I don’t have a POPP Z-Rain in use, but maybe the first and last single raindrops are recognized several times as “It starts to rain” or “It has stopped raining”.
Then the flow is triggered each time and you will receive several notifications.
Similar to a temperature sensor. Every change in temperature, e.g. above 26 °C, triggers the flow.
Possible solutions are to use a timer or set a variable.
It’s not sending alert about every drop but, instead, it has a little bin inside and ‘rain started’ alert should be send when the bin is filled and emptied for the first time.
Okay, I get it. I’m using the Netatmo rain sensor but I don’t have a “when it starts raining” trigger. I can only choose:
If “The precipitation has changed”.
So I can’t reconstruct your flow, sorry.
What I just remembered is that I also get 2 push messages when a special flow is triggered. I’m not sure, but I suspect that is since the iOS update to version 4.1.2.
Do you also use iOS or Andriod?