[Bluez-users] Receiving multiple (>2) incoming rfcomm connections?

[Bluez-users] Receiving multiple (>2) incoming rfcomm connections?

[Heikki Vuolteenaho]

Hi all,

I'm trying to create a simple application that receives incoming rfcomm 
connections from Nokia Series60 phones and listens for incoming data.

This is how I'm doing it currently:

for (i = 1...n) {
   Listen on channel 1, rfcomm port i (rfcomm listen i)
   Wait until incoming connection received
   Start a new thread that handles incoming data on /dev/rfcomm<i>
}


For one or two connections, it works ok. However, when I try to connect 
a third device, nothing happens. Nothing shows up even on hcidump when I 
try to connect the third phone. On the phone I receive error 
EPageTimedOut(-6004), which according to my friend means that the phone 
could not get any kind of connection.

Any ideas why it's not working? Thanks in advance,

-Hege-



Setup details:
-Compaq Evo laptop with Debian
-Conceptronic USB BT (CSR)
-Various Nokia phones (6630, 6600, Ngage, 3650)
-Python pyserial module for reading the serial port



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Re: [Bluez-users] Receiving multiple (>2) incoming rfcomm connections?

[Marcel Holtmann]

Hi Hege,

> I'm trying to create a simple application that receives incoming rfcomm 
> connections from Nokia Series60 phones and listens for incoming data.
> 
> This is how I'm doing it currently:
> 
> for (i = 1...n) {
>    Listen on channel 1, rfcomm port i (rfcomm listen i)
>    Wait until incoming connection received
>    Start a new thread that handles incoming data on /dev/rfcomm<i>
> }
> 
> 
> For one or two connections, it works ok. However, when I try to connect 
> a third device, nothing happens. Nothing shows up even on hcidump when I 
> try to connect the third phone. On the phone I receive error 
> EPageTimedOut(-6004), which according to my friend means that the phone 
> could not get any kind of connection.

your device must become master of the piconet and the phones should
support the role switch.

> -Conceptronic USB BT (CSR)

What does "hciconfig -a" say?

> -Various Nokia phones (6630, 6600, Ngage, 3650)

Check "hcitool info ..." for these phones.

Regards

Marcel




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Re: [Bluez-users] Receiving multiple (>2) incoming rfcomm connections?

[Heikki Vuolteenaho]

Marcel Holtmann wrote:
> 
> your device must become master of the piconet and the phones should
> support the role switch.
> 

You mean the USB BT device should take master role? Any pointers on how 
this is done? Or some good documents, I guess I'll have to study a bit 
more on this...


> 
>>-Conceptronic USB BT (CSR)
> 
> 
> What does "hciconfig -a" say?
> 

hci0:
Type: USB
BD Address: 00:80:5A:30:0C:C6 ACL MTU: 192:8  SCO MTU: 64:8
UP RUNNING PSCAN ISCAN
RX bytes:59492 acl:1641 sco:0 events:2235 errors:0
TX bytes:21545 acl:1193 sco:0 commands:432 errors:0
Features: 0xff 0xff 0x0f 0x00 0x00 0x00 0x00 0x00
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH HOLD SNIFF PARK
Link mode: SLAVE ACCEPT
Name: 'lp007-0'
Class: 0x000100
Service Classes: Unspecified
Device Class: Computer, Uncategorized
HCI Ver: 1.1 (0x1) HCI Rev: 0x460 LMP Ver: 1.1 (0x1) LMP Subver: 0x460
Manufacturer: Cambridge Silicon Radio (10)



> 
>>-Various Nokia phones (6630, 6600, Ngage, 3650)
> 
> 
> Check "hcitool info ..." for these phones.
> 

BD Address:  00:60:57:3B:E0:52
Device Name: Nokia 3650
LMP Version: 1.1 (0x1) LMP Subversion: 0x23c
Manufacturer: Nokia Mobile Phones (1)
Features: 0xbf 0x28 0x21 0x00 0x00 0x00 0x00 0x00
           <3-slot packets> <5-slot packets> <encryption> <slot offset>
           <timing accuracy> <role switch> <sniff mode> <SCO link>
           <HV3 packets> <CVSD>


BD Address:  00:11:9F:BD:9B:2E
Device Name: Nokia 6630
LMP Version: 1.2 (0x2) LMP Subversion: 0x4db
Manufacturer: Cambridge Silicon Radio (10)
Features: 0xbf 0xfe 0x0f 0x00 0x18 0x18 0x00 0x00
           <3-slot packets> <5-slot packets> <encryption> <slot offset>
           <timing accuracy> <role switch> <sniff mode> <RSSI>
           <channel quality> <SCO link> <HV2 packets> <HV3 packets>
           <u-law log> <A-law log> <CVSD> <paging scheme> <power control>
           <transparent SCO> <AFH cap. slave> <AFH class. slave>
           <AFH cap. master> <AFH class. master>



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Re: [Bluez-users] Receiving multiple (>2) incoming rfcomm connections?

[Heikki Vuolteenaho]

Heikki Vuolteenaho wrote:
> Marcel Holtmann wrote:
> 
>>
>> your device must become master of the piconet and the phones should
>> support the role switch.
>>
> 
> You mean the USB BT device should take master role? Any pointers on how 
> this is done? Or some good documents, I guess I'll have to study a bit 
> more on this...
> 

Searching the web (http://www.phptr.com/articles/article.asp?p=21324) 
and mailing list archive helped, I just changed the link mode to 
master,accept and now it's working. Thanks!

-Hege-



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