[Bluez-users] cannot cat /dev/bluetooth/rfcomm/0

[Bluez-users] cannot cat /dev/bluetooth/rfcomm/0

[Peppe Colicchia]

Hi all,
my ipaq 3870 (with a built-in bluetooth device) is running Familiar Linux 
0.8.2 with OPIE, i would like to use it with a GPS device (Nemerix BT77 
chipset). I was able to get NMEA output time ago, now i'm trying again but 
maybe i'm missing something - so please tell me where i'm wrong: 

root@h3600:~# hciconfig -a
hci0:   Type: UART
       BD Address: 00:02:C7:0C:AA:B5 ACL MTU: 128:8 SCO MTU: 64:8
       UP RUNNING PSCAN ISCAN AUTH ENCRYPT
       RX bytes:929 acl:13 sco:0 events:34 errors:0
       TX bytes:985 acl:12 sco:0 commands:16 errors:0
       Features: 0xff 0xff 0x05 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: 'No name'
       Class: 0x120112
       Service Classes: Networking
       Device Class: Computer, Handheld
       HCI Ver: 1.1 (0x1) HCI Rev: 0x72 LMP Ver: 1.1 (0x1) LMP Subver: 0x72
       Manufacturer: Cambridge Silicon Radio (10)
root@h3600:~# cat /etc/bluetooth/rfcomm.conf
rfcomm0 {
       bind yes;
       device 00:08:1B:8C:3F:A2;
       channel 1;
       comment "BT device";
}
root@h3600:~# cat /etc/bluetooth/pin
0000
root@h3600:~# rfcomm
rfcomm0: 00:08:1B:8C:3F:A2 channel 1 clean
root@h3600:~# hcitool scan
Scanning ...
       00:08:1B:8C:3F:A2       BT GPS
root@h3600:~# ps aux
 -cut-
 788 root        584 S   hcid: processing events
 794 root        532 S   /sbin/sdpd
 988 root        368 S   hciattach -p /dev/ttySB0 bcsp 230400
 -cut-
root@h3600:~# cat /dev/bluetooth/rfcomm/0 

blank. nothing, no output. Time ago with the same O.S. version i was able to 
see the NMEA output, so i used gpsd and a navigator. CTRL-C and... 

root@h3600:~# rfcomm
rfcomm0: 00:08:1B:8C:3F:A2 channel 1 closed 

where is the mistake? any help is appreciated. I have not the hcidump tool 
for my PDA (StrongARM cpu). 

Regards,
Peppe Colicchia 



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Re: [Bluez-users] cannot cat /dev/bluetooth/rfcomm/0

[Niv]

what does this do:

# l2ping 00:08:1B:8C:3F:A2


I would also look if they actually are paired


Niv


P.s.

First replay to ML


Peppe Colicchia wrote:

> Hi all,
> my ipaq 3870 (with a built-in bluetooth device) is running Familiar 
> Linux 0.8.2 with OPIE, i would like to use it with a GPS device 
> (Nemerix BT77 chipset). I was able to get NMEA output time ago, now 
> i'm trying again but maybe i'm missing something - so please tell me 
> where i'm wrong:
> root@h3600:~# hciconfig -a
> hci0:   Type: UART
>       BD Address: 00:02:C7:0C:AA:B5 ACL MTU: 128:8 SCO MTU: 64:8
>       UP RUNNING PSCAN ISCAN AUTH ENCRYPT
>       RX bytes:929 acl:13 sco:0 events:34 errors:0
>       TX bytes:985 acl:12 sco:0 commands:16 errors:0
>       Features: 0xff 0xff 0x05 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: 'No name'
>       Class: 0x120112
>       Service Classes: Networking
>       Device Class: Computer, Handheld
>       HCI Ver: 1.1 (0x1) HCI Rev: 0x72 LMP Ver: 1.1 (0x1) LMP Subver: 
> 0x72
>       Manufacturer: Cambridge Silicon Radio (10)
> root@h3600:~# cat /etc/bluetooth/rfcomm.conf
> rfcomm0 {
>       bind yes;
>       device 00:08:1B:8C:3F:A2;
>       channel 1;
>       comment "BT device";
> }
> root@h3600:~# cat /etc/bluetooth/pin
> 0000
> root@h3600:~# rfcomm
> rfcomm0: 00:08:1B:8C:3F:A2 channel 1 clean
> root@h3600:~# hcitool scan
> Scanning ...
>       00:08:1B:8C:3F:A2       BT GPS
> root@h3600:~# ps aux
> -cut-
> 788 root        584 S   hcid: processing events
> 794 root        532 S   /sbin/sdpd
> 988 root        368 S   hciattach -p /dev/ttySB0 bcsp 230400
> -cut-
> root@h3600:~# cat /dev/bluetooth/rfcomm/0
> blank. nothing, no output. Time ago with the same O.S. version i was 
> able to see the NMEA output, so i used gpsd and a navigator. CTRL-C 
> and...
> root@h3600:~# rfcomm
> rfcomm0: 00:08:1B:8C:3F:A2 channel 1 closed
> where is the mistake? any help is appreciated. I have not the hcidump 
> tool for my PDA (StrongARM cpu).
> Regards,
> Peppe Colicchia
>
>
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[Bluez-users] Re: cannot cat /dev/bluetooth/rfcomm/0

[Peppe Colicchia]

> what does this do: 
> 
> # l2ping 00:08:1B:8C:3F:A2

root@h3600:~# l2ping 00:08:1B:8C:3F:A2
Ping: 00:08:1B:8C:3F:A2 from 00:02:C7:0C:AA:B5 (data size 20) ...
44 bytes from 00:08:1B:8C:3F:A2 id 0 time 50.98ms
44 bytes from 00:08:1B:8C:3F:A2 id 1 time 38.50ms
44 bytes from 00:08:1B:8C:3F:A2 id 2 time 33.82ms
44 bytes from 00:08:1B:8C:3F:A2 id 3 time 32.46ms
44 bytes from 00:08:1B:8C:3F:A2 id 4 time 31.29ms
5 sent, 5 received, 0% loss 

> I would also look if they actually are paired

I think the devices are paired: isn't it an operation that i have to do only 
once? I say this cause i was able to use the GPS receiver without problems. 
Now i'm trying several version of Familiar (from 0.8.2-stable to 
0.8.3-snapshots and release candidate) without luck. 

How could i pair again the devices? 

> 
> Niv 
> 

Thanks Niv. 

> 
> P.s. 
> 
> First replay to ML 
> 
> 

Regards, Peppe Colicchia


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