USB Serial – USB 2.0 RS232 Adapter with LED Indicators

(9 customer reviews)


This USB to Serial adapter is a tool of choice when supporting serial peripherals in newer computers without serial support. Now supported by Windows 10, this is an ideal solution for device support.


  • Easily connect to legacy USB-A ports
  • Plug and play function
  • Fully supports RS-232 signals
  • LED activity monitoring

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Model #: GM-FTDI2-LED Categories: , , , Tag:

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This USB serial device is a USB 2.0 to RS-232 serial adapter used to easily add a serial port to your computer even if they are unequipped with COM port ability. The GM-FTDI2-LED supports peripherals requiring a serial RS-232 connection. This USB serial adapter allows you to add  a single serial port and monitor the status of your connections by using LED activity flashes.

USB to Serial RS-232 Adapter with Type-A connector

When connection activity is present, the LED’s will flash letting you know you have signal on the pins. The GM-FTDI2-LED offers an advanced an FTDI Chipset supported by Windows 10. The device is powered individually by the USB 2.0 port and is easy to install with Plug & Play and easily tests RS-232 Host to Device link with backward compatibility with USB Spec 1.1.

Package Contents:

  • USB 2.0 RS232 Serial Adapter with LED’s
  • Latest FTDI Driver (available for download)
  • GM-FTDI2-LED Product Manual (available for download)


GM-FTDI2-LED full view with ferrite ring and USB connectorDevice Support:

  • PDA RS-232 Port support 56K Modem support Serial Mouse support+ Serial PC camera support
  • Fully compliant with USB Spec 2.0 Compliant USB Spec1.1
  • RS-232 – DB9 / M Data rate : Over 1000kbps
  • ESD Protection for RS-232 I/O’ +-15KV RS-232 for DTE Mode

We’ve written a blog post on Serial Driver Support including information on Windows Operating System life cycle.

DB-9 Pin Assignment
Pin Data Type Input/Output LED Color
1 IN Data Carrier Detect (DCD) Green
2 IN Receive Data Receive (RXD) None
3 OUT Transmit Data (TXD) Green
4 OUT Data Terminal Ready (DTR) Green
5 GND Ground Wire Red
6 IN Data Set Ready (DSR) None
7 OUT Request Send (RTS) Green
8 IN Clear Send (CTS) None
9 IN Ringing Indicator (RI) None


Additional Features & Specifications:
LED Color:

  • 1~4, 6~9 PIN Signal 0 : Green / Signal 1 : RED GND – RED – POWER PS. DB9-F PIN / 1,2,6,8,9 NO Input LED no light
  • Easy test RS-232 Host to Device link

OS Support:

  • Windows 7, 8, and Windows 10
  • Linux, Mac OS 10.X


Additional information

Weight .156 lbs
Dimensions 8.250 × 5.750 × .750 in




Supported OS

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Cable Length




USB to RS232


1 year from date of purchase.

Tech Note

Download page contains a special note with regard to driver install.

Alt Part No


Drivers & Manuals

9 reviews for USB Serial – USB 2.0 RS232 Adapter with LED Indicators

  1. Mobius

    Works perfectly, no additional drivers needed
    Worked (almost*) right out of the box. Tested only in Windows 10 64 bit.Needed to program a universal remote (URC MX-800, also should work with all other variants like MX-600, MX-700, etc). *The default latency was set to 16ms which made it not communicate with my equipment properly, but setting it to 1ms in device manager solved it.LED’s are nice and useful, you can see which lanes/pins are actively receiving or transmitting.Material of the case is good.Two things that could make this even more perfect in my humble opinion.Make the cable the same color as the case (smoke colored). As it is, it looks like something from 2003 or so with its see-through cable and being able to see the sheilding.Second, if they could somehow add a opaque piece of plastic between each LED so the light doesnt bleed into the holes next to it, it would look so much more nice looking and easier to read the LEDs.

  2. Aaron Chesney

    Works just fine, would buy again
    It reports to the OS that it is FTDI, who knows anymore. But it works absolutely fine, would buy again.

  3. Roger

    For Linux operating systems, activate the CONFIG_USB_SERIAL_FTDI_SIO config option and rebuild the kernel, or:# cd /usr/src/linux && make menuconfigLinux > Device Drivers > USB > USB Serial Converter > USB FTDI Single Port Serial Driver# make bzImage && make modules && make modules_install && make installShould see something within syslog similar to the following:Product: FT232R USB UARTManufacturer: FTDISerialNumber: XXXXXXXXDetected FT232RLFTDI USB Serial Device converter now attached to ttyUSB0

  4. Wulfie

    Rock solid connectivity so far
    The female connector screws refuse to come out, annoying since i cannot use the dongle directly on the equipment ,have to use a male female cable extension.

  5. Virgil N.

    Not a problem
    Plug it in and it worked

  6. JC

    Works great with Windows 10

  7. Rodney B

    Fast delivery
    Works, but found I didn’t need it right away.

  8. dontcrossme

    Worked great on multiple devices so far.
    I have had no issues connecting to, Watchguard, Cisco, Dlink, HP switch with this adapter and the Serial to RJ cable.

  9. Big John

    Okay. Usable – though not perfect
    It didn’t work for my project but I suppose I can use this cable. I will keep it. I like the data light feature, that’s the best thing about it.In terms of quality— It’s too expensive for the cheap looking design and feel.

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