The LightBlue Bean: temperature sensor to make beer.

temperature_sensor.ino

static int8_t t = 0;

void setup() {
  // Initialize serial communication at 57600 bits per second:
  Serial.begin(57600);
  Bean.setLed(0, 0, 0);
}

void setLed(int8_t t, int fadeValue) {
  if (t > 22) { // If greater than 22C, set LED to Red.
    Bean.setLed(fadeValue, 0, 0); 
  }
  else if (t > 18) { // If between 15C and 30C, set LED to Green.
    Bean.setLed(0, fadeValue, 0); 
  }
  else { // If colder than 18C, set LED to Blue.
    Bean.setLed(0, 0, fadeValue); 
  }
}

void loop() {
  int8_t t = Bean.getTemperature();
  
  // Fade in from min to max in increments of 4 points:
  for (int fadeValue = 0; fadeValue <= 128; fadeValue += 4) {
    setLed(t, fadeValue);
    delay(30);
  }

  // Fade out from max to min in increments of 4 points:
  for (int fadeValue = 128; fadeValue >= 0; fadeValue -= 4) {
    setLed(t, fadeValue);
    delay(30);
  }

  Bean.sleep(15000);
}