Alat Ukur Suhu Dan Kelembaban Untuk Kipas Otomatis Berbasis Arduino Uno

Abstract

Thermal comfort in indoor environments is strongly influenced by temperature and humidity conditions. This study aims to design and implement a temperature and humidity monitoring device equipped with an automatic fan control system based on the Arduino Uno microcontroller. The system utilizes the DHT22 sensor to measure temperature and humidity in real time, with data displayed on a 16x2 I2C LCD. When the temperature exceeds the threshold of 28°C, the fan is activated automatically via a relay module. The system is designed to be energy- efficient and user-friendly. Testing results indicate that the system operates responsively and accurately, with an average temperature measurement error of 0.55% and humidity error of 2.76%, along with standard deviations of 0.25% and 0.85% respectively. The uncertainty values are also low, confirming the DHT22 sensor’s reliability for small-scale environmental monitoring applications. Therefore, this device offers a practical and efficient solution to automatically maintain stable temperature and humidity in enclosed spaces without manual intervention.