is a handy bit of electronics for a hacker to have. It is an extremely compact wireless router that ticks all the boxes:
* Supported by OpenWrt
* Cheap and easy to buy ($20 USD from eBay).
* Has a USB host.
* With a little work, it has a serial port.
* Small form factor.
What follows is a simple hack to add a serial port to your WR703N device. In essence, you just need to solder a couple of wires to some pads onto its PCB. I’ve decided to elaborate and show you how to do this properly.
For this hack you’ll need the following:
* A couple of strands of insulated wire-wrap wire and a heavier duty wire.
* A hobby knife.
* A sharp 0.8mm drill bit.
* A jewellery file.
* A hot glue gun.
* A 4 way 0.1” male header.
* A fine tipped soldering iron, solder, and a solder wick.
* A multi-meter (DMM).
* Reasonable soldering skills and good eyes!
This instructable is aimed for electronics and robotics enthusiasts. Exposing the serial port is only useful if you plan to custom firmware (i.e., OpenWrt
on it) and do some hacking. This mod will void your router's warrant and I take no responsibility if something goes wrong!