CD Tesis

Pengembangan Transmisi Data Berbasis Modul Long Range (Lora) Tipe E32-Ttl-1w Berdasarkan Variasi Obstacle Dan Kecepatan Transmisi

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Long-Range Module (LoRa) is an LPWAN module based on radio waves
with regulated frequency which has low power with a distance of up to 15 Km.
Physical Layer Setting (PHY) factors affect the transmission speed (ADR) and
signal range of the LoRa module which can be programmably adjusted. These
PHY factors consist of Bandwidth (BW), Coding Rate (CR), Spreading Factor
(SF) and transmission power which were part of ADR. This research consists of
two stages, such as the electronic system design and programming of the Atmega8
MCU which is connected to the LoRa E32-TTL-1W module using the ASIA 433
MHz regulatory frequency with a transmission power of 30 dBm. The data
transmission system was tested by varying the obstacles such as trees, shrubs, and
water to observe the effect on performance and signal range, transmission speed
(ADR), comparison to the ratio of lost data (Path Loss, PL), and fresnel zone (FZ)
effects in the District Tempuling, Indragiri Hilir Regency. In addition to obstacle
variations, the consumption power of each LoRa operation mode was also
measured in each operation mode with a constant distance of 2 meters at the
Applied Physics Laboratory of FMIPA, Riau University. LoRa has two operating
modes, including fixed mode and WOR mode, and 2 transmission conditions, such
as normal and power saving, which can be programmable through digital pins
M0 and M1 on the LoRa module.
This research produces a prototype of sensor data transmission by testing it
experimentally. Based on the results obtained, the higher the ADR value, the
lower the data quality, which means that the signal range is also weak. The
farthest signal coverage is at 1.2 Kbps ADR and the smallest is at 19.2 Kbps ADR.
Based on the increase in the PL value of the three types of obstacle with an ADR
of 1.2 Kbps and a maximum distance of 2 Km, the largest PL value was found in
trees with PL by 20%, bushes of 10% and the smallest was in waters with a PL of
4%. This is due to the environmental vegetation profile which affects the
propagation of LoRa signals due to destructive interference and signal
attenuation. The level of data reliability is caused by the large value of the free
FZ, where the FZ free results tend to decrease with increasing distance. The value
of FZ free at a maximum distance of 2 km for water, bush and forest obstacle is
54.03%, 51.34%, and non-free, respectively. This is because the height of the
obstacle exceeds the antenna height which is called a Non-LoS condition where
the line of sight of the FZ is blocked by the obstacle. The measured LoRa
consumption current when in the data receiving state is 16 mA and when
transmitting data is 120 mA, and in sleep state is 30 μA for each operating mode.
Power saving operation mode at intervals of ≥ 3 s has a battery life of 68.4%
greater than that for normal mode.
Keywords: ADR and PL, power consumption, Frenel Zone, LoRa E32, obstacle.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

10 17. 220 (0009)

Penerbit

Pekanbaru : Universitas Riau – Pascasarjana – Tesis Fisika., 2020

Deskripsi Fisik

xiv, 65 hlm.; ill.: 29 cm

Bahasa

Indonesia

ISBN/ISSN

-

Klasifikasi

10 17. 220 (0009)

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

-

Subjek

FISIKA

Info Detail Spesifik

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Pernyataan Tanggungjawab

FATAH

Versi lain/terkait

Lampiran Berkas

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