Please read the important notice at the end of this listing.

This serial to USB to TTL console cable enables you to connect your PC directly to the serial port of your WRT54g or similar device with 3.3V TTL level serial interface.

Length approx 90cm/3ft (if required, you can add a USB extension cable up to a total of 5m long).

A ten-way (2 x 5) header is included for you to solder in to the serial port on your router's main board. This gives access to either of the the two serial ports on the WRT54g. One end of the supplied cable has header sockets which connect to three pins on the serial port header, once it is installed. The cable uses the 3.3V logic levels required.

The other end has a USB plug which connects to the PC's USB port. The cable contains a USB to serial converter, which appears as a COM port on the PC.

The firmware on the router can usually be configured so you can log in on the serial port, which, for example, enables you to:

  • read boot messages on power-up
  • run commands even if SSH is not enabled
  • investigate network problems easily

There is a wealth of information on the web about making use of the serial ports on the WRT54g and other devices.

All you need on the PC is a terminal program, e.g. cu, minicom, gtkterm (Linux) or putty, hyperterm, TeraTerm (Windows).

Alternatively, you can control the serial port directly from software running on the router and send data to and from your PC.

This cable uses the highly regarded FTDI FT232RL chip which is guaranteed to work with all these operating systems:

  • Windows 10
  • Windows 8 and 8.1
  • Windows 7
  • Windows Server 2008
  • Windows Vista
  • Windows Server 2003
  • Windows XP
  • Windows ME
  • Windows 98
  • Linux
  • Mac OS X
  • Mac OS 9
  • Mac OS 8
  • Windows CE.NET (Version 4.2 and greater)
  • Android

32 and 64 bit operating systems are both supported.


  • Opening your router and especially installing the supplied header will invalidate your router's warranty.
  • Good soldering skills will be required to install the header.
  • You may damage or completely destroy your router through static, bad soldering or incorrect use of the cable.
  • We do not offer any support for router hardware or firmware, only for installing the cable drivers and hardware problems with the cable itself.
Installation and use is your responsibility and at your own risk.

Drivers and installation instructions on CD included.Latest drivers available from FTDI here. Driver installation guides are here.

FTDI USB to serial TTL console/debug cable + header for WRT54g etc. (OpenWRT, DD-WRT)

  • Brand: TechnoFix
  • Product Code: FTDIUSBWRT54G
  • Availability: In Stock
  • £14.99

Prices include VAT where applicable