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Raspberry Pi: Amazing Projects from Scratch by Richard Grimmett, Matthew Poole, Arush Kakkar, Ashwin Pajankar

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Chapter 9. Putting It All Together

Over the past eight chapters, we've explored the elements and concepts of a full-featured home security system that you'd expect to have installed in your property. It's been presented in a modular fashion so that you can choose which features you want for your system, to allow you to make it as compact and basic or large and complex as you require.

Fundamentally, the idea behind a home security system is to detect whether particular zone inputs are triggered high or low by an external sensor, be that a switch, motion detector, or water detector. At the end of the day, as far as the control software is concerned, the type of sensor is irrelevant and the system software's job is to simply check the state of its ...

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