Re: [Bluez-users] Problems with InputStream and OutputStream

[Johannes <lintner@c-lab.de>]

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Hi,

sorry, but my time run out last week.
I put hcidump -x on, but I'm not familiar with the output, it gives to me.
Perhaps you can help me.
But this might be the section, that is relevant to my problem:

<>> ACL data: handle 0x0029 flags 0x02 dlen 12
    L2CAP(s): Connect req: psm 3 scid 0x0068
< ACL data: handle 0x0029 flags 0x02 dlen 16
    L2CAP(s): Connect rsp: dcid 0x0040 scid 0x0068 result 0 status 0
 > HCI Event: Number of Completed Packets(0x13) plen 5
  01 29 00 01 00
 > ACL data: handle 0x0029 flags 0x02 dlen 12
    L2CAP(s): Config req: dcid 0x0040 flags 0x0000 clen 0
< ACL data: handle 0x0029 flags 0x02 dlen 14
    L2CAP(s): Config rsp: scid 0x0068 flags 0x0000 result 0 clen 0
< ACL data: handle 0x0029 flags 0x02 dlen 16
    L2CAP(s): Config req: dcid 0x0068 flags 0x0000 clen 4
    MTU 1024
 > HCI Event: Number of Completed Packets(0x13) plen 5
  01 29 00 01 00
 > HCI Event: Number of Completed Packets(0x13) plen 5
  01 29 00 01 00
 > ACL data: handle 0x0029 flags 0x02 dlen 18
    L2CAP(s): Config rsp: scid 0x0040 flags 0x0000 result 0 clen 4
    MTU 672
 > ACL data: handle 0x0029 flags 0x02 dlen 8
    L2CAP(d): cid 0x40 len 4 [psm 3]
      RFCOMM(s): SABM: cr 1 dlci 0 pf 1 ilen 0 fcs 0x1c
< ACL data: handle 0x0029 flags 0x02 dlen 8
    L2CAP(d): cid 0x68 len 4 [psm 3]
      RFCOMM(s): UA: cr 1 dlci 0 pf 1 ilen 0 fcs 0xd7
 > HCI Event: Number of Completed Packets(0x13) plen 5
  01 29 00 01 00
 > ACL data: handle 0x0029 flags 0x02 dlen 18
    L2CAP(d): cid 0x40 len 14 [psm 3]
      RFCOMM(s): PN CMD: cr 1 dlci 0 pf 0 ilen 10 fcs 0x70 mcc_len 8
      dlci 2 frame_type 0 credit_flow 15 pri 0 ack_timer 0 frame_size 
667 max_retrans 0 credits 3
< ACL data: handle 0x0029 flags 0x02 dlen 8
    L2CAP(d): cid 0x68 len 4 [psm 3]
      RFCOMM(s): DM: cr 1 dlci 2 pf 1 ilen 0 fcs 0x73
 > HCI Event: Number of Completed Packets(0x13) plen 5
  01 29 00 01 00
 > ACL data: handle 0x0029 flags 0x02 dlen 12
    L2CAP(s): Disconn req: dcid 0x0040 scid 0x0068
< ACL data: handle 0x0029 flags 0x02 dlen 12
    L2CAP(s): Disconn rsp: dcid 0x0040 scid 0x0068
 > HCI Event: Number of Completed Packets(0x13) plen 5
  01 29 00 01 00
< HCI Command: Disconnect(0x01|0x0006) plen 3
  29 00 13
 > HCI Event: Command Status(0x0f) plen 4
  00 01 06 04
 > HCI Event: Disconn Complete(0x05) plen 4
  00 29 00 16

The String I send to the server is 12bytes long, the other String 
6bytes, but I can't find any messages for these Strings.

Greetings Johannes


Marcel Holtmann wrote:

>Hi Johannes,
>
>  
>
>>I have the following problem.
>>I want to communicate from a mobile phone to an PC with the BlueZ-Stack 
>>and backwards.
>>In the beginning, I only want to sent short Strings. the way from the 
>>phone to the PC works, but the way backwards won't run.
>>The server side (PC) tells me, that it send the string (6 bytes long), 
>>the client (phone) do receive a connection, but the transported String 
>>is empty (is.read() = -1).
>>Is it possible, that the BlueZ implementation is the problem? I am sure, 
>>that my source (Java) works correct  (on my opinion the problem can 
>>cause on two reasons: the BlueZ Stack or the Bluetooth-Stack on my 
>>mobile phone).
>>    
>>
>
>go ahead and run "hcidump -x" on the Linux side to see what is going on.
>
>Regards
>
>Marcel
>
>
>
>
>  
>


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