#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

#define LDR A0
#define NTC A1

#define RED 7
#define YELLOW 6
#define GREEN 5

void setup() {
  Serial.begin(9600);
  pinMode(LDR, INPUT);
  pinMode(NTC, INPUT);

  pinMode(RED, OUTPUT);
  pinMode(YELLOW, OUTPUT);
  pinMode(GREEN, OUTPUT);

  lcd.init();
  lcd.backlight();
}

int ldr_val;
int lux;

int ntc_val;
int temp;

void all_led_off() {
  digitalWrite(RED, 0);
  digitalWrite(YELLOW, 0);
  digitalWrite(GREEN, 0);
}

void lcd_print(int column, int line, String text) {
  lcd.setCursor(column, line);
  lcd.print(text);
}

void loop() {
  ldr_val = analogRead(LDR);
  ntc_val = analogRead(NTC);

  lux = map(ldr_val, 8, 1015, 100, 0);
  temp = map(ntc_val, 953, 115, -24, 80);

  Serial.print("Light = ");
  Serial.print(lux);
  Serial.print(" %");
  Serial.print(", Temp = ");
  Serial.println(temp);

  all_led_off();
  if (lux > 66) {
    digitalWrite(RED, 1);
  }
  else if (lux <= 33) {
    digitalWrite(GREEN, 1);
  }
  else {
    digitalWrite(YELLOW, 1);
  }

  lcd.clear();
  lcd_print(0, 0, "Light");
  lcd_print(6, 0, String(lux));
  lcd_print(9, 0, "%");

  lcd_print(0, 1, "Temp");
  lcd_print(6, 1, String(temp));
  lcd_print(9, 1, "C");

  delay(2000);
}