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madhak

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Everything posted by madhak

  1. Wow 12'000G forget about that! http://www.acs.psu.edu/drussell/bats/impulse.htm MEMS Gyro (The kind used in small electronic devices) can sustain 1000G max. Other than that you are looking at rocket grade Gyro and good luck finding that, well let me know if you do find one ;) I think the proper way to calculate speed and angular momentum would be using a high speed camera and mark the ball in a way you can extract reference from still frame and compare them over time.
  2. DOS Shell is not a Coding Language, its a scripting language. Learn BASH, similar to DOS but for Linux and way way more flexible/powerful The first Coding Language anyone should learn is C, because most other language use the same syntax, Java use C like syntax. When you grasp C/C++, all other language will open up easily. Java is the most difficult one to learn and most of what you will learn wont apply to other language except C# maybe, while its easy to get started, once your application get more complex you will have to learn tons of concept about memory management, override, interfaces... but it does open the mobile device APP market so its a worthy language to learn but don't get fooled by how easy it is to get started. Java book are HUGE and you likely need to grasp at least 50% of it before you can produce anything useful, that being said, 75% of the APP on the APP market are written by lazy monkey who just put a webview (instance of web browser) in their APP then do the rest of the coding in HTML5/Javascript... So learn those 2 too....
  3. You mean your car radio USB?? your radio is like a small computer, the USB port is a HOST port and probably have a limited library of USB client capability, most likely Mass-Storage and Media-Services so it can play music and video from USB key and iPod and such... What exactly are you trying to do? If you want to access car data you have to connect to the ODB2 port with an adapter (USB or Bluetooth) that will give you a serial port to your car BCM and ECU. Otherwise this USB analyzer will get you going: http://www.totalphase.com/products/beagle-usb12/ Not cheap but there's more expensive option too ;) You said you want to access the Serial com data, in the unlikely case that your radio has a Serial com port available in the USB stack you could try with 2x FTDI UART to USB module in series to a laptop, if that get detected and you can find the appropriate baud rate to talk to it, not sure what it would have to say tho... A host to host usb cable could work too...
  4. madhak

    Hacking a drone

    Very very unlikely on a large drone. small one you can buy at the store use wifi so these are easy to hack but the large one or even small hobby grade one, not the toy you buy at the store, are very difficult to crack because they all use spread specrum, encoding and pairing handshake that occur only at boot. Hobby and commercial grade drone don't use wifi, toy grade one does, there's many protocol used other than wifi: - a common one is DSSS, DSM. like bluetooth its spread spectrum on the 2.4 band so a ubertooth could be able to crack it although its not an easy task. - UHF are getting increasingly popular due to their long distance capability and opensource parts available, I personally use OpenLRSng which is kick ass btw, fully encrypted, spread spectrum. no way to easily hack that although I came up with a scheme where it would be possible to hijack handshake at boot time but that would mean the pilot would never had control and would have noticed it. - Synthesized AM, pseudo coded, spread spectrum, require a DX in the 70MHz band to do anything meaningful but it would be possible to hijack this one... Finally, regardless if a hacker can crack the communication channel, a crash would be likely and unlikely at the same time, large drone have failsafe and autopilot system, it will take over control if the com channel become erratic. small one would fall like a brick if you were to send a value out of range... My drone use custom hardware between the flight controller and receiver which mean a hacker would need to know how the data translate or he would send unrecognized command and the flight controller would enter failsafe or autopilot mode. I suspect a hacker group would target DJI flight controller as they are the most popular one on both large and small scale hobby and commercial grade platform. I have moved away from these as they are expensive and not open source and there is a conspiracy theory that they release firmware with bug to make you crash so they can sell you parts lol For a large drone with an auto pilot to fall like a brick it would require a motor or power failure, many operator doesn't know their machine well enough to diagnose early sign of failure, the guy said he never crashed in a year, most part on these drone need frequent replacement. I think the guy is simple trying to find a way to not go to jail and blame a hacker instead of taking responsibility. These thing are very dangerous and should not be flown near crowded area at all. Also lot of people assume because they have ore than 4 motor, they have redundancy which is not exactly true, it depend of your flight controler firmware and how much load you carry. Source: I'm a drone pilot since 3 years, I have 7 multirotor drone, large and small one madfpv.com fpvquebec.com basement-rc.com
  5. Samsung reveal new wifi router: http://www.samsung.com/uk/discover/mobile/launching-samsungs-fli-fy-pigeons/
  6. There's an opensource implementation of the GSM protocol: http://bb.osmocom.org/trac/ Newer protocol are still proprietary and have no opensource implementation AFAIK At the hardware level its quite simple; antennas => multiplexer => receiver => trunk => media converter => telco network...
