#include "WiFi.h"
#include "PubSubClient.h"

WiFiClient espClient;
PubSubClient client(espClient);
static char strDetection[10] = {0};
char clientID[50];
int value = 0;

void setup() {
  WiFi.mode(WIFI_STA);
  WiFi.begin("Wokwi-GUEST", "");
  client.setServer("broker.emqx.io", 1883);

  pinMode(4, INPUT);

  Serial.begin(9600);
}

void mqttReconnect() {
  while (!client.connected()) 
  {
    Serial.print("Attempting MQTT connection...");
    if (client.connect(clientID)) 
    {
      Serial.println("Connected");
    } 
    else 
    {
      Serial.println("Connection failed trying again in 5 seconds");
      delay(5000);
    }
  }
}

void loop() {
  if (!client.connected()) {
    mqttReconnect();
  }
  client.loop();
  delay(3000);
  value = digitalRead(4);
  Serial.println(value);
  sprintf(strDetection, "%d", value);
  client.publish("topicName/lights", strDetection);
}