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UGREEN USB 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)

4.5 4.5 out of 5 stars 8,633 ratings
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Brand UGREEN
Connector type RS232
Cable type USB
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
Special feature Data Transfer

About this item

  • How It Works: UGREEN USB to RS232 DB9 serial adapter is designed for connecting to serial devices such as DB9-equipped serial modems, ISDN Terminal Adapters, digital cameras, label writers, palm PCs, bar-code scanners, PDA, etc through a USB port with 1Mbps data transfer rate
  • Plug and Play: Drive free for Windows 11/10/8.1/8, driver installation required for Windows 7/XP, Linux, and Mac OS
  • Connectors: With standard USB Type A male to standard 9-pin DB9 RS-232 serial connector
  • Conductor and Shielding: Tinned copper conductor(wire guage#24#28) and triple shielding ensure the best data transfer rate. Powered by a USB port, no external power adapter is required. Simple installation, plug & play after one-time driver installation
  • What You Get: USB 2.0 to Serial (9-Pin) DB-9 RS-232 Converter Cable
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Customer reviews

4.5 out of 5 stars
8,633 global ratings

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Customers say

Customers find the electronic cable reliable and easy to use. It has a good build quality and should stand up to repeated hard usage. They appreciate its simple installation and straightforward setup process. The drivers are automatically installed without needing the disc. Overall, customers consider it a good value for money and worth getting if you need to deal with modern RS232 equipment.

AI-generated from the text of customer reviews

304 customers mention ‘Functionality’295 positive9 negative

Customers appreciate the cable's functionality. They find it reliable, easy to use, and works with Windows 10 and 11. The USB2.0 interface allows for compatibility with various hardware. Many customers consider it an excellent product worth the price.

"Very pleased with USB cable, working fine on my Plotter" Read more

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

"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..." Read more

"Needed to connect an old unit to a modern PC. Plugged in and worked perfectly." Read more

97 customers mention ‘Build quality’97 positive0 negative

Customers appreciate the good build quality of the electronic cable. They say it works reliably, is well-made, and should withstand repeated hard usage. The Prolific PL2303 chipset is stable and as good as they get. The cable feels well shielded and is quite thick, much better than expected.

"...echo what others have said: It works, it works well, and it's really high quality. I'm using it with Windows 10, and have had no issues at all...." Read more

"...2. The quality of the USB cable itself feels substantial! It feels well shielded and is quite thick. Much better than I was expecting. 3...." Read more

"Works. Seems well made and looks durable...." Read more

"...port with no problems, works well and seems to be a solidly enough constructed cable...." Read more

63 customers mention ‘Driver installation’45 positive18 negative

Customers appreciate the easy installation of the driver. They mention that the drivers are automatically installed without needing a disk, and the UPS software works fine. Some customers also mention that the driver is included on a CD. The installation process is simple, plug-and-play on Debian and Windows.

"...With Windows 10 Home it performed an automatic installation of the driver and looked like it had generated a viable COM port...." Read more

"...is great - really nice frustration-free packaging design, little driver CD, gold plated connection (Is that really necessary?),..." Read more

"You have to install the SUPPLIED drivers" Read more

"Plugged unit in and windows installed drivers automatically. Worked first time .nuffsaid" Read more

62 customers mention ‘Ease of installation’62 positive0 negative

Customers find the installation process simple and straightforward. They mention it's plug-and-play on Debian and Windows, and that copying setup across without problems works as required. Some say Windows 10 seems to configure itself automatically. Overall, customers appreciate how easy the product is to use and how it simplifies their lives.

"I have been happy with this adapter having used it for 2 years. It installs easily...." Read more

"Got for use with a radio receiver worked great, was plug and play with Windows 11 didn't need to load any drivers." Read more

"...So is proper plug and play. Study, quality bit of kit. Works well. Would recommend." Read more

"...But this one... it just works. Gets the right driver first time. No hassle. Worth every penny. (I use Windows 7, Windows 10 and Linux.) PS...." Read more

51 customers mention ‘Value for money’51 positive0 negative

Customers find the cable offers good value for money. It works with modern RS232 equipment without costing too much.

"Good price and arrived within 2 days, well-packaged. I am using it for remote control of a Celestron telescope...." Read more

"...Gets the right driver first time. No hassle. Worth every penny. (I use Windows 7, Windows 10 and Linux.) PS...." Read more

"...Worth the exate few quid." Read more

"...quality, and at the end of the day, its a cable and it works without costing too much so ticks all the boxes." Read more

38 customers mention ‘Cable quality’38 positive0 negative

Customers appreciate the cable's quality. They say it works well, connects to Cisco appliances without issues, and communicates reliably with their hardware. Some mention it's an excellent serial adapter and much more affordable than Digitus.

"Very pleased with USB cable, working fine on my Plotter" Read more

"...Overall a very useful cable indeed." Read more

"...nice frustration-free packaging design, little driver CD, gold plated connection (Is that really necessary?),..." Read more

"This one seems genuine (Prolific chipset that is) and has not disconnected once...." Read more

23 customers mention ‘Port compatibility’19 positive4 negative

Customers appreciate the port compatibility of the product. They find it works well as a USB-serial adapter, allowing them to assign a suitable COM port. The genuine USB2.0 interface is appreciated.

