Discussion in "Embedded GSM Development" started by    muahaha_psp    Apr 6, 2010.
Tue Apr 06 2010, 03:18 AM
#1
hi, can i ask a question...i have a circuit that consist from a sim300 gsm module that connected to pic16f877a by using max232. my circuit design is to detect if an sensor is triggered (ir), then the microcontroller will send sms to the user. i have acomplished this feature and my other problem is i cannot send sms to the microcontroller to switch on a relay to trigger a 5v relay that connected to my output (light). can u help me?
Tue Apr 06 2010, 04:09 AM
#2
post your program here for more help.

what are AT Commands you are using for this job...

[Topic moved to Embedded GSM Development Forum]
Tue Apr 06 2010, 04:20 AM
#3
this is my program.

#include <16f877A.h> //ic driver
#use delay(clock=20000000) //clock speed
#fuses hs,noprotect,nowdt,nolvp //ic setting
#use rs232 (baud=115200,xmit=PIN_C6,rcv=PIN_C7,PARITY=N,stream=GSM) //Serial Com Port for GSM

#byte PORTA=5 //define port address
#byte PORTB=6
#byte PORTC=7

#define led1 PIN_A0 //define pin
#define led2 PIN_A1
#define InfraRed PIN_B0
#define buzzer PIN_C0
#define light PIN_C1


//sensor
long timer=0;
int alarm=0;



//GSM register
int GSM_getsms=0;

//Serial register
char rx_buff;
char rx[80];
int rx_set=0;
int rx_cnt=0;

#int_rda //Serial interrupt to collect gsm data
void serial_isr (){

rx_buff=getc(); //collect sms command
if(rx_buff==0x0A){ //start byte
rx_cnt=0; //reset counter
}
rx[rx_cnt]=rx_buff; //move received data to array
rx_cnt++; //counter +1

if(rx[0]==0x0A && rx_buff==0x0D){ //end byte receive
rx[0]=0;
rx_set=1; //valid set data received
}
}

void main () //main program
{

set_tris_a(0x00); //define io pin; 1:input;0:output
set_tris_b(0xFF); //A0-A3:output,B0-B5:input,c0-c2:output
set_tris_c(0x00);

port_b_pullups(true); //enable pull up at port b

setup_port_a(NO_ANALOGS); //no analog signal

PORTA=0; //off all leads
PORTB=1;
PORTC=0; //off all portc output

enable_interrupts(GLOBAL);

fprintf(GSM,"AT+CMGD=1\r"); //Delete message, \r: return key
delay_ms(1000);

do
{
{
if(input(InfraRed)==0){
delay_ms(1000);
fprintf(GSM,"AT+CMGS=\"+60137546293\"");
fputc(0x0D,GSM); // command for enter
delay_ms(1000);
fprintf(GSM,"Infrared Sensor Activated : House Door Opened! ");
fputc(0x1A,GSM); // command for ctrl+Z
delay_ms(1000);
fputc(0x0D,GSM); // command for enter
delay_ms(1000);
output_low(InfraRed); // Switch off InfraRed PORT
fprintf(GSM,"AT+CMGD=1");
delay_ms(1000);
fputc(0x0D,GSM);
delay_ms(1000);
}

if(input(InfraRed)==0){
alarm=1;
}
if(input(InfraRed)==1){
alarm=0;
}
if(input(InfraRed)==0){
output_high(led1);
}
if(input(InfraRed)==1){
output_low(led1);
}
if(alarm==1){
output_high(buzzer);
}
if(alarm==0){
output_low(buzzer);
}


if(rx_set==1){
rx_set=0; //reset

if(rx[3]=='T' && rx[4]=='I'){ //SMS received +CMTI: "SM",1
printf("AT+CMGR=1\r"); //Get SMS
}
if(GSM_getsms==1){ //Get Message
GSM_getsms=0;


if(rx[1]=='1'){ // Light

if(rx[2]=='0'){
output_low(light);
output_low(led2);
}
if(rx[2]=='1'){
output_high(light);
output_high(led2);
}
}
}

delay_ms(2000); //wait for GSM process
printf("AT+CMGD=1\r"); //Free memory
delay_ms(1000);
}

if(rx[3]=='G' && rx[4]=='R'){ //Prepare get SMS +CMGR:
GSM_getsms=1;
}

rx[4]=0; //Free memory
rx[5]=0;
}

timer++;
}while(TRUE);
}



i use ccs programming for this.....the idea is to send sms to trigger certain relay like example to on light bulb,...can anybody help me? about the sms that microcontroller send to user handphone to inform about the sensor triggerd i've already accomplished..only this one keep delaying my work..ur opinion is greatly needed...

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Posted By ajay_bhargav
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ajay_bhargav
Mon Jul 28 2014, 12:34 AM
@ Anshu Raj sorry we do not take such requests.
Sun Jul 27 2014, 12:23 AM
Anshu Raj
sir plz send the automatic collage alram bells in 2 hrs bells ring. For microcontroller programme plz sir
ajay_bhargav
Thu Jul 24 2014, 01:06 AM
@R.ABHISHEK where? I dont see it. is it in forum?
Wed Jul 23 2014, 05:49 AM
R.ABHISHEK
sir,pls message on microcontroller 8051 assambly language new program
Wed Jul 23 2014, 05:47 AM
R.ABHISHEK
sir,pls message on 8051 microcontroller assambly language program new quastions
ajay_bhargav
Tue Jul 22 2014, 09:18 AM
@Pragya Android application is taken from google play. Only Author has its source with him. Application is only used in this project.
Tue Jul 22 2014, 04:58 AM
Pragya
plz send me 8051 code and android code for android based device controller via Bluetooth .Here in this project I am using Hc-06 Bluetooth module
Thu Jul 10 2014, 09:57 AM
Caleb
plz someone mail me the source code for that project
Thu Jul 10 2014, 09:57 AM
Caleb
http://www.8051projects.net/download-d188-control-your-pc-tv-remote.html
ExperimenterUK
Tue Jul 08 2014, 03:25 PM
Post questions in the forum.. this area is for chat

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Abbasans786
Mon Jul 28 2014, 03:15 AM
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Fri Jul 25 2014, 07:50 PM
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Sun Jul 20 2014, 05:38 PM
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