Hacking The Green Goose For Fun And Profit

March 19, 2012 by Adam Munich 8 Comments

[Troy] recently got his hands on a greengoose starter kit and like any HAD reader would do, proceeded to probe it mercilessly.

The greengoose appears to be some sort of location-tracking device which reports back to a server on the position and location of radio transmitters relative to it. [Troy] managed to not only get the base-station’s firmware, but to also hack it and greengoose’s data to his own server. As if that wasn’t good enough he broke down the packet structure for us. Good job [Troy].

Looks like the greengoose could be a fun tool for anyone interested tweeting the whereabouts of their cat, or checking if the toilet seat lid is down. Let’s see what people come up with.

There’s A Lot Packed Into This BeagleBoard Controlled Rover

November 14, 2011 by Mike Szczys 7 Comments

That black box is hiding all kinds of goodies that make this rover a hacking playground. [Andrey] built the device around a BeagleBoard, which offers the processing power and modules that he needed to make the rest of it work.

The control unit shrinks the pilot down to the rover’s size, using a cockpit that has a steering wheel and other controls, and a monitor playing the stream from the camera on the front of the bot. It has a WiFi adapter which allows control via the Internet. The camera, which can be rotated thanks to its servo mounting, feeds the video to the BeagleBoard where it is compressed using the h264 codec (more about that and the cockpit here) to lighten the streaming load. You’ll also find an ultrasonic rangefinder on the front for obstacle avoidance, and a magnetic compass for orientation information. Finally, a GPS bolsters that data, allowing you to plot your adventures on the map.

It’s great, but it will cost you. Material estimates are North of five hundred Euros!

Taking GPS Where No Man Has Gone Before

November 14, 2011 by Brian Benchoff 24 Comments

[Willem] has a friend that wanted to take a GPS datalogger up an unclimbed mountain the wilds of Kyrgyzstan. The GPS logger built for the expedition made it to the summit of Eggmendueluek, but it didn’t work the whole way up. Since the logger came back to London, [Willem] was able to do a complete teardown and failure analysis.

The data logger was built around a Jeenode with a GPS unit and MicroSD card reader added on. A few breakout boards were made and two of these bad boys were ensconced in water and dust proof enclosures. Powered by four AA batteries, the data loggers were able to handle the rigorous testing of being thrown down a staircase and also the harsh temperatures of London. Things changed in the wilds of Kyrgyzstan, though.

The data retrieved from the mountaineering expedition wasn’t the greatest – a few wires came loose after being thrown into the back of a Russian truck and jostled around. The AA batteries only powered the data loggers for three days, compared to the 12 day battery life in London. There are a few improvements needed for the next trip – some thermal insulation and not using solid core wire – but not that [Willem] has figured out the bugs he’s ready for his friend’s next expedition.

Hacked Parking Disc Can Be Controlled Remotely

October 27, 2011 by Mike Nathan 30 Comments

reverse_engineering_parking_disc

If you have ever traveled around Europe, you are likely familiar with parking discs. Required in many countries that would rather not deal with parking meters, these devices are placed in the front of a car’s window, and indicate when the vehicle was parked. When parking enforcement officers come through the area, it makes quick work of identifying which cars need to be ticketed.

[Michael] received a fancy electronic parking disc as a gift, but the device was incredibly buggy, causing him all sorts of grief. After contacting the manufacturer and receiving no helpful response, he took it upon himself to get things working properly.

He dismantled the disc and found that like many products today, the microprocessors were locked down behind a layer of hard resin. Undeterred, he decided to rebuild it from the ground up using an ATmega microcontroller to provide basic parking disc functionality. He also armed his disc with a GSM modem and a GPS receiver – the former gives him the ability to communicate with the device, while the latter provides accurate time data while allowing him to keep tabs on the car’s location, should the need arise.

The hacked disc’s guts reside in his glove box, and can be controlled using his iPhone, making it easy to tweak his parking time at will.

Check out the video below to see his parking clock in action, and if you have questions on any part of the build, [Michael] says he’s more than happy to fill in any missing details.

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All About The Google Autonomous Vehicle Project

October 23, 2011 by Jeremy Cook 32 Comments

There have been many self-driving cars made with different levels of success, but probably the most well-known project is the Google car. What you may not have heard of, though is the autonomous Google cart, or golf cart to be exact. The first video after the break explains the motivation behind the cart and the autonomous vehicle project. As with another autonomous vehicle we’ve featured before, they didn’t forget to include an E-stop button (at 1:03)!

In the second video (also after the break) Google’s Sebastian Thrun and Chris Urmson get into more of the details of how Google’s more famous autonomous Prius vehicles work and their travels around different towns in California. A safety driver is still used at this point, but the sensor package includes a roof-mounted 64-beam laser sensor, wheel encoder, radars, and a GPS sensor. With Google’s vast resources as well as their work with Streetview and Google maps, it’ll be interesting to see what comes of this technology. I, for one, welcome our new robotic overlords.

Continue reading “All About The Google Autonomous Vehicle Project” →

Hacking SPOT Personal Satellite Tracker To Pass More Information

October 1, 2011 by Mike Szczys 38 Comments

For less than $100 you can buy a little tracking module that will upload your location to a satellite. But you’ll only get latitude and longitude information. [Natrium42] spent some time reverse engineering the hardware, and the communications protocol, to allow custom data to be transferred using a SPOT module.

The flat fee for the hardware includes a one-year service plan allowing you to tack your device on the SPOT website. [Natrium42] started poking around in the transmitted data packages, and figured he could push custom messages like altitude data if he had some way to encode it as a valid latitude/longitude package. He found that location data is transmitted as two sets of three bytes each. The four least significant bits of each set get rounded by the server, leaving a total of 40 usable bits between the two data sets. He wrote encoding and decoding functions that will allow you to transfer whatever information you want.

So what is this good for? To get the process working he removed the MSP430 microcontroller from the board and is using his own replacement. So you can transmit GPS data from the onboard module, your own module, or sensor data for anything you’re able to hook up the to the replacement uC.

Make Your Own GPS Receiver!

October 1, 2011 by Jeremy Cook 40 Comments

GPS receivers may be available for well under $100 these days, but what’s the fun in buying one when you can build it yourself? According to [Andrew], the creator of this device, he was inspired by Matjaž Vidmar who developed a GPS receiver from scratch over 20 years ago. His article can be found here and includes some nicely hand-drawn diagrams as well as a lot of theory.

However, [Andrew’s] article is a bit more up-to-date and features plenty of theory itself. He explains how he built his four-channel GPS receiver, able to track four satellites at the same time. This is the minimum number of satellites needed to track your position using such a device.

GPS technology is quite incredible, and the amount of soldering as well as the understanding of the theory behind it required to build such a device is astonishing. Interestingly (sadly?), it seems we are beyond the time of LORAN hacks, but if you have an old one to share, be sure to send it in! For something a bit easier, maybe one could try making a GPS “cateye” to track what your pet does all day!