Wrt54g dual serial port

Remember, this will void the warranty on your router. I take no responsibility for your actions. You can either solder the included DB9F PCB-mount connector onto the board and mount that to the front of the case , or do as I did and extend the connections using wires to allow a new DB9F connector the kind which is normally connected to the end of a cable instead of mounted on a PCB to be mounted through the front of the case with the metal plate on the front covering the ugly hole.

Use the holes in the case a a guide they line up exactly with the mounting holes for the DB9F connector. I left the connections between the ADBK PCB and the DB9F connector to last just before closing up the case , and it was a bit tricky but worth the effort to get a good looking finish.

The second serial DB9M connector which I mounted on the top of the case is connected to the other end of the wires as follows:.

If you find any ambiguous or non-obvious instructions on this page, or have any trouble at all in following the instructions, then please let me know. The no flow control part is especially important. Now when I boot up the router, I can see all of the debugging information. Now with this serial port I can experiment with vlans and other things that can break your SSH session. They are too loud to keep by my desk.

If you like this article, you can support my site by using this link to buy your next WRT54G from Amazon. As I stated in my other thread, your ideas here regarding a serial port on the little devils are truly amazing.

In fact your idea scores right up there with one created by Rod Whitby. So far I have serial modded two out of the five that I have sitting here. To connect up an alternative power supply, open up the case and locate the small black connector where the power input goes. You can as shown in the picture above desolder the power connector this took quite a lot of effort and I broke the connector in the process. If you want to keep it just solder to the underside of the board instead, you might need to file away a bit of plastic from the outer casing to make room for the wires.

There are 3 legs to the power connector, each just under 1cm long. The one closest towards the front of the router the LED side and running across the router is the positive red wire in the picture.

The one in the middle, running from back to front is the ground black wire in the picture. Just solder a wire to each of these and connect to your power supply of choice. Connect the yellow wire 12 volts to the positive side and one or both of the black wires to the ground. You can also use a 12 volt lead acid battery e. These can peak at around 14 volts when fully charged, but this doesn't seem to cause any problems for the router. NVRAM is only used as environment for the bootloader. The TFTP method is also the recommended way to restore the original Linksys firmware or switch to other third-party firmwares.

Linksys original firmware are hard to find on the internet, and are no longer made available by Linksys. This is particularily handy if you want to change of OpenWRT version or simply test another one while you already have one installed. When you're done with tftp, just wait two or three minutes and reboot the router Unplug the power cord, and plug it back , and the original Linksys firmware should be running.

If you have already installed OpenWrt and like to reflash for e. Feel free to explore the rest of sysupgrade options by typing 'sysupgrade' in the terminal. The instructions from the Tomato upgrade instructions are confirmed to work with Backfire Unverified Information! This page or section contains unverified information. Remove this notice if you can ensure its correctness.

After successfully running a late model version of Kamikaze. I had some stability issues decided to go with white russian, I downgraded with the web gui to the latest default version of openwrt-brcm These instructions are linux specific, if you are running any other OS your mileage may vary.

I was able to get into failsafe mode consistently by hitting the reset button for 2 seconds after the DMZ led lights up.

Unit is now available at Get the code into the tmp directory of the WRT from the failsafe telnet session and then overwrite the firmware with the new image using mtd. I had to unplug to make it reload.

Make sure the commands you have previously typed have finished completely before you pull the juice. According to Internet sources your WRT may be fixed at this point. Mine still would not come up, it seems that I had some nvram variables mucked up, so back to failsafe again.

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