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Everything posted by madhak

  1. lol, sorry about that read too fast, just going trought tons unread post since my last visit try this command: modprobe usb-storage did you tried booting with the key in? also try reformatting the key, I know it should detect it regardless of formatting but sometime that help on some usb key
  2. Every BIOS is different, its usually in the advanced tab, google is your friend: "how to enable usb legacy support in bios" will get you going, if it doesn't work add your bios version to the querry.
  3. Try to set your BIOS usb mode to legacy
  4. Hi again, About the antenna separation distance well the further they are the better but its really just a matter of how precisely you can calculate the angle, for example, our eye are capable of evaluating the distance of anything at lest than 100m yet they are spaced less than 10mm, everything further are difficult to assess the distance, if you increase the separation distance you can calculate further distance. Regarding 3D map, I plan to use google map, most of the building in Montreal are mapped in 3D but for my application i'm only interested in the 2D plot. Cables is the biggest killer here, keep them short, put the receiver unit as close as possible to the antenna and run USB cable instead of Coax... I usually put a 10" patch from the antenna to the RX or DX then I run longer cable from the processed signal to the computer. I like this one: http://www.dpcav.com/xcart/SMA-to-SMA-Patch-Cable-Semi-Rigid-RG-402-Coax.html Regarding my own project well it started with this, cost me about 2K... http://madhak.com/?p=499 I abandoned the project after testing the 1st units I was getting good result but its very complicated, bulky, heavy and expensive so I went an other route http://madhak.com/?p=931 This one cost about 500$ and I can make 4 for the price of a tracker. My main goal is to plot a heat-map of the RF spectrum across different band and time to find path where I can maximize the operation of drone. I found that my range vary greatly depending of the location an time of day so with this tool i'll be able to plan my path in order to maximize the RF range while staying at low energy RF, I do have huge booster that can go hundred of kilometer but I have a feeling that the CRTC (Canadian equivalent of FCC) will be knocking at my door soon, so staying at 100mW is my goal, to do that I need distributed relay and RF site survey.
  5. One of the tool I mentionned decrypt the .jar .APK =>APKTool => DEX2JAR => jd_gui(JAR Decrypt) => SRC I've done it a few time, at first I was frustrated the .xml file in the src tree would not decrypt but In was doing it wrong ;)
  6. Hi, using the drone batterie would introduce a lot of electrical noise in the Pineapple and the SDR which is really bad for RF application. Since drone flight time is pretty limited, pretty mutch any battery size will do, look for a Lipo 3S 300mAh~1000mAh http://www.hobbyking.com/hobbyking/store/uh_listCategoriesAndProducts.asp?idCategory=86&LiPoConfig=3&sortlist=&CatSortOrder=desc
  7. Android APP can easily be decompiled, modified and recompiled, although it wont be seen as a trusted app but you can disable the trusted app check, not sure about the other platform... not an iFan and I ditched blackberry before the APP revolution... For android, you need those tools: - apktool - dex2jar - jd-gui You will find the instruction as you search for those term... You can also interact with most APP from your own APP, in android each screen is called an activity, you can call other app activity from your app and get them to return you some data but as for modifying existing app you can also override their code base too by creating an @override class of the same name as the class of the APP you want to modify... check the tutorial on android, not that hard and really worthwile today...https://developer.android.com/training/basics/firstapp/index.html?hl=it I guess other platform are similar since they all use Java but I never needed to work on these yet.
