//*
// *  This sketch demonstrates how to scan WiFi networks.
// *  The API is based on the Arduino WiFi Shield library, but has significant changes as newer WiFi functions are supported.
 //*  E.g. the return value of `encryptionType()` different because more modern encryption is supported.
// */
#include "WiFi.h"

//int led = 9;         // the PWM pin the LED is attached to
//int brightness = 0;  // how bright the LED is
//int fadeAmount = 5;  // how many points to fade the LED by
// constants won't change. Used here to set a pin number:
const int ledPin = LED_BUILTIN;  
// the number of the LED pin

// Variables will change:
int ledState = LOW;  // ledState used to set the LED

// Generally, you should use "unsigned long" for variables that hold time
// The value will quickly become too large for an int to store
unsigned long previousMillis = 0;  // will store last time LED was updated
unsigned long currentMillis = 0;

// constants won't change:
const long interval = 500;  // interval at which to blink (milliseconds)
const long interval2= 1000;  // delay for recycle (milliseconds)

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

    // set the digital pin as output:
    pinMode(ledPin, OUTPUT);

  
    // Set WiFi to station mode and disconnect from an AP if it was previously connected.
    WiFi.mode(WIFI_STA);
    //Serial.println(WiFi.macAddress());
    WiFi.disconnect();
    delay(100);
    
    Serial.println("Setup done");
    //delay(2000);
}

void loop() {
   unsigned long currentMillis = millis();
  // Call Functions:
  BlinkLED(); //Blink 500ms
  ScanWiFi(); //Scan for active WiFi

}

void BlinkLED() {


   
  // check to see if it's time to blink the LED; that is, if the difference
  // between the current time and last time you blinked the LED is bigger than
  // the interval at which you want to blink the LED.
    unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= interval) {
    // save the last time you blinked the LED
    previousMillis = currentMillis;

    // if the LED is off turn it on and vice-versa:
    if (ledState == LOW) {
      ledState = HIGH;
    } else {
      ledState = LOW;
    }

    // set the LED with the ledState of the variable:
    digitalWrite(ledPin, ledState);
  }
}  
void ScanWiFi() {
  Serial.println("Scan start");
   //unsigned long currentMillis = millis();
      //if (currentMillis - previousMillis <= interval2) {
    // 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");
        Serial.println("Nr | SSID                             | RSSI | CH | Encryption");
        for (int i = 0; i < n; ++i) {
            // Print SSID and RSSI for each network found
            Serial.printf("%2d",i + 1);
            Serial.print(" | ");
            Serial.printf("%-32.32s", WiFi.SSID(i).c_str());
            Serial.print(" | ");
            Serial.printf("%4d", WiFi.RSSI(i));
            Serial.print(" | ");
            Serial.printf("%2d", WiFi.channel(i));
            Serial.print(" | ");
            switch (WiFi.encryptionType(i))
            {
            case WIFI_AUTH_OPEN:
                Serial.print("open");
                break;
            case WIFI_AUTH_WEP:
                Serial.print("WEP");
                break;
            case WIFI_AUTH_WPA_PSK:
                Serial.print("WPA");
                break;
            case WIFI_AUTH_WPA2_PSK:
                Serial.print("WPA2");
                break;
            case WIFI_AUTH_WPA_WPA2_PSK:
                Serial.print("WPA+WPA2");
                break;
            case WIFI_AUTH_WPA2_ENTERPRISE:
                Serial.print("WPA2-EAP");
                break;
            case WIFI_AUTH_WPA3_PSK:
                Serial.print("WPA3");
                break;
            case WIFI_AUTH_WPA2_WPA3_PSK:
                Serial.print("WPA2+WPA3");
                break;
            case WIFI_AUTH_WAPI_PSK:
                Serial.print("WAPI");
                break;
            default:
                Serial.print("unknown");
            }
            Serial.println();
            delay(10);
        }
    }
    Serial.println("");

    // Delete the scan result to free memory for code below.
    WiFi.scanDelete();

    }