16-03-2010, 08:03 AM
DEVELPOMENT OF WEB ENABLED EMBEDDED SYSTEM FOR HOME APPLIANCES WITH PASSWORD PROTECTED
ABSTRACT
Embedded systems are computational systems that use a combination of Hardware and Software, are dedicated to carry through specific tasks for specific applications. The market for these products or services is very large. Increased amounts of money and design resources are being thrown at these products and services. That too for Internet enabled embedded systems the market is very high. One significant portion of this trend is to embedded the Internet or, in other words, make embedded products that have the capability to connect to the Internet. Embedded systems are quite different from standard web servers. They have limited resources in terms of memory space and operating speed. Embedded systems usually work with a few kilobytes, to several megabytes of memory and operate upto 50MHz speed. Typical PCs have several gigabytes of memory storage and operate in the gigahertz range. Therefore, web servers are not really practical for embedded applications, but by using some suitable TCP/IP stack on the controller which works efficiently at the low operating speed of few tenâ„¢s of Megahertz. This project deals with the implementation of the Internet protocols on a Microcontroller so that the application can be enabled via the Internet.
This project basically consists of a PC connected to Internet using Ethernet and a control unit to control the appliances according to the received control signals from the user who is at distant place with his PC also connected to Internet. The control unit is designed using microcontroller which forms the heart of the project. The appliances are controlled through microcontroller with the help of their respective drivers.
According to this project, the user sends a message to a target PC with known IP address. The sent message resembles the control information of the appliances. The target PC receives the information and is given to the control unit being interfaced to it. According to the control information being received the microcontroller controls the home appliances.
