In this project I will combine a cheap PIR motion sensor with a TC35 GSM module to build an alarm system which sends you an "INTRUDER ALERT" SMS whenever somebody tries to steal your stuff. Let's get started!

Step 1: Watch the Video !

This video gives you all basic information you need to get this build right. But I will give you some additional advice in the next steps.

Step 2: Order Your Parts !

Here is the parts list with example sellers:


1x Arduino Mini: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x FTDI breakout: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x Female headers: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x TC35 GMS module: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x PIR sensor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

2x Toggle switch: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x Step Up converter (5V-12V): http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x Siren: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x BUZ11: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

2x 10kΩ resistor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x 5mm green LED: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x 220Ω resistor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...


1x Arduino Mini: http://amzn.to/1OKHvGk

1x FTDI breakout: http://amzn.to/1JxIo3i

1x Female headers: http://amzn.to/1Hwgnui

1x TC35 GMS module: http://amzn.to/1OKI1nC

1x PIR sensor: http://amzn.to/1OKI5E1

2x Toggle switch: http://amzn.to/1OKI9DH

1x Step Up converter (5V-12V): http://amzn.to/1GlXmct

1x Siren: http://amzn.to/1K9cUSa

1x BUZ11: http://amzn.to/1zQkryY

2x 10kΩ resistor: http://amzn.to/1GlXB7e

1x 5mm green LED: http://amzn.to/1OKIsyp

1x 220Ω resistor: http://amzn.to/1OKIvKH


1x Arduino Mini: http://amzn.to/1HwhJ8d

1x FTDI breakout:http://amzn.to/1yX3CYp

1x Female headers:http://amzn.to/1IMwUZK

1x TC35 GMS module: http://amzn.to/1GlYJbc

1x PIR sensor: http://amzn.to/1GlYPPZ

2x Toggle switch:http://amzn.to/1GlYVHo

1x Step Up converter (5V-12V): http://amzn.to/1GlZ25z

1x Siren: http://amzn.to/1yX45tG

1x BUZ11: http://amzn.to/1HwifmH

2x 10kΩ resistor:http://amzn.to/1IMxsip

1x 5mm green LED: http://amzn.to/1HwinCA

1x 220Ω resistor: http://amzn.to/1IMxvdZ

Step 3: Build the System !

Here you can find the schematic which you should always follow during your hardware build ! If you do so then everything will work out.

Step 4: Upload the Code !

Here you can download the sketch for the arduino mini. Make sure to download the timer library before trying to upload the code.

Timer library: https://github.com/JChristensen/Timer

Step 5: Success !

You did it ! Now you can enjoy more safety with your new alarm system.

Feel free to check out my Youtube channel for more awesome projects:


You can also follow me on Facebook, Twitter and Google+ for news about upcoming projects and behind the scenes information:



<p>Is it possible if I add a jpeg camera and capture an image and save it to sd card module or instead of message alert a jpeg picture will be send? </p>
<p>Hi,</p><p>Maybe a bit late, but I was wondering if it is also possible for the system to work without the SMS part. <u>So in other words just have an alarm without the GSM module?</u></p>
<p>Of course it would. If you want the &quot;smarts&quot; i.e. the delay, you can keep the arduino, but you can make it work just with a transistor and a relay on the output of the PIR module</p>
good job mr
<p>nice can you pls one help to me</p>
<p>Fow such purposes I use cheap mobile phone with fast dial function. For example, lasting press (above one sec) to button 1 will cause voice mail call. You only need to solder two wires to button contacts and set up your number such as voice mail</p>
<p>coding mr</p>
<p>hello, I javasichiro of Indonesia<br> I want to consult, for FTDI component, Pro Mini whether it can be replaced with the Arduino Uno / Arduino Nano (though brief) and GMS TC35 module for me to replace it with a GSM module Mini Sim900a V4.0?</p>
<p>And should be able to disarm it too, remotely with mobile phone perhaps</p>
<p>Nice build! U could use reed switch at door too.<br><br>Dat spider at 6:27 :p</p>
<p>How do you activate the GSM with the cell carrier? We use M2M modems (verizon) at work but no one knows how to activate them, they want to use a hotspot plan at 60.00 a month.</p>
just an idea: instead of spending the money on a gsm module you could use a RPI/Ethernet shield and instead of sending a SMS, send a email. then using ifttt you could automatically send the text.
<p>What about the case, where can I get that?</p>
Go to a hardware store and ask for an ip66 junction box with rubber grommets
<p>Good plan :-)</p>
<p>Maybe a stupid question, but what are the two potentiometers for in the top of the box for? (they don't appear in the schematic) And why use a waterproof enclosure with non-waterproof switches and pots - cost?</p>
<p>The potentiometers control the delay time and distance of the PIR sensor. </p>
<p>Hi, Nicely done project. One question: I'm in the US, can you please tell me the manufacturer and model of the &quot;project box&quot; you have used? It looks like a nice box to use for other projects.Thanks!</p>
<p>I don't know the manufacturer. Just visit your next hardware store. They will surely have something like this.</p>
<p>According to comments on Amazon the GSM module in this project is not compatible with American cell phone networks. Does anyone know about this?</p>
<p>I really like this build. Could you go into more detail about how the GSM module connects to the mobile network? How does it do this? Is there no configuration required?</p>
<p>This might help: https://youtu.be/gVGD-f8SQSI</p>
<p>Yes, thank you. And the voice is familiar! ;)</p>
<p>Is it possible to expand the system and make use of several inputs? Then you can have SMS telling you in what room you have an intruder, or if you have a waterleak, If you operate it on batt.power you can also get an SMS if you have powerloss in you house. I`m getting all kinds of ideas here. I have to stop... :-) Very nice project!!</p>
This is very nice. I love it.

About This Instructable




Bio: Awesome Electronics Tutorials, Projects and How To´s
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