In this research, we examined whether we could estimate the position of the transmission source by using the Bluetooth beacon with Eddystone sent by a smartphone. In our experiment, free-space attenuation and soil attenuation of the beacon were measured. From the experimental results, when field intensity more than -80 dB was obtained, the source was within 5 m in the free space and within 0.5 m in soil-depth. Therefore, this method showed the possibility that was effective for victims search.
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