[SailfishDevel] Bluetooth battery level monitoring

Pali Rohár pali.rohar at gmail.com
Sat Dec 14 07:50:11 UTC 2019


On Saturday 14 December 2019 08:28:33 deloptes wrote:
> Pali Rohár wrote:
> 
> > HFP is used in cars because of telephony stack. HFP allows to control
> > mobile calls (answer / hold / dial / ...) and basically very different
> > use case as "receiving voice from microphone" (which is in what users
> > want from headphones).
> > 
> 
> I raised the question because I wonder if the HFP is compatible with head
> phones at all? Why would you need HFP on a headphone - it doesn't have a
> microphone. If it would have microphone, would be HSP

I have not seen headset without HFP profile for a very long time...
Basically every one has support for it.

> > But because all those telephony related functions are core part of HFP
> > protocol and without them it is not possible to activate HFP transfer
> > (even if I want just samples from microphone) I have included it in my
> > HFP proposed HFP API via pluggable Telephony Agent.
> 
> So you definitely have a headset with HFP?

Yes... and important new headsets do not support HSP profile and
therefore it is needed to implement HFP profile. This is reason why HFP
is important in these days.

> I've been playing with my PC and Xperia - I can dial from PC, or close the
> call - basically what is in the interface spec - works fine. PC is with
> bluez5.
> 
> If I have time in the feature I would like to try your PoC - when will this
> be possible I can't say - but I saved the links.

-- 
Pali Rohár
pali.rohar at gmail.com
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