How to make a Heating and Cooling Jacket

Step 5 Writing the Code

Once you have all your sensors in the jacket you must write the code to get the LEDs to fade according to the temperature of the body.

1. Download the Lilypad program from

http://www.arduino.cc/en/Main/ArduinoBoardLilyPad

Then you will be able to program your Lilypad.

2. Plug in your Lilypad to the computer and make sure the settings in the Arduino program are selected for the right board. It should be the Lilypad Aurdino with ATmega328.

3. Copy and paste this code into the program:

 

int ledPin = 13;	// LED is connected to digital pin 13
int sensorPin0 = 0;	// temperature sensor is connected to analog pin 0
int sensorValue0;	// variable to store the value coming from sensor a0
int sensorPin1 = 1;	// temperature sensor is connected to analog pin 1
int sensorValue1;	// variable to store the value coming from sensor a1
int sensorPin2 = 2;	// temperature sensor is connected to analog pin a2
int sensorValue2;	// variable to store the value coming from sensor a2
int sensorPin3 = 3;	// temperature sensor is connected to analog pin 3
int sensorValue3;	// variable to store the value coming from sensor a3
int sensorPin4 = 4;	// temperature sensor is connected to analog pin 4
int sensorValue4;	// variable to store the value coming from sensor a4
int sensorPin5 = 5;	// temperature sensor is connected to analog pin 5
int sensorValue5;	// variable to store the value coming from sensor a5

// Output

int bluePin  = 10;  // Blue LED,  connected to digital pin 10
int redPin   = 11;   // Red LED,   connected to digital pin 11


// Program variables
int redVal   = 255; // Variables to store the values to send to the pins
int greenVal = 0;  // Initial values are Red full, Green and Blue off
int blueVal  = 0;

int wait = 10; // 50ms (.05 second) delay; shorten for faster fades


void setup()	 
{	 
         pinMode(ledPin, OUTPUT);	                         // sets the ledPin to be an output
         Serial.begin(9600);	                                 // initialize the serial port
         digitalWrite(ledPin, HIGH);	                         // turn the LED on
         pinMode(redPin,   OUTPUT);                              // sets the pins as output  
         pinMode(bluePin,  OUTPUT); 
}	 
 	 
void loop()	                                                 // run over and over again
{	
          Serial.println(" ");
          Serial.println(" ");
          Serial.println(" "); 
          Serial.println("Values");
          sensorValue0 = analogRead(sensorPin0);	// read the value from the sensor
          Serial.println(sensorValue0);	                // send that value to the computer
          sensorValue1 = analogRead(sensorPin1);	// read the value from the sensor
          Serial.println(sensorValue1);	                // send that value to the computer
          sensorValue2 = analogRead(sensorPin2);	// read the value from the sensor
          Serial.println(sensorValue2);	                // send that value to the computer
          sensorValue3 = analogRead(sensorPin3);	// read the value from the sensor
          Serial.println(sensorValue3);	                // send that value to the computer
          sensorValue4 = analogRead(sensorPin4);	// read the value from the sensor
          Serial.println(sensorValue4);            	// send that value to the computer
          sensorValue5 = analogRead(sensorPin5);	// read the value from the sensor
          Serial.println(sensorValue5);                 // send that value to the computer
          
             
          int sensorAverage = (sensorValue0+sensorValue1+sensorValue2+sensorValue3+sensorValue4+sensorValue5)/6;       // average the sensor values
          Serial.println("Sensor Average:");	        // send that value to the computer
          Serial.println(sensorAverage);	        // send that value to the computer
         
         
  if (sensorAverage < 175) // Cold phase of fades
  {
    if (redVal < 175) redVal     +=5; // Red down
    if (blueVal > 0) blueVal     -=5; // Blue up
  }
  else if (sensorAverage > 175) // Warm phase of fades
  {
    if (redVal  > 0) redVal      -=5; // Red up
    if (blueVal < 175) blueVal   +=5; // Blue down
   
  } 
   
    Serial.println("check color value:");
    Serial.println(redVal);
    Serial.println(blueVal);
    
  



  analogWrite(redPin,   redVal);   // Write current values to LED pins
  analogWrite(bluePin,  blueVal);  

          delay(1000);	                                        // delay for 1 second
          
          
}

       

4. Once you have the code, things get tricky... You will need to import the code to the Lilypad. Notice the UPLOAD button on the top of the program and the little button on the Lilypad. You will need to press down the button on the Lilypad. It should start blinking red and green. Soon after press the upload button and see if it successfully uploads.

*This may take a few tries: it is quite touchy.

5. Once it successfully uploads, you can click on the serial monitor and be able to read the temperature sensor readings.