Wearable Smart Prototype for Personal Air Quality Monitoring

This work aims to present an advanced prototype of cost-effective wearable air quality monitoring equipment suitable for different use cases due to its small size, easy handling, and smartphone compatibility. In the paper, we present the chosen components and the system design. The prototype development is also presented, with the initial measurements and the aspects encountered during development. We used C and Arduino programming, Android software development. The proposed system comprises of an Arduino based microcontroller, a CCS811 sensor for volatile organic compound (VOC) measurement, a ZPH01 particulate matter (PM) detector, and an HC-05 device for Bluetooth connection. We investigated the prototype both in the laboratory and in a smart urban environment with different scenarios in Budapest, Hungary (street, campus, store, mall, underground). Also, the use of a smartphone connection for data loggings is presented. The paper shows examples of measurement results and the relation to similar results from around the world. The possible application in COVID-19 pandemic related questions is also discussed.