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

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

const char* MQTT_username = NULL;
const char* MQTT_password = NULL;
const char* MQTT_server = "broker.emqx.io";

WiFiClient espClient;
PubSubClient client(espClient);

const int sensor = 13;
const int LED = 5;
int val;

void setup() {
  Serial.begin(115200);
  pinMode(sensor, INPUT);
  pinMode(LED, OUTPUT);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  // Connect to MQTT broker
  client.setServer(MQTT_server, 1883);
  while (!client.connected()) {
    Serial.println("Connecting to MQTT...");
    if (client.connect("ESP32Client")) {
      Serial.println("Connected to MQTT");
    } else {
      Serial.print("Failed, rc=");
      Serial.print(client.state());
      Serial.println(" Retry in 2 seconds");
      delay(2000);
    }
  }
}

void loop() {
  client.connect("ESP32Client");
  val= digitalRead(sensor);
  if(val== 0)
 {
  digitalWrite(LED, LOW);
  client.publish("mouvement", String("no movement detected... ").c_str());
  Serial.print("No movement \n");
  delay(500);
 }
  
 if(val== 1)
 {
  digitalWrite(LED, HIGH);
  client.publish("mouvement", String("Alert! movement detected!").c_str());
  Serial.print("movement detected \n");
  delay(500);
 }

}