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Re: iOS BLE peripheral connect-disconnect loop. Error Domain=CBErrorDomain Code=10
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Re: iOS BLE peripheral connect-disconnect loop. Error Domain=CBErrorDomain Code=10

  • Subject: Re: iOS BLE peripheral connect-disconnect loop. Error Domain=CBErrorDomain Code=10
  • From: Zach Dennis <email@hidden>
  • Date: Thu, 24 Apr 2014 10:20:52 -0400
If you look at the console log for your device does it show anything interesting (like BTServer constantly crashing)?

Does this occur in the app after it's been running a while (e.g. does your app constant disconnect, then reconnect later, then disconnect, then reconnect)? Or, does this occur intermittently when launching the app?

I believe there is a bug with the bluetooth stack where a iOS device will inconveniently start having issues connecting to a BTLE device if they frequently connect/disconnect/reconnect/etc without stopping/starting bluetooth on the phone or even restarting it. I haven't seen this often but I have seen it. 

Zach





On Tue, Apr 22, 2014 at 6:13 AM, Andreas Luka de Reggi <email@hidden> wrote:
Hello all.

I am new to the list. I am seeking help and hope I am in the right place.

To describe our problem:

We are creating a BLE peripheral to connect to iOS devices.
Most of the time the connection runs smoothly, but on occasion there are issues with which I am banging my head against the wall for a while now.

The CBCentralManager is initiated as follows:

dispatch_queue_t centralQueue = dispatch_queue_create("com.myapp.blecentral.queue", DISPATCH_QUEUE_SERIAL);
NSDictionary *options = @{CBCentralManagerOptionShowPowerAlertKey:@YES,
                                            CBCentralManagerOptionRestoreIdentifierKey:@"com.myapp.blecentral"};
_centralManager = [[CBCentralManager alloc] initWithDelegate:self queue:centralQueue options:options];

The usual connection procedure would be:
...
2014-04-22 11:32:27:138 MyApp[271:60b]  > connectPeripheral:
2014-04-22 11:32:27:852 MyApp[271:1803]         < centralManager:didConnectPeripheral:
2014-04-22 11:32:27:858 MyApp[271:60b]  > discoverServices:sUUIDs:
2014-04-22 11:32:28:472 MyApp[271:7307]         < peripheral:didDiscoverServices:
2014-04-22 11:32:28:474 MyApp[271:7307]         > discoverCharacteristics:sUUID:cUUIDs:
2014-04-22 11:32:28:922 MyApp[271:7307]         < peripheral:didDiscoverCharacteristicsForService:error:
2014-04-22 11:32:28:924 MyApp[271:7307]         > setNotificationForCharacteristic:sUUID:cUUID:enable:
2014-04-22 11:32:29:041 MyApp[271:7307]         < peripheral:didUpdateValueForCharacteristic:error:
2014-04-22 11:32:29:044 MyApp[271:7307]         > discoverCharacteristics:sUUID:cUUIDs:
2014-04-22 11:32:29:047 MyApp[271:7307]         < peripheral:didUpdateNotificationStateForCharacteristic:error:
2014-04-22 11:32:29:048 MyApp[271:7307]         < peripheral:didDiscoverCharacteristicsForService:error:
2014-04-22 11:32:29:049 MyApp[271:7307]         > readCharacteristic:sUUID:cUUID:
2014-04-22 11:32:29:131 MyApp[271:7307]         < peripheral:didUpdateValueForCharacteristic:error:
... and so on.

