Is there a recommended way for CBPeripheralManager to terminate a connection. The best way I have found so far is simply not to respond to dynamic value, then the BLE stack seems to close the connection, but that seems rather crude.
There must be a better way?
No, you can't forcefully close a connection in a clear way from the peripheral side. There is no API for it.
You can break the connection abruptly by not responding to a request, which results in disconnection at most after 30 seconds. This is the standard behavior defined by the Bluetooth specification Vol.3 Part F 3.3.3
A transaction not completed within 30 seconds shall time out. Such a transaction shall be considered to have failed and the local higher layers shall be informed of this failure. No more attribute protocol requests, commands, indica- tions or notifications shall be sent to the target device on this ATT Bearer.
来源：https://stackoverflow.com/questions/21537427/terminate-a-connection-cbperipheralmanager-side