#include <NewSoftSerial.h>

char inchar; //Will hold the incoming character from the phone Port.
 int led1 = 9;
 int led2 = 10;
 int led3 = 11;
 int led4 = 12;


NewSoftSerial phone(2, 3);

void setup()
 {
 // prepare the digital output pins
 pinMode(led1, OUTPUT);
 pinMode(led2, OUTPUT);
 pinMode(led3, OUTPUT);
 pinMode(led4, OUTPUT);
 digitalWrite(led1, LOW);
 digitalWrite(led2, LOW);
 digitalWrite(led3, LOW);
 digitalWrite(led4, LOW);
 //Initialize GSM module serial port for communication.
 phone.begin(9600);; // for GSM module communication
 delay(1000); // give time for GSM module to register on network etc.
 phone.println("AT+CMGF=1"); // set SMS mode to text
 delay(200);
 }

void loop()
 {
 phone.println("AT+CMGL=\"REC UNREAD\"");
 delay(200);
 phone.println("AT+CNMI=3,3,0,0"); // set module to send SMS data to serial out upon receipt
 delay(200);

 //If a character comes in from the cellular module…
 if(phone.available() )

  {
 inchar=phone.read();
 if (inchar=='#')
 {
 delay(10);
 inchar=phone.read();
 if (inchar=='a')
 {
 delay(10);
 inchar=phone.read();
 if (inchar=='0')
 {
 digitalWrite(led1, LOW);
 }
 else if (inchar=='1')
 {
 digitalWrite(led1, HIGH);
 }
 delay(10);
 inchar=phone.read();
 if (inchar=='b')
 {
 inchar=phone.read();
 if (inchar=='0')
 {
 digitalWrite(led2, LOW);
 }
 else if (inchar=='1')
 {
 digitalWrite(led2, HIGH);
 }
 delay(10);
 inchar=phone.read();
 if (inchar=='c')
 {
 inchar=phone.read();
 if (inchar=='0')
 {
 digitalWrite(led3, LOW);
 }
 else if (inchar=='1')
 {
 digitalWrite(led3, HIGH);
 }
 delay(10);
 inchar=phone.read();
 if (inchar=='d')
 {
 delay(10);
 inchar=phone.read();
 if (inchar=='0')
 {
 digitalWrite(led4, LOW);
 }
 else if (inchar=='1')
 {
 digitalWrite(led4, HIGH);
 }
 delay(10);
 }
 }
 phone.println("AT+CMGD=1,0");
 }
 }
 }
 }
 }