During the course of this chapter, we have looked into sensors that can be used to develop a security device with Intel Galileo. These sensors are motion (PIR) sensors, door/window sensors, water sensors, and gas/smoke sensors. We have developed a simple application with the MQ-9 gas sensor to detect carbon monoxide in the air. In order to get the value of the carbon monoxide level in the air, we used analog pins in Intel Galileo.

Then we proceeded to cover some home security devices such as remote door/window sensors, motion sensors, smoke detectors, water leak detectors, and door lock sensors. We added a new sensor, a flood detector, to our Smart Home application system to detect floods in the residential area.

In the next chapter, we will investigate how we can use cameras with Intel Galileo for home surveillance. Then we will extend our application to control the camera in order to increase the security use case by coordinating other security sensors.