New Textiles 2011

One Response to “Temperature Sensing Hat”

1. greatjudy says:

   March 9, 2011 at 12:09 am

   Here is our experiment of the codes:
   1.AnalogReadSerial:

   /*
   AnalogReadSerial
   Reads an analog input on pin 0, prints the result to the serial monitor

   This example code is in the public domain.
   */

   int roomTemperature = 689;

   void setup() {
   Serial.begin(9600);
   analogReference(INTERNAL);
   }

   void loop() {
   int sensorValue = analogRead(A0);
   Serial.println(sensorValue, DEC);
   analogWrite(9, sensorValue – roomTemperature);
   }

   2. Calibration:

   /*
   Calibration

   Demonstrates one technique for calibrating sensor input. The
   sensor readings during the first five seconds of the sketch
   execution define the minimum and maximum of expected values
   attached to the sensor pin.

   The sensor minimum and maximum initial values may seem backwards.
   Initially, you set the minimum high and listen for anything
   lower, saving it as the new minimum. Likewise, you set the
   maximum low and listen for anything higher as the new maximum.

   The circuit:
   * Analog sensor (potentiometer will do) attached to analog input 0
   * LED attached from digital pin 9 to ground

   created 29 Oct 2008
   By David A Mellis
   Modified 4 Sep 2010
   By Tom Igoe

   http://arduino.cc/en/Tutorial/Calibration

   This example code is in the public domain.

   */

   // These constants won’t change:
   const int sensorPin = A0; // pin that the sensor is attached to
   const int ledPin = 9; // pin that the LED is attached to
   const int ledPin2 = 3;

   // variables:
   int sensorValue = 0; // the sensor value
   int sensorMin = 1023; // minimum sensor value
   int sensorMax = 0; // maximum sensor value

   void setup() {
   Serial.begin(9600);
   // turn on LED to signal the start of the calibration period:
   analogReference(INTERNAL);
   pinMode(13, OUTPUT);
   digitalWrite(13, HIGH);

   // calibrate during the first five seconds
   while (millis() < 5000) {
   sensorValue = analogRead(sensorPin);
   Serial.println(sensorValue);

   // record the maximum sensor value
   if (sensorValue > sensorMax) {
   sensorMax = sensorValue;
   }

   // record the minimum sensor value
   if (sensorValue < sensorMin) {
   sensorMin = sensorValue;
   }
   }

   // signal the end of the calibration period
   digitalWrite(13, LOW);
   }

   void loop() {
   // read the sensor:
   sensorValue = analogRead(sensorPin);
   sensorValue += analogRead(sensorPin);
   sensorValue += analogRead(sensorPin);
   sensorValue += analogRead(sensorPin);
   sensorValue += analogRead(sensorPin);
   sensorValue /= 5;

   int difference = sensorValue - sensorMin;

   Serial.print(sensorMin);
   Serial.print(" ");
   Serial.println(sensorValue);
   // apply the calibration to the sensor reading
   //sensorValue = map(sensorValue, sensorMin, sensorMax, 0, 255);

   // in case the sensor value is outside the range seen during calibration
   //sensorValue = constrain(sensorValue, 0, 255);

   // fade the LED using the calibrated value:
   //analogWrite(ledPin, sensorValue);

   // if (sensorValue - sensorMin > 5) {
   // analogWrite(ledPin, 255);
   // } else {
   // analogWrite(ledPin, 0);
   // }

   if (sensorValue – sensorMin == 1) {
   analogWrite(ledPin, 1);
   } else if (sensorValue – sensorMin == 2) {
   analogWrite(ledPin, 2);
   } else if (sensorValue – sensorMin == 3) {
   analogWrite(ledPin, 4);
   } else {
   analogWrite (ledPin, 255);
   }

   //analogWrite(ledPin, sensorValue – sensorMin);
   if (difference > 0 && difference < 10) {
   analogWrite(ledPin2, 2);
   } else if (difference >= 10 && difference < 20) {
   analogWrite(ledPin2, 3);
   } else if (difference >= 20 && difference < 30) {
   analogWrite(ledPin2, 6);
   } else if (difference >= 30 && difference < 40) {
   analogWrite(ledPin2, 10);
   } else if (difference >= 40 && difference < 50) {
   analogWrite(ledPin2, 20);
   } else if (difference >= 50 && difference < 60) {
   analogWrite(ledPin2, 40);
   } else {
   analogWrite (ledPin2, 255);
   }
   }