To calculate ET you need:

   - Outside temperature
   - Humidity
   - wind
   - solar radiation

Do you have everything? If any one of them is missing, you'll get a N/A.



On Fri, Apr 28, 2023 at 10:58 AM DR <wxe...@gmail.com> wrote:

> Perhaps I assumed too much, but my Rainwise IP-100 interface to the
> Rainwise station does not generate ET in hardware.
>
> I found where the hardware, software, or hardware preferred choices are in
> the configuration, and changed 'hardware preferred' to "software".
>
> In my Seasons.skin running WeeWx 4.5.1 for now.  After running for more
> than 24 hours, still get ET  N/A on that line.
>
> Maybe I can't get ET for this station.  It isn't too important, I'm not a
> professional farmer and just like watching that number when it is available.
>
> Is there more to enabling that value beyond just changing the source
> preference line?  Dale
>
> The configuration I was referencing was:
>
> [StdWXCalculate]
>     [[Calculations]]
>         pressure = prefer_hardware
>         altimeter = prefer_hardware
>         appTemp = prefer_hardware
>         barometer = prefer_hardware
>         cloudbase = prefer_hardware
>         dewpoint = prefer_hardware
>         ET = prefer_hardware
>         heatindex = prefer_hardware
>         humidex = prefer_hardware
>         inDewpoint = prefer_hardware
>         maxSolarRad = prefer_hardware
>         rainRate = prefer_hardware
>         windchill = prefer_hardware
>         windrun = prefer_hardware
>
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