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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
    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/

    Comment


    • #3
      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?

      Comment


      • #4
        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/

        Comment


        • #5
          Have you seen this article?
          http://www.serasidis.gr/circuits/sms...controller.htm
          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/

          Comment


          • #6
            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

            Comment


            • #7
              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/

              Comment


              • #8
                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?

                Comment


                • #9
                  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

                  Comment


                  • #10
                    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/

                    Comment


                    • #11
                      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
                      To be honest that's exactly what I've been looking for, and is the perfect solution to my problem. I'd like to build it myself though, I wonder how hard it would be to program a microcontroller for these purposes?

                      Comment


                      • #12
                        http://lmgtfy.com/?q=avr+dtmf+decoder
                        It looks like it will probably be easier/cheaper to go with the pre made ones, but it can definitely be done.
                        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/

                        Comment


                        • #13
                          Sorry forgot to post this. This guy used the idea but created a remote detonator with the relays. He used a 8870 DTMF IC from an answering machine. The schematic and programming files and info are in the link. Have fun.
                          http://spatulatzar.com/wireless_detonator/

                          Andrew

                          Comment


                          • #14
                            I originally contacted this company back in 2006, and since then, they've come out with some even better products than back then. They're mostly for the Industrial sector, but their products could definately be used with carpc's. I was originally looking at the SMS transceiver, but that might be discontinued. I noticed the link seems to be broken. However, the GSM Metron might be a suitable replacement, and does even more.

                            After typing all that, I went through my old emails and found a price list... around $500 for a unit... well, sounds like building one is what I'll probably do too.

                            Have fun and keep us posted!

                            Kris
                            How Much Horsepower Can I have And Still Go To Heaven?

                            Comment


                            • #15
                              Originally posted by IHateMayonnaise View Post
                              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?
                              Try Ricci Bitti's "Tiny Planet" project: http://www.riccibitti.com/tinyplanet/tiny_intro.htm
                              This "Tiny Planet" project was also published in the May 2002 issue of the Circuit Cellar magazine (issue #142). Since it was published in a large DIY electronics magazine I guess there must be some "instructive instructions", but I haven't tried to make this project myself.
                              It also use an AVR microcontroller. By using a bigger AVR you should be able to program it to use more in- and outputs. OR maybe the descrptions of this project can make you help understand Serasidis Valilis' project better too.
                              Serasidis Valilis' project was based on (or inspired by) Ricci Bitti's Tiny Planet project and was first time published 5 months after the Tiny Planet project was published in Circuit Cellar.

                              The best website to learn about AVR is this: http://www.avrfreaks.net
                              There's a big forum where you can find help for anything AVR related.

                              Comment

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