Wokwi - Online ESP32, STM32, Arduino Simulator

#include "WiFi.h"
#include "ESPAsyncWebServer.h"

AsyncWebServer server(80);

int count = 0;
const int relay1 = 19;
const int relay2 = 18;

const char* ssid = "Wokwi-GUEST";
const char* password = "";

const char index_html[] PROGMEM = R"rawliteral(
<!DOCTYPE HTML><html>
<head>
  <meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
  <h2>Hello World</h2>
</body>
</html>
)rawliteral";

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi..");
  }

  // Print ESP32 Local IP Address
  Serial.println(WiFi.localIP());

   // Route for root / web page
  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
    request->send_P(200, "text/html", index_html);
  });

  pinMode(relay1, OUTPUT);
  pinMode(relay2, OUTPUT);
}

void loop() {
  count++;
  // put your main code here, to run repeatedly:
  Serial.println(count);
  Serial.println("Hello, World! ");

  digitalWrite(relay1, HIGH);
  digitalWrite(relay2, LOW);
  delay(1000); 
  digitalWrite(relay1, LOW);
  digitalWrite(relay2, HIGH);
  delay(1000); 
}