home alarm security doesn’t work

[firdaus]

hello i have problem..i was did project home alarm security using gsm, when PIR sensor detect movement it will send sms and a siren will sound but when i do this project it doesn't work..i dont know what wrong is this may be coding for this PIC but i don't know how to read coding..can anyone help me?? this is my coding:

// Set of AT commands

const char ATat[]   = "AT";                        // Every AT command starts with "AT"

const char ATecho[] = "ATE0";                      // Disable command echo

const char ATtxt[]  = "AT+CMGF=1";                 // Change SMS mode to Text message mode

const char ATphone[]= "AT+CMGS="01945335243"";     // Send message to cell number : 123456789 (Enter your number instead of 123456789!)

 

// Alarm message

const char alarm_Message[] = "Alarm!!  Intruder Detected in your Home!!!";

//

// Responses to parse

const GSM_OK = 0;

const GSM_Ready_To_Receive_Message = 1;

 

//Declare the pins to use for PIR, Push Button and Siren

sbit PIR at RB0_bit;

sbit PIR_Input_Direction at TRISB0_bit;

sbit Push_Button at RB1_bit;

sbit Push_Button_Direction at TRISB1_bit;

sbit Siren at RB2_bit;

sbit Siren_Direction at TRISB2_bit;

sbit Status_LED at RB3_bit;

sbit Status_LED_Direction at TRISB3_bit;

 

#define ON 1;

#define OFF 0;

 

char gsm_state = 0;

char response_rcvd = 0;

short responseID = -1, response = -1;

 

// uart rx interrupt handler

void interrupt(){

char receivedByte;

  if (PIR1.RCIF == 1) {                  // Check if we have uart rx interrupt request?

   receivedByte = UART1_Read();         // Get received byte

 

// process reception of mode feedback, "OK" and "> " responses

    switch (gsm_state) {

      case  0: {

                response = -1;                   // Clear response

                if (receivedByte == 'O')         // We have 'O', it could be "OK"

                  gsm_state = 1;                 // Expecting 'K'

                if (receivedByte == '>')         // We have '>', it could be "> "

                  gsm_state = 10;                // Expecting ' '

                break;

               }

      case  1: {

                if (receivedByte == 'K') {       // We have 'K' ->

                  response = GSM_OK;             // We have "OK" response

                  gsm_state = 20;                // Expecting CR+LF

                }

                else

                  gsm_state = 0;                 // Reset state machine

                break;

               }

      case 10: {

                if (receivedByte == ' ') {

                  response_rcvd = 1;             // We have "> " response

                  response = GSM_Ready_To_Receive_Message; // Set reception flag

                  responseID = response;         // Set response ID

                }

                gsm_state = 0;                   // Reset state machine

                break;

                }

 

      case 20: {

                if (receivedByte == 13)          // We have 13, it could be CR+LF

                  gsm_state = 21;                // Expecting LF

                else

                  gsm_state = 0;                 // Reset state machine

                break;

               }

      case 21: {

                if (receivedByte == 10) {         // We have LF, response is complete

                  response_rcvd = 1;             // Set reception flag

                  responseID = response;         // Set response ID

                }

                gsm_state = 0;                   // Reset state machine

                break;

               }

      default: {                                 // Unwanted character

                gsm_state = 0;                   // Reset state machine

                break;

               }

    }

  }

}

 

// Send command or data to the GSM Module

void Send_to_GSM(const char *x)

{

// Send command or data string

   while(*x) {

      UART1_Write(*x++);

   }

// Terminatation by CR(Enter)

   UART1_Write(0x0D);

}

// Get GSM response, if there is any

short Get_response() {

  if (response_rcvd) {

    response_rcvd = 0;

    return responseID;

  }

  else

    return -1;

}

// Wait for GSM response

void Wait_response(char rspns) {

  while (Get_response() != rspns)

    ;

}

// Send alarm SMS!

void Send_Alarm_Message(){

       Send_to_GSM(ATtxt);    //Set SMS mode to text

       Wait_response(GSM_OK); //Wait for modem to reply "OK"

       Send_to_GSM(ATphone);  //Send message to cell number

       Wait_response(GSM_Ready_To_Receive_Message); //Wait for modem to reply "> "

 

       //Send the alarm message

       Send_to_GSM("Alarm!!rn");

       Send_to_GSM("Intruder Detected in your House!!!rn");

