/* ESP32 WiFi Scanning example */

#include "WiFi.h"
#include <PubSubClient.h>
const char* mqtt_server = "test.mosquitto.org";
const char* mqtt_topic = "wokwi/test";
WiFiClient espclient;
PubSubClient client(espclient);

void setup() {
  Serial.begin(115200);
  Serial.println("Initializing WiFi...");
  WiFi.mode(WIFI_STA);
  Serial.println("Setup done!");
  // WiFi.scanNetworks will return the number of networks found
  int n = WiFi.scanNetworks();
  Serial.println("Scan done!");
  if (n == 0) {
    Serial.println("No networks found.");
  } else {
    Serial.println();
    Serial.print(n);
    Serial.println(" networks found");

  Serial.println("");
  WiFi.begin("Wokwi-GUEST");
  if(WiFi.isConnected()){
    Serial.println("connected");
  }
  client.setServer(mqtt_server, 1883);
}

void loop() {
  client.loop();
  String payload = String("Hello from Wokwi! Timestamp: ") + millis();
  Serial.print("Publishing message: ");
  Serial.println(payload);

  client.publish(mqtt_topic, payload.c_str());
  // Wait a bit before scanning again
  delay(5000);
}