B4R Question GPS & sim

Discussion in 'B4R Questions' started by tufanv, Jul 4, 2019.

  1. tufanv

    tufanv Expert Licensed User

    Hello,

    I am unclear about something. Lets Say I want to track a device (let's say a car) . I think I need a GPS module but how can I track the car with the gps module only ? is it possible or do I also need a simcard or stg similar to track it? sorry for the dumb question but I can't understand how tracking a car is possible ?

    Ty
     
  2. rbghongade

    rbghongade Active Member Licensed User

    You need 1)Nano ATMEGA328p
    2)SIM800 GSM module
    3)GPS module Ublox 6M or better
    Alternatively item 2) can be SIM868 GSM +GPS module
     
    hatzisn and tufanv like this.
  3. RJB

    RJB Active Member Licensed User

    There are devices designed to do this. You fit a SIM in them then you can dial them up and get their location. Some even allow listening to sound around the device!
    Search on EBAY! They are very inexpensive
     
  4. thetahsk

    thetahsk Active Member Licensed User

    There are so called "GPS Trackers" for children, dogs and vehicles on the market.
    Search for GPS Tracker, and you will find devices for less then 40 $.
     
  5. tufanv

    tufanv Expert Licensed User

    My purpose is to create a small device that can be attachable to some bikes,cars,scooters etc. I need to develop my own app and own trackers.
     
  6. tigrot

    tigrot Well-Known Member Licensed User

    I spent 5 years creating an infrastructure to store and follow Alzheimer unpaired people. We used small trackers. We saved many people in Rome
     
    moster67 likes this.
  7. tigrot

    tigrot Well-Known Member Licensed User

    It's cheaper to buy a tracker. Battery performances is a big issue, tracker are optimized for this. They generally use GPRS so you can interface a web structure.
     
    Peter Simpson likes this.
  8. BillMeyer

    BillMeyer Active Member Licensed User

    Hi,

    This is possibly what you are looking for:

    Link to Tracker

    I use them in South Africa - work very well.
     
    tigrot and inakigarm like this.
  9. tufanv

    tufanv Expert Licensed User

    That looks good but I need the gps location data on my own app is this possible with a ready-to-go tracker ? , also is there any distance limit for this ?
     
  10. emexes

    emexes Well-Known Member Licensed User

    It does, but that particular one is 2G, so check whether it is supported in your country, and for how much longer.
     
  11. Cableguy

    Cableguy Expert Licensed User

    I would go with the tracker... Buy a few an thinker with them to see if any of then can have it's firmware changed.. and then "own" them...
    Also, you could approach some Chinese manufacturers and scout for small production units... And you would do the software part.
     
  12. tufanv

    tufanv Expert Licensed User

    I am a bit lost here. First of all, what I don't understand is,
    1) this ready to go trackers can't be using a simcard to transmit data, if it is using a sim card how do they obtain the sim, from which and how is that company able to provide service in all other countries also are they subscribing to a service provider for each sim card used gps tracker ?
    2) if they are not using a simcard, how do they transmit the location data to their app ?

    Sorry if the questions are dumb but I am too amateur
    at this topic.
     
  13. emexes

    emexes Well-Known Member Licensed User

    Why not? It can, and it does.
    In Australia, we just go to the local post office or 7-Eleven or supermarket or... anywhere, it seems. $2 gets an empty SIM, $5 at Aldi gets a SIM with $5 credit.

    GPRS is a slow data connection to the internet, via the SIM provider's mobile/cellular network. So if you have GPRS, you can send data to any internet-connected computer in the world, same as you and I can do from our computers to this B4X forum server (seemingly physically located in Michigan, USA).
    You can buy a SIM card pretty much anywhere. I have done so in the US, Netherlands, England, France, Switzerland. And used some of those SIMs in other countries again, albeit at exorbitant rates.
    They are using a SIM card, thus this question is moot.
     
    tufanv likes this.
  14. emexes

    emexes Well-Known Member Licensed User

  15. Cableguy

    Cableguy Expert Licensed User

    Just to clarify, the SIM is the final customers to buy and install in the tracker.
    The trackers sold online come with NO SIM pre-installed!
     
    tufanv likes this.
  16. tufanv

    tufanv Expert Licensed User

    I got it now. Thanks for the answers guys! Ready-to-go trackers are a question mark because of the custom firmware thing. I need to get the data to my own app so I am thinking of using a sim900 module but I think I need to add a gps module as said in post 2
     
  17. emexes

    emexes Well-Known Member Licensed User

    Depending on your application, perhaps consider using a small cheap android phone as the tracker, or as a development bed. Has advantages:

    - price (there are always phones on special here for $29, and often less: I bought 4 a few months back at $14.50)
    - speaker (eg, for out-of-area alerts)
    - accelerometers (eg, fall detection, acceleration, braking, impact)
    - camera (eg, as a dash cam)
    - flexibility, via programming with B4A
    - supply continuity (vs trying to get compatible modules six months from now)
    - flexible interface via touch screen

    Disadvantages:

    - size
    - overkill
     
    Cableguy likes this.
  18. tigrot

    tigrot Well-Known Member Licensed User

    I have an app using Google firebase messaging. You can follow another android on the map. If you are allowed to do.
     
  19. tufanv

    tufanv Expert Licensed User

    I need to implement it to a fleet so it will be too expensive and inefficient :(
     
    emexes likes this.
  20. Cableguy

    Cableguy Expert Licensed User

    Automotive vehicles? If so, then it shouldn't be that difficult, since powering and space shouldn't be a problem, yet antenna placement is, since a car is pretty much a Faraday's Cage. I would go with a bumper located (it's only plastic) esp32 + gsm900 module.
     
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