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Exploring the Internet of Things Using Ruby

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Mike Hagedorn
Mike Hagedorn

The document discusses exploring the Internet of Things using Ruby. It covers using Ruby and USB to control a lamp, creating an IoT printer that prints tasks from a Mac, and building an IoT display to show tweets. It demonstrates connecting various devices like Arduino boards to the cloud and controlling them remotely through Ruby scripts and APIs.

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Exploring the Internet of Things with Ruby Lone Star Ruby Conf 2012
Exploring the Internet of Things Using Ruby
Man Versus Wild…
The Great Adventure
The Oh No Moment (aka – I am going to have to drink my urine)
Whoami Mike Hagedorn @mwhagedorn github.com/mwhagedorn
Agenda  Internet Of Things in General  Ruby and USB  The IOT Printer  The IOT Display
Agenda  Internet Of Things in General  Ruby and USB  The IOT Printer  The IOT Display
Internet of Things? Objects-> Internet -> Servers “Listen to your world, talk to the Internet” http://supermechanical.com/
Things Talk back
@MarsCuriosity
Botanicalls
IOT Devices  Arduino  Rasberry Pi  Twine
Agenda  Internet Of Things in General  Ruby and USB  The IOT Printer  The IOT Display
The USB Lamp Project http://www.thekua.com
The USB Lamp Project  libusb gem  open a context  browse for your device NOT Easy!  open the device  send message  close device
The USB Lamp Project  Lots of Questions  How do you send messages?  What is the form of the messages?
Use The Source Luke… void USBLamp::init() { char data1[8] = { 0x1f, 0x02, 0x00, 0x2e, 0x00, 0x00, 0x2b, 0x03 }; send(data1, sizeof(data1)); char data2[8] = { 0x00, 0x02, 0x00, 0x2e, 0x00, 0x00, 0x2b, 0x04 }; send(data2, sizeof(data2)); char data3[8] = { 0x00, 0x02, 0x00, 0x2e, 0x00, 0x00, 0x2b, 0x05 }; send(data3, sizeof(data3)); }
Use The Source Luke… void USBLamp::send(char *bytes, int size) { … CALL(usb_control_msg(…)) … }
Array#pack & String#unpack  pack  Array of numbers to a binary string [97,98,99].pack("c*") => "abc“  unpack  Binary string to array "abc".unpack("c*") => [97,98,99]
Demo
Agenda  Internet Of Things in General  Ruby and USB  The IOT Printer  The IOT Display
The IOT printer
The IOT printer
Arduino
Ethernet Shield
Arduino IDE
To Rad or Not To Rad
To Rad or Not To Rad
Tools You Can Trust
Use TextMate!
Use Terminal!  You can monitor the serial port via Terminal > ls /dev/tty.* > screen <dev> <baud-rate>  End with cntrl-A, cntrl-
IOT-Assistant github.com/newsinternational/iot-assistant
Architecture OAuth Tweets Calendars
Suiting It To Me Calendar Tasks News Twitter (Oauth)
Omnifocus Challenges  How can I get my tasks exported?  How can I get them up to the server?
Applescript
Applescript Dictionary
Exporting Omnifocus tasks #!/usr/local/bin/macruby framework 'Foundation' framework 'ScriptingBridge' OFOC = "com.omnigroup.Omnifocus” @of = SBApplication.applicationWithBundleIdentifier(OFOC) load_bridge_support_file 'Omnifocus.bridgesupport' @doc = @of.defaultDocument tasks = [] @doc.flattenedTasks.get.each do |task| tasks << task end
How can the server get this?  Omnifocus tried to solve this  Have to expose your desktop on internet  More work than most people want to do
Use HP Object Storage!
HpObjectStore Helper  Uses Fog def tasks_dir @connection.directories.get("omnifocus") end def update_tasks_file(content) tasks_dir.files.create(:key => "tasks.json", :body => content) end
Update Cloud Bucket  Run a chron job from my desktop server  All my omnifocus installs are already synced  Server gets a current task list
Outlook  Need my calendar  Don’t want to deal with corp security  Use the same omnifocus technique
The Printout
The Arduino Code
Demo
Agenda  Internet Of Things in General  Ruby and USB  Ruby and RFID  The IOT Printer  The IOT Display
The IOT Display Original Inspiration: http://bit.ly/vlMMvr
Arduino
32X8 Led Panel http://bit.ly/wyuE5V
WiFly
Fritzing Sketch
Using IOT-A  Already had an infrastructure  Already had a datasource  Format didn’t make sense for LED Display
User-Agent  Use two different User-Agent header values  User-Agent:IOTDisplay  User-Agent:IOTPrinter  JSON representation for display
Memory and the Sad Panda  Standard JSON parser took up too much memory  Char strings storage  Had to give up a key feature
Demo
HP Cloud For Free! https://www.hpcloud.com/free-trial @mwhagedorn Thanks! https://github.com/mwhagedorn/IOTDisplay.git https://github.com/mwhagedorn/iot_printer_remote.git https://github.com/mwhagedorn/iot-assistant.git https://github.com/mwhagedorn/thingspeak.git

