SMART HOUSE

The situation prevailing today always calls for people and property to be completely secure. In early days security was not of this concern. Advancement in every field and all walks of life has rendered the world with more of malpractice committed by a sect of people who are socially not unacceptable.

Nowadays in organizations, other than conventional means of security electronic security systems are a common feature. The devices provide a foolproof system from which everyone can feel highly secured. There are different kinds of gadgets provided Most of today’s security problems are solved by using GSM .

GSM (Global System for Mobile communications) is the technology that underpins most of the world's mobile phone networks. The GSM platform is a hugely successful wireless technology and an unprecedented story of global achievement and cooperation. Today’s GSM platform is living, growing and evolving and already offers an expanded and feature-rich 'family' of voice and multimedia services. GSM currently has a data transfer rate of 9.6k. New developments that will push up data transfer rates for GSM users are HSCSD (high speed circuit switched data) and GPRS (general packet radio service) are now available. Ultimate project for 21^st century. Now a day there is lot of burglary happening across the country. The reason behind this is the robbers are clear that the police can’t make out the exact time of burglary and also they can’t make out place where the burglary is happening.

For example there is device that will inform the police the robbery happened within 5 minutes of the burglary. The police can block the roads within 20 kilometers range and search for the robber’s .as the robbers cannot go away within 5 minutes out of 20 kilometers range. So keeping this in mind, we are designing a device that uses the latest mobile technology called GSM modem technology. One advantage in this technology is that any data to be transferred can be done without any wire communication that is the wireless communication. In recent days the communication used for conversation is the mobile communication. But in this project we will use for the security purpose.

SOFTWARES USED:

Embedded C, Keil demo version with simulator, express PCB and Express schematic.

WORKING PRINCIPLE: GSM (GLOBEL STANDARD FOR MOBILE COMMUNICATION).

This GSM technology is used for many applications like process control, security system, remote applications etc .Among this we are making a project on machine process control using this GSM modem. GSM modem is a device, which has all the protocol of GSM standards embedded into a micro controller and this function are controlled by standard AT commands of GSM technology .In this project we use an 89c51 micro controller, which belongs to the Intel 8051 family Architecture. This particular micro controller is wired to GSM modem through the serial RS 232 UART .,relays for controlling the Gate, input drivers to connect for the sensors and other accessories as shown in the block diagram.

The GSM with micro controller will be wired to the machine to some sensors like temperature sensor, door sensor, control and an emergency alarm or the main power switch. Whenever any sensors send an output, the GSM device will analyze according to what we have programmed and then it sends to the micro controller. The micro controller will check this command in the database and then sends the required SMS to the owner by connecting to the GSM modem connected to the micro controller. Or even it makes a call to the required person. If the person sends any SMS to the particular mobile the micro controller will receive it and then process according to the command. The main features of this project is that One relay can be made switch off and on a particular date and time . E.g. If we send the SMS “switch off the gate”, The SMS is sent through the network to GSM module .The GSM module will receive this SMS and the GSM modem will intimate the micro controller that it has received a message .The micro controller will send a request command to the modem to send the message with the sender phone number.

The micro controller will receive this data and first verify the phone number with master (owner) phone number .if it matches then it will compare the SMS with the stored SMS in the database. When any of the SMS matches then will see what function has to be carried out, once this SMS is received .If the function is to switch off the machine then it will switch of the machine .

GSM modem characteristics

Dual Band or Tri band GSM GPRS modem (EGSM 900/1800MHz) / (EGSM 900/1800 / 1900 MHz)

Designed for GPRS, data, fax, SMS and voice applications

Fully compliant with ETSI GSM Phase 2+ specifications (Normal MS)

General characteristics

Input voltage: 8V-40V

Input current: 8mA in idle mode, 150mA in communication GSM 900 @ 12V

Temperature range: Operating -20 to +55 degree Celsius; Storage -25 to +70 degree Celsius

Overall dimensions: 80mm x 62mm x 31mm / Weight: 200g

Interfaces

RS-232 through D-TYPE 9 pin connector

RJ11 voice connector

Power supply through Molex 4 pin connector

SMA antenna connector

Toggle spring SIM holder

Red LED Power on

Green LED status of GSM / GPRS module

Comfort GSM Module

The UCM/GSM provides a cellular phone connection to Comfort. This gives Comfort the following abilities;

1. Acts as a backup for alarm dial-out when the land line is faulty or cut.

2. Allows the user to dial to the GSM number instead of the land line to access Comfort menus. There is no voicemail on this line.

3. Allows Comfort to report alarms to the users cellular phones via SMS (Short Message Service).

4. Allows users to send commands to control home appliances and the security system via SMS.

Requires a SIM card to be inserted, just like with a cellular phone.

How?

The GSM modem is connected to the micro controller. This device will be wired in a house to some sensors like door sensors (PIR sensor movement detector), smoke sensor and an emergency alarm. Whenever any sensors send an output, the device (GSM mobile) will check it with its database and then sends the SMS or it makes a call to the required person.

EXAMPLE:

If some one opens the door forcibly, the device will dial the owner number or any number stored inside the controller and will send SMS to the owner.

Think your old parents are inside the house and some robber has entered the house. There will be panic switches wired in the house in all rooms. Who ever is inside the house can press the button, immediately the siren starts on and the device will start sending the SMS and start calling the numbers.Like this we can also have a medical emergency switch the device will call the family doctor and also send an SMS . where we can incorporate many functions as required.

COMPONENTS USED:

89S52-Atmel

Memory Atmel 24C04 4k EEPROM

LCD-Liquid Crystal Display 2x16

Power Supply Standard Type 5v DC

RS232 for Serial Communication

Buzzer-Iron Make Switch.

GSM modem

Relay / Panic switches.

LPG Gas leakage sensor

Fire sensor