iOS crashed on "String error does not represent a valid UUID"

[wbees]

Disconnect first, then connect, there is a chance of crash.

      Fatal Exception: NSInternalInconsistencyException

0 CoreFoundation 0x83f20 __exceptionPreprocess
1 libobjc.A.dylib 0x172b8 objc_exception_throw
2 Foundation 0x6de7f8 _userInfoForFileAndLine
3 CoreBluetooth 0xeae4 -[CBUUID initWithString:safe:]
4 CoreBluetooth 0xe8e8 +[CBUUID UUIDWithString:]
5 StarMgsIO 0x633c (Missing UUID cc8699e7482330e1a0f6f849bdb0836c)
6 CoreBluetooth 0x262f4 -[CBCentralManager handlePeripheralConnectionCompleted:]
7 CoreBluetooth 0x66f8 -[CBCentralManager handleMsg:args:]
8 CoreBluetooth 0x65dc -[CBManager xpcConnectionDidReceiveMsg:args:]
9 CoreBluetooth 0x6488 __30-[CBXpcConnection _handleMsg:]_block_invoke

[KHosozawa]

@wbees
Thank you for your report.

Could you please provide us with the following information so we can investigate this issue?

1. Model of Scale
2. iOS version
3. Xcode version

Best regards.

[wbees]

@KHosozawa

1. Model of Scale: MG-T30
2. iOS version: 17.6.1
3. Xcode version: 15.4

[wbees]

Another crash report:

      Crashed: jp.star-m.starmgsio

0 StarMgsIO 0x7588 -[STARMGTSResponseData rangeOfFirstResponse:] + 60
1 StarMgsIO 0x8cec -[STARScale peripheral:didUpdateValueForCharacteristic:error:] + 288
2 CoreBluetooth 0x4ab00 -[CBPeripheral handleAttributeEvent:args:attributeSelector:delegateSelector:delegateFlag:] + 188
3 CoreBluetooth 0x4ac30 -[CBPeripheral handleCharacteristicEvent:characteristicSelector:delegateSelector:delegateFlag:] + 100
4 CoreBluetooth 0x47784 -[CBPeripheral handleMsg:args:] + 632
5 CoreBluetooth 0x66b0 -[CBCentralManager handleMsg:args:] + 152
6 CoreBluetooth 0x65dc -[CBManager xpcConnectionDidReceiveMsg:args:] + 228
7 CoreBluetooth 0x6488 __30-[CBXpcConnection _handleMsg:]_block_invoke + 48

[KHosozawa]

@wbees
Thank you for the additional information.
We will investigate this issue.

[bandit-ibayashi]

@wbees
Thank you for your patience. We are trying to reproduce the reported Issue, but so far have not been able to do so.
We have powered off the scale from the connection approximately 50 times and it remains in a normal state.

We share our verification environment below. If you notice any differences, please let us know.

• Host: iPhone SE 3rd Gen. with iOS 18.1.1
• Scale: MG-T60UBD.
• Xcode 16.1
• StarMgsIO SDK 1.5.3

[wbees]

@bandit-ibayashi @KHosozawa
Thank you for investigation this issue.
This issue is not stable to reproduce, but you can try this steps.

1. call the STARDeviceManager.shared().connectScale-> the scale is connected.
2. call the disconnectScale API.
3. after a delay of 0 to 0.5 seconds, call the connectScale API.
   Repeating this process multiple times may cause the issue to recur.