Home Automation System with Mobile Communication and Computer Interfacing

Main Features of the projects:
The Home automation project is divided into two parts:

1. The electrical appliances with computer parallel port interfacing
2. The remote external on/off of the whole system

The first part contains a interfacing circuits which should be connected with the PC via a parallel port. The computer should need a high definition language such as C, C+, C++, QuickBasic, visual c, c# etc according to user’s choice. The program will define the address of the LPT port for the computer as well as function and status of the devices whether the devices are on or off.
The second part contains a setup which could turn on/off the whole system externally. Here we use cell phone as it is used widely in modern life. The setup contains a mobile set, a decoder and programmable microcontroller. The decoder will decode the signal from mobile to microcontroller and the microcontroller trigger the relay which is connected to the interfacing unit.
Objective/Task of the project:
The main objective of the project is:

• To generate and develop a circuit that will accept the signals from a computer interface via a port and control the switching of the relays which in turn will control the appliances running on mains power.
• To analyze and develop the instruction codes utilized by the interface to interact with the device using a high-level programming language.
• To design a DTMF decoder circuit which decodes the frequency of the button assigned to mobile phone.
• To connect the decoder with a PIC microcontroller and programming it with necessary condition.
• Finally Implement and combine the whole system.

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