#include "ESP8266WiFi.h"

IPAddress apIP(192, 168, 4, 1);

void setup() {

  Serial.begin(115200);

  WiFi.mode(WIFI_STA);

//  WiFi.softAPConfig(apIP, apIP, IPAddress(255, 255, 255, 0));

//  WiFi.softAP("215-wifi","1234567890");

  WiFi.disconnect();

  delay(100);

  Serial.println("Setup done");

}

void loop() {

  Serial.println("scan start");

  // WiFi.scanNetworks will return the number of networks found

  int n = WiFi.scanNetworks();

  Serial.println("scan done");

  String maxwifi="";

  int wifiq=-100;

  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(")");

      /*

      byte：value表示加密类型

      TKIP（WPA）= 2

      WEP = 5  WEP 加密由于是一种静态加密方式，收发的包中就含有密码信息，因此可以非常容易地就直接破解密码，目前已经很少被使用

      CCMP（WPA）= 4  动态加密

      无= 7

      AUTO = 8

      */

      Serial.print((WiFi.encryptionType(i) == ENC_TYPE_NONE) ? " " : "*");//获取当前网络的加密类型

       Serial.print("   channel:");  Serial.print(WiFi.channel(i));   

       /*

        byte：value表示加密类型

        TKIP（WPA）= 2

        WEP = 5

        CCMP（WPA）= 4

        无= 7

        AUTO = 8

       */

       Serial.print("   encryptionType:");  Serial.println(WiFi.encryptionType(i));

/*

        using ESP8266WiFiScanClass::SSID;

        using ESP8266WiFiScanClass::encryptionType;

        using ESP8266WiFiScanClass::RSSI;

        using ESP8266WiFiScanClass::BSSID;

        using ESP8266WiFiScanClass::BSSIDstr;

        using ESP8266WiFiScanClass::channel;

        using ESP8266WiFiScanClass::isHidden;

*/

      if(WiFi.RSSI(i)>wifiq){

        wifiq= WiFi.RSSI(i); maxwifi=String(WiFi.SSID(i))   ;

        }

      delay(10);

    }

  }

  Serial.println("");

  Serial.print("maxwifi:");   Serial.println(maxwifi);

  //WiFi.softAP(maxwifi,"xixi",11);

  delay(5000);

}