Evapotranspiration Sum for the Day (dayET, ET24)

[Karen K]

The observation type "ET" is calculated by WeeWX as the evapotranspiration rate multiplied by the archive interval. The value is always very small, and the skins round it to 0.0.

Regarding rain, two additional observation types besides "rain" are available: "dayRain" and "rain24". Unless they are some kind of aggregation they are provided as scalar values.

Evapotranspiration is the opposite of rain in some way, but there are no observation types like "dayRain" and "rain24" for "ET" in standard WeeWX.

So I added "dayET" and "ET24" to the XType extension weewx-GTS in the hope it will be useful. Users can show "dayET" together with "dayRain" and "ET24" together with "rain24".