Actions
Forum Thread Details
  • State Not Answered
  • Replies 3 replies
  • Subscribers 392 subscribers
  • Views 517 views
  • Users 0 members are here
Related

Road speed limit project

Former Member

Hello, I'ts my first post here, so dont get mad if it's not the right subforum for this topic. I would just like some ideas/opinions for my project, because maybe I am forgetting something in addition to i am new with arduino

 

the idea is a device that tracks a car's speeds and omits a message to the driving control authority, in case the car exceeds the speed limit. so What I am trying to build, is a Speed limit notification system that can sense my location and speed using GPS then compare it to defined speed for the current road using algorithm then send data over GSM network to my webserver or mobile phone warning me if i exceed the speed limit .

 

What I need to achieve (and my plans to do so) are:

 

1. Arduino Uno

 

2. GPS module

http://www.zeroohm.ae/Adafruit-Ultimate ... search=gps


 3. GSM shield for network connection or sms sending

 

http://www.zeroohm.ae/Arduino-GSM-Shiel ... search=gsm


 5. so i will defined maybe two or three roads using this techniques and define any speed i want

http://forum.arduino.cc/index.php?topic=136265.0



 Is these parts good ?

is it ok to connect GPS module through gsm shield to Arduino ?

I'm working on this project alone, maybe I have missed something, maybe theres a better solution for something, maybe someone else has some great ideas they are willing to share, regarding this idea and how to pull it off.

 

Thanks all

and sorry about my english

  • 0

    Hi Mohammad,

    There are hundreds of different GPS and GSM modules, but in general it doesn't matter what you use provided you have sufficient information (datasheets primarily) to get you going. If there are no datasheets you need to contact the manufacturer/supplier to ask them for that. The other option is to find some example code if someone has managed to get those particular parts running, but this is just luck. Better to obtain datasheets and create your code to that datasheet specification.

    If you are not comfortable developing from scratch in this way, then try to find existing projects that do 'something' with and Arduino and a GPS module (doesn't have to be related to your project) and examine the code and buy the exact same GPS module. Then look for a project to do 'something' with an Arduino and a GSM module, check to see if there will be any wiring clashes (bear in mind for example that I2C is a serial interface and so can be chained) and repeat.

    Then at least you have known example code for the parts you have purchased. You'll still have to write your own code to join it all together to complete the project of course, but at least you are starting with known hardware and example code or datasheets.

  • 0

    I'll echo the same thing shabaz mentioned about documentation.  You might also think about one of the shields that integrates GPS and GPRS on a single PCB.  There are a variety of distributors around the world that carry these.  These are largely intended to work with mobile robots, so if this interests you might want to look at those sites.

     

    As far as GPS and GSM/GPRS on the same PCB this isn't a problem.  GPRS signals are 850-900MHz and 1800-1900MHz.  GPS uses 1176.45, 1227.60, and 1575.42MHz; with code carriers down in the 4-10MHz regions.  There is enough difference in freqs used and carrier wave types that this isn't a problem (obvious, since most smartphones also have GPS built-in).  The only thing I might suggest is to use external antennas, if possible.  GPS signals can be degraded quite a bit, if a chip antenna is blocked.

     

    It's a cool idea!

  • 0

    Just be aware some roads have differing speed limits along the same one. This may present some programming issues.

    Clem