Final year degree project for engineers Final year projects based on microcontrollers
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at89c2051 motor controller and other light projects
Tutorials of microcontroller 8051, A step by step easy to use self learning rapidex

Monday, August 8, 2011

microcontroller 8051 security alarm based system circuits GSM based Home security system hidden cameras

GSM based home security system project using microcontroller 8051.

This technical post is actually a tutorial on how to interface gps or gsm module with a microcontroller for different applications like security, control and monitoring, or home appliances control etc.

 Main aim of this project is to provide sms based tracking of different locations in the home while you are not at home.This project can also be used to monitor the different signals conditions of the machines in factory or industry. A GPS module will be installed in the home which will transmit the status of different doors continuously after short intervals or when the status of any signal is changed. Location will be sent as a sms through gsm network. These messages will be received by another GSM module situated at some remote location. The purpose of this project is to monitor and control electrical devices (Analog and Digital) remotely using GSM modem/phone. The GSM modem provides the communication mechanism between the user and the microcontroller system by means of SMS messages.
User can have the condition of various signals attached at multiple electrical devices by receiving suitably formatted SMS message from the microcontroller based control system. These SMS commands are interpreted by microcontroller system and are transmitted to other remote mobile.
Function and methodoly of GSM Based Route monitoring and security system.
There are eight input devices attached to microcontroller, the input devices can be extended to 32 depending upon the need. But currently it has only eight inputs. The inputs can generated from from rad switches, IR transmitter and receiver or other magic switches. For security these should be implemented in such a way that these should be hidden. When any of the door is opened, corresponding switch is operated, microcontroller is continuously monitoring all eight switches, on finding the changed in status of the input from door, the microcontroller turns ON the security alarm for a few second. On the same time a SMS is sent to the remote mobile about the latest situation of the home security.
If no other switch is operated (door is not crossed) and door is re-closed on the alarm, then the security alarm will be OFF otherwise it will be ON repeatedly and do send SMS continuously to owner about home or office security.

The major building blocks of this gsm based project are:

1. Microcontroller based control system with regulated power supply.
2. GSM Modem/phone.
3. Digital and Analog sensors and controlled devices.
GSM based security system using microcontroller 8051

Above is the circuit diagram of home or office security system. We can see that system has TEN LEDs attached to microcontroller. These LEDs can serve two jobs. One is ofcourse indication and the second is "we can attach any external device with these signals like bulb or camera, or any suitable device using proper optocoupler and relays.
First LED is flashing led, which is an indication that the system is running smoothly. The second LED is for alarm against security problems, remaining eight LEDs can be used for controlling cameras in each room to take snaps of the person who has un-authorised access to that room.
Thus we say that this GPS based camera controlled security system for home or offices.
CODE of the GPS based camera controlled security system using microcontroller AT89s51 is written in keil C51 microvision 4.

Download software/ code written for microcontroller 8051 to interface security alarm based system circuits GSM based Home security system hidden camerasInterfacing security alarm based system circuits GSM based Home security system hidden cameras

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circuit diagram for emergency vehicle tracking using pic16f877a


  1. Hi,

    Could you please help me in doing a project using 8051 microcontroller which acts as a fire and a burglar alarm(using ir sensors or to detect motion)? Please do let me know soon



  2. @ Asha
    How many sensors for fire and motion detection you want to use in your security project of home or offices using microcontroller.
    Please send me complete proposal of your project, i.e, what you have decided and presented to professors in university.
    what kind of sensors for fire you want to use?
    if nothing is decided or cleared sofar, then do not worried about it, we can make a good proposal of your project by mutual discussion , you can send me e-mail, also, my MSN ID is given on this blog.

    1. pleas help this project? In this project in which block diagram?

  3. sir,
    i want to do a project on the topic "microcontroller 8051 security
    alarm based system circuits GSM based Home security system hidden
    cameras".here i want to send mms instead of sms to owner .plz send me
    the circuit diagram,component,coding.related to mms.

    i would be highly grateful to you if you kindly help me on this topic.

  4. @ rabindra biswal :-

    I have not any project in which mobile is interfaced with microcontroller for the sending of MMS.
    So, I can not provide you circuit diagrams and code regarding MMS sending from mobile and microcontroller.

  5. Hi,
    First of all i'm really happy to read you're blog and it helps me in my study so thank you for that..
    I'm looking for the project in which i want the security lock system..
    in it i'd like to use components like LCD , 8051 processor, Keypad Etc..
    I hope you can help me out..i'm waiting for you're positive reply as soon as possible..

