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All Journal Jurnal Media Elektro : Journal of Electrical Power, Informatics, Telecommunication, Electronics, Computer and Control System
Hendro FJ Lami
Undana
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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Analisis Dampak Variasi Data Transmisi pada Kinerja Protokol MAC Sistem Komunikasi Wireless Body Area Network Hendro FJ Lami; Stephanie Imelda Pella
Jurnal Media Elektro Vol 7 No 2 (2018): Oktober 2018
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (297.965 KB) | DOI: 10.35508/jme.v0i0.484

Abstract

Protokol media access control (MAC) berperan menjamin keberhasilan transmisi data antar sensor nirkabel dan konsumsi daya pada Wireless Body Area Network (WBAN). Penelitian ini membandingkan unjuk kerja dua buah protocol MAC, yaitu T-MAC dan ZigbeeMAC pada sistem WBAN, pada laju kedatangan paket (λ) yang berbeda. Hasil simulasi menunjukan bahwa pada jaringan dengan λ rendah tingkat keberhasilan pengiriman paket antara protocol T-MAC dan ZigbeeMAC mencapai rata-rata 90% dari throughput maksimal walaupun pada kondisi tersebut kinerja ZigbeeMAC memiliki nilai lebih baik dibanding T-MAC. Pada laju kedatangan paket tinggi, throughput pada T-MAC memiliki perbedaan yang signifikan terhadap ZigbeeMAC. Pada keadaan terburuk troughput T-MAC adalah 88% dari throughput maksimal sedangkan Zigbee menurun hingga 43% dari throughput maksimal. Kosumsi daya pada ZigbeeMAC cenderung konstan untuk setiap laju kedatangan paket sedangkan pada T-MAC meningkat sejalan dengan pertambahan laju kedatangan paket.
IMPLEMENTASI DETEKSI DAN PENGENALAN WAJAH PADA SISTEM UJIAN ONLINE MENGGUNAKAN METODE DEEP LEARNING BERBASIS RASPBERRY PI Hendro FJ Lami; Stephanie Imelda Pella
Jurnal Media Elektro Vol 8 N0.1 (2019): April 2019
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (240.807 KB) | DOI: 10.35508/jme.v8i1.1394

Abstract

Penelitian ini bertujuan untuk mengembangkan sistem yang secara otomatis dapat mengenali peserta dalam tes berbasis online untuk efisiensi waktu dan biaya. Sistem ini terdiri dari Raspberry Pi untuk menjalankan algoritma pengenalan wajah, Kamera Pi untuk menangkap gambar peserta dan server lokal untuk menyimpan data peserta. Pada tahap awal penelitian, dibangun sebuah dataset yang berisi foto terbaru peserta dan id peserta. Dataset ini kemudian digunakan dalam proses pembelajaran menggunakan algoritma haarcascade yang merupakan bagian dari metode deep learning untuk menghasilkan sebuah model. Pada tahap pengenalan, gambar peserta dibandingkan dengan model. Peserta yang berhasil dikenali akan secara otomatis dialokasikan ke komputer yang tersedia. Pengujian menunjukkan bahwa sistem berhasil mengenali peserta tes dan yang bukan peserta tes.
RANCANG BANGUN SISTEM PENGENALAN WAJAH DAFTAR PENCARIAN ORANG (DPO) BERBASIS JARINGAN SARAF TIRUAN Hendro FJ Lami; Silvester Tena; Beby H.A. Manafe; Johanis F.M Bowakh; Nursalim Nursalim; Sudirman S
Jurnal Media Elektro Vol 8 No 2 (2019): Oktober 2019
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (339.137 KB) | DOI: 10.35508/jme.v0i0.1786

Abstract

This study aims to design a system that is able to recognize the face of a people search list (DPO). The application is built using opencv and dlib ddan system testing is done with a dataset consisting of 6 target people. The target was identified when it was exactly perpendicular to the camera but the detection failed when the target's face was not exactly perpendicular. This study also models the transmission of target data detected using long range radio (LORA) at a frequency of 915
INTEGRASI PROTOKOL MQTT DAN HTTP UNTUK OTOMASI BERBASIS IOT PADA PERTANIAN LAHAN KERING Hendro FJ Lami; Kalvein R Rantelobo; Jani F Mandala; Agistinus S Sampeallo
Jurnal Media Elektro Vol 9 No 2 (2020): Oktober 2020
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jme.v0i0.3008

Abstract

The availability of telecommunication infrastructure and services has not been evenly distributed throughout the NTT region. This problem becomes the basis of this research to develop a communication system that capable of reaching areas without a telecommunications network. Through the LORA gateway on the raspberry pi, information from areas that are not covered by telecommunications services is sent to another gateway using a working frequency of 915MHz. The plant in this study is the regulation of soil moisture with the input of 2 sensors and 1 relay for controlling land irrigation activities. An esp8266 sensor node collects the sensing results of the YL-69 and DS18B20 sensors to control the pump motor operation. The process of sending data between the sensor node and the gateway uses the mqtt protocol. Users in areas served by the internet network can access all published data on the test website. The results of controlling the plant area in the test area fluctuated and tended to be stable at between 60% and 80%.
IMPLEMENTASI CHALLENGE RESPONSE AUTHENTICATION MECHANISM (CRAM) UNTUK KEAMANAN TRANSAKSI PERANGKAT IoT Hendro FJ Lami; Hendro F J Lami; Stephanie I Pella
Jurnal Media Elektro Vol 10 No 1 (2021): April 2021
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jme.v0i0.3836

