USB Serial – USB 2.0 RS232 Adapter with LED Indicators


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

Product Documents

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


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


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