Fig. 3 shows the construction details of the Arduino board, which consists of two main boards; the Arduino Mega board and the SD card shield board. The Arduino Mega board contains the ATMega2560 microcontroller as shown in this figure. However, in order to connect the SD card to the Arduino Mega board, a plug and play module called SD card shield module is used to ease the connection between the SD card and the Arduino Mega board. Moreover, this shield contains an Ethernet module with RJ45 connector to provide the Arduino board with the ability to connect it to the Local Area Network (LAN) or even the internet to monitor the system remotely by using the a web browser. However, this feature is not used in the current work and can be utilized in the system if required in a future work.