 |
 |
| View previous topic :: View next topic |
| Author |
Message |
syide
Joined: 10 Nov 2008
Posts: 16
Location: Malaysia
|
| How to transmit to GSM module |
 Posted: Sat Mar 21, 2009 4:41 am |
 |
|
This response from my modem.
| Code: | \0A21/2009 18:07:07.421 --> Latitude:AT+CMGF=1
OK
AT+CMGS="0129669558"
> Latitude:0300.5810.N \0D
--> +CMS ERROR: invalid text mode parameter\0D |
| Code: | rs232(baud=4800,parity=N,xmit=PIN_C5,rcv=PIN_C4,bits=8,stream=GPS,errors)//data from GPS to PIC
#use rs232(baud=115200,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8,stream=GSM1,errors)// data from PIC to PC
#byte portc=7
char k;
char i;
char buffer[80];
char busca[]="GPGGA";
const int cr=0x0D; // PIC press ENTER
const int cz=0x1A; // PIC press Control-Z
void main() {
set_tris_c(0x90);
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_spi(FALSE);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
do
{
while ( fgetc(GPS) != 36 );
for (k=0;k<17;k++)
buffer[k]=fgetc(GPS);
} while (strncmp(buffer,busca,5)!=0);
{k=0;
while (i!="*" && k<12)
{
i = fgetc(GPS);
buffer[k++]= i;
}
}
fprintf (GSM1, "AT");
fputc (cr, GSM1); // send ENTER (carriage return) signal
delay_ms (2000); // wait half second
fprintf (GSM1, "AT+CMGF=1");
fputc (cr, GSM1);
delay_ms (2000);
fprintf (GSM1, "AT+CMGS=\"0129669558\"");
fputc (cr, GSM1);
delay_ms (2000);
fprintf(GSM1,"\n\n\rLatitude:%s",buffer);
fputc (cz,GSM1);
delay_ms (2000);
//fputc (cr,GSM1);
} |
I want to tansmit data from gps to gsm.But i got error msg.It said "invalid text mode parameter".What the problem with the code?  |
|
 |
FvM
Joined: 27 Aug 2008
Posts: 2337
Location: Germany
|
|
| Posted: Sat Mar 21, 2009 7:03 am |
|
|
There are at least two errors, that potentially can cause failure of the code:
- i is uninitialized in while (i!="*" && k<12)
- terminating \0 isn't missing in buffer
The latter may cause failure of the CMGS action by sending an unprintable character.
Also your said "response from modem" doesn't seem exact, where you got e.g. the "-->"? An exact hexdump of both directions would be better to understand, what's going wrong.
As a more general comment, your method of decoding NMEA-0183 seems rather dubious, it would be better to use field delimiters rather than fixed length. I don't see, that NMEA specifies a certain field length. |
|
|
syide
Joined: 10 Nov 2008
Posts: 16
Location: Malaysia
|
|
| Posted: Sat Mar 21, 2009 7:41 pm |
|
|
I am able to print
| Quote: | AT+CMGS="0129669558"
Latitude:0300.5810,N, |
if i connect directly to hyperterminal without using modem.
Code.
| Code: |
#use rs232(baud=4800,parity=N,xmit=PIN_C5,rcv=PIN_C4,bits=8,stream=GPS,errors)//data from GPS to PIC
#use rs232(baud=115200,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8,stream=GSM1,errors)// data from PIC to PC
#byte portc=7
char k;
char i;
char buffer[80];
char busca[]="GPGGA";
const int cr=0x0D; // PIC press ENTER
const int cz=0x1A; // PIC press Control-Z
void main() {
set_tris_c(0x90);
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_spi(FALSE);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
do
{
while ( fgetc(GPS) != 36 ); // wait $
for (k=0;k<17;k++)
buffer[k]=fgetc(GPS); // store first 6 chars toel buffer[] (GPGGA)
} while (strncmp(buffer,busca,5)!=0); // compare if the first five chars are GPGGA, if not, keep searching
k=0, i=0;
while (i!="*" && k<12)
{
i = fgetc(GPS);
buffer[k++]= i;
}
buffer[k++] = '\0'; //terminate buffer
fprintf (GSM1, "AT");
fputc (cr, GSM1); // send ENTER (carriage return) signal
delay_ms (2000); // wait half second
fprintf (GSM1, "AT+CMGF=1");
fputc (cr, GSM1);
delay_ms (2000);
fprintf (GSM1, "AT+CMGS=\"0129669558\"");
fputc (cr, GSM1);
delay_ms (2000);
fprintf(GSM1,"\n\n\rLatitude:%s",buffer);
fputc (cz,GSM1);
delay_ms (2000);
//fputc (cr,GSM1);
}
|
By the way "-->" didn't have in modem response.It is from hyperterminal.I dun know how to do hexdump.
Thank u |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
FAQ 
Search
Register
Profile 
Log in to check your private messages 
Log in
