Design of outdoor air quality monitoring system based on ZigBee wireless sensor network

Abstract

An outdoor air quality monitoring system based on ZigBee wireless sensor network is presented in this paper. A wireless network is formed by coordinators, routers, terminal notes, and especially PPB (part per billion) level high precision sensors. Data, sampled and processed by terminal notes, are sent to routers or the coordinator through a serial port, then displayed on a screen of a PC. The concentration of CO, SO2, O3, NO2 and NO in the air can be observed online in real time. System architecture, hardware, and software are implemented based on ZigBee wireless sensor network. The whole system has high precision, low cost, and low power consumption. Also different sensors can be connected to network for extended functions and various fields.