Codigo necesario para programar el arduino lilypad.

avakids.cpp

// Avakids by @avanet

/******************************************************************
--LilyPad Light Sensor Trigger - Automatic Night Light
--By KOOKYE
This example code reads the input from a LilyPad Light Sensor compares it to
a set threshold named 'dark'. If the light reading is below the threshold,
three LEDs will turn on and a tri-color led will change the color. 

Light Sensor connections:
  * S pin to A3
  * + pin to A5
  * - to -

Tri-color LED connections:
  * R pin to 11
  * B pin to 10
  * G Pin to 9
  * + Pin to 3

Connect an LED to pin 2
********************************************************************/
// The dark variable determines when we turn the LEDs on or off. 
// Set higher or lower to adjust sensitivity.
const int darkLevel = 50;

// Create a variable to hold the readings from the light sensor.
int lightValue;

// Set which pin the Signal output from the light sensor is connected to
// If using the LilyPad Development Board, change this to A6
int sensorPin = A3;

// Set which pin the LED is connected to. 
int led = 2;
int RGBled = 3;

void setup()
{
  // Set pin 3 to use as a power pin for the RGB led
  pinMode(3, OUTPUT);  
  digitalWrite(3, HIGH); 
  
  // Set sensorPin as an INPUT 
  pinMode(sensorPin, INPUT);

  // Set LED as outputs
  pinMode(led, OUTPUT);

  // Set pin 9 as outputs, turn on and turn off the green led 
  pinMode(9, OUTPUT);    
  digitalWrite(9, LOW);    
  delay(500);          
  digitalWrite(9, HIGH);  
  
  // Set pin 10 as outputs, turn on and turn off the blue led 
  pinMode(10, OUTPUT);
  digitalWrite(10, LOW);  
  delay(500);
  digitalWrite(10, HIGH);  

  // Set pin 11 as outputs, turn on and turn off the red led 
  pinMode(11, OUTPUT);
  digitalWrite(11, LOW);  
  delay(500);
  digitalWrite(11, HIGH);  

  // Set pin A5 to use as a power pin for the light sensor
  pinMode(A5, OUTPUT);
  digitalWrite(A5, HIGH); 

  // Initialize Serial, set the baud rate to 9600 bps.
  Serial.begin(9600);  
}

void loop()
{
  // Read the light sensor's value and store in 'lightValue'
  lightValue = analogRead(sensorPin);

  // Print some descriptive text and then the value from the sensor
  Serial.print("Light value is:");
  Serial.println(lightValue);

  // Compare "lightValue" to the "dark" variable
  if (lightValue <= darkLevel) // If the reading is less then 'darkLevel'
  {
      digitalWrite(led, HIGH); // Turn on green led 
      digitalWrite(9, LOW);
      digitalWrite(10,HIGH);
      digitalWrite(11, HIGH);
  }
    else // Otherwise, if "lightValue" is greater than "dark"
  {
    digitalWrite(led, LOW);  // Turn on red led
    digitalWrite(9, HIGH);
    digitalWrite(10, LOW);
    digitalWrite(11, HIGH);
  }

  // Delay so that the text doesn't scroll to fast on the Serial Monitor. 
  // Adjust to a larger number for a slower scroll.
  delay(100);
}