Antitheft Technology for Smart Carts Using Dual Beacons and a Weight Sensor

Table 1

Division of the level and value according to measured distance with RSSI range.

Level	Value	RSSI range	Measured distance (approximately)
Immediate	1	Over −57 dBm	Under 50 cm
Immediate-Near	2	−57 dBm ∼ −73 dBm	50 cm ∼ 3 m
Near	3	−73 dBm ∼ −81 dBm	3 m ∼ 7 m
Near-Far	4	−81 dBm ∼ −83 dBm	7 m ∼ 10 m
Far	5	Under −83 dBm	Over 10 m