Here is an example of controlling an irrigation depending on rain and temperature within a given time period:

Prerequisites:

1. It must not have rained in the last 24 hours.
2. The outdoor temperature must have been at least 24°C.
3. The release via the input "Lock active?" must be deactivated.

Procedure:

1. As soon as prerequisites 1, 2 and 3 are fulfilled, the irrigation starts directly and performs a pass through the three areas one after the other.
2. After the last area, the irrigation is stopped.
3. Irrigation can be restarted manually via the "Manual start" input as long as the outdoor temperature is above 24°C or it has not rained.
4. In addition, the cyclic transmitter automatically starts the irrigation every day at 4:15 am.
5. If it starts raining during watering or the outdoor temperature drops below 24°C, the watering in progress is stopped immediately and manual or cyclical watering is suspended.

To limit the frequency of watering, a threshold element for the temperature could be used to prevent multiple triggering within a short time. Alternatively, the outputs could be deactivated for a certain time to prevent them from being switched on again promptly.

Jannis Alexiou
BAB TECHNOLOGIE
(186; 2021;05)