Arduino IR Pet
This is code used in teaching an Arduino workshop. It combines a 16x2 character LCD, an IR LED, an IR photodetector, and a piezo speaker to form an electronic "pet" similar to a Tamogachi.
For assistance with this code, please post in the HeatSync Google Group in this thread:
Assembly
(Assembly instructions/photos here)
Libraries
Download and extract this ZIP into your arduino app's libraries folder-- resulting file structure should look like arduino\libraries\tone\tone.h File:Tone.zip
Code
/*
HeatSync Labs IR Pet
Demonstrates the use of a 16x2 LCD display, IR emitters and sensors, Piezo
The circuit:
* LCD PWR- pin to GND
* LCD PWR+ pin to +5V
* LCD RS pin to digital pin 7
* LCD Enable pin to digital pin 8
* LCD D4 pin to digital pin 9
* LCD D5 pin to digital pin 10
* LCD D6 pin to digital pin 11
* LCD D7 pin to digital pin 12
* Potentiometer:
* ends to +5V and ground
* center ("wiper") to LCD VO pin (LCD pin 3)
* Photodetector:
* connect to digital pin 3 with a resistor in between, and GND
* LED:
* connect to digital pin 2 with a resistor in between, and GND
* Piezo Speaker:
* connect to digital pin 5 and GND
Operation:
* Once powered on and this code uploaded, the LCD should show a HeatSync Labs splash screen followed by health and happiness gauges.
* If you can't see anything on the LCD, try adjusting the potentiometer. If you see garbled stuff, press the reset button on the arduino or double-check your wiring.
* To increase the pet's happiness, "feed" its IR photodetector with infrared light (possibly from its own infrared LED, or a remote control, or another pet's LED.)
* To increase the pet's health, "clean up" after it by making a loud noise into the piezo (try blowing on the piezo, it can act like a really weak microphone!)
* If you get continuous heart or smiley animations and noises, some of your sensors may be stuck on (i.e. the IR photodetector) or they might be wired incorrectly (my photodetector produces a 0 when active and 1 when inactive, for example.)
*/
// include the LCD library code:
#include <LiquidCrystal.h>
// include the RTTTL Tone (music) library:
#include <Tone.h>
/*
* This section for music settings
*/
Tone tone1;
#define OCTAVE_OFFSET 0
int notes[] = { 0,
NOTE_C4, NOTE_CS4, NOTE_D4, NOTE_DS4, NOTE_E4, NOTE_F4, NOTE_FS4, NOTE_G4, NOTE_GS4, NOTE_A4, NOTE_AS4, NOTE_B4,
NOTE_C5, NOTE_CS5, NOTE_D5, NOTE_DS5, NOTE_E5, NOTE_F5, NOTE_FS5, NOTE_G5, NOTE_GS5, NOTE_A5, NOTE_AS5, NOTE_B5,
NOTE_C6, NOTE_CS6, NOTE_D6, NOTE_DS6, NOTE_E6, NOTE_F6, NOTE_FS6, NOTE_G6, NOTE_GS6, NOTE_A6, NOTE_AS6, NOTE_B6,
NOTE_C7, NOTE_CS7, NOTE_D7, NOTE_DS7, NOTE_E7, NOTE_F7, NOTE_FS7, NOTE_G7, NOTE_GS7, NOTE_A7, NOTE_AS7, NOTE_B7
};
char *songA = "MissionImp:d=16,o=6,b=95:32d,32d#,32d,32d#,32d,32d#,32d,32d#,32d,32d,32d#,32e,32f,32f#,32g,g,8p";
char *songB = "shorter_r2d2:d=4,o=5,b=450:16c#7,16g#7,16f6,16a#7,16e7,16g#8,16e8,16g#6,16g7,16c#7,16g7,16f#8,16c#7,16f#6,16f8,16g#7,16g6,16a8,16c#8,16g6,16f#8,16g7,16f8,16a#6,16f#8,16d8,16g7,16g8,16c8,16g#6,16a8";
#define isdigit(n) (n >= '0' && n <= '9')
/*
* This section for custom characters on the LCD
*/
// blank
byte blank[8] = { B00000, B00000, B00000, B00000, B00000, B00000, B00000, B00000};
// smiley
byte smiley[8] = { B00000, B01010, B01010, B00000, B10001, B10001, B01110, B00000};
