1 did anyone try this? It looks promising (I like the concept of using a shortcut by waterdroppels…)
2 I don’t think if it would connect to homey via the Tuya cloud or zigbee app (it’s not listed), does zigbee standard support devices like this? Probably not?
It looks nice, but my experience with these types of bare-copper rain sensors is that eventually (often within a couple of months) they will corrode and stop working properly. Plus that a lot of cheap solar-based devices often use cheap epoxy that starts cracking due to thermal expansion/contraction which will lead to water ingress.
And no, Homey will not support this out of the box.
I bought this rain sensor recently. I works really well in the Smart Life app, but it’s not supported in Homey (yet). If you add it as Zigbee device, it shows up as unsupported and you can’t use its features. And the Tuya Cloud app does not recognize rain sensors, so that won’t work either. Such a shame…