Re: bt question

I don't think they go to sleep that fast, they just stop being discoverable. The 30 year old engineer that designed them thought that would be plenty of time. My pi kept going non-discoverable about 4 times as I was sitting in front of it. This phone stays discoverable as long as the Bluetooth settings screen is up, it says.

I've gotten nowhere in getting any HID device working with Linux so far. I have a little cheapie USB microphone ($1.50) that's also an hid, it doesn't work either. No Bluetooth involved, it just plugs into a USB jack. HID is another layer. But people do it, the visors that people into wearable computers use are hid I think. The device name becomes longer because it's device.subdevice. Except not with a period.

On Sat, Sep 26, 2020, 1:14 PM Gene Heskett <gheskett@shentel.net> wrote:

On Saturday 26 September 2020 08:23:14 Alan Corey 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.

I wonder if this keyboard is timeing out while I am walking the 50 feet
from turning it on, back to this ssh console to type show. Would it be
that fast? Or do these cellphone apps I have no way to run, have a
wakeup call they send? In which case, can bluetoothctl trigger that
wakeup?

> 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>

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>