Position Coordination Aid for Blind Persons Based on LoRa Point to Point

DOI

10.2991/aer.k.211106.049How to use a DOI?

Keywords

Haversine; Range Conversion; LoRa; Blind Persons; Point to Point

Abstract

Conventional or electronic sticks are one of the tools that are often used by people with blind persons for independent activities. Both tools have limitations that cannot provide a sense of comfort in the form of information on the distance position between blind persons. In this research, electronic hardware is designed and built, which is integrated with conventional sticks. Designs and aids are made to exchange positional information on the distance between blind persons for normal and emergency conditions. The two electronic hardware consists of a global position system (GPS) modules, LoRa radio, DF mini-player, liquid crystal display (LCD), button, and a microcontroller. Communication between electronic hardware uses a point to point topology with half-duplex communication. Each hardware device is planted with source ID and destination ID, so that as soon as the push-button is pressed, the microcontroller reads the coordinate point data from the GPS module. The combined coordinate data and source ID are transmitted to the destination ID via LoRa radio and will exchange coordinate data instead. Furthermore, the two coordinate data in each microcontroller hardware is converted into distance information (meters) using the Haversine algorithm. Distance information is displayed on the LCD and converted into sound output through the DF mini-player speaker. The result of system functionality testing, the average percentage error is 1.21%, and the reading of all the resulting distance data can sound. Testing the GPS module obtained the percentage of conformity of the coordinates with an accuracy of 99%. Testing the data communication system obtained the maximum distance on the LoRa module as far as 500 meters. The received signal strength value (RSSI) parameter has no effect on the distance tested, and the receiver’s packet loss parameter will be very influential if it is blocked by an object (obstacle).

Copyright

© 2021 The Authors. Published by Atlantis Press International B.V.

Open Access

This is an open access article under the CC BY-NC license.

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TY  - CONF
AU  - Tata Supriyadi
AU  - Adira Salsabila
AU  - Ridwan Solihin
AU  - Rifa Hanifatunnisa
AU  - Budi Setiadi
AU  - Syifa Afni
PY  - 2021
DA  - 2021/11/23
TI  - Position Coordination Aid for Blind Persons Based on LoRa Point to Point
BT  - Proceedings of the 2nd International Seminar of Science and Applied Technology (ISSAT 2021)
PB  - Atlantis Press
SP  - 310
EP  - 315
SN  - 2352-5401
UR  - https://doi.org/10.2991/aer.k.211106.049
DO  - 10.2991/aer.k.211106.049
ID  - Supriyadi2021
ER  -