  6. @ golf clubber :-

    Thanks for reading the blog and liking the projects on it.

    I have not uploaded the project, you are asking so far.

    But iin near future i will develop a digital lock based on microcontroller 8051 and having LCD with keypad interface.

    So that you can get idea from it anf develop your own microcontroller project for digital lock control system.

  7. YV Ong (for GSM PIC Car parking)September 17, 2011 at 10:08 PM

    Dear Sir,

    Hi, I'm going to do my final year project total. "GPS-Assisted Car Parking System" is my title. This project is wants to let the vehicle to park in suitable place without driver. We will give the instruction to the vehicle. I will use GPS, PIC, ultrasonic sensor and so on to apply on my project. So, sir do you have any idea on this project? How to connect the GPS with the vehicle and the car park lot?

    Best Regards,
    YV Ong

  8. @ YV Ong (for GSM PIC Car parking) :-

    I have not worked on the interfacing of GSM with microcontroller.
    So, if you have any progress regarding the interface of GSM with PIC, share with me.

  9. Is ADC is required for wireless video transmission?

    Mr.Anonymous i can not understand , why people hide their names while asking questions.
    Why people not ask the complete question?

    like ur name, ur question is also Anonymous.

    ask complete question and send me files of circuit diagram of video transmitter and details, then i will reply. ok

  11. sir,,
    myself saurabh,, 2nd year
    I trying to do a dammmnnn simple task but it is not getting done...
    what i want is that ki send AT command to GSM modem, and then the recieved OK is displayed on lcd..

  12. @ saurabh :-
    send me your circuit diagram and code, then i wil check it.
    my e-mail id is given on this web-blog.

  13. saurabh shandilya (GSM mobile interface microcontroller)October 18, 2011 at 11:29 PM

    myself saurabh, 2nd year student. i want your help regarding a basic step of my project i.e. i want to use GSM in my wat i am trying to do is to send the AT command to the GSM via my microcontroller and then the recieved OK is to displayed on the screen...
    my lcd is initiallised already but still it is not displaying the OK text...
    can u tell me what possible faults i may be doing...
    saurabh shandilya 2nd year
    delhi college of engg.

  14. @ saurabh shandilya (GSM mobile interface microcontroller) :-

    No, I can tell you where the problem is in communication without examin the program written for microcontroller.
    So, if you want help from me on this project of interfacing GSM with microcontroller and displaying text on LCD, you should send these two things:
    1. Circuit diagram (should be designed in proteus isis and all files related to it)
    2. Code or program you have written sofar (all files related to it in zipped format).OK

  15. hi,
    am james,
    i want to connect a buglarm alarm to a microcontroller then interface with a gsm modem, so as an owner can rceive a call or an sms when an intruder is breaks in a his premise. i would appreciate much if you would send me circuit diagram of the same and the program. i will highly appreciate any assistance of the same.

  16. @ njoroge or james (connect a buglarm alarm to a microcontroller & GSM modem) :-

    Your Project of interface GSM modem with microcontroller 8051 for security system of CARs or vehcals is a nice idea and you can develop this project very easily if you try concentrate on my post on the topics related to interface of mobile phobes with microcontrollers or control machiines through GSM modem and microcontrollers.
    You should try it my your own instead of asking me to send the circuit diagram and code.
    what i can help you is, i can guid you in your code or circuit designing where you are stuck or confused or feel problems, but to provide all ready made work to some one is not justified.

  17. Hi, Sir i have a project for our our final year,my project is all about sms controlled irrigation system. Where in my main goal is to turn on and off the water pump. I don't know where to start. I really don't know how to connect the gsm modem into the mcu. I am using eGizmo GSM/GPRS modem and for my microcontroller is Gizduino. Any suggestion sir?

  18. @ Naef ( Plant irrigation System based on GSM GPRS Gizduino microcontroller):-
    Sorry, I can not understand your comment, is it just information OR, is it order OR is it request to help. Nothing is conclude from it.
    Do you want spoon feeding?
    Do you want to discuss some technical points , problems with me?
    OR Do you want help in software?
    Do you want help in circuit designing?
    Do you want some ready made solution of it?
    Please write clearly

  19. hi sir
    tis is hardik patel. I want ur help in making project of home security system with gsm modem using sensor not using led or cameras, so can please help me in making my project

  20. hardik ( home security system with gsm modem ):-
    Yes help can be provided in this project, write in detail what you want?

