http://wiki.seeed.cc/GPRS_Shield_v1.0/
siusti sms
AT+CMGF=1 OK AT+CMGS="+37067657342" > labas > > > > +CMGS: 2
void sendSMS()
{
clearString();
SIM900.printf("AT+CMGF=1\r"); //at command for send sms
wait_ms(100);
clearString();
wait_ms(100);
SIM900.printf("AT+CMGS=");
SIM900.putc('"');
SIM900.printf("+32292*******");
SIM900.putc('"');
SIM900.printf("\r");
SIM900.printf("Example Message SMS");
SIM900.putc(0x1A);
wait_ms(20000);
}