// Arduino_LDR_6

#include <LiquidCrystal_I2C.h>

#define LED_GREEN 2
#define LED_YELLOW 3
#define LED_RED 4
#define LDR A0
#define NTC A1

#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

char animate[] = {'-', '\\', '|', '/'};
byte p = 0;

void setup() {
  Serial.begin(9600);
  pinMode(LDR, INPUT);
  pinMode(NTC, INPUT);
  pinMode(LED_GREEN, OUTPUT);
  pinMode(LED_YELLOW, OUTPUT);
  pinMode(LED_RED, OUTPUT);
  lcd.init();
  lcd.backlight();
}

int c = 0;
int light;
float temp;

void loop() {
  light = map(1024 - analogRead(LDR), 0, 1023, 0, 100);  
  temp = 1 / (log(1 / (1023. / analogRead(NTC) - 1)) / 3950 + 1.0 / 298.15) - 273.15;  
  p = (p == 3) ? 0 : ++p;
  //lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Light = ");
  lcd.print(light);
  lcd.print(" %     ");
  lcd.setCursor(15, 0);
  lcd.print(animate[p]);
  lcd.setCursor(0, 1);
  lcd.print("Temp  = ");
  lcd.print(temp);  
  lcd.print(" C     ");

  if (light >= 66) {
    digitalWrite(LED_RED, HIGH);
  } else {
    if (light >= 33) {
      digitalWrite(LED_YELLOW, HIGH);
    } else {
      digitalWrite(LED_GREEN, HIGH);
    }
  }
  delay(250);
  digitalWrite(LED_RED, LOW);  
  digitalWrite(LED_YELLOW, LOW);
  digitalWrite(LED_GREEN, LOW);
}