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Making things sense-Day 2 (May 2011)
- 1. Making things sense Urban sensing and physical computing Day 2 (7-8 May 2011) Markus Rittenbruch QUT Urban Informatics / FAST & NICTA
- 2. Schedule - Day 2 • 12:00 - 12:10 Introduction • 12:10 - 12:30 Analogue sensors • 12:30 - 13:00 Activity • 13:00 - 14:00 Sharing sensor data • 14:00 - 14:10 Short break • 14:10 - 16:10 Project activity • 16:10 - 16:50 Project presentations • 16:50 - 17:00 Wrap up
- 3. Making things sense - Day 2
- 4. Programming
- 5. Programming Data types When variables are made to exceed their maximum capacity they "roll over" back to their minimum capacity, note that this happens in both directions. int x x = -32,768; x = x - 1; // x now contains 32,767 - rolls over in neg. direction x = 32,767; x = x + 1; // x now contains -32,768 - rolls over Float & casting:
- 6. Programming Float & casting: int x; int y; float z; x = 1; y = x / 2; // y now contains 0, ints can't hold fractions z = (float)x / 2.0; // z now contains .5 (you have to use 2.0, not 2)
- 7. Resources • Language reference: • http://www.arduino.cc/en/Reference/HomePage • http://arduino.cc/en/Reference/Extended • General code library: • http://arduino.cc/en/Reference/Libraries • Interfacing with hardware: • http://www.arduino.cc/playground/Main/InterfacingWithHardware • Examples • http://arduino.cc/en/Tutorial/HomePage
- 9. Analogue sensor pins • Use analogue in pins 0-5 for analogRead() • Address as 14-19 when used as digital pins • digitalWrite(), digitalRead() • No pinMode required for analogRead();
- 10. Analogue sensor input • File/Examples/Analog/AnalogInput
- 12. Programming Conditionals http://www.ladyada.net/learn/arduino/lesson5.html
- 13. AnalogInput
- 14. Calibration - part 1
- 15. Calibration - part 2 • map(): remap a number from one range to another • val = map(val, 0, 1023, 0, 255); • constrain(): constrain to a number range
- 16. Project activity 1 - Calibration
- 17. Components • RGB LED:
- 18. Components • LED matrix http://www.sparkfun.com/datasheets/Components/LED/YSM-1288CR3G2C.pdf
- 19. Components • MAX7219 LED driver http://arduino.cc/playground/Main/MAX72XXHardware http://www.arduino.cc/playground/Main/LEDMatrix
- 20. Project activity II - Projects
- 21. So, you’ve got an Arduino and now you want to make it talk
- 22. Or, maybe you want to talk to it...
- 23. ...from the other side of the world
- 24. This session of the workshop will show you some ways of doing that.
- 25. Arduino to the world • Arduino direct to Pachube via ethernet/wifi shield • Or Arduino to PC via serial, then to Pachube/Twitter • We’re taking the second approach in this workshop, since the kits we provided don’t include ethernet/wifi shields
- 26. Step 1: Register a feed on Pachube
- 29. Step 2: Write some code
- 30. Arduino Sketch
- 32. Ruby “Bridge”: the loop
- 33. Step 3: See your data on Pachube
- 35. Advanced topics • PCB design • Wireless communication • Xbee • Bluetooth • Wifi • Infrared • Radio • Real-time communication • Multi-tasking
- 36. Resources • http://apiwiki.twitter.com/ • http://community.pachube.com/api • http://community.pachube.com/tutorials • http://community.pachube.com/triggers/ twitter
- 37. What next? • Hackerspace Brisbane • http://hackerspaces.org/wiki/Hackerspace_Brisbane • Living Dolls (The Edge) • http://edgeqld.org.au/blog/2011/04/07/living-dolls/