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GPS modem interfacing with controllers

Former Member

Hi,

 

I am a student and I plan on making a final year project. I am trying to connect a controller to a mobile device using a wireless connection. I have no ideea what kind of wireless module to use. Are there some kind of GPS modems that can do this task? I am planning on transfering large data if possible. Maybe a GPRS or EDGE connection can be realized some how.

I have also heard about some long distance wireless kits ( can go up to 7km). Can these be connected to my smartphone/PDA?I know these are using 802.15 protocol while the phone WiFi is 802.11g.

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  • 0
    HI there... hopefully thats a good idea. can u please tell me the microcontroller you prefer to use with the part number? and the GPS you have bought?
  • 0 in reply to Former Member

    I did not acquire any parts yet because I am still on the brain-storming part, but I am planning on using an ATMEGA controller( any other would do too I think... also I have thought of an ARM).

    Concerning the GPRS module I started to look at the SIM300 from SimCON. I noticed that they have a great documentation and their not that expensive either.

    I quited the ideea of a GPS module. This will be an optimization maybe after I will integrate the GPRS module with an uController.

     

    After doing some research I came accross this schematic(attached). I do not fully understand the schematic but I would like to ask you your oppinion on this circuit, and if your answer is possitive I could look into it some more.

     

    Thank you for your interest.

    Attachments:
    imageAVR-GSM.pdf
  • 0 in reply to Former Member

    Hello Alexandru,

     

    I am afraid you might be biting off more than you can chew.  There are a couple of facts you need to be aware of.

     

    1.  GPS stands for global positioning system.  This system provides you with a location of the earth using a receiver unit on the ground.  The system has some 32 satellites in space and orbit the planet.  The receiver on the ground picks up signals from each of the satellites and can determine the location on the earth.  see... http://en.wikipedia.org/wiki/Global_Positioning_System

     

    2. GPRS stands for General packet radio service.  It is a cellular phone service that allows you to transmit data information through the cellular phone system.  However, it is not necessarily available from all of the telephone companies. see.... http://en.wikipedia.org/wiki/Gprs

     

    3. Developing a cellular phone module is not easy nor  is it cheap.  It should definitely not be done by a student.   The development costs will run you over $50,000 or even $250,000 and the certification costs will be close to $50,000 as well.  You need certification or at least a partnership agreement with the cellular phone company before you are allowed to test on the cellular network of choose.

     

    4.  The picture of the development kit you provided is not a schematic and does not do anything.  The picture you provided is an interface board that will allow you to interface between a RF module and the development PC.  You need to research what module you need first before you buy one of these.

     

    If you are planning to building something for a class project ( ie: your industry project)  you need to think smaller.   I would suggest you look at a radio frequency link that uses modules.   There are many companies on the market that provide you a simple wireless system to get you going.

     

    Here are a few.

     

    http://focus.ti.com/analog/docs/rfifcomponentshome.tsp?familyId=367&contentType=4&DCMP=TIHomeTracking&HQS=Other+OT+home_p_rf_if

     

    http://www.digi.com/

     

    Need more help see.

     

    http://www.pinterec.ca/services/wireless-development/ti/low-power-rf-zigbee

     

    Hope this helps,

     

    Chris Pinter

    http://www.pinterec.ca

  • 0 in reply to Former Member

    I think you would be better using something like the Android platform.

    It has all the baseband (mobile data) and wifi stacks taken care off, all you need to do is develope an application to do whatever it is you need.

    You can transfer data locally to the device via the built-in WiFi and then transfer data over the wide-area using the built in mobile radios.

     

    Android can be found at www.android.com

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