inquiry scan problems

Bluez-users Marco Trudel 3 participants 4 messages Nov 29, 2004 – Nov 30, 2004 Bluetooth drivers

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Marco Trudel

author

2004-11-29 21:38 UTC #0 lore raw

Quoted 2 lines

Quoted 1 line
[my description of the inquiry problems with java (jsr82)]
can your reproduce it without using any JSR-82 stuff?

yes. i tried the inquiries with "hcitool scan".
again, i do 5 and more inquiries in a row with one second sleep between inquiries single "hcitool scan"'s...

here what i noted:
- it needs in average 4 inquiries to get a new device after it's in rainge (4 single "hcitool scan" until it's visible).
- it needs in average 2 inquiries to see that a device is no longer in rainge (or has bluetooth disabled). the first new inquiry usually gives "n/a" as the friendlyName, the second one doesn't list it again. does maybe bluez or my bluetooth dongle cache old inquiries or is there still radiation in the air :-) ?

- during scans, if nothin changes (no new/disappeared devices), the friendlyName changes to n/a for a single inquiry (very rare, but it happens)

- if multiple new devices come in rainge, old devices migt have a n/a friendlyName (the right one comes back in the next scan)

thanks for your time...

kind regards
Marco

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Marcel Holtmann

maintainer

2004-11-29 21:50 UTC #1 lore raw

Hi Marco,

Quoted 4 lines

yes. i tried the inquiries with "hcitool scan".
again, i do 5 and more inquiries in a row with one second sleep between inquiries single "hcitool scan"'s...

Quoted 8 lines

here what i noted:
- it needs in average 4 inquiries to get a new device after it's in rainge (4 single "hcitool scan" until it's visible).
- it needs in average 2 inquiries to see that a device is no longer in rainge (or has bluetooth disabled). the first new inquiry usually gives "n/a" as the friendlyName, the second one doesn't list it again. does maybe bluez or my bluetooth dongle cache old inquiries or is there still radiation in the air :-) ?

for me this sounds more like a job periodic inquiry.

Regards

Marcel

-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now.
http://productguide.itmanagersjournal.com/
_______________________________________________
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Marco Trudel

2004-11-29 21:59 UTC #2 lore raw

Hello Marcel

what do you mean by "job periodic inquiry"?
what is this? i don't know what this means...

kind regards
Marco Trudel

Quoted 23 lines · Marcel Holtmann

Hi Marco,
Quoted 9 lines
yes. i tried the inquiries with "hcitool scan".
again, i do 5 and more inquiries in a row with one second sleep between inquiries single "hcitool scan"'s...
here what i noted:
- it needs in average 4 inquiries to get a new device after it's in
rainge (4 single "hcitool scan" until it's visible).
- it needs in average 2 inquiries to see that a device is no longer in
rainge (or has bluetooth disabled). the first new inquiry usually gives "n/a" as the friendlyName, the second one doesn't list it again. does maybe bluez or my bluetooth dongle cache old inquiries or is there still radiation in the air :-) ?
for me this sounds more like a job periodic inquiry.
Regards
Marcel

Quoted 10 lines