"...1. It is a genuine USB2.0 interface, meaning it will work on hardware (like SoC based embedded systems) that have a USB2.0 interface that is not back..." Read more

"As per description, functions as described…" Read more

"...Device worked and allowed me to assign a suitable COM port. Then...pass through of COM1 to my VMware virtual Windows NT 4 system...." Read more

"...Windows 10 laptop detected the port automatically, plugged into the AC12.8 and detected it instantly...." Read more

29 customers mention ‘Compatibility’19 positive10 negative

Customers have mixed reviews about the adapter's compatibility. Some find it useful for connecting a laptop without a serial port to a Cisco switch or RS232 device, while others report issues with it not working with certain devices like label printers and USB3 hubs.

"...Instant connection to my windows 11 laptop. Now programming radio via Chirp software." Read more

"Doesn't work in OSX 15. The PL2303 driver is blocked in OSX and the CD is useless because modern MACs don't have optical drives." Read more

"...The adapter instantly connected the PC with the radio and I was able to complete the programming with ease. Great product." Read more

"Used for troubleshooting an embedded OPNsense system. No issues installing. I think I needed a standard serial cable in addition to this product...." Read more

Works with vintage sewing machine
5 out of 5 stars
Works with vintage sewing machine
You have to install the SUPPLIED drivers
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Top reviews from United Kingdom

  • Reviewed in the United Kingdom on 18 December 2024
    Item Display Length: 2 MetresVerified Purchase
    Very pleased with USB cable, working fine on my Plotter
  • Reviewed in the United Kingdom on 25 November 2024
    Item Display Length: 1 MetresVerified Purchase
    You have to install the SUPPLIED drivers
    Customer image
    5.0 out of 5 stars Works with vintage sewing machine
    Reviewed in the United Kingdom on 25 November 2024
    You have to install the SUPPLIED drivers
    Images in this review
    Customer image
    Customer image
  • Reviewed in the United Kingdom on 1 February 2022
    Item Display Length: 1 MetresVerified Purchase
    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.
    9 people found this helpful
    Report
  • Reviewed in the United Kingdom on 26 September 2024
    Item Display Length: 1 MetresVerified Purchase
    Works very well with Windows 10 and 11. Used it to control a relay board
  • Reviewed in the United Kingdom on 13 April 2024
    Item Display Length: 1 MetresVerified Purchase
    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.
    One person found this helpful
    Report
  • Reviewed in the United Kingdom on 3 January 2025
    Item Display Length: 2 MetresVerified Purchase
    Needed to connect an old unit to a modern PC. Plugged in and worked perfectly.
  • Reviewed in the United Kingdom on 20 February 2016
    Item Display Length: 1 MetresVerified Purchase
    I can only echo what others have said: It works, it works well, and it's really high quality.
    I'm using it with Windows 10, and have had no issues at all. Apparently it has a PL-2303 TA chip.
    And the presentation is great - really nice frustration-free packaging design, little driver CD, gold plated connection (Is that really necessary?), a protective cap over the USB connector (I've never even seen one of those before), even the little twisty-tie is nicer than the normal kind.
    Frankly I'd rather dispense with the luxury if it meant that I could pay less for a little cable that I'll never look at again after it's been installed, but Ugreen is fighting and uphill battle against the stereotype of cheap Chinese products, so I can't really blame them for going all out here.
  • Reviewed in the United Kingdom on 21 December 2017
    Item Display Length: 3 MetresVerified Purchase
    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.

Top reviews from other countries

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  • Carlos Vasquez
    5.0 out of 5 stars Excelente calidad. No me ha dado ninguna falla
    Reviewed in Mexico on 3 September 2024
    Item Display Length: 2 MetresVerified Purchase
    Excelente calidad. No me ha dado ninguna falla, fue una excelente inversión.
  • Ranilson Raposo
    5.0 out of 5 stars Qualidade do Produto
    Reviewed in Brazil on 28 May 2024
    Item Display Length: 2 MetresVerified Purchase
    Produto de ótima qualidade. Recomendo!
  • Emerson Martins Brito
    5.0 out of 5 stars Muito bom
    Reviewed in Brazil on 13 September 2023
    Item Display Length: 1 MetresVerified Purchase
    Só tive que baixar o driver da internet, do próprio site do produto, bem fácil de achar, vem um CD de instalação, mas não tenho leitor de CD.
    Customer image
    Emerson Martins Brito
    5.0 out of 5 stars Muito bom
    Reviewed in Brazil on 13 September 2023
    Só tive que baixar o driver da internet, do próprio site do produto, bem fácil de achar, vem um CD de instalação, mas não tenho leitor de CD.
    Images in this review
    Customer image
    Customer image
  • Noushad
    5.0 out of 5 stars Nice product
    Reviewed in the United Arab Emirates on 27 October 2024
    Item Display Length: 3 MetresVerified Purchase
    Good quality
  • Philip
    5.0 out of 5 stars Funktioniert perfekt (Windows 10, ohne Treiber)
    Reviewed in Germany on 22 October 2024
    Item Display Length: 2 MetresVerified Purchase
    Hatte erst gewisse Bedenken, aufgrund der negativen Bewertungen.
    Der Adapter funktioniert tadellos, wird sofort von Windows (10) erkannt und automatisch mit einem Treiber versorgt.