Home Security Monitoring System Based On ARM And Wireless Ad Hoc Network

This paper set up a monitoring and alarm system, the system will be used in the familyfor monitoring the environmental of the house. The system based on STM32MCU andZigbee to solve the problem of the family. The system is established on the basis of theintelligent home furnishing.Nowadays, the development of wireless sensor network technology is swift， data fusiontechnology which based on Zigbee and MCU for data collection and processing are becomingmore and more common. At the same time, the research of Zigbee routing algorithm is also inconstant progress. But there did not have a optimal solutions to solve the problems about thebalancing nodes energy issues and the survival time of nodes. By studying the existing routingalgorithms, propose a new algorithm which named by G-LEACH that take-optimized oncluster head selection after in-depth study of the LEACH algorithm. There is a saving poweralgorithm which included in the new algorithms for the energy consumption of nodesbalanced, evenly distributed nodes, node survival time was extended.In this paper, the collected data by the sensors is processed by STM32MCU whichtaking Cortex-M3as core chips. There are some sensors just like combustible gas sensor,infrared anti-theft alarm sensor, GSM which can set massage for alarm. Through thecooperative of the sensors that in order to alarm when fire or break-ins by monitorenvironment of the family. STM32has30%faster than ARM7in operational speed, there areso many advantages in comparison with ordinary MCU which decision STM32is afficiencerthan ordinary MCU. So STM32can deal with the large data which generated by the ad hocnetwork and collected by the sensors.In this paper, an open oource operating oystem which called RT-Thread has beenembedded in the STM32MCU. There also have the detailed description how to carry out thecontext switch based on stack data, and how to carry out the context switch on stack datawhen External interrupt program arrival.