Wokwi - Online ESP32, STM32, Arduino Simulator

#include <WiFi.h>
#include <WebServer.h>

// GAS AND FLAME DETECTOR

// GAS DETECTOR
int GasInput = 14; // Digital pin for gas detector
int GasBuzzer = 33; // Buzzer pin for gas detector
int GasMAX = 400;

// FLAME DETECTOR
int FlameSensor = 12; // Digital pin for flame detector
int FlameBuzzer = 26; // Buzzer pin for flame detector

int gasVal;
int flameVal;

const char* ssid = "Wokwi-GUEST";
const char* password = "";
WebServer server(80);

void setup() {
  Serial.begin(9600);
  pinMode(GasInput, INPUT);
  pinMode(GasBuzzer, OUTPUT); // Set buzzer pin as output
  pinMode(FlameSensor, INPUT);
  pinMode(FlameBuzzer, OUTPUT);

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

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

  // Route for root / web page
  server.on("/", HTTP_GET, handleRoot);
  // Route to handle buzzer control
  server.on("/buzzer", HTTP_POST, handleBuzzer);

  // Start server
  server.begin();
}

void loop() {
  // Gas Detector
  gasVal = digitalRead(GasInput);
  if (gasVal == HIGH) {
    digitalWrite(GasBuzzer, HIGH); // Turn on buzzer if gas detected
    Serial.println("GAS LEAKING");
  } else {
    digitalWrite(GasBuzzer, LOW); // Turn off buzzer if no gas detected
    Serial.println("NORMAL");
  }

  // Flame Detector
  flameVal = digitalRead(FlameSensor);
  digitalWrite(FlameBuzzer, flameVal); // Control flame buzzer based on flame sensor reading

  // Handle HTTP requests
  server.handleClient();
}

void handleRoot() {
  String gasStatus = (gasVal == HIGH) ? "Gas Leaking" : "Normal";
  String flameStatus = (flameVal == HIGH) ? "Flame Detected" : "No Flame";

  String html = "<!DOCTYPE html>\
<html>\
<head>\
<title>Gas and Flame Detector</title>\
</head>\
<body>\
<h1>Gas and Flame Detector</h1>\
<h2>Gas Detector:</h2>\
<p>Status: " + gasStatus + "</p>\
<h2>Flame Detector:</h2>\
<p>Status: " + flameStatus + "</p>\
<h3>Control Flame Detector Buzzer:</h3>\
<form action=\"/buzzer\" method=\"post\">\
<button type=\"submit\" name=\"action\" value=\"on\">Turn On Buzzer</button>\
<button type=\"submit\" name=\"action\" value=\"off\">Turn Off Buzzer</button>\
</form>\
</body>\
</html>";

  server.send(200, "text/html", html);
}

void handleBuzzer() {
  if (server.hasArg("action")) {
    String action = server.arg("action");
    if (action == "on") {
      digitalWrite(FlameBuzzer, HIGH); // Turn on flame buzzer
    } else if (action == "off") {
      digitalWrite(FlameBuzzer, LOW); // Turn off flame buzzer
    }
  }
  server.send(200, "text/plain", "Buzzer control handled");
}