iOS - Failed to encrypt the connection, the connection has timed out unexpectedly.

[marcelowolfsmartindustries]

Describe the bug
First time connects to BLE successfully. Next times gives the error:
error: Failed to encrypt the connection, the connection has timed out unexpectedly.

Expected behavior
Sucessfully connection.

Screenshots

Plugin version:

• @capacitor-community/bluetooth-le:2.0.1

Smartphone (please complete the following information):

• Device: Iphone 11 PRO
• OS: iOS 16.1.2
• Browser
• Version

[pwespi]

Hi

Thank you for using this plugin.

Can you share the logs you get from Xcode? Are you able to connect to the device with another app, e.g. nRF Connect?

[marcelowolfsmartindustries]

I notice that, this happens after bounding.

Xcode logs when success:

⚡️  BluetoothLe - Resolve initialize BLE powered on
⚡️  TO JS undefined
⚡️  To Native ->  BluetoothLe isEnabled 104953965
⚡️  TO JS {"value":true}
⚡️  To Native ->  BluetoothLe getConnectedDevices 104953966
⚡️  TO JS {"devices":[]}
⚡️  To Native ->  BluetoothLe addListener 104953967
⚡️  To Native ->  BluetoothLe requestLEScan 104953968
⚡️  BluetoothLe - Resolve startScanning Scan started.
⚡️  TO JS undefined
⚡️  BluetoothLe - New device found:  GLAMM
⚡️  TO JS {"txPower":127,"localName":"GLAMM","uuids":[],"rssi":-73,"device":{"name":"GLAMM","deviceId":"FEE99B3A-8E41-43CB-7EAF-8B1B94A46EBC"}}
⚡️  To Native ->  BluetoothLe removeListener 104953969
⚡️  To Native ->  BluetoothLe stopLEScan 104953970
⚡️  BluetoothLe - Stop scanning.
⚡️  TO JS undefined
⚡️  To Native ->  BluetoothLe removeListener 104953971
⚡️  To Native ->  BluetoothLe addListener 104953972
⚡️  To Native ->  BluetoothLe connect 104953973
⚡️  BluetoothLe - Connecting to peripheral <CBPeripheral: 0x283a30680, identifier = FEE99B3A-8E41-43CB-7EAF-8B1B94A46EBC, name = GLAMM, mtu = 0, state = disconnected>
⚡️  BluetoothLe - Connected to device <CBPeripheral: 0x283a30680, identifier = FEE99B3A-8E41-43CB-7EAF-8B1B94A46EBC, name = GLAMM, mtu = 23, state = connected>
⚡️  BluetoothLe - Resolve connect|FEE99B3A-8E41-43CB-7EAF-8B1B94A46EBC Successfully connected.
⚡️  BluetoothLe - Connected to peripheral. Waiting for service discovery.
⚡️  BluetoothLe - didDiscoverServices
⚡️  BluetoothLe - didDiscoverCharacteristicsFor 1 1
⚡️  BluetoothLe - Resolve connect Connection successful.
⚡️  TO JS undefined
⚡️  To Native ->  BluetoothLe getServices 104953974
⚡️  To Native ->  Preferences set 104953975
⚡️  TO JS {"services":[{"characteristics":[{"properties":{"writeWithoutResponse":false,"write":false,"extendedProperties":false,"read":false,"notifyEncryptionRequired":false,"authenticatedSignedWrites":false,"indicateEncryptionRequired":false,"indicate":false,"broad
⚡️  TO JS undefined
⚡️  To Native ->  BluetoothLe getServices 104953976
⚡️  TO JS {"services":[{"characteristics":[{"properties":{"writeWithoutResponse":false,"write":false,"extendedProperties":false,"read":false,"notifyEncryptionRequired":false,"authenticatedSignedWrites":false,"indicateEncryptionRequired":false,"indicate":false,"broad
⚡️  To Native ->  BluetoothLe write 104953977
⚡️  BluetoothLe - Reject write|0003CDD0-0000-1000-8000-00805F9B0131|0003CDD2-0000-1000-8000-00805F9B0131 Write timeout.
ERROR MESSAGE:  {"errorMessage":"Write timeout.","message":"Write timeout."}
⚡️  [error] - {"errorMessage":"Write timeout.","message":"Write timeout."}
⚡️  To Native ->  BluetoothLe write 104953978
⚡️  [error] - ERROR Error: Uncaught (in promise): overlay does not exist
⚡️  BluetoothLe - Reject write|0003CDD0-0000-1000-8000-00805F9B0131|0003CDD2-0000-1000-8000-00805F9B0131 Write timeout.
ERROR MESSAGE:  {"errorMessage":"Write timeout.","message":"Write timeout."}
⚡️  [error] - {"errorMessage":"Write timeout.","message":"Write timeout."}
⚡️  [error] - ERROR Error: Uncaught (in promise): overlay does not exist