  8. Yep. that's why I have implemented WPA2 with Radius auth for my Hotspot AP... I was getting a lot of complain about user not being able to login while our system said they were loged in and being charged for... Now they login to WPA2 as guest, purchase internet access using encrypted channel, then the portal send a WISPr message to the device which contain their personal WPA2 credential,... please hack that guy, you are the reason I have a job lol ;)
  9. Hehe, good one Sebkinne, I just found how you knew yet didn't watched lol
  10. Here's the test flight of a miniature Predator Drone, very impressive! https://www.youtube.com/watch?v=I8s2J4CMQYw
  11. LOL, my advise, NEVER use IE hehehe
  12. Hi Swaggie, that's an interesting link you got there. Sorry if I kept insisting about the Dual WiFi antenna setup, I assumed you focused on the end result more than the learning experiment itself... If you want to learn RF please do, its a fascinating world but I feel you still have a lot to learn before tackling such project. First you have to understand how radio frequency work, a good analogy I like to use is water wave, RF are essentially wave so once you understand that concept you will be able to visualize the type of antenna you need. the way a parabolic antenna work can be easily visualized in a pool, then you hit the water, it will make wave, when wave hit the curved side of the pool they will bounce and the wave will converge at a specific point, at the convergence point the wave will be higher then anywhere else, that's what parabolic antenna do, they take a faint wave and focus it in a narrow point so its easier to extract the information the wave contain because it stand out more than the background noise, which can be visualized as all the little random wave that wander around the pool... So essentially you want to have a dish as big as possible to capture as much of faint signal as possible, larger the better. The reason grid antenna work is because radio frequency have much larger wave length than visible light, while visible light can pass trough the space between the grid, RF frequency cant and as far as they are concerned its a solid surface as long as the spacing between the mesh is inferior than the wave length. Wavelength; the lower the frequency, the longer the wavelength, this is also why a FM Radio antenna is much longer than a WiFi antenna. wavelength is the distance between each peak of the wave, you can only carry information on those peak so the more peak you have the more bandwidth you have, higher frequency = more bandwidth = more information. So for each different frequency you will want to monitor you will need a different antenna, if you go to higher frequency like 5.8GHz and above your dish reflector will need to be more opaque, because your are getting closer to visible light, for example a satelite TV dish is solid, because it work at 20GHz, if it was a grid the hole would need to be very small, the only reason they use grid antenna when possible is because if has better resistance to wind. You can use a 20GHz parabolic dish to capture lower frequency but not the inverse. Now about distance, there's no such thing as a distance in RF, only dB, because the distance will depend on the transmitting power, attenuation (mountain, building, fresnel), background noise (interference). In the best case scenario, distance is equal to the square root of the ERP (effective radiated power) which is a composite of power and gain, that's why its much easier to talk in dB where for every 3 dB you double the distance... But again, that distance is relative here, not absolute so we cant talk in meter, just in dB... dBi are different than dB, dB is how strong the signal is, dBi is how much the signal is focused... Note that strong (dB) is not equal to loud (W), W make it loud, but just because you turn the volume up doesn't always mean you will hear better, just like speakerphone doesn't make the conversation better, even sometime worst, that's why booster are not so effective. I could probably go on forever and end up writing a book lol but here's a few link to get you going; First, study the HAM resources: http://www.qsl.net/aa0ni/toc.html Also, understand the spectrum: http://en.wikipedia.org/wiki/Electromagnetic_spectrum Then antenna theory: http://www.antenna-theory.com/ More RF stuff: https://www.youtube.com/results?search_query=how+radio+wave+work Understand what is a Photon: https://www.youtube.com/watch?v=aAcDM2ypBfE After that maybe a bit of quantum physic, at least the basic stuff, what is a field, photon, electron, youtube have a lot of visual explanation If you have any specific question I will be happy to help you.
  13. The reason the quadrifilar work so well with satellite is because of the polarization, non geosynchronous satellite rotate on themselves in space, if you have a linearly polarized antenna, like ALL wifi antenna then you get 100% polarization match 1/4 of the time, and 50 % 1/2 of the time and 0% 1/4 of the time. Also this effectively mitigate multipath problem as the reflected signal reflected from a mountain will arrive out of phase but also out of polarization, so it negative effect will be lowered. To efficiently communicate with satellite, circular polarization is required, but if you listen to a wifi signal with a circularly polarized antenna then the same limitation apply as above so you wont get good signal http://sv1bsx.50webs.com/antenna-pol/polarization.html http://en.wikipedia.org/wiki/Circular_polarization
  14. - Any parabolic shaped metalic structure with gap between element less than 1cm will work, bigger overall shape the better, make it a 25m large dish and reach the moon, literally - Down-converter use active component in the process, they always require some sort of power, for MMDS they get their power from the receiver STB unit when normally used for digital TV - Servo, hum what to say, you don't really need a tutorial on that, with a USB servo driver you just have to tell the position that the servo should move to the desired position, a 180 degree servo will be at 0 degree with value of 0 and 180 degree with value of 1024... How they work doesn't mater, lest assume its magic for now. - Regarding bandwidth well a downconverter will not loose information, its just the carrier that change so instead of having your signal traveling a 2.4GHz carrier it travel a 900mhz carrier, however to represent the same information on a 900mhz carrier you need more bandwidth so a 20MHz bandwidth on a 2.4GHz carrier will take about 60MHz on a 900MHz carrier. The biggest problem is the SDR that is capable of tuning to only 2.5MHz of bandwitdh at a time, but thats enought to grab a mac address of the header of a frame but not a full frame. Again if your goal is truly to sniff WiFi devices then a dual WiFi radio with directional antenna is WAY WAY WAY more simpler and cheaper...
