Yakin, Gusnul, 		Satriya Wibawa, I Made, AND 		Putra, I Ketut.
" Design of Soil pH Measuring Instruments Using pH Meter Sensor Module V1.1 SEN0161 Based on Arduino Uno" <em>BULETIN FISIKA</em> [Online], Volume 22 Number 2 (25 January 2021)