Wokwi - Online ESP32, STM32, Arduino Simulator

#include <WiFi.h>
#include <EEPROM.h>

WiFiServer server(80);

String header;

unsigned long currentTime = millis();
unsigned long previousTime = 0;
const long timeoutTime = 2000;

String names[10] = {"Matus", "Jano", "Rudo", "Robo", "Vlado", "Milos", "Brano", "Jozo", "Fero", "Lukas"};
byte buttons[10] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0};

void setup() {
  Serial.begin(9600);

  WiFi.begin("Moja WIFI", "Bohtamiluje");
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
    Serial.print(".");
  }

  Serial.println("WiFi úspešne pripojené!");
  Serial.print("IP adresa: ");
  Serial.println(WiFi.localIP());

  EEPROM.begin(512);

  server.begin();

  for(int i = 0; i < 10; i++){
    buttons[i] = EEPROM.read(i+1);
    Serial.print(buttons[i]);
  }
}


void loop() {

  WiFiClient client = server.available();  // aktualizovanie prijatých dát

  if (client)  // ak sa pripojil klient
  {
    currentTime = millis();
    previousTime = currentTime;
    Serial.println("Nový klient");
    String currentLine = "";  // premená pre prijaté dáta
    while (client.connected() && currentTime - previousTime <= timeoutTime) {
      currentTime = millis();
      if (client.available())  // test, či sú prijaté dáke dáta
      {
        char c = client.read();  // načítanie bajtu z buffera
        Serial.write(c);
        header += c;

        if (c == '\n')  // po ENTER je request
        {
          if (currentLine.length() == 0)  // ak sa načítal prázdny riadok, odošli potvrdenie o pripojení
          {
            client.println("HTTP/1.1 200 OK");
            client.println("Content-type:text/html");
            client.println("Connection: close");
            client.println("");

            for (int i = 0; i < 10; i++) {
              String turnOn = "GET /r_" + names[i];
              String turnOff = "GET /g_" + names[i];

              if (header.indexOf(turnOn) >= 0) {
                buttons[i] = 1;
                
              } else if (header.indexOf(turnOff) >= 0) {
                buttons[i] = 0;
              }
              EEPROM.write(i+1, buttons[i]);
              Serial.print(buttons[i]);
            }

            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:,\">");
            client.println("<style>body { text-align: center; font-family: \"Trebuchet MS\", Arial; margin-left:auto; margin-right:auto;}");
            client.println("button{ border: 0px, solid; border-radius: 10px; padding: 25px; font-size: 20px;}");
            client.println("</style></head><body><h1>ESP32 with Buttons</h1>");
            
            for(int i = 0; i < 10; i++){
              if(buttons[i] == 0){
                client.println("<p><a href='r_"+names[i]+"'><button style='background-color: #f44336; color: #ffffff;'>"+names[i]+"</button></a></p>");
              }
              else if(buttons[i] == 1){
                client.println("<p><a href='g_"+names[i]+"'><button style='background-color: #4CAF50; color: #ffffff;'>"+names[i]+"</button></a></p>");
              }
            }
           
            EEPROM.commit();
            client.println("</body></html>");

            client.println("");
            break;
          } else {
            currentLine = "";
          }
        } else if (c != '\r') {
          currentLine += c;  // add it to the end of the currentLine
        }
      }
    }

    header = "";
    client.stop();
    Serial.println("Klient je odpojený.");
    Serial.println("");
  }
}