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GPS GSM/GPRS vehicle tracker

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paulchezhian

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Hi everybody, I'm doing my masters. I'm currently doing a project which is basically a vehicle tracker using GPS and GSM/GPRS. I'm ok with the uC getting the data from GPS module and directing it to GSM module to send an SMS. But, I'm not able to find out how to connect it to internet via GPRS so that I can send it to a server.... Can anyone suggest me how it can be done.... Also, do I need to add some extra hardware for GPRS or can I just add coding to activate the GPRS connection. (My SIM card is already having GPRS connection from the provider). I'm using ATMega processor.
 

paulchezhian said:
But, I'm not able to find out how to connect it to internet via GPRS so that I can send it to a server.... Can anyone suggest me how it can be done.... Also, do I need to add some extra hardware for GPRS or can I just add coding to activate the GPRS connection. (My SIM card is already having GPRS connection from the provider). I'm using ATMega processor.
Click to expand...

First check If you can Dial-out from your ATMega. Then send AT commands to your phone. if that is done. then you are connected and have a data link. next is PPP handling.
 

I get what u say..... Its lik, first i need to connect my GSM module as a data interface to my PC and then test how it responds to the AT commands..... Then, wen its done, I can connect to the uC and run my C code as usual but with GPRS snippet included.

Now, My GSM module selected is GR64 (I can change this one, no probs!) It has 60 pins in which I have given Vcc, On/Off, RTS,CTS,DCD,DTR,RI, Tx,Rx connections to my ATMega128L. So, I should connect an interface with COM port to my PC before fixing this on PCB... Is it so.... If so, What interface should I use.... Is it strictly COM port?? (I've configured routers thro Hyperterminal but no experience in GSM modules, sorry) :(
Or should I change my GSM/GPRS module??

---------- Post added at 14:06 ---------- Previous post was at 14:04 ----------

@ blue hole & @ ckshivaram : Hey, Thanks a lot for explaining step by step. I've read some your previous posts where you have helped others. It has also helped me indeed.
 

Hi paul,
i hope ter s no need to change ur modem, rather u can give two provision for debugging the modem and connecting it to uC using same Tx and Rx.
 

@ckshivaram : Ya, the first Pdf of ericsson. But, not the one from wavecom.

@e shade : How is that Possible?:?
 

Hi paul
In this case u can access the modem through uC or debug the modem at a time,one u are familiar with checking of modem settings by directly passing At commands, generate the same commands through ur uC and pass it to modem bypassing ur connection to external D9 port.
 

hey in that you connect both thing gsm modem and gps modem then there only one serial port in uc then how you connect both thing(gsm and gps with one uc) together.

paulchezhian said:
Hi everybody, I'm doing my masters. I'm currently doing a project which is basically a vehicle tracker using GPS and GSM/GPRS. I'm ok with the uC getting the data from GPS module and directing it to GSM module to send an SMS. But, I'm not able to find out how to connect it to internet via GPRS so that I can send it to a server.... Can anyone suggest me how it can be done.... Also, do I need to add some extra hardware for GPRS or can I just add coding to activate the GPRS connection. (My SIM card is already having GPRS connection from the provider). I'm using ATMega processor.
Click to expand...
 

HI deepak,
R u using the same ATmega uC, in that case which series?
 

deepakgupta.rf said:
hey in that you connect both thing gsm modem and gps modem then there only one serial port in uc then how you connect both thing(gsm and gps with one uc) together.
Click to expand...

U can connect both the gps modem and gsm modem simultaneously, but when recieving data from gps, switch off the power supply of gsm modem by controlling it through ur output port and if it runs on 12v , use l29
Can anyone help me to send data to a remote server via gsm modem. PLZ thanking you

dont use sms or short hand typing skills in this forum... type the complete words by spending few more seconds. this is the last warning and further posts and thread of yours will be deleted without informing you if continued
Click to expand...
 
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yes i am using atmega 8535 and atmega32l both, there i switch gsm and gps whenever i need through one serial port.
but i need to know about atmega128l how it wud be used. both devic ewotk at the same time anf do communication .
 

you should be clear with the requirement... both cannot work at same time as GPS will receive the data every one second... you cannot transmit the data using gsm/ gprs at that speed....

you have to wait for some change in the data and if there is a change then get the co-ordinates or send a sms request and then send gps data at that time of request.....
 

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