**4. Results and discussion**

#### **4.1 Introduction**

This chapter will outline the project's design and construction process. To complete the project, all equipment structures in this project must be evaluated, and all specifications must be fully implemented.

#### **4.2 General concept**

The Arduino microcontroller will be used for the main system in this project. Arduino has been chosen because it has several suitable hardware modules for Arduino boards themselves [4, 5]. There are several Arduino hardware components that can be attached to the Arduino plate, such as micro/mini water pump, soil moisture sensor, and power sources. The equipment and components used in the rainwater harvesting system are:

#### *4.2.1 Soil moisture sensor*

The Soil Moisture Sensor is used as the key component to achieve the objective in this analysis. The role of the sensor is to use the capacity to measure soil water


#### **Table 3.**

*Moisture sensor module specification.*

**Figure 4.** *The moisture sensor.*
