## 2017年5月15日 星期一

### iBeacon: 用RSSI 如何推算距離?

Beacon 相對距離

iBeacon Payload中的TX power (Measured Power

#### Measured Power

Measured Power is a factory-calibrated, read-only constant which indicates what's the expected RSSI at a distance of 1 meter to the beacon. Combined with RSSI, it allows you to estimate the distance between the device and the beacon.