Arduino & mbed Workshop + Hackathon

Transcription

1 Arduino & mbed Workshop + Hackathon

2 Rob Faludi! Arduino Basics

3 Pedro Perez! Intro to mbed

4 Goals Explore two paths to fast programmability with our radio modules in mind Learn their strengths and weaknesses first-hand Discover great tools for fast-prototyping new ideas Win prizes!

5 The Task! make a two-node device network, one node with Arduino and the second node with mbed

6 Suggested networks: doorbell with feedback (front and back door) Jeopardy buzzers - you can t ring in until allowed and your opponent is locked out when you ve buzzed rock paper scissors game networked dice game secret knock lock with code updated remotely! simple weather station for 2 locations (temperature, humidity, wind, barometer) security system warns when door or window is open too long two clocks that set themselves botanicalls! Your plant tweets when it is thirsty traffic lights, locally controlled with remote override street lights, locally controlled by sensors with remote schedule changes plus full override or your Fabulous Idea

7 Plan Intro to Arduino - 30 minutes Intro to mbed - 30 minutes Demo of Arduino Stacker - 10 minutes (Jonathan Young) Teaming - ~50 minutes, we suggest groups of two or three Hackathon session + Pizza Party: Wednesday night Presentations and Prizes: Thursday afternoon Parts Orders: Monday night is ideal (Final deadlines: Tuesday Adafruit before 9:30 am Central time. Sparkfun before 11:30 am Central time. Digi-key before 7:30 pm Central time.)

8 Prizes Prizes for three best projects Prize for all groups that complete both nodes

9 Experimentation and Discovery

10 Arduino

11 Arduino Web Site reference, learning, playground download software install drivers serial connection

12

13 Programming is Easy

14

15 Digital Input & Output

16 LEDs

17 ! Switches

18 Programming Digital in Arduino! myvariable = digitalread(pin);! digitalwrite(pin, value);

19 Analog Input

20 Variable Resistors

21 Photoresistors (LDRs)

22 Force Sensing Resistors (FSRs)

23 Other Analog Sensors accelerometers proximity sensors capacitive sensors current transformers infrared magneto (motion)

24 Programming Analog Input in Arduino! myvariable = analogread(pin);

25 Voltage Dividers Rt is the total of all the resistors Voltage at V1 = Vin * R1/Rt

26 Analog Output

27 Pulse Width Modulation (PWM)

28 Getting Analog from Digital vroom...vroom...vroom

29 Low-current PWM

30 Transistors Use a smaller voltage to control a larger voltage

31 Motors

32 Programming Analog Output in Arduino! analogwrite(pin, value);

33 Variables for ADC 10 bit input 0 to 1023 (which variable type?) 8 bit output 0 to 255 (which variable type?)

34 Servos

35 Servo Motors

36 Micro Servos

37 Pulse Width Determines Position

38 Libraries

39 Web Reference

40 Using Libraries path to libraries: Documents/Arduino/libraries including the library: #include <library.h> declaration: Object myinstance; setup myinstance.enable(7); commands myinstance.dostuff(27, 3);

41 Adding from menu

42 Standard Libraries EEPROM - reading and writing to "permanent" storage Ethernet - for connecting to the internet using the Arduino Ethernet Shield Firmata - for communicating with applications on the computer using a standard serial protocol. GSM - for connecting to a GSM/GRPS network with the GSM shield. LiquidCrystal - for controlling liquid crystal displays (LCDs) SD - for reading and writing SD cards Servo - for controlling servo motors SPI - for communicating with devices using the Serial Peripheral Interface Bus SoftwareSerial - for serial communication on any digital pins. Stepper - for controlling stepper motors TFT - for drawing text, images, and shapes on the Arduino TFT screen WiFi - for connecting to the internet using the Arduino WiFi shield Wire - Two Wire Interface (TWI/I2C) for sending and receiving data over a net of devices or sensors.

