#include <DHT.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define DHTTYPE DHT22
#define DHTPIN 12
#define BUTTON_PIN 4

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Wire.begin();
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  pinMode(BUTTON_PIN, INPUT_PULLUP);

  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print("Initializing...");
  LCD.setCursor(0,1);
  LCD.print("Program...");

  dht.begin();
}

void loop() {
  // scanI2C();

  // float h = dht.readHumidity();
  // float t = dht.readTemperature();

  if (digitalRead(BUTTON_PIN) == LOW) {
    Serial.println("Button pressed");
    getSensorReadings();
  }
  delay(100);
  
  // Serial.println("Humedad: "); 
  // Serial.println(h);
  // Serial.println("Temperatura: ");
  // Serial.println(t);
  // delay(2000);  
}

void getSensorReadings() {
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  LCD.init();
  LCD.setCursor(0, 0);
  LCD.print("T:");
  LCD.setCursor(3, 0);
  LCD.print(t);
  LCD.setCursor(0, 1);
  LCD.print("H:");
  LCD.setCursor(3, 1);
  LCD.print(h);
}

void scanI2C() {
  byte error, address;
  int devices;

  Serial.println("Scanning...");
  devices = 0;
  for (address = 1; address < 127; address++) {
    Wire.beginTransmission(address);
    error = Wire.endTransmission();

    if (error == 0) {
      Serial.print("I2C device found at address ox");
      if (address < 16) {
        Serial.print("0");
      }
      Serial.println(address, HEX);
      devices++;
    } else if (error == 4) {
      Serial.print("Unknown error at address 0x");
      if (address < 16) {
        Serial.print("0");
      }
      Serial.println(address, HEX);
    }
  }

  if (devices == 0) {
    Serial.println("No I2C devices found\n");
  } else {
    Serial.println("Done");
  }
  delay(5000);
}