Any security surveillance system is incomplete without the digital eyes of a camera. With the use of a camera, we can keep a real-time watch at our place or premises even when we are not present. If any trespasser enters our premises, then with a combination of sensors and camera, we can make a video recording or take pictures, which can help to track down the trespasser later on.

In our use case, we will use the Raspberry Pi camera module, which is an add-on accessory provided by the Raspberry Pi foundation itself, as shown in Figure 6.14:

This camera module can be easily interfaced with the Raspberry Pi's dedicated CSI camera port. This camera has a ribbon cable that attaches the camera to Pi. Refer to the official video by the Raspberry Pi foundation to install the camera on the Pi correctly. The following is the video link: https://www.raspberrypi.org/documentation/usage/camera/README.md.

We have learned about each and every component required to build the security surveillance system except the Raspberry Pi itself, which is the heart of the system. But we will not go into the details, as we have been using it throughout the book. However, if you think you need to brush up your knowledge, I suggest you to go through Chapter 2, Know Your Raspberry Pi, and then come back and continue from here.