#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "DHTesp.h"

#define LDR_PIN 34

LiquidCrystal_I2C lcd(0x27,16,2);
LiquidCrystal_I2C lcd2(0x28, 20, 4);


DHTesp dhtSensor; 

// LDR Characteristics
const float GAMMA = 0.7;
const float RL10 = 50;
int PURPLE = 19;
int YELLOW = 18;
int CYAN = 17;

void setup() {
  Serial.begin(115200);
  dhtSensor.setup(13,DHTesp::DHT22);
  lcd.init();
  lcd.init();  
  lcd.backlight();
  lcd.backlight();
  pinMode(PURPLE, OUTPUT);
  pinMode(YELLOW, OUTPUT);
  pinMode(CYAN, OUTPUT);

  pinMode(LDR_PIN, INPUT);

  lcd2.init();
  lcd2.backlight();
 
}

void loop() {
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");

  if (data.temperature>35){
    Serial.println("Hot!");
    lcd.setCursor(5, 0);
    lcd.print("Too Hot!");
    digitalWrite(PURPLE, HIGH);
    digitalWrite(YELLOW, LOW);
    digitalWrite(CYAN, LOW);
  }
  else {
    Serial.println("Normal");
    lcd.setCursor(5, 0);
    lcd.print("Normal");
    digitalWrite(PURPLE, LOW);
    digitalWrite(YELLOW, HIGH);
    digitalWrite(CYAN, LOW);
  }
    if (data.temperature<10){
    Serial.println("Cold!");
    lcd.setCursor(5, 0);
    lcd.print("Too Cold!");
    digitalWrite(PURPLE, LOW);
    digitalWrite(YELLOW, LOW);  
    digitalWrite(CYAN, HIGH);
  }
  
  delay(500);

  int analogValue = analogRead(34);
  float voltage = analogValue / 4096. * 3.3;
  float resistance = 3000 * voltage / (1 - voltage / 3.3);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

  lcd2.setCursor(2, 0);
  lcd2.print("Room: ");
  if (lux > 50) {
    lcd2.print("Light!");
  } else {
    lcd2.print("Dark  ");
  }

  lcd2.setCursor(0, 1);
  lcd2.print("Lux: ");
  lcd2.print(lux);
  lcd2.print("          ");

  delay(100);
}