NRF52840 static key pairing with iOS problem

[arditdv]

I'm using a nrf52840dk as peripheral and iOS (iPhone 8) as a central. They are to be paired. The pairing routine is already implemented and works fine. The problem is that when I try to connect for the first time with nrf52840 via nrfConnect, the iOS device disconnects despite a successful pairing. If I try to connect again, it connects. That means the pairing was also successful on iOS.
This doesn't happen on Android devices. I already tested that with two different android devices.
I would appreciate any information, why this is happening.

Best regard

Ardit

[Vidar Berg]

Hi Ardit,

I believe it may be related to the bug reported in this thread: https://devzone.nordicsemi.com/f/nordic-q-a/51706/disconnected-when-connected-with-lesc. The bug has been reported, but not fixed yet. You may try with a different BT app if you want to confirm, Lightblue for instance. 

Best regards,

Vidar