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Remote Household Appliance Control System Using GSM
R. Chutia, D. Sonowal and S. Sharma Department of Electronics and Communication Engineering Tezpur Central University Tezpur, Assam, India GSM handset with GSM Modem and a driver circuit. The GSM modem provides the communication media between the homeowner and the system by means of SMS messages. The SMS message consists of commands to be executed. The format of the message is predefined. The SMS message is sent to the GSM modem via the GSM public networks as a text message with a definite predefined format. Once the GSM modem receives the message, the commands sent will be extracted and executed by the microcontroller. The system will interpret the commands and turn the appliances ON/OFF accordingly via the switching module. The detail description of individual modules in the system is as follows. A. User GSM mobile Handset Cellular phone containing SIM (Subscriber’s Identifying Module) card has a specific number through which communication takes place. The mode of communication is wireless and mechanism works on the GSM (Global System for Mobile communication) technology. Here, the user transmits instructions to the system to control the appliance in the form of SMS. Device 1 Device 2

Abstract— In this paper, we describe the design and development of a remote household appliance control system using mobile handset through GSM technology. The advantages of cellular communications like GSM technology is a potential solution for such remote controlling activities. GSM-SMS technology can be used to control household appliances from remote places. Remotely, the system allows the homeowner to monitor and control his house appliances via his mobile phone set by sending commands in the form of SMS messages and receiving the appliances status as well. This system provides ideal solution to the problems caused in situations when a wired connection between a remote appliance/device and the control unit might not be feasible. The system is wireless and uses the user’s mobile handset for control and therefore the system is more adaptable and cost-effective. The system uses GSM technology thus providing ubiquitous access to the system for appliance control. Index Terms— GSM modem, microcontroller, remote control, appliance control.

I. INTRODUCTION The rapid growth of wireless communication, motivated us to use mobile phones to remotely control a household appliance. In this paper we describe a remote appliance control system which can control different household appliances by sending an SMS message from a mobile phone. This controller is extremely handy at places where we have to control the ON and OFF switching of the devices but no wired connection to that place is available. The microcontroller would then control and 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. A remote household appliance control has been described in [1]-[4] using internet. A Bluetooth based home automation control is described in [5]. In [6] a GSM based system for home automation is described which uses voice commands for control. In [7] voice commands for home automation is being described. In this paper we describe a simple remote home appliance control using GSM SMS (Short Messaging Service).

UART Terminal

Microcontroller Board

Switching Module

Device N

Receiver GSM Handset (in the System)

User GSM Handset

Fig. 1 Block Diagram of the System

II. SYSTEM DESCRIPTION The system has two parts, namely; hardware and software. The hardware architecture consists of a stand-alone embedded system that is based on 8-bit microcontroller (AT89C51), a

B. Receiver GSM Handset This receiver GSM handset is used to receive the SMS sent by the user and then to transmit an acknowledgement or status to the user’s mobile. The receiver handset has to be equipped with an AT Modem and a valid...
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