// heart
byte heart[8] = { B00000, B01010, B10101, B10001, B10001, B01010, B00100, B00000};
// chip
byte chip[8] = { B01110, B11111, B01110, B11111, B01110, B11111, B01110, B11111};
// heatsync logo
byte hsl_toplft[8] = { B00000, B00000, B00000, B00011, B00100, B00100, B01001, B01011};
byte hsl_toprt[8] = { B00000, B00000, B01010, B11010, B00101, B00111, B00010, B00011};
byte hsl_btmrt[8] = { B11010, B10110, B01111, B11001, B01100, B01110, B00000, B00000};
byte hsl_btmlft[8] = { B01000, B00100, B01100, B01011, B00010, B00110, B00000, B00000};
/*
* This section for public variables used for the program runtime
*/
LiquidCrystal lcd(7,8,9,10,11,12); // initialize the library with the numbers of the interface pins
int sensorValue = 0; // variable to store the value coming from the sensor
int ledPin = 2; // select the output pin for the IR LED
int sensorPin = 3; // select the input pin for the IR sensor
int speakerPin = 5; // select the output pin for the speaker
int speakerValue = 0; // variable to store whether the button is currently pushed
int buttonPin = 4; // select the input pin for the button
int health = 50; // starting "health"
int happy = 50; // starting "happiness"
int loopCounter = 0; // just a counter to space out events within the loop() below
void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// set up the speaker's pin number
tone1.begin(speakerPin);
// set up serial communication (back to the PC via USB for debugging)
Serial.begin(9600);
// declare the sensorPin as an INPUT:
pinMode(sensorPin, INPUT);
// write the sensorPin high
digitalWrite(sensorPin, HIGH);
// declare the ledPin as an OUTPUT:
pinMode(ledPin, OUTPUT);
lcd.createChar(0, blank);
lcd.createChar(1, smiley);
lcd.createChar(2, heart);
lcd.createChar(3, chip);
lcd.createChar(4, hsl_toplft);
lcd.createChar(5, hsl_toprt);
lcd.createChar(6, hsl_btmrt);
lcd.createChar(7, hsl_btmlft);
lcd.begin(16, 2);
showBootScreen();
delay(2000);
lcd.clear();
}
void loop() {
loopCounter++;
if(loopCounter > 400)
{
adjustHealth(-1);
loopCounter = 0;
makeDirty();
}
if(loopCounter % 100 == 0)
{
adjustHappy(-1);
}
showHealth();
showHappy();
digitalWrite(ledPin, HIGH);
// read the value from the sensor:
sensorValue = digitalRead(sensorPin);
if(sensorValue == 0) // for some reason IR transistors are 0 when light and 1 when dark?
{
Serial.println("Sensor");
feedChips();
}
// declare the speakerPin as an INPUT:
pinMode(speakerPin, INPUT);
delay(100);
speakerValue = digitalRead(speakerPin);
if(speakerValue == 1)
{
Serial.println("Speaker");
cleanUp();
}
delay(100);
}
void makeDirty() {
lcd.setCursor(random(4, 11) ,random(0, 2));
lcd.print(".");
delay(100);
}
void cleanUp() {
play_rtttl(songA);
adjustHealth(6);
writeAt(2,0,0);
delay(100);
writeAt(0,0,0);
writeAt(2,1,1);
delay(100);
writeAt(0,1,1);
writeAt(2,2,0);
delay(100);
writeAt(0,2,0);
writeAt(2,3,1);
delay(100);
writeAt(0,3,1);
writeAt(0,4,0);
writeAt(0,5,0);
writeAt(0,6,0);
writeAt(0,7,0);
writeAt(0,8,0);
writeAt(0,9,0);
writeAt(0,10,0);
writeAt(0,11,0);
writeAt(0,12,0);
writeAt(0,4,1);
writeAt(0,5,1);
writeAt(0,6,1);
writeAt(0,7,1);
writeAt(0,8,1);
writeAt(0,9,1);
writeAt(0,10,1);
writeAt(0,11,1);
writeAt(0,12,1);
}
void feedChips() {
play_rtttl(songB);
adjustHappy(8);
writeAt(3,0,0);
delay(100);
writeAt(0,0,0);
