Design of Distributed Wireless Security Alarm System

This paper designs a intelligence wireless security alarm system based on MSP430 micro controller and nRF905 wireless transceiver module. First, it designs a wireless alarm terminal and formats a distributed wireless network based on TDMA. Alarm terminal adopts ultra low power MSP430F149 as MCU, and nRF905 as wireless chips. It designs the human body detector based on BISS0001, smoke sensor module based on smoke sensor MQ-2, valuables detector based on 315M wireless transceiver module, and personnel counter based on infrared photoelectric switch. The system can be widely used in various wireless monitoring domains.