On Tue, Jan 01, 2019 at 12:03:31PM -0500, Greg Troxel wrote:
> Artturi Alm <artturi....@gmail.com> writes:
>
> > my sensor does fill ->value_cur with mPa, so pressure does fit into the
> > "everything else"-else{} with ->cur_value / 1000000.0 for printout in kPa.
>
> Until very recently I had never seen pressure in kPa. For atmospheric
> pressure, the standard unit seems to be hPa. I realize that's a
> less-normal SI prefix, but it happens to match mbar. But, I am seeing
> kPa more tha last 6 months.
>
> So, I wonder why you are choosing kPa vs hPa, and if that choice ends
> up being a framework choice for everything. And how the rest of the
> world deals with this issue.
>
By accident, i guess, and after having read about pascals on wiki[0],
it felt like a good choice, for being "not just for meteorologists",
nor imperial, but i'm from metric .eu, fwiw..
I actually got *= 1000 for mPa in the driver, so i don't really care
about the unit to be used, as long as it's not loosing any precision/
limiting range (for kernel -> user, so Pa would work just as well, and
i'm not sure whether mPa does buy anything w/r.t. future sensors, it
was more about minimal diff looking reasonable).
-Artturi
[0] https://en.wikipedia.org/wiki/Pascal_(unit)
