/*
  inputdevices_lm
  Reads two analogue inputs on A2 and A3 and sends results over RS232
  Turns on LED if temperature difference greater than set point.
  Developed as part of an assignment for Fab Academy 2017
  This example code is in the public domain.
*/

// the setup routine runs once when you press reset:
#include<SoftwareSerial.h>
SoftwareSerial mySerial(0,1); // Rx, TX
int temptrip = 52; //ADC count difference correspons to 30C
int tempdiff;
void setup() {
  // initialize serial communication at 9600 bits per second:
  mySerial.begin(9600);
  
  pinMode(8, OUTPUT);
}

// the loop routine runs over and over again forever:
void loop() {
  // read the input on analog pin 0:
  int sensorValue1 = analogRead(A2);
  int sensorValue2 = analogRead(A3);
  tempdiff =  sensorValue2 - sensorValue1;
  if(tempdiff > temptrip)
  {
    digitalWrite(8,HIGH);
   }
 else
  {
    digitalWrite(8,LOW);
     }
   
  //mySerial.print("ADC count difference is ");
  mySerial.println(tempdiff);
  //mySerial.print('\n');
    delay(1000);        // delay in between reads for stability
}