Linksys WTR54GS v2.1

Overview
WTR54GS v2.0 and v2.1 devices probably have serial numbers starting with SJH1 (or maybe SJH2).

OEM SerComm (T600A-1.0MM)

Links of Interest
WTR54GS on the DD-WRT wiki
 * On the DD-WRT forums

WRT54G series on Wikipedia

Flashing dd-wrt
Supported by dd-wrt as of = v24 rc6

- download and install Sercomm utility

- download and unzip WTR upgrade file

-- for v1: WTRv1_sercomm.zip

-- for v2 and v2.1: WTRv2x_sercomm.zip

- download latest

-- for v1: RC5 mini or RC5 nokaid

-- for v2 and v2.1: RC5 micro

- download Linksys TFTP utility


 * 1) Set your PC's IP to 192.168.16.10
 * 2) Log into WTR at 192.168.16.1, password: admin
 * 3) Go to: Administration -> Factory defaults -> "Restore factory Defaults"
 * 4) Click "Continue"
 * 5) Close your browser window
 * 6) Set your PC's IP to 192.168.1.10
 * 7) Start Sercomm "Upgrade Utility"
 * 8) Select your ethernet adapter
 * 9) Press "Browse target" button
 * 10) MAC of your WTR will apear in "Devices List"
 * 11) Press "Files", select: for v1: WTRv1_sercomm.bin; for v2 and v2.1: WTRv2x_sercomm.bin, press OK
 * 12) Press "Upgrade", wait until upgrade completes, press OK
 * 13) Important: WAIT ANOTHER 3 MINUTES
 * 14) Start ping to 192.168.1.1 -t
 * 15) When reply with TTL=100, start tftp (command line or Linksys TFTP utility), transfer RC5 mini or nokaid for v1, for v2 & v2.1 you can only use RC5 micro.
 * 16) Observe ping, when TTL=64, you have dd-wrt installed.
 * 17) CONGRATULATIONS!

PS: If you don't get ping reply at 15, reboot (power cycle) and wait another 3 min.