Cellphone Controlled Retro-radio Stores And Plays Your Digital Library

August 24, 2011 by Mike Szczys 6 Comments

[Autuin] was worried about having desirable electronics stolen while on the road with his band. He didn’t want to take a laptop along on tour, but he didn’t want to be without his music either. To solve this problem, he built a music player inside of a cheap-looking radio. His write-up covers two different portable MP3 solutions, but it’s the second rendition that catches our attention.

After hollowing out the old radio he filled the void with an Asus WL-HDD 2.5. That hardware is meant to be an easy way to add network storage; it houses a laptop hard drive and has WiFi and Ethernet connectivity. But it also has one USB port, and can be hacked to add a second. [Autuin] did just that, using the two USB connections to add a Bluetooth dongle and a USB sound card. Music is synced with the hard drive via some cat-5 cable that’s hidden in the battery compartment of the vintage box. The NAS runs Linux, and the audio playback software is controlled though a Mobile Java application running on a somewhat broken cellphone. That’s an idea that might find its way into our next project.

Using A Router As A Linux-based PID Controller

July 21, 2011 by Mike Nathan 23 Comments

espresso_machine_pid

[Nathan] had an small router kicking around and thought that he might as well put it to good use. He had always been interested in getting a better handle on his espresso machine, and figured that the router would be a perfect Linux-based PID controller.

He installed OpenWRT on the router, then disassembled it in order to get access to the router’s GPIO pins. He built a small PCB that allows him to get temperature info from the machine to the router using i2c. [Nathan] put together a PID package for OpenWRT, allowing him to control the machine over SSH, though he may build in a user-friendly web interface sometime in the future.

He says that most espresso machine PID controllers he has seen come in the form of big ugly boxes slapped on the side of the machine’s case, though we have to disagree with him on that point. Opinions aside, he is going for a minimalist design, and while he says that he is only about half way through the project, we think things are looking promising so far.

When everything is said and done, we hope to get a much closer look at all of his code, schematics, and more information on the router he used as well.

Measuring Home Networks With BISMark

July 9, 2011 by Mike Szczys 18 Comments

The Broadband Internet Service BenchMARK is an open source initiative to put tools in the hands of the common Internet user that will make measurement and analyzation of home network traffic easier. It targets LAN and WAN network utilization by measuring latency, packet loss, jitter, upstream throughput, and downstream throughput. Of course gathering data isn’t worth anything unless you have a way to present it, and to that end the Project BISMark team has been developing a web interface where you can view the usage of anyone who’s running the firmware.

The project builds on top of OpenWRT, which means that you should be able to run it on any router that’s OpenWRT compatible. This includes the ubiquitous WRT54G routers and many others. We remember when DD-WRT added bandwidth monitoring as part of the standard release, which really came in handy when the stories about ISP bandwidth capping started to hit. We’re glad to see even more functionality with this package as it can be hard to really understand what is going on in your network. After the break you’ll find a video detailing the features of BISMark.

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Reverse Engineering VxWorks (which Replaces Linux On Newer Routers)

July 8, 2011 by Mike Szczys 25 Comments

The Linksys router seen about is a WRT54G version 1. It famously runs Linux and was the source of much hacking back in the heyday, leading to popular alternative firmware packages such as DD-WRT and Tomato. But the company went away from a Linux-based firmware starting with version 8 of the hardware. Now they are using a proprietary Real Time Operating System called VxWorks.

[Craig] recently put together a reverse engineering guide for WRT54Gv8 and newer routers. His approach is purely firmware based since he doesn’t actually own a router that runs VxWorks. A bit of poking around in the hex dump lets him identify different parts of the files, leading to an ELF header that really starts to unlock the secrets within. From there he carries out a rather lengthy process of accurately disassembling the code into something that makes sense. The tool of choice used for this is IDA Pro diassembler and debugger. We weren’t previously familiar with it, but having seen what it can do we’re quite impressed.

[Image via Wikimedia Commons]

Retro-radio: Building On Another WiFi Radio Hack

July 6, 2011 by Mike Szczys 14 Comments

[Jay Collett] likes listening to Internet radio stations and decided to build his own standalone hardware that lets him listen without being at his computer. But he wasn’t starting from square one on this project. [Jay] built on the epic instruction set that [Mighty Ohm] published when he first built his own WiFi radio.

Both of these radios used the same method of getting onto the internet; a hacked router. We kind of like this because it means you should be able to use the radio as a bridge for wired Ethernet devices. But we digress. [Jay] departs from the instructions by using an Arduino and its IDE to interface an LCD screen with a different line/column orientation than the original, and to implement a different control scheme. This makes the project a bit more approachable if you prefer not to roll your own electronics.

Take a look at the video after the break. The router takes quite a while to boot, but once it does it seems that the controls are both intuitive and responsive.

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Hacking Into Your Router’s Administrative Interface

June 9, 2011 by Mike Nathan 21 Comments

zte_zxdsl_router_hack

[Arto] recently upgraded his home Internet subscription from an ADSL to VDSL, and with that change received a shiny new ZTE ZXDSL 931WII modem/wireless router. Once he had it installed, he started to go about his normal routine of changing the administrator password, setting up port forwarding, and configuring the wireless security settings…or at least he tried to.

It seems that he was completely unable to access the router’s configuration panel, and after sitting on the phone with his ISP’s “support” personnel, he was informed that there was no way for him to tweak even a single setting.

Undaunted, he cracked the router open and started poking around. He quickly identified a serial port, and after putting together a simple RS232 transceiver, was able to access the router’s telnet interface. It took quite a bit of experimentation and a good handful of help from online forums, but [Arto] was eventually able to upload an older firmware image to the device which gave him the configuration tools he was looking for.

Aside from a few Ethernet timeout issues, the router is now performing to his satisfaction. However, as a final bit of salt in his wounds, he recently read that the admin panel he was originally seeking can be accessed via the router’s WAN interface using a well-known default password – frustrating and incredibly insecure, all at the same time! He says that he learned quite a few things along the way, so not all was lost.

DIY Bolt Together CNC Router

June 7, 2011 by Nick Schulze 12 Comments

Before I decided to build my own CNC machine I had seen a few bolt together machines on the internet, usually constructed using 80/20 aluminum extrusion. My write up describes my attempt at a completely DIY bolt together machine made from 25mm aluminum SHS, 50mm shelving brackets and lots and lots of gutter bolts.

Building the machine involved drilling and tapping about 400 holes (if I can still count) and assembling the machine over a 3 month period. I designed it mostly on the fly which lead to a few headaches, but in the end a machine that works quite well (if slowly and noisily). I go through each major component of the machine and describe how and why I would have changed it if I had followed the normal plan-design-build methodology.

I have tried two versions of stepper motor drivers and you can find the schematics for the DIY version on my site. The entire thing runs from a Linux PC running EMC2, check out a video after the break to see it in action and here are some photos of a few of my machined items.

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