PIR Sensor and GSM Based Home Security System using 8051 Microcontroller

Published December 29, 2015 65

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Author

PIR Sensor and GSM Module Based Home Security System

In this project, we are going to develop a PIR sensor and GSM based home security system. This project is developed using 8051 microcontroller. It can be used to detect any intrusion in houses and offices and send the alerts on cell phones. Let us know how to develop this system, step by step.

Required Components

8051
GSM Module
PIR Sensor Module
LM7805
Bread Board
LED
1K resistor
10K resistor
1000uf capacitor
10uf capacitor
10K
Crystal 11.0592 MHz
Power Supply

PIR Sensor

PIR sensors are used to detect living being movement. PIR is a Passive Infrared sensor, which detect infrared rays. All living being with a temperature above absolute zero emits heat energy in the form of radiation. These radiation are infrared ray. Human eye cannot see these rays because these rays are radiated at infrared wavelength. When any living being comes in range of PIR sensor, it detects heat of that living being and generate an output. PIR sensor module does not send any rays for detection, its only detects heat (Infrared). You can know more about PIR sensor in PIR sensor circuit.

PIR Sensor

GSM Module

The SIM900 is a complete Quad-band GSM/GPRS Module which delivers GSM/GPRS 850/900/1800/1900MHz performance for voice, SMS and Data with low power consumption.

GSM Module

AT Commands

AT commands are used to control GSM module. There are commands for calling and messaging that we have used in this project for sending message. After receiving AT Command GSM Module respond with OK which means GSM module is working fine. Here are some useful commands

ATE0 - For echo off

AT+CMNI=2,2,0,0,0 <ENTER> - Auto opened message Receiving. (No need to open message)

ATD<Mobile Number>; <ENTER> - making a call (ATD+919610126059;\r\n)

AT+CMGF=1 <ENTER> - Selecting Text mode

AT+CMGS=”Mobile Number” <ENTER> - Assigning recipient’s mobile number

>> Now we can write our message

>> After writing message

Ctrl+Z - send message command (26 in decimal).

ENTER=0x0d in HEX

Working

In this project we have used 8051 microcontroller for controlling the whole process of the project. A PIR sensor is used for sensing human presence. And when PIR sensor sense any movement in targeted area of room then it gives a HIGH logic to microcontroller and then Microcontroller take place and make a call via GSM module using AT commands. Controller calls to a predefined mobile number and at the same time it also sends a message to the same number via GSM Module.

Circuit Diagram

Circuit connections are shown in the above circuit diagram. GSM module’s Rx and Tx pins are directly connected to Tx and Rx pin of microcontroller And supply by using a 12 Volt adaptor. A PIR Sensor module’s Dout pin is directly connected at pin 21 (P2^0) of Microcontroller with a 10K pull up resistor. A 11.0592 MHz Crystal oscillator is used in this circuit for generating clock signal for microcontroller. And a 5 volt voltage regulator is used for provide 5 volt for the whole circuit.

Program Explanation

In programming, first of all we include header file and defines input and output pin and variables.

#include<reg51.h>

sbit PIR=P2^0;

After this we have created a function for delay.

 void delay(int itime)
{
    int i,j;
    for(i=0;i<itime;i++)
    for(j=0;j<1275;j++);
}

Here we have some function that we have used in our program. In this we have configure 9600bps baud rate at 11.0592MHz Crystal Frequency, and function for receiving. We are monitoring the SBUF register for receiving data.

void Serialbegin()
{
 TMOD=0x20;
 SCON=0x50;
 TH1=0xfd;
 TR1=1;
}

void Serialwrite(char dat)
{
  SBUF=dat;
  while(!TI);
  TI=0;
}

void Serialprintln(char *p)
{
  while(*p)
  {
    Serialwrite(*p);
    p++;
  }
  Serialwrite(0x0d);
}

After this in main program we have initialized UART and then we read the output of PIR sensor module. And if sensor gives HIGH logic to controller then microcontroller make a call with sending a message at the same time by using AT commands.

void main()
{
    //P2=0x00;
    Serialbegin();
    Serialprintln("ATE0");
    delay(50);
    while(1)
    {
      if(PIR)
      {
        Serialprintln("ATD+919821757249;");
        delay(1000);
      //  lcdcmd(192);
      //  lcdprint("Message Sending.");
        Serialprintln("AT+CMGF=1");
        delay(50);
        Serialprintln("AT+CMGS=\"+919821757249\"");
        delay(50);
        Serialprintln("Someone is Enter in your Place.");
        delay(50);
        Serialwrite(26);
      }
    }
}

Code

#include<reg51.h>

sbit PIR=P2^0;

void delay(int itime)
{
   int i,j;
   for(i=0;i<itime;i++)
   for(j=0;j<1275;j++);
}

void Serialbegin()
{
TMOD=0x20;
SCON=0x50;
TH1=0xfd;
TR1=1;
}

void Serialwrite(char dat)
{
SBUF=dat;
while(!TI);
TI=0;
}

void Serialprintln(char *p)
{
while(*p)
{
Serialwrite(*p);
p++;
}
Serialwrite(0x0d);
}

void main()
{
//P2=0x00;
   Serialbegin();
   Serialprintln("ATE0");
   delay(50);
   while(1)
   {
   if(PIR)
   {
       Serialprintln("ATD+919821757249;");
       delay(1000);
//   lcdcmd(192);
//    lcdprint("Message Sending.");
       Serialprintln("AT+CMGF=1");
       delay(50);
       Serialprintln("AT+CMGS=\"+919821757249\"");
       delay(50);
       Serialprintln("Someone is Enter in your Place.");
       delay(50);
       Serialwrite(26);
   }
}
}

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Please reply

Can I use 5v battery instead of 7805 .

