Thread: BLUEZ: How to determine if known device is reachable
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ali1234 is offline ali1234
2009-11-27 , 16:12
Posts: 15 | Thanked: 48 times | Joined on Nov 2009 @ United Kingdom
#7
Originally Posted by Khertan View Post
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.
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.

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.