  15. Oh my oh my oh my, please review the solar cooker link you provided, if that price was for an actual solar cooker I would order 100 of them and make a solar death ray or something, but please reread the description carefully and if you decide to order it then please post a picture of your face when you receive it. No mean to be disrespectful here ;) Also, if it was a solar cooker, it would work only if its made of metal, and from the look of it it look like mirror which work for visible light only... Here's a link for the power injector, note that they also have downconverter on this site, this may be a better alternative to the MMDS one as this one will allow you to connect your own antenna. http://www.winradio.com/home/bt-3500.htm I don't think there's a cheap route for this project unless you find the dish with the down-converter in the garbage and extract the power injector circuit from a receiver unit that was used with those antenna... sorry ham stuff is expensive, only the SDR is not ;)
  16. What version of Win8 you got, If its RT your screw... if its Pro there's hope, well hope of getting rid of it but as for dual boot I think MS made a secure boot loader so you will need to have it installed on his own disk and lunch the w8 bootloader trough grub bootloader located on the other disk... On my part I formated it and installed ubuntu :) Not touching w8 with a 10" pole... I'm not providing support other than removing it ;)
  17. Cooper is right, but if you focus on WiFi only then you only need 2 of those antenna you listed, I tried them before, they are good for the price, quite directionnal, they are not real dish tho, just a patch that look like a dish but it will work. If your focus is on RF in general in the 2.4 band then cooper setup sugestion will work, those grid dish with the downconverter are kick ass, I could get wifi signal several miles away with that! But you are missing a Power injector for the downconverter, these dont work just like that... In both case you are still missing the rotary part, you will need a couple of cheap hobby grade servo of your choice ~10$, if you only want to triangulate in 2D you nee one per antenna otherwise 2 per antenna. and a servo controler like a pololu: http://www.pololu.com/product/207 Then we'll get to the software part, I'm actualy working on something similar if you couldnt tell ;) I highly sugest Python as the software framework, there's triangulation library as well as IQ sampling lib for SDR and servo operation so its almost all there, just need some code stitching and a GUI :)
  18. Cooper you forgot to take in consideration the HDD price per GB when GSM was drafted in the early 90's ;) Swaggie for your last question you are right and I meant to say that in my original response, you have to make up a meaning from those reading, for that you need to get a device identifier that relate to the signal strength you are reading. For Wifi its easy, they broadcast a SSID openly and most of the time their MAC address too so you can identify those device you are reading and map them. For GSM you will get their IMEI, which is the equivalent of a MAC address for cellular devices, but only after decrypting the frame... GSM is used as fallback or in remote locations, most people are on 3G or better, a false belief is that GSM carry phone call and 3G data, they can both carry both... But you could jam the 3G frequency to force a phone to go to GSM but again you can't do that legally in most country and i'm damn sure they can triangulate the source of a jammer ;) Your phone is always in one mode, 3G+ or GSM but not both, your phone will drain a lot more battery in GSM and will show a GSM icon instead of a 3G or LTE... Back to main topic: Triangulating RADIO signal to be generic, there's 2 layout possible: - 2 RX antenna with steerable beam, you could use 2 directional antenna or 2 phased array (the beam forming one), but the math i'm talking about after will not be pleasant in the later case. - 3 RX antenna at different location around the target You need in both case to take consideration of the radiation pattern of each antenna, because they all receive signal from different direction, but at different amplitude (or signal strength but thats overly simplifying here) http://www.cisco.com/c/en/us/products/collateral/wireless/aironet-antennas-accessories/prod_white_paper0900aecd806a1a3e.html To find a SDR you need to know the the frequency's range you need to listen to, wifi is 2.4GHz, I dont know of a cheap (but many expensive) SDR that can do that but you could use a down-converter like those used on old digital TV grid antenna, look on your roof, you might have one if you had the 1st gen digital TV, before HD and stuff but not via satellite, its a grid pointed to a mountain or a tall building, you can safely remove that if you see that on your house, its golden for SDR'er, it take 2.4GHz and downconvert it to 900MHz which a cheap SDR like the one in the shop here can pickup :D Aww snap we haven't even got to the triangulating part and its getting late... but look, its all maths from here... and i'll be back for you if you don't run away from this :)
