I have read on these message boards that the new Gen 3 support WU stations out of the box, it was also mentioned that these were back end changes which suggest that its possible to get this on gen 2 devices.
When would this functionality be coming to gen 2 devices?
Native WU support in G2 controllers its only supported in a special version sold by Costco. G3 controllers has native support for WU, It is part of the meteorological intelligence feature…
Definitely research this subject some more before you buy a PWS.
Rachio uses the Aeris weather service for Gen1/Gen2 (non-Costco) units.
Most PWS don’t have the ability to directly send their weather data to the Aeris service. To get past that, some folks use a separate piece of hardware (Meteobridge) that will post the data over to Aeris (via PWSWeather) for them, and others use the very cool WUFYI service that @Gene wrote/provides.