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Wireless Door Unlock – TI Low Power Challenge

Written by admin on Aug 12th, 2010 | Filed under: Source Code Tools
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Our entry to the Texas Instruments Design MSP430 Ultra-Low Power Challenge (www.designmsp430.com). Using the new eZ430-Chronos sport development watch, we created an electronic door unlock device. It communicates wirelessly to exchange a secret password (a sequence of taps on the watch’s 3-axis accelerometer). Project detail description and source code available here ziyan.info

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28 Comments Enjoyed this post? Subscribe via RSS. Thanks for visiting!

  • CoreoBroomstick

    But will it play Doom?

  • ericparrey

    Nice. I’d like to see a voice activation option on the watch.

  • fo3ps7b88qa

    Dude. That’s freakin’ AWESOME!.
    The intuitive sequence coding looks so simple! If you were in & out a lot I can see it making your life much easier & faster.
    Great work guys.

  • Hafiz93

    I wonder what if you go out and your battery die.

  • TERRANCIO

    so, we could also use an R/C receiver and transmitter… right? lol

  • mostliberal

    Too tired after study. right… Sure it wasn’t “too drunk to handle keys”?

  • davorb

    How does the encryption work? If it’s 128-bit it’s got to be symmetrical encryption (I hope). Do you use some kind of challenge-response?

  • conrad2468

    whats the range on the radio?

  • RITmdrc

    Then you don’t get in your door? Duh?

  • RITmdrc

    Presumably because you wear your watch all the time. Hopefully (if your sequence isn’t too long), the time it takes you to get through the menu system and do the tapping is less than the time required to get out your keys and open the lock.

  • RITmdrc

    Not very secure if everyone knows your password. Alternatively, using voice fingerprinting would seem like a bit much for this microcontroller to handle.

  • strangerd4nger

    I would love to see this on the market! But I could see its malfunctioning and then being locked out. But great idea.

  • MDKBrian

    Very good idea. I like the potential, however the video doesn’t answer the main Challenge’s point: Is this a low power solution? How long will the 4 AA batteries last? Specially if these batteries are needed to power the servo. As a consumer this should be the main concern. If the batteries need to be replaced often, then this product won’t sell…

  • marine4hire

    You obviously don’t know RIT students.

  • obefab

    When i saw this watch the first time, i had the same idea. :)

    well done

  • iExD

    someone in there already?

  • pcfix411

    I dont know what comes to mind here but good video.

  • WildSeven0079

    What if you lose your watch and you’re outside of your home? o_0

  • allen2688

    not many people remember a watch there all ust to just grabbing keys watches get annoying after a while :/

  • stevieypie

    Flippin awesome but I wish you guys did a little work to improve the audio of the video.

  • ossumguywill

    @WildSeven0079 it’s less likely than losing your keys….

  • ATCRyderX

    WHAT…It can’t even spell PLEASE correctly.

  • myfuckingcookies

    Wow, such old technology. Doesn’t everyone step into a wormhole nowadays? Pffft

  • unopinionated

    acceraromerer
    had to be said

  • postyrus

    what happens when the battery/s run out in the locking mechanism?

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