Here when fails:

⚡️  To Native ->  BluetoothLe initialize 104953982
2023-01-27 14:49:39.383132+0000 App[878:33659] [CoreBluetooth] XPC connection invalid
⚡️  BluetoothLe - Resolve initialize BLE powered on
⚡️  TO JS undefined
⚡️  To Native ->  BluetoothLe isEnabled 104953983
⚡️  TO JS {"value":true}
⚡️  To Native ->  BluetoothLe getConnectedDevices 104953984
⚡️  TO JS {"devices":[]}
⚡️  To Native ->  BluetoothLe addListener 104953985
⚡️  To Native ->  BluetoothLe requestLEScan 104953986
⚡️  BluetoothLe - Resolve startScanning Scan started.
⚡️  TO JS undefined
⚡️  BluetoothLe - New device found:  GLAMM
⚡️  TO JS {"device":{"name":"GLAMM","deviceId":"FEE99B3A-8E41-43CB-7EAF-8B1B94A46EBC"},"rssi":-81,"txPower":127,"uuids":[],"localName":"GLAMM"}
⚡️  To Native ->  BluetoothLe removeListener 104953987
⚡️  To Native ->  BluetoothLe stopLEScan 104953988
⚡️  BluetoothLe - Stop scanning.
⚡️  TO JS undefined
⚡️  To Native ->  BluetoothLe removeListener 104953989
⚡️  To Native ->  BluetoothLe addListener 104953990
⚡️  To Native ->  BluetoothLe connect 104953991
⚡️  BluetoothLe - Connecting to peripheral <CBPeripheral: 0x283a200d0, identifier = FEE99B3A-8E41-43CB-7EAF-8B1B94A46EBC, name = GLAMM, mtu = 0, state = disconnected>
⚡️  BluetoothLe - Reject connect|FEE99B3A-8E41-43CB-7EAF-8B1B94A46EBC Failed to encrypt the connection, the connection has timed out unexpectedly.
ERROR MESSAGE:  {"message":"Failed to encrypt the connection, the connection has timed out unexpectedly.","errorMessage":"Failed to encrypt the connection, the connection has timed out unexpectedly."}
⚡️  [error] - {"message":"Failed to encrypt the connection, the connection has timed out unexpectedly.","errorMessage":"Failed to encrypt the connection, the connection has timed out unexpectedly."}
⚡️  BluetoothLe - Reject connect Connection timeout
ERROR MESSAGE:  {"message":"Connection timeout","errorMessage":"Connection timeout"}
⚡️  [error] - {"message":"Connection timeout","errorMessage":"Connection timeout"}
⚡️  [warn] - {"message":"Connection timeout","errorMessage":"Connection timeout"}

I don't know how to solve this.

I already post this in stackoverflow:
https://stackoverflow.com/questions/75197315/ble-ios-failed-to-encrypt-the-connection-the-connection-has-timed-out-unexpec

I think that is related with the issue, that in iOS Ble not really disconnects.

[pwespi]

Thanks for the logs and the link to the stackoverflow post. After reading some more about this, it seems that it is an issue with iOS. So I don't think there is anything that can be done in the pluin.