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We have started with the setting up of Raspberry Pi 3 Model B+, which operates at 1.4GHz. This is supported by Bluetooth 4.2.1, along with wireless ac Wi-Fi. The process begins with connecting the microphone and speaker to the Raspberry Pi and then by inserting the SD card into it. Thereafter, USB keyboard, mouse, and HDMI monitor are added sequentially.

Figure 4.7 Implementation of PIR sensor in our system.

Figure 4.8 Block diagram of the control unit.

Figure 4.9 Live streaming results of the LDR sensor.

At last, Ethernet cable is connected to Wi-Fi network. After successful configuration, date and time will be set.

The next important hardware part is the Pyroelectric Infrared (PIR) Sensor Module, required for human body detection. Its implementation into the interface circuit is shown in Figure 4.7.

In the next phase, control unit is designed. Microcontroller is connected with relay module and LDR, where proper power supply is required. Block diagram is given in Figure 4.8.