Yes

doubts

i am planning to do this as my project...will it work out if i follow all the instructions here ...? and also i have only 1 mnth time,is it enough??

pir based security system

Yes you can make it. it will work fine.
and you time period is good enough for completing this project.

best of luck

Can i use more than one

Can i use more than one sensor in this project?what changes will have to be done if i use more than one sensor?

#include<reg51.h>

#include<reg51.h>
sbit PIR=P2^0;
sbit PIR1=P2^1;
void delay(int itime)
{
int i,j;
for(i=0;i<itime;i++)
for(j=0;j<1275;j++);
}
void Serialbegin()
{
TMOD=0x20;
SCON=0x50;
TH1=0xfd;
TR1=1;
}
void Serialwrite(char dat)
{
SBUF=dat;
while(!TI);
TI=0;
}
void Serialprintln(char *p)
{
while(*p)
{
Serialwrite(*p);
p++;
}
Serialwrite(0x0d);
}
void main()
{
//P2=0x00;
Serialbegin();
Serialprintln("ATE0");
delay(50);
while(1)
{
if(PIR)
{
Serialprintln("ATD+919821757249;");
delay(1000);
lcdcmd(192);
lcdprint("Message Sending.");
Serialprintln("AT+CMGF=1");
delay(50);
Serialprintln("AT+CMGS=\"+919821757249\"");
delay(50);
Serialprintln("Someone is Enter in your Place.");
delay(50);
Serialwrite(26);
}
if(PIR1)
{
Serialprintln("ATD+919821757249;");
delay(1000);
lcdcmd(192);
lcdprint("Message Sending.");
Serialprintln("AT+CMGF=1");
delay(50);
Serialprintln("AT+CMGS=\"+919821757249\"");
delay(50);
Serialprintln("Someone is Enter in your Place.");
delay(50);
Serialwrite(26);
}
}

you can use this code for two sensor..

pir sensor and gsm based security system

how to use code in 8051 and i used one and multiple sensor so, pls give me full information

Error message

here is what i got why building the code on mikroc
0 1 mikroc8051.exe -MSF -DBG -pAT89C51 -ES -DL -O11111114 -fo8 -N"C:\Users\Enoch\Documents\Mikroelektronika\Security system with PIR\Security System PIR.mcp51" -SP"C:\Users\Public\Documents\Mikroelektronika\mikroC PRO for 8051\defs\" -SP"C:\Users\Public\Documents\Mikroelektronika\mikroC PRO for 8051\Uses\ATMEL\" -SP"C:\Users\Enoch\Documents\Mikroelektronika\Security system with PIR\" "Security System PIR.c" "__Lib_Math.mcl" "__Lib_MathDouble.mcl" "__Lib_System.mcl" "__Lib_Delays.mcl" "__Lib_UART_Timer1.mcl" "__Lib_CType.mcl" "__Lib_CString.mcl" "__Lib_CStdlib.mcl" "__Lib_CMath.mcl" "__Lib_Conversions.mcl" "__Lib_Sprintf.mcl" "__Lib_PrintOut.mcl" "__Lib_Sprinti.mcl" "__Lib_Sprintl.mcl" "__Lib_Time.mcl" "__Lib_Trigonometry.mcl" "__Lib_Button.mcl" "__Lib_Keypad4x4.mcl" "__Lib_Manchester.mcl" "__Lib_OneWire.mcl" "__Lib_PS2.mcl" "__Lib_Sound.mcl" "__Lib_SoftI2C.mcl" "__Lib_SoftSPI.mcl" "__Lib_SoftUART.mcl" "__Lib_GlcdFonts.mcl" "__Lib_Glcd.mcl" "__Lib_LcdConsts.mcl" "__Lib_Lcd.mcl" "__Lib_RS485.mcl" "__Lib_T6963C.mcl"
0 122 Compilation Started Security System PIR.c
1 325 Too many initializers Security System PIR.c
14 318 Assigning to non-lvalue 'TR1' Security System PIR.c
20 318 Assigning to non-lvalue 'TI' Security System PIR.c
43 324 Undeclared identifier 'lcdcmd' in expression Security System PIR.c
44 324 Undeclared identifier 'lcdprint' in expression Security System PIR.c
57 324 Undeclared identifier 'lcdcmd' in expression Security System PIR.c
58 324 Undeclared identifier 'lcdprint' in expression Security System PIR.c
68 315 Invalid expression Security System PIR.c
67 402 ; expected, but '' found Security System PIR.c
68 424 '}' expected '' found Security System PIR.c
0 102 Finished (with errors): 24 Sep 2016, 12:23:25 Security System PIR.mcp51

asking

saddam your code giving error in this line #include<reg51.h> how can i right it?

request

please,can i get code by using 8051? thank you.

