Re: Problems with incoming connection request on Nexus 4

[Florian Grandel <fgrandel@gmail.com>]

Hi Marcel,

 >> Symptoms:
>> - The connection request times out.
>> - bt_io_accept() is being called but the accept_cb (=connect_cb) only gets called when the request times out.
>> - the device is stuck in the CONNECT READY state and never reaches the CONNECTED state
>>
>>
>> Any ideas how I could analyze/solve that problem? I'm stuck on this for many hours already...
>
> what does btmon actually tell you about what is going on with HCI.

= New Index: 10:68:3F:56:AD:35 (BR/EDR,UNKNOWN,hci0)            [hci0] 
0.629837
@ Advertising Added: 1
< HCI Command: LE Set Advertising Para.. (0x08|0x0006) plen 15  [hci0] 
4.398493
         Min advertising interval: 1280.000 msec (0x0800)
         Max advertising interval: 1280.000 msec (0x0800)
         Type: Connectable undirected - ADV_IND (0x00)
         Own address type: Public (0x00)
         Direct address type: Public (0x00)
         Direct address: 00:00:00:00:00:00 (OUI 00-00-00)
         Channel map: 37, 38, 39 (0x07)
         Filter policy: Allow Scan Request from Any, Allow Connect 
Request from Any (0x00)
 > HCI Event: Command Complete (0x0e) plen 4                     [hci0] 
4.401392
       LE Set Advertising Parameters (0x08|0x0006) ncmd 1
         Status: Success (0x00)
< HCI Command: LE Set Advertise Enable (0x08|0x000a) plen 1     [hci0] 
4.401484
         Advertising: Enabled (0x01)
 > HCI Event: Command Complete (0x0e) plen 4                     [hci0] 
4.402277
       LE Set Advertise Enable (0x08|0x000a) ncmd 1
         Status: Success (0x00)

There is no connection related HCI activity going on at all on the Nexus 
4 side. You can see from the debug logs that I sent before, that the 
connection is being initiated correctly. The bt_io_accept() call does 
return without error, just the accept callback never gets called. To me 
it seems as if the Nexus4 was not responding to the incoming connect 
request.

 > Remember that a connection disables advertising in the controller.

The advertising being aborted on connect is not a problem. The 
advertising part works flawlessly. Connecting

Florian