#include <SoftwareSerial.h>
// software serial #1: TX = digital pin 10, RX = digital pin 11
SoftwareSerial SIM800(10, 11);
void setup()
{

SIM800.begin(19200);
Serial.begin(19200);
SIM800.write("AT+CMGF=1\r"); //set GSM to text mode
delay(1500);

SIM800.write("AT+CPMS=\"SM\"\r"); //Preferred SMS Message Storage
delay(1000);

SIM800.write("AT+CMGR=1\n\r"); //list the first message from SIM Memory
while(1)
{
if(SIM800.available())
{
Serial.write(SIM800.read());
}
}
}

void loop()
{

}
دوستان من با این کد آخرین اس ام اس رو دریافت کردم.