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PacketLogger Question on [HCI COMMAND] LE Connection Update

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PacketLogger Question on [HCI COMMAND] LE Connection Update

Subject: PacketLogger Question on [HCI COMMAND] LE Connection Update
From: Mark Gill <email@hidden>
Date: Thu, 19 Feb 2015 16:27:32 -0500

Hello,

I am issuing a command from a peripheral sensor I'm developing to change the connection interval on OS X. In PacketLogger I see this HCI Event:

[Feb 19 16:21:08.776] [HCI EVENT] LE Meta Event - LE Connection Update Complete

LE Meta Event - LE Connection Update Complete

Parameter Length: 10 (0x0A)

LE Connection Update Complete

Status: 0000

Connection_Handle: 0x0040

Conn_Interval: 0x0018, (30 ms)

Conn_Latency: 0x0002, (60 ms)

Supervision_Timeout: 0x0064, (1000 ms)

Which is setting the interval appropriately. I then get another message not much later setting it to what appears to be the default value of 100 mS.

[Feb 19 16:21:09.076] [HCI COMMAND] [2013] LE Connection Update - Connection Handle: 0x0040

[2013] LE Connection Update - Connection Handle: 0x0040

Opcode: 0x2013 (OGF: 0x08 OCF: 0x13)

Parameter Length: 14 (0x0E)

Connection Handle: 0x0040

Conn Interval Min: 0x0050 (100 ms)

Conn Interval Max: 0x00a0 (200 ms)

Conn Slave Latency: 0x0000 (0)

Supervision Timeout: 0x01F4 (5000 ms)

Minimum CE Length: 0x0000

Maximum CE Length: 0xFFFF

Every message that happens between these two is lised below. I am unable to spot what is causing the second update to occur. Does anyone have any suggestions? This problem does occur every time I connect and use my sensor.

[Feb 19 16:21:08.590] [KERNEL DEBUG] [0xffffff8026cbc000] [IOBluetoothHCIRequest][Start] -- OpCode 0x2013 (LE Connection Update) from: blued (57) Synchronous status: 0x00 (kIOReturnSuccess) state: 2 (BUSY) timeout: 6543

[Feb 19 16:21:08.592] [HCI EVENT] Command Status - LE Connection Update

[Feb 19 16:21:08.593] [KERNEL DEBUG] **** [IOBluetoothHCIController][SendACLData] -- called mWorkLoop->addEventSource(aclMemDescriptor->ACLTimer) -- result = kIOReturnSuccess -- mNumOutstandingACLPackets = 2, aclMemDescriptor = 0xffffff802454d100, timer = 0xffffff802db2b380

[Feb 19 16:21:08.593] [KERNEL DEBUG] **** [IOBluetoothHCIController][SendACLData] -- called aclMemDescriptor->ACLTimer->setTimeoutMS() -- result = kIOReturnSuccess -- Start ACL Packet timer -- mNumOutstandingACLPackets = 2, aclMemDescriptor = 0xffffff802454d100, timer = 0xffffff802db2b380

[Feb 19 16:21:08.593] [ATT Send] Read By Type Request - Start Handle:0x0001 - End Handle:0xffff - UUID:2A00 (Device Name)

[Feb 19 16:21:08.612] [LMP IN] [SEND]Low Energy LL Control PDU LMP Message - [0x00] Connection Update Req

[Feb 19 16:21:08.612] [KERNEL DEBUG] **** [BroadcomBluetoothHostControllerUSBTransport][LMPLoggingBulkInReadHandler] -- mInt2BulkInPipe->Read() success

[Feb 19 16:21:08.657] [HCI EVENT] Number of Completed Packets - Connection Handle: 0x0040 - Packets: 0x0002

[Feb 19 16:21:08.658] [NOTE] **** [IOBluetoothDevice][decrementNumberOfOutstandingPacketsBy] -- calling removeEventSource() -- hostController = 0xffffff801a75b000, mNumOutstandingACLPackets = 3, aclPacket = 0xffffff80244d3000, aclPacket->ACLTimer = 0xffffff801fbd1e00 ****

[Feb 19 16:21:08.658] [NOTE] **** [IOBluetoothDevice][decrementNumberOfOutstandingPacketsBy] -- calling removeEventSource() -- hostController = 0xffffff801a75b000, mNumOutstandingACLPackets = 3, aclPacket = 0xffffff80244d2200, aclPacket->ACLTimer = 0xffffff8019424600 ****

[Feb 19 16:21:08.679] [ATT Receive] Read By Type Response

[Feb 19 16:21:08.680] [KERNEL DEBUG] **** [IOBluetoothHCIController][SendACLData] -- called mWorkLoop->addEventSource(aclMemDescriptor->ACLTimer) -- result = kIOReturnSuccess -- mNumOutstandingACLPackets = 1, aclMemDescriptor = 0xffffff80241ef800, timer = 0xffffff802878c100

[Feb 19 16:21:08.680] [KERNEL DEBUG] **** [IOBluetoothHCIController][SendACLData] -- called aclMemDescriptor->ACLTimer->setTimeoutMS() -- result = kIOReturnSuccess -- Start ACL Packet timer -- mNumOutstandingACLPackets = 1, aclMemDescriptor = 0xffffff80241ef800, timer = 0xffffff802878c100

[Feb 19 16:21:08.680] [ATT Send] Read By Group Type Request - Start Handle:0x0001 - End Handle:0xffff - UUID:2800 (GATT Primary Service Declaration)

[Feb 19 16:21:08.702] [HCI EVENT] Number of Completed Packets - Connection Handle: 0x0040 - Packets: 0x0002

[Feb 19 16:21:08.702] [NOTE] **** [IOBluetoothDevice][decrementNumberOfOutstandingPacketsBy] -- calling removeEventSource() -- hostController = 0xffffff801a75b000, mNumOutstandingACLPackets = 2, aclPacket = 0xffffff802454d100, aclPacket->ACLTimer = 0xffffff802db2b380 ****

[Feb 19 16:21:08.702] [NOTE] **** [IOBluetoothDevice][decrementNumberOfOutstandingPacketsBy] -- calling removeEventSource() -- hostController = 0xffffff801a75b000, mNumOutstandingACLPackets = 2, aclPacket = 0xffffff80241ef800, aclPacket->ACLTimer = 0xffffff802878c100 ****

[Feb 19 16:21:08.724] [ATT Receive] Read By Group Type Response

[Feb 19 16:21:08.725] [KERNEL DEBUG] **** [IOBluetoothHCIController][SendACLData] -- called mWorkLoop->addEventSource(aclMemDescriptor->ACLTimer) -- result = kIOReturnSuccess -- mNumOutstandingACLPackets = 0, aclMemDescriptor = 0xffffff802491b600, timer = 0xffffff801982c500

[Feb 19 16:21:08.725] [KERNEL DEBUG] **** [IOBluetoothHCIController][SendACLData] -- called aclMemDescriptor->ACLTimer->setTimeoutMS() -- result = kIOReturnSuccess -- Start ACL Packet timer -- mNumOutstandingACLPackets = 0, aclMemDescriptor = 0xffffff802491b600, timer = 0xffffff801982c500

[Feb 19 16:21:08.725] [ATT Send] Read By Group Type Request - Start Handle:0x0023 - End Handle:0xffff - UUID:2800 (GATT Primary Service Declaration)

Thank you,

Marko Gill

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