GSM modem for appliance control using microcontroller and mobile phone

Introduction of the controller Project

To control home appliance remotely there are various technologies and equipment are available in market around us and some of those are even in function in some houses. This project is also related to   this subject, but this project will have some unique features which would not be available in commercially sold gadgets. The most common basis of mostly available systems is that these workable only for short ranges and therefore have limited functionality. This limitation can be improved with use of some equipment which have larger range of application or which could be operated from a remote distance or using a device one become able to control something from a far distance from the machine under observation or control. One of the many options is one that involve use of the wireless communication technique like the GSM (Global System for Mobile communications). In this microcontroller 8052 project, we are going to use the GSM modem for sending and receiving text messages. The project is designed for seven home appliances initially which could be increase on any later stage to meet the requirement of a larger set of devices to be controlled. The 8052 Microcontroller is the heart of this project. The GSM modem will be interfaced to microcontroller 8052. The GSM modem will receive and transmit the messages for the sake of control of various device under commands of the microcontroller. The GSM network operators all over the world have roaming facilities, by this the user can often continue to use their mobile phones when they travel to other countries with same number. Therefore the user from any where in world can have direct access to his control system to control the appliance accordingly.

The microcontroller verifies for authentication of the number and, if the number is authorized, particular home appliance will be taken place or to be controlled like switched ON or switched OFF. An EEPROM is also interfaced to this controller system to store the home appliance position at every instant. This home appliance position information will not be deleted even in power failure conditions. Electronics components used in this project are very briefly listed below:

• The microcontroller 8052
• The GSM modem with associated components on circuit board.
• RS-232 serial communication device for voltage levels converter
• A keypad matrix for input to system;
• A 16 characters and 2lines, LCD is used to display various messages of the system.
• The TRAICs are used controller the various loads just like electronics switch or relays
• The opto-coupler MOC3021 are used to drive the TRIACs for controlling various appliance.
• The regulated power supply of 5v DC having current capacity about 1000mA  will be used.
• The voltage regulator IC 7805 which is a three terminal device will be ued to give regulated power supply to system.
• The Bridge rectifier for full wave rectification of DC from AC will be used with a step down transformer 230V AC to 12v AV.

 OBJECTIVE

     The main objective of the project is controlling the home appliances by using wireless communication system i.e., Global system for mobile communications modem (GSM).

DESCRIPTION OF THE BLOCK DIAGRAM

Block diagram of GSM based home appliance control System 

ADVANTAGES

1. System can be monitored and controlled from anywhere.
2. If required the Mobile number is changeable at system.
3. Home appliance status will not be lost in power failure condition.

APPLICATIONS OF GSM BASED SYSTEM

This system is developed for mobile reporting application only however It could be interfaced to personal computer system for advance application like utilization of data bases and complex functions through other applications, but it is limited to mobile use.

1. Process Industries.
2. Home Appliances

EMBEDDED SYSTEMS

The embedded systems are sum of software part and the hardware part of a project or system to perform a predefine special tasks. The central basic device of the embedded system is processor of course it could be a Microprocessors and a Microcontrollers. These appliances which have embedded control have a processor based hardware to meet the specific requirement of the application along with the its software which is executed by the processor. The embedded software is also called “firm ware”. The desktop PC and laptop are the general purpose computer not a perfect example of embedded system. The PCs are often used for a variety of applications such as playing games, word processing, accounting, software development and so on. Embedded systems are constrained for power. As many embedded systems operate through a battery, the power consumption has to be very low for embedded systems.

APPLICATION AREAS OF THE EMBEDDED SYSTEM

Almost every machine which have some automatic featured and and have electronics control in side it, then it will be using the embedded systems. The embedded  system  is in every daily like field like consumer electronics, office automation, industrial automation, biomedical engineering, wireless communication, data communication, telecommunications, transportation, military and so on.

