Abstract
This study contains the LoRa ES920LR test on obstruction or resistance conditions and its comparison with Free Space Path Loss (FSPL) using Drone means without obstacles. The ES920LR has 920 MHz frequency channel settings, 125 kHz Bandwidth, and SF 7-12, with 13 dBm Output Power. Comes with Sleep mode operation with Command Prompt based settings. The development board used is a leafony board, Leafony board is a board with a small size that is compatible with Arduino IDE, using a micro ATmega M328P microcontroller, this board is mounted tiled with complete facilities, e.g., a power supply board, four different sensor boards, MCU boards, communication boards e.g., WiFi and Bluetooth, specifically in this article using the LoRa ES920LR on the Leafony board, using LoRa because it requires a long range (km) and low power, and expansion boards that can be developed, Expansion to Leafony boards is expected to reduce the power consumption of the sensor node, lifetime, lif, small size, and lightweight. Furthermore, this algorithm is used to optimize LoRa Coverage and LoRa Lifetime. The results of receiving the FSPL LoRa 920LR have a Power Receiver (Pr) of 30 dB at a distance of 1 meter or A, at 500 meters 85 dB, 1500 meters 95 dB, 2.5km 100 dB. Attenuation is caused by distance, although not significant, other factors are obstacles or obstacles, bad weather (rain, snow).
Highlights
Lora ES920LR is a type of LoRa that works at 920 MHz
With the continued development of LoRa and LoRaWAN-based End nodes, a protocol that is capable of handling millions of end nodes is needed, it requires continuous renewal in terms of performance, security [8], robustness, in research [9] discussing the revolution of LoRaWAN network technology considering the IoT requirements
A blackboard-based board developed for LoRa ES920LR communication and applied to drones and GPS technology to obtain Spreading Factor (SF), Signal Noise Ratio (SNR) [17], and Receive Signal Strength Indicator (RSSI) values, the application in subsequent studies is to get patients (Longitude and Latitude) that can be accessed with Google maps, it can be seen that each patient's BPM is in a different location
Summary
Lora ES920LR is a type of LoRa that works at 920 MHz. LoRa ES920LR is used in Japan, principally it is important to study the Quality of Service (QoS) of LoRa as seen from various factors such as Radio Propagation, Ability of LoRa eg, Power save management, bandwidth, SF, Output Power, Sleep management mode, ability on Receive Signal Strength Indicator (RSSI)[14],[16], etc. With the continued development of LoRa and LoRaWAN-based End nodes, a protocol that is capable of handling millions of end nodes is needed, it requires continuous renewal in terms of performance, security [8], robustness, in research [9] discussing the revolution of LoRaWAN network technology considering the IoT requirements. A blackboard-based board developed for LoRa ES920LR communication and applied to drones and GPS technology to obtain SF, SNR [17], and RSSI values, the application in subsequent studies is to get patients (Longitude and Latitude) that can be accessed with Google maps, it can be seen that each patient's BPM is in a different location. Because of the shape of the Leafony board is small, it can be placed and flown by a drone
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