IOS sustainable BT connection with application in background

[alexbutel]

Hi,

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 paired to the OS with a HID service and our application is there to retreive these connection information and trigger actions of the phone.

Does someone have any idea how to keep a sustainable bluetooth connexion on IOS with an application running in background ? Which setting are needed for the application ? How to avoid to be killed by the OS ?

Thanks a lot

Alexandre

[ketil]

Hi Alexandre,

Below is an answer from one of our iOS developers:

Firstly what you need to do is enable background modes and secondly you need to setup a restoration identifier for the CBCentralManager.

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.

These resources might be helpful:

• Communicating with a Bluetooth accessory
• Best Practices for Interacting with a Remote Peripheral Device (see fig 5-1)

Ketil

[alexbutel]

Thanks a lot for your quick answer :)

Alexandre

[ketil]

You are welcome :) If you click on the accepted answer button it would be very helpful. Thank you.