This study evaluates the performance of a resistivity meter based on the Arduino Mega 2560 R3, tested on a layered medium modeled in a measurement tank measuring 120 cm × 120 cm × 80 cm, with a total depth of 60 cm consisting of 30 cm of sand and 30 cm of clay. The device is designed for laboratory-scale resistivity measurements and is equipped with a data logger feature. The system is capabl…