*3.3.2.2 Arduino UNP R3, relay module and soil moisture sensor installation*

The second stage is the Arduino UNP R3, relay module and soil moisture sensor installation. At this stage, the Arduino UNP connects to the relay using a jump wire. Soil moisture sensors are installed to detect soil moisture.

#### *3.3.2.3 PVC tubing installation*

The installation of PVC tubing is safe transportation of rainwater.
