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16-03-2010, 06:38 AM
Post: #1
APPLIANCES CONTROL THROUGH SMS full report

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APPLIANCES CONTROL THROUGH SMS



Abstract
This project is designed to make home automation easy to control when a user is not at home. The project is designed to allow easy use of a mobile phone to control appliances in the home. Using a mobile phone the development of the control system will be carried out using SMS. This will communicate with another mobile phone, which in turn controls the devices attached to microcontroller modules. When the action has been carried out then a response is sent to the user. The project involves three main areas, research, development\programming, testing and the writing of the report.
Introduction
The project is aimed at developing and testing the use of mobile phones to remotely control an appliance control system. The microcontroller would then control an device based on the information given to it. The proposed solution will need to be easy to use, simple, secure, robust and be useful on most mobile phones. To achieve this testing will need to be carried out to create a useful system.

The report consists of a background into the area of 8051 microcontroller and mobile communication, how they are interfaced to each other and AT (Attention) commands set used in communication.
HARDWARE USED
1. AT command supporting GSM mobile phone.
2. 89S52 Microcontroller
3. Max 232 IC.
4. Relays
5. Relay driver IC ULN 2803
6. Voltage regulator 7805.
7. Diode IN4007
8. GSM Phone
SOFTWARE USED

1. Keil u-Vision 3.0
Keil Software is used provide you with software development tools for 8051 based microcontrollers. With the Keil tools, you can generate embedded applications for virtually every 8051 derivative. The supported microcontrollers are listed in the µ-vision
2. PRO51 Programmer Software
THEORY OF OPERATION
In this project we interfaced 8051 microcontroller with Motorolaâ„¢s C168 GSM mobile phone to decode the received message and do the required action. The protocol used for the communication between the two is AT command.
The microcontroller pulls the SMS received by phone, decode it, recognizes the
Mobile no. and then switches on the relays attached to its port to control the appliances. After successful operation, controller sends back the acknowledgement to the userâ„¢s mobile through SMS.
AT-Command set
The following section describes the AT-Command set. The commands can be tried out by connecting a GSM modem to one of the PCâ„¢s COM ports. Type in the test-command, adding CR + LF (Carriage return + Line feed = \r\n) before executing. Table gives an overview of the implemented AT-Commands in this application. The use of the commands is described in the later sections.
AT-Command set overview
Command Description
AT Check if serial interface and GSM modem is working.
ATE0 Turn echo off, less traffic on serial line.
AT+CNMI Display of new incoming SMS.
AT+CPMS Selection of SMS memory.
AT+CMGF SMS string format, how they are compressed.
AT+CMGR Read new message from a given memory location.
AT+CMGS Send message to a given recipient.
AT+CMGD Delete message.
A BRIEF INTRODUCTION TO 8051 MICROCONTROLLER:
When we have to learn about a new computer we have to familiarize about the machine capability we are using, and we can do it by studying the internal hardware design (devices architecture), and also to know about the size, number and the size of the registers.
A microcontroller is a single chip that contains the processor (the CPU), non-volatile memory for the program (ROM or flash), volatile memory for input and output (RAM), a clock and an I/O control unit. Also called a "computer on a chip," billions of microcontroller units (MCUs) are embedded each year in a myriad of products from toys to appliances to automobiles. For example, a single vehicle can use 70 or more microcontrollers. The following picture describes a general block diagram of microcontroller.

89s52: The AT89S52 is a low-power, high-performance CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory. The device is manufactured using Atmelâ„¢s high-density nonvolatile memory technology and is compatible with the industry-standard 80C51 instruction set and pinout. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory pro-grammer. By combining a versatile 8-bit CPU with in-system programmable Flash on a monolithic chip, the Atmel AT89S52 is a powerful microcontroller, which provides a highly flexible and cost-effective solution to many, embedded control applications. The AT89S52 provides the following standard features: 8K bytes of Flash, 256 bytes of RAM, 32 I/O lines, Watchdog timer, two data pointers, three 16-bit timer/counters, a six-vector two-level interrupt architecture, a full duplex serial port, on-chip oscillator, and clock circuitry. In addition, the AT89S52 is designed with static logic for operation down to zero frequency and supports two software selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port, and interrupt system to continue functioning. The Power-down mode saves the RAM con-tents but freezes the oscillator, disabling all other chip functions until the next interrupt

The hardware is driven by a set of program instructions, or software. Once familiar with hardware and software, the user can then apply the microcontroller to the problems easily.

The pin diagram of the 8051 shows all of the input/output pins unique to microcontrollers:

The following are some of the capabilities of 8051 microcontroller.
Internal ROM and RAM
I/O ports with programmable pins
Timers and counters
Serial data communication
The 8051 architecture consists of these specific features:
16 bit PC &data pointer (DPTR)
8 bit program status word (PSW)
8 bit stack pointer (SP)
Internal ROM 4k
Internal RAM of 128 bytes.
4 register banks, each containing 8 registers
80 bits of general purpose data memory
32 input/output pins arranged as four 8 bit ports: P0-P3
Two 16 bit timer/counters: T0-T1
Two external and three internal interrupt sources Oscillator and clock circuits.
BLOCK DIAGRAM:

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05-03-2011, 04:19 PM
Post: #2
RE: APPLIANCES CONTROL THROUGH SMS full report
Hi sir/friend,,thanks for u r information... but i need more complete details on this project so will send me some more details...pls i need very urgent....pls pls pls....my mail id is v.shalini941[at]gmail.comHuh
06-03-2011, 10:48 PM
Post: #3
RE: APPLIANCES CONTROL THROUGH SMS full report
From the report, we see that the SMS is sent from the controller's mobile to the mobile phone connected to the home appliances. The details you should know when going ahead with the project are:
-about AT commands which are included in the GSM specification. Almost all phones support this AT commands. The commands to control the device are transmitted to the end mobile phone as AT commands.

The AT (Attention) commands set used in communication is covered in the report and more you can learn from the net.

-Microcontroller programming
The message recieved by the end mobile phone is taken by the microcontroller and decoded to fetch the AT command sent by the user. Then the microcontroller will switch the devices on and off by controlling the relays. The programming is simple and if you have basics of C/C++ programming, you can write the code easily. The requirements of the program are available in the document.

This is also a related topic:
http://www.seminarprojects.com/Thread-sm...iances-and
http://www.seminarprojects.com/Thread-sm...?pid=15456
21-07-2011, 03:42 PM
Post: #4
RE: APPLIANCES CONTROL THROUGH SMS full report
please send me the circuit diagram of sms and telephone controlled home appliances in my gmail account.
18-01-2012, 09:37 AM
Post: #5
RE: APPLIANCES CONTROL THROUGH SMS full report
to get information about HOME APPLIANCES CONTROL THROUGH PC full report ,ppt and related topic refer the link bellow
http://www.seminarprojects.com/Thread-ho...through-pc

http://www.seminarprojects.com/Thread-ap...ull-report

http://www.seminarprojects.com/Thread-po...through-pc

http://www.seminarprojects.com/Thread-co...%E2%80%99s
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