For this tutorial, we will be creating a motion detector that can be monitored from anywhere in the world using Wia (https://www.wia.io). Wia is a cloud platform that enables makers to bring their ideas to life without having to worry about building a real-time infrastructure, managing servers or designing databases.

You will need a Wia account to do this tutorial. You can create one here https://www.wia.io/signup

Step 1: Parts

Here's a list of the required parts and where you can find them on Amazon (UK).

Step 2: Setup Your Raspberry Pi

Go to https://www.raspberrypi.org/downloads/raspbian/ to download the latest version of Raspbian. Here's the installation guide on how to prep your MicroSD card and install an image https://www.raspberrypi.org/documentation/installa...

Now we will connect the PIR to your Raspberry Pi.

  • Connect VCC to GPIO port 2.
  • Connect GND to GPIO port 6.
  • Connect OUT to GPIO port 12.

See the diagram above showing the different ports.

Now connect the Ethernet cable and power supply to your Raspberry Pi.

Step 3: Install Node.js on Your Raspberry Pi

The instructions for this are copied from here http://blog.wia.io/installing-node-js-v4-0-0-on-a-...

Download Node.js source
Raspberry Pi Model A, B, B+ and Compute Module

wget https://nodejs.org/dist/v4.0.0/node-v4.0.0-linux-armv6l.tar.gz
tar -xvf node-v4.0.0-linux-armv6l.tar.gz
cd node-v4.0.0-linux-armv6l

Raspberry Pi 2 Model B

wget https://nodejs.org/dist/v4.0.0/node-v4.0.0-linux-armv7l.tar.gz
tar -xvf node-v4.0.0-linux-armv7l.tar.gz
cd node-v4.0.0-linux-armv7l

Copy to /usr/local

sudo cp -R * /usr/local/

Step 4: Connect to Wia and Publish an Event

Create a device in the Wia dashboard (https://dashboard.wia.io). Make a note of the device token. You can find it in the device's settings.

Create your project

cd ~
mkdir wia-motion-detector
npm init

Note: Just press 'y' to everything in npm init.

Add packages

npm install --save wia
npm install --save onoff

Create a Device client

touch index.js
nano index.js
var wia = require('wia')('token');

Watch PIR for motion

var Gpio = require('onoff').Gpio,
	pir = new Gpio(18, 'in');   

pir.watch(function (err, value) {
	if (err) {     throw err;   }     
	wia.events.publish({name: "motionDetected"});


node index.js

To check your events, go to the Events tab for your device.

<p>We'll be pushing out an updated version of this next week along with our iOS app. Find out more at https://www.wia.io</p>
<p>Hey, this looks cool! Thanks for sharing this here. Welcome to instructables!</p>
<p>Thanks Seamster! If you have any questions ask here or drop us an email at team@wia.io </p>

About This Instructable




Bio: Founder at Wia.
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