The Received Signal Strength Indicator (RSSI), in decibels, of the peripheral.
- iOS 5.0–8.0Deprecated
- macOS 10.7–10.13Deprecated
- Mac Catalyst 13.0–13.0Deprecated
- tvOS 9.0–9.0Deprecated
- watchOS 2.0–2.0Deprecated
- Core Bluetooth
Returns a number, in decibels, that indicates the RSSI of the peripheral while connected to the central manager. You can use a connected peripheral’s RSSI property to determine the peripheral’s proximity. The default value of this property is
nil; the first successful call to
read sets its value.