DIY Technology for the Internet of Things
- 1. DIY Technology for the Internet of Things Dr. Simon Monk
- 2. Simon Monk • Full-‐;me Author -‐ Open Source Hardware and Electronics
- 3. Objec;ves • What is the Internet of Things (IoT)? • Where is IoT going • Making IoT devices? • An example technology: the Spark Core
- 4. 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
- 5. 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
- 6. Nest • Smart Learning Thermostat • WiFi enabled remote control from Smartphone app • Nest account allows link to ‘The Cloud’
- 7. RunKeeper • Uses Smartphone as IoT device but data stored in ‘The Cloud’ • Tracks running or cycling using GPS
- 8. 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
- 9. 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
- 10. Safecast So^ware • Hardware no good unless data gathered and visualised.
- 11. 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
- 12. 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
- 13. Technology for IoT • WiFi enabled Microcontrollers • Cellular modem technology
- 14. IoT on WiFi • Problem – WiFi is power hungry • Solu;on – Power Management of device (sleep when not needed)
- 15. IoT on WiFi • Problem – WiFi needs • Solu;on – One-‐;me password to connect to LAN (Local Area Network) configura;on • Temporary WLAN run by device
- 16. 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)
- 17. IoT on WiFi (Security) • Hacking gets physical! • An ahack on your actual home? • Cloud Programming of IoT Device! • Authen;ca;on Tokens • SSL
- 18. 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
- 19. DIY IoT • Arduino + WiFi shield – Looks old fasioned • Arduino Yun – Expensive • Spark Core – Designed for IoT
- 20. 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
- 21. 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
- 22. IoT with Spark Core • Example Project – Buzzy Bee
- 23. Test Hardware
- 24. Custom Program • Cloud IDE • Flash over Internet • Arduino C • Func;ons and Variables • REST interface
- 25. Test with curl
- 26. 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>!!
- 27. Make a Web Page (body) <body>! <h1>Buzzy Bee</h1> !! <h2 onClick="buzz()">BUZZ</h2>! <h2 onClick="noBuzz()">NO BUZZ</h2>! </body>! </html>!
- 28. Try it Live! • hhp://monkmakes.com/buzz.html
- 29. IoT with Spark Core • Example Project – Light Sensor • Hardware
- 30. 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);! }!
- 31. IoT with Spark Core
- 32. 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>!
- 33. Try it Live! • hhp://monkmakes.com/light.html
- 34. IoT Encapsulated • Low cost Module • All WiFi wrapped up • Simplifies design and shortens product development ;mes • Many products can benefit from adding IoT capability
- 35. 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
- 36. Contact • Twiher: @simonmonk2 • Web: www.monkmakes.com • Email: [email protected] • Blog: www.doctormonk.com