#include <Arduino.h>
#include <WiFi.h>  // Arduino-ESP32 WiFi (works on ESP32-C6 with Arduino 3.x)

static const char* authModeToStr(wifi_auth_mode_t m) {
  switch (m) {
    case WIFI_AUTH_OPEN:           return "OPEN";
    case WIFI_AUTH_WEP:            return "WEP";
    case WIFI_AUTH_WPA_PSK:        return "WPA_PSK";
    case WIFI_AUTH_WPA2_PSK:       return "WPA2_PSK";
    case WIFI_AUTH_WPA_WPA2_PSK:   return "WPA/WPA2_PSK";
    case WIFI_AUTH_WPA2_ENTERPRISE:return "WPA2_ENT";
    case WIFI_AUTH_WPA3_PSK:       return "WPA3_PSK";
    case WIFI_AUTH_WPA2_WPA3_PSK:  return "WPA2/WPA3";
    case WIFI_AUTH_WAPI_PSK:       return "WAPI_PSK";
    case WIFI_AUTH_OWE:            return "OWE";
    default:                       return "UNKNOWN";
  }
}

void setup() {
  Serial.begin(115200);
  delay(300);

  // Scan as a station, disconnected
  WiFi.mode(WIFI_STA);
  WiFi.persistent(false);
  WiFi.disconnect(true, true);
  WiFi.setSleep(false);

  Serial.println("\nWiFi scanner ready.");
}

void loop() {
  Serial.println("\n--- Scanning... ---");

  // Synchronous scan; set 2nd arg to true to include hidden SSIDs
  int n = WiFi.scanNetworks(/*async=*/false, /*show_hidden=*/true);
  if (n <= 0) {
    Serial.println("No networks found.");
  } else {
    Serial.printf("Found %d network(s):\n", n);
    for (int i = 0; i < n; ++i) {
      String ssid   = WiFi.SSID(i);
      String bssid  = WiFi.BSSIDstr(i);
      int32_t rssi  = WiFi.RSSI(i);
      int32_t ch    = WiFi.channel(i);
      auto  auth    = (wifi_auth_mode_t)WiFi.encryptionType(i);

      bool hidden = (ssid.length() == 0);   // no API needed
      if (hidden) ssid = "(hidden)";

      Serial.printf("%2d) %-32s  BSSID:%s  CH:%2ld  RSSI:%4ld dBm  AUTH:%s\n",
        i + 1, ssid.c_str(), bssid.c_str(), (long)ch, (long)rssi, authModeToStr(auth)
      );
    }
  }

  WiFi.scanDelete();     // free RAM
  delay(5000);
}