Three Kinds Of Access To Internet Solutions

With the development of network, communication and computer technology, realized the TCP/IP protocol in the embedded system, remote data can communicate through INTERNET. Recently, much application based on it had become broad attention.This paper is based on the embedded TCP/IP, we introduce three technologies:RS232, 2. 4GHz wireless technology and LonWorks field bus access into INTERNET.First, this paper analyzes these access projects, complete the hardware design of the 2. 4GHz wireless communication module and the design of periphery assistant function circuit, complete the hardware design of LonWorks module, complete SPI interface between the wireless module/LonWorks module and the embedded TCP/IP hardware platform.After we have designed the whole hardware modules, this paper begins to analyze the requirement of the software system, including the driver of RS232, realizing of communication protocol, internet applications and Human Machine Interface (HMI). We complete the multicast between wireless modules, communication between wireless module/LonWorks module and embedded TCP/IP, complete the HMI based on IE Explore and Intouch software on the remote PC, at last, the whole system can run reliably.These access projects, realized the interconnection between the RS232 and Ethernet, between the wireless network and the lineate network, between the control network and the information network.These tenologies is the extended application of embedded TCP/IP, exert each advantage, more application are supported based on it,therefore,these technologies have better performance and wide apply foreground.