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andreasdotorg's profile
andreasdotorg
andreasdotorg
andreasdotorg
@andreasdotorg

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andreasdotorg

@andreasdotorg

I'm a hacker, pretty much in the old school sense of the word. But I do know IT security too.

Joined April 2008

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    1. Travis Goodspeed‏ @travisgoodspeed 11 Dec 2017

      "But Travis," you say, "What about a disassembler? What if you're stuck in an hour-long SCRUM meeting and need to reverse engineer your watch's firmware with pen and paper to retain your own sanity?" An MSP430 disassembler is built-in, of course. 6/npic.twitter.com/Yku8DshQzf

      8 replies 67 retweets 258 likes
      Show this thread
    2. Travis Goodspeed‏ @travisgoodspeed 11 Dec 2017

      And while the GoodWatch10 was certainly the coolest hex editor watch to wear last month, things can be niftier. In this photo, it a GoodWatch20 is beaconing my #hamradio callsign to a Yaesu 817 as Morse code. 7/npic.twitter.com/q9PwqPWNrq

      5 replies 29 retweets 150 likes
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    3. Travis Goodspeed‏ @travisgoodspeed 11 Dec 2017

      This tiny green wire--the only cosmetic blemish of the watch--uses the stainless steel watchband as a random wire antenna. It's not well tuned, but it gets the job done. 8/npic.twitter.com/AVH43ghzLO

      4 replies 17 retweets 111 likes
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    4. Travis Goodspeed‏ @travisgoodspeed 11 Dec 2017

      The firmware also includes a serial debug monitor, so after flashing firmware and a codeplug of radio frequencies, you can self-test the device or send and receive packets from the air. 9/npic.twitter.com/QM9wlgtHKc

      2 replies 10 retweets 77 likes
      Show this thread
    5. Travis Goodspeed‏ @travisgoodspeed 11 Dec 2017

      The radio is based on the same CC1101 core that the GirlTech IMME used, so all the old IMME hacks are portable. My reflexive jammer for P25, Mike Ossmann's iClicker emulator, and Samy's OpenSesame can all be adapted to this platform. 10/npic.twitter.com/G2CN2xrcHJ

      6 replies 24 retweets 153 likes
      Show this thread
    6. Travis Goodspeed‏ @travisgoodspeed 11 Dec 2017

      You can't leave the receiver idly receiving in the background for power budget reasons, but otherwise the radio is fully functional. Receive and transmit, everything from CW to 4FSK. 11/npic.twitter.com/aNs89eCzi4

      6 replies 24 retweets 119 likes
      Show this thread
    7. Travis Goodspeed‏ @travisgoodspeed 11 Dec 2017

      The codeplug is compiled from a textfile and loaded into Info Flash, where it won't be accidentally overwritten by firmware updates. Writing a CHIRP plugin won't be much trouble. 12/npic.twitter.com/q4M6DBAKsP

      2 replies 7 retweets 49 likes
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    8. Travis Goodspeed‏ @travisgoodspeed 11 Dec 2017

      Firmware for the watch is written in clean C89, designed to compile with GCC on Debian/Stable with no weird third-party packages or commercial compilers. The radio features gracefully disable on watches without a 26MHz crystal. 13/npic.twitter.com/mO3Ehi2Thf

      3 replies 13 retweets 66 likes
      Show this thread
    9. Travis Goodspeed‏ @travisgoodspeed 11 Dec 2017

      Because it can be a pain to debug radio configurations in device firmware, the UART monitor provides easy Python access to all the radio functions. You can mock up a working prototype of your radio application in host-side python, then rather directly port to C. 14/npic.twitter.com/fJlih47vfa

      3 replies 7 retweets 48 likes
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    10. Travis Goodspeed‏ @travisgoodspeed 11 Dec 2017

      GoodWatch source code and CAD will be available early next month. I'll be giving away unpopulated PCBs at Shmoocon, and they fit all Casio 3208 devices, such as the CA-53W and CA-506 calculator watches. They do not fit the older Databank devices. Soldering is QFN and 0201. 15/npic.twitter.com/JMoUDmB1wA

      4 replies 12 retweets 84 likes
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      andreasdotorg‏ @andreasdotorg 11 Dec 2017
      Replying to @travisgoodspeed

      Ordering a CA-506 as we speak. Do you make it to Europe any time soon, neighbor?

      10:49 AM - 11 Dec 2017
      0 replies 0 retweets 0 likes

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