A WiFi-enabled indoor air quality monitoring and control system: The design and control experiments

Particulate matter pollution becomes an increasingly important problem in developing countries and poses a hazard to human health especially in indoor environment. At the same time, modern buildings are equipped with advanced sensing and control technologies, offering control and optimization capabilities over a large range of parameters. This paper proposes an open platform of a WiFi-enabled indoor air quality monitoring and control system, which could be incorporated into such a ‘smart building’ structure. The complete software and hardware design of this system is presented, along with a series of control experiments. The proposed system operates over an existing WiFi wireless network utilizing the MQTT protocol. It is capable of monitoring the indoor air quality as well as controlling an air purifier to regulate the particulate matters concentration. Experiment results under a real world office environment demonstrate the effectiveness of the proposed design.