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The ultra-fine particles (PM 2.5 ), pollutants found in the air, are getting increasingly popular as they are found to cause serious damage to human body when inhaled or penetrated into the skin. Although there are public observatories to monitor air quality and alert people, they are usually available only in the vicinity of metropolitan areas. Even in urban regions, measured data are not spaced and sampled densely enough to serve individuals with proper data in spatial and temporal point of view due to high cost. In this paper, we design and implement a low cost fine-grained air monitoring system using LoRa WAn.We tested feasibility of LoRa Wanon metering system with large scale simulations. With densely deployed sensing devices on campus, our system provides fine-grained PM traces as well as reliable packet delivery while consuming significantly low energy.
Park et al. (Tue,) studied this question.