wifi扫描

获取当前位置的wifi，信道，强度，mac

#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);
}