By Matthew Poole
About This Book
- This ebook publications you thru development a whole domestic safety procedure with Raspberry Pi and is helping you remotely entry it from a cellular gadget over the Internet
- It covers the basics of interfacing sensors and cameras with the Raspberry Pi that you can attach it to the skin world
- It follows a modular strategy so you might decide on the modules and contours you will have on your personalized domestic defense system
Who This ebook Is For
This publication is for an individual who's drawn to development a modular domestic protection procedure from scratch utilizing a Raspberry Pi board, uncomplicated electronics, sensors, and easy scripts. This publication is perfect for enthusiastic beginner programmers, electronics hobbyists, and engineering pros. it might be nice when you've got a few uncomplicated soldering talents so one can construct many of the interface modules.
What you'll Learn
- comprehend the thoughts at the back of alarm structures and intrusion detection devices
- attach sensors and units to the on-board electronic GPIO ports safely
- video display and keep an eye on attached units simply utilizing Bash shell scripting
- construct an I/O port expander utilizing the I2C bus and attach sensors and anti-tamper circuits
- seize and shop photos utilizing movement detectors and cameras
- entry and deal with your method remotely out of your cellular phone
- obtain intrusion indicators and pictures via your e-mail
- construct a worldly multi-zone alarm system
The Raspberry Pi is a strong inexpensive credit-card-sized machine, which lends itself completely because the controller for a complicated domestic safety approach. utilizing the on-board interfaces on hand, the Raspberry Pi could be accelerated to permit the relationship of an almost countless variety of defense sensors and units. The Raspberry Pi has the processing energy and interfaces to be had to construct a worldly domestic safety approach yet at a fragment of the price of commercially on hand systems.
Building a house safety process with Raspberry Pi begins via displaying you the Raspberry Pi and the way to establish the Linux-based working procedure. It then courses you thru connecting change sensors and LEDs to the local GPIO connector properly, and the way to entry them utilizing easy Bash scripts. As you dive extra in, you'll 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 defense setup.
In the later chapters of the e-book, we'll examine extra subtle themes equivalent to including cameras, remotely gaining access to the procedure utilizing your cell phone, receiving intrusion signals and pictures by means of email, and more.
By the tip of the booklet, you'll be well-versed with using Raspberry Pi to strength a home-based safeguard approach that sends message signals every time it's prompted and may be ready to construct a very refined and modular domestic safety method. additionally, you will achieve an exceptional realizing of Raspberry Pi's surroundings and be capable to write the features required for a safety system.
Style and approach
This easy-to-follow advisor contains a chain of initiatives, the place each bankruptcy introduces a brand new notion and on the finish of the booklet, these kind of innovations are introduced jointly to create a whole domestic protection method. This publication good points transparent diagrams and code
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Additional info for Building a Home Security System with Raspberry Pi
Well, actually in many cases, this is not strictly true. This is because of the addressing scheme for I2C devices, which makes all devices identifiable when they are all connected to the same two wires (their unique address). The address of each device is agreed upon in advance by manufacturers to make sure that everyone's devices will work together on the same bus without creating conflicts. As such, the address is pre-programmed into the device. [ 43 ] Extending Your Pi to Connect More Things The MCP23017 has been given its unique base address, but can be modified by changing the address pins A0-A2 high or low; thus, in effect, it can be configured to be one of 8 addresses.
Data is transmitted on the MOSI (master-out-slave-in) and MISO (master-in-slave-out) (pins 19 and 21 respectively). The UART serial bus The Universal Asynchronous Receiver and Transmitter (UART) bus is a way to communicate with external devices over a serial data connection, and is a common way for the Raspberry Pi to access data from devices such as GPS modules, which often come with serial connections. It can be a little bit fiddly getting the Pi set up to communicate with UART-connected devices, as it's also tied in with the operating system's serial console.
I'll show you how to build one later in this book. 3V levels. Connecting voltages higher than this to the pins could irreversibly damage your Pi. If you follow the instructions in this book, then everything should be fine, but randomly connecting things to your Pi that use lots of power will break it! [ 23 ] Connecting Things to Your Pi with GPIO Getting acquainted with the GPIO Before we embark on connecting lots of things to our Pi board, it might be a good idea to just get acquainted with the GPIO through a couple of simple projects that will help us understand how to interact with the digital I/O pins using shell scripts.