By Matthew Poole
About This Book
- This ebook publications you thru development an entire domestic safeguard method with Raspberry Pi and is helping you remotely entry it from a cellular machine over the Internet
- It covers the basics of interfacing sensors and cameras with the Raspberry Pi that you should attach it to the skin world
- It follows a modular method that you can decide upon the modules and lines you will have on your custom-made domestic safeguard system
Who This e-book Is For
This ebook is for someone who's drawn to construction a modular domestic safety method from scratch utilizing a Raspberry Pi board, simple electronics, sensors, and easy scripts. This publication is perfect for enthusiastic amateur programmers, electronics hobbyists, and engineering pros. it might be nice in case you have a few uncomplicated soldering talents so one can construct a number of the interface modules.
What you'll Learn
- comprehend the thoughts in the back of alarm platforms and intrusion detection devices
- attach sensors and units to the on-board electronic GPIO ports safely
- visual display unit and keep an eye on attached units simply utilizing Bash shell scripting
- construct an I/O port expander utilizing the I2C bus and fasten sensors and anti-tamper circuits
- catch and shop photos utilizing movement detectors and cameras
- entry and deal with your approach remotely out of your cellular phone
- obtain intrusion indicators and photographs via your e-mail
- construct a worldly multi-zone alarm system
The Raspberry Pi is a robust reasonably cheap credit-card-sized laptop, which lends itself completely because the controller for a complicated domestic defense procedure. utilizing the on-board interfaces to be had, the Raspberry Pi might be accelerated to permit the relationship of a nearly limitless variety of protection sensors and units. The Raspberry Pi has the processing strength and interfaces on hand to construct a worldly domestic safeguard approach yet at a fragment of the price of commercially on hand systems.
Building a house safety approach with Raspberry Pi begins by means of exhibiting you the Raspberry Pi and the way to establish the Linux-based working procedure. It then courses you thru connecting swap sensors and LEDs to the local GPIO connector thoroughly, and the way to entry them utilizing basic Bash scripts. As you dive additional in, you'll how to construct an input/output growth board utilizing the I2C interface and tool offer, permitting the relationship of the big variety of sensors wanted for a standard domestic safeguard setup.
In the later chapters of the ebook, we'll examine extra subtle subject matters corresponding to including cameras, remotely gaining access to the process utilizing your cellphone, receiving intrusion indicators and pictures by way of email, and more.
By the tip of the publication, you'll be well-versed with using Raspberry Pi to energy a home-based safety method that sends message signals at any time when it truly is brought on and should have the capacity to construct a really subtle and modular domestic safety procedure. additionally, you will achieve an excellent figuring out of Raspberry Pi's atmosphere and have the capacity to write the capabilities required for a safety system.
Style and approach
This easy-to-follow advisor contains a sequence of tasks, the place each bankruptcy introduces a brand new suggestion and on the finish of the publication, a majority of these ideas are introduced jointly to create a complete domestic safeguard procedure. This e-book good points transparent diagrams and code
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Additional info for Building a Home Security System with Raspberry Pi
You'd have noticed that we've been putting sudo at the start of each command that we run in the terminal window. This is so that commands are run as the root user—the highest security level. This elevated security is required to perform many operations. sudo actually means super do. If you can't be bothered to type sudo every time, then you can switch to the super user by typing the following: $ sudo su You'll see that the prompt changed from a $ to a #, which indicates that you are now running as the root user.
40 ] Chapter 3 The MCP23017 is an integrated circuit that connects directly to the I2C bus (the SDA and SCL pins we talked about earlier) and gives us 16 bi-directional input and output pins. If required, we can connect up to 8 of these chips to the same bus, giving us up to 128 inputs and outputs (yes, I know that I said "virtually unlimited" previously, but I'll explain later). com/MCP23017. The I2C port expander circuit The basic parts you will need to build your port expander are as follows: • A 1 x MCP23017 16-bit port expander IC • A 4 x 10K-ohm resistor • A 1 x 100nF, 16V ceramic capacitor • A copper strip board (or Veroboard®) • A hook-up wire [ 41 ] Extending Your Pi to Connect More Things Here's the circuit diagram for our I2C port expander circuit.
The +5V connection (pins 2 and 4) is essentially the +5V input from the external power supply connected to the micro-USB power port. This can be used to power small external circuits if necessary, although it is recommended that an additional external +5V supply be used if significant current is required. 3V regulator and provides a small amount of current up to 50mA. If you need to draw more than 50mA for your external circuits, then you should use an external power supply. I'll show you how to build one later in this book.