Position detection for lost items finding system using LoRa devices in large building

Abstract

This paper discusses an indoor location finding method using LoRa devices in a large building. To find the position, RSSI from the receiver is measured. The floor number of the item can be detected by measuring the RSSI on each floor, whether the lost item is put outside the room, inside the room, or in a steel box. Moreover, a directional antenna is used to detect the angle of the item.