#include <LiquidCrystal.h> // Contains LiquidCrystal library
#include <FlexiTimer2.h> // Contains FlexiTimer2 Library

// initialize the libary with the numbers of the interface pins
LiquidCrystal lcd(11, 5, 4, 3, 2);

int tempPin = 4; // pin for temperature sensor
float tempVal; // store temperature value
int hour, minute, second; // records time

void setup() {
  // put your setup code here, to run once:
  lcd.begin(16, 2); // set up LCD's umber of columns and rows
  startingAnimation(); // dynamic start screen
  FlexiTimer2::set(1000, timerInt); // configure timer and interrupt function
  FlexiTimer2::start(); // start timer
  Serial.begin(115200); // baud rate 115220 symbols per second
  Serial.println("Input hour,minute,second to set time"); 
}

void loop() {
  // put your main code here, to run repeatedly:
  // get temperature
  tempVal = getTemp();
  if(second >= 60){ // 60 seconds --> 1 minute
    second = 0;
    minute++;
    if(minute >= 60){ // 60 minutes --> 1 hour
      minute = 0;
      hour++;
      if(hour >= 24){ // 24 hours --> 0 hours
        hour = 0;
      }
    }
  } 
  lcdDisplay(); // display temperature and time on LCD
  delay(200);
}

void startingAnimation(){
  for(int i = 0; i < 16; i++){
    lcd.scrollDisplayRight();
  }
  lcd.print("starting...");
  for(int i = 0; i < 16; i++){
    lcd.scrollDisplayLeft();
    delay(300);
  }  
  lcd.clear();
}

void timerInt(){
  second++;
}

void serialEvent(){
  int inInt[3];
  while(Serial.available()){
    for(int i = 0; i < 3; i++){
      inInt[i] = parseInt();
    }  
    Serial.print("Your input is: ");
    Serial.print(inInt[0]);
    Serial.print(", ");
    Serial.print(inInt[1]);
    Serial.print(", ");
    Serial.print(inInt[2]);

    Serial.print("Time now is: ");
    Serial.print(hour / 10);
    Serial.print(hour % 10);
    Serial.print(' :');
    Serial.print(minute/10);
    Serial.print(minute % 10);
    Serial.print(' :');
    Serial.print(second/10);
    Serial.println(second%10);
  }
}

void lcdDisplay(){
  lcd.setCursor(0,0);
  lcd.print("TEMP: ");
  lcd.print(tempVal);
  lcd.print("C");
  lcd.setCursor(0, 1);
  lcd.print("TIME: ");
  lcd.print(hour/10);
  lcd.print(hour % 10);
  lcd.print(' :');
  lcd.print(minute/10);
  lcd.print(minute%10);
  lcd.print(' :');
  lcd.print(second/10);
  lcd.print(second%10);
}

float getTemp(){
  int adcVal = analogRead(A4);

  float v = adc * 5.0/1024;

  float Rt = 10 * v / (5 - v);

  float tempK = 1 / (log(Rt / 10) / 3950 + 1 / (273.15 + 25));

  return tempK - 273.15;
}