I need to programmatically detect the connect and disconnect event of any bluetooth device with iPhone, while app is in background.
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1If you mean accessory devices, such as handsfree, audio speakers etc then the answer is you can't. If you mean BLE peripheral's then your app can manage its own connections but doesn't know anything about any other apps connections. – Paulw11 May 01 '16 at 13:31
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@Paulw11 I'm targeting Bluetooth Audio Speakers – J Reymond May 01 '16 at 14:57
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In that case you may be able to use route change monitoring https://developer.apple.com/library/ios/documentation/Audio/Conceptual/AudioSessionProgrammingGuide/HandlingAudioHardwareRouteChanges/HandlingAudioHardwareRouteChanges.html but you will only get a notification in the background if you have an active audio session in background mode. – Paulw11 May 01 '16 at 22:29