  21. Good Day sir, I'm elben..I need your help sir for my project with gsm that when I send a message to the GSM the IR will "ON" and the same time the GSM will send a confirmation to the sender. I am making a GSM Based Car Security System.. This my first time to make this project with GSM.. Tnx in advance..

  22. dear sir , i am AMEY KAMAt , BE ETC student, GOA
    we r doing project on gsm operated robot, but here we r going to use 3G to see the area around the robot/guard.
    our planning is that, we aill use a sensor to detect if any theif passes frm d door , once sensor detects this , that microcontroler wil make a call to the owner as an indication that when call is established the owner wil b able to see whats going on in his house....
    pls help me how can i make the microcontroller call the owner...what is the idea? how to do this? i jus hav this much idea bt idont knw anything about how to do it...

  23. Sir,
    I'm new to programming with microcontrollers.. Can you please help me with the c language code and circuit diagram of an electronic keypad lock that asks the user to input a password and displays message on LCD whether the password is correct or not!
    This GSM based home security system is very complicated and tough for me, I want to start from basic microcontroller programming..
    Your help in this regard will be highly appreciated..
    kindly mail me at
    thanks in advance..

  24. hello can you help my to do an home alarm system in microcontroler easy8051a with microprocesor AT89S8253

  25. hi sir dis is vasu from jntuk
    i want to do project on gsm based home security system can u help me in suggesting ckt diagram of dat

  26. @ elben (Car security system using GSM and microcontroller):-
    You are doing a nice project, have you develop circuit diagram or not?
    If you have develop circuit diagram and written some code, then please send me these things so that i can check and find out where the problem is.
    OR you have done nothing then tell me what exactly you want from me??
    Tell exactly what is ur area of dificulty?

  27. @ AMEY KAMAt (gsm operated robot):-
    You are doing interesting project.
    but you have not mention about which microcontroller and gsm or 3g you are using???
    ok any way, i suggest you to finalize the gsm modul and then search and study uts data sheets, there would be some commands on GSM to call a particular number from its list. this will solve you problem. if you donot find the information like above then directly contact the menufecturer of GSM maduls about this option.

  28. @ shafqat (Microcontroller project):-
    Your idea about learning the microcontroller is nice, i have added you in my yahoo messenger, so try to catch me on yahoo, i will guid you about how to develop the microcontroller project by your own.

  29. @ beni (Home alarm system):-
    Yes, i can help you develop a home alram system using microcontroller, write about the details of your project and its functionality you want to achive from it. if you can provide circuit diagram it will be more helpful to guid you.

  30. @ vasu (circuit diagram of home security system):-
    yes, i am here to help students in their degree projects, but not this kind of help that a ready solution.
    you should find and learn, if you feel some difficulty then discuss that particular problem with me, if will guid you.

  31. Sir
    I'm Kiran doing my final year.Our project is GSM based Electronic house.We have information about electronic house
    Can you give information how to implement it with GSM using microcontroller?


    1. This is an informative post review. I am so pleased to get this post article. I was looking forward to get such a post which is very helpful to us. A big thank for posting this article in this website. Keep it up.

      Alarm Monitoring

  32. Hello to all, my name is Elijah. I am a BTech Electronics Engineering final year student and yes it is time for final project and am requesting for help. I am looking at two projects (1)power energy saving management using ARM MIC or PIC24 or Dspic33 and two (2) Hyrachical Home security using same microcontroller as in the first project.

    Could some one help me with writting a code in c/c++ because am only good at assembly and this is going to be crazy for me to do the coding.

    Thank you very much

  33. @ Kiran ( GSM based Electronic house):-
    No, things are not that simple , you people take.
    Go step by step and asks what you feel difficult or not understanding.

  34. HI every one at this moment i require a bank locking system project with gsm module.dfat should send sms to the owner when door is opened

  35. Hi,
    Can u please provide me ur sample synopsis of the above project to
    I am in a very urgent need of this, so please do the needfull ASAP..Please dont mind

  36. hi sir
    my project topic is smoke alarm system when alarm trigger it can send message or call i need help for this project for designing circuit diagram and the code

  37. Hello sir,
    my project is low cost solar inverter with solar charger based on microcontroller.I want to write the coding in c language for the charger circuit where am using 8051 for this purpose.Can u plz help me?

  38. Hello sir,

    I have a question related to the project you have shared here.I want to modify my current project which is similar to this and want to know
    : when an intruder crosses a trigger signal is generated.Is it possible to program 8051 to receive this trigger signal and send it through bluetooth to a pc ?is any free code for the same available online?

