1. GSM BASED DEVICES CONTROLLING AND MONITORING SYSTEMS
Abstract:
GSM (Global System for Mobile convenience of SMS, this project lets you
Communications) is a low-cost hardware remotely control equipment by sending plain
equipment to create a system for remote text messages all of which can be pre-
monitoring and remote control. The system programmed into the controller and easily
can be controlled and monitored via Short remembered later. It can control up to eight
Message Service (SMS) from anywhere that external devices Short Message Service
covered by GSM (Global System for Mobile (SMS) is defined as a text-based service.
Communications) service. Devices that
connect remote monitoring and controlling The monitoring isalso done by
of fans, TV sound, tube light, climate, door interfacing a LCD to the microcontroller.
opening, closing and window’s and AT commands were used for controlling the
multimedia entertainment systems. In this functionality of modem’s(Global Systems
project we are going to develop an for Mobile Communication) is vastly used
embedded system, which will control all because of its simplicity in both transmitter
these devices with commands from a and receiver can operate at 900 or
Remote device through GSM (Global 1800MHZ band, faster, more reliable and
System for Mobile Communications) globally network. Here the system is capable
communication. of controlling the motor byr eceiving control
message from an authorized mobile number.
This controller is extremely handy
at places where we have to control the ON
and OFFswitching of the devices but no
wired connection to that place is available.
To implement this, a GSM modem is
connected to aprogrammed microcontroller
which would receive the SMS from a
reference cell phone. The control signal part
of the received SMSis extracted and is
compared with the messege written in
controller
The aim of this project is to control
i.e. to ON/OFF and speed control of
different motors, the electrical or electronic
appliances connected to this system from
anywhere in the world.For this purpose user
can use any type of Mobile. Thisway it
overcomes the limited range of infrared and
radio remote controls. Using the