#include <TinyGPS++.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#define GPS_BAUDRATE 9600  // The default baudrate of NEO-6M is 9600
TinyGPSPlus gps;  // the TinyGPS++ object
//GPIO where the DS18B20 is connected to
const int oneWireBus = 21;     

// Setup a oneWire instance to communicate with any OneWire devices
OneWire oneWire(oneWireBus);

// Pass our oneWire reference to Dallas Temperature sensor 
DallasTemperature sensors(&oneWire);
LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);
#define NTP_SERVER     "pool.ntp.org"
#define UTC_OFFSET (5.5 * 3600) // Indian Standard Time (IST) offset from UTC in seconds
#define UTC_OFFSET_DST (5.5 * 3600) // Daylight Saving Time (DST) offset from UTC in seconds

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 setup() {
  Serial.begin(115200); //between computer and esp
  Serial2.begin(GPS_BAUDRATE);//Serial for GPS UART

  Serial.println(F("ESP32 - GPS module_Simulation"));
  Serial.begin(115200); //between computer and esp
  Serial2.begin(GPS_BAUDRATE);//Serial for GPS UART
  Serial.println(F("ESP32 - GPS module_Simulation"));
   // Start the Serial Monitor
  
  // Start the DS18B20 sensor
  sensors.begin();
  // Start the LCD
   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() {
  if (Serial2.available() > 0) { 
    if (gps.encode(Serial2.read())) {
      if (gps.location.isValid()) {
        printLocalTime();
        Serial.print(F("Latitude: "));
        Serial.println(gps.location.lat(),6);

        Serial.print(F("Longitude: "));
        Serial.println(gps.location.lng(),6);

        Serial.print(F("Altitude: "));
        if (gps.altitude.isValid())
          Serial.println(gps.altitude.meters());
        else
          Serial.println(F("INVALID"));
      } else {
        Serial.println(F("Location: INVALID"));
      }

      Serial.print(F("Speed: "));
      if (gps.speed.isValid()) {
        Serial.print(gps.speed.kmph());
        Serial.println(F(" km/h"));
      } else {
        Serial.println(F("INVALID"));
      }

      Serial.print(F("GPS date&time: "));
      /*if (gps.date.isValid() && gps.time.isValid()) {
        //Serial.print(gps.date.year());
        Serial.print("2024");
        Serial.print(F("-"));
        //Serial.print(gps.date.month());
        Serial.print("02");
        Serial.print(F("-"));
        //Serial.print(gps.date.day());
        Serial.print("26");
        Serial.print(F(" "));
        Serial.print(gps.time.hour());
        Serial.print(F(":"));
        Serial.print(gps.time.minute());
        Serial.print(F(":"));
        Serial.println(gps.time.second());
      } else {
        Serial.println(F("INVALID"));
      }*/
      Serial.println();
    }
  }

  if (millis() > 5000 && gps.charsProcessed() < 10)
    Serial.println(F("No GPS data received: check wiring"));
// for DS18B20
sensors.requestTemperatures(); 
float temperatureC = sensors.getTempCByIndex(0);
float temperatureF = sensors.getTempFByIndex(0);
Serial.print(temperatureC);
Serial.println("ºC");
Serial.print(temperatureF);
Serial.println("ºF");
delay(5000);

}