Energy Management System With Programmable Numbers using GSM

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The project aims at a system allowing user to control home based appliances through Sms along with acknowledgements. Here user need not switch home appliances on and off manually.
Our system allows user to operate these devices through sms, also the status weather the device is switched on or not is sent to user via a return sms. This can be used by domestic users and company users to operate as well as check status of home and company appliances from anywhere in the world.
It is a very convenient system for users since it allows them to easily control and monitor these appliances from anywhere. An example is that a person may switch on his House or office AC 15 minutes before he arrives so that he gets a cool environment as soon as he reaches there.
The system works in the following manner, the sms sent by user is received by the Gsm receiver and then sent to an 8051 microcontroller in order to process it. The microcontroller then activates the appropriate relay for that appliance and controls it.
User may also send an query sms in order to just get the status of an appliance. The query sms is returned to user with the status of that particular appliance. Also user may see all appliance status on an LCD display.