Title: Design and implementation of a low-cost and multi-parameter indoor air quality detector based on IoT

Authors: Liang Zhao; Yujun Yao; Shuai Huang; Jieru Xu

Addresses: Hubei Key Laboratory of Intelligent Vision Based Monitoring for Hydroelectric Engineering, College of Computer and Information Technology, China Three Gorges University, Yichang, Hubei, China ' Hubei Key Laboratory of Intelligent Vision Based Monitoring for Hydroelectric Engineering, College of Computer and Information Technology, China Three Gorges University, Yichang, Hubei, China ' Hubei Key Laboratory of Intelligent Vision Based Monitoring for Hydroelectric Engineering, College of Computer and Information Technology, China Three Gorges University, Yichang, Hubei, China ' Hubei Key Laboratory of Intelligent Vision Based Monitoring for Hydroelectric Engineering, College of Computer and Information Technology, China Three Gorges University, Yichang, Hubei, China

Abstract: Nowadays, poor air pollution has become a leading environmental risk. Detection of indoor air pollutants may be more crucial than outdoor, because people spend nearly 90% of their time indoors. This paper proposes a low-cost and multi-parameter indoor air quality detector, able to measure seven significant indoor air parameters. Firstly, based on IoT concept, the system architecture of the proposed detector is introduced. Subsequently, by adopting modular method, the hardware circuit of various air parameter acquisition modules is designed. Then, based on I²C and UART protocol, the corresponding software programs for each module are developed. Moreover, the proposed system has been deployed in an office room of China Three Gorges University (CTGU) and stably operated for nearly a year. The test results show that the proposed system can accurately sense and reliably upload multiple air indexes including temperature, humidity, PM_2.5, PM₁₀, CO₂, HCHO and VOC, which is suitable for IoT applications like smart home and smart building.

Keywords: IAQ; indoor air quality; low-cost; multi-parameter; detector; IoT; internet of things.

DOI: 10.1504/IJCAT.2023.133879

International Journal of Computer Applications in Technology, 2023 Vol.72 No.4, pp.296 - 307

Received: 12 Dec 2022
Accepted: 28 Jan 2023
Published online: 04 Oct 2023 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article