But sometimes:
...
2014-04-22 11:38:52:833 MyApp[271:60b]  > connectPeripheral:
2014-04-22 11:38:55:068 MyApp[271:7827]         < centralManager:didConnectPeripheral:
2014-04-22 11:38:55:071 MyApp[271:60b]  > discoverServices:sUUIDs:
2014-04-22 11:38:55:439 MyApp[271:7827]         < centralManager:didDisconnectPeripheral:error:
2014-04-22 11:38:55:440 MyApp[271:7827]         Error Domain=CBErrorDomain Code=10 "The connection has failed unexpectedly." UserInfo=0x14d84060 {NSLocalizedDescription=The connection has failed unexpectedly.}
2014-04-22 11:38:55:443 MyApp[271:60b]  > connectPeripheral:
2014-04-22 11:38:57:145 MyApp[271:7827]         < centralManager:didDisconnectPeripheral:error:
2014-04-22 11:38:57:146 MyApp[271:60b]  > connectPeripheral:
2014-04-22 11:38:57:647 MyApp[271:7827]         < centralManager:didConnectPeripheral:
2014-04-22 11:38:57:649 MyApp[271:60b]  > discoverServices:sUUIDs:
2014-04-22 11:38:58:018 MyApp[271:7827]         < centralManager:didDisconnectPeripheral:error:
2014-04-22 11:38:58:018 MyApp[271:7827]         Error Domain=CBErrorDomain Code=10 "The connection has failed unexpectedly." UserInfo=0x14e7fa90 {NSLocalizedDescription=The connection has failed unexpectedly.}
2014-04-22 11:38:58:021 MyApp[271:60b]  > connectPeripheral:
2014-04-22 11:38:58:285 MyApp[271:7827]         < centralManager:didConnectPeripheral:
2014-04-22 11:38:58:288 MyApp[271:60b]  > discoverServices:sUUIDs:
2014-04-22 11:38:58:677 MyApp[271:7827]         < centralManager:didDisconnectPeripheral:error: green
2014-04-22 11:38:58:678 MyApp[271:7827]         Error Domain=CBErrorDomain Code=10 "The connection has failed unexpectedly." UserInfo=0x14e699f0 {NSLocalizedDescription=The connection has failed unexpectedly.}
2014-04-22 11:38:58:681 MyApp[271:60b]  > connectPeripheral:
2014-04-22 11:39:00:871 MyApp[271:7827]         < centralManager:didConnectPeripheral:
2014-04-22 11:39:00:875 MyApp[271:60b]  > discoverServices:sUUIDs:
2014-04-22 11:39:01:604 MyApp[271:7827]         < centralManager:didDisconnectPeripheral:error: green
2014-04-22 11:39:01:604 MyApp[271:7827]         Error Domain=CBErrorDomain Code=6 "The connection has timed out unexpectedly." UserInfo=0x14d7d310 {NSLocalizedDescription=The connection has timed out unexpectedly.}
2014-04-22 11:39:01:608 MyApp[271:60b]  > connectPeripheral:
2014-04-22 11:39:02:143 MyApp[271:7827]         < centralManager:didDisconnectPeripheral:error: green
2014-04-22 11:39:02:146 MyApp[271:60b]  > connectPeripheral:
2014-04-22 11:39:02:800 MyApp[271:7827]         < centralManager:didConnectPeripheral:
2014-04-22 11:39:02:804 MyApp[271:60b]  > discoverServices:sUUIDs:
2014-04-22 11:39:03:538 MyApp[271:7827]         < centralManager:didDisconnectPeripheral:error:
2014-04-22 11:39:03:538 MyApp[271:7827]         Error Domain=CBErrorDomain Code=6 "The connection has timed out unexpectedly." UserInfo=0x14d7f860 {NSLocalizedDescription=The connection has timed out unexpectedly.}
...
This can loop from 1 to n times before finally:
...
2014-04-22 11:39:03:541 MyApp[271:60b]  > connectPeripheral:
2014-04-22 11:39:04:733 MyApp[271:730b]         < centralManager:didConnectPeripheral:
2014-04-22 11:39:04:736 MyApp[271:60b]  > discoverServices:sUUIDs:
2014-04-22 11:39:05:354 MyApp[271:730b]         < peripheral:didDiscoverServices: green
2014-04-22 11:39:05:355 MyApp[271:730b]         > discoverCharacteristics:sUUID:cUUIDs:
2014-04-22 11:39:05:804 MyApp[271:730b]         < peripheral:didDiscoverCharacteristicsForService:error:
2014-04-22 11:39:05:806 MyApp[271:730b]         > setNotificationForCharacteristic:sUUID:cUUID:enable:
2014-04-22 11:39:05:923 MyApp[271:730b]         < peripheral:didUpdateValueForCharacteristic:error:
2014-04-22 11:39:05:926 MyApp[271:730b]         > discoverCharacteristics:sUUID:cUUIDs:
2014-04-22 11:39:05:929 MyApp[271:730b]         < peripheral:didUpdateNotificationStateForCharacteristic:error:
2014-04-22 11:39:05:930 MyApp[271:730b]         < peripheral:didDiscoverCharacteristicsForService:error:
2014-04-22 11:39:05:930 MyApp[271:730b]         > readCharacteristic:sUUID:cUUID:
2014-04-22 11:39:06:013 MyApp[271:730b]         < peripheral:didUpdateValueForCharacteristic:error:
... connection succeeds.

Any help would be greatly appreciated.

Cheers,
Andreas
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      • From: Andreas Luka de Reggi <email@hidden>
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 >iOS BLE peripheral connect-disconnect loop. Error Domain=CBErrorDomain Code=10 (From: Andreas Luka de Reggi <email@hidden>)

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