Home surveillance: magnetic door protection with Text-To-Speech #piday #raspberrypi @Raspberry_Pi

Thanks to Cédric for sending in this great project! Check out the full tutorial on his site here.

One of the “issues” we have at home is that we want to know when a specific door has been opened. We all know the door bell we’ve been using in shops for ages. When a customer enters the shop a bell will ring and the shop owner gets notified that someone entered; the bell was traditionally placed above the entrance door. This is basically the behaviour we want, but nowadays we have more advanced technologies to notify someone: we could trigger a wireless alarm, send a notification (mail/Growl/PubNub) to our smartphone, etc.

Unfortunately that’s not the only reason why we want to have such kind of technology. Nowadays, burglary has become a habit in our lifes and a lot of people started investing in home security; but ofcourse not everybody is capable to invest, due to the high costs.

You will find a myriad of information on the internet about home surveillance, and a lot of different brands which are offering surveillance hardware. In most cases, a company would offer a control station, which you can expand with additional features, for example: a security cam, door/window magnets, heating sensors, etc. The control station will manage and control all the different devices. As mentioned above a lot of these features are expensive, you will be paying a lot of money for a single feature; for example if you want to expand the control station with an extra door magnet, you will be paying 50€ and more.

Therefore people can “Do It Yourself” with equipment that’s less expensive, and with some time and effort. One could consider to buy a low-budget microcontroller, for example the very popular and open source Raspberry Pi, and a set of door magnets.

What is this tutorial about?

In this tutorial we will build a simple security system using two Raspberry Pi’s and a set of door magnets. The idea is that one Raspberry Pi will be controlling the magnet and will send a message to the second Raspberry Pi which in its turn will trigger an alarm when it received the message. So let’s get started!

What do we need?

To get started we will need 2 working Raspberry Pi’s with SD card and 5V charger. You’ve installed Arch Linux on the SD cards and have a networking connection (LAN or WLAN). We also need a set of magnets; in this tutorial I’ve been using the magnetic door sensors from adafruit. At last we need an audio device so that we can play sound (alarm/Text To Speech); I have been using this one from the Pi Hut. The audio device is not required, as you can send a Growl message instead; in this case you will need only one Raspberry Pi.

For this tutorial we will be using the Arch Linux operating system, so to get started get a fresh installation of Arch Linux on your two SD cards. Make sure you have a connection with your internal network, and both Raspberry Pi’s can communicate with eachother; try to ping.

Read more.


Featured Adafruit Product!


Magnetic contact switch (door sensor): This sensor is essentially a reed switch, encased in an ABS plastic shell. Normally the reed is ‘open’ (no connection between the two wires). The other half is a magnet. When the magnet is less than 13mm (0.5″) away, the reed switch closes. They’re often used to detect when a door or drawer is open, which is why they have mounting tabs and screws. You can also pick up some double-sided foam tape from a hardware store to mount these, that works well without needing screws. Read more.

998Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!

Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards

Join Adafruit on Mastodon

Adafruit is on Mastodon, join in! adafruit.com/mastodon

Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Join over 36,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org

Maker Business — “Packaging” chips in the US

Wearables — Enclosures help fight body humidity in costumes

Electronics — Transformers: More than meets the eye!

Python for Microcontrollers — Python on Microcontrollers Newsletter: Silicon Labs introduces CircuitPython support, and more! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi

Adafruit IoT Monthly — Guardian Robot, Weather-wise Umbrella Stand, and more!

Microsoft MakeCode — MakeCode Thank You!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — #NewProds 7/19/23 Feat. Adafruit Matrix Portal S3 CircuitPython Powered Internet Display!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !

No Comments

No comments yet.

Sorry, the comment form is closed at this time.