Missing pO2 samples from CCR download [was: 4.7.8: a couple of questions]

[Davide DB]

Hi Dirk,

I'm sure that this problem will solved.
It's clear that is anyway a Shearwater problem or an undocumented feature.
The interim solution proposed by Anton is already a good step forward.
BTW you will not find a patch: Anton just posted a "diff". You will
find everything here:

https://github.com/Subsurface-divelog/subsurface/issues/971

As you see my report is dated back on december 2017. I cannot blame
nobody except my self for being lenient checking my profiles after
discovering that bug. On the other side I know well how open-source
projects works. People write code or generally help (like me) for what
is important for themselves and not so quickly for other things that
are not so important for themselves. No one gets paid for the work, so
one cannot force anybody.
Hence this bug was thought provoking for me. I've been always a
minority but with a divecan shearwater controller I thought I was
mainstream but I was wrong. This bug hit me hard. I have over 60 ccr
maniacally logged dives with completely wrong or missing pO2 samples.
A CCR dive without pO2 samples is like a cake with no sugar. If I
still have them on my Petrel (I never investigated how many profiles
it stores) I should import everything from scratch into Subsurface and
compile everything again. Not a nice perspective for the future. Right
now I'm diving two/three times per week so the count will increase
rapidly. I've tons of notes, wrecks positions, all dives have GPS
locations... I think I will use Shearwater desktop for the time being
and leave old dives in Subsurface. When a complete solution will be
found I will evaluate how much effort is needed to realign everything
because I do not see a real solution coming soon.
Anton (and now Aaron) patches are blessed workarounds but  don't solve
the inner problem:  for some mysterious reason, on some devices we
cannot use/decode Shearwater data.
Moreover other questions remained unanswered; In one year my unique
Petrel was identified as 3 different devices with random number of
sensors. My logbook is a mess and nobody knows the reason.
Frankly speaking I think nobody with a shearwater petrel ccr
controller knowing in advance this bug  would use Subsurface as their
logbook. My profiles shows 2,1 bar of pO2 at 80 meters. Nothing you
would show to anybody.

Months ago, given your good relationship with Shearwater, I warmly
recommended to contact them privately asking info on this nasty
behaviour of some devices.

Bye

--
Davide
https://vimeo.com/bocio/videos