#include <LiquidCrystal.h>
LiquidCrystal lcd (7,6,5,4,3,2);

int tempPin = A1;
int fan = 11;
int led = 8;

int temp;
int tempMin = 20;
int tempMax = 26;

int fanSpeed;
int fanLCD;

void setup () {
  pinMode (fan, OUTPUT);
  pinMode (led, OUTPUT);
  pinMode (tempPin, INPUT);

  lcd.begin (16, 2);
}

void loop () {
  temp = readTemp ();

  if (temp < tempMin) {
    fanSpeed = 0; 
    digitalWrite (fan, LOW);
  }
  
  if ( (temp >= tempMin) && (temp <= tempMax) ) { 
    fanSpeed = map (temp, tempMin, tempMax, 32, 255);
    fanLCD = map (temp, tempMin, tempMax, 0, 100); 
    analogWrite (fan, fanSpeed); 
  } 
  
  if(temp > tempMax) {
    digitalWrite (led, HIGH);
  }

  else {
    digitalWrite (led, LOW);
  }

  lcd.print ("Temp: ");
  lcd.print (temp);
  lcd.print ("C ");
  
  lcd.setCursor (0, 1);
  lcd.print ("Fan: ");
  lcd.print (fanLCD);
  lcd.print ("%");
  delay (200);
  lcd.clear ();
}

int readTemp () {
  temp = analogRead (tempPin);
  return temp * 0.48828125;
}