  7. You should ask this guy, he seem to know what his talking about! https://www.youtube.com/watch?v=AnxrJiS5uKU
  8. Hum, how about DD-WRT router or in fact any router, I'm not aware of any router device that doesn't run on Linux! Pineapple is a set of tool compiled for UCLinux, a tiny linux designed for embed system. What set the pineapple apart is: - Community!!! - Relatively cheap hardware, with option you wouldn't find on most other hardware like a dip switch, proper wifi chipset for raw capture and deauth - Precompiled set of tools - Ecosystem, all these tools work well together and has a nice GUI Everything you can do with a pineapple, you can do with any machine that will allow you to SSH to it, but it will require you to hack for real, not pressing a few button! I personally use a micro ATX PC with Kali linux to do just everything the pineapple does and more, I still have a pineapple, quite useful when traveling but I use it mostly as a bridge when connecting to hotel wifi,
  9. You are right, at layer 1 all wireless communication share the same medium which it the RF spectrum.
  10. Really, how about WPA2 Enterprise with Radius, each user get a unique password so they are individually encrypted, then high end AP allow client isolation which tunnel their connection individually to the internet so they cant talk to each other...
  11. If I understand correctly you want to use the pineapple as a bridge to connect wirelessly to a wired server, is that correct? You said "The server accepts connections from 127.0.0.1" you know this mean that only connection originating from that very same server will work, if you want to be able to connect remotly, from an other machine, then it need to listen to an interface other than localhost.
  12. Oops, I reread your post and found you want to use this antenna: https://www.youtube.com/watch?v=TanbyHBKrvU That look sick, I have a bi-quad, not a yagi one but I'm impress by the gain it has, gotta try a bi-quad yagi now :)
  13. most USB Flash drives are set as 'Removable Drives' when shipped by the USB drive manufacturer which means that Windows will only access one partition on the drive. See solution here: http://www.rmprepusb.com/tutorials/multipartufd Took 20 second to find this on google...
  14. Most "Aluminium" looking brief case are actually made of plastic and wood that are painted. Thin wood and plastic wont affect your signal to much but any material will attenuate your signal to some extent. Check my Control Ground Station (CGS): http://www.basement-rc.com/forums/index.php?topic=3376.0 It has built in antenna and external antenna option. Look at your hardware store, they have tool case, or at your office supply store, brief case, almost none of them are actually made of real metal, except the corners. Very cool project by the way, what are you planning to use to control the antenna orientation, what kind of antenna are you looking for, I had good experience with patch and parabolic antenne for WiFi but nothing that can fit in a brief case, I used an old 36" tv parabolic dish to pickup wifi signal 2 mile away hehe, but smaller dish or patch are not as strong but I was able to get WiFi from the store across the street.
  15. Go for RED or BLACK WD HDD line,BLUE and GREEN have cheaper bearing and make noise and don't last as long (2.5year in average from my experience)... BLUE and GREEN are a waste of money (and potentially data), especially that you seem to be able to afford the better line. If you can source them (I couldnt) go for the PRO line of Samsung SSD, the EVO series REQUIRE the use of their magician software or they don't run as well from my experience. I personnaly prefer the OCZ Vertex4 but they are hard to find localy nowaday...
  16. You could also try Slitaz or Puppy Linux, I can run these on a 12year old Dell inspiron laptop, It amase me that this laptop still work, I'll sell it to a museum in a coupple of year lol
  17. Hey that remind me of my old ducky, I used a small hub too with a naked flash drive and a teensy: http://madhak.com/?p=41 I was using VBS too, the ducky would just locate the mass storage and run a more complex task from there
  18. There's many way to do that, but it require some tools like a RF Power Meter and an RF Attenuator. Don't rely on the wifi signal strength because its a composite of many variable and doesn't tell the full story. A WiSpy device could help as it will provide the raw IQ you need to evaluate the signal strength. the Attenuator will allow you to test on smaller scale so you don't have to walk long distance to reach the end of signal. The radiation pattern will depend on the type of antenna you build, so google "the type of antenna you build" and radiation pattern, and you will find that it look like. i.e: whip, dipole, turnstile, patch, yagi, dish... If you really need to measure the radiation pattern then you need a special RF proof room with an array of power meter, you can rent those kind of room but its not cheap! of try to find a place with the least amount of RF interference, but these are rare nowaday, if your cellphone as signal its likely that its not a good place to test!
