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Monitoring Freon Pressure and Compressor Current Load to Maintain Efficient Internet of Things (IoT)-Based Air Conditioning (AC) Performance

Monitoring Tekanan Freon dan Beban Arus Kompresor Untuk Menjaga Efisiensi Kinerja Pendingin Ruangan(AC)Berbasis Internet of Things(IOT)

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DOI:

https://doi.org/10.21070/ups.9843

Keywords:

Refrigerant Pressure Monitoring, Compressor Current Load, Internet of Things (IoT, AC Performance Efficiency

Abstract

This study aims to develop an IoT-based monitoring system for Split AC units to track refrigerant pressure, compressor current load, and room temperature in real-time, enhancing operational efficiency and supporting preventive maintenance. The system is designed using an Arduino Nano as the main processing unit and an ESP8266 module for wireless communication integrated with the Blynk platform. A pressure transmitter measures refrigerant pressure, an ACS712 5A current sensor monitors the compressor load, and a DHT22 sensor records room temperature. Test results show that the pressure sensor has a maximum deviation of less than 0.1 psi compared to a manifold gauge, the ACS712 current sensor shows an average difference of 0.03 A compared to a clamp meter, and
the DHT22 temperature sensor has a maximum deviation of 0.4 °C compared to a reference thermometer. All sensor data were consistently displayed on the LCD and Blynk application, confirming reliable data transmission.

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Posted

2026-01-26