So happy with how this works. 

Everything works nicely but I noticed a weird issue: I was waiting to fine tune the dripping installation and when the app said Next watering in 1 minute, it was not. Kept saying 2 minutes, then 3, then 5... 

Finally it started some 20 minutes later than scheduled. And the zones were not matching with the real order. In my app it's zone 1, then 2, etc and the app was saying now watering zone 3, next 7, next 2 but surprisingly, the zones were being watered correctly.

Apart from that, it's working great. Thanks.