Hi
I'm trying to use GSM library for reading SMS but I can't connect SIM900 to it.I would like to use hardware serial for comunication at 9600 baud rate.I found some examples in GSM library but I don't know how to connect SIM900 to it.
/*
SMS receiver
This sketch, for the Arduino GSM shield, waits for a SMS message
and displays it through the Serial port.
Circuit:
* GSM shield attached to and Arduino
* SIM card that can receive SMS messages
created 25 Feb 2012
by Javier Zorzano / TD
This example is in the public domain.
http://www.arduino.cc/en/Tutorial/GSMExamplesReceiveSMS
*/
// include the GSM library
#include <GSM.h>
// PIN Number for the SIM
#define PINNUMBER ""
// initialize the library instances
GSM gsmAccess;
GSM_SMS sms;
// Array to hold the number a SMS is retreived from
char senderNumber[20];
void setup() {
// initialize serial communications and wait for port to open:
pinMode(PD2, OUTPUT);
digitalWrite(PD2, HIGH);
delay(1000);
digitalWrite(PD2, LOW); //turn on SIM900
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.println("SMS Messages Receiver");
// connection state
boolean notConnected = true;
// Start GSM connection
while (notConnected) {
if (gsmAccess.begin(PINNUMBER) == GSM_READY) {
notConnected = false;
} else {
Serial.println("Not connected");
delay(1000);
}
}
Serial.println("GSM initialized");
Serial.println("Waiting for messages");
}
void loop() {
char c;
// If there are any SMSs available()
if (sms.available()) {
Serial.println("Message received from:");
// Get remote number
sms.remoteNumber(senderNumber, 20);
Serial.println(senderNumber);
// An example of message disposal
// Any messages starting with # should be discarded
if (sms.peek() == '#') {
Serial.println("Discarded SMS");
sms.flush();
}
// Read message bytes and print them
while (c = sms.read()) {
Serial.print(c);
}
Serial.println("\nEND OF MESSAGE");
// Delete message from modem memory
sms.flush();
Serial.println("MESSAGE DELETED");
}
delay(1000);
}