I have a very default Zimmerman configuration.
Temp 20C (100%) , Rain 0mm (100%) , Humidity 30% (100%)
The current diagnostics looks about correct:
Mean Temp 17.9 C
Percip Today 13mm
Indeed we are currently very much in a torrential downpour and 13mm sounds about correct.
Putting 13mm into https://github.com/rszimm/sprinklers_pi/wiki/Weather-adjustments
13mm is 1/2 inch so we should be at 0% watering ratio now. 50 * 1/100 * -2% = -100%
From a practical point of view we are flooding so 0% sounds entirely correct.
However the watering ratio is currently 65 %.
Firmware version: 2.1.8 (3)
App version 2.0.1
Hardware version 3.0 – AC
Attached diagnostic screen shot.
I tried a reboot to see if it made any difference.