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All Journal Prosiding KOMMIT Elektron Jurnal Ilmiah Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Teknologi Informasi dan Ilmu Komputer Setrum : Sistem Kendali-Tenaga-elektronika-telekomunikasi-komputer ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Orbith : Majalah Ilmiah Pengembangan Rekayasa dan Sosial IJITEE (International Journal of Information Technology and Electrical Engineering) Mitra Akademia: Jurnal Pengabdian Masyarakat SPEKTRAL : Journal of Communications, Antennas and Propagation
Yenniwarti Rafsyam
Politeknik Negeri Jakarta
Humanities Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Library & Information Science Social Sciences

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Pengembangan Sistem Pemantauan Dan Pengendalian Daya Listrik Penyewa Kos Berbasis Lora Dengan Integrasi Android Putri, Khomala Ernia; Yenniwarti Rafsyam; Benny Nixon; Putri, Khomala; Molliyana Tota Angelica; Rifqi Fuadi Hasani; Shita Fitria Nurjihan; Irwan Prasetya
Jurnal Teknologi Informasi dan Ilmu Komputer Vol 12 No 4: Agustus 2025
Publisher : Fakultas Ilmu Komputer, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25126/jtiik.124

Abstract

Pengelolaan daya listrik di kamar kos sering kali menimbulkan ketidakadilan karena biaya listrik disamaratakan, meski pemakaian berbeda. Untuk mengatasi masalah ini, dirancang sebuah sistem pemantauan daya listrik dengan teknologi LoRa. Sistem ini memanfaatkan mikrokontroler ESP32, sensor PZEM-004T, LoRa, dan Arduino IDE. Data penggunaan daya listrik yang dikumpulkan oleh sensor dikirim ke pemilik kos melalui jaringan LoRa. Data penggunaan daya listrik dikirim melalui jaringan LoRa hingga 150 meter (RSSI -107 dBm) dalam kondisi NON-LOS dan 600 meter (RSSI -111 dBm) dalam kondisi LOS, kemudian diintegrasikan ke aplikasi Android untuk pengelolaan dan pemantauan daya listrik. Hasil pengujian menunjukkan akurasi 99%, menjadikan sistem ini solusi efektif dan efisien untuk pengelolaan daya listrik di kamar kos.   Abstract Electricity management in boarding rooms is often unfair because electricity costs are shared equally, even though each room uses different amounts of electricity. To address this issue, an electricity monitoring system was developed using LoRa technology. The system uses an ESP32 microcontroller, a PZEM-004T sensor, LoRa, and Arduino IDE. The sensor collects electricity usage data and sends it to the landlord via the LoRa network. This data can be transmitted up to 150 meters (RSSI -107 dBm) in NON-LOS conditions and 600 meters (RSSI -111 dBm) in LOS conditions. The system is also integrated with an Android application for easier management and monitoring. Testing results show an accuracy of 99%, making this system an effective and efficient solution for managing electricity in boarding rooms.
Perancangan Antena Mikrostrip Rectangular Crab Patch sebagai Antena Eksternal Penerima Sinyal 4G Frekuensi 2,3 GHz Suryani, Mary Alysia; Diwyacitta, Branita Adwitiya; Rafsyam, Yenniwarti
Spektral Vol. 6 No. 2 (2025): Oktober 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v6i2.7920

Abstract

Wireless 4G communication has become an essential part of supporting daily digital services such as internet browsing, video streaming, and low-latency applications. However, 4G signal reception often faces degradation in various locations, particularly in remote areas or inside buildings with structural barriers. One effective solution to enhance signal reception is the use of a microstrip antenna, which offers advantages such as a simple design, compact size, and low manufacturing cost. This study presents the design of a rectangular crab patch microstrip antenna for 4G signal reception operating at a frequency of 2.3 GHz. The antenna was designed with a patch size of 15.5 mm, an inter-element spacing of 62.5 mm, a dielectric constant (εr) of 4.3, and a substrate thickness (h) of 1.6 mm. The simulation results show that the antenna achieved an S₁₁ of –46.26 dB, a VSWR of 1.009, and a gain of 3.53 dB. Overall, the antenna meets the expected performance criteria and is suitable for effective 4G signal reception.
Co-Authors Akoh Herudin Alica Dewanti ANGELICA, MOLLIYANA TOTA Annisa Yumna Yudistia Arifuddin, Fikri Benny Nixon Benny Nixon Diwyacitta, Branita Adwitiya Fadhilah, Naufal Fahmi, Ahdiyat Hasani, Rifqi Fuadi Herlina L, Yeli Herudin Herudin Irwan Prasetya Jonifan Kurniawati, Nazmia Lifwarda Lifwarda Malika Sahnah Milda Yuliza Molliyana Tota Angelica Nida Febiana, Nida Nuhung Suleman Nuhung Suleman Panji Ibrahim N Ibrahim N Prasetya, Irwan Putri, Khomala PUTRI, KHOMALA ERNIA Raihan, Muhammad Rifqi Fuadi Hasani Shita Fitria Nurjihan Sri Danaryani Suryani, Mary Alysia Teguh Firmansyah Wahyu Supriyatin