[jira] [Commented] (MYNEWT-857) BLE Controller - incompatibility with iPhone 8 (and iPhone X?)

["Lance Cohen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MYNEWT-857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16295986#comment-16295986 ] 

Lance Cohen commented on MYNEWT-857:
------------------------------------

Hi Chris,
1. Models tested so far are iPhone 7 and X. We have some older versions (5 & 6) which we will try to repro the issue on as well.
2. From our experience, the issue seems to be more related to iOS 11 rather than phone hardware as prior to iOS11 ous phone-device interactions did not trigger this issue. There are known high profile issues with iOS 11 (eg: the likes of Garmin having problems - with phones losing connections etc) the question is what could trigger the issue/state where the phone's BT stack goes wacky. Apple should really address this but hopefully we can get to the bottom of what triggers this state.
3. Unfortunately not, behavior is the same.
4. As mentioned we will try to isolate things and have a similar test setup to yours testing with nRF52 and the running bleprph. I will provide an update on this testing when I have one.

> BLE Controller - incompatibility with iPhone 8 (and iPhone X?)
> --------------------------------------------------------------
>
>                 Key: MYNEWT-857
>                 URL: https://issues.apache.org/jira/browse/MYNEWT-857
>             Project: Mynewt
>          Issue Type: Task
>      Security Level: Public(Viewable by anyone) 
>          Components: Nimble
>            Reporter: Christopher Collins
>             Fix For: v1.3
>
>         Attachments: ios2nimble-no-feat.pcap, ios2nimble.pcap, nimble_ios_1033.btt, nimble_ios_1103.btt
>
>
> Master: iPhone running iOS 11
> Slave: NimBLE device
> The iPhone successfully establishes a connection to the NimBLE device, but the CoreBluetooth {{didConnect()}} callback does not get called.  A packet trace (see attached {{ios2nimble.pcap}} file) shows that the iPhone never initiates service discovery.
> The problem seems to occur when the NimBLE controller initiates the Feature Exchange Procedure immediately after connection establishment. The {{LL_SLAVE_FEATURE_REQ}} PDU appears to cause a problem for the iOS device.  When I comment out the call to {{ble_ll_ctrl_proc_start()}} at the bottom of {{ble_ll_conn_created()}}, the iOS device is able to connect and perform service discovery, resulting in the CoreBluetooth callback being executed.
> In the attached pcap file {{ios2nimble.pcap}}, the CONNECT_REQ is at packet #6211.



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