Rancang Bangun Sistem Pemantauan Kualitas Udara (CO2, NH3, Partikulat Debu PM2.5, Suhu, Dan Kelembapan) Dengan Sensor MQ 135, DHT22, Dan DSM501A Secara Real-Time Berbasis ESP32 Dan IoT

Ermasa Cintana Indah Sitopu (Universitas Diponegoro)
Arkhan Subari (Universitas Diponegoro)

GEMA TEKNOLOGI
Vol 21, No 4 (2022): October 2021 - April 2022

Declining air quality caused by human activities increases health risks, especially to the respiratory system. Gases like CO₂, NH₃, and fine particulate matter (PM2.5) are difficult to detect directly but pose significant health hazards, making real-time air quality monitoring systems necessary. This study designs a system based on ESP32 and IoT to measure the concentrations of CO₂, NH₃, PM2.5, temperature, and humidity in real-time using MQ135, DHT22, DSM501A sensors, and an RTC DS3231 module. Data is displayed on a dot matrix display and stored on the Arduino IoT Cloud platform. Testing shows that the system effectively monitors these parameters with good accuracy (sensor error rates: CO₂ 1.82%, temperature 3.33%, humidity 0%, PM2.5 8.17%). The system successfully provides accurate real-time data and facilitates further analysis, with potential for further development including automatic notification features and increased data logging capacity.