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/* -------------------------------------------------------
Analog IR Temperature Gauge: written by ScottC on 1st Dec 2012.
http://arduinobasics.blogspot.com/2012/12/arduino-basics-analog-ir-temperature.html


 * Some of the code was adapted from a sketch by Andy Gelme (@geekscape)
 * For more information on using the IRTEMP 
 see www.freetronics.com/irtemp
 
 * IRTemp library uses an Arduino interrupt:
 * If PIN_CLOCK = 2, then Arduino interrupt 0 is used
 * If PIN_CLOCK = 3, then Arduino interrupt 1 is used
 ---------------------------------------------------------*/

#include "IRTemp.h"
#include <Servo.h> 

Servo servo1;
static const byte PIN_DATA = 2;
static const byte PIN_CLOCK = 3; // Must be either pin 2 or pin 3
static const byte PIN_ACQUIRE = 4;

static const bool SCALE=false; // Celcius: false, Farenheit: true

/* Used to capture the temperature from the IRTEMP sensor */
float irTemperature;
int temp;

/* The minimum and maximum temperatures on the gauge. */
static const int minTemp = -45;
static const int maxTemp = 135;


/* The servo minimum and maximum angle rotation */
static const int minAngle = 0;
static const int maxAngle = 175;
int servoPos;

IRTemp irTemp(PIN_ACQUIRE, PIN_CLOCK, PIN_DATA);



/*----------------------SETUP----------------------*/

void setup(void) {
 
 servo1.attach(9); // turn on servo
}


/*-----------------------LOOP-----------------------*/

void loop(void) {
 irTemperature = irTemp.getIRTemperature(SCALE);
 printTemperature("IR", irTemperature);

 /* If you want the ambient temperature instead - then use the code below. */
 //float ambientTemperature = irTemp.getAmbientTemperature(SCALE);
 //printTemperature("Ambient", ambientTemperature);

}

/*-----------printTemperature function---------------*/

void printTemperature(char *type, float temperature) {
 
 temp=(int) temperature;
 servoPos = constrain(map(temp, minTemp,maxTemp,minAngle,maxAngle),minAngle,maxAngle);
 
 if (isnan(temperature)) {
 //is not a number, do nothing
 }
 else {
 
 /* To test the minimum angle insert the code below */
 //servoPos = minAngle;
 
 /*To test the maximum angle, insert the code below */
 //servoPos = maxAngle;

 /* Rotate servo to the designated position */
 servo1.write(servoPos);
 }
}