/*
 File to be named     LCDTemp01
  Temperature Sensor
  Reading temperature with LM35 sensor.
  
  Coded by: arduinoprojects101.com

Ollie Edited 01
  
*/

// include the library code:
#include <LiquidCrystal.h>

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(7, 8, 9, 10, 11, 12);

//declare variables
float tempC;
float tempF;
float Thigh;
float Tlow;
int tempPin = 1;

void setup(){
  
  // set up the LCD's number of columns and rows:
  lcd.clear();
  lcd.begin(16, 2);
  lcd.print("C=     TH=");
  lcd.setCursor(0, 1);
  lcd.print("F=     TL=");
  
  Tlow=98; // Initially sets the Tlow to something outragiously high. 
           // Without this it would default to 0.0

   // For Digital out test
   pinMode(6, OUTPUT);  // Defines pin13 as a digital output 
   digitalWrite(6, HIGH);

}
void loop(){
  
  // Temperature Calculations
    tempC = analogRead(tempPin);           //read the value from the sensor
  tempC = (5.0 * tempC * 100.0)/1024.0;  //convert the analog data to temperature
  tempF = ((tempC*9)/5) + 32;            //convert celcius to farenheit

// Determines and Sets Thigh and Tlow values

 if (Thigh < tempF){  //Checks to see if the Htemp is less than the current temp tempF
  Thigh = tempF;      // if so, it makes Htemp the same as tempF
 }

 if (Tlow > 94){      // 1. This the check to see if the program ha passed thru here already
                      // 2. If it has not, it will change the 98 value to current tempF
 Tlow = tempF;        // 3. here.  This condition can only be met on the first pass.
 }
 if (Tlow > tempF){   //After the program runs the loop the first time, line 1. will not be met
   Tlow = tempF;      //Normal check for lower temp. This will constantly.
 }

// External Digital Signal .. LED or Relay  Uses Digital pin 13 on Arduino


  if (tempF > 84) {
   digitalWrite(6, LOW);
   } else {
           digitalWrite(6,HIGH);
   }

// digitalWrite(6, HIGH);   // turn the LED on (HIGH is the voltage level)
 //  delay(100);              
 //  digitalWrite(6, LOW);    // turn the LED off by making the voltage LOW
//   delay(100);             






  // print result to lcd display

  lcd.setCursor(2, 0);
  lcd.print(tempC,1);
  lcd.setCursor(10, 0);
  lcd.print(Thigh,2); // the fix for loosing the right dec is changing the 0 to 1

  lcd.setCursor(2, 1);
  lcd.print(tempF,1);
  lcd.setCursor(10, 1);
  lcd.print(Tlow,2);
 
  // sleep...
  delay(1000);
}