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what exactly can corebluetooth applications do whilst in the background


what exactly can corebluetooth applications do whilst in the background  using -'ios,core-bluetooth'

The subject says it all, really. Documentation, insofar as it exists at all, suggests that apps written against the CoreBluetooth framework running on iOS devices can add "bluetooth-central" to their background privilege list and so process some kind of Bluetooth events whilst inactive, but which exact events do and do not get delivered?

For example:


Can I carry on communications with a device I already established a pairing with?
Can I issue periodic discovery requests to find devices which are out of range / I've never seen before? (For example if I wanted to be able to deliver a notification when a new interesting device is encountered)
What if a device goes out of range and then comes back? Will I get disconnected and connected events without user intervention, or will I need to be foregrounded and have the user explicitly request reconnection?

    
asked Oct 19, 2015 by okesh.badhiye
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