    I want to know how can we send the trigger message to a pc wirelessly from a microcontroller.

    Thank you for your help and time!

  39. Good morning sir,
    Am Susan could there be any devices that work better than the micro controller 8051 that i can use for the GSM based home security system

  40. Respected sir
    I want a project based on 8051 with i can control a car using mobile . I want the cke diagram components & coding of this project.

    Ravi Mittal

  41. dear please send me your project of GSM based home security system project using microcontroller 8051.
    i need circuit diagram as well as component value,i hope u will send me ,my email add is (


  42. dear,i want to do this project of GSM based home security system project using micro controller 8051.please send me circuit diagram as well as component value of this email address is (

  43. sir i will check the same circuit and program in above
    but don't see any (clear) message in the Virtual Terminal screen.some unknown symbols are displayed ..why ...
    please Replay me (

  44. sir i also have another Quires about gsm modem and AT command. my friend told me all the AT commands not suitable for all gsm modem if its true or not.. above coding's are suitable for all modem.?
    please replay me

  45. @ slatheef from Maldives :
    Added in Gtalk for live discussion.ok

  46. hi Dr Rana..Im currently doing a project on PIR security system and i have only managed to send an sms to the user using a GSM module. is there any way that i can improve my project so that it includes a camera chip so that it can send an image via mms to the user ?? please help.

  47. hi..i'm fahmi..
    i want to do project design of ethernet based reote monitoring and controlling system for home security...using silicon labs..the board is c8051f340...i'm using magnetic sensor to send signal to the ethernet and the board...can u write the c code for this program?...

  48. dear sir
    This is selva
    Basicaly I am a mechanical studeant now am doing a 89c51 with gsm modem (sim300) used motor monitoring system i need 2 call command and 3 msg command
    I dont know to create a c sorce file
    For keil 4
    Will you please help me sir
    My e mail id is

  49. sir we need flow chart of this project

  50. hello Dr.I am a final year student of Northumbria University and i have a final year project to design a home alarm system using pic16f887. Please i need your help as i am to submit this by 25th of this month. Here is my email

  51. respected sir !!i m making project on security integrated system on wireless access protocol using gsm modem .i found a code on net but it does not include header files like gsm.h and eeprom.h.can u please help me??or rather u can send me a project on security system within 5 days!!watever charges mail me at for your reply

  52. @ Anonymous (asking for help on wireless security system based on microcontroller):-
    i have added you in Google talk and try catch me online, we will discuss your project live through chatting. or e-mail me what you have sofar and what are the problems you are facing in development of your security system integrated through wireless and GSM modem. indicate clearly where you find the code and circuit diagram, sothat i can check what exactly the problem you are facing.

  53. hi. Dr.Rana i want to use the gsm based security system at my home can u pls help me by sending the circuit diagram and full code for that thing plssssss......

  54. Hi Dr.Rana i want to use this gsm based security system in my home so can u pls help me by sending the circuit diagrams and original code for this as early as possible at i will be so thankful to u .....

  55. hi dr im a final year engineering student and i am interested in your project.. i want to make it as my final year project.. can you please send me full details in my email
    thank you.. please extend some help for me.. thank you very much

  56. hi Sir..
    I selected a microcontroller base Home Security as mini Project.
    So please sir Give me a full niformation (Circuit diagram,program and which component usefor It).
    Plz help me sir for It.

  57. Hi Sir
    I selected a mini project 'Microcontroller base Home Security'.
    So please sir give me the circuit diagram,progra and component which are use for it.
    plz help me for my project
    my ID

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    2. Alarm monitoring is the need of an hour whether or not you go out quite often. We might move out of our home for a weekend picnic or friends gathering and to make your home safe alarm monitoring security system Raleigh NC is required.

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    3. Alarm monitoring is the need of an hour whether or not you go out quite often. We might move out of our home for a weekend picnic or friends gathering and to make your home safe alarm monitoring security system Raleigh NC is required.

