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Telit GSM question

 
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Joined: 23 Aug 2005
Posts: 93

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Telit GSM question
PostPosted: Tue Feb 17, 2009 4:13 am     Reply with quote
Hi everyone,
Im trying to get some basics working on a application with a Telit GC864 GSM/GPRS quad sim, and a PIC18F97J60.

I just want to send an SMS to get things rolling..

Im using:

Code:

#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8,errors)

and C6-TXD on GSM
C7-RXD on GSM
Sending an SMS as follow:
Code:
void start_gsm(void)
{
   output_high(PIN_G3); //gsm module ON 
   output_low(PIN_B5);//debug
   delay_ms(1500);   
   output_low(PIN_G3);//GSM module released
}
//---  1. send SMS --------------------
void send_sms(void)
{ 
   start_gsm();     
   printf("AT+CMGF=1\n\r");//text mode
   delay_ms(1000);
   printf("AT+CMGS=+46762853050\n\r");
   delay_ms(500);
   printf("Testing SMS");   
   printf("%c\n\r",0x1A);//ctrl Z
   delay_ms(5000); //wait for message sent
   output_high(PIN_B5);//debug   
}

Its there something Im missing?
Some HW stuff? I would like to have no flow control, RTS to GND?
power to the unit seems ok, ON/OFF seems working.
I get a "signal" on my spec analyzer at ~900MHz when sending should be done.
Tagge



Joined: 23 Aug 2005
Posts: 93

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PostPosted: Tue Feb 17, 2009 6:02 am     Reply with quote
Solved,
the main thing is to give the module time to start,
I gave it 30 sec between start of module before trying to send sms.
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