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December 2, 2011 at 11:05 am #1424hm1622Participant
i am in final year of electronics and comm.my final year project is vehicle tracking system using gsm and gps module.
in which the tracking device is fixed on car and the device continuously(1 hour interval) send google map link on other cell phone.so guys please help me to complete this project1st where should i buy GSM and GPS module,which model is best for this kind of trecking application?
December 4, 2011 at 11:20 am #6907DexterParticipantyou have to use rs232 cable ,89c52 kit , sim 300, gps module capable of communication with rs232 and an activated sim cardwysiwyg_imageupload:3310:
December 6, 2011 at 8:31 am #6911hm1622Participantcan any one guide about the program??
because i have no idea about AT commands.
December 19, 2011 at 4:01 pm #6936Syed AameerParticipantPRODUCT NAME : GSM MODEM
HARDWARE : SIM 300 MODULE
COMMUNICATION : RS232
COMMANDS : AT
INPUT VOLTAGE : 12VDC / 1AMP
*************************************************************************************************************************
ANTENNA – PULL THE ANTENNA OUT IF THE SIGNAL IS WEAKHOW TO TEST!!!!
1. INSERT THE SIMCARD INTO SIM TRAY BACKSIDE
2. CONNECT THE RS232 CABLE TO THE PC SERIAL PORT – SERIAL PORT PROPERTIES ( RESTORE DEFAULTS – 9600 BAUD RATE)
3. OPEN HYPERTERMINAL FROM WINDOWS START>PROGRAMS>ACCESARIES>COMMUNICATIONS>HYPERTERMINAL
4. SELECT THE COMPORT WITH BAUD RATE 9600
5. TYPE “AT ” ECHO “OK” IF ECHO IS OK COMMUNICATION IS OK !!!!!!!!!+6. CHECK THE LED STATUS ( NETWORK SERCHING , NETWORK CONNECTED, IS SHOWN IN LED STATUS GIVEN BELOW)
****************************************************************************************************************************
Working state of network status indication LED OUTPUTState SIM300 function
Off SIM300 is not running
64ms On/ 0.8SEC Off SIM300 does not find the network
64ms On/ 3 SEC Off SIM300 find the network
64ms On/ 300ms Off GPRS communication
*****************************************************************************************************************************TO CHQ GAIN – AT+CSQ=?
TO CHK NETWORK – AT+COPS=?Examples for send and receive SMS
For sending SMS in text Mode:
AT+CMGF=1 press enter
AT+CMGS=”mobile number” press enter
Once The AT commands is given’ >’ prompt will be displayed on the screen.
Type the message to sent via SMS. After this, press ctrl+Z to send the SMS.
If the SMS sending is successful, “ok” will be displayed along with the message number.For reading SMS in the text mode:
AT+CMGF=1 Press enter
AT+CMGR= no.
Number (no.) is the message index number stored in the sim card. For new SMS, URC will be received
on the screen as +CMTI: SM ‘no’. Use this number in the AT+CMGR number to read the message.
Voice call
Initiating outgoing call:
ATD+ mobile number; press enter
For disconnecting the active call:
ATH press enter
For receiving incoming call:
ATA press enter**************************************************USEFUL AT COMMANDS FOR SETTINGS *****************************************************************
TO CHANGE BAUDRATE – AT+IPR=BAUDRATE(Ex 9600) 0-115200 For maore details refer AT commands Document page 33
TO SAVE THE SETTINGS AT&W
TO RESTORE FACTORY DEFAULTS TYPE AT&F THEN SAVE IT AT&W
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April 1, 2012 at 7:17 am #7375neha sharmaParticipanthello guys i am facing a problem in sending sms…..my developed code is here…plz check it out..thanxx in advance…!!!!#include<reg52.h>#define lcd_data P2#define lcd_cont() ((lcd_en=1),(delay(3)),(lcd_en=0))void UART_init();void send_to_modem(char*);void enter();void send(char);void ch_send_to_modem(char*);void lcd_init(void);void lcdcmd(unsigned char value);void lcddata(unsigned char value);void msgdisplay(unsigned char b[]);void delay(unsigned int value);void send_to_modem(char*);void enter();void send(char);void ch_send_to_modem(char*);unsigned char str[10],mobilenum[11]={“09887081656”};unsigned char mobilenum1[10];code unsigned char str1[]={“OK”};unsigned char l,s,n,a,b,i,count,j,jjj,hb=68;sbit temp=P1^3;sbit lcd_rs = P1^0;sbit lcd_en = P1^2;void main(){temp=1;lcd_init();UART_init();lcdcmd(0x84);msgdisplay(” welcome ” );delay(1000);lcdcmd(0x01);msgdisplay(“searching for”);lcdcmd(0xc0);msgdisplay(“GSM modem”);delay(100);send_to_modem(“ate0”); //to avoid echo signals,enter();send_to_modem(“at”);enter(); // TO CHECKING GSM MODEM…send_to_modem(“at”);enter();send_to_modem(“at”);enter();send_to_modem(“at”);enter();send_to_modem(“atr”);enter();for(mobilenum=0;mobilenum<11;i++);for(s=0;s<5;s++) // Here we are waiting for data whitch is sending by GSM modem{ // to checking wether the GSM modem connected to system orwhile(RI==0); // not.str=SBUF;RI=0;}/* str=’