www.rhydolabz.com
SIM900 GSM/GPRS TTL UART Modem - User Manual
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/* This program module sends an SMS from the modem to a prefixed number
*/
void main()
{
SerialPortInit();
/* Serial Communication – 9600-N-8-1
*/
Send2Gsm("AT\r\n");
/* Transmit AT to the module – GSM Modem sends
OK */
DelayS(2);
/* 2 sec delay
*/
Send2Gsm("ATE0\r\n");
/* Echo Off
*/
DelayS(2);
/* 2 sec delay
*/
Send2Gsm("AT+CMGF=1\r\n");
/* Switch to text mode
*/
DelayS(2);
/* 2 sec delay
*/
Send2Gsm("AT+CMGS=\"+919447367176\"\r\n");
/* Send SMS to a cell number
*/
DelayS(2);
/* 2 sec delay
*/
Send2Gsm("TEST DATA FROM RhydoLABZ-COCHIN");
/* Input SMS Data
*/
SerialTx(0x1a);
/* Ctrl-Z indicates end of SMS
*/
DelayS(2);
/* 2 sec delay
*/
while(1);
}
Function Description
SerialPortInit
– Module to initialize serial communication parameters
Send2Gsm
-- Module to transmit a string of data through Serial Port
SerialTx
– Module to transmit a byte through serial port
