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

#define PIR_PIN 28

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "broker.hivemq.com";

WiFiClient espClient;
PubSubClient client(espClient);

int lastState = LOW;

void setup_wifi() {
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
  }
}

void reconnect() {
  while (!client.connected()) {
    client.connect("pico_in");
  }
}

void setup() {
  pinMode(PIR_PIN, INPUT);
  Serial.begin(115200);

  setup_wifi();
  client.setServer(mqtt_server, 1883);
}

void loop() {
  if (!client.connected()) reconnect();
  client.loop();

  int val = digitalRead(PIR_PIN);

  if (val == HIGH && lastState == LOW) {
    client.publish("gate/in", "1");
    delay(1000); // debounce
  }

  lastState = val;
  delay(100);
}