#include <LiquidCrystal.h>

double refV;
double tL=25;
double tH=tL+1;

const int button6 = 6; //this button brings temp up
const int button7 = 7; //this button brings temp down
const int button8 = 8;

int speakerPin=10;
int numTones = 5;
int tones[] = {261, 294, 330, 370, 415};
int button6state = 0;
int button7state = 0;
int button8state = 0;

LiquidCrystal lcd(12,11,5,4,3,2);

void setup(){
  pinMode(button6, INPUT);
  pinMode(button7, INPUT);
  pinMode(button8, INPUT);
  pinMode(10, OUTPUT);
  pinMode(13,OUTPUT);
  
  lcd.begin(16,2);
  lcd.setCursor(0,0);
  lcd.print(tL);
  lcd.print(" to ");
  lcd.print(tH);
  
  analogReference(DEFAULT);
  
  refV=5;

  Serial.begin(9600);
  Serial.print("tL is: ");
  Serial.print("\t");
  Serial.println(tL);
  Serial.print("tH is: ");
  Serial.print("\t");
  Serial.println(tH);
  Serial.print("temp(C)");
  Serial.print("\t");
  Serial.println("status");
  Serial.println("________________");
  Serial.println("Beginning of Data: ");

}

void loop(){
  int acc=0;
  int N=10;
  
  for(int i=0 ; i < N; i++) {
    acc +=analogRead(0); delay(10);
  }

  double voltage= refV*acc/1023./(double(N));
  double tempC=(voltage)*100.;

  lcd.setCursor(0,1);
  lcd.print(tempC);

  button6state = digitalRead(button6); //code for button 6

  if ( button6state == HIGH ){
    tL = tL + 0.5;
    tH = tH + 0.5;
    
    lcd.setCursor(0,0);
    lcd.print(tL);
    lcd.print(" to ");
    lcd.print(tH);

    for(int i =0; i <numTones; i++){
      tone(speakerPin, tones[4]);
      delay(30)
    }
  noTone(speakerPin);
  }

if(tH > 55){
  for(int i =0; i<numTones; i++){
    tone(speakerPin, tones[0]);
    delay(100);
  }
  
  noTone(speakerPin);
  tH = 55;
  tL = 54;
  
  for(int i = 0; i < 3 ; i++){
    lcd.setCursor(9,0);
    lcd.print(" ");
    delay(300);
    lcd.setCursor(9,0);
    lcd.print(tH);
    delay(300);
  }
  
  if(tL < 20){
    for(int i =0; i<numTones; i++){
      tone(speakerPin, tones[2]);
      delay(100);
    }
    noTone(speakerPin);
    tH = 21;
    tL = 20;
    
    for(int i = 0; i < 3 ; i++){
      lcd.setCursor(0,0);
      lcd.print(" ");
      delay(300);
      lcd.setCursor(0,0);
      lcd.print(tL);
      delay(300);
    }
  }
  
  if (tempC<tL){
    digitalWrite(13,HIGH);
  }
  
  if(digitalRead(13)==HIGH){
    Serial.print(tempC);
    Serial.print("\t");
    Serial.println("1");
  }
  delay(50);
}