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Vehicle Tracking Sytsem using GPS

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shirazi2589

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Hey all,
I am doing a project on Vehicle Tracking system using GPS. I want to learn about the output of a GPS Receiver, how to parse it, how does it communicate with a uC(I am using 8051). And how to interact with a GSM modem.I know GSM modem works on AT commands.Where can I get more info on AT commands. Or is there any good books available on At commands..Pls help
 

shirazi2589 said:
Hey all,
I am doing a project on Vehicle Tracking system using GPS. I want to learn about the output of a GPS Receiver, how to parse it, how does it communicate with a uC(I am using 8051). And how to interact with a GSM modem.I know GSM modem works on AT commands.Where can I get more info on AT commands. Or is there any good books available on At commands..Pls help
Click to expand...

Dear to communicate with GPS receiver or GSM modem u need to have a processor or microcontroller with serial port. Below is a good tutorial 4 GSM modem

Short Message Service / SMS Tutorial
 
Thank you very much.
Also u know ne thing related to GPS receivers output.
Also can u get me some sample codes related to Serial communication with GPS receiver and GSM modem
 

Pls help me with the selection of GPS. What parameters should i look for in my GPS receiver. One of my friends told me that look for GPS with 20 or more channels What does this statement exactly mean?
What all parameters should i look for before buying a GPS receiver
 

Dear i think u experimenting GPS 4 the first time, so i advise u to buy GARMIN ETREX LEGEND gps unit, which i am using at this time.

By the way below are the some links, which may help u 2 buy the unit.

GPS overview: Garmin | What is GPS?
GPS buying guide: **broken link removed**

Hope this helps.
 

search for vehicle tracking system... i have already given the complete solution to many here from past many years...

check gsm and gpson hyperterminal individually and see what data you get .... understand it...

then learn NEMA protocol basics and AT commands.... once y ou are confident then begin the project....


There are lots of material i have posted already... check it... you may not need any other help

---------- Post added at 16:54 ---------- Previous post was at 16:49 ----------
ayazahmed said:
dear i think u experimenting gps 4 the first time, so i advise u to buy garmin etrex legend gps unit, which i am using at this time.

By the way below are the some links, which may help u 2 buy the unit.
Click to expand...

dont use sms short forms if you wish your post be retained on the forum.. It is read by people across the world .. You will be warned by moderators if it is repeated, and banned if continued.....
 

Hey all,
Im doing a final year project on Vehicle Tracking System using GPS/GPRS. The Gps sends me the GPRMC data which through my SIM300 GSM Modem would transfer over TCP/IP using GPRS to my server.
My doubt is while i try to establish a GPRS connection i get an error message ERROR: 6 STATUS: IP STATUS with my AIRTEL card
and CONNECT FAIL STATUS: IP CLOSE with my vodafone card.
The entire code is ;

AT+CGATT=1
OK
AT+CSTT="airtelfun.com","","" //with airtel and AT+CSTT="www","","" with vodafone card username and pwd not required.
OK
AT+CIICR
OK
AT+CIFSR
10.XX.XX.XX // IP ADDRESS
AT+CDNSORIP=1
OK
AT+CIPSTART="TCP","www.google.com",80
OK
ERROR: 6 /* WITH AIRTEL CARD*/
STATUS: IP STATUS

STATE: IP CLOSE // MY VODAFONE CARD
CONNECT FAIL

what might be the problem.
 

With regard to the IP address specified
Code: 
10.XX.XX.XX // IP ADDRESS
it is within a private network - were you within the same network when you attempted to contact it? if not that is probably the cause of your error
 

100.1.200.99

10.163.78.175

these were the 2 IP addresses allotted to me when i used my airtel card to connect to the gprs nw twice.
"were you within the same network when you attempted to contact it? if not that is probably the cause of your error"
yes i was connecting with airtel sim so yes i was in the same nw
 

could you be having a problem with the DNS, try using an IP address rather than a URL
Code: 
AT+CIPSTART="TCP","www.google.com",80
my DNS severs tells
Code: 
Host name: www.goggle.com
IP address: 174.120.244.218
Alias(es): None
 

i have tried using IP addresses as well

AT+CIPSTART="TCP","209.85.231.104",80 // ip for google.com

but the result's unaffected
 

hey i am able to establish a gprs connection. i need to send my gprmc string to the server. for the sake of testing i send my name to the server i.e shirazi using
AT+CIPSTART="TCP","http://www.sayedalimiradatar.co.in","80"
OK

CONNECT OK
AT+CIPSEND
> GET/try.php?name=shirazi HTTP/1.0 [Ctrl+ENTER][Ctrl+ENTER][Ctrl+Z]
is this the correct way of sending. when i do this i get the reply as follows


Code: 
AT+CIPSEND
> GET/try.php?name=shirazi HTTP/1.0 [Ctrl+ENTER][Ctrl+ENTER]

HTTP/1.1 400 Bad Request
Date: Fri, 18 Mar 2011 19:11:34 GMT
Server: Apache mod_fcgid/2.3.6 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontP
age/5.0.2.2635
Connection: close
Content-Type: text/html

<head>
              <style type="text/css">
                                                     * { margin: 0; padding: 0;
}

                 html { height:100%; }

                                                      body {
                                                                            text
-align: left;
                             width: 100%;
                                                         height: 100%;

      font-size: 62.5%;
                                       font-family: Helvetica, arial, sans-serif
;
                 color: #000;
                                             background: #fff;
                                                                              ma
rgin: 0;
                        border: 0;
                                                  padding: 0; }
                                                               </style>
                                                                       </head>
                                                                              <b
ody>
    <iframe src="http://searchdiscovered.com/?pid=5POJ5651L&dn=" width="100%" he
ight="100%" frameborder="0"></iframe>
                                     </body>

CLOSED
What is the problem why am i not getting shirazi displayed at the host

I've written a code at my host such that whatever the string is send it would display that or even of i visit the site it would display an blank space

What you sent is:
ENTERED 1: asif
ENTERED 2: salman
ENTERED 3:
ENTERED 4:
ENTERED 5:
ENTERED 6: salman
ENTERED 7:
ENTERED 8:
ENTERED 9:
ENTERED 10:
ENTERED 11:
ENTERED 12:
ENTERED 13:

.

this is the screen shot of my host
Click to expand...
 

hello guys, I am working on the same project and I need some help here.
I am using a 8951uC, but the problem is that I am having only a single UART but have to interface 2 devices(GSM & GPS). Can I use a multiplexer to solve it and is there any other solution? Could anyone please provide me the specification of the mux as well.
One thing I searched in the forum was that I can use a NAND gate to connect the GPS device only, is that possible?
 

use a relay.. i have given solution before also..........

---------- Post added at 22:00 ---------- Previous post was at 21:59 ----------

i had posted complete circuit also.. do a search in the forum.....
 

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