Epson BT-2000 Developers Guide - Page 108

RSSI value when Measured Power for the Beacon is set to -70

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Determining distance for the BLEBeacon You need to perform distance determination for the BT-2000 and the Beacon in the app. Distance determination is calculated based on the Measured Power included in the Advertise data by the BLEBeacon app. Since Measured Power support varies depending on the Beacon manufacturer, you will need to decide whether or not ("Use" or "Do not use") to use the distance determination based on Measured Power supplied by the company identifier in the BLEBeacon app. Distance is determined from the Measured Power and RSSI value as shown below. Table 8-6 Determining distance for the BLEBeacon app Determination result Immediate Near Far Unknown RSSI value (when Measured Power for the Beacon is set to -70) 127 to -70 (=Measured Power) -51 to -90 (=Measured Power - 20) -91 to 128 Could not receive Advertise data for more than three seconds Or the company identifier was not Apple (0x004C) or Nordic (0x0059). MOVERIO Pro Developer's Guide (Rev.1.0) 104

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MOVERIO Pro Developer's Guide (Rev.1.0)
104
Determining distance for the BLEBeacon
You need to perform distance determination for the BT-2000 and the Beacon in the app.
Distance determination is calculated based on the Measured Power included in the Advertise
data by the BLEBeacon app.
Since Measured Power support varies depending on the Beacon manufacturer, you will need
to decide whether or not ("Use" or "Do not use") to use the distance determination based on
Measured Power supplied by the company identifier in the BLEBeacon app. Distance is
determined from the Measured Power and RSSI value as shown below.
Table 8-6 Determining distance for the BLEBeacon app
Determination result
RSSI value (when Measured Power for the Beacon is set to -70)
Immediate
127 to -70 (=Measured Power)
Near
-51 to -90 (=Measured Power - 20)
Far
-91 to 128
Unknown
Could not receive Advertise data for more than three seconds
Or the company identifier was not Apple (0x004C) or Nordic
(0x0059).