How to listen quietly for other Bluetooth devices?

[Mikhail T.]

Doesn't "inquiry" imply activity? I'd like the computer to listen passively... I assume, if a phone nearby is communicating with something (like headphones), other Bluetooth devices hear it - even if they typically ignore it. Is that a valid assumption?

Can a Bluetooth dongle be placed into some sort of "promiscuous" mode instead?
-- 
Sent from mobile device, please, pardon shorthand.

8 лип. 2017 р. о 22:58 Maksim Yevmenkin <maksim.yevmenkin at gmail.com> написав(ла):

> Hi Mikhail,
> 
>> I'd like my FreeBSD computer to detect the presence of other
>> Bluetooth-devices nearby.
> 
> you probably look for inquiry command. i.e. hcidump inquiry. please be
> aware that remote device may not answer inquiry, i.e. "not
> discoverable". apart from inquiry, there is not a whole lot you can do
> with standard hci interface
> 
> thanks!
> max