Nurfalaq, Aryadi, et al. “Development of an ESP32-Based Resistivity Meter Instrument With Integration of ACS712 Current Sensor, ADS1115 Voltage Sensor and Neo6MV2 GPS Module”. Jurnal Penelitian Fisika Dan Aplikasinya (JPFA), vol. 15, no. 2, Dec. 2025, pp. 145-58, doi:10.26740/jpfa.v15n2.p145-158.