Re: Unstable HCI connection to Bluetooth on H5550

There does seem to be a stability problem with the h5400 bluetooth.
 I don't really know what's wrong there, but my guess is that
there's some slight incompatibility between the National module and
the H4 implementation in the kernel.

Closing the serial port (by killing hciattach) and reopening again
should cycle power to the module and reset everything to a clean
state.

p.

on Mon, Dec 15, 2003 at 01:49:31AM -0800, Gianpaolo Macario wrote:
> Hello,
>
> I have flashed my iPAQ H5550 with familiar-0.7.2
> (bootopie-v0.7.2-h3900.tar), then upgraded to kernel
> hh33 (http://familiar.handhelds.org/feeds/2.4.19)
> and installed Bluez packages.
>
> I managed to communicate to Bluetooth module:
>
> [root_at_h5550-immse1 /root]# hciattach /dev/tts/1 any
> 921600
>
> [root_at_h5550-immse1 /root]# hciconfig
> hci0: Type: UART
> BD Address: 08:00:17:1D:61:9E ACL MTU: 339:4
> SCO MTU: 60:9
> UP RUNNING PSCAN ISCAN AUTH
> RX bytes:76 acl:0 sco:0 events:9 errors:0
> TX bytes:298 acl:0 sco:0 commands:10 errors:0
>
> [root_at_h5550-immse1 /root]# hciconfig hci0 version
> hci0: Type: UART
> BD Address: 08:00:17:1D:61:9E ACL MTU: 339:4
> SCO MTU: 60:9
> HCI Ver: 1.1 (0x1) HCI Rev: 0x180 LMP Ver: 1.1
> (0x1) LMP Subver: 0x180
> Manufacturer: RTX Telecom A/S (21)
>
> [root_at_h5550-immse1 /root]# hciconfig hci0 revision
> hci0: Type: UART
> BD Address: 08:00:17:1D:61:9E ACL MTU: 339:4
> SCO MTU: 60:9
> Unsupported manufacturer
>
> [root_at_h5550-immse1 /root]# hciconfig hci0 features
> hci0: Type: UART
> BD Address: 08:00:17:1D:61:9E ACL MTU: 339:4
> SCO MTU: 60:9
> Features: 0x00 0x00 0x00 0x00
>
>
> Nevertheless the HCI connection is quite unstable -
> after a few commands I get timeout errors and cannot
> recover.
> I tried "hciconfig hci0 reset" but it did not work.
>
> Is there a method to reset the BT module, i.e.
> powering down the module, etc.?
>
> Has anyone stress tested the BT interface on the
> H5550?
>
> Thank you very much in advance
>
> Gianpaolo Macario
>
>
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Received on Mon Dec 15 2003 - 10:28:44 EST