of their retail stores. Everything I've bought from them—whether it's charging cables, display cables, hubs or adapters—has been consistently reliable, and this serial adapter is no exception. RS-232 may be old technology, but plenty of professional AV equipment, industrial devices and networking hardware still rely on it. If you need a dependable USB-to-serial adapter for maintaining legacy equipment, I'd happily recommend this one.

Works just as described. I use this cable to connect my car ECU to my laptop. There were no issues and no need to change any wiring. The quality of the components and cable is good. It's lasted quite a while.

Worked first time with a fully updated windows 11 desktop computer, needed a serial port to usb cable and this just worked, no drivers to install, always had good results with anything UGreen…. So 10/10 for this item…

I have been happy with this adapter having used it for 2 years. It installs easily. However, I've just spent quite a lot of time trying to get it to receive at 31.25kHz (same speed as MIDI) and found it just will not do so, presumably the chipset only accepts a standard range of baud rates (e.g. 9600, 19200, 57600 etc). For those rates it is a good choice. But for something less standard you'll need something else. In my case luckily I also have a Startech USB to Serial lead, and that does work fine at 31.25kHz. On the other hand, the UGreen has a higher top rate. So, horses for courses. Amazon has again asked me to rate this product for "Sheerness". I've never been to Sheerness so my 5 star Sheerness rating is entirely arbitrary and should not be used as the basis for any actual evaluation of Sheerness.

Used to connect an OMEX710 ECU to a Windows11 laptop - worked perfectly

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.

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.

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.

Enfin un cable RS232 qui fonctionne bien

Inside the Box have Cable and Driver installation Disk, and tested and working fine.

Kargo söylendiği hızda geldi

Das Kabel ist vollkommen in Ordnung und funktioniert zuverlässig. Die Verarbeitung wirkt solide, die Verbindung ist stabil und es erfüllt seinen Zweck ohne Probleme. Von uns gibt es volle Sterne.

Es compatible con windows 10, el cable es muy flexible y de buena calidad. Perfecto para utilizarlo en una lap-top o una pc de escritorio que no cuente con el puerto serial.