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All Journal Yayasan Cita Cendikiawan Al Khwarizmi Jurnal Teknologi
Dahlan, A Ahmad
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Mengembangkan Kreativitas Siswa SMK Negeri 2 Padang Melalui Pelatihan Sistem Pintar Berbasis Internet Of Things (IoT) Ridho, Sahid; Yulindon , Yulindon; Pamungkas, Muhammad Putra; Dahlan, A Ahmad
Dedikasi Sains dan Teknologi (DST) Vol. 5 No. 2 (2025): Artikel Pengabdian Nopember 2025
Publisher : Information Technology and Science (ITScience)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47709/dst.v5i2.7137

Abstract

Kegiatan pengabdian kepada masyarakat ini dilaksanakan di SMK Negeri 2 Padang dengan fokus pada jurusan Teknik Jaringan Komputer dan Telekomunikasi. Program ini bertujuan untuk meningkatkan pemahaman serta keterampilan siswa dalam merancang dan mengimplementasikan sistem pintar berbasis Internet of Things (IoT). Permasalahan utama yang dihadapi mitra meliputi keterbatasan pemahaman tentang konsep IoT, minimnya pengalaman praktik, keterbatasan sarana prasarana, serta kesiapan siswa menghadapi tuntutan dunia kerja. Untuk menjawab permasalahan tersebut, kegiatan dilakukan melalui tahapan persiapan, penyusunan materi, pelaksanaan pelatihan, praktik langsung, serta evaluasi. Materi pelatihan mencakup pemrograman dasar mikrokontroler Arduino, pengoperasian sensor dan aktuator, hingga penerapan IoT menggunakan ESP32/ESP8266 yang terintegrasi dengan aplikasi Blynk dan Telegram. Hasil pelatihan menunjukkan peningkatan signifikan pada aspek pengetahuan, keterampilan, dan kompetensi siswa, yang dibuktikan melalui evaluasi kuesioner dengan mayoritas responden memberikan penilaian positif. Meskipun manfaat ekonomi belum sepenuhnya dirasakan secara langsung, kegiatan ini telah memberikan kontribusi nyata dalam menyiapkan siswa menghadapi perkembangan teknologi sekaligus menjadi fondasi bagi terciptanya peluang pengembangan di masa mendatang.
Evaluasi Kinerja Eksperimental Mekanisme Gateway-Polled Sequential Access (GPSA) pada Jaringan LoRa Multi-Node Single-hop untuk Aplikasi Internet of Things (IoT) Ridho, Sahid; Dahlan, A Ahmad; Yustini, Yustini; Rusfandi, Rusfandi; Ferdiansyah, Ferdiansyah
Jurnal Teknologi Vol 25, No 3 (2025): Desember 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i3.8301

Abstract

This study presents the development and experimental evaluation of a single-hop multi-node LoRa communication system implementing the Gateway-Polled Sequential Access (GPSA) mechanism. The proposed GPSA scheme is a simplified form of Time Division Multiple Access (TDMA), where the gateway acts as the central controller that sequentially triggers each node via a START command, ensuring collision-free communication. The system was tested in four communication scenarios (1–4 nodes) at distances of 10 m, 50 m, 100 m, and 200 m in an open-field environment using E22-900T22D LoRa modules, INA219 current sensors, and a microSD-based logging system. The evaluated parameters included Received Signal Strength Indicator (RSSI), Round Trip Time (RTT), Packet Delivery Ratio (PDR), and the energy consumption of both the gateway and nodes. Experimental results show that the RSSI decreased reasonably from −51 dBm to −82 dBm as distance increased, while RTT remained stable between 760–820 ms. The PDR consistently achieved 100% across all test scenarios, confirming the reliability of the sequential polling mechanism in avoiding transmission collisions. Node energy consumption remained stable at 16–18 mJ per communication cycle and was independent of distance, while gateway energy consumption increased proportionally with the number of active nodes. With a 7.4 V / 1100 mAh Li-Po battery, each node can operate continuously for approximately 17 days. Overall, the LoRa-GPSA system demonstrated high energy efficiency, communication stability, and straightforward implementation, making it an effective solution for medium-range IoT field applications
Co-Authors Ferdiansyah Ferdiansyah Pamungkas, Muhammad Putra Rusfandi Rusfandi Sahid Ridho Yulindon , Yulindon Yustini