Wokwi - Online ESP32, STM32, Arduino Simulator

#include <WiFi.h>
#include <ESPAsyncWebServer.h>
#include <OneWire.h>
#include <DallasTemperature.h>

#define ONE_WIRE_BUS 4

OneWire oneWire(ONE_WIRE_BUS);

DallasTemperature sensor(&oneWire);

String temperatureC = "";

unsigned long lastTime = 0;
unsigned long timerDelay = 30000;

const char* ssid = "Wokwi-GUEST";

AsyncWebServer server(80);

String readDSTemperatureC () {
  sensor.requestTemperatures();
  float tempC = sensor.getTempCByIndex(0);

  if(tempC == -127.00) {
    Serial.println("Falha em ler o sensor DS18B20");
    return "--";
  } else {
    Serial.print("Temperatura (oC): ");
    Serial.println(tempC);
  }
  return String(tempC);
}

const char index_html[] PROGMEM = R"rawliteral (
  <!DOCTYPE HTML<>html>
  <head>
    <meta name = "viewpoint" content = "width = device-width, initial-scale = 1">
    <link rel = "stylesheet" href = "https://use.fontawesome.com/releases/v5.7.2/css/all.css" integrity = "sha384-fnmOCqbTlWIlj8LyTjo7mOUStjsKC4pOpQbqyi7RrhN7udi9RwhKkMHpvLbHG9Sr" crossorigin = "anonymous">
    <style>
      html {
        font-family: Arial;
        display: inline-block;
        margin: 0px auto;
        text-align: center;
        h2 { font-size: 3.0rem; }
        p { font-size:3.0rem; }
        .units { font-size:1.2rem; }
        .ds-labels {
          font-size: 1.5rem;
          vertical-align: middle;
          padding-bottom: 15px;
        }
    </style>
      }
)
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32-S3!");
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}