Re: bt question
On Saturday 26 September 2020 09:45:20 Alan Corey wrote:
> I moved the base to my earbuds downstairs and connected to this Pi.
> Some notes:
>
> Some of these things get cached, here B1 shows up twice at different
> addresses:
>
> devices
> Device CB:20:07:42:99:64 B1
> Device F3:66:48:29:CA:7D IDTW211R
> Device FE:46:6D:40:FC:43 B1
> [CHG] Controller B8:27:EB:1F:69:7C Discoverable: no
>
> info FE:46:6D:40:FC:43
> Device FE:46:6D:40:FC:43 (public)
> Name: B1
> Alias: B1
> Class: 0x00240404
> Icon: audio-card
> Paired: no
> Trusted: no
> Blocked: no
> Connected: no
> LegacyPairing: no
> ManufacturerData Key: 0x2549
> ManufacturerData Value:
> 96 52 ef 52 40 dc ca da .R.R@...
> RSSI: -57
>
> trust FE:46:6D:40:FC:43
> [CHG] Device FE:46:6D:40:FC:43 Trusted: yes
> Changing FE:46:6D:40:FC:43 trust succeeded
> [bluetooth]# pair FE:46:6D:40:FC:43
> Attempting to pair with FE:46:6D:40:FC:43
> [CHG] Device FE:46:6D:40:FC:43 Connected: yes
> [CHG] Device FE:46:6D:40:FC:43 Modalias: bluetooth:v05D6p000Ad0240
> [CHG] Device FE:46:6D:40:FC:43 UUIDs:
> 0000110b-0000-1000-8000-00805f9b34fb [CHG] Device FE:46:6D:40:FC:43
> UUIDs: 0000110c-0000-1000-8000-00805f9b34fb [CHG] Device
> FE:46:6D:40:FC:43 UUIDs: 0000110e-0000-1000-8000-00805f9b34fb [CHG]
> Device FE:46:6D:40:FC:43 UUIDs: 0000111e-0000-1000-8000-00805f9b34fb
> [CHG] Device FE:46:6D:40:FC:43 UUIDs:
> 00001124-0000-1000-8000-00805f9b34fb [CHG] Device FE:46:6D:40:FC:43
> UUIDs: 00001200-0000-1000-8000-00805f9b34fb [CHG] Device
> FE:46:6D:40:FC:43 ServicesResolved: yes
> [CHG] Device FE:46:6D:40:FC:43 Paired: yes
> Pairing successful
> [CHG] Device FE:46:6D:40:FC:43 ServicesResolved: no
> [CHG] Device FE:46:6D:40:FC:43 Connected: no
>
> connect FE:46:6D:40:FC:43
> Attempting to connect to FE:46:6D:40:FC:43
> [CHG] Device FE:46:6D:40:FC:43 Connected: yes
> Connection successful
> [CHG] Device FE:46:6D:40:FC:43 ServicesResolved: yes
>
> :info FE:46:6D:40:FC:43
>
> Device FE:46:6D:40:FC:43 (public)
> Name: B1
> Alias: B1
> Class: 0x00240404
> Icon: audio-card
> Paired: yes
> Trusted: yes
> Blocked: no
> Connected: yes
> LegacyPairing: no
> UUID: Audio Sink
> (0000110b-0000-1000-8000-00805f9b34fb) UUID: A/V Remote Control Target
> (0000110c-0000-1000-8000-00805f9b34fb) UUID: A/V Remote Control
> (0000110e-0000-1000-8000-00805f9b34fb) UUID: Handsfree
> (0000111e-0000-1000-8000-00805f9b34fb) UUID: Human Interface Device...
> (00001124-0000-1000-8000-00805f9b34fb) UUID: PnP Information
> (00001200-0000-1000-8000-00805f9b34fb) Modalias:
> bluetooth:v05D6p000Ad0240
> ManufacturerData Key: 0x2549
> ManufacturerData Value:
> 96 52 ef 52 40 dc ca da .R.R@...
> RSSI: -57
>
> rebooting for alsa to maybe pick it up
>
> Still paired?: [yes]
> info FE:46:6D:40:FC:43
> Device FE:46:6D:40:FC:43 (public)
> Name: B1
> Alias: B1
> Class: 0x00240404
> Icon: audio-card
> Paired: yes
> Trusted: yes
> Blocked: no
> Connected: yes
> LegacyPairing: no
> UUID: Audio Sink
> (0000110b-0000-1000-8000-00805f9b34fb) UUID: A/V Remote Control Target
> (0000110c-0000-1000-8000-00805f9b34fb) UUID: Advanced Audio Distribu..
> (0000110d-0000-1000-8000-00805f9b34fb) UUID: A/V Remote Control
> (0000110e-0000-1000-8000-00805f9b34fb) UUID: Handsfree
> (0000111e-0000-1000-8000-00805f9b34fb) UUID: Human Interface Device...
> (00001124-0000-1000-8000-00805f9b34fb) UUID: PnP Information
> (00001200-0000-1000-8000-00805f9b34fb) Modalias:
> bluetooth:v05D6p000Ad0240
>
> alsa didn't find it yet, probably because it's a HID. More research
> needed.
