Analysis of the Use of HC-SR501 PIR and HC-SR04 Ultrasonic Sensor in Arduino Uno-Based Waste Place Control and Monitoring System with Internet Access (IoT). Borneo Engineering & Advanced Multidisciplinary International Journal, [S. l.], v. 3, n. 2, p. 21–24, 2024. Disponível em: https://beam.pmu.edu.my/index.php/beam/article/view/177.. Acesso em: 7 nov. 2024.