#include <DHT.h>

#define DHT_Pin 15
#define led 25
#define led2 27
#define ldr_pin A12
#define DHTTYPE DHT22


DHT DHT_sensor(DHT_Pin, DHTTYPE);

float hum;
float temp;
int light;

const float GAMMA = 0.7;
const float RL10 = 33;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  DHT_sensor.begin();
  pinMode(ldr_pin, INPUT);
  pinMode(led, OUTPUT);
  pinMode(led2, OUTPUT);
}

void loop() {
  
  ldr();
  delay(1000);
  suhu();
  delay(1000);
}

void suhu(){
  hum = DHT_sensor.readHumidity();
  temp = DHT_sensor.readTemperature();//read temperatur (°C)

  if(hum > 50.0 && temp > 30.0){
    digitalWrite(led, HIGH);
  }
  else{
    digitalWrite(led, LOW);
  }
    Serial.print("Humidity: ");
    Serial.print(hum);
    Serial.print(" %,");
    Serial.print("Temperature: ");
    Serial.print(temp);
    Serial.print(" °C");
    Serial.println();
    delay(1000);
}

void ldr(){
int light = analogRead(ldr_pin);
  float voltage = light / 4096. * 3.3;
  float resistance = 2000 * voltage / (1 - voltage / 3.3);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  Serial.print("Room: ");
   if (lux > 50) {
    digitalWrite(led2, HIGH);
    Serial.print("Light! ");
  } else {
    digitalWrite(led2, LOW);
    Serial.print("Dark  ");
  }
  Serial.print("Lux: ");
  Serial.println(lux);
delay(1000);
}