>
> aplay -l
> **** List of PLAYBACK Hardware Devices ****
> card 0: b1 [bcm2835 HDMI 1], device 0: bcm2835 HDMI 1 [bcm2835 HDMI 1]
> Subdevices: 4/4
> Subdevice #0: subdevice #0
> Subdevice #1: subdevice #1
> Subdevice #2: subdevice #2
> Subdevice #3: subdevice #3
> card 1: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones
> [bcm2835 Headphones]
> Subdevices: 4/4
> Subdevice #0: subdevice #0
> Subdevice #1: subdevice #1
> Subdevice #2: subdevice #2
> Subdevice #3: subdevice #3
>
> It's only seeing native Pi stuff. But that's an alsa thing, not a
> bluetooth one. I knew this was a HID device but my phone didn't care,
> it just connected to the audio sink in it. That's what I want the Pi
> to do too, at least now. But according to the advertising these also
> have microphones in them.
>
Which may not be usable as noted below here but recall from your high
school physics classes that any motor is also a generator. And an
earphone is itself also a microphone, but it may not and probably isn't
hooked up with any back path gain that would make it actually usable as
such. The only real exception the the rule that a motor is a generator
is the universally used squirrel cage armature AC motor. They, not
having a magnetically hard iron core, lose around 99.9% of their
generating ability unless a dc current is passed thru the coils, which
will induce a current in its short circuited armature, making an
excellent brake to slow the motor by dumping all that rotational energy
as heat in the relatively massive but short circuited armature. You can
bring a 24,000 rpm motor to essentially a dead stop in much less than a
second by that means. Or a 40 lb lathe chuck from 100 rpm to 100 rpm in
the other direction with only .25 turn of overshoot. I am doing it. But
thats another subject often glossed over by the teacher, who may be
reading a teleprompter script and doesn't understand the physics of it
all. And likely never will, sadly. He makes a very poor teacher
because of that. Should have been re-assigned to teach home-ec or
something less technically well defined like physics. Such a teacher
was part of the reason I quite school in my freshman year and went to
work fixing these new-fangled things called televisions for a living.
That smartass, more interested in George Carlin stand up than actually
teaching didn't understand Newtons third law. That statement of course
dates itself to the later 40's of the last century. Now an old fart?
guilty. :) I'll start a new thread about the 17th of next month if the
gismo I ordered doesn't work. So lets put a ~30~ on this one.
> On 9/26/20, Alan Corey <alan01346@gmail.com> wrote:
> > bluetoothctl's info feature can be useful to see what states devices
> > are in even if you're not pairing with them. Especially devices
> > with few buttons.
> >
> > Yes there's a time limit because being discoverable is considered
> > vulnerable.
> >
> > On 9/26/20, Gene Heskett <gheskett@shentel.net> wrote:
> >> On Saturday 26 September 2020 06:48:11 Alan Corey wrote:
> >>> Bring your devices closer together at least until you get them
> >>> paired. BT doesn't have great range. There are covid tracing
> >>> schemes which figure if you got within BT range you're in danger.
> >>> 20 feet or so should be OK. Also heavy WiFi use disrupts it since
> >>> they're both in the same frequency band.
> >>>
> >>> A device may be discoverable only when it's first turned on but
> >>> there has to be a way. My ear buds have one button each and the
> >>> LEDs flash differently: red and blue instead of just red. It's
> >>> easiest to start with them all within reach until they're set up.
> >>> Playing sound my ear buds aren't 100% reliable 20 feet away. At
> >>> one job a receptionist had a BT headset, they worked within that
> >>> room, not beyond. A niece had a BT headset for hands-free driving
> >>> on her cell phone, mostly didn't work outside her car.
> >>>
> >>> With my ear buds a long press on the one button powers them on and
> >>> makes them discoverable for about 1 minute.
> >>
> >> I wasn't aware there was a time limit. Anyway, the transmitter the
> >> phone will need to pair with is about 3 weeks away, so I'll suggest
> >> we shelve this until that kit arrives.
> >>
> >>> On Sat, Sep 26, 2020, 4:22 AM deloptes <deloptes@gmail.com> wrote:
> >>> > Gene Heskett wrote:
> >>> > > Can anyone else contribute here?
> >>> >
> >>> > for the audio you may need the pulse bluetooth module package.
> >>> > pulseaudio-module-bluetooth
> >>
> >> Cheers, Gene Heskett
> >> --
> >> "There are four boxes to be used in defense of liberty:
> >> soap, ballot, jury, and ammo. Please use in that order."
> >> -Ed Howdershelt (Author)
> >> If we desire respect for the law, we must first make the law
> >> respectable. - Louis D. Brandeis
> >> Genes Web page <http://geneslinuxbox.net:6309/gene>
> >
> > --
> > -------------
> > No, I won't call it "climate change", do you have a "reality
> > problem"? - AB1JX
> > Cities are cages built to contain excess people and keep them from
> > cluttering up nature.
> > Impeach Impeach Impeach Impeach Impeach Impeach Impeach
> > Impeach
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>
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