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2009-11-27
, 15:36
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Posts: 129 |
Thanked: 60 times |
Joined on Jul 2009
@ Castello d'Argile (BO)
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#2
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Originally Posted by skomialek
An acceptable way would be to ping it but that would still be polling. Unless all known devices are instructed to reconnect automatically, I guess you can't rely on a passive notification.
The question is: how can I determine if known devices are in range (in a nice way) - any ideas?
| The Following User Says Thank You to aboaboit For This Useful Post: | ||
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2009-11-27
, 15:42
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Posts: 13 |
Thanked: 5 times |
Joined on Oct 2009
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#3
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Originally Posted by aboaboit
Is there any way to simply 'ping' the device using bluez api (I mean without manual connect/disconnect procedure)
An acceptable way would be to ping it but that would still be polling. Unless all known devices are instructed to reconnect automatically, I guess you can't rely on a passive notification.
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2009-11-27
, 15:45
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Posts: 605 |
Thanked: 137 times |
Joined on Nov 2005
@ La Rochelle, France
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#4
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I suppose you could look at BlueProximity ...
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2009-11-27
, 15:53
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Posts: 13 |
Thanked: 5 times |
Joined on Oct 2009
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#5
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Originally Posted by fredoll
Thanks, but I'm not looking for a desktop app. What I'm trying to do is to make maemo based device aware what BT devices are in its range
I suppose you could look at BlueProximity ...
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2009-11-27
, 16:05
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Posts: 1,012 |
Thanked: 817 times |
Joined on Jul 2007
@ France
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#6
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You can simply do a bluetooth scan ... which will give you a list of device at promity with their mac address ... store this and compare.
__________________
Benoît HERVIER, Khertan
KhtEditor - Sdist_Maemo - Khweeteur - PyPackager - KhtSimpleText - KhtNotes - KhtBMA - Wleux - and more ...
Benoît HERVIER, Khertan
KhtEditor - Sdist_Maemo - Khweeteur - PyPackager - KhtSimpleText - KhtNotes - KhtBMA - Wleux - and more ...
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2009-11-27
, 16:12
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Posts: 15 |
Thanked: 48 times |
Joined on Nov 2009
@ United Kingdom
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#7
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Originally Posted by Khertan
Only ones which are set to discoverable. Even if you're paired, but the other device is not discoverable, you won't see it this way.
You can simply do a bluetooth scan ... which will give you a list of device at promity with their mac address ... store this and compare.
Since non-discoverable devices will only respond to direct requests, the only way to see them is with direct requests such as L2CAP echo requests (aka bluetooth ping.) Sure, this is polling, but repeated scans are also a form of polling.
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2009-11-27
, 16:12
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Posts: 605 |
Thanked: 137 times |
Joined on Nov 2005
@ La Rochelle, France
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#8
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Originally Posted by skomialek
I was thinking that you could look the source code ...
Thanks, but I'm not looking for a desktop app. What I'm trying to do is to make maemo based device aware what BT devices are in its range
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2009-11-27
, 16:32
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Posts: 13 |
Thanked: 5 times |
Joined on Oct 2009
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#9
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Originally Posted by Khertan
yes ... this is what i've been do' . it turns out that it lists paired devices but doesn't list connected ones (but those I can check in device properties) . The problem was probably in my other phone's bt power saving properties. If I leave the phone and don't use it it doesn't get detected ... when I was angry that it doesn't get detected I simply removed pairing on both devices and this way bt got awaken
You can simply do a bluetooth scan ... which will give you a list of device at promity with their mac address ... store this and compare.
...sorry for bothering you... problem solved (actually it's never existed..)
Best regards,
Skomialek
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2009-11-27
, 16:34
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Posts: 15 |
Thanked: 48 times |
Joined on Nov 2009
@ United Kingdom
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#10
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Originally Posted by fredoll
http://blueproximity.svn.sourceforge...py?view=markup
I was thinking that you could look the source code ...
It seems to establish an rfcomm connection to the known device, in order to get the signal strength (RSSI) and make an estimation of the distance to the device.
I'm trying to use bluetooth to determine what devices are around me (context awareness). For this purpose I use bluez api in a way that I turn bt on, start device scanning and than I catch signals DeviceFound. The problem is that this signal is emitted only if devices are not paired. If for example I have my computer which has been paired with my phone I won't get signal that this device has been found.
The question is: how can I determine if known devices are in range (in a nice way
My first idea was to try to connect to every possible known device and catch errors but this is not the thing...
Thank you for your answers,
Best regards,
Skomialek