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Exploring the Internet of Things Using Ruby

Editor's Notes

  1. How many of you have heard of Bear Grylls?
  2. The Grand AdventureThe Exciting BeginningThe Oh Oh MomentThe Big Finish
  3. Its not so important what those moments are..He overcomes, learns----- Meeting Notes (8/10/12 09:03) -----
  4. Developer Experience – user tools, management consoleDistributed Team About 15Subtext – I am interested in ways to automate what it means to be a remote team
  5. Also gonna talk about MacRuby, Automation using the scripting bridge
  6. Quote from the twine guys
  7. Contrast to 2004 yellowstone trip, when it was almost nowhere (JIWIre)Some kind of research about the growth of wifi availability
  8. Not the same as a bar code, you can write information to it.. Shelf life for instance, date stockedActive Example – tollway tags
  9. Industry, Retail – 3c per tag, hospitals
  10. This is a great book BTW.Most people think about the IOT being objects actively talking back
  11. Twine supermechincalWe arent gonna talk much the other stuff just due to time
  12. ----- Meeting Notes (8/10/12 22:51) -----14 minutes at USB Lamp
  13. My Episode 1
  14. Worth noting that this happens once in the c codeCould never get that to work in the ruby codeAlso the control message
  15. Worth noting that this happens once in the c codeCould never get that to work in the ruby codeAlso the control message
  16. Format specifier indicates signed 8 bit val (-127 to 127).. Why is this? Why not unsigned----- Meeting Notes (8/10/12 22:51) -----Demo at 18:20
  17. ----- Meeting Notes (8/10/12 22:51) -----Talk about the format of the color msg (37)
  18. Kit from AdafruitCode that ships with pulls tweetsTook me about two hours to put togetherSimple soldering
  19. Thermal printer, code that is listed for the kip pulls tweets
  20. Small device, low power, easy to interface to sensors, programmed in a C variant.. Only 30K of sram. Doesn’t run mruby
  21. Shields are expansion boards, they do lots of stuff, servo control data logging,
  22. Builds, uploads, provides docs, serial monitor. NOT Ruby.
  23. Code generatorGenerates C++ which gets pushed (arduino does this too)Problem is that step one part is kinda hard codedEvan Lights DSL generator -&gt; AST
  24. Code generatorGenerates C++ which gets pushed (arduino does this too)Problem is that step one part is kinda hard codedEvan Lights DSL generator -&gt; AST
  25. You can build, upload and view serial port all via textmate
  26. Rails APPSource is availableSchedule printoutsSelect what prints Do on demand printouts
  27. Google for OAUTHGoogle for CalendarTwitter for FeedsTimes of London for latest news
  28. I don’t use google tasks.. What do I doDeployed it on nova hpcs
  29. Old sample code omnifocus released (evan light worked on it)
  30. Applescript EditorApplescript allows you to automate apps on the platformMost apps have a scripting interfaceBut Applescript is kinda weird, suboptimal
  31. Allows you see if they have a scripting interface, and what commands are available
  32. Don’t want to use Applescript?Use MacRuby and the Scripting BridgeHave to build support files (basically a header file)This doesn’t show the export part…This doesn’t show filtering by projectI had issues with grabbing the project and its tasks throwing an exceptionHad to get them all then throw away ones I don’t want
  33. Putting my home machine on the net problematic. Omnifocus people gave you a rough howto and it was more work than people wanted to do
  34. Connection details are in the file…
  35. Show the omnifocus stuff added in
  36. We use Outlook
  37. You download the code from the website if you are an admin
  38. Reset printer firstLogin via serialPull SerialThen resetShow front pageUsing twitter oauthShow printoutsShow Settings pageShow printer downloadDo an on demand printoutSwitch to omnifocusUploadHPCS OSShow fileSkip OutlookOn Demand PrintShow template for printerLet it print
  39. I wanted a networked, display that listened on a socket and displayed messages.. Think CallerID. On demand messages
  40. Wanted to use the most common paradigm, i.e. wifiXbee – need other hardware..Bluetooth – can be flakyLast one really interesting(cheap)
  41. Yellow are controlRed powerBlack GndBlue DataGrey Read/Write
  42. Uses constraints to set the format on inbound request, so that that respond to block can handle it
  43. aJson wont fit… too little memory
  44. Probably not
  45. Time sensitive updates where getting dropped, mixing code for timing and logic.. Needed a solution
  46. Also cosm, open source version, running on HPCS
  47. On demand?, stop polling revisit rad?
  48. Chad Fowler’s book, faraday probably was quoting Benjamin Franklin