need help for GPS tracking through GPRS

Hi mclarenrulz,

really good job

using PICKit2?

and which PIC are you using? if its with USB, then you can make it a Mass storage device, which can be read on the go.

Hi

I managed to get myself the sim300 evb.
So how do i send data i get from the gps to a computer that's situated in a different place?

someone told me that the sim300 isn't able to do that, i have to have another board connected to the computer, etc. is it true?

but before this, when i asked here if it's ok to use the sim300 everyone here said its ok.
now i'm confused.

Read this thread for GPRS related commands
http://www.8051projects.net/forum-t18327.html

You just need an internet connection on other computer not necessarily a board. once your computer is on network, Run a TCP server there and connect to your computer using its IP and Port on which server is running and you are ready to send data.

Or put the location into a SMS message and use the SIM module to send it,
using the method we discussed on this site..
http://tinkerlog.com/2007/07/28/using-google-maps-with-a-mobile-gps-tracker/

someone told me that the sim300 isn't able to do that, i have to have another board connected to the computer, etc. is it true?

The SIM300 is able to do what you want and the remote computer just needs to be connected to the
internet.

Thanks, I'll try to read & understand it & maybe test it on my evb.

I was just wondering,most of these commands require a specific computer IP or email (in the tinkerlog case), how does this work if the gps user is on the road, active tracking?

How is it able to constantly send it's location data for it to be accessed to any computer?
Is that how these commands work?

I was just wondering,most of these commands require a specific computer IP or email (in the tinkerlog case), how does this work if the gps user is on the road, active tracking?

VioletRock

For the tracker to send it's location it needs a fixed address to send to,
not a fixed address to send from.
For SMS messages you use phone numbers, which are fixed.

For GPRS once a link is established the IP address of the tracker is fixed as long as the connection
is maintained.
In theory you can keep this link connected 24 hours a day
or you can just establish a link when you need to send your location.

The cost depends *very* much on your service provider.

Hi,

Can I get a clear explanation on how the programming part works.
I know there's the AT commands. So once I've tested these commands with the modem through hyperterminal, what do I do? I'm supposed to burn the commands onto the PIC?

Just wanted to be clear on the general basic procedures, coz I've never programmed a PIC before, and definitely new to AT commands

I know there's the AT commands. So once I've tested these commands with the modem through hyperterminal, what do I do? I'm supposed to burn the commands onto the PIC?

VioletRock

Testing the AT commands on the PC is an easy way to experiment and get a feel for what works
and what doesn't.

Once you know how the modem will respond when sent commands
you can move on to getting the PIC to send those commands.
You need to understand how to send text strings and how to receive them.
This is not trivial.

I advise you to try some simple exercises on programming a PIC such as
turning a LED on and off.
Then you can move on to using the PIC to send single characters to the PC
and receiving single characters from the PC.

That subject has been covered here in several threads and on the web.
Is you friend helping with the programming the PIC ?.

I tried plugging in my evb to the pc, and switched on its adapter and pwrkey.
But the pc cant seem to detect the modem at all. what should i do?
even when i tried typing at, i couldnt even type anything.

I already switched on the adapter, turn the s1 key OFF, s2 key ON and click the pwrkey for 1 second. The LED is suppose to light up right? But it's not lighting up at all.