Warning: file_get_contents(https://ojs.journalbusiness.my/ojs.php): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found
 in /var/www/ojs.unud.ac.id_backup/lib/pkp/includes/functions.inc.php on line 4
		Kusuma Jaya, I., 		Widagda, I., & 		Antha Kasmawan, I.
2021 Oct 30. Rancang The Prototype of Water Level Detection System Using HC-SR04 Sensor and GSM SIM800L Module Based on ATMega 328 Microcontroller. BULETIN FISIKA. [Online] 24:1