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<!DOCTYPE HTML>
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<title>Forward BLE sensor data to Initial State | diyActive</title>
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<meta name="description" content="Use the reelyActive platform to listen for sensor data from third-party Bluetooth beacons and forward the real-time stream to Initial State.">
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<h1>
Forward BLE sensor data to Initial State <br>
<small> Collect and visualise the data from any sensor beacon with ease </small>
</h1>
<p> <a href="https://initialstate.com/" target="_blank">Initial State</a> is a web platform which lets you <i>stream data from your devices and applications to beautiful visualizations in your web browser</i>. In this tutorial we'll show how to use the reelyActive platform to listen for sensor data from third-party Bluetooth beacons and forward the real-time stream to Initial State. </p>
<img src="images/sensorbeacon-initialstate.jpg"
class="img-responsive center-block">
<h2> <del>Hears</del> Here's a motivating example<br>
<small> Temperature and humidity timeseries from a sensor beacon </small> </h2>
<iframe src="https://app.initialstate.com/embed/#/tiles/AVwqkydWmjV2yRC8TP1oxRYpl4zuIttl" style="width:100%; height:860px"></iframe>
<p> The above uses the <i>share by embed</i> feature of Initial State. You can also open the visualisation directly in your browser via <a href="https://app.initialstate.com/#/tiles/4707dec8-a185-4e83-bd22-a7930017b625" target="_blank">this link</a>. </p>
<h2> What's a BLE sensor beacon? </h2>
<p> A Bluetooth Low Energy (BLE) sensor beacon is a device which <i>spontaneously</i> transmits the data from its embedded sensors. Any listening devices in range can receive such messages. </p>
<p> Note that the transmitter and the receiver <i>do not</i> need to be paired, and a single transmission can be received by <i>multiple</i> listening devices. </p>
<p> The following non-exhausive list includes sensor beacons which are recognised by <a href="https://github.com/reelyactive/advlib#advlib" target="_blank">advlib</a>, our open source packet decoding library: </p>
<table class="table table-striped table-reelyactive">
<caption> SELECT BLE SENSOR BEACONS </caption>
<thead>
<tr>
<th> Manufacturer </th>
<th> Model </th>
<th> Sensors </th>
</tr>
</thead>
<tbody>
<tr>
<td> Minew </td>
<td> <a href="http://www.minewtech.com/minew-web-en/minew_sensor.html" target="_blank">S1</a> </td>
<td> Temperature, Humidity </td>
</tr>
<tr>
<td> Minew </td>
<td> <a href="http://www.minewtech.com/minew-web-en/minew_sensor.html" target="_blank">I7</a> </td>
<td> Acceleration (3-axis) </td>
</tr>
<tr>
<td> Estimote </td>
<td> <a href="https://estimote.com/" target="_blank">Sticker Beacon</a> </td>
<td> Temperature, Acceleration (3-axis) </td>
</tr>
</tbody>
</table>
<h2> Prerequisites </h2>
<h3> Sensor Beacon </h3>
<p> Obtain a sensor beacon from the list above, or any other sensor beacon whose packets you are able to decode. </p>
<h3> Listening Device </h3>
<p> This tutorial will assume you have either a <a href="https://shop.reelyactive.com/collections/starter-kits" target="_blank">reelyActive starter kit</a> or a BLE-capable Raspberry Pi and have completed the corresponding tutorial: </p>
<p class="text-center">
<a class="btn btn-default" href="install-a-starter-kit.html"
target="blank" role="button"> Install a Starter Kit </a>
<a class="btn btn-default" href="make-a-pi-hub.html"
target="blank" role="button"> Make a Pi Hub </a>
</p>
<h3> Initial State Account </h3>
<p> Create a (free) Initial State account or sign into your existing account: </p>
<p class="text-center">
<a class="btn btn-default" target="blank"
href="https://app.initialstate.com/#/register"
