PAN and RFCOMM
Dear all
I am writing a file transfer program though rfcomm to my device. But
I found that whenever my device connected with a bluetooth access point, the connect/transfer/disconnect actions are all very slow. Is it the restriction on the bluetooth protocol/baseband or i should set something before any connections?
Here is the result of hciconfig -a
hci0: Type: UART
BD Address: 00:08:E0:04:A4:BF ACL MTU: 192:8 SCO MTU: 64:8 UP RUNNING PSCAN ISCAN
RX bytes:373706 acl:4542 sco:0 events:1669 errors:0 TX bytes:323342 acl:2083 sco:0 commands:85 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: 'testing'
Class: 0x080100
Service Classes: Capturing
Device Class: Computer, Uncategorized
HCI Ver: 1.1 (0x1) HCI Rev: 0x20d LMP Ver: 1.1 (0x1) LMP Subver:0x20d
Manufacturer: Cambridge Silicon Radio (10)
THX
Mike,Lee
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Marcel Holtmann
maintainerHi,
Quoted 5 lines
I am writing a file transfer program though rfcomm to my device. But
I found that whenever my device connected with a bluetooth access point, the connect/transfer/disconnect actions are all very slow. Is it the restriction on the bluetooth protocol/baseband or i should set something before any connections?
this can be and depends on the chips of the other devices. However the HCI 16.4 of your local adapter is not bad, but still quite old.
Regards
Marcel
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Hi Marcel
Quoted 12 lines · Marcel Holtmann
Hi,
Quoted 7 lines
I am writing a file transfer program though rfcomm to my device. But
I found that whenever my device connected with a bluetooth access point, the connect/transfer/disconnect actions are all very slow. Is it the restriction on the bluetooth protocol/baseband or i should set something before any connections?
Quoted 2 lines
this can be and depends on the chips of the other devices.
That means it is restricted by the CSR chip. It is too bad
Quoted 4 lines
However the
HCI 16.4 of your local adapter is not bad, but still quite old.
I am now using 2.12 utils. I will change it later Because it seem to be a problem on bluetooth architechure, I choose
to turn bnep off whenever there is rfcomm connection. But i find that when i disconnect bnep several time by "pand -K" a kernel error message come out "unregister_netdevice: waiting for bnep0 to become free. Usage count = 1".
Do i need to close all the network application first?
Thx for helping
Mike,Lee
Quoted 7 lines
Regards
Marcel
Quoted 11 lines
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Marcel Holtmann
maintainerHi,
Quoted 3 lines
Quoted 2 lines
this can be and depends on the chips of the other devices.
That means it is restricted by the CSR chip. It is too bad
it can be, but in general using CSR chips are less problematic.
Quoted 7 lines
I am now using 2.12 utils. I will change it later Because it seem to be a problem on bluetooth architechure, I choose
to turn bnep off whenever there is rfcomm connection. But i find that when i disconnect bnep several time by "pand -K" a kernel error message come out "unregister_netdevice: waiting for bnep0 to become free. Usage count = 1".
Do i need to close all the network application first?
If you wanna make this error go away, then yes.
Regards
Marcel
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