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

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

#define NTP_SERVER     "ntp.inti.gob.ar"
#define UTC_OFFSET     3
#define UTC_OFFSET_DST 3
#define DHTTYPE DHT22

const int DHTPin = 15;
DHT dht(DHTPin, DHTTYPE);

float tempC;
float humi;

void readDHT(){
  humi = dht.readHumidity();
  tempC = dht.readTemperature();  
  if (isnan(humi) || isnan(tempC)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }}

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 printSensors() {
  readDHT();
  LCD.setCursor(8, 0);
  //"Temp. "+String(tempC)+"C"
  LCD.println("Temp. "+String(tempC)+"C");
  LCD.setCursor(0, 1);
  LCD.println("Humedad. "+String(humi)+"%");
}

void setup() {
  Serial.begin(115200);
  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print("Conectando medio... ");
  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("Actualizando tiempo...");
  configTime(UTC_OFFSET, UTC_OFFSET_DST, NTP_SERVER);
}

void loop() {
  printLocalTime();
  delay(2500);
  printSensors();
  delay(3000);
}