  19. Read your ISP contract, its not legit to do so and they will blackhole your traffic... They have automated way of doing that.
  20. If you go back to the original USB Ruber ducky, the one using the teensy then you could write yourself a code that does it, my blog contain an old archive: http://madhak.com/?p=74, check the PDE attached on that blog post and instead of using the keyboard lib use the mouse one. then you can use .click() and .move() function to simulate every possible swipe. But keep in mind that there's security software that will send a picture and the location of anyone failing 3 attempt... Or you could look at the grease trail left on the screen, it usually reveal the pattern :P If its not easily visible try with baby powder... I use this technique a lot to prank friends, I usually get the pattern on 1st try.
  21. Yes its purely for hobby, I looked at the regulation and in Canada its a PITA to get a commercial licence, not worth the trouble IMO Those box are going at friends place in habitation tower on the rooftop, It has a 12v power in on the side and an internal batteries that last about 30min in case of power failiure. Legality well as a hobby its absolutely legal BUT if I put people at risk or spy on them than other laws apply, like public endangerment, privacy invasion to name just a few... But flying drone IS legal in north america! RF band is an issue too, the 2 legal ISM band (2.4 and 5.8GHz) provide max 1km of range, I use HAM band, these provide tens of KM (432 and 910MHz) but I make sure I don't interfere with anybody prior to my flight. If I lose connection well, on my most expensive rig I have an auto pilot with return to home, for the cheaper/smaller one well it crash or keep going... I have a set of tools to help me find it back, I lost a few of them, always got them back, not always in one piece tho. I also set the failsafe depending on my flight plan, if I plan to go very high, my failsafe should lower throttle when signal is lost, if flying very low it is set to increase throttle when signal is lost, so I have a better chance to catch it back, if I were to set throttle to increase uppon lost and going very high, this could happen heehehehe http://www.youtube.com/watch?v=6c41LUKdIlI Thanks :)
  22. For satelite you will need circular polarized antenna, see this useful resource: http://sv1bsx.50webs.com/antenna-pol/polarization.html
  23. I present my new masterpeice, its not a pineaple, not a wifi pineaple either but it does look like a pineaple! Why MK8? well read further… It has 8 radio! 4 SDR, 2 RF Transceiver/Modem and 2 WiFi BG and N… The connectors alone are more expensive than the SDR… Lots of connector and high quality coax. There also a HamItUp upverter hooked to one of the SDR so I can receive MF and HF band. At its core, a Mini ATX running a dual core atom N510 with 4GB of RAM. Behind the Mini-ATX lies 2x 16GB SSD in RAID 1 and its running KALI Linux, yeah man! The plan is to make 4 more of these and put them at the 4 corners of Montreal island (Canada) and one at my place in the center. This will allow triangulation of various signal… I fly Drones a lot and this tool will help me evaluate the RF condition and possible presence of other drone operator in the area as well as tracking real airplane and local authority to avoid potential issue while flying my multirotors. Eventually I want to add Video and Control relay capability to these to extend my range, but I have an other solution for that for now…
  24. Thanks for the comments guys, @Telot & Pimmpinit; hahaha, I hear you! I need to find an DXer Anonymous program soon... I haven’t been very active here lately, working on a crazy big motorised antenna, If you guys like antennas check out my new project: Large Antenna Tracker
  25. Thanks for the comment, yes dx.com is legit, I've bought over 6000$ from them last year and out of that maybe 20$ worth of stuff came broken, I don't bother returning defective item, its a PITA... you get what you pay for and shipping is slow (about 1 month on average with express shipping) but its definitely a good source for cheap electronic and gadget. A friend of mine had a different experience but he was using credit card and they fuckup on payment processing took him a month to sort it out before they finally ship... I use paypal all the time and never had an issue with them and item ship as advertised (~7day from payment date) 3 Week shipping with EMS express, never tried slower standard free shipping but I read it can take from 2 to 3 month...
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