[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=16309173#comment-16309173 ] 

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

Hi all,
An update on our testing regarding this issue:
- We've been able to replicate the issue with the bleprph example & commenting ble_ll_ctrl_proc_start() using iPhone X.
- Have not managed to get a packet trace yet to capture the issue but we found this discussion from someone who had captured a problematic connection via Wireshark: https://forums.developer.apple.com/thread/94365 - how does the NimBle stack respond when device doesnt send the MTU Request




> 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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