#include "WiFi.h"

void setup() {
  Serial.begin(115200);
  Serial.println("Initializing WiFi.");
  WiFi.mode(WIFI_STA);
  Serial.println("Setup done!");
}

void loop() {
  Serial.println("Scanning...");
  
  // 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.print(n);
    Serial.println(" networks found");
    for (int i = 0; i < n; i++) {
      // Print SSID and RSSI for each network found
      Serial.print(i + 1);
      Serial.print(": ");
      Serial.print(WiFi.SSID(i));
      Serial.print(" (");
      Serial.print(WiFi.RSSI(i));
      Serial.print(")");
      // Print encryption type
      String encryption = "Unknown";
      switch (WiFi.encryptionType(i)) {
        case WIFI_AUTH_OPEN:
          encryption = "Open";
          break;
        case WIFI_AUTH_WEP:
          encryption = "WEP";
          break;
        case WIFI_AUTH_WPA_PSK:
          encryption = "WPA/PSK";
          break;
        case WIFI_AUTH_WPA2_PSK:
          encryption = "WPA2/PSK";
          break;
        case WIFI_AUTH_WPA_WPA2_PSK:
          encryption = "WPA/WPA2/PSK";
          break;
        case WIFI_AUTH_WPA2_ENTERPRISE:
          encryption = "WPA2 Enterprise";
          break;
        default:
          break;
      }
      Serial.print(" [");
      Serial.print(encryption);
      Serial.println("]");
    }
  }
  // Wait a bit before scanning again
  delay(5000);
}