Tag Archives: wardriving

Highly Portable Wardriving, Warcycling, and Warwalking Setup Update

Before I left on a trip this past week, I was able to shoehorn all the components (GPS receiver w/integrated antenna, dual-band Wi-Fi module with external antenna input, 4-port USB hub, TTL to serial to USB adapters) into a single plastic case. It’s not yet weatherproof, but at least it’s splash- and rain-resistant.

Img_4058-1

The original cable on the USB hub was only a meter, so I grabbed a 2 m cable from the box, whacked off the end, and replaced the shorter cable.

I used double-sticky foam squares to create an electronics sandwich, with the GPS antenna at the “top” of the stack, the Wi-Fi below, and the USB hub at the bottom. The cable passes through a silicone-sealed hole in the case, and I removed the SMA-RP female from the Wi-Fi dongle and replaced it with a short RG178 cable and bulkhead SMA-RP connector that pokes through the top of the case.

Img_4060-1

As one can see, the box is a cheap one from Radio Shack or similar, it’s some kind of ABS. The box’s lid, which would usually be on the top, is now the bottom of the assembly. I silicone-glued 3 NdFeB rectangular magnets to the inside of the lid, and put 4 rubber-bumper feet to reduce any potential surface marring. Next, I took the thing out for a drive on a local freeway to see if it’d blow off. It did. I adjusted things a bit by getting rid of the rubber bumper feet, and replacing them with electrical tape on the outside of the lid for more of an anti-skid, compliant surface than the bare plastic alone. The next drive, and subsequent ones this week, proved that the widget is now fairly stable even at “high” highway speeds. I thought about painting it white to reduce heat absorption, but that would make it have higher visibility and I’d prefer to stay low profile.

In taking it for a drive or two around the neighborhood, it matches my mobile setup almost exactly in reception, and takes all of 30 seconds to deploy when getting a rental car.

I’m wondering if I can somehow add a temperature sensor inside and read it via the USB. But that’s not so important.

Winbook TW700 and Warwalking / Wardriving

This is an amazing little gadget. And an amazing bargain if you play your cards right. The Winbook TW700 has been out for a while, and I learned about it only recently through an APRS reflector post from WA8LMF TW700 Review.

It is a simple Windows 8.1 machine, available only at MicroCenter, and there’s no MicroCenters here in Arizona. However, fortunately I have been traveling to Chicagoland on occasion and there are a couple of MicroCenters there.

Searching the MicroCenter website for pricing on the TW700, it ranges from about $44 to $80, depending on whether it’s new, open box/returned, or bare units without the accessories. And stores only have whatever is available in their store, so you might walk in and find that only new units are available, or they might have a number of open boxes, etc. I was very fortunate to get one at a good price, open box, and I didn’t need the few cables and charger that the new ones come with.

Like I said, these are extremely simple Windows 8.1 tablets, and quite tight on expansion. The one that I picked up had a 32 GB microSD card installed, which has turned out to be quite handy. Also, there’s only 16 GB of permanent storage in the machine, so Windows 8.1 takes up about 6 of that, and there’s about 8 GB in a restore partition. So there’s very little extra storage in the inboard “drive”. There’s also only 1 GB of RAM, and that can be tight unless you have low expectations. The Atom processor is plenty fast, and the screen bright and easily readable. The whole thing can run off its internal battery for hours at a time (maybe 4?).

Through WA8LMF’s and others’ web postings, I was able to increase slightly the available storage on the inboard drive even after the zillions of 8.1 updates that ballooned the size of the base Windows configuration. I have about 2 GB of inboard drive storage available now, which is plenty for my applications.

Speaking of applications, the main reason I got this was that I’m into wardriving using Vistumbler and WiFiDB, excellent tools written and supported by Andrew Calcutt and Phil Ferland. For a while, when working or visiting somewhere without my truck and its built-in Vistumbler wardriving setup, I had to make do with a notebook PC and its built-in dual-band Wi-Fi, and my Garmin GPS jacked in to the PC USB port. Was very bulky, and difficult to observe the results in real-time.

The TW700 changed all that. I also got a $10 USB hub (the TW700 has one regular USB port), a GPS receiver board from Sparkfun, and a very inexpensive TPLink dual-band Wi-Fi USB dongle. Borrowing a better dual-band antenna from the junkbox, I now have a pretty competent pedestrian/mobile warwalking/wardriving setup.

Img_3946_small

This is an incredible little warwalking setup. I’ve even rode the bicycle around with this in the backpack, and it is really a nice performer. I taped the TPLink dongle / dual-band antenna to the top of the truck, across from my big Cisco dual-band antenna feeding the truck’s wardriving setup, and got essentially the same results while driving the neighborhood. Excellent sensitivity and lots of access points. The TW700 runs smoothly and supplies enough power to run both the GPS and the Wi-Fi dongle, so I didn’t have to bring along an extra battery to run the hub.

I still have to package the TPLink dongle, GPS and the USB hub together in a single package, so that there’s only the USB cable to the TW700.

You can read more about wardriving, Vistumbler, and the WiFiDB at the techidiots forum.