Makmur, Alfhian, and Siaulhak. 2023. “DEVELOPMENT OF A RIVER WATER LEVEL MONITORING SYSTEM IN BONELEMO VILLAGE BASED ON ARDUINO MICROCONTROLLER USING ULTRASONIC SENSORS AND SMS GATEWAY”. Edutech: Jurnal Pendidikan Dan Teknologi 1 (1):7-10. https://doi.org/10.53696/29872359.86.