shearwater Perdix AI

[Anton Lundin]

It would probably be a bit tricky to plumb bt le into libdivecomputer.
It would be way easier with the custom-serial patches I wrote for
Subsurface.

It would probably be simpler to do it in Subsurface, using a custom
serial which uses Qt's QLowEnergy.


You could test with the Qt example
http://doc.qt.io/qt-5/qtbluetooth-lowenergyscanner-example.html , too
see how well the qt bt le works on your platform together with the new
Perdix AI.


Then it comes down to: Do we think the protocol is the same over bt le
as it was over bt spp?


//Anton


On 30 November, 2016 - Jon Gross wrote:

> So it looks like getting a connection to bluetooth LE devices isn't present
> in libdivecomputer - are there any current plans for this type of
> functionality to be implemented?  It seems like a major addition, since
> there essentially isn't a Serial Port Profile in LE.
> 
> On Wed, Nov 30, 2016 at 1:44 PM Jon Gross <jong at jongrossphotography.com>
> wrote:
> 
> > Hey Janice,
> >
> > Yeah, I've been coming up to speed on the difference between bluetooth LE
> > and 'classic' bluetooth and realizing that I've been asking the wrong
> > questions.
> >
> > Thanks for confirming my suspicions.
> >
> >
> >
> > On Wed, Nov 30, 2016 at 1:42 PM Janice McLaughlin <janice at somemore.com>
> > wrote:
> >
> > The Shearwater website says that the Perdix AI requires Bluetooth LE.
> > There is no “pairing” per se in LE, it’s just communication and looking for
> > specific CBUUID’s or unique numbers that a peripheral advertises that it
> > does. There are no real “profiles” in LE either so there is no "serial port
> > profile" so no serial port for libdivecomputer to use.
> >
> > Janice
> >
> > > On Nov 30, 2016, at 12:07 PM, Jon Gross <jong at jongrossphotography.com>
> > wrote:
> > >
> > > One other note:
> > >
> > > The Perdix AI uses bluetooth LE (smart?), which apparently (I'm still
> > coming up to speed on the  on bluetooth) requires the pairing to happen via
> > the software, rather than pairing via the OS bluetooth controls as 'older'
> > bluetooth does?
> > >
> > > I'm reading through the libdivecomputer sources, and I'm not seeing any
> > reference to code that does this initial device communication, but I might
> > not have found it yet.
> > >
> > > Is native bluetooth on OS X a thing in libdivecomputer, or does
> > libdivecomputer still require a serial port?
> > >
> > > If it requires a serial port, then I think I'm stuck before I start,
> > since I don't see a way to get the device paired and a serial port set up
> > before trying to run the dctool downloads.
> > >
> > >
> > >
> > > -jon
> > >
> > > On Wed, Nov 30, 2016 at 9:00 AM Jon Gross <jong at jongrossphotography.com>
> > wrote:
> > >
> > > I forgot to bring it to work with me this morning, but I'll give this a
> > whirl when I get home, thank you.
> > >
> > > -jon
> > >
> > > On Wed, Nov 30, 2016 at 2:34 AM Jef Driesen <jef at libdivecomputer.org>
> > wrote:
> > > On 2016-11-30 08:25, Anton Lundin wrote:
> > > > On 29 November, 2016 - Jon Gross wrote:
> > > >
> > > >> I have in my greedy little hands a Shearwater Perdix AI computer,
> > > >> which
> > > >> Shearwater says shares the same firmware with the Perdix and the
> > > >> Petrel,
> > > >> but it will have air consumption (if equipped with a sender).
> > > >>
> > > >> Is there anything I can send a developer that would help with support
> > > >> or
> > > >> this?  I didn't see it in the list of supported computers.
> > > >>
> > > >
> > > > As far as I've read between the lines, there is a new protocol for
> > > > downloading data containing the pressure sensor. The old sample format
> > > > have no space left for any more data to be added to it.
> > > >
> > > > I guess that the new device still supports the older download protocols
> > > > from the Predator and Petrel, so just try do select Petrel and
> > > > download.
> > > > You should get logs from your computer, but without data from the
> > > > pressure sensor.
> > >
> > > Indeed, try first with the petrel protocol to see what we get there:
> > >
> > > dctool -v -l petrel.log -f petrel download -f raw -o dive.%n.bin
> > > <serialport>
> > >
> > > This will dump the individual dives to disk and allow us to have a look
> > > at the raw data.
> > >
> > > Jef
> > > _______________________________________________
> > > devel mailing list
> > > devel at libdivecomputer.org
> > > http://libdivecomputer.org/cgi-bin/mailman/listinfo/devel
> >
> >

-- 
Anton Lundin	+46702-161604