diy technology for the internet of things

DIY Technology for the Internet of Things

Dr. Simon Monk

Simon Monk

•  Full-‐;me Author -‐ Open Source Hardware and Electronics

Objec;ves

•  What is the Internet of Things (IoT)? •  Where is IoT going •  Making IoT devices? •  An example technology: the Spark Core

What is the Internet of Things?

•  First there was the Internet – Websites serve knowledge – Browsers are the terminal nodes of the network

•  Now the Internet of Things –  IoT devices can be terminal nodes – Websites control hardware – Devices talk to users and other machines using the Internet

IoT Examples •  Home automa;on –  Smart thermostats (Nest and similar) –  Ligh;ng, access control

•  Automo;ve •  Personal – Health and ac;vity monitoring (on your wrist) –  Keeping an eye on distant loved-‐ones

•  Sensor Networks –  Radia;on monitoring following Fukushima disaster

•  Energy Management –  Smart appliances

Nest

•  Smart Learning Thermostat

•  WiFi enabled remote control from Smartphone app

•  Nest account allows link to ‘The Cloud’

RunKeeper

•  Uses Smartphone as IoT device but data stored in ‘The Cloud’

•  Tracks running or cycling using GPS

Safecast •  In response to Fukushima –  Official informa;on inadequate –  It filled the informa;on gap – Crowd-‐sourced solu;on in place reassuring people very quickly

•  Hacker Space, OSH (Open Source Hardware) Design, Data CC 0 (Completely free to all)

•  Watching the planet – Global warming, tsunami, magnetometry

Safecast Hardware

•  Geiger Counters all sold out •  Data logging Geiger Counter •  HackerSpace First Genera;on

•  Hang device out of car window (GPS)

•  Arduino, off-‐the-‐shelf modules

Safecast So^ware

•  Hardware no good unless data gathered and visualised.

Energy Management

•  Smart Meters – Send usage data to server every few minutes – Eventually con;nuously variable energy pricing – Automa;c control of non ;me-‐cri;cal appliances •  Run washing machine when demand low •  Boost freezer to low temperature at low demand

Where is IoT Going?

•  Gartner Report on IoT 2014 Predicts – 36.2% growth in 2015 – Home and Automo;ve will drive growth –  Inexpensive devices are the biggest enabler of IoT takeup

Technology for IoT

•  WiFi enabled Microcontrollers •  Cellular modem technology

IoT on WiFi

•  Problem

– WiFi is power hungry

•  Solu;on

– Power Management of device (sleep when not needed)

IoT on WiFi

•  Problem

– WiFi needs password to connect to LAN (Local Area Network)

•  Solu;on

– One-‐;me configura;on

•  Temporary WLAN run by device

IoT on WiFi

•  On LAN communica;ng with Internet

•  Send requests to IoT device from Internet (E.g. Open Door!)

•  Allow IoT device to send data to cloud (E.g. Temperature is 20C)

IoT on WiFi (Security)

•  Hacking gets physical! •  An ahack on your actual home?

•  Cloud Programming of IoT Device!

•  Authen;ca;on Tokens •  SSL

IoT on WiFi (Data Ownership)

•  Physical Data Collected – E.g. Energy usage –  Is the home empty? – Targeted marke;ng of products – The Cloud knows you too well? – Health data – Smart TV viewing habits

DIY IoT

•  Arduino + WiFi shield – Looks old fasioned

•  Arduino Yun – Expensive

•  Spark Core – Designed for IoT

IoT with Spark Core

•  WiFi •  ARM Cortex M3 (72MHz) •  128kB Flash •  USB2.0 •  12 bit ADC •  USART, SPI & I2C •  Breadboard Friendly •  18 I/O pins (3V) logic

IoT with Spark Core

•  Configura;on Smartphone App

•  USB Configura;on •  Registers with Cloud •  Built-‐in Firmware works with Smartphone App to control pins

•  Program from the Cloud

IoT with Spark Core •  Example Project – Buzzy Bee

Test Hardware

Custom Program

•  Cloud IDE •  Flash over Internet

•  Arduino C •  Func;ons and Variables

•  REST interface

Test with curl

Make a Web Page (head) <html>!<head>!<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js" type="text/javascript" charset="utf-8"></script>!!<script>!var accessToken = "64a329ab1ddfaabc01838f744c0e5e243eee";!var url = "https://api.spark.io/v1/devices/55ff6b065075551487/buzz";!!function buzz()!{!

!$.post(url, {params: 1, access_token: accessToken });!} !!function noBuzz()!{!

!$.post(url, {params: 0, access_token: accessToken });!

} !</script>!</head>!!

Make a Web Page (body) <body>!<h1>Buzzy Bee</h1> !!<h2 onClick="buzz()">BUZZ</h2>!<h2 onClick="noBuzz()">NO BUZZ</h2>!</body>!</html>!

Try it Live!

•  hhp://monkmakes.com/buzz.html

IoT with Spark Core •  Example Project – Light Sensor •  Hardware

IoT with Spark Core •  Example Project – Light Sensor •  So^ware int light = 0.0;!!void setup(){! Spark.variable("light", &light, INT);!}!!void loop() {! light = analogRead(lightSensorPin);!}!

IoT with Spark Core

IoT with Spark Core (Web Page) function getLight()!{!

!$.getJSON(url, gotResult);!!after()!

} !!function gotResult(result) !{!

!!!$("#light").html(result.result);!

}!!setInterval(getLight, 1000);!!!<h2 style="font-size:40pt;"id="light">-</h2>!

Try it Live!

•  hhp://monkmakes.com/light.html

IoT Encapsulated

•  Low cost Module •  All WiFi wrapped up •  Simplifies design and shortens product development ;mes

•  Many products can benefit from adding IoT capability

Summary

•  More and more devices are being connected to the Internet

•  With low-‐cost modules that can act as a microcontroller with IoT almost for free, adding it to a product becomes feasible

•  The Open Source movement is changing aptudes to who owns data – slowly

Contact

•  Twiher: @simonmonk2 •  Web: www.monkmakes.com •  Email: [email protected]

•  Blog: www.doctormonk.com