Research And Realization Of Smart Home Controller Based On Ethernet

With the rapid development of 4C technology (include computer technology, control technology, communication technology, CRT technology) and the constant improvement of living standard, smart home has been one of the most important branches in intelligent building. Smart home combines with architecture, network communication, information appliance and automation device. Based on the house platform, it is integrated with system, structure, service and management. It provides a high-efficiency, comfortable, safety and convenient living environment.This paper aims to design a cheap smart home controller for common family, including local control and remote control. It is used for controlling the operation status of house appliances, such as television, refrigerator, air condition, etc. The core-processing unit of smart home controller is an 8bit W78E58B microcontroller. Based on infrared communication technology, the infrared coding module NB9148 is used in the transmitter of local controller. The receiving terminal SJ1838 is used to decode the infrared time series. External interrupt and timer in W78E58B recognize the decoded signals. Then different appliances can be controlled in the house The hardware of remote controller is composed of W78E58B, Ethernet controller RTL8019AS and some other chips. The software is made up of simplified TCP/IP stack. These two parts are composed the embedded Web server in smart home. The simplified TCP/IP stack includes device driver program of RTL8019AS, the program modules of ARP protocol, IP protocol, ICMP protocol, TCP protocol and HTTP protocol. The embedded Web server of smart home can interact with CGI (Common Gateway Interface) dynamically based on HTTP protocol. So people can monitor and control the house appliances by browsers everywhere.At last, the smart home controller is tested in Ethernet. The testing result shows this...