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using GPRS to gather historical data from a modemed voltage measureing device

Posted on 2004-10-20
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Hello Gentlemen,

I have a question about an application with GPRS, it's not related to programming, I must apologize if I am in the wrong section, please redirect me if I am wrong.

I have an application where I have a voltage measuring device installed in the field, for example, the desert.  The device is able to communicate data via a modem, and sends back the historical trend data.

I would like to use this with GPRS, and I would like to use GPRS so that it can send data using this medium back to my central server.  
Can you outline a few things that I will require and need to look at?  What will I need and what types of hardware will I need?  I believe this means I need a service provider for the GPRS, does this mean I need a cell modem.  And how will everything interface together to make it work.

I long for your answers.

Phillip
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Question by:phillipy
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by:Jonybrv
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>>>does this mean I need a cell modem.

Yes, you need a cell GPRS modem.  This modem will help you connect to internet from any computer similar to dial-up internet connection with a speed of 14k to 18k. You can use the software on your computer then to transfer the data to the server using this connection to internet.  NO extra hardware needed

or .. if you have any handhelds devices like the one from Palm One, and the software to be compatible to run on this device, you can use the GPRS modem within this handheld or connect this handheld to a mobile phone which has a GPRS modem to transfer data
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by:IanTh
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    The device is able to communicate data via a modem, and sends back the historical trend data.

What kind of connection does it have?

bear in mind also that gprs isn't time sensitive
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by:imarshad
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First thing........
What type of device do you have ......I mean is it a microcontroller ? Pocket PC ? PC ? or what?
Are you able to program it ? and if you can program it then in what Language ?

and yes you will need a GSM/GPRS modem...... If the device donot have a PC with it then you will have to go for a special GSM/GPRS modem that has a TCP/IP stack implemented in it......I think the one from Telit has this functionality.......

If you have a PC at the remote site then you donot need that modem and you can use any GSM/GPRS modem.......

Some more points.......

What is the quantity of data that you need to send from your device and at what rate i.e how many times a day ?

If the data is small and you need to send it every 4-5 hrs then I will suggest you to go for SMS.....It can be easily integrated with a Microcontroller and easily programmed (GSM Modem)......This will also depend upon the package the Cellular provider is going to offer you......Some times SMS is cheaper and sometimes GPRS is cheaper....... But if you donot have a PC at the Remote site I strongly recommend to use SMS instead of GPRS.......

I hop this will be helpful information......

Imran
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by:imarshad
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One other option that you have is to use *data call*....It is the functionality of GSM.....also called CSD (circuit switched data)......In this you will only need to have a GSM modem with which you can call any remote location Data transfer rate is mostly 9600 kbps.....Maybe consulting your GSM/GPRS provider will be better for you as they will give you the rate and availability of these things......

Imran
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by:phillipy
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can you recommend a software that does the SMS messages gathering???
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by:imarshad
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I think PAQ and refund is a better option......

Imran
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modulo earned 0 total points
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PAQed with points refunded (500)

modulo
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