*3.3.2.1 Main installation process*

The first installation is applying the mini water pump. The function of the water pump is assisted to disperse the water from tank storage to the soil through PVC tubing (**Figures 1**–**3**).

**Figure 1.** *Installation of mini water pump.*

**Figure 2.** *Arduino UNP R3, relay module and soil moisture sensor.*

*Smart Rainwater Harvesting System for Sustainable Agricultural Irrigation and Drainage System DOI: http://dx.doi.org/10.5772/intechopen.104442*

**Figure 3.** *Installation of PVC tubing.*
