IBM Smarter Planet Instrumented Labs Smarter Health Arduino Lab

Transcription

1 March 2011 IBM Smarter Planet Instrumented Labs Smarter Health Arduino Lab

2 Agenda Arduino What is it? Hardware Summary Temperature Sensor Lab Step 1 Temperature Sensor Lab Step 2 Optional Temperature Sensor tasks Arduino Wrapup 2

3 Arduino What is it? In this lab session we ll learn a bit about the makeup and history of Arduino and use an Arduino to simulate a standalone temperature sensor. What is it? Arduino is a combination of hardware and software for micro controller development. Key Element in Smarter Planet Technology. Designed to be low cost, easy to use and standardized for ease of collaboration. Arduino is perfect for taking input from a variety of sensors and switches, can run simple logic programs and can control several devices. History. The project began in Italy in 2005 for student-built experiments. Named after a local bar where many design meetings were held, by 2010, over 120,000 Arduino boards have been shipped. 3

4 Arduino What is it? Today. Useful for enthusiasts and entrepreneurs because it has a simple programming language and environment, many tutorials, contributed code libraries and an active user community. Generic design means it may be inadequate for some performance critical environments. Programming. The programming language is a subset of C/C++, an Arduino program is called a sketch. The Arduino development environment consists of a Java based IDE including an editor, compiler and loader function and a Serial Comm Port Monitor. The base variable types of C are available including Boolean, char, int and float. 4

5 Arduino Use Examples LilyPad Arduino for wearables and e-textiles Boarduino early model fits on breadboard 5 Arduino IR Motion detector Silly String Shooter LilyPad controlled turn signal jacket

6 Arduino Hardware Summary Microcontroller - ATmega328 Voltage 5V Digital I/O Pins14 (of which 6 provide Pulse Width Modulation (PWM) output) Analog Input Pins 6 Flash Memory 32KB (ATmega328) of which 0.5 KB used by bootloader SRAM 2KB (ATmega328) EEPROM 1KB (ATmega328) Clock Speed16 MHz 6

7 Arduino Temperature Sensor Lab Step 1 Our Arduino lab consists of the following equipment: - Arduino UNO board w/usb cable, breadboard & LED, from for $ Celsius sensor ~$ Laptop with the Arduino development environment installed (available for Linux/Mac too) 7

8 Arduino Temperature Sensor Lab Development Environment 8

9 Arduino Temperature Sensor Lab Step 1... Arduino Temperature Sensor Lab #1: - Task for lab 1: simply fire up the temperature sensor, run some test measurements including touching the sensor with your thumb and forefinger, placing the sensor near your laptop output fan and getting some sample data points Arduino Temperature Sensor Steps: - Start the Arduino Development Environment by clicking on it s Desktop icon - Choose File-> Open and choose the program named SmarterPlanetLab1Sketch - Click the Upload icon to compile this sketch and load it on the board - Choose Tools -> Serial Monitor or click the icon - This should start the sensor running and you ll see output similar to this: - What happens to the Light sensor value when you shade the sensor with your hand? 9

10 Arduino Temperature Sensor Lab Step 2 Arduino Temperature Sensor Lab Step 2: - Task for this portion of the lab: We ll add code to: 1. Blink a green On light when the system is running and temp is adequate 2. Show the temperature in Fahrenheit 3. If temp is over a 23C turn on a red warning LED light - To start this lab, simply File -> Open and select SmarterPlanetLab2Sketch.pde Uncomment the code for the Temperature Conversion, the If statement for the temperature test and the print statement of the Fahrenheit temperature - Press the Upload icon to start the test running - Choose Tools -> Serial Monitor or click the icon - You should be able to cause the LED to light up just by touching the Temp sensor, if not you may need to tweak the temp test if statement. - Hint: If there are problems, the working solution is in Sketch 3, simply load it and run. 10

11 Optional Arduino Lab Steps Try one of these tasks if you have time: Load the additional Sketch called LabBlinkSketch, this will simply blink the LED light Or change the frequency with which we report (print) data, perhaps it would be more efficient to only print data every 30 seconds or if there is a >2 degree temperature change Configure Max temp so it has different behavior based on the light sensor output. Add a timestamp to the output. 11

12 Arduino UNO Reference Design 12