Send sms with sim900 using arduino

Question

 #include <Password.h> 
#include <Keypad.h> 
#include <Servo.h> 
#include "SIM900.h"
#include <SoftwareSerial.h>
#include "sms.h"

Servo myservo; 
Password password = Password( "1234" ); //password to unlock box, can be changed
SMSGSM sms;
int numdata;
boolean started=false;
char smsbuffer[160];
char n[20];

const byte ROWS = 4; 
const byte COLS = 4; 

// Define the Keymap
char keys[ROWS][COLS] = {
{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}
};
// Connect keypad ROW0, ROW1, ROW2 and ROW3 to these Arduino pins.
byte rowPins[ROWS] = { 9, 8, 7, 6 };// Connect keypad COL0, COL1 and COL2 to these Arduino pins.
byte colPins[COLS] = { 5, 4, 3, 2 };
int x=0;


// Create the Keypad
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

void setup()     //if i add sms(); function it workssss
{ 

   Serial.begin(9600); //Start a Serial COM

   Serial.println(F("ARDUINO SECURITY SYSTEM V1.0"));

   Serial.print(F("Checking GSM COM..."));

  if (gsm.begin(9600)) //Start the GSM COM
  {
    (sms.SendSMS("+XXXXX","Your Home Security system is powered up"));
    Serial.println(F("Good To GO!!"));
  }
  else
  {
    Serial.println(F("Could not connect to GSM modem"));
  }

  Serial.write(254);
  Serial.write(0x01);
  delay(200); 
  pinMode(11, OUTPUT);  //green light
  pinMode(12, OUTPUT);  //red light
  myservo.attach(13); //servo on digital pin 9 //servo
  keypad.addEventListener(keypadEvent);//add an event listener for this keypad

  }

void loop(){
  keypad.getKey();
  myservo.write(0);
  }
  //take care of some special events
  void keypadEvent(KeypadEvent eKey){
  switch (keypad.getState()){
  case PRESSED:

  Serial.print("Enter : ");
  Serial.println(eKey);
  delay(10);

  Serial.write(254);

  switch (eKey){
    case 'A': checkPassword(); delay(1); break;
    case 'C': checkPassword(); delay(1); break;
    case 'D': checkPassword(); delay(1); break;
    case 'B': password.reset(); delay(1); break;
    case '*': checkPassword(); break;
    case '#': password.reset(); break;

    default: password.append(eKey); delay(1);
  }
 }
}
void checkPassword(){

if (password.evaluate()){  //if password is right open box

    Serial.println("Accepted");
    Serial.write(254);delay(50);
    //Add code to run if it works
    myservo.write(5); //160deg

        digitalWrite(11, HIGH);//turn on
    delay(2000); //wait 5 seconds
    digitalWrite(11, LOW);// turn off   
}
else
{

    Serial.println("Denied"); //if passwords wrong keep box locked
    Serial.write(254);delay(10);
    x++;

    if(x==3)
    //add code to run if it did not work
   {
    myservo.write(0);
    digitalWrite(12, HIGH); 
    delay(500); 
    digitalWrite(12, LOW);  
  if (gsm.begin(9600)) 
  {
    (sms.SendSMS("+XXXXX","Your Home Security system is being bridged"));

    Serial.println("USER WARNED");
   }

}
}
}
;
}

In the picture, the same code does not work when I put the lines

if (gsm.begin(9600)) //Start the GSM COM
  {
    (sms.SendSMS("[phone]","Your Home Security system is being bridged"));

but these lines work fine inside the void install function.

How can I fix this problem? Inside the void installation, the sketch works fine, but when I also put the code in the CheckPassword function, it does not send SMS.

I also tried to create the let say void SMS function and call it in the checkPassword function, but it does not solve the problem, btw the same functions when the call in the void setup works fine.

Answer 1

You should gsmonly initialize once, in setup.

checkPassword, , , .

, gsm.begin(9600) checkPassword.

---

1:

9, 8, 7, 6, 5, 4, 3, 2 . 2, 3 GSM (. GSM.cpp):

 #define _GSM_TXPIN_ 2
 #define _GSM_RXPIN_ 3

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0, 1 , 10, 11, 13 - , .

GSM:

[3] . ?

, Google   .

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2) SIM90X (1 ) , ,       , . /        .

3) Arduino Uno 2 . 80% (        ), 20% , Arduino        .

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