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IoT System for Indoor Air Quality Monitoring Using ThingSpeak: Promoting Healthy Work Environments

Authors:
Ilber Adonayt Ruge Ruge
Ingrid Carolina Ortiz Álvarez
Fabian Rolando Jiménez López

Keywords: Air quality monitoring; ESP8266-embedded system; Internet of Things; ThingSpeak.

Abstract:
This article presents the development of an embedded system for air quality monitoring in enclosed environments, utilizing the ESP8266 microcontroller and the Arduino® IDE. The system integrates DHT11 and MQ-4 sensors to measure temperature, humidity, and CO₂ concentration, respectively. The collected data is displayed on an LCD screen and stored on a 4GB microSD card in Comma-Separated Values (CSV) format, ensuring easy access for further analysis. A DS3231 real-time clock module timestamps each measurement, enhancing data organization. Additionally, an alert system is implemented to log events when CO₂ levels exceed a predefined threshold. To enable remote monitoring, the system transmits data in real-time to the ThingSpeak platform using the ESP8266’s WiFi connectivity, allowing for interactive visualization and analysis. This implementation provides a low-cost, scalable solution for air quality assessment, facilitating decision-making in indoor environmental management.

Pages: 5 to 9

Copyright: Copyright (c) IARIA, 2025

Publication date: April 6, 2025

Published in: conference

ISSN: 2308-3727

ISBN: 978-1-68558-251-7

Location: Valencia, Spain

Dates: from April 6, 2025 to April 10, 2025