WikiDevi.Wi-Cat.RU:Network/Hardware modifications/USB to Serial TTL Mod

Linksys WRT54G-TM

You only need 3 wires hooked up, RX, TX, and GND. The RST, +5.0v, and the +3.3v leads will not be used.

I bought the TM off EBay with the JTAG header, SD/MMC mod and dd-wrt already installed, because honestly I was worried I would not be able to complete the tasks properly. Now that I have completed my first Mod to it, I feel my worry was unwarranted. It was quite easy really. I will warn you now the images are quit large for detail.

USB to R232 Adapter

The first thing I did was to purchase the adapter. I got it off EBay for $22.46 total. It was a kit. The RST, +5v, 3.3v are not used.

Now to disassemble the router.

Now the first thing I had to do was to remove the vss and gnd wires for the SD mod for one cause I need that side of the header and the header itself needs to be installed there.

Now with the wire removed and the header soldered in....

Now mod the case, I used my cordless dermal to cut a hole in the case just above the word "reset"

Now to attach the adapter to the case. The adapter came with a foam pad in the package so I cut it in half to use as a spacer. I did bind over the pins on the adapter for clearance reasons.

View from the outside of the case....

Now on to hooking it all up. For the adapter only 3 wires are needed. It has 6 in the cable. So I used the 2 of the other 3 to put connectors on the SD mod wires. Which will be connected to the 3.3volt and ground pins on the side of the header not used. The first time i got this together it didn't work. Come to find out the Tx and Rx wires need to be crossed. In other words Tx to Rx and Rx to Tx.