Supervision timeout is not triggered in corner case

RE: Supervision timeout is not triggered in corner case

Kenneth — Thu, 21 Mar 2019 13:07:03 GMT

You may check out this thread and the linked document in the thread:

https://devzone.nordicsemi.com/b/blog/posts/what-to-keep-in-mind-when-developing-your-ble-andr

RE: Supervision timeout is not triggered in corner case

Matej — Thu, 21 Mar 2019 09:58:22 GMT

Hi,

Actually mentioned behavior is triggered on Samsung devices (S5 android 6.0.1 [a bit harder to trigger] and S8 android 7.0 [easily triggered]) with android version < 8.0. We receive disconnect event after 180 sec even if we disable BLE. In case that we power off smart device we receive disconnect event within 30 sec.

Also tested with Xiaomi MI 6 android 8.0 and Apple iPad and things works as expected – it seems that this is some issue on Samsung with BLE stack.

Any ideas how to proceed… or prevent mobile app developers to trigger that? Except not calling connect sequential if first try of establishing connection from some reason won’t succeed.

Thank you!

BR,
Matej

RE: Supervision timeout is not triggered in corner case

Kenneth — Wed, 20 Mar 2019 15:06:54 GMT

Hi,

According to the experts the connection may be kept alive if other apps are using the connection (including android settings). Usually Android disconnects 1sec after the disconnect is called and no other connection is open (no other app is still connected to this device)

Best regards,
Kenneth