On 22-01-17 17:10, Dirk Hohndel wrote:
On Jan 22, 2017, at 2:32 AM, Anton Lundin <[email protected]> wrote:
Shearwater we have great relationships with (ok, they still owe me a
response on more details of the new BTLE communication, but hey, they
already sent me a Perdix AI). We used to have a contact at Mares, but he
left. Do they still produce new dive computers?
I would love to get some feedback from them about their calibration
values of their O2 sensors. I've reverse-engineered a patch which
produces what looks to be the right values, but it would be great if
someone with internal knowledge about how its thought could comment on my
analysis.
( The short and curly: Shearwater stores their voted/computed/averaged
ppO2, and the mV from the actual sensors in each sample. They also store
a "calibration value" in the dive header of unknown unit. If I take that
* about 1000 (1024?) the average of the sensors will produce the same
ppO2 as they have stored in my sample data. Is that bogus math or is it
the right<tm> way? )
Can you write this up with a bit more context and maybe the pertinent code
sample and send it to me? I'll be happy to poke them about this.
After the discussions with Anton I tried to ask Shearwater about this (and a few
other things as well). But unfortunately my contact person no longer works at
Shearwater and I had no success in getting in touch with someone else there. A
bit bizarre, because they were very responsive before. Anyway I'll forward you
the emails with our technical questions.
Jef
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