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The UGREEN USB to RS232 DB9 Serial Cable is a 1-meter adapter featuring a professional PL2303 chipset and triple shielding for stable 256kbps data transfer. Compatible with Windows, macOS, and Linux, it offers plug-and-play convenience on most modern OS versions and supports a wide range of legacy serial devices. Powered directly via USB, it requires no external power source and is built with durable materials to ensure long-lasting performance for professionals maintaining legacy hardware.











| ASIN | B00QUZY4UG |
| Best Sellers Rank | 2,805 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 1 in Serial Cables |
| Brand | UGREEN |
| Brand Name | UGREEN |
| Colour | Black |
| Compatible Devices | router, modem, pc, gps, barcode scanners, barcode machines, serial modems, digital cameras, card readers, PDAs, mobile phones, PDAs/ISDN terminal adapters |
| Compatible devices | router, modem, pc, gps, barcode scanners, barcode machines, serial modems, digital cameras, card readers, PDAs, mobile phones, PDAs/ISDN terminal adapters Compatible devices router, modem, pc, gps, barcode scanners, barcode machines, serial modems, digital cameras, card readers, PDAs, mobile phones, PDAs/ISDN terminal adapters See more |
| Connector Type | RS232 |
| Connector type | RS232 |
| Country of Origin | China |
| Customer Reviews | 4.6 out of 5 stars 9,281 Reviews |
| External Testing Certification | 177202201739 |
| Item Dimensions | 15.8 x 2.5 x 22.2 centimetres |
| Item Weight | 0.1 Kilograms |
| Item dimensions L x W x H | 15.8 x 2.5 x 22.2 centimetres |
| Manufacturer | Ugreen Group Limited |
| Manufacturer Part Number | 20210 |
| Model Number | 20210 |
| Number of Items | 1 |
| Package Quantity | 1 |
| Power Plug Type | No Plug |
| Product Finish Type | Matte |
| Specific Uses For Product | PC |
| Specific uses for product | PC |
| Unit Count | 1.0 count |
| Warranty Type | Limited |
B**Y
Exactly what I needed for legacy serial equipment
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.
D**D
Good Quality, Durable and Correctly wired
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.
M**Y
Just worked 100%
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**B
Good, But Doesn't Do All Baud Rates
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.
S**R
OMEX710 ECU compatible
Used to connect an OMEX710 ECU to a Windows11 laptop - worked perfectly
D**D
nice product
nice product
P**W
Working with Linux, Virtualbox and Windows XP/7
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.
O**L
Good, but I didn't look at the picture properly.
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.
M**W
Good Quality Product
Inside the Box have Cable and Driver installation Disk, and tested and working fine.
K**N
Motor sürücüsü için aldım gaytet kaliteli ve güzel
Kargo söylendiği hızda geldi
A**X
Für RS232 Anwendungen perfekt
Da ich immer noch Geräte besitze die nur via RS232 bedein werden können suchte ich nach einem passenden USB2RS232 Adapter. Es gibt ja massig davon nur nicht jeder funktioniert auch. Da profilic mittlerweile Fernost-Clones durch den Treiber aussondiert, muss man also genau aufpassen. Allerdings weis man das leider erst hinterher. Nun bei diesem Produkt muss man sich keine Gedanken machen. Verbaut bei meiner 2m Variante ist der PL2303TA Chip (Max Baudrate 6Mbps) Unter WIndows 7 wird er nicht automatisch erkannt, hier muss man sich das Treiberpakte einmal runterladen und installieren. Aktuell war es bei mir der Installer V 1.14.0 Wer gerne wissen will, welcher Chip bei sich verbaut ist, ruft das im ZIP Paket verfügbare Programm: checkChipVersion_v1006.exe auf. Wählt den COM Port und schaut was das programm sagt. Vorraussetzung ist allerdings ein einwandfrei instalierter Treiber. Den Com Port, welchem dem Adapter zugewiesen ist, sieht man im Gerätemanager unter Anschlüsse (Com & LPT). Die Treiberinstallation war innerhalb von 5sek erledigt und der Adapter ist einsatzbereit. Aktuell habe ich es mit meinem Morsekeyer getestet und es funktioniert auf anhieb, Andere Geräte habe ich noch nicht probiert. Zu erwähnen sei noch das man die Parametrierung des Adapter anpassen kann (im Gerätemanager). Neben den üblichen Einstellungen wie Baudrate, Datenbits, Parität,Stopbits und der Flusssteuerung unter Erweitert noch den FIFO Puffer (TX/TX) und den zu verwendeten Com-Port. Fifo sollte man immer so lassen wie er ist (max Werte). Bei dem Com-Port muss man wissen, dass nur die genutzt werden können, die noch nicht belegt sind. Hier steht dahinter dann belegt. Jetzt kann es sein, dass man aber ein Comport nutzen muss der im Bereich von Com 1-4 liegt, hier aber schon belegt steht. Problem ist wenn man schon mit einigen Adapter hantiert oder USB Geräte hat, die intern im Grunde auch nur ein USB auf RS232 Adapter integriert haben dann dieser Com-Port durch denTreiber belgt wird. Wenn man ganz sicher weis, das man den anderen nicht mehr nutzt oder nicht gleichzeitig benutzt, kann man diesen trotzdem nutzen und den Warnhinweis auf die schon genutzen Port bestätigen. Fazit: Einfaches Plug and Play und es funktioniert (Win7) Gute Verarbeitung mit vergoldeten Kontakten der Anschlüsse.
E**C
Compatible y de buena calidad
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.
M**N
Excelente calidad
Excelente calidad, se siente más robusto que otros y al mismo (o menor) precio, los acabados también se ven mejor. Funciona bien y se ve muy bien.
Trustpilot
3 days ago
1 week ago