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All Journal Jurnal Edukasi dan Penelitian Informatika (JEPIN) Jurnal Elementer (Elektro dan Mesin Terapan) SENTIA 2015 JASIEK (Jurnal Aplikasi Sains, Informasi, Elektronika dan Komputer) Jurnal Telkommil Jurnal ELTEK
Isa Mahfudi
Pokiteknik Negeri Malang
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Engineering Mathematics Mechanical Engineering

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Rancang Bangun dan Evaluasi Sistem Pelacakan Lokasi Antarpendaki Berbasis LoRa dengan Aplikasi Android Tanpa Koneksi Internet mahfudi, isa; Delila Lukisani Tungga Dewi; Hadiwiyatno
Jurnal ELEMENTER (Elektro dan Mesin Terapan) Vol 11 No 2 (2025): Jurnal Elektro dan Mesin Terapan (ELEMENTER)
Publisher : Politeknik Caltex Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35143/elementer.v11i2.6784

Abstract

Mountain hiking activities in Indonesia continue to grow, yet limited cellular network coverage in mountainous areas remains a major challenge for communication and hiker safety monitoring. This study aims to design and implement a LoRa-based hiker location tracking system integrated with an Android application operating without an internet connection. The system consists of ESP32-based nodes integrated with GPS SIM808 and LoRa Ebyte E220-900T22D modules for transmitting positional data between devices. The coordinates are exchanged via a peer-to-peer (P2P) LoRa network and displayed in real-time on an Android application using offline OpenStreetMap. The research employed a Research and Development (R&D) approach through stages of system design, implementation, and functional testing in open-field conditions. Experimental results show that the system achieved an average GPS accuracy deviation of 6–7 meters, LoRa communication range of up to 500 meters (LOS) and 350 meters (NLOS), and an average Bluetooth communication delay of 990 ms. The findings demonstrate that the proposed system can effectively display inter-hiker positions in near real-time without internet connectivity, enhancing safety and coordination among hikers in signal-limited environments.
Rancang Bangun Repeater LoRa Berbasis Ebyte E220-400T22D untuk Memperluas Jangkauan Komunikasi Setiadi, Chandrasena; Mahfudi, Isa
Jurnal ELEMENTER (Elektro dan Mesin Terapan) Vol 11 No 2 (2025): Jurnal Elektro dan Mesin Terapan (ELEMENTER)
Publisher : Politeknik Caltex Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35143/elementer.v11i2.6789

Abstract

The limited availability of cellular networks in remote areas such as mountain trails and highland regions requires the development of a reliable, low-power, and easily deployable communication system. This study presents the design and implementation of a LoRa repeater based on the Ebyte E220-400T22D module to extend data communication coverage under both line-of-sight and non-line-of-sight conditions. The system utilizes an ESP32 microcontroller that controls two LoRa transceiver modules through a store-and-forward mechanism to retransmit data automatically. Experimental results show that the proposed repeater system effectively increases the communication range under various terrain conditions while maintaining signal stability and transmission reliability. The delay observed in data transmission remains within an acceptable range, confirming that the repeater operates efficiently without significantly affecting system performance. Overall, this work demonstrates that the Ebyte E220-400T22D-based LoRa repeater provides a practical and energy-efficient solution for long-range wireless communication in areas with limited telecommunication infrastructure.
Implementasi You Only Look Once (YOLO) dalam Deteksi Telur Menetas pada Reptil Isa Mahfudi; Ahmad Rozak Setia Nugraha; Azam Muzakhim Imammuddin
JASIEK (Jurnal Aplikasi Sains, Informasi, Elektronika dan Komputer) Vol. 6 No. 2 (2024): Desember 2024
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jasiek.v6i2.13525

Abstract

Saat ini reptil dijadikan hewan peliharaan karena perawatan yang mudah dan warna motif yang beragam salah satunya adalah Leopard Gecko. Perawatan Leopard Gecko yang baru menetas berbeda dari yang dewasa karena Leopard Gecko yang baru menetas harus segera ditempatkan di kandang yang diberi alas tisu dan disemprot air untuk menghindari kehilangan air. penelitian ini bertujuan untuk mengembangkan sistem deteksi telur menetas menggunakan YOLO (You Only Look Once). Hasil penelitian menunjukkan bahwa algoritma YOLO dapat digunakan untuk mendeteksi telur Leopard Gecko menetas secara real-time. persentase keberhasilan deteksi YOLO mencapai 94,73% pada jarak kamera 25 cm, pencahayaan 512-895 lux, dan 200 epoch pelatihan atau dapat mendeteksi 54 dari 57 objek. Jadi, model YOLO yang telah dilatih sudah memiliki keandalan yang baik dalam mendeteksi telur menetas pada reptil.
Co-Authors Abdul Malik Ahmad Rozak Setia Nugraha Arsyad, Mehmek Ali Akza Asari, M. Sofyan Azam Muzakhim Imammuddin Bambang Purwanto Darmansyah, Rendi Delila Lukisani Tungga Dewi Derius Minggu, Desy Fajar Erianto, Verlian Gatut Yulisusianto Hadiwiyatno Harliana Harliana Lis Diana Mustafa Minggu, Desyderius Moechammad Sarosa Muh Bambang Purwanto Muhammad Ridwan Pratama, Bima Anugrah Purwanto, Muh Bambang Putra, Dheo Setiadi, Chandrasena Sujai, Muhammad Syirajuddin Syahputra, Rifqi Ihza Theresia Dwi Siwi Candra Widyati Wirayuda, Dhava