Geothermal energy encompasses the heat stored within rocks and fluids beneath the Earth’s surface. Recognized as a renewable and environmentally friendly natural resource, geothermal heat has emerged as a crucial alternative energy source that demands development to generate electricity and foster the expansion of Indonesia’s power sector. An initial survey identifies potential geothermal areas by observing surface manifestations of geothermal activity. For instance, the village of Lokop in East Aceh Regency displays geothermal potential, marked by the presence of hot springs. However, insufficient research, especially in geophysical measurements, has been conducted in this location. Consequently, a comprehensive study is imperative to maximize the existing resource potential. The initial geophysical study can be conducted by analyzing the temperature distribution beneath the surface of the geothermal manifestation area. Temperature measurements beneath the Earth’s surface can be performed using DS18B20 temperature sensors, which are configured with microcontroller programming to read and transmit data to a server through the Internet of Things (IoT) approach. This ensures that the measured temperature data can be accessed in real-time by users. From the results of the conducted research, information related to the heat distribution at the Lokop hot spring source has been obtained. The heat distribution is directed towards the northwest of the research location. This heat distribution aligns with the direction of fault lines, including the Terujak, Leles, and Ujung Karang faults, which extend from the northwest to the southeast.