43 Contributed Libraries Communication: Messenger - for processing text-based messages from the computer NewSoftSerial - an improved version of the SoftwareSerial library OneWire - control devices (from Dallas Semiconductor) that use the One Wire protocol. PS2Keyboard - read characters from a PS2 keyboard. Simple Message System - send messages between Arduino and the computer SSerial2Mobile - send text messages or s using a cell phone (via AT commands over software serial) Webduino - extensible web server library (for use with the Arduino Ethernet Shield) X10 - Sending X10 signals over AC power lines XBee - for communicating with XBees in API mode SerialControl - Remote control other Arduinos over a serial connection Sensing: Capacitive Sensing - turn two or more pins into capacitive sensors Debounce - for reading noisy digital inputs (e.g. from buttons) Displays and LEDs: GFX - base class with standard graphics routines (by Adafruit) GLCD - graphics routines for LCD based on the KS0108 or equivalent chipset. Improved LCD library fixes LCD initialization bugs in official Arduino LCD library LedControl - for controlling LED matrices or sevensegment displays with a MAX7221 or MAX7219. LedControl - an alternative to the Matrix library for driving multiple LEDs with Maxim chips. LedDisplay - control of a HCMS-29xx scrolling LED display. Matrix - Basic LED Matrix display manipulation library PCD for the LCD controller on Nokia like displays (by Adafruit) Sprite - Basic image sprite manipulation library for use in animations with an LED matrix ST for the LCD controller on a 1.8", 128x160 TFT screen (by Adafruit) Audio and Waveforms: FFT - frequency analysis of audio or other analog signals Tone - generate audio frequency square waves in the background on any microcontroller pin! Motors and PWM: TLC channel 12 bit PWM controller.! Timing: DateTime - for keeping track of time in software. Metro - help you time actions at regular intervals MsTimer2 - uses the timer 2 interrupt to trigger an action! every N milliseconds. Utilities: PString - a lightweight class for printing to buffers Streaming - a method to simplify print statements

44 Servo Library

45 ! Servo including the library: #include <servo.h> declaration: Servo myservo; setup: myservo.attach(9); commands: myservo.write(110);

46 Serial Communications

47 One Question Quiz!! what is this: 10

48 Programming with Serial Serial.begin(speed) Serial.available() Serial.read() Serial.flush() Serial.write() Serial.print(data) also SoftwareSerial library lets you use any pins

49 XBees!

50 Arduino Shield

51 Arduino Shield

52

53 Your XBees ZigBee radios One Coordinator on every network C One or two routers R PAN IDs must match > C3, R3, R3

54 Remember! Use only +3.3 Volts. More than +7 Volts will kill your radio If you use a voltage regulator, always use decoupling capacitors. The radios often don t work without them. XBee TX goes to Arduino RX and vice versa. Unplug the TX & RX before uploading Arduino code (or use switches) Leonardo users Serial1 for hardware UART You can t send infinitely fast. Try putting a 10 ms delay into your loop.

55 Information Overload

56 Doorbells

57 Basic Doorbell

58 Feedback Doorbell

59 Nap Doorbell

60 XBee Arduino Stacker An XBee radio-sized Arduino-compatible microcontroller that can be stacked directly underneath the radio.! It is intended for use with devices that already use the XBee s 20-pin footprint.

61 XBee Arduino Stacker

62 Features I2C SPI 17 total digital i/o pins (14 Arduino, 4 XBee) 6 configurable as ADC analog inputs 4 configurable as PWM analog outputs 2 attachable interrupts USB serial programming wireless programming scriptable interruption of: all UART transactions XBee pin sleep controls local support for: association indicator commissioning button EEPROM multiple UARTs Use of all Arduino libraries, e.g. servo, stepper, displays, capacitive sensing, rfid, sd cards etc.

63

64

65 Jonathan Young

66 Arduino & mbed Workshop + Hackathon Rob Faludi & Pedro Perez

67