Wokwi - Online ESP32, STM32, Arduino Simulator

#include <WiFi.h>         //wifi library
#include <LiquidCrystal_I2C.h>          //lcd library
#include <EEPROM.h>
#define PTC 34

WiFiServer server(80);          //zapne web server na porte 80
LiquidCrystal_I2C lcd(0x27, 16, 2);         //init lcd display

//premenne:         
String header;
unsigned long currentTime = millis();
unsigned long previousTime = 0; 
const long timeoutTime = 2000;

int runtime = 0;
int lock;
int time_spent;
int final_time;
int last_time = 0;
int best_time;

void setup() 
{
  pinMode(PTC, INPUT);
  Serial.begin(9600);
  EEPROM.begin(512);
  
  WiFi.begin("morenerob", "esp32projektos", 6);         //wifi connection
  while (WiFi.status() != WL_CONNECTED) 
  {
    delay(250);
    Serial.print(".");
  }

  Serial.println("WiFi connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());         //ipcka espcka
  server.begin();

  //lcd init:
  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.setCursor(0,0);
  lock = random(0,501);

  EEPROM.put(1, 0);
}

void loop() 
{
  
  time_spent = millis();
  
  for(int i = 0;i <= 10; i=i)
  {
    int raw = analogRead(PTC);
    int guess = map(raw, 0,4095,0,500);
    lcd.setCursor(0,0);
    lcd.print(lock);

    lcd.setCursor(0,1);
    lcd.print(guess < 100 ? "0" : ""); 
    lcd.print(guess);
    lcd.setCursor(0,0);
    
    if(guess == lock)
    {
      final_time = millis();
      final_time = final_time + time_spent;
      lock = random(0,501);
      i = i +1;
      Serial.println(i);
      lcd.clear();
    }

    if(i == 10)
    {
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("CAS: ");
      last_time = final_time;
      lcd.print(last_time);
      serialShow();

      if(EEPROM.get(1, best_time) > last_time)
      {
        EEPROM.put(1, last_time);
      }
      else if(EEPROM.get(1, best_time) == 0)
      {
        EEPROM.put(1, last_time);
      }
      EEPROM.put(2, last_time);
      startWeb();
    }
  }
} 

void startWeb()
{
  WiFiClient client = server.available();   // hlada ci sa niekto pripojil na stranku
  if (client) {                             // ak sa klient pripoji:
    currentTime = millis();
    previousTime = currentTime;
    Serial.println("New Client.");          // alert v seriali o tom, ze sa niekto pripojil
    String currentLine = "";                // String to hold incoming data from the client
    while (client.connected() && currentTime - previousTime <= timeoutTime) {  //loop kym je klient pripojeny
      currentTime = millis();
      if (client.available()) {             // if there's bytes to read from the client
        char c = client.read();             
        Serial.write(c);                    
        header += c;
        if (c == '\n') {                   
          if (currentLine.length() == 0) {
            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
            client.println("HTTP/1.1 200 OK");
            client.println("Content-type:text/html");
            client.println("Connection: close");
            client.println();
            
            // html kod
            client.println("<!DOCTYPE html><html>");
            client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
            client.println("<link rel=\"icon\" href=\"data:,\">");
            // simple css
            client.println("<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}");
            client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
            client.println("h1{font-size: 300px;}</style>");
            
            // content
            client.print("<body><h1>");
            client.print("BEST TIME: ");
            client.println(EEPROM.get(1, best_time));
            client.println("</h1><br><h1>");
            client.print("LAST TIME: ");
            client.println(EEPROM.get(2, last_time));
            client.println("</h1></body></html>");
            client.println();
            break;
          } else { 
            currentLine = "";
          }
        } else if (c != '\r') {  
          currentLine += c;      
        }
      }
    }
    // vycistit link
    header = "";
    // vypnut server
    client.stop();
    Serial.println("Client disconnected.");
    Serial.println("");
  }
}

void serialShow()
{
  Serial.print("BEST: ");
  Serial.println(EEPROM.get(1, best_time));
  Serial.print("LAST: ");
  Serial.println(last_time);
  delay(1000);
}