#include <WiFi.h>
#include <PubSubClient.h>

// Replace with your network credentials
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// Replace with your MQTT broker details
const char* mqttServer = "broker.emqx.io";
const int mqttPort = 1883;

// Replace with your LED pin
const int ledPin = 5;

WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
  // Start Serial Monitor
  Serial.begin(115200);

  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
  }
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());

  // Set the LED pin as an output
  pinMode(ledPin, OUTPUT);

  // Set up MQTT client
  client.setServer(mqttServer, mqttPort);
}

void loop() {
  if (!client.connected()) {
  digitalWrite(ledPin, HIGH); // turn the LED on
  delay(500);                  // wait for 500 milliseconds
  digitalWrite(ledPin, LOW);  // turn the LED off
  delay(500); 
  }
  
  }


esp:VIN
esp:GND.2
esp:D13
esp:D12
esp:D14
esp:D27
esp:D26
esp:D25
esp:D33
esp:D32
esp:D35
esp:D34
esp:VN
esp:VP
esp:EN
esp:3V3
esp:GND.1
esp:D15
esp:D2
esp:D4
esp:RX2
esp:TX2
esp:D5
esp:D18
esp:D19
esp:D21
esp:RX0
esp:TX0
esp:D22
esp:D23
led1:A
led1:C