#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "DHT.h"
#define DHT22PIN 32
DHT dht(DHT22PIN, DHT22);
int i =0;
float GAMMA = 0.7;
float RL10 = 33;
int light = 25;
LiquidCrystal_I2C lcd1(0x27, 16, 2);
LiquidCrystal_I2C lcd2(0x3F, 16, 2);
byte customChar[] = {
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
  B11111
};
void setup() {
  lcd1.init();
  lcd2.init();
  pinMode(light, INPUT);
  dht.begin();
  lcd1.createChar(0, customChar);
}

void loop() {
  //light
  int lux = analogRead(light);
  float voltage = lux / 4096. * 3.3;
  float resistance = 2000 * voltage / (1 - voltage / 3.3);
  float val = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  lcd1.setCursor(0, 0);
  lcd1.print(val);
  if (val < 100) {
    lcd1.setCursor(0, 1);
    lcd1.write(byte(0));

  }else if (100<val<500){
    for(i;i<2;i++){
       lcd1.setCursor(i, 1);
    lcd1.write(byte(0));
    }
  }
 
  //dht
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  lcd2.setCursor(0, 0);
  lcd2.print("Nhiet Do:");
  lcd2.setCursor(11, 0);
  lcd2.print(t);
  lcd2.setCursor(0, 1);
  lcd2.print("Do Am:");
  lcd2.setCursor(11, 1);
  lcd2.print(h);
  delay(800); // this speeds up the simulation
}