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  58. respected sir
    i want to do this project mentioned in your projects i.e microcontroller 8051 security alarm based system circuits GSM based Home security system hidden cameras....can you please provied me with th circuit diagram of the diagram that has all the details and list of components clearly specified..please reply asap sahll be very thankful to you

  59. Hi ! sir !
    I want to make gsm based home security system extende with home automation that have features : fire sensor,gas sensor,cctv camera & home automation
    so,please give me what are the components required,circuit diagram,project information

  60. Hi sir
    i have selected a project 'total home secourity system through gsm '. sir a new idea is secority is such as -fire secourity,thief secourity,flood secority,with bugger and sir tell me component list, programing 8051,ckt diagram.please send on my

  61. Delighted that I found your site, fantastic info. I will
    bookmark and try to visit more frequently.

  62. hi sir
    my name is sunday i tried to design with proteus for simulation ,,my project deals with gsm based automatic speed monitoring from the car..the problem is which component is used as speedometer in the proteus,,,and speed of the car are in which form(electrical form etc)


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  64. Hello there, i want to implement a gsm based security system using PIC 18f as a college project.What type of a gsm module is required? And are the fire and touch sensors etc are cheap enough.Furthermore, about how much time will this project take?

  65. Hello there...i want to implement a gsm based security system using PIC 18f as a college project...which gsm module will be required and what other sensors like fire,smoke and touch sensors would be required?

  66. hi sir
    i have selected a project 'total home secourity system through gsm '. sir a new idea is secority is such as -fire secourity,thief secourity,flood secority,with bugger and sir tell me component list, programing 8051,circuit diagram.


  67. Security Services are now available at your door step in order to make you safe. It is time that by implementing necessary security measures you do not fall prey to
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  68. Sir , Where is the function "puts" DEFINED??

  69. hi sir,
    I have a project about gas alarm(alarm by bell), and now, I want to develop the subject up to alarm via SMS, but I do not know how to connect the wires from the output of the sensor to the IC(8051) and from IC to GSM Module (nokia 6310i),please help me! my email:

  70. hello sir..i want to make a project on "GSM based home security interfacing with micro-controller 8051"can you please tell me the proper circuit diagram & code any report about it...send me on email

  71. what are the cts and rts pins? What are they located on and how is it set up? I have read and it is on the RS-232 is that true?

  72. Sir,
    im doing a home security project using pir,gas n smoke sensors. the owner should be notified via a call if either of them are triggerd. can u help me pls
    email -

  73. Hello sir
    Sir I want to add matrix keypad and RFID in this project of security system .
    I need your help to interface them

  74. Hello sir,
    I am arun from Jaipur,
    i just want to ask that there is one project micro-controller 8051 security alarm based system circuits GSM based Home security system hidden cameras. i have made that circuit but i am confuse that from where we give input to that circuit so my teacher will see that my ckt is in working position.

  75. amolirika for SMS or GSm modemFebruary 14, 2014 at 12:59 PM

    I\'m using a gsm modem to send sms to my mobile phone. sometimes when modem sends sms and receives for example \"+CMGS: 10\" my mobile phone does not receives anything until I turn off then on my mobile phone or someone calls me or sends me a sms, my mobile phone receives that missing sms sent by modem. I don\'t know what to do. what do you think? I need your help.

    1. @ amolirika for GSm and SMS controller using microcontriller 8051:
      Hi have you Checked with some other mobile or sim

      the error in commincation between mobile or modem with microcntroller with be confirmed using two different mobiles and modems any GSM type which support the circuit diagram and code listed above.
      Then e-mail me the results, after that we will conclude which is one is faulty, mobile, modem or microcontroller.

  76. Nikita Vasudeva for GSM modem with micro controllerFebruary 16, 2014 at 12:16 AM

    I am doing a project on home automation where in I monitor the temperature of a remote are. For that I am trying to dump my code into my NXP (P89V51RD2) micro controller to interface GSM modem with micro controller using PC and LCD . To achieve the same I am using flash magic as I don't have a programmer. A continuous error is being displayed when I start the process of dumping. It says "Unable to communicate(transmit/receive)".
    I have been using USB to Serial Converter(which consists of a DB-9 port), and I am dumping code for the first time. Now my project has come to a stand still, any help on the matter would be highly appreciate.

    1. @ Nikita Vasudeva for GSM modem with micro controller:
      slect right programmer for right device. also the configuration data cable also does matter.

  77. Sir,

    Myself MoahmedArif patel and am the student of BE 4th year electrical engineering. Am working on my final year project named "Phase Angle measurment using micro controller" . About the project i am taking current waveform from CT and voltage waveform from PT and then giving it to ZCD to convert into a square wave. sir i want to know , how can i make a programme into 8051 MC for this project.

    thanking you.


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So, send me your problems and pay money for solution.ok
This is comments section. Here you are requested to write your questions and problems about the microcontroller and electronics projects. Write the questions or comments in such a way that, it have all necessary information, so that i can understand and reply.If you want to send pictures and codes then e-mail me (
All comments will be highly appriciated.


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