ubuntu-phone team mailing list archive

[Matthias Apitz <guru@xxxxxxxxxxx>]

El día Friday, June 05, 2015 a las 05:51:43PM +0200, Sam Segers escribió:

> These 2 ring mini jacks (sleeve, ring 2, ring 1, tip) are very different.
> The pin is left audio most of the time, the first sleeve is then right
> audio. Most times the sleeve and second ring are used for mic and ground so
> when you put then in a 1 ring mini jack, they are both connected to the
> ground.
> 
> Most commonly, the button on the mic is just a switch between the ground
> and ring 2 with a resistance. And the mic is also connected between ring 2
> and the sleeve. Even with this "standard" the mic resistance and button
> resistance differs.
> 
> Sometimes ring 2 and the sleeve are switched and sometimes there are even
> more exotic things.
> 
> The apple headsets are like the last one but even more complex. The volume
> buttons give a specific signal to indicate a press.
> 
> These are all hardware compatibilities. You can hack/solder them to switch
> the sleeve and ring 2 if that is the issue. That can often be done in the
> mic compartment (if you can disassemble this)
> 
> Pin-out 's can often be found on http://pinoutsguide.com/HeadsetsHeadphones

A good picture and also explanation of the pins is here:

http://apple.stackexchange.com/questions/135967/can-i-use-non-apple-headphones-with-an-iphone

As in my test the audio was fine, it seems that the Apple and the BQ use
the same American Headset Jack (AHJ) pinout: Left Audio, Right Audio, Ground, Mic.
TRRS layout; the rest, i.e. get the +/- and mic buttons working is just
a software issue in the Ubuntu phone, I think; or find another headset
which is compatible with the implementation of the signals in Ubuntu (or Android kernel
layer).

Is there any such device or is there an open issue in our bugtracker?


	matthias
-- 
Matthias Apitz, guru@xxxxxxxxxxx, http://www.unixarea.de/ +49-170-4527211    +49-176-38902045
"Wenn der Mensch von den Umständen gebildet wird, so muß man die Umstände menschlich bilden."
"Si el hombre es formado por las circunstancias entonces es necesario formar humanamente
las circunstancias", Karl Marx in Die heilige Familie / La sagrada familia (MEW 2, 138)