General
rain sensor
In principle, all rain sensors work according to the same principle: A container catches the water and a switch is triggered when a certain amount is reached.
But not the RAIN-CLIK sensor from Hunter, here the impulse is triggered as soon as it starts to rain. Thus, OpenSprinker responds much faster. Running watering is then immediately interrupted.
Connect Rain Sensor: Most rain sensors have two wires, simply connect when rain is detected. When there is no rain these are simply “open”, but some work the other way around and are “closed” when there is no rain and open with the rain.
You have to do this on OpenSprinkler just connect it to GND and SN1 and everything works. In the settings you should then have activated the rain sensor under “Weather and sensors”.
PS As of firmware version 2.1.9, the second sensor input is also activated and a rain sensor can then be connected there as well.
Hallo,
I've seen Hunter's Rain-Clik and Mini-Clik. Do you have a recommendation for Germany which one is more suitable?
Thank you!
Hallo,
yes, of course you can also use the Mini-Clik. Due to its construction, however, it reacts later to rain than the Rain-Clik.
It's probably cheaper to take the fixed Rain click and set the inertia in the software? How does the system then know that it has rained “enough”?
Very simple: It doesn't have to be at this moment! When the watering program starts again the next day, the rainfall amounts from the previous day are considered. If it was enough, then there is no (or only little) watering.
But the moment it starts to rain, you should turn off the irrigation.
Just a brief explanation: the rain sensor has only one function: it interrupts the running program. In the "Rain Delay" mode, it postpones all scheduled irrigations, in the "Zimmerman" and "Evapotranspiration" modes, the previous day's value is used.