#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>
#include "DHT.h"

#define DHTPIN 5
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);

#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW

#define MAX_DEVICES 24
#define CLK_PIN   13
#define DATA_PIN  11
#define CS_PIN    10

MD_Parola myDisplay = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);

unsigned long lastTime = 0;
unsigned long timerDelay = 5000;

int ldr ;
const float Rref = 10000;
const float RL10 = 50;
const float GAMMA = 0.7 ;

float volt ;
float R ;
float lux = 0.0;
float humidity ;
float temperature ;
String data ;
String Lux = "00";

void setup() {
  Serial.begin(9600);
  myDisplay.begin();
  myDisplay.setIntensity(15);
  myDisplay.displayClear();
  dht.begin();

}

void loop() {

  ldr = analogRead(A0);
  volt = ldr / 1024. * 5;
  R = Rref * (1 / ((5 / volt) - 1));
  lux = pow(RL10 * 1e3 * pow(10, GAMMA) / R, (1 / GAMMA));
  if (lux < 10) {
    lux = 0.0;
  }
  Lux = String(lux);
  humidity = analogRead(A1);
  temperature = analogRead(A1);
  data = String(humidity) + String("  ") + String(temperature) + String("  ") + String(lux, 0);
  myDisplay.setTextAlignment(PA_LEFT);

  myDisplay.print(data);
  delay(500);
}