Nowadays, the communication becomes very simple, fast ,interactive and more compact, that makes the global as a small village. So it is very easy of anyone to subscribe in the local or global telecommunication network with individual mobile phone device. Mobile devices such as mobile phones, are becoming multipurpose devices. These devices are capable of storing data as well as running custom application. As more people adopt these devices and begin to use them for personal and business task the need for controlling to the access to the data stored within the devices will become vital. With today’s and tomorrow’s wireless technology such as Bluetooth and G3, mobile devices will frequently be in close and interactive communication. Many environments including offices, meeting rooms, automobiles and classrooms already contain many computers and computerised application and the smart homes of the nearest future will have ubiquitous embedded computation. PC remote control with small device is a challenging topic of mobile computing. Enabling user to use data and function stored in/served by their home /office PC’s from anywhere with small mobile devices is beneficial because user can access the data at any time they want without caring heavy notebook. Furthermore user can control applications they want to keep running even when they are out. Several systems and methods have been proposed and developed for controlling remote PC with mobile phone. This paper represents a simple, practical and very low cost method which applies the SMS technique that is already available in all type of mobile phones devices and provide with modern mobile telecommunication networks. 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 a 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.
2. EQUIPMENTS USED
2.1 HARDWARE USED:
AT command supporting GSM mobile phone.
Max 232 IC.
Relay driver CIRCUITS
Voltage regulator 7805.
2.2 SOFTWARE USED:
Keil u-Vision 3.0. 8051 IDE
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 *
PRO51 Programmer Software
THEORY OF OPERATION
3. THEORY OF OPERATION
This project consist of two parts one is the hand held device called remote controller, the other one is a base station which control the appliances connected to it. The hand held remote controller is a mobile set from which a DTMF code can be send over mobile network to another mobile set. The mobile at the receiver end decodes the DTMF code and send it to the microcontroller based mother board. In this project we interfaced 8051 microcontrollerwith GSM Modem 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, decodes it, recognizes theMobile no. and then switches on the relays attached to its port to control the appliances.
4.1 CIRCUIT DIAGRAM:
Fig: 4.1: Circuit Diagram.
4.2 POWER SUPPLY:
4.2.1 Basic Principle Of...
References: 1. Mykepredko,Programming and Customizing the 8051-Microcontroller,Tata Mcgraw-Hill,1999
2. Ajay.v.deshmukh,Microcontroller [theory and application], Tata Mcgraw-Hill,2005
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