// Learn about the ESP32 WiFi simulation in
// https://docs.wokwi.com/guides/esp32-wifi

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

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);

#define NTP_SERVER      "pool.ntp.org"
#define UTC_OFFSET      0
#define UTC_OFFSET_DST  0
#define PIN_DHT         4
#define TIPO_SENSOR     DHT22

unsigned long ultimaVezLeido      = 0;                  //Lectura de los sensores DHT
float         temp                = 0;
float         hum                 = 0;

DHT dht(PIN_DHT, TIPO_SENSOR);

void spinner() {
  static int8_t counter = 0;
  const char* glyphs = "\xa1\xa5\xdb";
  LCD.setCursor(15, 1);
  LCD.print(glyphs[counter++]);
  if (counter == strlen(glyphs)) {
    counter = 0;
  }
}

void printLocalTime() {
  struct tm timeinfo;
  if (!getLocalTime(&timeinfo)) {
    LCD.setCursor(0, 1);
    LCD.println("Connection Err");
    return;
  }

  LCD.setCursor(8, 0);
  LCD.println(&timeinfo, "%H:%M:%S");

  LCD.setCursor(0, 1);
  LCD.println(&timeinfo, "%d/%m/%Y   %Z");
}

void sensar(){
  if(millis() - ultimaVezLeido > 5000){
    float nuevaTemp = dht.readTemperature();
    float nuevaHum  = dht.readHumidity();
    if ( isnan(nuevaTemp) || isnan(nuevaHum) ){
      Serial.print("Tem: ");Serial.println("Error de lectura");
      Serial.print("Hum: ");Serial.println("Error de lectura");
    }else{
      temp = nuevaTemp;
      hum = nuevaHum;
      String m = "Tem: "+(String)temp;
      Serial.println(m);
      LCD.clear();
      LCD.setCursor(0,0);
      LCD.print(m);
      m = "Hum: "+(String)hum;
      Serial.println(m);
      LCD.setCursor(0,1);
      LCD.print(m);

      String texto = (String)temp;
      uint8_t largo = texto.length();
      Serial.print("Largo: ");Serial.println(largo);
    }
    ultimaVezLeido = millis();
  }
}

void setup() {
  Serial.begin(115200);

  dht1.begin();

  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print("Connecting to ");
  LCD.setCursor(0, 1);
  LCD.print("WiFi ");

  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
    spinner();
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  LCD.clear();
  LCD.setCursor(0, 0);
  LCD.println("Online");
  LCD.setCursor(0, 1);
  LCD.println("Updating time...");

  configTime(UTC_OFFSET, UTC_OFFSET_DST, NTP_SERVER);
}

void loop() {
  sensar();
  //printLocalTime();
  delay(250);
}