Abstract

This research aims to secure data transaction in Internet of Things (IoT)devices using the challenge-response authentication mechanism (CRAM). The research choose uses ESP 8266 and ESP 32 to develop the system for their ability to run micropython programming language. Using a random challenge to grant authentication protects the system from replay attack from intruders. In each authentication process, the client receives a 10 digit random number to be encrypted using a shared key and sent back to the server. The server then checks if the client posses the correct key by decrypting the encrypted challenge using the same shared key. Access is granted if the decryption result is equal to the original challenge.
ANALISIS DAMPAK INTERFERENSI TERHADAP KUALITAS SINYAL JARINGAN LONG RANGE FREKUENSI 920MHZ-923MHZ (AS2) Hendro FJ Lami; Stephanie I Pella
Jurnal Media Elektro Vol 11 No 1 (2022): April 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jme.v0i0.6513

Abstract

This study modeled the interference between the Lora system signal in the AS2 frequency band and a non-Lora radio signal. Two Lora devices operate on uplink and downlink at a frequency of 923.2MHz to send and receive data on the bandwidth of 125KHz, 250KHz, and 500KHz. The interference generator device is composed of a single board computer installed by the RPITX application. In addition, there is a GNU-Radio application to monitor data and signal transmission levels. Signal quality tests (RSSI, SNR, and time-on-air(ToA)) were carried out under line-of-sight (LOS) conditions and used reference distances of 1m and 4m. The ToA test shows that the greater the bandwidth, the smaller the ToA value, while the change in distance does not affect the ToA. The RSSI test shows that the change in distance affects the RSSI value more significantly than the change in bandwidth. The presence of an interference signal does not significantly affect the RSSI value. SNR testing shows that the greater the bandwidth, the smaller the SNR and significantly decreases when interference occurs.
PERBANDINGAN UNJUK KERJA COAP DAN HTTP PADA TRANSAKSI DATA PERANGKAT IOT Hendro FJ Lami; Stephanie I. Pella
Jurnal Media Elektro Vol 11 No 2 (2022): Oktober 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jme.v0i0.8216

Abstract

Internet of Things (IoT) is the interconnection of several devices that have specific tasks such as sensing and control. The services in the system can be in the form of one device - one service, many devices - one service, one device -many services, and many devices - many services. A communication protocol is agreed upon by the devices in the IoT system to ensure the success of data transactions. These protocols include MQTT, HTTP, AMQP, XMPP, Web Shocket, and COAP. This study compares the performance of the COAP and HTTP protocols in consideration of the number of transactions and energy consumption. The scenario used is to send RSSI data and battery level. The scenarios also use two modes of transmission power:14dBm and 20dBm. The results show that the COAP protocol is 25 times more efficient than the HTTP protocol for a 20dBm transmit power scenario, while for a transmit power of 14dBm COAP is 61 times
INTEGRATING IEEE 802.11 AND LORAWAN FOR WIRELESS SENSOR NETWORK DATA TRANSACTION IN NON-INFRASTRUCTURE AREA Stephanie I. Pella; Hendro FJ Lami
Jurnal Media Elektro Vol 12 No 1 (2023): April 2023
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jme.v0i0.10105

Abstract

This research aims to develop a system that integrates the IEEE 802.11 network and LoRa WAN in developing a wireless sensor network (WSN) in an area without public communication infrastructure. The sensor nodes were developed using ESP 8266 Node MCU with embedded IEEE 802.11 module and the sink was developed using Raspberry Pi minicomputer with LoRa module. The frames sent by sensor nodes were classified into regular data and critical data. The sensing data is forwarded by the sink to the nearest location with internet access using LoRaWAN according to their priority. Each node sent its regular frames with an interarrival time that varies from 30 seconds to 3 minutes and critical frames with an interarrival time of 1 to 5 seconds. The result shows that the delay of the network sending solely regular frames varies from 16.4 s to 602 and the delay of the network sending solely critical frames varies from 0.32 t0 1 s. When some nodes in the network send the regular frames and the other nodes send the critical frames, the delay of the regular frames drops to 1.25-1.75 s. The packet delivery rate of the system is 100%.
Co-Authors Agistinus S Sampeallo Beby H.A. Manafe Hendro F J Lami Jani F Mandala, Jani F Johanis F.M Bowakh Nursalim Nursalim Rantelobo, Kalvein Silvester Tena Stephanie I Pella Stephanie I. Pella Stephanie Imelda Pella Sudirman Syam