The Design And Implementation Of Smart Home System Based On Wireless Sensor Network

Smart Home is the use of electronics, comm unications, automatic control, security technology to connect hom e facility together via network connection, for people t o build a healthy, comfortable, safe, convenient and efficient home environment, and it is also able to manage the daily affairs of the family efficiently.Currently existing smart home subsystems adopt different hardware and software communication protocols, its function is single and has no remote intelligent terminals. Some traditional sm art home systems uses a wired network approach established, maintenance and system scalability is poor. All this m ake it difficult to com pose of smart home system in the true s ense, and it is difficult to achieve a unif ied remote monitoring and centralized m onitoring. Smart home system can m ake up for deficiencies based on wireless sensor network.This thesis is organized within the family of wireless sensor networks based on ZigBee technology to develop sm art home systems. The system is com posed of sub-nodes, the central m anager, a communica tion network, the rem ote terminals. It combines wireless sensor technology, network technology, em bedded systems technology, research and developm ent of embedded computer based control center for smart home systems. The system uses wireless sensor networks CC2420 MCU chip and PIC18LF4620 child nodes of wireless to design sm art home system, including a memory circuit, power circuit, tem perature and hum idity acquisition circuit, combustible gas detection circuit and the solenoid valve control module. The main work is as follows:(1) The use of cluster topology, Z igBee technology is short-range, low-powe r communications technology, each node to achieve inform ation exchange, so as to achieve the coordination of the entire home network management functions.(2) Using CC2420 wireless sensor networks and PIC 18LF4620 microcontroller chips to des ign wireless smart home system node, and combining with the practical applications for each terminal node.(3) Sending commands to the con trol center via r emote terminal, to achieve intelligent home network remote control and management.The system possess a sm all volume, free wiring, remote m onitoring, easy maintenance and reliable operation characteristics compared with the traditional smart home system.