  19. Are you using the supplied antenna or one from the shop? some antenna you can buy online have SMA connector while FCC approved WiFi devices use RP-SMA connector specifically to prevent you from connecting an high gain antenna. Check the little pin inside both connector, one of the 2 (antenna or AP) should have a pin and the other a hole, if they both have a hole then barely no signal will go trough.
  20. But as for cell phone its more difficult because its encrypted so all you will see is a cloud of noise coming from many sources, you can't filter those source without decryption which require a 2TB rainbow table and Kraken, see this thread and don't ask this stuff here, nobody want to have their IP address listed at the pentagon ;) Decryption of RF signal is ILLEGAL! http://www.insinuator.net/2012/10/pytacle-alpha1-released/
  21. Triangulation is about triangle, not about three of something, you only need to know 2 angle to figure the 3rd angle of a triangle... A 3 antenna setup will have you focus on the distance to each 3 while a 2 antenna setup will require you to calculate the distance AND angle of both, both setup is doable, it depend whether you can place a 3rd antenna BEHIND the object you want to triangulate while 2 sweeping directional antenna doesn't require one behind target... GPS work with 3 (and more) antenna (satelite) because it cant have a directional panel focused on each and every GPS users Our eyes work with 2 and can figure the 3D spacial position of an object with only 2 reference Yeah visible light is radio wave, so most of what apply to RF also apply to Light because they are essentially the same thing our eyes are highly specialized antenna array (retina) with special focus-able diffracting material (Pupil) and a shutter, how beautiful is that! so we are all triangulating every second of our life with 2 receiver...
  22. I managed to modify content passing by a router using squid + dansguardian squid does the transparent proxying so client dont need to setup their browser for the proxy. it then pass the traffic to dansguardian Dansguardian have several regular expression handler you can use to modify, content, get, post, header... everything...
  23. Maybe the plug is a RJ45 but that doesnt garantee that its using Ethernet... If wireshark doesnt see anything then it might not be using Ethernet but maybe RS424 232 485.. the later one is comonly used in control system over coper twisted pair and UTP cable being cheaper than control STP it could be it... Otherwise check your wireshark setup are you able to sniff other network, maybe you ned to reinstall winpcap...
  24. Look like you need to start with Arduino, its C syntax and after you are good with it you can move to C/C++ AVOID: VB and C# as wou will be forever stuck with microsuck.... yeah I know about wine and mono but that's terribly slow and inconsistent IMO Start by setting yourself a goal: I.e. I want to blink a led if a button is pressed. Then write pseudo code in your own mental language if button is pressed then if light is on then set light off elseif light is off then set light on wait a bit (flashing delay) then move on, now you want that led to toogle blinking when pressed, so create a variable to store button state variable buttonstate if button is pressed then if button state is on then set buttonstate off elseif buttonstate is off then set buttonstate on then you can decide if your led blink with buttonstate if buttonstate is on then if light is on then set light off elseif light is off then set light on wait a bit (flashing delay) If you cant think like that then take the blue pill and go read a novel, otherwise take the red pill and download Arduino :) Oh wait, nobody read novel nowaday, so replace that by go watch history channel ancient alien
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