Garden Watering Automation

I have fully automated the Garden watering.

Physical architecture: 3x Hunter Water Ventiles wired to 24V Relais wired to Rasperry PI.

I am collecting hourly weather data (Soil moisture + Precipitation quantity) via ftp-download from Deutschen Wetterdienst (DWD). The actual temperature collected from a Outside temperature sensor of my Vailant heating unit.

Based on Soil moisture + Precipitation quantity + temperature, I do the Garden Watering with FHEM.