#include "ESP8266WiFi.h"

void setup() {
 Serial.begin(115200);
 // Set WiFi to station mode and disconnect from an AP if it was previously connected
 WiFi.mode(WIFI_STA);
 WiFi.disconnect();
 delay(100);

 Serial.println("Setup done");
}

void loop() {
 Serial.println("Scan...");

 // WiFi.scanNetworks will return the number of networks found
 int n = WiFi.scanNetworks();
 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("dbm ");
     Serial.println((WiFi.encryptionType(i) == ENC_TYPE_NONE)?" ":"*");
     delay(10);
   }
 }
 Serial.println("");

 // Wait a bit before scanning again
 delay(2000);
}