       Send_to_GSM("Siren will be activated in few seconds.");

       UART1_Write(0x1A);          //Cntrl + Z to send message

       UART1_Write(0x0D);          // Enter

       Wait_response(GSM_OK);      //Wait for modem to reply "OK"

}

 

// 30 Seconds delay

void Wait_30S(){

char i;

    for(i = 0; i < 30; i++){

      Delay_ms(1000);

    }

}

// 1 min delay

void Wait_1minute(){

char i;

    for(i = 0; i < 60; i++){

      Delay_ms(1000);

    }

}

 

char alarm_armed = 0;

int count,i;

 

void main() {

  

  WDTCON = 0;

  ADCON1 |= 0x0F;                 // Configure all ports with analog function as digital

  CMCON  |= 7;                    // Disable comparators

 

// Enable Uart Rx interrupt

  PIE1.RCIE   = 1;

  INTCON.PEIE = 1;

  INTCON.GIE  = 1;

 

  PIR_Input_Direction = 1;        //Set RB0 bit as input to read the state of the PIR

  Push_Button_Direction = 1;      //Set RB1 bit as input to read the state of the Push Button

  Siren_Direction = 0;            //Set RB2 bit as output to control the Siren relay

  Siren = OFF;                    //Switch OFF the Siren

  Status_LED_Direction = 0;       //Set RB3 bit as output to switch ON/OFF the status LED

  Status_LED = OFF;               //Switch OFF the status LED

 

  UART1_Init(19200);             // Initialize USART module

  Delay_ms(100);

 

// synchronize baud rate

  while(1) {

    Send_to_GSM(ATat);                            // Send "AT" string until GSM862 sets up its baud rade

    Delay_ms(100);                               // and gets it correctly

    if (Get_response() == GSM_OK)                // If GSM862 says "OK" on our baud rate we program can continue

      break;

  }

 

// Disable command echo

 Send_to_GSM(ATecho);

 Wait_response(GSM_OK);

 

 

 while(1){

 if (alarm_armed) {     //Check if the alarm is armed!

  count=0;

 if(PIR) {           // If motion was detected !

 for( i = 0; i < 10; i++){  // Test few times if there is still motion (500ms), so you don't misfire

   if (PIR) {       // If motion is still detectable

     count=1;

     delay_ms(50);

    }

   else

    {

     count=0;

     return;

    }

 }

 if (count)

  {

    Wait_30S();             //Wait for 30 Seconds

    Send_Alarm_Message();   // send alarm message

    Wait_30S();             //Wait for 30 Seconds

    if (alarm_armed ){

      Siren = ON;          // Activate the Siren (Relay)

    }

 

  }

   }

   }

   if (Push_Button)

  {

  if (alarm_armed == 0)

  {

  alarm_armed = 1;      //Arm the alarm system

  Wait_1minute();        //If armed, wait for 1 minute before going into alarm mode

  

  for(i = 0; i < 60; i++){  //If armed, Blink the Status LED for 1 minute before going into alarm mode

      Status_LED = ~ Status_LED;

      Delay_ms(1000);

    }

    Status_LED = ON;   //In alarm mode, switch ON the status LED

  }

  else

  {

  alarm_armed = 0;      //Disarm the alarm system

  Siren = OFF;        //Switch OFF the siren

  Status_LED = OFF;   //Switch OFF the status LED

  }

 }

}

}

 

[Kiriro]

hye firdaus , from ur coding , it seem like its already correct . it maybe problem between ur pic and gsm.. and i dont clearly understand ur project without a schematic . do provide it . I think ur problem is because PIC provide 5v and Most GSM operate in 2.8v to 3.9v . both device cannot comunicate and if u do directly from pic to gsm . it may broke ur gsm . so i suggesting u use LOGIC LEVEL CONVERTER ( LC04A) . it just 2$ . and remember to use TTL pin in ur gsm and not using serial comunication pin . in my gsm ( sim900a) the ttl pin have 6pin … the two top provide 3v , middle is 5v . and bottom is GND and VDD .  when ur using LOGIC LEVEL CONVERTER .  use 3v TTL pin Gsm to LLC LV . and 5v from pic to LLC HV.  '-' on both lv and hv should be in the same GND.  for more detail contact me .

[firdaus]

sir, how can i contact with you? because this scematic maybe should not have here because i afraid with copyright reason.

[Author]

Posts