<![CDATA[In tropical countries such as Indonesia, thermal comfort in residential rooms, especially bedrooms, often receives insufficient attention. High humidity levels can cause discomfort and negatively affect health; however, most homeowners do not have access to simple, accurate measuring instruments. This study intends to develop a microclimate monitoring system based on the Internet of Things (IoT) to measure temperature and humidity in real time. The system was built using an ESP32 microcontroller and a DHT22 sensor, with data transmitted and visualized via the Blynk application. The prototype was tested directly in a residential bedroom to observe actual environmental conditions. The results show that the system operates reliably and provides stable real-time readings. During the ventilation test, room humidity decreased from 86% to 78% after air circulation was activated, while the temperature remained relatively constant at approximately 32°C. The data show that the developed system can assist occupants in understanding indoor environmental conditions and in making well-informed choices regarding room ventilation.]]>
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