It is already developed using

It is already developed using 8051, please read carefully.

if you wont to use ATMEG328

if you wont to use ATMEG328 how can be use

sir, I am going to do a

sir, I am going to do a project almost the same as this one. I want to do the simulation in Proteus please send me the full proteus circuit diagram and the code by my email address.

best project!

Hello sir, can i remove the

Hello sir, can i remove the GSM module instead attach a fan with turns on & off on human detection.
kindly provide the code changes requirment for this.Thank you.

how to programme the 8051

how to programme the 8051 microcontroller
what device to use pls tell soon.sir
i want do some project

Check this one: Getting

Check this one: Getting Started with 8051 Microcontroller

gsm pir motion sensor with alarm

Sir,
I want to make a security system that's have 2 pir motion sensor, one alarm , and its send massage and call to three mobile numbers. Kindly upload source code for this project.

which compiler is used

Which compiler to be used to generate hex code.
Can you please provide the complete C program to compile and burn

Keil compiler is used to

Keil compiler is used to generate the Hex code. Check our 8051 section.

error while compiling

sir,
when i tried to cover the c code to hex code on keil v5
error
line (43): warning C206: ''lcdcmd' : missing function-prototype
line (43): error C267: 'lcdcmd' : requires ansi-style prototype
target not created

this is the error show , how to correct this error

Modified Coding needed. Current one sends continous SMS.

Hi,
I need little help on coding as the current one is giving a little problem.
When there is movement the PIR gives output which makes microcontroller sends signal to GSM module to send SMS.
Problem : it continously send SMS when there is continous movement after some delay!!!!

I would like the coding to send sms when there is first time movement and then it should stop sending sms even when there is continous High signal from PIR. It should again send SMS when PIR stops and then again send high signal.

Hope I have been clear on the above!!!. Waiting for the results from great programmer here.

Problem. Help needed in circuit. Sending SMS without input.

I made the circuit according to the circuit diagram and I just checked and found that even without PIR the Microcontroller is sending SMS throgh GSM???? I followed as per circuit diagram. Any thing to addup which I missed???
Further please check my other request where I need coding to send SMS only at input trigger.

Waiting...
Deepak

Hi Deepak,

You need to understand about the PIR sensor, please check this article about PIR sensor. First you need to reduce the sensitivity of PIR by using the Distance control knob and then you need to configure PIR in Non Repeatable Triggering Mode and set some time Time delay in PIR using Time Delay knob, to prevent sending repeated SMS. Also set some delay in 8051 Coding.

same problem to me

yes sir i chechked the article of pir and done according to that no sollution
a major problem is that when i am removing the pir sensor from the circuit still the microcontroller is sending high op to gsm and sms is comming to my no where is the error ?is there anything in coading is wrong ?

embedded system

Sir,
I want C programming of pir and GSM based home security system using AVR(atmega16).

Thank you

The microcontroller in your

The microcontroller in your instructible is quite different from the one in the circuit diagram. Why is that so??????....… why talk about 8051 and then you use AT8......?????

AT89C51 is a 8051

AT89C51 is a 8051 microcontorller.

sir i am doing this as project

sir i dont have time sir plz say me that how the AT COMMANDS are used and how can i dump in to module plz help me

#include<reg51.h>

i ca't verify this code #include<reg51.h>.
what shoul i do??

can you give me link 8051

can you give me link 8051 library to add in arduino library??

Software for this code

Which Software can i simulate this code ?

You can use Proteus to

You can use Proteus to simulate the code, you may also need to install GSM library in Proteus for GSM module.

pir sensor and gsm based security system

how to use (install) code in 8051 pls information in details i used 1,2,3 sensor so, how to use code for 1 sensor to multiple sensor

Check this article to:

Check this article to: Getting Started with 8051 Microcontroller

HOW I CAN GET THE BURNER? ARE

HOW I CAN GET THE BURNER? ARE U SOLD THE BURNER? CAN I BUY WITH YOU?

fathi.c(43): error C267:

fathi.c(43): error C267: 'lcdcmd': requires ANSI-style prototype...
i got this message..how i want to solve this problem? what code must added?

MSP430 + PIR

This is a very nice demonstration , congratulations on that part .
I am doing a college project that requires me to do the same thing as you have done but using mspp430 mc instead of 8051 . so can you please send me any instruction/changes/modification regarding the same ?
My email id is - [] , you can contact me there . Thanks in advance.

Doubt about the program

Sir,
you have written the LCD function calls in the main program without including the LCD header file. If I want to compile the program, do I get any errors corresponding to the LCD instructions. My doubt is "you didn't used the LCD in the project, even though you have written the LCD functions in the code". What is the necessary ? If you don't mind can you justify my doubt please...
Thank you sir .!

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PIR Sensor and GSM Based Security System

Required Components

PIR Sensor

GSM Module

AT Commands

Working

Circuit Diagram

Program Explanation

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