By Matthew Poole
About This Book
- This ebook publications you thru development an entire domestic safety process with Raspberry Pi and is helping you remotely entry it from a cellular equipment over the Internet
- It covers the basics of interfacing sensors and cameras with the Raspberry Pi for you to attach it to the skin world
- It follows a modular technique that you should decide upon the modules and lines you will want to your personalized domestic defense system
Who This booklet Is For
This e-book is for an individual who's drawn to construction a modular domestic safety method from scratch utilizing a Raspberry Pi board, simple electronics, sensors, and easy scripts. This ebook is perfect for enthusiastic beginner programmers, electronics hobbyists, and engineering execs. it'd be nice when you've got a few simple soldering abilities so one can construct the various interface modules.
What you'll Learn
- comprehend the thoughts in the back of alarm structures and intrusion detection devices
- attach sensors and units to the on-board electronic GPIO ports safely
- display screen and keep watch over hooked up units simply utilizing Bash shell scripting
- construct an I/O port expander utilizing the I2C bus and attach sensors and anti-tamper circuits
- catch and shop pictures utilizing movement detectors and cameras
- entry and deal with your procedure remotely out of your cellular phone
- obtain intrusion indicators and pictures via your e-mail
- construct a cosmopolitan multi-zone alarm system
The Raspberry Pi is a strong reasonably cheap credit-card-sized computing device, which lends itself completely because the controller for a classy domestic defense process. utilizing the on-board interfaces to be had, the Raspberry Pi should be elevated to permit the relationship of a nearly endless variety of defense sensors and units. The Raspberry Pi has the processing strength and interfaces on hand to construct a worldly domestic protection procedure yet at a fragment of the price of commercially on hand systems.
Building a house protection method with Raspberry Pi starts by way of exhibiting you the Raspberry Pi and the way to establish the Linux-based working approach. It then courses you thru connecting change sensors and LEDs to the local GPIO connector accurately, and the way to entry them utilizing uncomplicated Bash scripts. As you dive extra in, you'll the right way to construct an input/output growth board utilizing the I2C interface and tool provide, permitting the relationship of the big variety of sensors wanted for a regular domestic safeguard setup.
In the later chapters of the booklet, we'll examine extra refined subject matters corresponding to including cameras, remotely getting access to the method utilizing your cellphone, receiving intrusion indicators and photographs via email, and more.
By the tip of the booklet, you'll be well-versed with using Raspberry Pi to energy a home-based defense process that sends message indicators at any time when it's brought on and should manage to construct a really subtle and modular domestic safety procedure. additionally, you will achieve an exceptional knowing of Raspberry Pi's surroundings and be ready to write the features required for a safety system.
Style and approach
This easy-to-follow advisor contains a sequence of initiatives, the place each bankruptcy introduces a brand new thought and on the finish of the publication, these types of recommendations are introduced jointly to create a whole domestic protection procedure. This publication beneficial properties transparent diagrams and code
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Additional resources for Building a Home Security System with Raspberry Pi
This means that its default state, when the switch isn't pushed, is high. [ 29 ] Connecting Things to Your Pi with GPIO When the switch is pushed, the value should be read as 0 or low. If you have more than two hands, you can try this by pushing the button and re-running the command. Or, we can just create a script to poll the switch state. /bin/bash sudo echo 27 > /sys/class/gpio/export sudo echo in > /sys/class/gpio/gpio27/direction # loop forever while true do # read the switch state SWITCH=$(sudo cat /sys/class/gpio/gpio27/value) if [ $SWITCH == 1 ]; then #switch not pushed so wait for a second sleep 1 else #switch was pushed echo "You've pushed my button" fi done When you run the script and then push the button, you should see You've pushed my button scrolling up the console screen until you stop pressing it.
The filesystem will be enlarged upon the next reboot Click on OK. Select Finish on the config screen and reboot your Pi when prompted. After your Pi reboots with its fuller file system, you'll be taken straight to the shell prompt where you can log in with the default user and password. Login: pi Password: raspberry [ 11 ] Setting Up Your Raspberry Pi Setting up your Pi When you boot into the shell and have the Ethernet connected, hopefully the Pi will have connected to your home network and acquired an IP address from your router.
In particular, we've safely and properly connected a switch to a digital input pin, which will form the foundation for our home security detection circuits. In the next chapter, we'll look at ways to expand the number of things we can connect to our Raspberry Pi, overcoming the limitation of having just the 8 digital pins available to us on the GPIO by tapping into other interfaces on the GPIO and building our own input/output expansion board. [ 33 ] Extending Your Pi to Connect More Things We're now going to look at ways to expand the number of things we can connect to our Raspberry Pi, overcoming the limitation of having just the 8 digital pins available.