Rancang Bangun Robot Pelontar Bola Tenis Lapangan Berbasis Internet of Thing (IoT) Putra, Trivaldo FT UNP Hambali, Hambali Sukardi, Sukardi Yuhendri, Muldi thesis https://repository.unp.ac.id/id/eprint/38964/ https://repository.unp.ac.id/id/eprint/38964/1/B1_3_TRIVALDO_PUTRA_18130107_1232_2023%20%281%29.pdf open access 2023-02-27 Robot Pelontar Tenis Lapangan Internet of Things IoT Arduino Automasi