CONSUMER APPLIANCES

At home we use a number of embedded systems which include digital camera, digital diary, DVD player, electronic toys, microwave oven etc. The embedded systems is also used in automobile industry for transmission control, engine spark control, air-conditioning, navigation etc. Even wristwatches are now   becoming embedded systems. Several robots and toys are embedded systems.

OFFICE AUTOMATION

The various appliance used in normal day to day office work have built in automation techniques and are using embedded systems in it like  copying machine, fax machine, key telephone, modem, printer, scanner etc.

INDUSTRIAL AUTOMATION

A lot of industries use embedded systems. These include pharmaceutical, sugar, nuclear energy, electricity generation etc. The embedded systems for industrial use are designed to carry out tasks like monitoring the temperature, humidity, voltage etc.

MEDICAL ELECTRONICS

All the patient monitoring equipment in medical industry in the hospital has an embedded system with them. These equipment include diagnostic instrument or device such as ECG, EEG, blood pressure measuring devices.

COMPUTER NETWORKING

Computer networking products such as routers, Integrated Services Digital Networks (ISDN), and Asynchronous Transfer Mode (ATM) are data communication protocols. A router interconnects 2 networks may be running different protocol stacks and function is to obtain the data packets, analyze the packets and send them towards the destination.

TELECOMMUNICATIONS

In the telecommunications sector the embedded systems have very dense use in subscriber terminals and network equipment such as key telephones, ISDN phones, terminal adapters, web cameras etc. The network equipment includes multiplexers, Packet Assemblers Dissemblers (PADs), sate11ite modems etc. IP phone, IP gatekeeper etc. are the latest embedded systems.

WIRELESS TECHNOLOGIES

The advancements wireless technology and mobile communications field has rapidly increased the use of embedded systems in the equipment in this sector also. The invention of mobile phone is the marvels of the twenty century. The mobile is a very good example of embedded system utilization which provides voice communication and many more. Similarly, many gadgets in this sector are very efficiently using the embedded system.

INSEMINATION

The all most all scientific and engineering fields have requirements of testing and measurement as a very fundamental need. The physical quantities requires the measuring equipment in laboratories such as weight, temperature, voltage, current etc. are all embedded systems. Test equipment such as oscilloscope, spectrum analyzer, radio communication test set etc. are embedded systems built around powerful processors. The measuring equipment we use in laboratories to measure parameters such as humidity, temperature etc are applications of the embedded systems

SECURITY

In the field of Security the embedded system is being widely used. We feel need to protect the homes and offices. Similarly we need to protect the information we transmit and/ or store. Security devices at homes, offices, airports etc. for authentication and verification are embedded systems. All most all the Encryption devices uses microprocessors that are manufactured end up in embedded systems. Embedded systems find applications in every industrial segment consumer electronics, transportation and industrial automation security etc. The embedded system are used to encrypt the data/voice being transmitted on communication links such as telephone lines.

FINANCE

In the Financial sector the dealing of cash and / or cheques is now reducing very rapidly, all the transactions are now carried out using smart cards and ATM (Automatic Teller Machine) machines. The Smart card, a credit card has a small microcontroller and memory on it which interacts with the smart card reader. The ATM machine acting now the electronic wallet.

keyword research

global system for mobile communication pdf ,What is the use of global system for mobile communication?, GSM is the most widely accepted standard in telecommunications 

global system for mobile communication ppt, GSM in Wireless Communication

GSM is an open and digital cellular technology used for mobile communication.

gsm architecture, Introduction to Global System for Mobile Communication

gsm network list, What is the global system for mobile communication architecture?

types of gsm, Global system for mobile communication (GSM) is a globally accepted standard for digital cellular communication, gsm architecture in mobile communication

What is global system for mobile communications standard?, Global System for Mobile Communication (GSM), gsm architecture ppt, The global system for mobile communication organizes the geographical area into hexagonal cells, the size of which is controlled, gsm architecture pdf free download, What is the example of global system for mobile communication?, Introduction to GSM - Global System for Mobile Communication