peripheral(_:didReadRSSI:error:)
Tells the delegate that retrieving the value of the peripheral’s current Received Signal Strength Indicator (RSSI) succeeded.
Declaration
optional func peripheral(_ peripheral: CBPeripheral, didReadRSSI RSSI: NSNumber, error: (any Error)?)Parameters
- peripheral:
The peripheral providing this information.
- RSSI:
The RSSI, in decibels, of the peripheral.
- error:
The reason the call failed, or
nilif no error occurred.
Discussion
Core Bluetooth invokes this method when your app calls the readRSSI() method, while the peripheral is connected to the central manager. If successful, the error parameter is nil and the parameter RSSI reports the peripheral’s signal strength, in decibels. If unsuccessful, the error parameter returns the cause of the failure.