using gsm with gsm chip

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John Smith - 21 Aug 2006 20:03 GMT

I have a question regarding utilizing gsm service for real-time fleet
tracking. I understand I could put something together with a basic stamp,
gps unit and gsm chip to send back to a central database via a gsm phone or
maybe the internet.

My question is:
1.) Would I typically have to pay for service for each gsm communicating
chip in the system, or could I get data service for one phone or channel and
have all of the chips talk on the same data plan.

2.) Do you already have something like this reasonable?

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John Henderson - 21 Aug 2006 21:52 GMT

> I have a question regarding utilizing gsm service for
> real-time fleet tracking. I understand I could put something
[quoted text clipped - 7 lines]
> for one phone or channel and have all of the chips talk on the
> same data plan.

You'll need a separate GSM module (card) or modem, with its own
antenna and SIM (and phone number), in each vehicle.

Pre-paid SIMs are often used in these situations. For one
thing, they limit your costs if your microprocessor programming
isn't all it should be.

Depending on how frequently you want to update your location
information, and how cheaply you can get these services, either
GPRS sessions to an internet server or SMS to a central GSM
device would do the job.

> 2.) Do you already have something like this reasonable?

Sorry, can't help there.

John

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Me - 22 Aug 2006 06:57 GMT

>> I have a question regarding utilizing gsm service for
>> real-time fleet tracking. I understand I could put something
[quoted text clipped - 25 lines]
>
> John

On 2), there are commercial and non-commercial applications, as an example:
http://www.handango.com/PlatformProductDetail.jsp?siteId=1&jid=7826A7A88F894579C
4C64AAFCE5921C6&platformId=4&N=7&Ntt=GPS&productId=191939&R=191939

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