deco code rewrite

[Jan Schubert]

On 12/07/12 17:51, Dirk Hohndel wrote:
> Jef Driesen <jefdriesen at telenet.be> writes:
>>>>> - Battery voltages (nice to have)
>>>> I've always wondered why anyone would need this? I mean as long as 
>>>> you have
>>>> enough, everything is fine, and if you don't then probably no dive 
>>>> will be recorded.
>>> It's nice to download your dives and get the nice warning that your
>>> battery is low in the dive log program. Believe it or not, that's
>>> something that I intended to implement for Uemis (especially for the
>>> tank sensor battery) as it's so easy to do and so helpful to have.
>> Of course it's important to know the battery status. However I see this 
>> as something that's important while operating the device, and not 
>> something that goes into your logbook. I mean it's very important that 
>> the device shows you the battery status, so you can decide whether to 
>> charge it or not. But what's the added value of having this info for 
>> each dive? My point is that I consider the battery status more a 
>> property of the device.
>>
>> Showing some kind of low battery warning during (or after) the download 
>> is something different then what Jan meant with adding support for 
>> battery voltages. I think (and correct me if I'm wrong), that Jan 
>> referred to supporting the battery status in the header or even the full 
>> battery profile in the samples (the predator has this).
> I think what would be nice is to have a way for libdivecomputer to
> report to the application "at the end of the dive the dive computer
> reported that its batteries / the tank sensor batteries are low and need
> to be charged or replaced". So this wouldn't be sample information (good
> for Shearwater to support that) but simply dive level header
> information.

Didn't get Jef's mail so answering to this one.

In general: For CCR divers it is quite important to rely on good
batteries as someones life may rely on this!

Jef is right, the Shearwater logs the battery voltage during a dive and
the newest Shearwater Desktop software also shows a new nice graph for
this (see attachment, sry for the high res) where before it just showed
the voltage at the begin and the end of a dive (see header in attachment).

>From my point of view I also like to see any information which is
reportet by the dive computer. Seeing Battery Voltage afterwards is not
that important but as you can see in this example it fluctuated quite
much in this dive where it has been very stable before all the others
dives. In fact this battergot replaced right after as I also got a
warning in my computer itself.

In the Shearwater itself I can check current voltages (any time, also
while diving), no way to see how it behaved during a dive afterwards, so
having this is quite nice and allows one some prediction about the
oncoming lifetime of his batteries.

Thx,
Jan
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