writeAt(3,1,1);
delay(100);
writeAt(0,1,1);
writeAt(3,2,0);
delay(100);
writeAt(0,2,0);
writeAt(3,3,1);
delay(100);
writeAt(0,3,1);
}
void writeAt(int character, int x, int y) {
lcd.setCursor(x, y);
lcd.write(character);
}
void adjustHealth(int diff){
if(health > 0)
{
health = health + diff;
}
if(health > 99)
{
health = 99;
}
}
void adjustHappy(int diff){
if(happy > 1 || diff > 0)
{
happy = happy + diff;
}
if(happy > 99)
{
happy = 99;
}
}
void showHappy() {
lcd.setCursor(13, 1);
lcd.write(1);
lcd.print(happy);
lcd.write(0);
}
void showHealth() {
lcd.setCursor(13, 0);
lcd.write(2);
lcd.print(health);
lcd.write(0);
}
void showBootScreen(){
lcd.setCursor(0, 0);
lcd.write(4);
lcd.write(5);
lcd.setCursor(0, 1);
lcd.write(7);
lcd.write(6);
lcd.setCursor(3, 0);
lcd.print("HeatSync Labs");
lcd.setCursor(3, 1);
lcd.print("BootROM v1337");
}
void play_rtttl(char *p)
{
// Absolutely no error checking in here
byte default_dur = 4;
byte default_oct = 6;
int bpm = 63;
int num;
long wholenote;
long duration;
byte note;
byte scale;
// format: d=N,o=N,b=NNN:
// find the start (skip name, etc)
while(*p != ':') p++; // ignore name
p++; // skip ':'
// get default duration
if(*p == 'd')
{
p++; p++; // skip "d="
num = 0;
while(isdigit(*p))
{
num = (num * 10) + (*p++ - '0');
}
if(num > 0) default_dur = num;
p++; // skip comma
}
//Serial.print("ddur: "); Serial.println(default_dur, 10);
// get default octave
if(*p == 'o')
{
p++; p++; // skip "o="
num = *p++ - '0';
if(num >= 3 && num <=7) default_oct = num;
p++; // skip comma
}
//Serial.print("doct: "); Serial.println(default_oct, 10);
// get BPM
if(*p == 'b')
{
p++; p++; // skip "b="
num = 0;
while(isdigit(*p))
{
num = (num * 10) + (*p++ - '0');
}
bpm = num;
p++; // skip colon
}
//Serial.print("bpm: "); Serial.println(bpm, 10);
// BPM usually expresses the number of quarter notes per minute
wholenote = (60 * 1000L / bpm) * 4; // this is the time for whole note (in milliseconds)
//Serial.print("wn: "); Serial.println(wholenote, 10);
// now begin note loop
while(*p)
{
// first, get note duration, if available
num = 0;
while(isdigit(*p))
{
num = (num * 10) + (*p++ - '0');
}
if(num) duration = wholenote / num;
else duration = wholenote / default_dur; // we will need to check if we are a dotted note after
// now get the note
note = 0;
switch(*p)
{
case 'c':
note = 1;
break;
case 'd':
note = 3;
break;
case 'e':
note = 5;
break;
case 'f':
note = 6;
break;
case 'g':
note = 8;
break;
case 'a':
note = 10;
break;
case 'b':
note = 12;
break;
case 'p':
default:
note = 0;
}
p++;
// now, get optional '#' sharp
if(*p == '#')
{
note++;
p++;
}
// now, get optional '.' dotted note
if(*p == '.')
{
duration += duration/2;
p++;
}
// now, get scale
if(isdigit(*p))
{
scale = *p - '0';
p++;
}
else
{
scale = default_oct;
}
scale += OCTAVE_OFFSET;
if(*p == ',')
p++; // skip comma for next note (or we may be at the end)
// now play the note
if(note)
{
// Serial.print("Playing: ");
//Serial.print(scale, 10); Serial.print(' ');
//Serial.print(note, 10); Serial.print(" (");
//Serial.print(notes[(scale - 4) * 12 + note], 10);
//Serial.print(") ");
//Serial.println(duration, 10);
tone1.play(notes[(scale - 4) * 12 + note]);
delay(duration);
tone1.stop();
}
else
{
//Serial.print("Pausing: ");
//Serial.println(duration, 10);
delay(duration);
}
}
}