A design of fine particle concentration measurement system based on a near field wireless radio communication

Air quality decreases due to the increase in air pollutants generated by motor vehicles that have a negative impact on human health. Generally, the pollutants can be gaseous and particulate matter. PM2.5 are particulate matters having diameters less than 2.5 µm, respectively. This research was aimed to design a measurement system of PM2.5 concentration. A PM NOVA SDS011 and a microcontroller ATmega328P were used as the sensor and the processing system. The principle of the sensor was based on the change of the particulate concentration to a voltage. The particulate PM2.5 concentration was displayed on an LCD. The system was completed by a LoRa SX1278 module to data communication. The performance of the system was tested based on the ability to measuring PM2.5 concentration and data communication in a varied distance. The result showed that the system worked well in measuring the PM2.5 concentration in the range of 0-1000 µg/m3. The resolution was 1 µg/m3. The system can be used to measure PM2.5 with a distance of up to 200 meters.