Putting your device in a browser or on the web
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Part of the Linux Conference Australia 2010 Arduino mini conference. Explains the various ways you can connect arduinos to the web and the internet.
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Putting your device in a browser or on the web
- 1. Arduino Miniconf Putting your device in a browser or on the web Justin Mclean Web: http://www.classsoftware.com.au Mail: justin@classsoftware.com.au Twitter: justinmclean Monday, 18 January 2010
- 2. Who am I? • Developing and creating web applications for 15 years • Programming for 25 years • Developer and trainer in Flex and ColdFusion • Based in Sydney Australia Monday, 18 January 2010
- 3. Arduino Overview of the Arduino Platform Monday, 18 January 2010
- 4. Arduino Code • Code in a C like high level language • Inbuilt functions to read and set digital and analog inputs and outputs • Includes libraries to perform common hardware or software tasks Monday, 18 January 2010
- 5. Arduino IDE Monday, 18 January 2010
- 6. Led Shield Demo Monday, 18 January 2010
- 7. Issues • Debugging can be hard • Memory, power and speed limits • Helps to have a little electronic knowledge Monday, 18 January 2010
- 8. Connecting Arduinos to the Web How Arduinos can communicate with the outside world. Monday, 18 January 2010
- 9. Connection Methods • Direct to computer • Wireless (XBee modems) • Ethernet or WiFi • “The Cloud” Monday, 18 January 2010
- 10. Supported Languages • Flash and Flex • Processing • Python • Ruby • Java • C, C++, C# and Objective C • .NET Monday, 18 January 2010
- 11. Direct Connection How to communicate with Arduinos via a computer Monday, 18 January 2010
- 12. Direct Communication • Most languages can’t talk USB • Solution: Socket to USB proxy Monday, 18 January 2010
- 13. Layers of Communication • Code Library • Proxy to USB • Program on arduino to USB Monday, 18 January 2010
- 14. Firmata Protocal • Standard Arduino library • Simple binary protocol • Based on MIDI • Easy to extend Monday, 18 January 2010
- 15. Computer Arduino Application Code Arduino Function Calls and Code Events TCP/IP USB Library USB Proxy Firmata Socket Cable Connection Diagram Monday, 18 January 2010
- 16. Firmata Demo Monday, 18 January 2010
- 17. Issues • Works best with a persistent connection • Otherwise startup time and auto reset may be issues • Proxy must be running on computer the Arduino is connected to Monday, 18 January 2010
- 18. Ethernet Using Arduino Ethernet Shields Monday, 18 January 2010
- 19. Ethernet Shields • Allow direct internet connection • No computer needed • Can act as web server or client • Shields need a little configuration Monday, 18 January 2010
- 20. Ethernet Shields Monday, 18 January 2010
- 21. Ethernet Arduino Code • Web server code • Easy to modify Monday, 18 January 2010
- 22. Ethernet Demo Monday, 18 January 2010
- 23. Pachube An easier way to connect Arduinos Monday, 18 January 2010
- 24. Pachube • Store and share and access realtime sensor data • Simple and secure • API to interact with all data and services • Graphs and maps Monday, 18 January 2010
- 25. Pachube Monday, 18 January 2010
- 26. Pachube Arduino Code • Runs on Arduino with an ethernet shield • Sends values to Pachube • Request values via Pachube Monday, 18 January 2010
- 27. Pachube API • Communicates over HTTP • Plain text (csv), XML or Jason • REST based • Large base of supported languages Monday, 18 January 2010
- 28. Pachube Triggers • Pachube can call an URL on value change • The URL can be a dynamic Monday, 18 January 2010
- 29. Why do this? • Expose yourself to new ideas and new ways of solving problems • Involves interaction with the real world • Encourages creativity • Makes you a better programmer Monday, 18 January 2010
- 30. It’s Fun! Monday, 18 January 2010
- 31. Useful Sites List of useful hardware and software sites Monday, 18 January 2010
- 32. Software Sites • Arduino http://www.arduino.cc for software, user forum and playground • Ethernet Shields http://arduino.cc/en/ Reference/Ethernet • Pachhub http://www.pachube.com/ Monday, 18 January 2010
- 33. Hardware Sites • Mind Kits (NZ) http://www.mindkits.co.nz/ • Spark Fun (US) http://www.sparkfun.com/ • Adafruit Industries (US) http:// www.adafruit.com/ • Electronic Goldmine (US) http:// www.goldmine-elec.com/ Monday, 18 January 2010
- 34. Other Sites • Lady Ada http://www.ladyada.net/ • Evil Mad Scientist http:// www.evilmadscientist.com/ • NY Resistor http://www.nycresistor.com/ • Make Zine http://makezine.com/ Monday, 18 January 2010