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Thread: Remote GSM control

  1. #1
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    Remote GSM control

    Heya,

    I looked but wasn't able to find much on this topic. I am interested in controlling a number of things on my car remotely using my cell phone. There are many instances in which this has been done to start the car remotely, using a prepaid cell phone and such. This is exactly what I want, except for it to be able to control multiple functions.

    There is a device over at gsm-auto.com which does exactly this, but it only has two relays. It includes security, etc., but again, only two devices. Can anyone thing of a way to mimick this device, but for many different relays? I.e. call the number, press 1 to start the car, press 2 to unlock it, press 3 to initiate auto destruct sequence etc..

    Does this make sense? This can be easily done with a FOB, but with a cell phone I feel like it would be trickier. Has anyone done anything like this?

    Thanks

    IHateMayonnaise

  2. #2
    FLAC
    Join Date
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    Check out my worklog. My setup is probably way overkill though. The link is in my signature.
    My Nearly Complete Car:
    http://www.mp3car.com/vbulletin/show...ed-car-pc.html

    Micro Control Center... Control Your Car Across the Internet
    http://www.mp3car.com/fusion-brain/1...-internet.html

    Website: (It's a work in progress, really. All my projects have taken me from ever really developing it.)
    http://paulfurtado.com/

  3. #3
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    Thanks for the reply. I only skimmed, but I didn't see anything relating to remote GSM stuff. Where is it?

    I found this site:http://www.serasidis.gr/circuits/sms...controller.htm, where someone did pretty much exactly what I am looking to do, although their instructions are not all that intuitive.

    I went ahead and bought an AVR programmer, cause i wanted to get into this stuff eventually. Are there any other websites like this one that offer more...instructive instructions?

  4. #4
    FLAC
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    In my setup, I have a sheeva plug which is always on and always connected to the internet. A server in my house has a program I wrote on it which is always logged into AIM. I text the AIM screenname and the server forwards the command to the car across the internet.

    If you don't already have a sheeva plug in the car though, it's really not worth it to buy it for such a limited use.

    Even though, it may end up coming out cheaper than an AVR gsm development board.
    My Nearly Complete Car:
    http://www.mp3car.com/vbulletin/show...ed-car-pc.html

    Micro Control Center... Control Your Car Across the Internet
    http://www.mp3car.com/fusion-brain/1...-internet.html

    Website: (It's a work in progress, really. All my projects have taken me from ever really developing it.)
    http://paulfurtado.com/

  5. #5
    FLAC
    Join Date
    Jan 2008
    Location
    Dartmouth, MA
    Posts
    916
    My Nearly Complete Car:
    http://www.mp3car.com/vbulletin/show...ed-car-pc.html

    Micro Control Center... Control Your Car Across the Internet
    http://www.mp3car.com/fusion-brain/1...-internet.html

    Website: (It's a work in progress, really. All my projects have taken me from ever really developing it.)
    http://paulfurtado.com/

  6. #6
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    Quote Originally Posted by PaulF View Post
    In my setup, I have a sheeva plug which is always on and always connected to the internet. A server in my house has a program I wrote on it which is always logged into AIM. I text the AIM screenname and the server forwards the command to the car across the internet.

    If you don't already have a sheeva plug in the car though, it's really not worth it to buy it for such a limited use.

    Even though, it may end up coming out cheaper than an AVR gsm development board.
    Well the AVR controller was just 22 bucks from adafruit, and the board itself should cost like 3 bucks. Yeah I saw that article..he doesn't fill in many details though

  7. #7
    FLAC
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    That article does give you a full schematic and the source code. You can definitely make that work.
    My Nearly Complete Car:
    http://www.mp3car.com/vbulletin/show...ed-car-pc.html

    Micro Control Center... Control Your Car Across the Internet
    http://www.mp3car.com/fusion-brain/1...-internet.html

    Website: (It's a work in progress, really. All my projects have taken me from ever really developing it.)
    http://paulfurtado.com/

  8. #8
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    Quote Originally Posted by PaulF View Post
    That article does give you a full schematic and the source code. You can definitely make that work.
    My question is how he picked the data connections on the phone. I don't plan on using the same phone, how can I tell?

  9. #9
    Low Bitrate majasticmoose's Avatar
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    A simpler idea. A DTMF decoder. What it does is every number on the dial pad a has corresponding tone (a DMTF tone) the tells the tower where to place your calls. So once you call "your car". The output of your phone in your car will be hooked up to a DMTF decoder. after the car "picks up". Any number you press will play a tone make the DMTF decoder trigger a relay which could start a car, unlock it, etc. It's very simple. ( and it sounds like what you are describing).

    http://jpl995.com/DTMF-DECODER-CONTR...C-P423954.aspx
    Here is one that has a security code (so anyone with your car's number can't start it) and it accepts +12VDC.

    Andrew

  10. #10
    FLAC
    Join Date
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    Quote Originally Posted by majasticmoose View Post
    A simpler idea. A DTMF decoder. What it does is every number on the dial pad a has corresponding tone (a DMTF tone) the tells the tower where to place your calls. So once you call "your car". The output of your phone in your car will be hooked up to a DMTF decoder. after the car "picks up". Any number you press will play a tone make the DMTF decoder trigger a relay which could start a car, unlock it, etc. It's very simple. ( and it sounds like what you are describing).

    http://jpl995.com/DTMF-DECODER-CONTR...C-P423954.aspx
    Here is one that has a security code (so anyone with your car's number can't start it) and it accepts +12VDC.

    Andrew
    That's an awesome idea. Hmm....
    My Nearly Complete Car:
    http://www.mp3car.com/vbulletin/show...ed-car-pc.html

    Micro Control Center... Control Your Car Across the Internet
    http://www.mp3car.com/fusion-brain/1...-internet.html

    Website: (It's a work in progress, really. All my projects have taken me from ever really developing it.)
    http://paulfurtado.com/

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