IOS sustainable BT connection with application in backgroundhttps://devzone.nordicsemi.com/f/nordic-q-a/27296/ios-sustainable-bt-connection-with-application-in-backgroundHi, We face an issue since some days, i hope you will be able to help us. We try to keep a BT connection between in nrf51822 chip and an IOS application put in background. But after a while the OS always kill our app to free memory. We are paireden-USTelligent Community 13Fri, 17 Nov 2017 11:45:42 GMTRE: IOS sustainable BT connection with application in backgroundhttps://devzone.nordicsemi.com/thread/107839?ContentTypeID=1Fri, 17 Nov 2017 11:45:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f83102d5-6b77-4fed-b978-f536efac5222ketil<p>You are welcome :) If you click on the accepted answer button it would be very helpful. Thank you.</p><div style="clear:both;"></div>RE: IOS sustainable BT connection with application in backgroundhttps://devzone.nordicsemi.com/thread/107838?ContentTypeID=1Fri, 17 Nov 2017 08:14:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:890fd0c0-e55e-462b-95e3-8f8dcf66a6f4alexbutel<p>Thanks a lot for your quick answer :)</p> <p>Alexandre</p><div style="clear:both;"></div>RE: IOS sustainable BT connection with application in backgroundhttps://devzone.nordicsemi.com/thread/107837?ContentTypeID=1Thu, 16 Nov 2017 13:42:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:74848f2a-abab-4882-bd5e-78c7bab9f523ketil<p>Hi Alexandre,</p> <p>Below is an answer from one of our iOS developers:</p> <blockquote> <p>Firstly what you need to do is enable background modes and secondly you need to setup a restoration identifier for the CBCentralManager.</p> <p>Then the app quit will not cause a peripheral disconnect, and in edge cases where iOS kills the app for memory , the restoration identifier will let it relaunch the app in background and give back the connection to the app as soon as it restarts, in all cases the peripheral will be always connected.</p> </blockquote> <p>These resources might be helpful:</p> <ul> <li><a href="https://developer.apple.com/library/content/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/BackgroundExecution/BackgroundExecution.html#//apple_ref/doc/uid/TP40007072-CH4-SW54">Communicating with a Bluetooth accessory</a></li> <li><a href="https://developer.apple.com/library/content/documentation/NetworkingInternetWeb/Conceptual/CoreBluetooth_concepts/BestPracticesForInteractingWithARemotePeripheralDevice/BestPracticesForInteractingWithARemotePeripheralDevice.html">Best Practices for Interacting with a Remote Peripheral Device</a> (see fig 5-1)</li> </ul> <p>Ketil</p><div style="clear:both;"></div>