Apple

On 24.07.2014, at 17:37, Joe Rossano <email@hidden> wrote:

I am trying to write a BTLE monitoring app that receives notifications.

I have built both the central app and a mock peripheral app using Core Bluetooth (on iOS 7.1). My central can connect fine to the peripheral, which advertises a service that has 2 CBCharacteristicPropertyNotify characteristics. But here is what happens once the central discovers the characteristics (removing non-essential code for clarity).

PD = CBPeripheralDelegate in central

PMD = CBPeripheralManagerDelegate in peripheral

PD callback invoked

- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error

{

for (CBCharacteristic *characteristic in service.characteristics)

{

[peripheral setNotifyValue:YES forCharacteristic:characteristic];

}

}

PMD callback invoked twice for the 2 characteristics

- (void)peripheralManager:(CBPeripheralManager *)peripheral central:(CBCentral *)central didSubscribeToCharacteristic:(CBCharacteristic *)characteristic

{

if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:FILTER_GENUINE_CHARACTERISTIC_UUID]])

{

BOOL genuineSent = [self.peripheralManager updateValue:genuineValue forCharacteristic:self.filterGenuineCharacteristic onSubscribedCentrals:nil];

}

else if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:FILTER_LOADING_CHARACTERISTIC_UUID]])

{

BOOL loadingSent = [self.peripheralManager updateValue:loadingValue forCharacteristic:self.filterLoadingCharacteristic onSubscribedCentrals:nil];

}

}

* The first time this method is invoked the return from

updateValue:forCharacteristic:onSubscribedCentrals: in YES.The second time

the return is always NO.

PD callback invoked twice for the 2 characteristics

- (void)peripheral:(CBPeripheral *)peripheral didUpdateNotificationStateForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error

* characteristic.isNotifying is always YES.

But that¹s it, no other callback methods are invoked!

PMD callback peripheralManagerIsReadyToUpdateSubscribers: is never called for the updateValue:forCharacteristic:onSubscribedCentrals: call that returned NO

- (void)peripheralManagerIsReadyToUpdateSubscribers:(CBPeripheralManager *)peripheral

PD callback peripheral:didUpdateValueForCharacteristic:error: is never called for the updateValue:forCharacteristic:onSubscribedCentrals: call that returned YES

- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error

I have been testing these apps on an iPad Air and iPhone 5s, both running

iOS 7.1.

Any idea why the notification is never invoked?

Thanks,

Joe

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