role="button"> Register </a>
<a class="btn btn-default" target="blank"
href="https://app.initialstate.com/#/login"
role="button"> Sign in </a>
</p>
<p> Then create a new Stream Bucket and note the <b>Bucket Key</b> and <b>Access Key</b> from the settings. </p>
<img src="images/sensorbeacon-initialstate-keys.jpg"
class="img-responsive center-block">
<h2> The code </h2>
<p> The following code example for Node.js will listen using a reelyActive minimal starter kit, and push the temperature and humidity data of a single Minew S1 beacon, as specified by its 48-bit identifier, to Initial State. </p>
<pre>
const barnowl = require('barnowl');
const initialstate = require('initial-state');
const BUCKET_KEY = 'BUCKETKEYGOESHERE'; // Update these from
const ACCESS_KEY = 'ACCESSKEYGOESHERE'; // Initial State settings
const SENSOR_MAC = 'ac233fa00000'; // From S1 Beacon label
var middleware = new barnowl();
var bucket = initialstate.bucket(BUCKET_KEY, ACCESS_KEY);
// This assumes minimal starter kit (see barnowl for where to listen)
middleware.bind( { protocol: 'serial', path: 'auto' } );
// Something was decoded
middleware.on('visibilityEvent', function(tiraid) {
var isMAC = (tiraid.identifier.value === SENSOR_MAC);
// Specified sensor beacon was decoded
if(isMAC) {
// Point to the data specific to this sensor
var minew = tiraid.identifier.advData.serviceData.minew;
// Push the sensor data values to the Initial State bucket
bucket.push('temperature', minew.temperature);
bucket.push('humidity', minew.humidity);
}
});
</pre>
<h3> Configuration </h3>
<p> If you happen to have a S1 beacon and a <a href="https://shop.reelyactive.com/products/starterkit-min" target="_blank">minimal starter kit</a>, the only configuration required is to update the <b>BUCKET_KEY</b>, <b>ACCESS_KEY</b> and <b>SENSOR_MAC</b>. </p>
<p> Update the <i>middleware.bind</i> parameters if you're using something other than a minimal starter kit (<a href="https://www.npmjs.com/package/barnowl#where-to-listen" target="_blank">see barnowl: Where to listen?</a>). </p>
<p> Update the sensor-specific code if you have a different sensor. </p>
<h3> Install and run </h3>
<p> Copy the configured code to a file called <b>server.js</b>. From that directory, from the command line, first install the barnowl and initial-state packages, and then run as follows: </p>
<pre>
npm install barnowl
npm install initial-state
node server</pre>
<h3> Considerations </h3>
<p> The above code will push <i>every</i> received packet to Initial State. Consider adjusting the update rate of the sensor beacon as appropriate (if possible) or limiting the update rate in the code. </p>
<p> Some sensor beacons will interweave packet types. Consider verifying that sensor data is indeed present in the received packet before pushing to Initial State. </p>
<h2> Don't give a hoot about sensor integration? </h2>
<img src="images/pareto-by-reelyactive.jpg"
class="img-responsive center-block"><br>
<p> Our Pareto platform combines the convenience of SaaS with plug-and-play hardware. Leave the sensor integration to us. </p>
<p class="text-center">
<a class="btn btn-primary" href="https://getpareto.com"
target="_blank" role="button"> Visit getpareto.com </a>
</p>
<hr>
<h2> What's next? </h2>
<p> Learn how to use a Raspberry Pi to collect and forward the sensor data (and so much more!), or learn how to create your own client-side sensor data visualisations using beaver.js, or return to the diyActive home page. </p>
<p class="text-center">
<a class="btn btn-default" href="make-a-pi-hub.html"
role="button"> Make a Pi Hub </a>
<a class="btn btn-default" href="build-web-apps-with-beaver.html"
role="button"> Build web apps with beaver.js </a>
<a class="btn btn-success" href="/"
role="button"> Return to diyActive </a>
</p>
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