Coding SMS Arduino

#include <gprs.h>

#include <softwareserial.h>

#define TIMEOUT    5000

#define LED_PIN    13

#define ON LOW

#define OFF HIGH

const int Relay1 = 2;

const int Relay2 = 3;

const int Relay3 = 4;

const int Relay4 = 5;

int StatRelay1;

int StatRelay2;

int StatRelay3;

int StatRelay4;

GPRS gprs;

void setup() {

  pinMode (Relay1 , OUTPUT); digitalWrite (Relay1, HIGH);

  pinMode (Relay2 , OUTPUT); digitalWrite (Relay2, HIGH);

  pinMode (Relay3 , OUTPUT); digitalWrite (Relay3, HIGH);

  pinMode (Relay4 , OUTPUT); digitalWrite (Relay4, HIGH);

  Serial.begin(9600);

  while(!Serial);

  Serial.println("Starting SIM800 Auto Read SMS");

  gprs.preInit();

  delay(1000);

  while(0 != gprs.init()) {

      delay(1000);

      Serial.print("init error\r\n");

  }

  //Set SMS mode to ASCII

  if(0 != gprs.sendCmdAndWaitForResp("AT+CMGF=1\r\n", "OK", TIMEOUT)) {

    ERROR("ERROR:CNMI");

    return;

  }

  

  //Start listening to New SMS Message Indications

  if(0 != gprs.sendCmdAndWaitForResp("AT+CNMI=1,2,0,0,0\r\n", "OK", TIMEOUT)) {

    ERROR("ERROR:CNMI");

    return;

  }

  Serial.println("Init success");

}

//Variable to hold last line of serial output from SIM800

char currentLine[500] = "";

int currentLineIndex = 0;

//Boolean to be set to true if message notificaion was found and next

//line of serial output is the actual SMS message content

bool nextLineIsMessage = false;

void loop() {

  //Write current status to LED pin

  digitalWrite(Relay1, StatRelay1);

  digitalWrite(Relay2, StatRelay2);

  digitalWrite(Relay3, StatRelay3);

  digitalWrite(Relay4, StatRelay4);

  

  //If there is serial output from SIM800

  if(gprs.serialSIM800.available()){

    char lastCharRead = gprs.serialSIM800.read();

    //Read each character from serial output until \r or \n is reached (which denotes end of line)

    if(lastCharRead == '\r' || lastCharRead == '\n'){

        String lastLine = String(currentLine);

        

        //If last line read +CMT, New SMS Message Indications was received.

        //Hence, next line is the message content.

        if(lastLine.startsWith("+CMT:")){

          

          Serial.println(lastLine);

          nextLineIsMessage = true;

          

        } else if (lastLine.length() > 0) {

          

          if(nextLineIsMessage) {

            Serial.println(lastLine);

            

// ########## MEMBACA KONTEN SMS DAN MENCARI+MENGARTIKAN KONTEN SMS KE PROGRAM #########

            //Kendali Relay

              if(lastLine.indexOf("Relay1 ON") >= 0){

              StatRelay1 = ON;

              Serial.println("Relay1 DINYALAKAN");

              gprs.sendSMS ("08xxxxxxxxxx","Relay1 DINYALAKAN");}

              else if(lastLine.indexOf("Relay1 OFF") >= 0) {

              StatRelay1 = OFF;

              Serial.println("Relay1 DIMATIKAN");

              gprs.sendSMS ("08xxxxxxxxxx","Relay1 DIMATIKAN");}

             

              if(lastLine.indexOf("Relay2 ON") >= 0){

              StatRelay2 = ON;

              Serial.println("Relay2 DINYALAKAN");

              gprs.sendSMS ("08xxxxxxxxxx","Relay2 DINYALAKAN");}

              else if(lastLine.indexOf("Relay2 OFF") >= 0) {

              StatRelay2 = OFF;

              Serial.println("Relay2 DIMATIKAN");

              gprs.sendSMS ("08xxxxxxxxxx","Relay2 DIMATIKAN");}

              if(lastLine.indexOf("Relay3 ON") >= 0){

              StatRelay3 = ON;

              Serial.println("Relay3 DINYALAKAN");

              gprs.sendSMS ("08xxxxxxxxxx","Relay3 DINYALAKAN");}

              else if(lastLine.indexOf("Relay3 OFF") >= 0) {

              StatRelay3 = OFF;

              Serial.println("Relay3 DIMATIKAN");

              gprs.sendSMS ("08xxxxxxxxxx","Relay3 DIMATIKAN");}

              if(lastLine.indexOf("Relay4 ON") >= 0){

              StatRelay4 = ON;

              Serial.println("Relay4 DINYALAKAN");

              gprs.sendSMS ("08xxxxxxxxxx","Relay4 DINYALAKAN");}

              else if(lastLine.indexOf("Relay4 OFF") >= 0) {

              StatRelay4 = OFF;

              Serial.println("Relay4 DIMATIKAN");

              gprs.sendSMS ("08xxxxxxxxxx","Relay4 DIMATIKAN");}

           

            

            nextLineIsMessage = false;

          }

          

        }

        

        //Clear char array for next line of read

        for( int i = 0; i < sizeof(currentLine);  ++i ) {

         currentLine[i] = (char)0;

        }

        currentLineIndex = 0;

    } else {

      currentLine[currentLineIndex++] = lastCharRead;

    }

  }

}